/* * Cppcheck - A tool for static C/C++ code analysis * Copyright (C) 2007-2021 Cppcheck team. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ //--------------------------------------------------------------------------- #include "tokenize.h" #include "check.h" #include "errorlogger.h" #include "library.h" #include "mathlib.h" #include "platform.h" #include "preprocessor.h" #include "settings.h" #include "standards.h" #include "summaries.h" #include "symboldatabase.h" #include "templatesimplifier.h" #include "timer.h" #include "token.h" #include "utils.h" #include "valueflow.h" #include #include #include #include #include #include #include #include #include #include //--------------------------------------------------------------------------- namespace { // local struct used in setVarId // in order to store information about the scope struct VarIdScopeInfo { VarIdScopeInfo() : isExecutable(false), isStructInit(false), isEnum(false), startVarid(0) {} VarIdScopeInfo(bool isExecutable, bool isStructInit, bool isEnum, nonneg int startVarid) : isExecutable(isExecutable), isStructInit(isStructInit), isEnum(isEnum), startVarid(startVarid) {} const bool isExecutable; const bool isStructInit; const bool isEnum; const nonneg int startVarid; }; } /** Return whether tok is the "{" that starts an enumerator list */ static bool isEnumStart(const Token* tok) { if (!tok || tok->str() != "{") return false; return (tok->strAt(-1) == "enum") || (tok->strAt(-2) == "enum"); } template static void skipEnumBody(T **tok) { T *defStart = *tok; while (Token::Match(defStart, "%name%|::|:")) defStart = defStart->next(); if (defStart && defStart->str() == "{") *tok = defStart->link()->next(); } const Token * Tokenizer::isFunctionHead(const Token *tok, const std::string &endsWith) const { return Tokenizer::isFunctionHead(tok, endsWith, isCPP()); } const Token * Tokenizer::isFunctionHead(const Token *tok, const std::string &endsWith, bool cpp) { if (!tok) return nullptr; if (tok->str() == "(") tok = tok->link(); if (Token::Match(tok, ") ;|{|[")) { tok = tok->next(); while (tok && tok->str() == "[" && tok->link()) { if (endsWith.find(tok->str()) != std::string::npos) return tok; tok = tok->link()->next(); } return (tok && endsWith.find(tok->str()) != std::string::npos) ? tok : nullptr; } if (cpp && tok->str() == ")") { tok = tok->next(); while (Token::Match(tok, "const|noexcept|override|final|volatile|&|&& !!(") || (Token::Match(tok, "%name% !!(") && tok->isUpperCaseName())) tok = tok->next(); if (tok && tok->str() == ")") tok = tok->next(); while (tok && tok->str() == "[") tok = tok->link()->next(); if (Token::Match(tok, "throw|noexcept (")) tok = tok->linkAt(1)->next(); if (Token::Match(tok, "%name% (") && tok->isUpperCaseName()) tok = tok->linkAt(1)->next(); if (tok && tok->originalName() == "->") { // trailing return type for (tok = tok->next(); tok && !Token::Match(tok, ";|{|override|final"); tok = tok->next()) if (tok->link() && Token::Match(tok, "<|[|(")) tok = tok->link(); } while (Token::Match(tok, "override|final !!(") || (Token::Match(tok, "%name% !!(") && tok->isUpperCaseName())) tok = tok->next(); if (Token::Match(tok, "= 0|default|delete ;")) tok = tok->tokAt(2); return (tok && endsWith.find(tok->str()) != std::string::npos) ? tok : nullptr; } return nullptr; } /** * is tok the start brace { of a class, struct, union, or enum */ static bool isClassStructUnionEnumStart(const Token * tok) { if (!Token::Match(tok->previous(), "class|struct|union|enum|%name%|>|>> {")) return false; const Token * tok2 = tok->previous(); while (tok2 && !Token::Match(tok2, "class|struct|union|enum|{|}|;")) tok2 = tok2->previous(); return Token::Match(tok2, "class|struct|union|enum"); } //--------------------------------------------------------------------------- Tokenizer::Tokenizer() : list(nullptr), mSettings(nullptr), mErrorLogger(nullptr), mSymbolDatabase(nullptr), mTemplateSimplifier(nullptr), mVarId(0), mUnnamedCount(0), mCodeWithTemplates(false), //is there any templates? mTimerResults(nullptr) #ifdef MAXTIME , mMaxTime(std::time(0) + MAXTIME) #endif , mPreprocessor(nullptr) {} Tokenizer::Tokenizer(const Settings *settings, ErrorLogger *errorLogger) : list(settings), mSettings(settings), mErrorLogger(errorLogger), mSymbolDatabase(nullptr), mTemplateSimplifier(nullptr), mVarId(0), mUnnamedCount(0), mCodeWithTemplates(false), //is there any templates? mTimerResults(nullptr) #ifdef MAXTIME ,mMaxTime(std::time(0) + MAXTIME) #endif , mPreprocessor(nullptr) { // make sure settings are specified assert(mSettings); mTemplateSimplifier = new TemplateSimplifier(this); } Tokenizer::~Tokenizer() { delete mSymbolDatabase; delete mTemplateSimplifier; } //--------------------------------------------------------------------------- // SizeOfType - gives the size of a type //--------------------------------------------------------------------------- nonneg int Tokenizer::sizeOfType(const Token *type) const { if (!type || type->str().empty()) return 0; if (type->tokType() == Token::eString) return Token::getStrLength(type) + 1U; const std::map::const_iterator it = mTypeSize.find(type->str()); if (it == mTypeSize.end()) { const Library::PodType* podtype = mSettings->library.podtype(type->str()); if (!podtype) return 0; return podtype->size; } else if (type->isLong()) { if (type->str() == "double") return mSettings->sizeof_long_double; else if (type->str() == "long") return mSettings->sizeof_long_long; } return it->second; } //--------------------------------------------------------------------------- // check if this statement is a duplicate definition bool Tokenizer::duplicateTypedef(Token **tokPtr, const Token *name, const Token *typeDef) const { // check for an end of definition const Token * tok = *tokPtr; if (tok && Token::Match(tok->next(), ";|,|[|=|)|>|(|{")) { const Token * end = tok->next(); if (end->str() == "[") { if (!end->link()) syntaxError(end); // invalid code end = end->link()->next(); } else if (end->str() == ",") { // check for derived class if (Token::Match(tok->previous(), "public|private|protected")) return false; // find end of definition while (end && end->next() && !Token::Match(end->next(), ";|)|>")) { if (end->next()->str() == "(") end = end->linkAt(1); end = (end)?end->next():nullptr; } if (end) end = end->next(); } else if (end->str() == "(") { if (tok->previous()->str().compare(0, 8, "operator") == 0) { // conversion operator return false; } else if (tok->previous()->str() == "typedef") { // typedef of function returning this type return false; } else if (Token::Match(tok->previous(), "public:|private:|protected:")) { return false; } else if (tok->previous()->str() == ">") { if (!Token::Match(tok->tokAt(-2), "%type%")) return false; if (!Token::Match(tok->tokAt(-3), ",|<")) return false; *tokPtr = end->link(); return true; } } if (end) { if (Token::simpleMatch(end, ") {")) { // function parameter ? // look backwards if (Token::Match(tok->previous(), "%type%") && !Token::Match(tok->previous(), "return|new|const|struct")) { // duplicate definition so skip entire function *tokPtr = end->next()->link(); return true; } } else if (end->str() == ">") { // template parameter ? // look backwards if (Token::Match(tok->previous(), "%type%") && !Token::Match(tok->previous(), "return|new|const|volatile")) { // duplicate definition so skip entire template while (end && end->str() != "{") end = end->next(); if (end) { *tokPtr = end->link(); return true; } } } else { // look backwards if (Token::Match(tok->previous(), "typedef|}|>") || (end->str() == ";" && tok->previous()->str() == ",") || (tok->previous()->str() == "*" && tok->next()->str() != "(") || (Token::Match(tok->previous(), "%type%") && (!Token::Match(tok->previous(), "return|new|const|friend|public|private|protected|throw|extern") && !Token::simpleMatch(tok->tokAt(-2), "friend class")))) { // scan backwards for the end of the previous statement while (tok && tok->previous() && !Token::Match(tok->previous(), ";|{")) { if (tok->previous()->str() == "}") { tok = tok->previous()->link(); } else if (tok->previous()->str() == "typedef") { return true; } else if (tok->previous()->str() == "enum") { return true; } else if (tok->previous()->str() == "struct") { if (tok->strAt(-2) == "typedef" && tok->next()->str() == "{" && typeDef->strAt(3) != "{") { // declaration after forward declaration return true; } else if (tok->next()->str() == "{") { return true; } else if (Token::Match(tok->next(), ")|*")) { return true; } else if (tok->next()->str() == name->str()) { return true; } else if (tok->next()->str() != ";") { return true; } else { return false; } } else if (tok->previous()->str() == "union") { if (tok->next()->str() != ";") { return true; } else { return false; } } else if (isCPP() && tok->previous()->str() == "class") { if (tok->next()->str() != ";") { return true; } else { return false; } } if (tok) tok = tok->previous(); } if ((*tokPtr)->strAt(1) != "(" || !Token::Match((*tokPtr)->linkAt(1), ") .|(|[")) return true; } } } } return false; } void Tokenizer::unsupportedTypedef(const Token *tok) const { if (!mSettings->debugwarnings) return; std::ostringstream str; const Token *tok1 = tok; int level = 0; while (tok) { if (level == 0 && tok->str() == ";") break; else if (tok->str() == "{") ++level; else if (tok->str() == "}") { if (level == 0) break; --level; } if (tok != tok1) str << " "; str << tok->str(); tok = tok->next(); } if (tok) str << " ;"; reportError(tok1, Severity::debug, "simplifyTypedef", "Failed to parse \'" + str.str() + "\'. The checking continues anyway."); } Token * Tokenizer::deleteInvalidTypedef(Token *typeDef) { Token *tok = nullptr; // remove typedef but leave ; while (typeDef->next()) { if (typeDef->next()->str() == ";") { typeDef->deleteNext(); break; } else if (typeDef->next()->str() == "{") Token::eraseTokens(typeDef, typeDef->linkAt(1)); else if (typeDef->next()->str() == "}") break; typeDef->deleteNext(); } if (typeDef != list.front()) { tok = typeDef->previous(); tok->deleteNext(); } else { list.front()->deleteThis(); tok = list.front(); } return tok; } namespace { struct Space { Space() : bodyEnd(nullptr), bodyEnd2(nullptr), isNamespace(false) {} std::string className; const Token * bodyEnd; // for body contains typedef define const Token * bodyEnd2; // for body contains typedef using bool isNamespace; std::set recordTypes; }; } static Token *splitDefinitionFromTypedef(Token *tok, nonneg int *unnamedCount) { std::string name; bool isConst = false; Token *tok1 = tok->next(); // skip const if present if (tok1->str() == "const") { tok1->deleteThis(); isConst = true; } // skip "class|struct|union|enum" tok1 = tok1->next(); const bool hasName = Token::Match(tok1, "%name%"); // skip name if (hasName) { name = tok1->str(); tok1 = tok1->next(); } // skip base classes if present if (tok1->str() == ":") { tok1 = tok1->next(); while (tok1 && tok1->str() != "{") tok1 = tok1->next(); if (!tok1) return nullptr; } // skip to end tok1 = tok1->link(); if (!hasName) { // unnamed if (tok1->next()) { // use typedef name if available if (Token::Match(tok1->next(), "%type%")) name = tok1->next()->str(); else // create a unique name name = "Unnamed" + MathLib::toString((*unnamedCount)++); tok->next()->insertToken(name); } else return nullptr; } tok1->insertToken(";"); tok1 = tok1->next(); if (tok1->next() && tok1->next()->str() == ";" && tok1->previous()->str() == "}") { tok->deleteThis(); tok1->deleteThis(); return nullptr; } else { tok1->insertToken("typedef"); tok1 = tok1->next(); Token * tok3 = tok1; if (isConst) { tok1->insertToken("const"); tok1 = tok1->next(); } tok1->insertToken(tok->next()->str()); // struct, union or enum tok1 = tok1->next(); tok1->insertToken(name); tok->deleteThis(); tok = tok3; } return tok; } /* This function is called when processing function related typedefs. * If simplifyTypedef generates an "Internal Error" message and the * code that generated it deals in some way with functions, then this * function will probably need to be extended to handle a new function * related pattern */ Token *Tokenizer::processFunc(Token *tok2, bool inOperator) const { if (tok2->next() && tok2->next()->str() != ")" && tok2->next()->str() != ",") { // skip over tokens for some types of canonicalization if (Token::Match(tok2->next(), "( * %type% ) (")) tok2 = tok2->linkAt(5); else if (Token::Match(tok2->next(), "* ( * %type% ) (")) tok2 = tok2->linkAt(6); else if (Token::Match(tok2->next(), "* ( * %type% ) ;")) tok2 = tok2->tokAt(5); else if (Token::Match(tok2->next(), "* ( %type% [") && Token::Match(tok2->linkAt(4), "] ) ;|=")) tok2 = tok2->linkAt(4)->next(); else if (Token::Match(tok2->next(), "* ( * %type% (")) tok2 = tok2->linkAt(5)->next(); else if (Token::simpleMatch(tok2->next(), "* [") && Token::simpleMatch(tok2->linkAt(2), "] ;")) tok2 = tok2->next(); else { if (tok2->next()->str() == "(") tok2 = tok2->next()->link(); else if (!inOperator && !Token::Match(tok2->next(), "[|>|;")) { tok2 = tok2->next(); while (Token::Match(tok2, "*|&") && !Token::Match(tok2->next(), ")|>")) tok2 = tok2->next(); // skip over namespace while (Token::Match(tok2, "%name% ::")) tok2 = tok2->tokAt(2); if (!tok2) return nullptr; if (tok2->str() == "(" && tok2->link()->next() && tok2->link()->next()->str() == "(") { tok2 = tok2->link(); if (tok2->next()->str() == "(") tok2 = tok2->next()->link(); } // skip over typedef parameter if (tok2->next() && tok2->next()->str() == "(") { tok2 = tok2->next()->link(); if (!tok2->next()) syntaxError(tok2); if (tok2->next()->str() == "(") tok2 = tok2->next()->link(); } } } } return tok2; } void Tokenizer::simplifyUsingToTypedef() { if (!isCPP() || mSettings->standards.cpp < Standards::CPP11) return; for (Token *tok = list.front(); tok; tok = tok->next()) { // using a::b; => typedef a::b b; if ((Token::Match(tok, "[;{}] using %name% :: %name% ::|;") && !tok->tokAt(2)->isKeyword()) || (Token::Match(tok, "[;{}] using :: %name% :: %name% ::|;") && !tok->tokAt(3)->isKeyword())) { Token *endtok = tok->tokAt(5); if (Token::Match(endtok, "%name%")) endtok = endtok->next(); while (Token::Match(endtok, ":: %name%")) endtok = endtok->tokAt(2); if (endtok && endtok->str() == ";") { tok->next()->str("typedef"); endtok = endtok->previous(); endtok->insertToken(endtok->str()); } } } } void Tokenizer::simplifyTypedef() { std::vector spaceInfo; bool isNamespace = false; std::string className; std::string fullClassName; bool hasClass = false; bool goback = false; // add global namespace spaceInfo.emplace_back(Space{}); // Convert "using a::b;" to corresponding typedef statements simplifyUsingToTypedef(); for (Token *tok = list.front(); tok; tok = tok->next()) { if (mErrorLogger && !list.getFiles().empty()) mErrorLogger->reportProgress(list.getFiles()[0], "Tokenize (typedef)", tok->progressValue()); if (Settings::terminated()) return; if (isMaxTime()) return; if (goback) { //jump back once, see the comment at the end of the function goback = false; tok = tok->previous(); } if (tok->str() != "typedef") { if (Token::simpleMatch(tok, "( typedef")) { // Skip typedefs inside parentheses (#2453 and #4002) tok = tok->next(); } else if (Token::Match(tok, "class|struct|namespace %any%") && (!tok->previous() || tok->previous()->str() != "enum")) { isNamespace = (tok->str() == "namespace"); hasClass = true; className = tok->next()->str(); const Token *tok1 = tok->next(); fullClassName = className; while (Token::Match(tok1, "%name% :: %name%")) { tok1 = tok1->tokAt(2); fullClassName += " :: " + tok1->str(); } } else if (hasClass && tok->str() == ";") { hasClass = false; } else if (hasClass && tok->str() == "{") { if (!isNamespace) spaceInfo.back().recordTypes.insert(fullClassName); Space info; info.isNamespace = isNamespace; info.className = className; info.bodyEnd = tok->link(); info.bodyEnd2 = tok->link(); spaceInfo.push_back(info); hasClass = false; } else if (spaceInfo.size() > 1 && tok->str() == "}" && spaceInfo.back().bodyEnd == tok) { spaceInfo.pop_back(); } continue; } // pull struct, union, enum or class definition out of typedef // use typedef name for unnamed struct, union, enum or class if (Token::Match(tok->next(), "const| struct|enum|union|class %type%| {|:")) { Token *tok1 = splitDefinitionFromTypedef(tok, &mUnnamedCount); if (!tok1) continue; tok = tok1; } /** @todo add support for union */ if (Token::Match(tok->next(), "enum %type% %type% ;") && tok->strAt(2) == tok->strAt(3)) { tok->deleteNext(3); tok->deleteThis(); if (tok->next()) tok->deleteThis(); //now the next token to process is 'tok', not 'tok->next()'; goback = true; continue; } Token *typeName; Token *typeStart = nullptr; Token *typeEnd = nullptr; Token *argStart = nullptr; Token *argEnd = nullptr; Token *arrayStart = nullptr; Token *arrayEnd = nullptr; Token *specStart = nullptr; Token *specEnd = nullptr; Token *typeDef = tok; Token *argFuncRetStart = nullptr; Token *argFuncRetEnd = nullptr; Token *funcStart = nullptr; Token *funcEnd = nullptr; Token *tokOffset = tok->next(); bool function = false; bool functionPtr = false; bool functionRetFuncPtr = false; bool functionPtrRetFuncPtr = false; bool ptrToArray = false; bool refToArray = false; bool ptrMember = false; bool typeOf = false; Token *namespaceStart = nullptr; Token *namespaceEnd = nullptr; // check for invalid input if (!tokOffset) syntaxError(tok); if (tokOffset->str() == "::") { typeStart = tokOffset; tokOffset = tokOffset->next(); while (Token::Match(tokOffset, "%type% ::")) tokOffset = tokOffset->tokAt(2); typeEnd = tokOffset; if (Token::Match(tokOffset, "%type%")) tokOffset = tokOffset->next(); } else if (Token::Match(tokOffset, "%type% ::")) { typeStart = tokOffset; do { tokOffset = tokOffset->tokAt(2); } while (Token::Match(tokOffset, "%type% ::")); typeEnd = tokOffset; if (Token::Match(tokOffset, "%type%")) tokOffset = tokOffset->next(); } else if (Token::Match(tokOffset, "%type%")) { typeStart = tokOffset; while (Token::Match(tokOffset, "const|struct|enum %type%") || (tokOffset->next() && tokOffset->next()->isStandardType())) tokOffset = tokOffset->next(); typeEnd = tokOffset; tokOffset = tokOffset->next(); while (Token::Match(tokOffset, "%type%") && (tokOffset->isStandardType() || Token::Match(tokOffset, "unsigned|signed"))) { typeEnd = tokOffset; tokOffset = tokOffset->next(); } bool atEnd = false; while (!atEnd) { if (tokOffset && tokOffset->str() == "::") { typeEnd = tokOffset; tokOffset = tokOffset->next(); } if (Token::Match(tokOffset, "%type%") && tokOffset->next() && !Token::Match(tokOffset->next(), "[|;|,|(")) { typeEnd = tokOffset; tokOffset = tokOffset->next(); } else if (Token::simpleMatch(tokOffset, "const (")) { typeEnd = tokOffset; tokOffset = tokOffset->next(); atEnd = true; } else atEnd = true; } } else continue; // invalid input // check for invalid input if (!tokOffset) syntaxError(tok); // check for template if (!isC() && tokOffset->str() == "<") { typeEnd = tokOffset->findClosingBracket(); while (typeEnd && Token::Match(typeEnd->next(), ":: %type%")) typeEnd = typeEnd->tokAt(2); if (!typeEnd) { // internal error return; } while (Token::Match(typeEnd->next(), "const|volatile")) typeEnd = typeEnd->next(); tok = typeEnd; tokOffset = tok->next(); } std::list pointers; // check for pointers and references while (Token::Match(tokOffset, "*|&|&&|const")) { pointers.push_back(tokOffset->str()); tokOffset = tokOffset->next(); } // check for invalid input if (!tokOffset) syntaxError(tok); if (tokOffset->isName() && !tokOffset->isKeyword()) { // found the type name typeName = tokOffset; tokOffset = tokOffset->next(); // check for array while (tokOffset && tokOffset->str() == "[") { if (!arrayStart) arrayStart = tokOffset; arrayEnd = tokOffset->link(); tokOffset = arrayEnd->next(); } // check for end or another if (Token::Match(tokOffset, ";|,")) tok = tokOffset; // or a function typedef else if (tokOffset && tokOffset->str() == "(") { Token *tokOffset2 = nullptr; if (Token::Match(tokOffset, "( *|%name%")) { tokOffset2 = tokOffset->next(); if (tokOffset2->str() == "typename") tokOffset2 = tokOffset2->next(); while (Token::Match(tokOffset2, "%type% ::")) tokOffset2 = tokOffset2->tokAt(2); } // unhandled typedef, skip it and continue if (typeName->str() == "void") { unsupportedTypedef(typeDef); tok = deleteInvalidTypedef(typeDef); if (tok == list.front()) //now the next token to process is 'tok', not 'tok->next()'; goback = true; continue; } // function pointer else if (Token::Match(tokOffset2, "* %name% ) (")) { // name token wasn't a name, it was part of the type typeEnd = typeEnd->next(); functionPtr = true; funcStart = funcEnd = tokOffset2; // * tokOffset = tokOffset2->tokAt(3); // ( typeName = tokOffset->tokAt(-2); argStart = tokOffset; argEnd = tokOffset->link(); tok = argEnd->next(); } // function else if (isFunctionHead(tokOffset->link(), ";,")) { function = true; if (tokOffset->link()->next()->str() == "const") { specStart = tokOffset->link()->next(); specEnd = specStart; } argStart = tokOffset; argEnd = tokOffset->link(); tok = argEnd->next(); if (specStart) tok = tok->next(); } // syntax error else syntaxError(tok); } // unhandled typedef, skip it and continue else { unsupportedTypedef(typeDef); tok = deleteInvalidTypedef(typeDef); if (tok == list.front()) //now the next token to process is 'tok', not 'tok->next()'; goback = true; continue; } } // typeof: typedef typeof ( ... ) type; else if (Token::simpleMatch(tokOffset->previous(), "typeof (") && Token::Match(tokOffset->link(), ") %type% ;")) { argStart = tokOffset; argEnd = tokOffset->link(); typeName = tokOffset->link()->next(); tok = typeName->next(); typeOf = true; } // function: typedef ... ( ... type )( ... ); // typedef ... (( ... type )( ... )); // typedef ... ( * ( ... type )( ... )); else if (tokOffset->str() == "(" && ( (tokOffset->link() && Token::Match(tokOffset->link()->previous(), "%type% ) (") && Token::Match(tokOffset->link()->next()->link(), ") const|volatile|;")) || (Token::simpleMatch(tokOffset, "( (") && tokOffset->next() && Token::Match(tokOffset->next()->link()->previous(), "%type% ) (") && Token::Match(tokOffset->next()->link()->next()->link(), ") const|volatile| ) ;|,")) || (Token::simpleMatch(tokOffset, "( * (") && tokOffset->linkAt(2) && Token::Match(tokOffset->linkAt(2)->previous(), "%type% ) (") && Token::Match(tokOffset->linkAt(2)->next()->link(), ") const|volatile| ) ;|,")))) { if (tokOffset->next()->str() == "(") tokOffset = tokOffset->next(); else if (Token::simpleMatch(tokOffset, "( * (")) { pointers.emplace_back("*"); tokOffset = tokOffset->tokAt(2); } if (tokOffset->link()->strAt(-2) == "*") functionPtr = true; else function = true; funcStart = tokOffset->next(); tokOffset = tokOffset->link(); funcEnd = tokOffset->tokAt(-2); typeName = tokOffset->previous(); argStart = tokOffset->next(); argEnd = tokOffset->next()->link(); if (!argEnd) syntaxError(argStart); tok = argEnd->next(); Token *spec = tok; if (Token::Match(spec, "const|volatile")) { specStart = spec; specEnd = spec; while (Token::Match(spec->next(), "const|volatile")) { specEnd = spec->next(); spec = specEnd; } tok = specEnd->next(); } if (!tok) syntaxError(specEnd); if (tok->str() == ")") tok = tok->next(); } else if (Token::Match(tokOffset, "( %type% (")) { function = true; if (tokOffset->link()->next()) { tok = tokOffset->link()->next(); tokOffset = tokOffset->tokAt(2); typeName = tokOffset->previous(); argStart = tokOffset; argEnd = tokOffset->link(); } else { // internal error continue; } } // pointer to function returning pointer to function else if (Token::Match(tokOffset, "( * ( * %type% ) (") && Token::simpleMatch(tokOffset->linkAt(6), ") ) (") && Token::Match(tokOffset->linkAt(6)->linkAt(2), ") ;|,")) { functionPtrRetFuncPtr = true; tokOffset = tokOffset->tokAt(6); typeName = tokOffset->tokAt(-2); argStart = tokOffset; argEnd = tokOffset->link(); if (!argEnd) syntaxError(arrayStart); argFuncRetStart = argEnd->tokAt(2); argFuncRetEnd = argFuncRetStart->link(); if (!argFuncRetEnd) syntaxError(argFuncRetStart); tok = argFuncRetEnd->next(); } // function returning pointer to function else if (Token::Match(tokOffset, "( * %type% (") && Token::simpleMatch(tokOffset->linkAt(3), ") ) (") && Token::Match(tokOffset->linkAt(3)->linkAt(2), ") ;|,")) { functionRetFuncPtr = true; tokOffset = tokOffset->tokAt(3); typeName = tokOffset->previous(); argStart = tokOffset; argEnd = tokOffset->link(); argFuncRetStart = argEnd->tokAt(2); if (!argFuncRetStart) syntaxError(tokOffset); argFuncRetEnd = argFuncRetStart->link(); if (!argFuncRetEnd) syntaxError(tokOffset); tok = argFuncRetEnd->next(); } else if (Token::Match(tokOffset, "( * ( %type% ) (")) { functionRetFuncPtr = true; tokOffset = tokOffset->tokAt(5); typeName = tokOffset->tokAt(-2); argStart = tokOffset; argEnd = tokOffset->link(); if (!argEnd) syntaxError(arrayStart); argFuncRetStart = argEnd->tokAt(2); if (!argFuncRetStart) syntaxError(tokOffset); argFuncRetEnd = argFuncRetStart->link(); if (!argFuncRetEnd) syntaxError(tokOffset); tok = argFuncRetEnd->next(); } // pointer/reference to array else if (Token::Match(tokOffset, "( *|& %type% ) [")) { ptrToArray = (tokOffset->next()->str() == "*"); refToArray = !ptrToArray; tokOffset = tokOffset->tokAt(2); typeName = tokOffset; arrayStart = tokOffset->tokAt(2); arrayEnd = arrayStart->link(); if (!arrayEnd) syntaxError(arrayStart); tok = arrayEnd->next(); } // pointer to class member else if (Token::Match(tokOffset, "( %type% :: * %type% ) ;")) { tokOffset = tokOffset->tokAt(2); namespaceStart = tokOffset->previous(); namespaceEnd = tokOffset; ptrMember = true; tokOffset = tokOffset->tokAt(2); typeName = tokOffset; tok = tokOffset->tokAt(2); } // unhandled typedef, skip it and continue else { unsupportedTypedef(typeDef); tok = deleteInvalidTypedef(typeDef); if (tok == list.front()) //now the next token to process is 'tok', not 'tok->next()'; goback = true; continue; } bool done = false; bool ok = true; TypedefInfo typedefInfo; typedefInfo.name = typeName->str(); typedefInfo.filename = list.file(typeName); typedefInfo.lineNumber = typeName->linenr(); typedefInfo.column = typeName->column(); typedefInfo.used = false; mTypedefInfo.push_back(typedefInfo); while (!done) { std::string pattern = typeName->str(); int scope = 0; bool simplifyType = false; bool inMemberFunc = false; int memberScope = 0; bool globalScope = false; int classLevel = spaceInfo.size(); bool inTypeDef = false; std::string removed; std::string classPath; for (size_t i = 1; i < spaceInfo.size(); ++i) { if (!classPath.empty()) classPath += " :: "; classPath += spaceInfo[i].className; } for (Token *tok2 = tok; tok2; tok2 = tok2->next()) { if (Settings::terminated()) return; removed.clear(); if (Token::simpleMatch(tok2, "typedef")) inTypeDef = true; if (inTypeDef && Token::simpleMatch(tok2, ";")) inTypeDef = false; // Check for variable declared with the same name if (!inTypeDef && spaceInfo.size() == 1 && Token::Match(tok2->previous(), "%name%") && !tok2->previous()->isKeyword()) { Token* varDecl = tok2; while (Token::Match(varDecl, "*|&|&&|const")) varDecl = varDecl->next(); if (Token::Match(varDecl, "%name% ;|,|)|=") && varDecl->str() == typeName->str()) { // Skip to the next closing brace if (Token::Match(varDecl, "%name% ) {")) { // is argument variable tok2 = varDecl->linkAt(2)->next(); } else { tok2 = varDecl; while (tok2 && !Token::simpleMatch(tok2, "}")) { if (Token::Match(tok2, "(|{|[")) tok2 = tok2->link(); tok2 = tok2->next(); } } if (!tok2) break; continue; } } if (tok2->link()) { // Pre-check for performance // check for end of scope if (tok2->str() == "}") { // check for end of member function if (inMemberFunc) { --memberScope; if (memberScope == 0) inMemberFunc = false; } if (classLevel > 1 && tok2 == spaceInfo[classLevel - 1].bodyEnd2) { --classLevel; pattern.clear(); for (int i = classLevel; i < spaceInfo.size(); ++i) pattern += (spaceInfo[i].className + " :: "); pattern += typeName->str(); } else { if (scope == 0) break; --scope; } } // check for member functions else if (isCPP() && tok2->str() == "(" && isFunctionHead(tok2, "{")) { const Token *func = tok2->previous(); /** @todo add support for multi-token operators */ if (func->previous()->str() == "operator") func = func->previous(); if (!func->previous()) syntaxError(func); // check for qualifier if (Token::Match(func->tokAt(-2), "%name% ::")) { int offset = -2; while (Token::Match(func->tokAt(offset - 2), "%name% ::")) offset -= 2; // check for available and matching class name if (spaceInfo.size() > 1 && classLevel < spaceInfo.size() && func->strAt(offset) == spaceInfo[classLevel].className) { memberScope = 0; inMemberFunc = true; } } } // check for entering a new scope else if (tok2->str() == "{") { // check for entering a new namespace if (isCPP() && tok2->strAt(-2) == "namespace") { if (classLevel < spaceInfo.size() && spaceInfo[classLevel].isNamespace && spaceInfo[classLevel].className == tok2->previous()->str()) { spaceInfo[classLevel].bodyEnd2 = tok2->link(); ++classLevel; pattern.clear(); for (int i = classLevel; i < spaceInfo.size(); ++i) pattern += spaceInfo[i].className + " :: "; pattern += typeName->str(); } ++scope; } // keep track of scopes within member function if (inMemberFunc) ++memberScope; ++scope; } } // check for operator typedef /** @todo add support for multi-token operators */ else if (isCPP() && tok2->str() == "operator" && tok2->next() && tok2->next()->str() == typeName->str() && tok2->linkAt(2) && tok2->strAt(2) == "(" && Token::Match(tok2->linkAt(2), ") const| {")) { // check for qualifier if (tok2->previous()->str() == "::") { // check for available and matching class name if (spaceInfo.size() > 1 && classLevel < spaceInfo.size() && tok2->strAt(-2) == spaceInfo[classLevel].className) { tok2 = tok2->next(); simplifyType = true; } } } else if (Token::Match(tok2->previous(), "class|struct %name% [:{]")) { // don't replace names in struct/class definition } // check for typedef that can be substituted else if ((tok2->isNameOnly() || (tok2->isName() && tok2->isExpandedMacro())) && (Token::simpleMatch(tok2, pattern.c_str(), pattern.size()) || (inMemberFunc && tok2->str() == typeName->str()))) { // member function class variables don't need qualification if (!(inMemberFunc && tok2->str() == typeName->str()) && pattern.find("::") != std::string::npos) { // has a "something ::" Token *start = tok2; int count = 0; int back = classLevel - 1; bool good = true; // check for extra qualification while (back >= 1) { Token *qualificationTok = start->tokAt(-2); if (!Token::Match(qualificationTok, "%type% ::")) break; if (qualificationTok->str() == spaceInfo[back].className) { start = qualificationTok; back--; count++; } else { good = false; break; } } // check global namespace if (good && back == 1 && start->strAt(-1) == "::") good = false; if (good) { // remove any extra qualification if present while (count) { if (!removed.empty()) removed.insert(0, " "); removed.insert(0, tok2->strAt(-2) + " " + tok2->strAt(-1)); tok2->tokAt(-3)->deleteNext(2); --count; } // remove global namespace if present if (tok2->strAt(-1) == "::") { removed.insert(0, ":: "); tok2->tokAt(-2)->deleteNext(); globalScope = true; } // remove qualification if present for (int i = classLevel; i < spaceInfo.size(); ++i) { if (!removed.empty()) removed += " "; removed += (tok2->str() + " " + tok2->strAt(1)); tok2->deleteThis(); tok2->deleteThis(); } simplifyType = true; } } else { if (tok2->strAt(-1) == "::") { int relativeSpaceInfoSize = spaceInfo.size(); Token * tokBeforeType = tok2->previous(); while (relativeSpaceInfoSize > 1 && tokBeforeType && tokBeforeType->str() == "::" && tokBeforeType->strAt(-1) == spaceInfo[relativeSpaceInfoSize-1].className) { tokBeforeType = tokBeforeType->tokAt(-2); --relativeSpaceInfoSize; } if (tokBeforeType && tokBeforeType->str() != "::") { Token::eraseTokens(tokBeforeType, tok2); simplifyType = true; } } else if (Token::Match(tok2->previous(), "case|;|{|} %type% :")) { tok2 = tok2->next(); } else if (duplicateTypedef(&tok2, typeName, typeDef)) { // skip to end of scope if not already there if (tok2->str() != "}") { while (tok2->next()) { if (tok2->next()->str() == "{") tok2 = tok2->linkAt(1)->previous(); else if (tok2->next()->str() == "}") break; tok2 = tok2->next(); } } } else if (Token::Match(tok2->tokAt(-2), "%type% *|&")) { // Ticket #5868: Don't substitute variable names } else if (tok2->previous()->str() != ".") { simplifyType = true; } } } if (simplifyType) { mTypedefInfo.back().used = true; // can't simplify 'operator functionPtr ()' and 'functionPtr operator ... ()' if (functionPtr && (tok2->previous()->str() == "operator" || (tok2->next() && tok2->next()->str() == "operator"))) { simplifyType = false; tok2 = tok2->next(); continue; } // There are 2 categories of typedef substitutions: // 1. variable declarations that preserve the variable name like // global, local, and function parameters // 2. not variable declarations that have no name like derived // classes, casts, operators, and template parameters // try to determine which category this substitution is bool inCast = false; bool inTemplate = false; bool inOperator = false; bool inSizeof = false; const bool sameStartEnd = (typeStart == typeEnd); // check for derived class: class A : some_typedef { const bool isDerived = Token::Match(tok2->previous(), "public|protected|private %type% {|,"); // check for cast: (some_typedef) A or static_cast(A) // todo: check for more complicated casts like: (const some_typedef *)A if ((tok2->previous()->str() == "(" && tok2->next()->str() == ")" && tok2->strAt(-2) != "sizeof") || (tok2->previous()->str() == "<" && Token::simpleMatch(tok2->next(), "> (")) || Token::Match(tok2->tokAt(-2), "( const %name% )")) inCast = true; // check for template parameters: t t1 else if (Token::Match(tok2->previous(), "<|,") && Token::Match(tok2->next(), "&|*| &|*| >|,")) inTemplate = true; else if (Token::Match(tok2->tokAt(-2), "sizeof ( %type% )")) inSizeof = true; // check for operator if (tok2->strAt(-1) == "operator" || Token::simpleMatch(tok2->tokAt(-2), "operator const")) inOperator = true; if (typeStart->str() == "typename" && tok2->strAt(-1)=="typename") { // Remove one typename if it is already contained in the goal typeStart = typeStart->next(); } // skip over class or struct in derived class declaration bool structRemoved = false; if (isDerived && Token::Match(typeStart, "class|struct")) { if (typeStart->str() == "struct") structRemoved = true; typeStart = typeStart->next(); } if (Token::Match(typeStart, "struct|class") && Token::Match(tok2, "%name% ::")) typeStart = typeStart->next(); if (sameStartEnd) typeEnd = typeStart; // start substituting at the typedef name by replacing it with the type tok2->str(typeStart->str()); // restore qualification if it was removed if (typeStart->str() == "struct" || structRemoved) { if (structRemoved) tok2 = tok2->previous(); if (globalScope) { tok2->insertToken("::"); tok2 = tok2->next(); } for (int i = classLevel; i < spaceInfo.size(); ++i) { tok2->insertToken(spaceInfo[i].className); tok2 = tok2->next(); tok2->insertToken("::"); tok2 = tok2->next(); } } // add some qualification back if needed Token *start = tok2; std::string removed1 = removed; std::string::size_type idx = removed1.rfind(" ::"); if (idx != std::string::npos) removed1.resize(idx); if (removed1 == classPath && !removed1.empty()) { for (std::vector::const_reverse_iterator it = spaceInfo.crbegin(); it != spaceInfo.crend(); ++it) { if (it->recordTypes.find(start->str()) != it->recordTypes.end()) { std::string::size_type spaceIdx = 0; std::string::size_type startIdx = 0; while ((spaceIdx = removed1.find(" ", startIdx)) != std::string::npos) { tok2->previous()->insertToken(removed1.substr(startIdx, spaceIdx - startIdx)); startIdx = spaceIdx + 1; } tok2->previous()->insertToken(removed1.substr(startIdx)); tok2->previous()->insertToken("::"); break; } idx = removed1.rfind(" ::"); if (idx == std::string::npos) break; removed1.resize(idx); } } // add remainder of type tok2 = TokenList::copyTokens(tok2, typeStart->next(), typeEnd); if (!pointers.empty()) { for (const std::string &p : pointers) { tok2->insertToken(p); tok2 = tok2->next(); } } if (funcStart && funcEnd) { tok2->insertToken("("); tok2 = tok2->next(); Token *paren = tok2; tok2 = TokenList::copyTokens(tok2, funcStart, funcEnd); if (!inCast) tok2 = processFunc(tok2, inOperator); if (!tok2) break; while (Token::Match(tok2, "%name%|] [")) tok2 = tok2->linkAt(1); tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, paren); tok2 = TokenList::copyTokens(tok2, argStart, argEnd); if (specStart) { Token *spec = specStart; tok2->insertToken(spec->str()); tok2 = tok2->next(); while (spec != specEnd) { spec = spec->next(); tok2->insertToken(spec->str()); tok2 = tok2->next(); } } } else if (functionPtr || function) { // don't add parentheses around function names because it // confuses other simplifications bool needParen = true; if (!inTemplate && function && tok2->next() && tok2->next()->str() != "*") needParen = false; if (needParen) { tok2->insertToken("("); tok2 = tok2->next(); } Token *tok3 = tok2; if (namespaceStart) { const Token *tok4 = namespaceStart; while (tok4 != namespaceEnd) { tok2->insertToken(tok4->str()); tok2 = tok2->next(); tok4 = tok4->next(); } tok2->insertToken(namespaceEnd->str()); tok2 = tok2->next(); } if (functionPtr) { tok2->insertToken("*"); tok2 = tok2->next(); } if (!inCast) tok2 = processFunc(tok2, inOperator); if (needParen) { if (!tok2) syntaxError(nullptr); tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, tok3); } if (!tok2) syntaxError(nullptr); tok2 = TokenList::copyTokens(tok2, argStart, argEnd); if (inTemplate) { if (!tok2) syntaxError(nullptr); tok2 = tok2->next(); } if (specStart) { Token *spec = specStart; tok2->insertToken(spec->str()); tok2 = tok2->next(); while (spec != specEnd) { spec = spec->next(); tok2->insertToken(spec->str()); tok2 = tok2->next(); } } } else if (functionRetFuncPtr || functionPtrRetFuncPtr) { tok2->insertToken("("); tok2 = tok2->next(); Token *tok3 = tok2; tok2->insertToken("*"); tok2 = tok2->next(); Token * tok4 = nullptr; if (functionPtrRetFuncPtr) { tok2->insertToken("("); tok2 = tok2->next(); tok4 = tok2; tok2->insertToken("*"); tok2 = tok2->next(); } // skip over variable name if there if (!inCast) { if (!tok2 || !tok2->next()) syntaxError(nullptr); if (tok2->next()->str() != ")") tok2 = tok2->next(); } if (tok4 && functionPtrRetFuncPtr) { tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, tok4); } tok2 = TokenList::copyTokens(tok2, argStart, argEnd); tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, tok3); tok2 = TokenList::copyTokens(tok2, argFuncRetStart, argFuncRetEnd); } else if (ptrToArray || refToArray) { tok2->insertToken("("); tok2 = tok2->next(); Token *tok3 = tok2; if (ptrToArray) tok2->insertToken("*"); else tok2->insertToken("&"); tok2 = tok2->next(); bool hasName = false; // skip over name if (tok2->next() && tok2->next()->str() != ")" && tok2->next()->str() != "," && tok2->next()->str() != ">") { hasName = true; if (tok2->next()->str() != "(") tok2 = tok2->next(); // check for function and skip over args if (tok2 && tok2->next() && tok2->next()->str() == "(") tok2 = tok2->next()->link(); // check for array if (tok2 && tok2->next() && tok2->next()->str() == "[") tok2 = tok2->next()->link(); } tok2->insertToken(")"); Token::createMutualLinks(tok2->next(), tok3); if (!hasName) tok2 = tok2->next(); } else if (ptrMember) { if (Token::simpleMatch(tok2, "* (")) { tok2->insertToken("*"); tok2 = tok2->next(); } else { // This is the case of casting operator. // Name is not available, and () should not be // inserted const bool castOperator = inOperator && Token::Match(tok2, "%type% ("); Token *openParenthesis = nullptr; if (!castOperator) { tok2->insertToken("("); tok2 = tok2->next(); openParenthesis = tok2; } const Token *tok4 = namespaceStart; while (tok4 != namespaceEnd) { tok2->insertToken(tok4->str()); tok2 = tok2->next(); tok4 = tok4->next(); } tok2->insertToken(namespaceEnd->str()); tok2 = tok2->next(); tok2->insertToken("*"); tok2 = tok2->next(); if (openParenthesis) { // Skip over name, if any if (Token::Match(tok2->next(), "%name%")) tok2 = tok2->next(); tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, openParenthesis); } } } else if (typeOf) { tok2 = TokenList::copyTokens(tok2, argStart, argEnd); } else if (Token::Match(tok2, "%name% [")) { while (Token::Match(tok2, "%name%|] [")) { tok2 = tok2->linkAt(1); } tok2 = tok2->previous(); } if (arrayStart && arrayEnd) { do { if (!tok2->next()) syntaxError(tok2); // can't recover so quit if (!inCast && !inSizeof && !inTemplate) tok2 = tok2->next(); if (tok2->str() == "const") tok2 = tok2->next(); // reference or pointer to array? if (Token::Match(tok2, "&|*|&&")) { tok2 = tok2->previous(); tok2->insertToken("("); Token *tok3 = tok2->next(); // handle missing variable name if (Token::Match(tok3, "( *|&|&& *|&|&& %name%")) tok2 = tok3->tokAt(3); else if (Token::Match(tok2->tokAt(3), "[(),;]")) tok2 = tok2->tokAt(2); else tok2 = tok2->tokAt(3); if (!tok2) syntaxError(nullptr); while (tok2->strAt(1) == "::") tok2 = tok2->tokAt(2); // skip over function parameters if (tok2->str() == "(") tok2 = tok2->link(); if (tok2->strAt(1) == "(") tok2 = tok2->linkAt(1); // skip over const/noexcept while (Token::Match(tok2->next(), "const|noexcept")) tok2 = tok2->next(); tok2->insertToken(")"); tok2 = tok2->next(); Token::createMutualLinks(tok2, tok3); } if (!tok2->next()) syntaxError(tok2); // can't recover so quit // skip over array dimensions while (tok2->next()->str() == "[") tok2 = tok2->linkAt(1); tok2 = TokenList::copyTokens(tok2, arrayStart, arrayEnd); if (!tok2->next()) syntaxError(tok2); if (tok2->str() == "=") { if (!tok2->next()) syntaxError(tok2); if (tok2->next()->str() == "{") tok2 = tok2->next()->link()->next(); else if (tok2->next()->str().at(0) == '\"') tok2 = tok2->tokAt(2); } } while (Token::Match(tok2, ", %name% ;|=|,")); } simplifyType = false; } if (!tok2) break; } if (!tok) syntaxError(nullptr); if (tok->str() == ";") done = true; else if (tok->str() == ",") { arrayStart = nullptr; arrayEnd = nullptr; tokOffset = tok->next(); pointers.clear(); while (Token::Match(tokOffset, "*|&")) { pointers.push_back(tokOffset->str()); tokOffset = tokOffset->next(); } if (Token::Match(tokOffset, "%type%")) { typeName = tokOffset; tokOffset = tokOffset->next(); if (tokOffset && tokOffset->str() == "[") { arrayStart = tokOffset; for (;;) { while (tokOffset->next() && !Token::Match(tokOffset->next(), ";|,")) tokOffset = tokOffset->next(); if (!tokOffset->next()) return; // invalid input else if (tokOffset->next()->str() == ";") break; else if (tokOffset->str() == "]") break; else tokOffset = tokOffset->next(); } arrayEnd = tokOffset; tokOffset = tokOffset->next(); } if (Token::Match(tokOffset, ";|,")) tok = tokOffset; else { // we encountered a typedef we don't support yet so just continue done = true; ok = false; } } else { // we encountered a typedef we don't support yet so just continue done = true; ok = false; } } else { // something is really wrong (internal error) done = true; ok = false; } } if (ok) { // remove typedef Token::eraseTokens(typeDef, tok); if (typeDef != list.front()) { tok = typeDef->previous(); tok->deleteNext(); //no need to remove last token in the list if (tok->tokAt(2)) tok->deleteNext(); } else { list.front()->deleteThis(); //no need to remove last token in the list if (list.front()->next()) list.front()->deleteThis(); tok = list.front(); //now the next token to process is 'tok', not 'tok->next()'; goback = true; } } } } namespace { struct ScopeInfo3 { enum Type { Global, Namespace, Record, MemberFunction, Other }; ScopeInfo3() : parent(nullptr), type(Global), bodyStart(nullptr), bodyEnd(nullptr) {} ScopeInfo3(ScopeInfo3 *parent_, Type type_, const std::string &name_, const Token *bodyStart_, const Token *bodyEnd_) : parent(parent_), type(type_), name(name_), bodyStart(bodyStart_), bodyEnd(bodyEnd_) { if (name.empty()) return; fullName = name; ScopeInfo3 *scope = parent; while (scope && scope->parent) { if (scope->name.empty()) break; fullName = scope->name + " :: " + fullName; scope = scope->parent; } } ScopeInfo3 *parent; std::list children; Type type; std::string fullName; std::string name; const Token * bodyStart; const Token * bodyEnd; std::set usingNamespaces; std::set recordTypes; std::set baseTypes; ScopeInfo3 *addChild(Type scopeType, const std::string &scopeName, const Token *bodyStartToken, const Token *bodyEndToken) { children.emplace_back(this, scopeType, scopeName, bodyStartToken, bodyEndToken); return &children.back(); } bool hasChild(const std::string &childName) const { for (const auto & child : children) { if (child.name == childName) return true; } return false; } const ScopeInfo3 * findInChildren(const std::string & scope) const { for (const auto & child : children) { if (child.type == Record && (child.name == scope || child.fullName == scope)) return &child; else { const ScopeInfo3 * temp = child.findInChildren(scope); if (temp) return temp; } } return nullptr; } const ScopeInfo3 * findScope(const std::string & scope) const { const ScopeInfo3 * tempScope = this; while (tempScope) { // check children for (const auto & child : tempScope->children) { if (&child != this && child.type == Record && (child.name == scope || child.fullName == scope)) return &child; } // check siblings for same name if (tempScope->parent) { for (const auto &sibling : tempScope->parent->children) { if (sibling.name == tempScope->name && &sibling != this) { const ScopeInfo3 * temp = sibling.findInChildren(scope); if (temp) return temp; } } } tempScope = tempScope->parent; } return nullptr; } bool findTypeInBase(const std::string &scope) const { // check in base types first if (baseTypes.find(scope) != baseTypes.end()) return true; // check in base types base types for (const std::string & base : baseTypes) { const ScopeInfo3 * baseScope = findScope(base); // bail on uninstantiated recursive template if (baseScope == this) return false; if (baseScope && baseScope->fullName == scope) return true; if (baseScope && baseScope->findTypeInBase(scope)) return true; } return false; } ScopeInfo3 * findScope(const ScopeInfo3 * scope) { if (scope->bodyStart == bodyStart) return this; for (auto & child : children) { ScopeInfo3 * temp = child.findScope(scope); if (temp) return temp; } return nullptr; } }; void setScopeInfo(Token *tok, ScopeInfo3 **scopeInfo, bool debug=false) { if (!tok) return; if (tok->str() == "{" && (*scopeInfo)->parent && tok == (*scopeInfo)->bodyStart) return; if (tok->str() == "}") { if ((*scopeInfo)->parent && tok == (*scopeInfo)->bodyEnd) *scopeInfo = (*scopeInfo)->parent; else { // Try to find parent scope ScopeInfo3 *parent = (*scopeInfo)->parent; while (parent && parent->bodyEnd != tok) parent = parent->parent; if (parent) { *scopeInfo = parent; if (debug) throw std::runtime_error("Internal error: unmatched }"); } } return; } if (!Token::Match(tok, "namespace|class|struct|union %name% {|:|::|<")) { // check for using namespace if (Token::Match(tok, "using namespace %name% ;|::")) { const Token * tok1 = tok->tokAt(2); std::string nameSpace; while (tok1 && tok1->str() != ";") { if (!nameSpace.empty()) nameSpace += " "; nameSpace += tok1->str(); tok1 = tok1->next(); } (*scopeInfo)->usingNamespaces.insert(nameSpace); } // check for member function else if (tok->str() == "{") { bool added = false; Token *tok1 = tok; while (Token::Match(tok1->previous(), "const|volatile|final|override|&|&&|noexcept")) tok1 = tok1->previous(); if (tok1->previous() && (tok1->strAt(-1) == ")" || tok->strAt(-1) == "}")) { tok1 = tok1->linkAt(-1); if (Token::Match(tok1->previous(), "throw|noexcept (")) { tok1 = tok1->previous(); while (Token::Match(tok1->previous(), "const|volatile|final|override|&|&&|noexcept")) tok1 = tok1->previous(); if (tok1->strAt(-1) != ")") return; tok1 = tok1->linkAt(-1); } else { while (Token::Match(tok1->tokAt(-2), ":|, %name%")) { tok1 = tok1->tokAt(-2); if (tok1->strAt(-1) != ")" && tok1->strAt(-1) != "}") return; tok1 = tok1->linkAt(-1); } } if (tok1->strAt(-1) == ">") tok1 = tok1->previous()->findOpeningBracket(); if (tok1 && (Token::Match(tok1->tokAt(-3), "%name% :: %name%") || Token::Match(tok1->tokAt(-4), "%name% :: ~ %name%"))) { tok1 = tok1->tokAt(-2); if (tok1->str() == "~") tok1 = tok1->previous(); std::string scope = tok1->strAt(-1); while (Token::Match(tok1->tokAt(-2), ":: %name%")) { scope = tok1->strAt(-3) + " :: " + scope; tok1 = tok1->tokAt(-2); } *scopeInfo = (*scopeInfo)->addChild(ScopeInfo3::MemberFunction, scope, tok, tok->link()); added = true; } } if (!added) *scopeInfo = (*scopeInfo)->addChild(ScopeInfo3::Other, "", tok, tok->link()); } return; } const bool record = Token::Match(tok, "class|struct|union %name%"); tok = tok->next(); std::string classname = tok->str(); while (Token::Match(tok, "%name% :: %name%")) { tok = tok->tokAt(2); classname += " :: " + tok->str(); } // add record type to scope info if (record) (*scopeInfo)->recordTypes.insert(classname); tok = tok->next(); // skip template parameters if (tok && tok->str() == "<") { tok = tok->findClosingBracket(); if (tok) tok = tok->next(); } // get base class types std::set baseTypes; if (tok && tok->str() == ":") { do { tok = tok->next(); while (Token::Match(tok, "public|protected|private|virtual")) tok = tok->next(); std::string base; while (tok && !Token::Match(tok, ";|,|{")) { if (!base.empty()) base += ' '; base += tok->str(); tok = tok->next(); // skip template parameters if (tok && tok->str() == "<") { tok = tok->findClosingBracket(); if (tok) tok = tok->next(); } } baseTypes.insert(base); } while (tok && !Token::Match(tok, ";|{")); } if (tok && tok->str() == "{") { *scopeInfo = (*scopeInfo)->addChild(record ? ScopeInfo3::Record : ScopeInfo3::Namespace, classname, tok, tok->link()); (*scopeInfo)->baseTypes = baseTypes; } } Token *findSemicolon(Token *tok) { int level = 0; for (; tok && (level > 0 || tok->str() != ";"); tok = tok->next()) { if (tok->str() == "{") ++level; else if (level > 0 && tok->str() == "}") --level; } return tok; } bool usingMatch( const Token *nameToken, const std::string &scope, Token **tok, const std::string &scope1, const ScopeInfo3 *currentScope, const ScopeInfo3 *memberClassScope) { Token *tok1 = *tok; if (tok1 && tok1->str() != nameToken->str()) return false; // skip this using if (tok1 == nameToken) { *tok = findSemicolon(tok1); return false; } // skip other using with this name if (tok1->strAt(-1) == "using") { // fixme: this is wrong // skip to end of scope if (currentScope->bodyEnd) *tok = currentScope->bodyEnd->previous(); return false; } if (Token::Match(tok1->tokAt(-1), "class|struct|union|enum|namespace")) { // fixme return false; } // get qualification std::string qualification; const Token* tok2 = tok1; std::string::size_type index = scope.size(); std::string::size_type new_index = std::string::npos; bool match = true; while (Token::Match(tok2->tokAt(-2), "%name% ::") && !tok2->tokAt(-2)->isKeyword()) { std::string last; if (match && !scope1.empty()) { new_index = scope1.rfind(' ', index - 1); if (new_index != std::string::npos) last = scope1.substr(new_index, index - new_index); else if (!qualification.empty()) last.clear(); else last = scope1; } else match = false; if (match && tok2->strAt(-2) == last) index = new_index; else { if (!qualification.empty()) qualification = " :: " + qualification; qualification = tok2->strAt(-2) + qualification; } tok2 = tok2->tokAt(-2); } std::string fullScope1 = scope1; if (!scope1.empty() && !qualification.empty()) fullScope1 += " :: "; fullScope1 += qualification; if (scope == fullScope1) return true; const ScopeInfo3 *scopeInfo = memberClassScope ? memberClassScope : currentScope; // check in base types if (scopeInfo->findTypeInBase(scope)) return true; // check using namespace const ScopeInfo3 * tempScope = scopeInfo; while (tempScope) { //if (!tempScope->parent->usingNamespaces.empty()) { if (!tempScope->usingNamespaces.empty()) { if (qualification.empty()) { if (tempScope->usingNamespaces.find(scope) != tempScope->usingNamespaces.end()) return true; } else { for (auto ns : tempScope->usingNamespaces) { if (scope == ns + " :: " + qualification) return true; } } } tempScope = tempScope->parent; } std::string newScope1 = scope1; // scopes didn't match so try higher scopes index = newScope1.size(); while (!newScope1.empty()) { std::string::size_type separator = newScope1.rfind(" :: ", index - 1); if (separator != std::string::npos) newScope1 = newScope1.substr(0, separator); else newScope1.clear(); std::string newFullScope1 = newScope1; if (!newScope1.empty() && !qualification.empty()) newFullScope1 += " :: "; newFullScope1 += qualification; if (scope == newFullScope1) return true; } return false; } std::string memberFunctionScope(const Token *tok) { std::string qualification; const Token *qualTok = tok->strAt(-2) == "~" ? tok->tokAt(-4) : tok->tokAt(-3); while (Token::Match(qualTok, "%type% ::")) { if (!qualification.empty()) qualification = " :: " + qualification; qualification = qualTok->str() + qualification; qualTok = qualTok->tokAt(-2); } return qualification; } const Token * memberFunctionEnd(const Token *tok) { if (tok->str() != "(") return nullptr; const Token *end = tok->link()->next(); while (end) { if (end->str() == "{" && !Token::Match(end->tokAt(-2), ":|, %name%")) return end; else if (end->str() == ";") break; end = end->next(); } return nullptr; } } // namespace bool Tokenizer::isMemberFunction(const Token *openParen) const { return (Token::Match(openParen->tokAt(-2), ":: %name% (") || Token::Match(openParen->tokAt(-3), ":: ~ %name% (")) && isFunctionHead(openParen, "{|:"); } static bool scopesMatch(const std::string &scope1, const std::string &scope2, const ScopeInfo3 *globalScope) { if (scope1.empty() || scope2.empty()) return false; // check if scopes match if (scope1 == scope2) return true; // check if scopes only differ by global qualification if (scope1 == (":: " + scope2)) { std::string::size_type end = scope2.find_first_of(' '); if (end == std::string::npos) end = scope2.size(); if (globalScope->hasChild(scope2.substr(0, end))) return true; } else if (scope2 == (":: " + scope1)) { std::string::size_type end = scope1.find_first_of(' '); if (end == std::string::npos) end = scope1.size(); if (globalScope->hasChild(scope1.substr(0, end))) return true; } return false; } bool Tokenizer::simplifyUsing() { if (!isCPP() || mSettings->standards.cpp < Standards::CPP11) return false; bool substitute = false; ScopeInfo3 scopeInfo; ScopeInfo3 *currentScope = &scopeInfo; struct Using { Using(Token *start, Token *end) : startTok(start), endTok(end) {} Token *startTok; Token *endTok; }; std::list usingList; for (Token *tok = list.front(); tok; tok = tok->next()) { if (mErrorLogger && !list.getFiles().empty()) mErrorLogger->reportProgress(list.getFiles()[0], "Tokenize (using)", tok->progressValue()); if (Settings::terminated()) return substitute; if (Token::Match(tok, "enum class|struct")) { Token *bodyStart = tok; while (Token::Match(bodyStart, "%name%|:|::|<")) { if (bodyStart->str() == "<") bodyStart = bodyStart->findClosingBracket(); bodyStart = bodyStart ? bodyStart->next() : nullptr; } if (Token::simpleMatch(bodyStart, "{")) tok = bodyStart->link(); continue; } if (Token::Match(tok, "{|}|namespace|class|struct|union") || Token::Match(tok, "using namespace %name% ;|::")) { try { setScopeInfo(tok, ¤tScope, mSettings->debugwarnings); } catch (const std::runtime_error &) { reportError(tok, Severity::debug, "simplifyUsingUnmatchedBodyEnd", "simplifyUsing: unmatched body end"); } continue; } // skip template declarations if (Token::Match(tok, "template < !!>")) { // add template record type to scope info const Token *end = tok->next()->findClosingBracket(); if (end && Token::Match(end->next(), "class|struct|union %name%")) currentScope->recordTypes.insert(end->strAt(2)); Token *declEndToken = TemplateSimplifier::findTemplateDeclarationEnd(tok); if (declEndToken) tok = declEndToken; continue; } // look for non-template type aliases if (!(tok->strAt(-1) != ">" && (Token::Match(tok, "using %name% = ::| %name%") || (Token::Match(tok, "using %name% [ [") && Token::Match(tok->linkAt(2), "] ] = ::| %name%"))))) continue; std::string name = tok->strAt(1); const Token *nameToken = tok->next(); std::string scope = currentScope->fullName; Token *usingStart = tok; Token *start; if (tok->strAt(2) == "=") start = tok->tokAt(3); else start = tok->linkAt(2)->tokAt(3); Token *usingEnd = findSemicolon(start); if (!usingEnd) continue; // Move struct defined in using out of using. // using T = struct t { }; => struct t { }; using T = struct t; // fixme: this doesn't handle attributes if (Token::Match(start, "class|struct|union|enum %name%| {|:")) { Token *structEnd = start->tokAt(1); const bool hasName = Token::Match(structEnd, "%name%"); // skip over name if present if (hasName) structEnd = structEnd->next(); // skip over base class information if (structEnd->str() == ":") { structEnd = structEnd->next(); // skip over ":" while (structEnd && structEnd->str() != "{") structEnd = structEnd->next(); if (!structEnd) continue; } // use link to go to end structEnd = structEnd->link(); // add ';' after end of struct structEnd->insertToken(";", ""); // add name for anonymous struct if (!hasName) { std::string newName; if (structEnd->strAt(2) == ";") newName = name; else newName = "Unnamed" + MathLib::toString(mUnnamedCount++); TokenList::copyTokens(structEnd->next(), tok, start); structEnd->tokAt(5)->insertToken(newName, ""); start->insertToken(newName, ""); } else TokenList::copyTokens(structEnd->next(), tok, start->next()); // add using after end of struct usingStart = structEnd->tokAt(2); nameToken = usingStart->next(); if (usingStart->strAt(2) == "=") start = usingStart->tokAt(3); else start = usingStart->linkAt(2)->tokAt(3); usingEnd = findSemicolon(start); // delete original using before struct tok->deleteThis(); tok->deleteThis(); tok->deleteThis(); tok = usingStart; } // remove 'typename' and 'template' else if (start->str() == "typename") { start->deleteThis(); Token *temp = start; while (Token::Match(temp, "%name% ::")) temp = temp->tokAt(2); if (Token::Match(temp, "template %name%")) temp->deleteThis(); } if (usingEnd) tok = usingEnd; // Unfortunately we have to start searching from the beginning // of the token stream because templates are instantiated at // the end of the token stream and it may be used before then. ScopeInfo3 scopeInfo1; ScopeInfo3 *currentScope1 = &scopeInfo1; Token *startToken = list.front(); Token *endToken = nullptr; bool inMemberFunc = false; const ScopeInfo3 * memberFuncScope = nullptr; const Token * memberFuncEnd = nullptr; // We can limit the search to the current function when the type alias // is defined in that function. if (currentScope->type == ScopeInfo3::Other || currentScope->type == ScopeInfo3::MemberFunction) { scopeInfo1 = scopeInfo; currentScope1 = scopeInfo1.findScope(currentScope); if (!currentScope1) return substitute; // something bad happened startToken = usingEnd->next(); endToken = currentScope->bodyEnd->next(); if (currentScope->type == ScopeInfo3::MemberFunction) { const ScopeInfo3 * temp = currentScope->findScope(currentScope->fullName); if (temp) { inMemberFunc = true; memberFuncScope = temp; memberFuncEnd = endToken; } } } std::string scope1 = currentScope1->fullName; bool skip = false; // don't erase type aliases we can't parse Token *enumOpenBrace = nullptr; for (Token* tok1 = startToken; !skip && tok1 && tok1 != endToken; tok1 = tok1->next()) { // skip enum body if (tok1 && tok1 == enumOpenBrace) { tok1 = tok1->link(); enumOpenBrace = nullptr; continue; } if ((Token::Match(tok1, "{|}|namespace|class|struct|union") && tok1->strAt(-1) != "using") || Token::Match(tok1, "using namespace %name% ;|::")) { try { setScopeInfo(tok1, ¤tScope1, mSettings->debugwarnings); } catch (const std::runtime_error &) { reportError(tok1, Severity::debug, "simplifyUsingUnmatchedBodyEnd", "simplifyUsing: unmatched body end"); } scope1 = currentScope1->fullName; if (inMemberFunc && memberFuncEnd && tok1 == memberFuncEnd) { inMemberFunc = false; memberFuncScope = nullptr; memberFuncEnd = nullptr; } continue; } // skip template definitions if (Token::Match(tok1, "template < !!>")) { Token *declEndToken = TemplateSimplifier::findTemplateDeclarationEnd(tok1); if (declEndToken) tok1 = declEndToken; continue; } // check for enum with body if (tok1->str() == "enum") { if (Token::Match(tok1, "enum class|struct")) tok1 = tok1->next(); Token *defStart = tok1; while (Token::Match(defStart, "%name%|::|:")) defStart = defStart->next(); if (Token::simpleMatch(defStart, "{")) enumOpenBrace = defStart; continue; } // check for member function and adjust scope if (isMemberFunction(tok1)) { if (!scope1.empty()) scope1 += " :: "; scope1 += memberFunctionScope(tok1); const ScopeInfo3 * temp = currentScope1->findScope(scope1); if (temp) { const Token *end = memberFunctionEnd(tok1); if (end) { inMemberFunc = true; memberFuncScope = temp; memberFuncEnd = end; } } continue; } else if (inMemberFunc && memberFuncScope) { if (!usingMatch(nameToken, scope, &tok1, scope1, currentScope1, memberFuncScope)) continue; } else if (!usingMatch(nameToken, scope, &tok1, scope1, currentScope1, nullptr)) continue; // remove the qualification std::string fullScope = scope; std::string removed; while (Token::Match(tok1->tokAt(-2), "%name% ::") && !tok1->tokAt(-2)->isKeyword()) { removed = (tok1->strAt(-2) + " :: ") + removed; if (fullScope == tok1->strAt(-2)) { tok1->deletePrevious(); tok1->deletePrevious(); break; } else { const std::string::size_type idx = fullScope.rfind(" "); if (idx == std::string::npos) break; if (tok1->strAt(-2) == fullScope.substr(idx + 1)) { tok1->deletePrevious(); tok1->deletePrevious(); fullScope.resize(idx - 3); } else break; } } // remove global namespace if present if (tok1->strAt(-1) == "::") { removed.insert(0, ":: "); tok1->deletePrevious(); } Token * arrayStart = nullptr; // parse the type Token *type = start; if (type->str() == "::") { type = type->next(); while (Token::Match(type, "%type% ::")) type = type->tokAt(2); if (Token::Match(type, "%type%")) type = type->next(); } else if (Token::Match(type, "%type% ::")) { do { type = type->tokAt(2); } while (Token::Match(type, "%type% ::")); if (Token::Match(type, "%type%")) type = type->next(); } else if (Token::Match(type, "%type%")) { while (Token::Match(type, "const|class|struct|union|enum %type%") || (type->next() && type->next()->isStandardType())) type = type->next(); type = type->next(); while (Token::Match(type, "%type%") && (type->isStandardType() || Token::Match(type, "unsigned|signed"))) { type = type->next(); } bool atEnd = false; while (!atEnd) { if (type && type->str() == "::") { type = type->next(); } if (Token::Match(type, "%type%") && type->next() && !Token::Match(type->next(), "[|,|(")) { type = type->next(); } else if (Token::simpleMatch(type, "const (")) { type = type->next(); atEnd = true; } else atEnd = true; } } else syntaxError(type); // check for invalid input if (!type) syntaxError(tok1); // check for template if (type->str() == "<") { type = type->findClosingBracket(); while (type && Token::Match(type->next(), ":: %type%")) type = type->tokAt(2); if (!type) { syntaxError(tok1); } while (Token::Match(type->next(), "const|volatile")) type = type->next(); type = type->next(); } // check for pointers and references std::list pointers; while (Token::Match(type, "*|&|&&|const")) { pointers.push_back(type->str()); type = type->next(); } // check for array if (type && type->str() == "[") { do { if (!arrayStart) arrayStart = type; bool atEnd = false; while (!atEnd) { while (type->next() && !Token::Match(type->next(), ";|,")) { type = type->next(); } if (!type->next()) syntaxError(type); // invalid input else if (type->next()->str() == ";") atEnd = true; else if (type->str() == "]") atEnd = true; else type = type->next(); } type = type->next(); } while (type && type->str() == "["); } // make sure we are in a good state if (!tok1 || !tok1->next()) break; // bail Token* after = tok1->next(); // check if type was parsed if (type && type == usingEnd) { // check for array syntax and add type around variable if (arrayStart) { if (Token::Match(tok1->next(), "%name%")) { TokenList::copyTokens(tok1->next(), arrayStart, usingEnd->previous()); TokenList::copyTokens(tok1, start, arrayStart->previous()); tok1->deleteThis(); substitute = true; } } else { // add some qualification back if needed std::string removed1 = removed; std::string::size_type idx = removed1.rfind(" ::"); if (idx != std::string::npos) removed1.resize(idx); if (scopesMatch(removed1, scope, &scopeInfo1)) { ScopeInfo3 * tempScope = currentScope; while (tempScope->parent) { if (tempScope->recordTypes.find(start->str()) != tempScope->recordTypes.end()) { std::string::size_type spaceIdx = 0; std::string::size_type startIdx = 0; while ((spaceIdx = removed1.find(" ", startIdx)) != std::string::npos) { tok1->previous()->insertToken(removed1.substr(startIdx, spaceIdx - startIdx)); startIdx = spaceIdx + 1; } tok1->previous()->insertToken(removed1.substr(startIdx)); tok1->previous()->insertToken("::"); break; } idx = removed1.rfind(" ::"); if (idx == std::string::npos) break; removed1.resize(idx); tempScope = tempScope->parent; } } // just replace simple type aliases TokenList::copyTokens(tok1, start, usingEnd->previous()); tok1->deleteThis(); substitute = true; } } else { skip = true; if (mSettings->debugwarnings && mErrorLogger) { std::string str; for (Token *tok3 = usingStart; tok3 && tok3 != usingEnd; tok3 = tok3->next()) { if (!str.empty()) str += ' '; str += tok3->str(); } str += " ;"; std::list callstack(1, usingStart); mErrorLogger->reportErr(ErrorMessage(callstack, &list, Severity::debug, "simplifyUsing", "Failed to parse \'" + str + "\'. The checking continues anyway.", Certainty::normal)); } } tok1 = after; } if (!skip) usingList.emplace_back(usingStart, usingEnd); } // delete all used type alias definitions for (std::list::reverse_iterator it = usingList.rbegin(); it != usingList.rend(); ++it) { Token *usingStart = it->startTok; Token *usingEnd = it->endTok; if (usingStart->previous()) { if (usingEnd->next()) Token::eraseTokens(usingStart->previous(), usingEnd->next()); else { Token::eraseTokens(usingStart->previous(), usingEnd); usingEnd->deleteThis(); } } else { if (usingEnd->next()) { Token::eraseTokens(usingStart, usingEnd->next()); usingStart->deleteThis(); } else { // this is the only code being checked so leave ';' Token::eraseTokens(usingStart, usingEnd); usingStart->deleteThis(); } } } return substitute; } void Tokenizer::simplifyMulAndParens() { if (!list.front()) return; for (Token *tok = list.front()->tokAt(3); tok; tok = tok->next()) { if (!tok->isName()) continue; //fix ticket #2784 - improved by ticket #3184 int closedPars = 0; Token *tokend = tok->next(); Token *tokbegin = tok->previous(); while (tokend && tokend->str() == ")") { ++closedPars; tokend = tokend->next(); } if (!tokend || !(tokend->isAssignmentOp())) continue; while (Token::Match(tokbegin, "&|(")) { if (tokbegin->str() == "&") { if (Token::Match(tokbegin->tokAt(-2), "[;{}&(] *")) { //remove '* &' tokbegin = tokbegin->tokAt(-2); tokbegin->deleteNext(2); } else if (Token::Match(tokbegin->tokAt(-3), "[;{}&(] * (")) { if (closedPars == 0) break; --closedPars; //remove ')' tok->deleteNext(); //remove '* ( &' tokbegin = tokbegin->tokAt(-3); tokbegin->deleteNext(3); } else break; } else if (tokbegin->str() == "(") { if (closedPars == 0) break; //find consecutive opening parentheses int openPars = 0; while (tokbegin && tokbegin->str() == "(" && openPars <= closedPars) { ++openPars; tokbegin = tokbegin->previous(); } if (!tokbegin || openPars > closedPars) break; if ((openPars == closedPars && Token::Match(tokbegin, "[;{}]")) || Token::Match(tokbegin->tokAt(-2), "[;{}&(] * &") || Token::Match(tokbegin->tokAt(-3), "[;{}&(] * ( &")) { //remove the excessive parentheses around the variable while (openPars > 0) { tok->deleteNext(); tokbegin->deleteNext(); --closedPars; --openPars; } } else break; } } } } bool Tokenizer::createTokens(std::istream &code, const std::string& FileName) { // make sure settings specified assert(mSettings); return list.createTokens(code, FileName); } void Tokenizer::createTokens(simplecpp::TokenList&& tokenList) { // make sure settings specified assert(mSettings); list.createTokens(std::move(tokenList)); } bool Tokenizer::simplifyTokens1(const std::string &configuration) { // Fill the map mTypeSize.. fillTypeSizes(); mConfiguration = configuration; if (!simplifyTokenList1(list.getFiles().front().c_str())) return false; if (mTimerResults) { Timer t("Tokenizer::simplifyTokens1::createAst", mSettings->showtime, mTimerResults); list.createAst(); list.validateAst(); } else { list.createAst(); list.validateAst(); } if (mTimerResults) { Timer t("Tokenizer::simplifyTokens1::createSymbolDatabase", mSettings->showtime, mTimerResults); createSymbolDatabase(); } else { createSymbolDatabase(); } if (mTimerResults) { Timer t("Tokenizer::simplifyTokens1::setValueType", mSettings->showtime, mTimerResults); mSymbolDatabase->setValueTypeInTokenList(true); } else { mSymbolDatabase->setValueTypeInTokenList(true); } if (!mSettings->buildDir.empty()) Summaries::create(this, configuration); // TODO: do not run valueflow if no checks are being performed at all - e.g. unusedFunctions only const char* disableValueflowEnv = std::getenv("DISABLE_VALUEFLOW"); const bool doValueFlow = !disableValueflowEnv || (std::strcmp(disableValueflowEnv, "1") != 0); if (doValueFlow) { if (mTimerResults) { Timer t("Tokenizer::simplifyTokens1::ValueFlow", mSettings->showtime, mTimerResults); ValueFlow::setValues(&list, mSymbolDatabase, mErrorLogger, mSettings); } else { ValueFlow::setValues(&list, mSymbolDatabase, mErrorLogger, mSettings); } } // Warn about unhandled character literals if (mSettings->severity.isEnabled(Severity::portability)) { for (const Token *tok = tokens(); tok; tok = tok->next()) { if (tok->tokType() == Token::eChar && tok->values().empty()) { try { simplecpp::characterLiteralToLL(tok->str()); } catch (const std::exception &e) { unhandledCharLiteral(tok, e.what()); } } } } if (doValueFlow) { mSymbolDatabase->setArrayDimensionsUsingValueFlow(); } printDebugOutput(1); return true; } bool Tokenizer::tokenize(std::istream &code, const char FileName[], const std::string &configuration) { if (!createTokens(code, FileName)) return false; return simplifyTokens1(configuration); } //--------------------------------------------------------------------------- void Tokenizer::findComplicatedSyntaxErrorsInTemplates() { validate(); mTemplateSimplifier->checkComplicatedSyntaxErrorsInTemplates(); } void Tokenizer::checkForEnumsWithTypedef() { for (const Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "enum %name% {")) { tok = tok->tokAt(2); const Token *tok2 = Token::findsimplematch(tok, "typedef", tok->link()); if (tok2) syntaxError(tok2); tok = tok->link(); } } } void Tokenizer::fillTypeSizes() { mTypeSize.clear(); mTypeSize["char"] = 1; mTypeSize["_Bool"] = mSettings->sizeof_bool; mTypeSize["bool"] = mSettings->sizeof_bool; mTypeSize["short"] = mSettings->sizeof_short; mTypeSize["int"] = mSettings->sizeof_int; mTypeSize["long"] = mSettings->sizeof_long; mTypeSize["float"] = mSettings->sizeof_float; mTypeSize["double"] = mSettings->sizeof_double; mTypeSize["wchar_t"] = mSettings->sizeof_wchar_t; mTypeSize["size_t"] = mSettings->sizeof_size_t; mTypeSize["*"] = mSettings->sizeof_pointer; } void Tokenizer::combineOperators() { const bool cpp = isCPP(); // Combine tokens.. for (Token *tok = list.front(); tok && tok->next(); tok = tok->next()) { const char c1 = tok->str()[0]; if (tok->str().length() == 1 && tok->next()->str().length() == 1) { const char c2 = tok->next()->str()[0]; // combine +-*/ and = if (c2 == '=' && (std::strchr("+-*/%|^=!<>", c1))) { // skip templates if (cpp && (tok->str() == ">" || Token::simpleMatch(tok->previous(), "> *"))) { const Token* opening = tok->str() == ">" ? tok->findOpeningBracket() : tok->previous()->findOpeningBracket(); if (opening && Token::Match(opening->previous(), "%name%")) continue; } tok->str(tok->str() + c2); tok->deleteNext(); continue; } } else if (tok->next()->str() == "=") { if (tok->str() == ">>") { tok->str(">>="); tok->deleteNext(); } else if (tok->str() == "<<") { tok->str("<<="); tok->deleteNext(); } } else if (cpp && (c1 == 'p' || c1 == '_') && Token::Match(tok, "private|protected|public|__published : !!:")) { bool simplify = false; int par = 0; for (const Token *prev = tok->previous(); prev; prev = prev->previous()) { if (prev->str() == ")") { ++par; } else if (prev->str() == "(") { if (par == 0U) break; --par; } if (par != 0U || prev->str() == "(") continue; if (Token::Match(prev, "[;{}]")) { simplify = true; break; } if (prev->isName() && prev->isUpperCaseName()) continue; if (prev->isName() && endsWith(prev->str(), ':')) simplify = true; break; } if (simplify) { tok->str(tok->str() + ":"); tok->deleteNext(); } } else if (tok->str() == "->") { // If the preceding sequence is "( & %name% )", replace it by "%name%" Token *t = tok->tokAt(-4); if (Token::Match(t, "( & %name% )") && !Token::simpleMatch(t->previous(), ">")) { t->deleteThis(); t->deleteThis(); t->deleteNext(); tok->str("."); } else { tok->str("."); tok->originalName("->"); } } } } void Tokenizer::combineStringAndCharLiterals() { // Combine strings for (Token *tok = list.front(); tok; tok = tok->next()) { if (!isStringLiteral(tok->str())) continue; tok->str(simplifyString(tok->str())); while (Token::Match(tok->next(), "%str%") || Token::Match(tok->next(), "_T|_TEXT|TEXT ( %str% )")) { if (tok->next()->isName()) { if (!mSettings->isWindowsPlatform()) break; tok->deleteNext(2); tok->next()->deleteNext(); } // Two strings after each other, combine them tok->concatStr(simplifyString(tok->next()->str())); tok->deleteNext(); } } } void Tokenizer::concatenateNegativeNumberAndAnyPositive() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "?|:|,|(|[|{|return|case|sizeof|%op% +|-") || tok->tokType() == Token::eIncDecOp) continue; while (tok->str() != ">" && tok->next() && tok->next()->str() == "+") tok->deleteNext(); if (Token::Match(tok->next(), "- %num%")) { tok->deleteNext(); tok->next()->str("-" + tok->next()->str()); } } } void Tokenizer::simplifyExternC() { if (isC()) return; // Add attributes to all tokens within `extern "C"` inlines and blocks, and remove the `extern "C"` tokens. for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "extern \"C\"")) { Token *tok2 = tok->next(); if (tok->strAt(2) == "{") { tok2 = tok2->next(); // skip { while ((tok2 = tok2->next()) && tok2 != tok->linkAt(2)) tok2->isExternC(true); tok->linkAt(2)->deleteThis(); // } tok->deleteNext(2); // "C" { } else { while ((tok2 = tok2->next()) && !Token::simpleMatch(tok2, ";")) tok2->isExternC(true); tok->deleteNext(); // "C" } tok->deleteThis(); // extern } } } void Tokenizer::simplifyRoundCurlyParentheses() { for (Token *tok = list.front(); tok; tok = tok->next()) { while (Token::Match(tok, "[;{}:] ( {") && Token::simpleMatch(tok->linkAt(2), "} ) ;")) { if (tok->str() == ":" && !Token::Match(tok->tokAt(-2),"[;{}] %type% :")) break; Token *end = tok->linkAt(2)->tokAt(-3); if (Token::Match(end, "[;{}] %num%|%str% ;")) end->deleteNext(2); tok->linkAt(2)->previous()->deleteNext(3); tok->deleteNext(2); } if (Token::Match(tok, "( { %bool%|%char%|%num%|%str%|%name% ; } )")) { tok->deleteNext(); tok->deleteThis(); tok->deleteNext(3); } } } void Tokenizer::simplifySQL() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::simpleMatch(tok, "__CPPCHECK_EMBEDDED_SQL_EXEC__ SQL")) continue; const Token *end = findSQLBlockEnd(tok); if (end == nullptr) syntaxError(nullptr); const std::string instruction = tok->stringifyList(end); // delete all tokens until the embedded SQL block end Token::eraseTokens(tok, end); // insert "asm ( "instruction" ) ;" tok->str("asm"); // it can happen that 'end' is NULL when wrong code is inserted if (!tok->next()) tok->insertToken(";"); tok->insertToken(")"); tok->insertToken("\"" + instruction + "\""); tok->insertToken("("); // jump to ';' and continue tok = tok->tokAt(3); } } void Tokenizer::simplifyArrayAccessSyntax() { // 0[a] -> a[0] for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->isNumber() && Token::Match(tok, "%num% [ %name% ]")) { const std::string number(tok->str()); Token* indexTok = tok->tokAt(2); tok->str(indexTok->str()); tok->varId(indexTok->varId()); indexTok->str(number); } } } void Tokenizer::simplifyRedundantConsecutiveBraces() { // Remove redundant consecutive braces, i.e. '.. { { .. } } ..' -> '.. { .. } ..'. for (Token *tok = list.front(); tok;) { if (Token::simpleMatch(tok, "= {")) { tok = tok->linkAt(1); } else if (Token::simpleMatch(tok, "{ {") && Token::simpleMatch(tok->next()->link(), "} }")) { //remove internal parentheses tok->next()->link()->deleteThis(); tok->deleteNext(); } else tok = tok->next(); } } void Tokenizer::simplifyDoublePlusAndDoubleMinus() { // Convert - - into + and + - into - for (Token *tok = list.front(); tok; tok = tok->next()) { while (tok->next()) { if (tok->str() == "+") { if (tok->next()->str()[0] == '-') { tok = tok->next(); if (tok->str().size() == 1) { tok = tok->previous(); tok->str("-"); tok->deleteNext(); } else if (tok->isNumber()) { tok->str(tok->str().substr(1)); tok = tok->previous(); tok->str("-"); } continue; } } else if (tok->str() == "-") { if (tok->next()->str()[0] == '-') { tok = tok->next(); if (tok->str().size() == 1) { tok = tok->previous(); tok->str("+"); tok->deleteNext(); } else if (tok->isNumber()) { tok->str(tok->str().substr(1)); tok = tok->previous(); tok->str("+"); } continue; } } break; } } } /** Specify array size if it hasn't been given */ void Tokenizer::arraySize() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName() || !Token::Match(tok, "%var% [ ] =")) continue; bool addlength = false; if (Token::Match(tok, "%var% [ ] = { %str% } ;")) { Token *t = tok->tokAt(3); t->deleteNext(); t->next()->deleteNext(); addlength = true; } if (addlength || Token::Match(tok, "%var% [ ] = %str% ;")) { tok = tok->next(); const int sz = Token::getStrArraySize(tok->tokAt(3)); tok->insertToken(MathLib::toString(sz)); tok = tok->tokAt(5); } else if (Token::Match(tok, "%var% [ ] = {")) { MathLib::biguint sz = 1; tok = tok->next(); Token *end = tok->linkAt(3); for (Token *tok2 = tok->tokAt(4); tok2 && tok2 != end; tok2 = tok2->next()) { if (tok2->link() && Token::Match(tok2, "{|(|[|<")) { if (tok2->str() == "[" && tok2->link()->strAt(1) == "=") { // designated initializer if (Token::Match(tok2, "[ %num% ]")) sz = std::max(sz, MathLib::toULongNumber(tok2->strAt(1)) + 1U); else { sz = 0; break; } } tok2 = tok2->link(); } else if (tok2->str() == ",") { if (!Token::Match(tok2->next(), "[},]")) ++sz; else { tok2 = tok2->previous(); tok2->deleteNext(); } } } if (sz != 0) tok->insertToken(MathLib::toString(sz)); tok = end->next() ? end->next() : end; } } } static Token *skipTernaryOp(Token *tok) { int colonLevel = 1; while (nullptr != (tok = tok->next())) { if (tok->str() == "?") { ++colonLevel; } else if (tok->str() == ":") { --colonLevel; if (colonLevel == 0) { tok = tok->next(); break; } } if (tok->link() && Token::Match(tok, "[(<]")) tok = tok->link(); else if (Token::Match(tok->next(), "[{};)]")) break; } if (colonLevel > 0) // Ticket #5214: Make sure the ':' matches the proper '?' return nullptr; return tok; } // Skips until the colon at the end of the case label, the argument must point to the "case" token. // In case of success returns the colon token. // In case of failure returns the token that caused the error. static Token *skipCaseLabel(Token *tok) { assert(tok->str() == "case"); while (nullptr != (tok = tok->next())) { if (Token::Match(tok, "(|[")) tok = tok->link(); else if (tok->str() == "?") { Token * tok1 = skipTernaryOp(tok); if (!tok1) return tok; tok = tok1; } if (Token::Match(tok, "[:{};]")) return tok; } return nullptr; } const Token * Tokenizer::startOfExecutableScope(const Token * tok) { if (tok->str() != ")") return nullptr; tok = isFunctionHead(tok, ":{", true); if (Token::Match(tok, ": %name% [({]")) { while (Token::Match(tok, "[:,] %name% [({]")) tok = tok->linkAt(2)->next(); } return (tok && tok->str() == "{") ? tok : nullptr; } /** simplify labels and case|default in the code: add a ";" if not already in.*/ void Tokenizer::simplifyLabelsCaseDefault() { const bool cpp = isCPP(); bool executablescope = false; int indentLevel = 0; for (Token *tok = list.front(); tok; tok = tok->next()) { // Simplify labels in the executable scope.. Token *start = const_cast(startOfExecutableScope(tok)); if (start) { tok = start; executablescope = true; } if (!executablescope) continue; if (tok->str() == "{") { if (tok->previous()->str() == "=") tok = tok->link(); else ++indentLevel; } else if (tok->str() == "}") { --indentLevel; if (indentLevel == 0) { executablescope = false; continue; } } else if (Token::Match(tok, "(|[")) tok = tok->link(); if (Token::Match(tok, "[;{}:] case")) { tok = skipCaseLabel(tok->next()); if (!tok) break; if (tok->str() != ":" || tok->strAt(-1) == "case" || !tok->next()) syntaxError(tok); if (tok->next()->str() != ";" && tok->next()->str() != "case") tok->insertToken(";"); else tok = tok->previous(); } else if (Token::Match(tok, "[;{}] %name% : !!;")) { if (!cpp || !Token::Match(tok->next(), "class|struct|enum")) { tok = tok->tokAt(2); tok->insertToken(";"); } } } } void Tokenizer::simplifyCaseRange() { for (Token* tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "case %num%|%char% ... %num%|%char% :")) { const MathLib::bigint start = MathLib::toLongNumber(tok->strAt(1)); MathLib::bigint end = MathLib::toLongNumber(tok->strAt(3)); end = std::min(start + 50, end); // Simplify it 50 times at maximum if (start < end) { tok = tok->tokAt(2); tok->str(":"); tok->insertToken("case"); for (MathLib::bigint i = end-1; i > start; i--) { tok->insertToken(":"); tok->insertToken(MathLib::toString(i)); tok->insertToken("case"); } } } } } void Tokenizer::calculateScopes() { for (auto *tok = list.front(); tok; tok = tok->next()) tok->scopeInfo(nullptr); std::string nextScopeNameAddition; std::shared_ptr primaryScope = std::make_shared("", nullptr); list.front()->scopeInfo(primaryScope); for (Token* tok = list.front(); tok; tok = tok->next()) { if (tok == list.front() || !tok->scopeInfo()) { if (tok != list.front()) tok->scopeInfo(tok->previous()->scopeInfo()); if (Token::Match(tok, "using namespace %name% ::|<|;")) { std::string usingNamespaceName; for (const Token* namespaceNameToken = tok->tokAt(2); namespaceNameToken && namespaceNameToken->str() != ";"; namespaceNameToken = namespaceNameToken->next()) { usingNamespaceName += namespaceNameToken->str(); usingNamespaceName += " "; } if (usingNamespaceName.length() > 0) usingNamespaceName = usingNamespaceName.substr(0, usingNamespaceName.length() - 1); tok->scopeInfo()->usingNamespaces.insert(usingNamespaceName); } else if (Token::Match(tok, "namespace|class|struct|union %name% {|::|:|<")) { for (Token* nameTok = tok->next(); nameTok && !Token::Match(nameTok, "{|:"); nameTok = nameTok->next()) { if (Token::Match(nameTok, ";|<")) { nextScopeNameAddition = ""; break; } nextScopeNameAddition.append(nameTok->str()); nextScopeNameAddition.append(" "); } if (nextScopeNameAddition.length() > 0) nextScopeNameAddition = nextScopeNameAddition.substr(0, nextScopeNameAddition.length() - 1); } if (Token::simpleMatch(tok, "{")) { // This might be the opening of a member function Token *tok1 = tok; while (Token::Match(tok1->previous(), "const|volatile|final|override|&|&&|noexcept")) tok1 = tok1->previous(); if (tok1->previous() && tok1->strAt(-1) == ")") { bool member = true; tok1 = tok1->linkAt(-1); if (Token::Match(tok1->previous(), "throw|noexcept")) { tok1 = tok1->previous(); while (Token::Match(tok1->previous(), "const|volatile|final|override|&|&&|noexcept")) tok1 = tok1->previous(); if (tok1->strAt(-1) != ")") member = false; } else if (Token::Match(tok->tokAt(-2), ":|, %name%")) { tok1 = tok1->tokAt(-2); if (tok1->strAt(-1) != ")") member = false; } if (member) { if (tok1->strAt(-1) == ">") tok1 = tok1->previous()->findOpeningBracket(); if (tok1 && Token::Match(tok1->tokAt(-3), "%name% :: %name%")) { tok1 = tok1->tokAt(-2); std::string scope = tok1->strAt(-1); while (Token::Match(tok1->tokAt(-2), ":: %name%")) { scope = tok1->strAt(-3) + " :: " + scope; tok1 = tok1->tokAt(-2); } if (!nextScopeNameAddition.empty() && !scope.empty()) nextScopeNameAddition += " :: "; nextScopeNameAddition += scope; } } } // New scope is opening, record it here std::shared_ptr newScopeInfo = std::make_shared(tok->scopeInfo()->name, tok->link(), tok->scopeInfo()->usingNamespaces); if (newScopeInfo->name != "" && nextScopeNameAddition != "") newScopeInfo->name.append(" :: "); newScopeInfo->name.append(nextScopeNameAddition); nextScopeNameAddition = ""; if (tok->link()) tok->link()->scopeInfo(tok->scopeInfo()); tok->scopeInfo(newScopeInfo); } } } } void Tokenizer::simplifyTemplates() { if (isC()) return; mTemplateSimplifier->simplifyTemplates( #ifdef MAXTIME mMaxTime, #else 0, // ignored #endif mCodeWithTemplates); } //--------------------------------------------------------------------------- static bool setVarIdParseDeclaration(const Token **tok, const std::map &variableId, bool executableScope, bool cpp, bool c) { const Token *tok2 = *tok; if (!tok2->isName()) return false; int typeCount = 0; int singleNameCount = 0; bool hasstruct = false; // Is there a "struct" or "class"? bool bracket = false; bool ref = false; while (tok2) { if (tok2->isName()) { if (cpp && Token::Match(tok2, "namespace|public|private|protected")) return false; if (cpp && Token::simpleMatch(tok2, "decltype (")) { typeCount = 1; tok2 = tok2->linkAt(1)->next(); continue; } if (Token::Match(tok2, "struct|union|enum") || (!c && Token::Match(tok2, "class|typename"))) { hasstruct = true; typeCount = 0; singleNameCount = 0; } else if (tok2->str() == "const") { // just skip "const" } else if (!hasstruct && variableId.find(tok2->str()) != variableId.end() && tok2->previous()->str() != "::") { ++typeCount; tok2 = tok2->next(); if (!tok2 || tok2->str() != "::") break; } else { if (tok2->str() != "void" || Token::Match(tok2, "void const| *|(")) // just "void" cannot be a variable type ++typeCount; ++singleNameCount; } } else if (!c && ((TemplateSimplifier::templateParameters(tok2) > 0) || Token::simpleMatch(tok2, "< >") /* Ticket #4764 */)) { const Token *start = *tok; if (Token::Match(start->previous(), "%or%|%oror%|&&|&|^|+|-|*|/")) return false; const Token * const closingBracket = tok2->findClosingBracket(); if (closingBracket == nullptr) { /* Ticket #8151 */ throw tok2; } tok2 = closingBracket; if (tok2->str() != ">") break; singleNameCount = 1; if (Token::Match(tok2, "> %name% %or%|%oror%|&&|&|^|+|-|*|/") && !Token::Match(tok2, "> const [*&]")) return false; if (Token::Match(tok2, "> %name% )")) { if (Token::Match(tok2->linkAt(2)->previous(), "if|for|while (")) return false; if (!Token::Match(tok2->linkAt(2)->previous(), "%name% (")) return false; } } else if (Token::Match(tok2, "&|&&")) { ref = !bracket; } else if (singleNameCount >= 1 && Token::Match(tok2, "( [*&]") && Token::Match(tok2->link()->next(), "(|[")) { bracket = true; // Skip: Seems to be valid pointer to array or function pointer } else if (singleNameCount >= 1 && Token::Match(tok2, "( * %name% [") && Token::Match(tok2->linkAt(3), "] ) [;,]")) { bracket = true; } else if (tok2->str() == "::") { singleNameCount = 0; } else if (tok2->str() != "*" && tok2->str() != "::" && tok2->str() != "...") { break; } tok2 = tok2->next(); } if (tok2) { bool isLambdaArg = false; { const Token *tok3 = (*tok)->previous(); if (tok3 && tok3->str() == ",") { while (tok3 && !Token::Match(tok3,";|(|[|{")) { if (Token::Match(tok3, ")|]")) tok3 = tok3->link(); tok3 = tok3->previous(); } if (tok3 && executableScope && Token::Match(tok3->previous(), "%name% (")) { const Token *fdecl = tok3->previous(); int count = 0; while (Token::Match(fdecl, "%name%|*")) { fdecl = fdecl->previous(); count++; } if (!Token::Match(fdecl, "[;{}] %name%") || count <= 1) return false; } } if (cpp && tok3 && Token::simpleMatch(tok3->previous(), "] (") && Token::simpleMatch(tok3->link(), ") {")) isLambdaArg = true; } *tok = tok2; // In executable scopes, references must be assigned // Catching by reference is an exception if (executableScope && ref && !isLambdaArg) { if (Token::Match(tok2, "(|=|{|:")) ; // reference is assigned => ok else if (tok2->str() != ")" || tok2->link()->strAt(-1) != "catch") return false; // not catching by reference => not declaration } } // Check if array declaration is valid (#2638) // invalid declaration: AAA a[4] = 0; if (typeCount >= 2 && executableScope && tok2 && tok2->str() == "[") { const Token *tok3 = tok2->link()->next(); while (tok3 && tok3->str() == "[") { tok3 = tok3->link()->next(); } if (Token::Match(tok3, "= %num%")) return false; } return (typeCount >= 2 && tok2 && Token::Match(tok2->tokAt(-2), "!!:: %type%")); } void Tokenizer::setVarIdStructMembers(Token **tok1, std::map>& structMembers, nonneg int *varId) const { Token *tok = *tok1; if (Token::Match(tok, "%name% = { . %name% =|{")) { const int struct_varid = tok->varId(); if (struct_varid == 0) return; std::map& members = structMembers[struct_varid]; tok = tok->tokAt(3); while (tok->str() != "}") { if (Token::Match(tok, "{|[|(")) tok = tok->link(); if (Token::Match(tok->previous(), "[,{] . %name% =|{")) { tok = tok->next(); const std::map::iterator it = members.find(tok->str()); if (it == members.end()) { members[tok->str()] = ++(*varId); tok->varId(*varId); } else { tok->varId(it->second); } } tok = tok->next(); } return; } while (Token::Match(tok->next(), ")| . %name% !!(")) { // Don't set varid for trailing return type if (tok->strAt(1) == ")" && tok->linkAt(1)->previous()->isName() && isFunctionHead(tok->linkAt(1), "{|;")) { tok = tok->tokAt(3); continue; } const int struct_varid = tok->varId(); tok = tok->tokAt(2); if (struct_varid == 0) continue; if (tok->str() == ".") tok = tok->next(); // Don't set varid for template function if (TemplateSimplifier::templateParameters(tok->next()) > 0) break; std::map& members = structMembers[struct_varid]; const std::map::iterator it = members.find(tok->str()); if (it == members.end()) { members[tok->str()] = ++(*varId); tok->varId(*varId); } else { tok->varId(it->second); } } // tok can't be null *tok1 = tok; } void Tokenizer::setVarIdClassDeclaration(const Token * const startToken, const VariableMap &variableMap, const nonneg int scopeStartVarId, std::map>& structMembers) { // end of scope const Token * const endToken = startToken->link(); // determine class name std::string className; for (const Token *tok = startToken->previous(); tok; tok = tok->previous()) { if (!tok->isName() && tok->str() != ":") break; if (Token::Match(tok, "class|struct|enum %type% [:{]")) { className = tok->next()->str(); break; } } // replace varids.. int indentlevel = 0; bool initList = false; bool inEnum = false; const Token *initListArgLastToken = nullptr; for (Token *tok = startToken->next(); tok != endToken; tok = tok->next()) { if (!tok) syntaxError(nullptr); if (initList) { if (tok == initListArgLastToken) initListArgLastToken = nullptr; else if (!initListArgLastToken && Token::Match(tok->previous(), "%name%|>|>> {|(") && Token::Match(tok->link(), "}|) ,|{")) initListArgLastToken = tok->link(); } if (tok->str() == "{") { inEnum = isEnumStart(tok); if (initList && !initListArgLastToken) initList = false; ++indentlevel; } else if (tok->str() == "}") { --indentlevel; inEnum = false; } else if (initList && indentlevel == 0 && Token::Match(tok->previous(), "[,:] %name% [({]")) { const std::map::const_iterator it = variableMap.find(tok->str()); if (it != variableMap.end()) { tok->varId(it->second); } } else if (tok->isName() && tok->varId() <= scopeStartVarId) { if (indentlevel > 0 || initList) { if (Token::Match(tok->previous(), "::|.") && tok->strAt(-2) != "this" && !Token::simpleMatch(tok->tokAt(-5), "( * this ) .")) continue; if (!tok->next()) syntaxError(nullptr); if (tok->next()->str() == "::") { if (tok->str() == className) tok = tok->tokAt(2); else continue; } if (!inEnum) { const std::map::const_iterator it = variableMap.find(tok->str()); if (it != variableMap.end()) { tok->varId(it->second); setVarIdStructMembers(&tok, structMembers, variableMap.getVarId()); } } } } else if (indentlevel == 0 && tok->str() == ":" && !initListArgLastToken) initList = true; } } // Update the variable ids.. // Parse each function.. void Tokenizer::setVarIdClassFunction(const std::string &classname, Token * const startToken, const Token * const endToken, const std::map &varlist, std::map>& structMembers, nonneg int *varId_) { for (Token *tok2 = startToken; tok2 && tok2 != endToken; tok2 = tok2->next()) { if (tok2->varId() != 0 || !tok2->isName()) continue; if (Token::Match(tok2->tokAt(-2), ("!!" + classname + " ::").c_str())) continue; if (Token::Match(tok2->tokAt(-4), "%name% :: %name% ::")) // Currently unsupported continue; if (Token::Match(tok2->tokAt(-2), "!!this .") && !Token::simpleMatch(tok2->tokAt(-5), "( * this ) .")) continue; const std::map::const_iterator it = varlist.find(tok2->str()); if (it != varlist.end()) { tok2->varId(it->second); setVarIdStructMembers(&tok2, structMembers, varId_); } } } void Tokenizer::setVarId() { // Clear all variable ids for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->isName()) tok->varId(0); } setPodTypes(); setVarIdPass1(); setVarIdPass2(); } // Variable declarations can't start with "return" etc. #define NOTSTART_C "NOT", "case", "default", "goto", "not", "return", "sizeof", "typedef" static const std::unordered_set notstart_c = { NOTSTART_C }; static const std::unordered_set notstart_cpp = { NOTSTART_C, "delete", "friend", "new", "throw", "using", "virtual", "explicit", "const_cast", "dynamic_cast", "reinterpret_cast", "static_cast", "template" }; void Tokenizer::setVarIdPass1() { // Variable declarations can't start with "return" etc. const std::unordered_set& notstart = (isC()) ? notstart_c : notstart_cpp; VariableMap variableMap; std::map> structMembers; std::stack scopeStack; scopeStack.push(VarIdScopeInfo()); std::stack functionDeclEndStack; const Token *functionDeclEndToken = nullptr; bool initlist = false; bool inlineFunction = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->isOp()) continue; if (tok == functionDeclEndToken) { functionDeclEndStack.pop(); functionDeclEndToken = functionDeclEndStack.empty() ? nullptr : functionDeclEndStack.top(); if (tok->str() == ":") initlist = true; else if (tok->str() == ";") { if (!variableMap.leaveScope()) cppcheckError(tok); } else if (tok->str() == "{") { scopeStack.push(VarIdScopeInfo(true, scopeStack.top().isStructInit || tok->strAt(-1) == "=", /*isEnum=*/ false, *variableMap.getVarId())); // check if this '{' is a start of an "if" body const Token * ifToken = tok->previous(); if (ifToken && ifToken->str() == ")") ifToken = ifToken->link(); else ifToken = nullptr; if (ifToken) ifToken = ifToken->previous(); if (ifToken && ifToken->str() == "if") { // open another scope to differentiate between variables declared in the "if" condition and in the "if" body variableMap.enterScope(); } } } else if (!initlist && tok->str()=="(") { const Token * newFunctionDeclEnd = nullptr; if (!scopeStack.top().isExecutable) newFunctionDeclEnd = isFunctionHead(tok, "{:;"); else { Token const * const tokenLinkNext = tok->link()->next(); if (tokenLinkNext && tokenLinkNext->str() == "{") // might be for- or while-loop or if-statement newFunctionDeclEnd = tokenLinkNext; } if (newFunctionDeclEnd && newFunctionDeclEnd != functionDeclEndToken) { functionDeclEndStack.push(newFunctionDeclEnd); functionDeclEndToken = newFunctionDeclEnd; variableMap.enterScope(); } } else if (Token::Match(tok, "{|}")) { inlineFunction = false; const Token * const startToken = (tok->str() == "{") ? tok : tok->link(); // parse anonymous unions as part of the current scope if (!Token::Match(startToken->previous(), "union|struct|enum {") && !(initlist && Token::Match(startToken->previous(), "%name%|>|>>") && Token::Match(startToken->link(), "} ,|{"))) { if (tok->str() == "{") { bool isExecutable; const Token *prev = tok->previous(); while (Token::Match(prev, "%name%|.")) prev = prev->previous(); const bool isLambda = prev && prev->str() == ")" && Token::simpleMatch(prev->link()->previous(), "] ("); if ((!isLambda && (tok->strAt(-1) == ")" || Token::Match(tok->tokAt(-2), ") %type%"))) || (initlist && tok->strAt(-1) == "}")) { isExecutable = true; } else { isExecutable = ((scopeStack.top().isExecutable || initlist || tok->strAt(-1) == "else") && !isClassStructUnionEnumStart(tok)); if (!(scopeStack.top().isStructInit || tok->strAt(-1) == "=")) variableMap.enterScope(); } initlist = false; scopeStack.push(VarIdScopeInfo(isExecutable, scopeStack.top().isStructInit || tok->strAt(-1) == "=", isEnumStart(tok), *variableMap.getVarId())); } else { /* if (tok->str() == "}") */ bool isNamespace = false; for (const Token *tok1 = tok->link()->previous(); tok1 && tok1->isName(); tok1 = tok1->previous()) { if (tok1->str() == "namespace") { isNamespace = true; break; } } // Set variable ids in class declaration.. if (!initlist && !isC() && !scopeStack.top().isExecutable && tok->link() && !isNamespace) { setVarIdClassDeclaration(tok->link(), variableMap, scopeStack.top().startVarid, structMembers); } if (!scopeStack.top().isStructInit) { variableMap.leaveScope(); // check if this '}' is an end of an "else" body or an "if" body without an "else" part const Token * ifToken = startToken->previous(); if (ifToken && ifToken->str() == ")") ifToken = ifToken->link()->previous(); else ifToken = nullptr; if (startToken->strAt(-1) == "else" || (ifToken && ifToken->str() == "if" && tok->strAt(1) != "else")) { // leave the extra scope used to differentiate between variables declared in the "if" condition and in the "if" body variableMap.leaveScope(); } } scopeStack.pop(); if (scopeStack.empty()) { // should be impossible scopeStack.push(VarIdScopeInfo()); } } } } if (!scopeStack.top().isStructInit && (tok == list.front() || Token::Match(tok, "[;{}]") || (tok->str() == "(" && isFunctionHead(tok,"{")) || (tok->str() == "(" && !scopeStack.top().isExecutable && isFunctionHead(tok,";:")) || (tok->str() == "," && (!scopeStack.top().isExecutable || inlineFunction)) || (tok->isName() && endsWith(tok->str(), ':')))) { // No variable declarations in sizeof if (Token::simpleMatch(tok->previous(), "sizeof (")) { continue; } if (Settings::terminated()) return; // locate the variable name.. const Token *tok2 = (tok->isName()) ? tok : tok->next(); // private: protected: public: etc while (tok2 && endsWith(tok2->str(), ':')) { tok2 = tok2->next(); } if (!tok2) break; // Variable declaration can't start with "return", etc if (notstart.find(tok2->str()) != notstart.end()) continue; if (!isC() && Token::simpleMatch(tok2, "const new")) continue; bool decl; if (isCPP() && mSettings->standards.cpp >= Standards::CPP17 && Token::Match(tok, "[(;{}] const| auto &|&&| [")) { // Structured bindings tok2 = Token::findsimplematch(tok, "["); if ((Token::simpleMatch(tok->previous(), "for (") && Token::simpleMatch(tok2->link(), "] :")) || Token::simpleMatch(tok2->link(), "] =")) { while (tok2 && tok2->str() != "]") { if (Token::Match(tok2, "%name% [,]]")) variableMap.addVariable(tok2->str()); tok2 = tok2->next(); } continue; } } try { /* Ticket #8151 */ decl = setVarIdParseDeclaration(&tok2, variableMap.map(), scopeStack.top().isExecutable, isCPP(), isC()); } catch (const Token * errTok) { syntaxError(errTok); } if (decl) { if (isCPP()) { if (Token *declTypeTok = Token::findsimplematch(tok, "decltype (", tok2)) { for (Token *declTok = declTypeTok->linkAt(1); declTok != declTypeTok; declTok = declTok->previous()) { if (declTok->isName() && !Token::Match(declTok->previous(), "::|.") && variableMap.hasVariable(declTok->str())) declTok->varId(variableMap.find(declTok->str())->second); } } } if (tok->str() == "(" && isFunctionHead(tok,"{") && scopeStack.top().isExecutable) inlineFunction = true; const Token* prev2 = tok2->previous(); if (Token::Match(prev2, "%type% [;[=,)]") && tok2->previous()->str() != "const") ; else if (Token::Match(prev2, "%type% :") && tok->strAt(-1) == "for") ; else if (Token::Match(prev2, "%type% ( !!)") && Token::simpleMatch(tok2->link(), ") ;")) { // In C++ , a variable can't be called operator+ or something like that. if (isCPP() && prev2->isOperatorKeyword()) continue; const Token *tok3 = tok2->next(); if (!tok3->isStandardType() && tok3->str() != "void" && !Token::Match(tok3, "struct|union|class %type%") && tok3->str() != "." && !Token::Match(tok2->link()->previous(), "[&*]")) { if (!scopeStack.top().isExecutable) { // Detecting initializations with () in non-executable scope is hard and often impossible to be done safely. Thus, only treat code as a variable that definitely is one. decl = false; bool rhs = false; for (; tok3; tok3 = tok3->nextArgumentBeforeCreateLinks2()) { if (tok3->str() == "=") { rhs = true; continue; } if (tok3->str() == ",") { rhs = false; continue; } if (rhs) continue; if (tok3->isLiteral() || (tok3->isName() && variableMap.hasVariable(tok3->str())) || tok3->isOp() || tok3->str() == "(" || notstart.find(tok3->str()) != notstart.end()) { decl = true; break; } } } } else decl = false; } else if (isCPP() && Token::Match(prev2, "%type% {") && Token::simpleMatch(tok2->link(), "} ;")) { // C++11 initialization style if (tok2->link() != tok2->next() && // add value-initialized variable T x{}; (Token::Match(prev2, "do|try|else") || Token::Match(prev2->tokAt(-2), "struct|class|:"))) continue; } else decl = false; if (decl) { variableMap.addVariable(prev2->str()); if (Token::simpleMatch(tok->previous(), "for (") && Token::Match(prev2, "%name% [=,]")) { for (const Token *tok3 = prev2->next(); tok3 && tok3->str() != ";"; tok3 = tok3->next()) { if (Token::Match(tok3, "[([]")) tok3 = tok3->link(); if (Token::Match(tok3, ", %name% [,=;]")) variableMap.addVariable(tok3->next()->str()); } } // set varid for template parameters.. tok = tok->next(); while (Token::Match(tok, "%name%|::")) tok = tok->next(); if (tok && tok->str() == "<") { const Token *end = tok->findClosingBracket(); while (tok != end) { if (tok->isName() && !(Token::simpleMatch(tok->next(), "<") && Token::Match(tok->tokAt(-2), "std :: %name%"))) { const std::map::const_iterator it = variableMap.find(tok->str()); if (it != variableMap.end()) tok->varId(it->second); } tok = tok->next(); } } tok = tok2->previous(); } } } if (tok->isName()) { // don't set variable id after a struct|enum|union if (Token::Match(tok->previous(), "struct|enum|union") || (isCPP() && tok->strAt(-1) == "class")) continue; if (!isC()) { if (tok->previous() && tok->previous()->str() == "::") continue; if (tok->next() && tok->next()->str() == "::") continue; if (Token::simpleMatch(tok->tokAt(-2), ":: template")) continue; } // function declaration inside executable scope? Function declaration is of form: type name "(" args ")" if (scopeStack.top().isExecutable && Token::Match(tok, "%name% [,)]")) { bool par = false; const Token *start, *end; // search begin of function declaration for (start = tok; Token::Match(start, "%name%|*|&|,|("); start = start->previous()) { if (start->str() == "(") { if (par) break; par = true; } if (Token::Match(start, "[(,]")) { if (!Token::Match(start, "[(,] %type% %name%|*|&")) break; } if (start->varId() > 0) break; } // search end of function declaration for (end = tok->next(); Token::Match(end, "%name%|*|&|,"); end = end->next()) {} // there are tokens which can't appear at the begin of a function declaration such as "return" const bool isNotstartKeyword = start->next() && notstart.find(start->next()->str()) != notstart.end(); // now check if it is a function declaration if (Token::Match(start, "[;{}] %type% %name%|*") && par && Token::simpleMatch(end, ") ;") && !isNotstartKeyword) // function declaration => don't set varid continue; } if (!scopeStack.top().isEnum || !(Token::Match(tok->previous(), "{|,") && Token::Match(tok->next(), ",|=|}"))) { const std::map::const_iterator it = variableMap.find(tok->str()); if (it != variableMap.end()) { tok->varId(it->second); setVarIdStructMembers(&tok, structMembers, variableMap.getVarId()); } } } else if (Token::Match(tok, "::|. %name%")) { // Don't set varid after a :: or . token tok = tok->next(); } else if (tok->str() == ":" && Token::Match(tok->tokAt(-2), "class %type%")) { do { tok = tok->next(); } while (tok && (tok->isName() || tok->str() == ",")); if (!tok) break; tok = tok->previous(); } } mVarId = *variableMap.getVarId(); } namespace { struct Member { Member(const std::list &s, const std::list &ns, Token *t) : usingnamespaces(ns), scope(s), tok(t) {} std::list usingnamespaces; std::list scope; Token *tok; }; } static std::string getScopeName(const std::list &scopeInfo) { std::string ret; for (const ScopeInfo2 &si : scopeInfo) ret += (ret.empty() ? "" : " :: ") + (si.name); return ret; } static Token * matchMemberName(const std::list &scope, const Token *nsToken, Token *memberToken, const std::list &scopeInfo) { std::list::const_iterator scopeIt = scopeInfo.begin(); // Current scope.. for (std::list::const_iterator it = scope.begin(); it != scope.end(); ++it) { if (scopeIt == scopeInfo.end() || scopeIt->name != *it) return nullptr; ++scopeIt; } // using namespace.. if (nsToken) { while (Token::Match(nsToken, "%name% ::")) { if (scopeIt != scopeInfo.end() && nsToken->str() == scopeIt->name) { nsToken = nsToken->tokAt(2); ++scopeIt; } else { return nullptr; } } if (!Token::Match(nsToken, "%name% ;")) return nullptr; if (scopeIt == scopeInfo.end() || nsToken->str() != scopeIt->name) return nullptr; ++scopeIt; } // Parse member tokens.. while (scopeIt != scopeInfo.end()) { if (!Token::Match(memberToken, "%name% ::|<")) return nullptr; if (memberToken->str() != scopeIt->name) return nullptr; if (memberToken->next()->str() == "<") { memberToken = memberToken->next()->findClosingBracket(); if (!Token::simpleMatch(memberToken, "> ::")) return nullptr; } memberToken = memberToken->tokAt(2); ++scopeIt; } return Token::Match(memberToken, "~| %name%") ? memberToken : nullptr; } static Token * matchMemberName(const Member &member, const std::list &scopeInfo) { if (scopeInfo.empty()) return nullptr; // Does this member match without "using namespace".. Token *ret = matchMemberName(member.scope, nullptr, member.tok, scopeInfo); if (ret) return ret; // Try to match member using the "using namespace ..." namespaces.. for (const Token *ns : member.usingnamespaces) { ret = matchMemberName(member.scope, ns, member.tok, scopeInfo); if (ret) return ret; } return nullptr; } static Token * matchMemberVarName(const Member &var, const std::list &scopeInfo) { Token *tok = matchMemberName(var, scopeInfo); return Token::Match(tok, "%name% !!(") ? tok : nullptr; } static Token * matchMemberFunctionName(const Member &func, const std::list &scopeInfo) { Token *tok = matchMemberName(func, scopeInfo); return Token::Match(tok, "~| %name% (") ? tok : nullptr; } void Tokenizer::setVarIdPass2() { std::map> structMembers; // Member functions and variables in this source std::list allMemberFunctions; std::list allMemberVars; if (!isC()) { std::map endOfScope; std::list scope; std::list usingnamespaces; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->previous() || Token::Match(tok->previous(), "[;{}]")) { if (Token::Match(tok, "using namespace %name% ::|;")) { Token *endtok = tok->tokAt(2); while (Token::Match(endtok, "%name% ::")) endtok = endtok->tokAt(2); if (Token::Match(endtok, "%name% ;")) usingnamespaces.push_back(tok->tokAt(2)); tok = endtok; continue; } else if (Token::Match(tok, "namespace %name% {")) { scope.push_back(tok->strAt(1)); endOfScope[tok->linkAt(2)] = tok->strAt(1); } } if (tok->str() == "}") { const std::map::iterator it = endOfScope.find(tok); if (it != endOfScope.end()) scope.remove(it->second); } Token* const tok1 = tok; if (Token::Match(tok->previous(), "!!:: %name% :: ~| %name%")) tok = tok->next(); else if (Token::Match(tok->previous(), "!!:: %name% <") && Token::Match(tok->next()->findClosingBracket(),"> :: ~| %name%")) tok = tok->next()->findClosingBracket()->next(); else continue; while (Token::Match(tok, ":: ~| %name%")) { tok = tok->next(); if (tok->str() == "~") tok = tok->next(); else if (Token::Match(tok, "%name% <") && Token::Match(tok->next()->findClosingBracket(),"> :: ~| %name%")) tok = tok->next()->findClosingBracket()->next(); else if (Token::Match(tok, "%name% ::")) tok = tok->next(); else break; } if (!tok->next()) syntaxError(tok); if (Token::Match(tok, "%name% (")) allMemberFunctions.emplace_back(scope, usingnamespaces, tok1); else allMemberVars.emplace_back(scope, usingnamespaces, tok1); } } std::list scopeInfo; // class members.. std::map> varsByClass; for (Token *tok = list.front(); tok; tok = tok->next()) { while (tok->str() == "}" && !scopeInfo.empty() && tok == scopeInfo.back().bodyEnd) scopeInfo.pop_back(); if (!Token::Match(tok, "namespace|class|struct %name% {|:|::|<")) continue; const std::string &scopeName(getScopeName(scopeInfo)); const std::string scopeName2(scopeName.empty() ? std::string() : (scopeName + " :: ")); std::list classnameTokens; classnameTokens.push_back(tok->next()); const Token* tokStart = tok->tokAt(2); while (Token::Match(tokStart, ":: %name%") || tokStart->str() == "<") { if (tokStart->str() == "<") { // skip the template part tokStart = tokStart->findClosingBracket()->next(); } else { classnameTokens.push_back(tokStart->next()); tokStart = tokStart->tokAt(2); } } std::string classname; for (const Token *it : classnameTokens) classname += (classname.empty() ? "" : " :: ") + it->str(); std::map &thisClassVars = varsByClass[scopeName2 + classname]; while (Token::Match(tokStart, ":|::|,|%name%")) { if (Token::Match(tokStart, "%name% <")) { tokStart = tokStart->next()->findClosingBracket(); if (tokStart) tokStart = tokStart->next(); continue; } if (Token::Match(tokStart, "%name% ,|{")) { std::string baseClassName = tokStart->str(); std::string scopeName3(scopeName2); while (!scopeName3.empty()) { const std::string name = scopeName3 + baseClassName; if (varsByClass.find(name) != varsByClass.end()) { baseClassName = name; break; } // Remove last scope name if (scopeName3.size() <= 8) break; scopeName3.erase(scopeName3.size() - 4); const std::string::size_type pos = scopeName3.rfind(" :: "); if (pos == std::string::npos) break; scopeName3.erase(pos + 4); } const std::map& baseClassVars = varsByClass[baseClassName]; thisClassVars.insert(baseClassVars.begin(), baseClassVars.end()); } tokStart = tokStart->next(); } if (!Token::simpleMatch(tokStart, "{")) continue; // What member variables are there in this class? for (const Token *it : classnameTokens) scopeInfo.emplace_back(it->str(), tokStart->link()); for (Token *tok2 = tokStart->next(); tok2 && tok2 != tokStart->link(); tok2 = tok2->next()) { // skip parentheses.. if (tok2->link()) { if (tok2->str() == "(") { Token *funcstart = const_cast(isFunctionHead(tok2, "{")); if (funcstart) { setVarIdClassFunction(scopeName2 + classname, funcstart, funcstart->link(), thisClassVars, structMembers, &mVarId); tok2 = funcstart->link(); continue; } } if (tok2->str() == "{") { if (tok2->strAt(-1) == ")") setVarIdClassFunction(scopeName2 + classname, tok2, tok2->link(), thisClassVars, structMembers, &mVarId); tok2 = tok2->link(); } else if (Token::Match(tok2, "( %name%|)") && !Token::Match(tok2->link(), "(|[")) { tok2 = tok2->link(); // Skip initialization list while (Token::Match(tok2, ") [:,] %name% (")) tok2 = tok2->linkAt(3); } } // Found a member variable.. else if (tok2->varId() > 0) thisClassVars[tok2->str()] = tok2->varId(); } // Are there any member variables in this class? if (thisClassVars.empty()) continue; // Member variables for (const Member &var : allMemberVars) { Token *tok2 = matchMemberVarName(var, scopeInfo); if (!tok2) continue; tok2->varId(thisClassVars[tok2->str()]); } if (isC() || tok->str() == "namespace") continue; // Set variable ids in member functions for this class.. for (const Member &func : allMemberFunctions) { Token *tok2 = matchMemberFunctionName(func, scopeInfo); if (!tok2) continue; if (tok2->str() == "~") tok2 = tok2->linkAt(2); else tok2 = tok2->linkAt(1); // If this is a function implementation.. add it to funclist Token * start = const_cast(isFunctionHead(tok2, "{")); if (start) { setVarIdClassFunction(classname, start, start->link(), thisClassVars, structMembers, &mVarId); } if (Token::Match(tok2, ") %name% (")) tok2 = tok2->linkAt(2); // constructor with initializer list if (!Token::Match(tok2, ") : ::| %name%")) continue; Token *tok3 = tok2; while (Token::Match(tok3, "[)}] [,:]")) { tok3 = tok3->tokAt(2); if (Token::Match(tok3, ":: %name%")) tok3 = tok3->next(); while (Token::Match(tok3, "%name% :: %name%")) tok3 = tok3->tokAt(2); if (!Token::Match(tok3, "%name% (|{|<")) break; // set varid const std::map::const_iterator varpos = thisClassVars.find(tok3->str()); if (varpos != thisClassVars.end()) tok3->varId(varpos->second); // goto end of var if (tok3->strAt(1) == "<") { tok3 = tok3->next()->findClosingBracket(); if (tok3 && tok3->next() && tok3->next()->link()) tok3 = tok3->next()->link(); } else tok3 = tok3->linkAt(1); } if (Token::Match(tok3, ")|} {")) { setVarIdClassFunction(classname, tok2, tok3->next()->link(), thisClassVars, structMembers, &mVarId); } } } } static void linkBrackets(const Tokenizer * const tokenizer, std::stack& type, std::stack& links, Token * const token, const char open, const char close) { if (token->str()[0] == open) { links.push(token); type.push(token); } else if (token->str()[0] == close) { if (links.empty()) { // Error, { and } don't match. tokenizer->unmatchedToken(token); } if (type.top()->str()[0] != open) { tokenizer->unmatchedToken(type.top()); } type.pop(); Token::createMutualLinks(links.top(), token); links.pop(); } } void Tokenizer::createLinks() { std::stack type; std::stack links1; std::stack links2; std::stack links3; for (Token *token = list.front(); token; token = token->next()) { if (token->link()) { token->link(nullptr); } linkBrackets(this, type, links1, token, '{', '}'); linkBrackets(this, type, links2, token, '(', ')'); linkBrackets(this, type, links3, token, '[', ']'); } if (!links1.empty()) { // Error, { and } don't match. unmatchedToken(links1.top()); } if (!links2.empty()) { // Error, ( and ) don't match. unmatchedToken(links2.top()); } if (!links3.empty()) { // Error, [ and ] don't match. unmatchedToken(links3.top()); } } void Tokenizer::createLinks2() { if (isC()) return; bool isStruct = false; std::stack type; std::stack templateTokens; for (Token *token = list.front(); token; token = token->next()) { if (Token::Match(token, "%name%|> %name% [:<]")) isStruct = true; else if (Token::Match(token, "[;{}]")) isStruct = false; if (token->link()) { if (Token::Match(token, "{|[|(")) type.push(token); else if (!type.empty() && Token::Match(token, "}|]|)")) { while (type.top()->str() == "<") { if (!templateTokens.empty() && templateTokens.top()->next() == type.top()) templateTokens.pop(); type.pop(); } type.pop(); } } else if (templateTokens.empty() && !isStruct && Token::Match(token, "%oror%|&&|;")) { if (Token::Match(token, "&& [,>]")) continue; // If there is some such code: A.. // Then this is probably a template instantiation if either "B" or "C" has comparisons if (token->tokType() == Token::eLogicalOp && !type.empty() && type.top()->str() == "<") { const Token *prev = token->previous(); bool foundComparison = false; while (Token::Match(prev, "%name%|%num%|%str%|%cop%|)|]") && prev != type.top()) { if (prev->str() == ")" || prev->str() == "]") prev = prev->link(); else if (prev->tokType() == Token::eLogicalOp) break; else if (prev->isComparisonOp()) foundComparison = true; prev = prev->previous(); } if (prev == type.top() && foundComparison) continue; const Token *next = token->next(); foundComparison = false; while (Token::Match(next, "%name%|%num%|%str%|%cop%|(|[") && next->str() != ">") { if (next->str() == "(" || next->str() == "[") next = next->link(); else if (next->tokType() == Token::eLogicalOp) break; else if (next->isComparisonOp()) foundComparison = true; next = next->next(); } if (next && next->str() == ">" && foundComparison) continue; } while (!type.empty() && type.top()->str() == "<") { const Token* end = type.top()->findClosingBracket(); if (Token::Match(end, "> %comp%|;|.|=|{|::")) break; // Variable declaration if (Token::Match(end, "> %var% ;") && (type.top()->tokAt(-2) == nullptr || Token::Match(type.top()->tokAt(-2), ";|}|{"))) break; type.pop(); } } else if (token->str() == "<" && ((token->previous() && (token->previous()->isTemplate() || (token->previous()->isName() && !token->previous()->varId()))) || Token::Match(token->next(), ">|>>"))) { type.push(token); if (token->previous()->str() == "template") templateTokens.push(token); } else if (token->str() == ">" || token->str() == ">>") { if (type.empty() || type.top()->str() != "<") // < and > don't match. continue; Token * const top1 = type.top(); type.pop(); Token * const top2 = type.empty() ? nullptr : type.top(); type.push(top1); if (!top2 || top2->str() != "<") { if (token->str() == ">>") continue; if (!Token::Match(token->next(), "%name%|%cop%|%assign%|::|,|(|)|{|}|;|[|:|.|=|...") && !Token::Match(token->next(), "&& %name% =")) continue; } // if > is followed by [ .. "new a[" is expected // unless this is from varidiac expansion if (token->strAt(1) == "[" && !Token::simpleMatch(token->tokAt(-1), "... >") && !Token::Match(token->tokAt(1), "[ ]")) { Token *prev = type.top()->previous(); while (prev && Token::Match(prev->previous(), ":: %name%")) prev = prev->tokAt(-2); if (prev && prev->str() != "new") prev = prev->previous(); if (!prev || prev->str() != "new") continue; } if (token->str() == ">>" && top1 && top2) { type.pop(); type.pop(); // Split the angle brackets token->str(">"); Token::createMutualLinks(top1, token->insertTokenBefore(">")); Token::createMutualLinks(top2, token); if (templateTokens.size() == 2 && (top1 == templateTokens.top() || top2 == templateTokens.top())) { templateTokens.pop(); templateTokens.pop(); } } else { type.pop(); if (Token::Match(token, "> %name%") && !token->next()->isKeyword() && Token::Match(top1->tokAt(-2), "%op% %name% <") && (templateTokens.empty() || top1 != templateTokens.top())) continue; Token::createMutualLinks(top1, token); if (!templateTokens.empty() && top1 == templateTokens.top()) templateTokens.pop(); } } } } void Tokenizer::sizeofAddParentheses() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "sizeof !!(")) continue; if (tok->next()->isLiteral() || Token::Match(tok->next(), "%name%|*|~|!|&")) { Token *endToken = tok->next(); while (Token::simpleMatch(endToken, "* *")) endToken = endToken->next(); while (Token::Match(endToken->next(), "%name%|%num%|%str%|[|(|.|::|++|--|!|~") || (Token::Match(endToken, "%type% * %op%|?|:|const|;|,"))) { if (Token::Match(endToken->next(), "(|[")) endToken = endToken->linkAt(1); else endToken = endToken->next(); } // Add ( after sizeof and ) behind endToken tok->insertToken("("); endToken->insertToken(")"); Token::createMutualLinks(tok->next(), endToken->next()); } } } bool Tokenizer::simplifySizeof() { // Locate variable declarations and calculate the size std::map sizeOfVar; std::map declTokOfVar; for (const Token *tok = list.front(); tok; tok = tok->next()) { if (tok->varId() != 0 && sizeOfVar.find(tok->varId()) == sizeOfVar.end()) { const int varId = tok->varId(); if (Token::Match(tok->tokAt(-3), "[;{}(,] %type% * %name% [;,)]") || Token::Match(tok->tokAt(-4), "[;{}(,] const %type% * %name% [;),]") || Token::Match(tok->tokAt(-2), "[;{}(,] %type% %name% [;),]") || Token::Match(tok->tokAt(-3), "[;{}(,] const %type% %name% [;),]")) { const int size = sizeOfType(tok->previous()); if (size == 0) { continue; } sizeOfVar[varId] = size; declTokOfVar[varId] = tok; } else if (Token::Match(tok->previous(), "%type% %name% [ %num% ] [[;=]") || Token::Match(tok->tokAt(-2), "%type% * %name% [ %num% ] [[;=]")) { int size = sizeOfType(tok->previous()); if (size == 0) continue; const Token* tok2 = tok->next(); do { const MathLib::bigint num = MathLib::toLongNumber(tok2->strAt(1)); if (num<0) break; size *= num; tok2 = tok2->tokAt(3); } while (Token::Match(tok2, "[ %num% ]")); if (Token::Match(tok2, "[;=]")) { sizeOfVar[varId] = size; declTokOfVar[varId] = tok; } if (!tok2) { syntaxError(tok); } tok = tok2; } else if (Token::Match(tok->previous(), "%type% %name% [ %num% ] [,)]") || Token::Match(tok->tokAt(-2), "%type% * %name% [ %num% ] [,)]")) { Token tempTok; tempTok.str("*"); sizeOfVar[varId] = sizeOfType(&tempTok); declTokOfVar[varId] = tok; } } } bool ret = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "sizeof") continue; if (Token::simpleMatch(tok->next(), "...")) { //tok->deleteNext(3); tok->deleteNext(); } // sizeof('x') if (Token::Match(tok->next(), "( %char% )")) { tok->deleteNext(); tok->deleteThis(); tok->deleteNext(); std::ostringstream sz; sz << ((isC()) ? mSettings->sizeof_int : 1); tok->str(sz.str()); ret = true; continue; } // sizeof ("text") if (Token::Match(tok->next(), "( %str% )")) { tok->deleteNext(); tok->deleteThis(); tok->deleteNext(); std::ostringstream ostr; ostr << (Token::getStrLength(tok) + 1); tok->str(ostr.str()); ret = true; continue; } // sizeof(type *) => sizeof(*) if (Token::Match(tok->next(), "( %type% * )")) { tok->next()->deleteNext(); } if (Token::simpleMatch(tok->next(), "( * )")) { tok->str(MathLib::toString(sizeOfType(tok->tokAt(2)))); tok->deleteNext(3); ret = true; } // sizeof( a ) else if (Token::Match(tok->next(), "( %var% )")) { const std::map::const_iterator sizeOfVarPos = sizeOfVar.find(tok->tokAt(2)->varId()); if (sizeOfVarPos != sizeOfVar.end()) { tok->deleteNext(); tok->deleteThis(); tok->deleteNext(); tok->str(MathLib::toString(sizeOfVarPos->second)); ret = true; } else { // don't try to replace size of variable if variable has // similar name with type (#329) } } else if (Token::Match(tok->next(), "( %type% )")) { const int size = sizeOfType(tok->tokAt(2)); if (size > 0) { tok->str(MathLib::toString(size)); tok->deleteNext(3); ret = true; } } else if (Token::simpleMatch(tok->next(), "( *") || Token::Match(tok->next(), "( %name% [")) { int derefs = 0; const Token* nametok = tok->tokAt(2); if (nametok->str() == "*") { do { nametok = nametok->next(); derefs++; } while (nametok && nametok->str() == "*"); if (!Token::Match(nametok, "%name% )")) continue; } else { const Token* tok2 = nametok->next(); do { tok2 = tok2->link()->next(); derefs++; } while (tok2 && tok2->str() == "["); if (!tok2 || tok2->str() != ")") continue; } // Some default value MathLib::biguint size = 0; const int varid = nametok->varId(); if (derefs != 0 && varid != 0 && declTokOfVar.find(varid) != declTokOfVar.end()) { // Try to locate variable declaration.. const Token *decltok = declTokOfVar[varid]; if (Token::Match(decltok->previous(), "%type%|* %name% [")) { size = sizeOfType(decltok->previous()); } else if (Token::Match(decltok->tokAt(-2), "%type% * %name%")) { size = sizeOfType(decltok->tokAt(-2)); } // Multi-dimensional array.. if (Token::Match(decltok, "%name% [") && Token::simpleMatch(decltok->linkAt(1), "] [")) { const Token *tok2 = decltok; for (int i = 0; i < derefs; i++) tok2 = tok2->linkAt(1); // Skip all dimensions that are dereferenced before the sizeof call while (Token::Match(tok2, "] [ %num% ]")) { size *= MathLib::toULongNumber(tok2->strAt(2)); tok2 = tok2->linkAt(1); } if (Token::simpleMatch(tok2, "] [")) continue; } } else if (nametok->strAt(1) == "[" && nametok->isStandardType()) { size = sizeOfType(nametok); if (size == 0) continue; const Token *tok2 = nametok->next(); while (Token::Match(tok2, "[ %num% ]")) { size *= MathLib::toULongNumber(tok2->strAt(1)); tok2 = tok2->link()->next(); } if (!tok2 || tok2->str() != ")") continue; } if (size > 0) { tok->str(MathLib::toString(size)); Token::eraseTokens(tok, tok->next()->link()->next()); ret = true; } } } return ret; } bool Tokenizer::simplifyTokenList1(const char FileName[]) { if (Settings::terminated()) return false; // if MACRO for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "if|for|while|BOOST_FOREACH %name% (")) { if (Token::simpleMatch(tok, "for each")) { // 'for each ( )' -> 'asm ( )' tok->str("asm"); tok->deleteNext(); } else if (tok->strAt(1) == "constexpr") { tok->deleteNext(); tok->isConstexpr(true); } else { syntaxError(tok); } } } // Is there C++ code in C file? validateC(); // remove MACRO in variable declaration: MACRO int x; removeMacroInVarDecl(); // Combine strings and character literals, e.g. L"string", L'c', "string1" "string2" combineStringAndCharLiterals(); // replace inline SQL with "asm()" (Oracle PRO*C). Ticket: #1959 simplifySQL(); createLinks(); removePragma(); // Simplify the C alternative tokens (and, or, etc.) simplifyCAlternativeTokens(); simplifyFunctionTryCatch(); simplifyHeadersAndUnusedTemplates(); // Remove __asm.. simplifyAsm(); // foo < bar < >> => foo < bar < > > if (isCPP() || mSettings->daca) splitTemplateRightAngleBrackets(!isCPP()); // Remove extra "template" tokens that are not used by cppcheck removeExtraTemplateKeywords(); removeAlignas(); simplifySpaceshipOperator(); // Bail out if code is garbage if (mTimerResults) { Timer t("Tokenizer::tokenize::findGarbageCode", mSettings->showtime, mTimerResults); findGarbageCode(); } else { findGarbageCode(); } checkConfiguration(); // if (x) MACRO() .. for (const Token *tok = list.front(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "if (")) { tok = tok->next()->link(); if (Token::Match(tok, ") %name% (") && tok->next()->isUpperCaseName() && Token::Match(tok->linkAt(2), ") {|else")) { syntaxError(tok->next()); } } } if (Settings::terminated()) return false; // convert C++17 style nested namespaces to old style namespaces simplifyNestedNamespace(); // convert c++20 coroutines simplifyCoroutines(); // simplify namespace aliases simplifyNamespaceAliases(); // Remove [[attribute]] and alignas(?) simplifyCPPAttribute(); // remove __attribute__((?)) simplifyAttribute(); // simplify cppcheck attributes __cppcheck_?__(?) simplifyCppcheckAttribute(); // Combine tokens.. combineOperators(); // replace 'sin(0)' to '0' and other similar math expressions simplifyMathExpressions(); // combine "- %num%" concatenateNegativeNumberAndAnyPositive(); // remove extern "C" and extern "C" {} if (isCPP()) simplifyExternC(); // simplify weird but legal code: "[;{}] ( { code; } ) ;"->"[;{}] code;" simplifyRoundCurlyParentheses(); // check for simple syntax errors.. for (const Token *tok = list.front(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "> struct {") && Token::simpleMatch(tok->linkAt(2), "} ;")) { syntaxError(tok); } } if (!simplifyAddBraces()) return false; sizeofAddParentheses(); // Simplify: 0[foo] -> *(foo) for (Token* tok = list.front(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "0 [") && tok->linkAt(1)) { tok->str("*"); tok->next()->str("("); tok->linkAt(1)->str(")"); } } if (Settings::terminated()) return false; // Remove __declspec() simplifyDeclspec(); validate(); // Remove "inline", "register", and "restrict" simplifyKeyword(); // simplify simple calculations inside <..> if (isCPP()) { Token *lt = nullptr; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}]")) lt = nullptr; else if (Token::Match(tok, "%type% <")) lt = tok->next(); else if (lt && Token::Match(tok, ">|>> %name%|::|(")) { const Token * const end = tok; for (tok = lt; tok != end; tok = tok->next()) { if (tok->isNumber()) TemplateSimplifier::simplifyNumericCalculations(tok); } lt = tok->next(); } } } // Convert K&R function declarations to modern C simplifyVarDecl(true); simplifyFunctionParameters(); // simplify case ranges (gcc extension) simplifyCaseRange(); // simplify labels and 'case|default'-like syntaxes simplifyLabelsCaseDefault(); // simplify '[;{}] * & ( %any% ) =' to '%any% =' simplifyMulAndParens(); if (!isC() && !mSettings->library.markupFile(FileName)) { findComplicatedSyntaxErrorsInTemplates(); } if (Settings::terminated()) return false; // remove calling conventions __cdecl, __stdcall.. simplifyCallingConvention(); addSemicolonAfterUnknownMacro(); // remove some unhandled macros in global scope removeMacrosInGlobalScope(); // remove undefined macro in class definition: // class DLLEXPORT Fred { }; // class Fred FINAL : Base { }; removeMacroInClassDef(); // That call here fixes #7190 validate(); // remove unnecessary member qualification.. removeUnnecessaryQualification(); // convert Microsoft memory functions simplifyMicrosoftMemoryFunctions(); // convert Microsoft string functions simplifyMicrosoftStringFunctions(); if (Settings::terminated()) return false; // Remove Qt signals and slots simplifyQtSignalsSlots(); // remove Borland stuff.. simplifyBorland(); // syntax error: enum with typedef in it checkForEnumsWithTypedef(); // Add parentheses to ternary operator where necessary prepareTernaryOpForAST(); // Change initialisation of variable to assignment simplifyInitVar(); // Split up variable declarations. simplifyVarDecl(false); reportUnknownMacros(); // typedef.. if (mTimerResults) { Timer t("Tokenizer::tokenize::simplifyTypedef", mSettings->showtime, mTimerResults); simplifyTypedef(); } else { simplifyTypedef(); } // using A = B; while (simplifyUsing()) ; // Add parentheses to ternary operator where necessary // TODO: this is only necessary if one typedef simplification had a comma and was used within ?: // If typedef handling is refactored and moved to symboldatabase someday we can remove this prepareTernaryOpForAST(); for (Token* tok = list.front(); tok;) { if (Token::Match(tok, "union|struct|class union|struct|class")) tok->deleteNext(); else tok = tok->next(); } // class x y { if (isCPP() && mSettings->severity.isEnabled(Severity::information)) { for (const Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "class %type% %type% [:{]")) { unhandled_macro_class_x_y(tok); } } } // catch bad typedef canonicalization // // to reproduce bad typedef, download upx-ucl from: // http://packages.debian.org/sid/upx-ucl // analyse the file src/stub/src/i386-linux.elf.interp-main.c validate(); // The simplify enum have inner loops if (Settings::terminated()) return false; // Put ^{} statements in asm() simplifyAsm2(); // @.. simplifyAt(); // When the assembly code has been cleaned up, no @ is allowed for (const Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "(") { const Token *tok1 = tok; tok = tok->link(); if (!tok) syntaxError(tok1); } else if (tok->str() == "@") { syntaxError(tok); } } // Order keywords "static" and "const" simplifyStaticConst(); // convert platform dependent types to standard types // 32 bits: size_t -> unsigned long // 64 bits: size_t -> unsigned long long list.simplifyPlatformTypes(); // collapse compound standard types into a single token // unsigned long long int => long (with _isUnsigned=true,_isLong=true) list.simplifyStdType(); if (Settings::terminated()) return false; // simplify bit fields.. simplifyBitfields(); if (Settings::terminated()) return false; // struct simplification "struct S {} s; => struct S { } ; S s ; simplifyStructDecl(); if (Settings::terminated()) return false; // x = ({ 123; }); => { x = 123; } simplifyAssignmentBlock(); if (Settings::terminated()) return false; simplifyVariableMultipleAssign(); // Collapse operator name tokens into single token // operator = => operator= simplifyOperatorName(); // Remove redundant parentheses simplifyRedundantParentheses(); if (isCPP()) simplifyTypeIntrinsics(); if (!isC()) { // Handle templates.. if (mTimerResults) { Timer t("Tokenizer::tokenize::simplifyTemplates", mSettings->showtime, mTimerResults); simplifyTemplates(); } else { simplifyTemplates(); } // The simplifyTemplates have inner loops if (Settings::terminated()) return false; validate(); // #6847 - invalid code } // Simplify pointer to standard types (C only) simplifyPointerToStandardType(); // simplify function pointers simplifyFunctionPointers(); // Change initialisation of variable to assignment simplifyInitVar(); // Split up variable declarations. simplifyVarDecl(false); elseif(); validate(); // #6772 "segmentation fault (invalid code) in Tokenizer::setVarId" if (mTimerResults) { Timer t("Tokenizer::tokenize::setVarId", mSettings->showtime, mTimerResults); setVarId(); } else { setVarId(); } // Link < with > createLinks2(); // Mark C++ casts for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "const_cast|dynamic_cast|reinterpret_cast|static_cast <") && Token::simpleMatch(tok->linkAt(1), "> (")) { tok = tok->linkAt(1)->next(); tok->isCast(true); } } // specify array size arraySize(); // The simplify enum might have inner loops if (Settings::terminated()) return false; // Add std:: in front of std classes, when using namespace std; was given simplifyNamespaceStd(); // Change initialisation of variable to assignment simplifyInitVar(); simplifyDoublePlusAndDoubleMinus(); simplifyArrayAccessSyntax(); Token::assignProgressValues(list.front()); removeRedundantSemicolons(); simplifyRedundantConsecutiveBraces(); simplifyEmptyNamespaces(); simplifyIfSwitchForInit(); simplifyOverloadedOperators(); validate(); list.front()->assignIndexes(); return true; } bool Tokenizer::simplifyTokenList2() { // clear the _functionList so it can't contain dead pointers deleteSymbolDatabase(); // Clear AST,ValueFlow. These will be created again at the end of this function. for (Token *tok = list.front(); tok; tok = tok->next()) { tok->clearAst(); tok->clearValueFlow(); } // Convert e.g. atol("0") into 0 simplifyMathFunctions(); // f(x=g()) => x=g(); f(x) simplifyAssignmentInFunctionCall(); // ";a+=b;" => ";a=a+b;" simplifyCompoundAssignment(); simplifyCharAt(); // simplify references simplifyReference(); simplifyStd(); if (Settings::terminated()) return false; simplifySizeof(); simplifyUndefinedSizeArray(); simplifyCasts(); // Simplify simple calculations before replace constants, this allows the replacement of constants that are calculated // e.g. const static int value = sizeof(X)/sizeof(Y); simplifyCalculations(); if (Settings::terminated()) return false; // Replace "*(ptr + num)" => "ptr[num]" simplifyOffsetPointerDereference(); // Replace "&str[num]" => "(str + num)" simplifyOffsetPointerReference(); removeRedundantAssignment(); simplifyRealloc(); // Change initialisation of variable to assignment simplifyInitVar(); // Simplify variable declarations simplifyVarDecl(false); simplifyErrNoInWhile(); simplifyIfAndWhileAssign(); simplifyRedundantParentheses(); simplifyNestedStrcat(); simplifyFuncInWhile(); simplifyIfAndWhileAssign(); // replace strlen(str) for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "strlen ( %str% )")) { tok->str(MathLib::toString(Token::getStrLength(tok->tokAt(2)))); tok->deleteNext(3); } } bool modified = true; while (modified) { if (Settings::terminated()) return false; modified = false; modified |= simplifyConditions(); modified |= simplifyFunctionReturn(); modified |= simplifyKnownVariables(); modified |= simplifyStrlen(); modified |= removeRedundantConditions(); modified |= simplifyRedundantParentheses(); modified |= simplifyConstTernaryOp(); modified |= simplifyCalculations(); validate(); } // simplify redundant loops simplifyWhile0(); removeRedundantFor(); // Remove redundant parentheses in return.. for (Token *tok = list.front(); tok; tok = tok->next()) { while (Token::simpleMatch(tok, "return (")) { Token *tok2 = tok->next()->link(); if (Token::simpleMatch(tok2, ") ;")) { tok->deleteNext(); tok2->deleteThis(); } else { break; } } } simplifyReturnStrncat(); removeRedundantAssignment(); simplifyComma(); removeRedundantSemicolons(); simplifyFlowControl(); simplifyRedundantConsecutiveBraces(); simplifyEmptyNamespaces(); simplifyMathFunctions(); validate(); Token::assignProgressValues(list.front()); list.front()->assignIndexes(); list.createAst(); // needed for #7208 (garbage code) and #7724 (ast max depth limit) list.validateAst(); // Create symbol database and then remove const keywords createSymbolDatabase(); mSymbolDatabase->setValueTypeInTokenList(true); ValueFlow::setValues(&list, mSymbolDatabase, mErrorLogger, mSettings); if (Settings::terminated()) return false; printDebugOutput(2); return true; } //--------------------------------------------------------------------------- void Tokenizer::printDebugOutput(int simplification) const { const bool debug = (simplification != 1U && mSettings->debugSimplified) || (simplification != 2U && mSettings->debugnormal); if (debug && list.front()) { list.front()->printOut(nullptr, list.getFiles()); if (mSettings->xml) std::cout << "" << std::endl; if (mSymbolDatabase) { if (mSettings->xml) mSymbolDatabase->printXml(std::cout); else if (mSettings->verbose) { mSymbolDatabase->printOut("Symbol database"); } } if (mSettings->verbose) list.front()->printAst(mSettings->verbose, mSettings->xml, list.getFiles(), std::cout); list.front()->printValueFlow(mSettings->xml, std::cout); if (mSettings->xml) std::cout << "" << std::endl; } if (mSymbolDatabase && simplification == 2U && mSettings->debugwarnings) { printUnknownTypes(); // the typeStartToken() should come before typeEndToken() for (const Variable *var : mSymbolDatabase->variableList()) { if (!var) continue; const Token * typetok = var->typeStartToken(); while (typetok && typetok != var->typeEndToken()) typetok = typetok->next(); if (typetok != var->typeEndToken()) { reportError(var->typeStartToken(), Severity::debug, "debug", "Variable::typeStartToken() of variable '" + var->name() + "' is not located before Variable::typeEndToken(). The location of the typeStartToken() is '" + var->typeStartToken()->str() + "' at line " + MathLib::toString(var->typeStartToken()->linenr())); } } } } void Tokenizer::dump(std::ostream &out) const { // Create a xml data dump. // The idea is not that this will be readable for humans. It's a // data dump that 3rd party tools could load and get useful info from. // tokens.. out << " " << std::endl; for (const Token *tok = list.front(); tok; tok = tok->next()) { out << " linenr() << "\" column=\"" << tok->column() << "\""; out << " str=\"" << ErrorLogger::toxml(tok->str()) << '\"'; out << " scope=\"" << tok->scope() << '\"'; if (tok->isName()) { out << " type=\"name\""; if (tok->isUnsigned()) out << " isUnsigned=\"true\""; else if (tok->isSigned()) out << " isSigned=\"true\""; } else if (tok->isNumber()) { out << " type=\"number\""; if (MathLib::isInt(tok->str())) out << " isInt=\"true\""; if (MathLib::isFloat(tok->str())) out << " isFloat=\"true\""; } else if (tok->tokType() == Token::eString) out << " type=\"string\" strlen=\"" << Token::getStrLength(tok) << '\"'; else if (tok->tokType() == Token::eChar) out << " type=\"char\""; else if (tok->isBoolean()) out << " type=\"boolean\""; else if (tok->isOp()) { out << " type=\"op\""; if (tok->isArithmeticalOp()) out << " isArithmeticalOp=\"true\""; else if (tok->isAssignmentOp()) out << " isAssignmentOp=\"true\""; else if (tok->isComparisonOp()) out << " isComparisonOp=\"true\""; else if (tok->tokType() == Token::eLogicalOp) out << " isLogicalOp=\"true\""; } if (tok->isExpandedMacro()) out << " isExpandedMacro=\"true\""; if (tok->isSplittedVarDeclComma()) out << " isSplittedVarDeclComma=\"true\""; if (tok->isSplittedVarDeclEq()) out << " isSplittedVarDeclEq=\"true\""; if (tok->isImplicitInt()) out << " isImplicitInt=\"true\""; if (tok->link()) out << " link=\"" << tok->link() << '\"'; if (tok->varId() > 0) out << " varId=\"" << MathLib::toString(tok->varId()) << '\"'; if (tok->variable()) out << " variable=\"" << tok->variable() << '\"'; if (tok->function()) out << " function=\"" << tok->function() << '\"'; if (!tok->values().empty()) out << " values=\"" << &tok->values() << '\"'; if (tok->type()) out << " type-scope=\"" << tok->type()->classScope << '\"'; if (tok->astParent()) out << " astParent=\"" << tok->astParent() << '\"'; if (tok->astOperand1()) out << " astOperand1=\"" << tok->astOperand1() << '\"'; if (tok->astOperand2()) out << " astOperand2=\"" << tok->astOperand2() << '\"'; if (!tok->originalName().empty()) out << " originalName=\"" << tok->originalName() << '\"'; if (tok->valueType()) { const std::string vt = tok->valueType()->dump(); if (!vt.empty()) out << ' ' << vt; } if (!tok->varId() && tok->scope()->isExecutable() && Token::Match(tok, "%name% (")) { if (mSettings->library.isnoreturn(tok)) out << " noreturn=\"true\""; } out << "/>" << std::endl; } out << " " << std::endl; mSymbolDatabase->printXml(out); if (list.front()) list.front()->printValueFlow(true, out); if (!mTypedefInfo.empty()) { out << " " << std::endl; for (const TypedefInfo &typedefInfo: mTypedefInfo) { out << " " << std::endl; } out << " " << std::endl; } } void Tokenizer::simplifyHeadersAndUnusedTemplates() { if (mSettings->checkHeaders && mSettings->checkUnusedTemplates) // Full analysis. All information in the headers are kept. return; const bool checkHeaders = mSettings->checkHeaders; const bool removeUnusedIncludedFunctions = !mSettings->checkHeaders; const bool removeUnusedIncludedClasses = !mSettings->checkHeaders; const bool removeUnusedIncludedTemplates = !mSettings->checkUnusedTemplates || !mSettings->checkHeaders; const bool removeUnusedTemplates = !mSettings->checkUnusedTemplates; // checkHeaders: // // If it is true then keep all code in the headers. It's possible // to remove unused types/variables if false positives / false // negatives can be avoided. // // If it is false, then we want to remove selected stuff from the // headers but not *everything*. The intention here is to not damage // the analysis of the source file. You should get all warnings in // the source file. You should not get false positives. // functions and types to keep std::set keep; for (const Token *tok = list.front(); tok; tok = tok->next()) { if (isCPP() && Token::simpleMatch(tok, "template <")) { const Token *closingBracket = tok->next()->findClosingBracket(); if (Token::Match(closingBracket, "> class|struct %name% {")) tok = closingBracket->linkAt(3); } if (!tok->isName() || tok->isKeyword()) continue; if (!checkHeaders && tok->fileIndex() != 0) continue; if (Token::Match(tok, "%name% (") && !Token::simpleMatch(tok->linkAt(1), ") {")) { keep.insert(tok->str()); continue; } if (Token::Match(tok, "%name% %name%|::|*|&|<")) { keep.insert(tok->str()); } } const std::set functionStart{"static", "const", "unsigned", "signed", "void", "bool", "char", "short", "int", "long", "float", "*"}; for (Token *tok = list.front(); tok; tok = tok->next()) { const bool isIncluded = (tok->fileIndex() != 0); // Remove executable code if (isIncluded && !mSettings->checkHeaders && tok->str() == "{") { // TODO: We probably need to keep the executable code if this function is called from the source file. const Token *prev = tok->previous(); while (prev && prev->isName()) prev = prev->previous(); if (Token::simpleMatch(prev, ")")) { // Replace all tokens from { to } with a ";". Token::eraseTokens(tok,tok->link()->next()); tok->str(";"); tok->link(nullptr); } } if (!tok->previous() || Token::Match(tok->previous(), "[;{}]")) { // Remove unused function declarations if (isIncluded && removeUnusedIncludedFunctions) { while (true) { Token *start = tok; while (start && functionStart.find(start->str()) != functionStart.end()) start = start->next(); if (Token::Match(start, "%name% (") && Token::Match(start->linkAt(1), ") const| ;") && keep.find(start->str()) == keep.end()) { Token::eraseTokens(tok, start->linkAt(1)->tokAt(2)); tok->deleteThis(); } else break; } } if (isIncluded && removeUnusedIncludedClasses) { if (Token::Match(tok, "class|struct %name% [:{]") && keep.find(tok->strAt(1)) == keep.end()) { // Remove this class/struct const Token *endToken = tok->tokAt(2); if (endToken->str() == ":") { endToken = endToken->next(); while (Token::Match(endToken, "%name%|,")) endToken = endToken->next(); } if (endToken && endToken->str() == "{" && Token::simpleMatch(endToken->link(), "} ;")) { Token::eraseTokens(tok, endToken->link()->next()); tok->deleteThis(); } } } if (removeUnusedTemplates || (isIncluded && removeUnusedIncludedTemplates)) { if (Token::Match(tok, "template < %name%")) { const Token *closingBracket = tok->next()->findClosingBracket(); if (Token::Match(closingBracket, "> class|struct %name% [;:{]") && keep.find(closingBracket->strAt(2)) == keep.end()) { const Token *endToken = closingBracket->tokAt(3); if (endToken->str() == ":") { endToken = endToken->next(); while (Token::Match(endToken, "%name%|,")) endToken = endToken->next(); } if (endToken && endToken->str() == "{") endToken = endToken->link()->next(); if (endToken && endToken->str() == ";") { Token::eraseTokens(tok, endToken); tok->deleteThis(); } } else if (Token::Match(closingBracket, "> %type% %name% (") && Token::simpleMatch(closingBracket->linkAt(3), ") {") && keep.find(closingBracket->strAt(2)) == keep.end()) { const Token *endToken = closingBracket->linkAt(3)->linkAt(1)->next(); Token::eraseTokens(tok, endToken); tok->deleteThis(); } } } } } } void Tokenizer::removeExtraTemplateKeywords() { if (isCPP()) { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%name%|>|) .|:: template %name%")) { tok->next()->deleteNext(); Token* templateName = tok->tokAt(2); while (Token::Match(templateName, "%name%|::")) { templateName->isTemplate(true); templateName = templateName->next(); } if (Token::Match(templateName->previous(), "operator %op%|(")) { templateName->isTemplate(true); if (templateName->str() == "(" && templateName->link()) templateName->link()->isTemplate(true); } } } } } static std::string getExpression(const Token *tok) { std::string line; for (const Token *prev = tok->previous(); prev && !Token::Match(prev, "[;{}]"); prev = prev->previous()) line = prev->str() + " " + line; line += "!!!" + tok->str() + "!!!"; for (const Token *next = tok->next(); next && !Token::Match(next, "[;{}]"); next = next->next()) line = line + " " + next->str(); return line; } void Tokenizer::splitTemplateRightAngleBrackets(bool check) { std::set vars; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] %type% %type% [;,=]") && tok->next()->isStandardType()) vars.insert(tok->strAt(2)); // Ticket #6181: normalize C++11 template parameter list closing syntax if (tok->previous() && tok->str() == "<" && TemplateSimplifier::templateParameters(tok) && vars.find(tok->previous()->str()) == vars.end()) { Token *endTok = tok->findClosingBracket(); if (check) { if (Token::Match(endTok, ">>|>>=")) reportError(tok, Severity::debug, "dacaWrongSplitTemplateRightAngleBrackets", "bad closing bracket for !!!str() == ">>") { endTok->str(">"); endTok->insertToken(">"); } else if (endTok && endTok->str() == ">>=") { endTok->str(">"); endTok->insertToken("="); endTok->insertToken(">"); } } else if (Token::Match(tok, "class|struct|union|=|:|public|protected|private %name% <") && vars.find(tok->next()->str()) == vars.end()) { Token *endTok = tok->tokAt(2)->findClosingBracket(); if (check) { if (Token::simpleMatch(endTok, ">>")) reportError(tok, Severity::debug, "dacaWrongSplitTemplateRightAngleBrackets", "bad closing bracket for !!!> ;|{|%type%")) { endTok->str(">"); endTok->insertToken(">"); } } } } void Tokenizer::removeMacrosInGlobalScope() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "(") { tok = tok->link(); if (Token::Match(tok, ") %type% {") && !Token::Match(tok->next(), "const|namespace|class|struct|union|noexcept|override|final|volatile")) tok->deleteNext(); } if (Token::Match(tok, "%type%") && tok->isUpperCaseName() && (!tok->previous() || Token::Match(tok->previous(), "[;{}]") || (tok->previous()->isName() && endsWith(tok->previous()->str(), ':')))) { const Token *tok2 = tok->next(); if (tok2 && tok2->str() == "(") tok2 = tok2->link()->next(); // Several unknown macros... while (Token::Match(tok2, "%type% (") && tok2->isUpperCaseName()) tok2 = tok2->linkAt(1)->next(); if (Token::Match(tok, "%name% (") && Token::Match(tok2, "%name% *|&|::|<| %name%") && !Token::Match(tok2, "namespace|class|struct|union|private:|protected:|public:")) unknownMacroError(tok); if (Token::Match(tok, "%type% (") && Token::Match(tok2, "%type% (") && !Token::Match(tok2, "noexcept|throw") && isFunctionHead(tok2->next(), ":;{")) unknownMacroError(tok); // remove unknown macros before namespace|class|struct|union if (Token::Match(tok2, "namespace|class|struct|union")) { // is there a "{" for? const Token *tok3 = tok2; while (tok3 && !Token::Match(tok3,"[;{}()]")) tok3 = tok3->next(); if (tok3 && tok3->str() == "{") { Token::eraseTokens(tok, tok2); tok->deleteThis(); } continue; } // replace unknown macros before foo( /* if (Token::Match(tok2, "%type% (") && isFunctionHead(tok2->next(), "{")) { std::string typeName; for (const Token* tok3 = tok; tok3 != tok2; tok3 = tok3->next()) typeName += tok3->str(); Token::eraseTokens(tok, tok2); tok->str(typeName); } */ // remove unknown macros before foo::foo( if (Token::Match(tok2, "%type% :: %type%")) { const Token *tok3 = tok2; while (Token::Match(tok3, "%type% :: %type% ::")) tok3 = tok3->tokAt(2); if (Token::Match(tok3, "%type% :: %type% (") && tok3->str() == tok3->strAt(2)) { Token::eraseTokens(tok, tok2); tok->deleteThis(); } continue; } } // Skip executable scopes if (tok->str() == "{") { const Token *prev = tok->previous(); while (prev && prev->isName()) prev = prev->previous(); if (prev && prev->str() == ")") tok = tok->link(); } } } //--------------------------------------------------------------------------- void Tokenizer::removePragma() { if (isC() && mSettings->standards.c == Standards::C89) return; if (isCPP() && mSettings->standards.cpp == Standards::CPP03) return; for (Token *tok = list.front(); tok; tok = tok->next()) { while (Token::simpleMatch(tok, "_Pragma (")) { Token::eraseTokens(tok, tok->linkAt(1)->next()); tok->deleteThis(); } } } //--------------------------------------------------------------------------- void Tokenizer::removeMacroInClassDef() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "class|struct %name% %name% {|:")) continue; const bool nextIsUppercase = tok->next()->isUpperCaseName(); const bool afterNextIsUppercase = tok->tokAt(2)->isUpperCaseName(); if (nextIsUppercase && !afterNextIsUppercase) tok->deleteNext(); else if (!nextIsUppercase && afterNextIsUppercase) tok->next()->deleteNext(); } } //--------------------------------------------------------------------------- void Tokenizer::removeMacroInVarDecl() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] %name% (") && tok->next()->isUpperCaseName()) { // goto ')' parentheses const Token *tok2 = tok; int parlevel = 0; while (tok2) { if (tok2->str() == "(") ++parlevel; else if (tok2->str() == ")") { if (--parlevel <= 0) break; } tok2 = tok2->next(); } tok2 = tok2 ? tok2->next() : nullptr; // check if this is a variable declaration.. const Token *tok3 = tok2; while (tok3 && tok3->isUpperCaseName()) tok3 = tok3->next(); if (tok3 && (tok3->isStandardType() || Token::Match(tok3,"const|static|struct|union|class"))) Token::eraseTokens(tok,tok2); } } } //--------------------------------------------------------------------------- void Tokenizer::addSemicolonAfterUnknownMacro() { if (!isCPP()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != ")") continue; const Token *macro = tok->link() ? tok->link()->previous() : nullptr; if (!macro || !macro->isName()) continue; if (Token::simpleMatch(tok, ") try") && !Token::Match(macro, "if|for|while")) tok->insertToken(";"); else if (Token::simpleMatch(tok, ") using")) tok->insertToken(";"); } } //--------------------------------------------------------------------------- void Tokenizer::removeRedundantAssignment() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "{") tok = tok->link(); const Token * const start = const_cast(startOfExecutableScope(tok)); if (start) { tok = start->previous(); // parse in this function.. std::set localvars; const Token * const end = tok->next()->link(); for (Token * tok2 = tok->next(); tok2 && tok2 != end; tok2 = tok2->next()) { // skip local class or struct if (Token::Match(tok2, "class|struct %type% {|:")) { // skip to '{' tok2 = tok2->tokAt(2); while (tok2 && tok2->str() != "{") tok2 = tok2->next(); if (tok2) tok2 = tok2->link(); // skip local class or struct else return; } else if (Token::Match(tok2, "[;{}] %type% * %name% ;") && tok2->next()->str() != "return") { tok2 = tok2->tokAt(3); localvars.insert(tok2->varId()); } else if (Token::Match(tok2, "[;{}] %type% %name% ;") && tok2->next()->isStandardType()) { tok2 = tok2->tokAt(2); localvars.insert(tok2->varId()); } else if (tok2->varId() && !Token::Match(tok2->previous(), "[;{}] %name% = %char%|%num%|%name% ;")) { localvars.erase(tok2->varId()); } } localvars.erase(0); if (!localvars.empty()) { for (Token *tok2 = tok->next(); tok2 && tok2 != end;) { if (Token::Match(tok2, "[;{}] %type% %name% ;") && localvars.find(tok2->tokAt(2)->varId()) != localvars.end()) { tok2->deleteNext(3); } else if ((Token::Match(tok2, "[;{}] %type% * %name% ;") && localvars.find(tok2->tokAt(3)->varId()) != localvars.end()) || (Token::Match(tok2, "[;{}] %name% = %any% ;") && localvars.find(tok2->next()->varId()) != localvars.end())) { tok2->deleteNext(4); } else tok2 = tok2->next(); } } } } } void Tokenizer::simplifyRealloc() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "(|[") || (tok->str() == "{" && tok->previous() && tok->previous()->str() == "=")) tok = tok->link(); else if (Token::Match(tok, "[;{}] %name% = realloc (")) { tok = tok->tokAt(3); if (Token::simpleMatch(tok->next(), "( 0 ,")) { //no "x = realloc(0,);" if (!Token::simpleMatch(tok->next()->link(), ") ;") || tok->next()->link()->previous() == tok->tokAt(3)) continue; // delete "0 ," tok->next()->deleteNext(2); // Change function name "realloc" to "malloc" tok->str("malloc"); tok = tok->next()->link(); } else { Token *tok2 = tok->next()->link()->tokAt(-2); //no "x = realloc(,0);" if (!Token::simpleMatch(tok2, ", 0 ) ;") || tok2 == tok->tokAt(2)) continue; //remove ", 0" tok2 = tok2->previous(); tok2->deleteNext(2); //change "realloc" to "free" tok->str("free"); //insert "0" after "var =" tok = tok->previous(); tok->insertToken("0"); //move "var = 0" between "free(...)" and ";" tok2 = tok2->next(); Token::move(tok->previous(), tok->next(), tok2); //add missing ";" after "free(...)" tok2->insertToken(";"); //goto before last ";" and continue tok = tok->next(); } } } } void Tokenizer::simplifyEmptyNamespaces() { if (isC()) return; bool goback = false; for (Token *tok = list.front(); tok; tok = tok ? tok->next() : nullptr) { if (goback) { tok = tok->previous(); goback = false; } if (Token::Match(tok, "(|[|{")) { tok = tok->link(); continue; } if (!Token::Match(tok, "namespace %name%| {")) continue; bool isAnonymousNS = tok->strAt(1) == "{"; if (tok->strAt(3 - isAnonymousNS) == "}") { tok->deleteNext(3 - isAnonymousNS); // remove '%name%| { }' if (!tok->previous()) { // remove 'namespace' or replace it with ';' if isolated tok->deleteThis(); goback = true; } else { // '%any% namespace %any%' tok = tok->previous(); // goto previous token tok->deleteNext(); // remove next token: 'namespace' if (tok->str() == "{") { // Go back in case we were within a namespace that's empty now tok = tok->tokAt(-2) ? tok->tokAt(-2) : tok->previous(); goback = true; } } } else { tok = tok->tokAt(2 - isAnonymousNS); } } } void Tokenizer::simplifyFlowControl() { for (Token *begin = list.front(); begin; begin = begin->next()) { if (Token::Match(begin, "(|[") || (begin->str() == "{" && begin->previous() && begin->strAt(-1) == "=")) begin = begin->link(); //function scope if (!Token::simpleMatch(begin, ") {") && !Token::Match(begin, ") %name% {")) continue; Token* end = begin->linkAt(1+(begin->next()->str() == "{" ? 0 : 1)); int indentLevel = 0; bool stilldead = false; for (Token *tok = begin; tok && tok != end; tok = tok->next()) { if (Token::Match(tok, "(|[")) { tok = tok->link(); continue; } if (tok->str() == "{") { if (tok->previous() && tok->previous()->str() == "=") { tok = tok->link(); continue; } ++indentLevel; } else if (tok->str() == "}") { if (indentLevel == 0) break; --indentLevel; if (stilldead) { eraseDeadCode(tok, nullptr); if (indentLevel == 1 || tok->next()->str() != "}" || !Token::Match(tok->next()->link()->previous(), ";|{|}|do {")) stilldead = false; continue; } } if (indentLevel == 0) continue; if (Token::Match(tok,"continue|break ;")) { tok = tok->next(); eraseDeadCode(tok, nullptr); } else if (Token::Match(tok,"return|goto") || (Token::Match(tok->previous(), "[;{}] %name% (") && mSettings->library.isnoreturn(tok)) || (isCPP() && tok->str() == "throw")) { if (tok->next()->str() == "}") syntaxError(tok->next()); // invalid code like in #6731 //TODO: ensure that we exclude user-defined 'exit|abort|throw', except for 'noreturn' //catch the first ';' for (Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) { if (Token::Match(tok2, "(|[")) { tok2 = tok2->link(); } else if (tok2->str() == ";") { tok = tok2; eraseDeadCode(tok, nullptr); break; } else if (Token::Match(tok2, "[{}]")) break; } //if everything is removed, then remove also the code after an inferior scope //only if the actual scope is not special if (indentLevel > 1 && tok->next()->str() == "}" && Token::Match(tok->next()->link()->previous(), ";|{|}|do {")) stilldead = true; } } begin = end; } } bool Tokenizer::removeRedundantConditions() { // Return value for function. Set to true if there are any simplifications bool ret = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "if ( %bool% ) {")) continue; // Find matching else Token *elseTag = tok->linkAt(4)->next(); const bool boolValue = (tok->strAt(2) == "true"); // Handle if with else if (Token::simpleMatch(elseTag, "else {")) { // Handle else if (!boolValue) { // Convert "if( false ) {aaa;} else {bbb;}" => "{bbb;}" //remove '(false)' tok->deleteNext(3); //delete dead code inside scope eraseDeadCode(tok, elseTag); //remove 'else' elseTag->deleteThis(); //remove 'if' tok->deleteThis(); } else { // Convert "if( true ) {aaa;} else {bbb;}" => "{aaa;}" const Token *end = elseTag->next()->link()->next(); // Remove "else { bbb; }" elseTag = elseTag->previous(); eraseDeadCode(elseTag, end); // Remove "if( true )" tok->deleteNext(3); tok->deleteThis(); } ret = true; } // Handle if without else else { if (!boolValue) { //remove '(false)' tok->deleteNext(3); //delete dead code inside scope eraseDeadCode(tok, elseTag); //remove 'if' tok->deleteThis(); } else { // convert "if( true ) {aaa;}" => "{aaa;}" tok->deleteNext(3); tok->deleteThis(); } ret = true; } } return ret; } void Tokenizer::removeRedundantFor() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] for ( %name% = %num% ; %name% < %num% ; ++| %name% ++| ) {") || Token::Match(tok, "[;{}] for ( %type% %name% = %num% ; %name% < %num% ; ++| %name% ++| ) {")) { // Same variable name.. const Token* varTok = tok->tokAt(3); const bool type = varTok->next()->isName(); if (type) varTok = varTok->next(); const std::string varname(varTok->str()); const int varid(varTok->varId()); if (varname != varTok->strAt(4)) continue; const Token *vartok2 = tok->linkAt(2)->previous(); if (vartok2->str() == "++") vartok2 = vartok2->previous(); else if (vartok2->strAt(-1) != "++") continue; if (varname != vartok2->str()) continue; // Check that the difference of the numeric values is 1 const MathLib::bigint num1(MathLib::toLongNumber(varTok->strAt(2))); const MathLib::bigint num2(MathLib::toLongNumber(varTok->strAt(6))); if (num1 + 1 != num2) continue; // check how loop variable is used in loop.. bool read = false; bool write = false; const Token* end = tok->linkAt(2)->next()->link(); for (const Token *tok2 = tok->linkAt(2); tok2 != end; tok2 = tok2->next()) { if (tok2->str() == varname) { if (tok2->previous()->isArithmeticalOp() && tok2->next() && (tok2->next()->isArithmeticalOp() || tok2->next()->str() == ";")) { read = true; } else { read = write = true; break; } } } // Simplify loop if loop variable isn't written if (!write) { Token* bodyBegin = tok->linkAt(2)->next(); // remove "for (" tok->deleteNext(2); // If loop variable is read then keep assignment before // loop body.. if (type) { tok->insertToken("{"); Token::createMutualLinks(tok->next(), bodyBegin->link()); bodyBegin->deleteThis(); tok = tok->tokAt(6); } else if (read) { // goto ";" tok = tok->tokAt(4); } else { // remove "x = 0 ;" tok->deleteNext(4); } // remove "x < 1 ; x ++ )" tok->deleteNext(7); if (!type) { // Add assignment after the loop body so the loop variable // get the correct end value Token *tok2 = tok->next()->link(); tok2->insertToken(";"); tok2->insertToken(MathLib::toString(num2)); tok2->insertToken("="); tok2->insertToken(varname); tok2->next()->varId(varid); } } } } } void Tokenizer::removeRedundantSemicolons() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->link() && tok->str() == "(") { tok = tok->link(); continue; } for (;;) { if (Token::simpleMatch(tok, "; ;")) { tok->deleteNext(); } else if (Token::simpleMatch(tok, "; { ; }")) { tok->deleteNext(3); } else { break; } } } } bool Tokenizer::simplifyAddBraces() { for (Token *tok = list.front(); tok; tok = tok->next()) { Token const * tokRet=simplifyAddBracesToCommand(tok); if (!tokRet) return false; } return true; } Token *Tokenizer::simplifyAddBracesToCommand(Token *tok) { Token * tokEnd=tok; if (Token::Match(tok,"for|switch|BOOST_FOREACH")) { tokEnd=simplifyAddBracesPair(tok,true); } else if (tok->str()=="while") { Token *tokPossibleDo=tok->previous(); if (Token::simpleMatch(tok->previous(), "{")) tokPossibleDo = nullptr; else if (Token::simpleMatch(tokPossibleDo,"}")) tokPossibleDo = tokPossibleDo->link(); if (!tokPossibleDo || tokPossibleDo->strAt(-1) != "do") tokEnd=simplifyAddBracesPair(tok,true); } else if (tok->str()=="do") { tokEnd=simplifyAddBracesPair(tok,false); if (tokEnd!=tok) { // walk on to next token, i.e. "while" // such that simplifyAddBracesPair does not close other braces // before the "while" if (tokEnd) { tokEnd=tokEnd->next(); if (!tokEnd || tokEnd->str()!="while") // no while syntaxError(tok); } } } else if (tok->str()=="if" && !Token::simpleMatch(tok->tokAt(-2), "operator \"\"")) { tokEnd=simplifyAddBracesPair(tok,true); if (!tokEnd) return nullptr; if (tokEnd->strAt(1) == "else") { Token * tokEndNextNext= tokEnd->tokAt(2); if (!tokEndNextNext || tokEndNextNext->str() == "}") syntaxError(tokEndNextNext); if (tokEndNextNext->str() == "if") // do not change "else if ..." to "else { if ... }" tokEnd=simplifyAddBracesToCommand(tokEndNextNext); else tokEnd=simplifyAddBracesPair(tokEnd->next(),false); } } return tokEnd; } Token *Tokenizer::simplifyAddBracesPair(Token *tok, bool commandWithCondition) { Token * tokCondition=tok->next(); if (!tokCondition) // Missing condition return tok; Token *tokAfterCondition=tokCondition; if (commandWithCondition) { if (tokCondition->str()=="(") tokAfterCondition=tokCondition->link(); else syntaxError(tok); // Bad condition if (!tokAfterCondition || tokAfterCondition->strAt(1) == "]") syntaxError(tok); // Bad condition tokAfterCondition=tokAfterCondition->next(); if (!tokAfterCondition || Token::Match(tokAfterCondition, ")|}|,")) { // No tokens left where to add braces around return tok; } } // Skip labels Token * tokStatement = tokAfterCondition; while (true) { if (Token::Match(tokStatement, "%name% :")) tokStatement = tokStatement->tokAt(2); else if (tokStatement->str() == "case") { tokStatement = skipCaseLabel(tokStatement); if (!tokStatement) return tok; if (tokStatement->str() != ":") syntaxError(tokStatement); tokStatement = tokStatement->next(); } else break; if (!tokStatement) return tok; } Token * tokBracesEnd=nullptr; if (tokStatement->str() == "{") { // already surrounded by braces if (tokStatement != tokAfterCondition) { // Move the opening brace before labels Token::move(tokStatement, tokStatement, tokAfterCondition->previous()); } tokBracesEnd = tokStatement->link(); } else if (Token::simpleMatch(tokStatement, "try {") && Token::simpleMatch(tokStatement->linkAt(1), "} catch (")) { tokAfterCondition->previous()->insertToken("{"); Token * tokOpenBrace = tokAfterCondition->previous(); Token * tokEnd = tokStatement->linkAt(1)->linkAt(2)->linkAt(1); if (!tokEnd) { syntaxError(tokStatement); } tokEnd->insertToken("}"); Token * tokCloseBrace = tokEnd->next(); Token::createMutualLinks(tokOpenBrace, tokCloseBrace); tokBracesEnd = tokCloseBrace; } else { Token * tokEnd = simplifyAddBracesToCommand(tokStatement); if (!tokEnd) // Ticket #4887 return tok; if (tokEnd->str()!="}") { // Token does not end with brace // Look for ; to add own closing brace after it while (tokEnd && !Token::Match(tokEnd, ";|)|}")) { if (tokEnd->tokType()==Token::eBracket || tokEnd->str() == "(") { tokEnd = tokEnd->link(); if (!tokEnd) { // Inner bracket does not close return tok; } } tokEnd=tokEnd->next(); } if (!tokEnd || tokEnd->str() != ";") { // No trailing ; return tok; } } tokAfterCondition->previous()->insertToken("{"); Token * tokOpenBrace=tokAfterCondition->previous(); tokEnd->insertToken("}"); Token * tokCloseBrace=tokEnd->next(); Token::createMutualLinks(tokOpenBrace,tokCloseBrace); tokBracesEnd=tokCloseBrace; } return tokBracesEnd; } void Tokenizer::simplifyCompoundAssignment() { // Simplify compound assignments: // "a+=b" => "a = a + b" for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "[;{}] (| *| (| %name%")) continue; if (tok->next()->str() == "return") continue; // backup current token.. Token * const tok1 = tok; if (tok->next()->str() == "*") tok = tok->next(); if (tok->next() && tok->next()->str() == "(") { tok = tok->next()->link()->next(); } else { // variable.. tok = tok->tokAt(2); while (Token::Match(tok, ". %name%") || Token::Match(tok, "[|(")) { if (tok->str() == ".") tok = tok->tokAt(2); else { // goto "]" or ")" tok = tok->link(); // goto next token.. tok = tok ? tok->next() : nullptr; } } } if (!tok) break; // Is current token at a compound assignment: +=|-=|.. ? const std::string &str = tok->str(); std::string op; // operator used in assignment if (tok->isAssignmentOp() && str.size() == 2) op = str.substr(0, 1); else if (tok->isAssignmentOp() && str.size() == 3) op = str.substr(0, 2); else { tok = tok1; continue; } // Remove the whole statement if it says: "+=0;", "-=0;", "*=1;" or "/=1;" if (Token::Match(tok, "+=|-= 0 ;") || Token::simpleMatch(tok, "|= 0 ;") || Token::Match(tok, "*=|/= 1 ;")) { tok = tok1; while (tok->next()->str() != ";") tok->deleteNext(); } else { // Enclose the rhs in parentheses.. if (!Token::Match(tok->tokAt(2), "[;)]")) { // Only enclose rhs in parentheses if there is some operator bool someOperator = false; for (Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) { if (tok2->link() && Token::Match(tok2, "{|[|(")) tok2 = tok2->link(); if (Token::Match(tok2->next(), "[;)]")) { if (someOperator) { tok->insertToken("("); tok2->insertToken(")"); Token::createMutualLinks(tok->next(), tok2->next()); } break; } someOperator |= (tok2->isOp() || tok2->str() == "?"); } } // simplify the compound assignment.. tok->str("="); tok->insertToken(op); std::stack tokend; for (Token *tok2 = tok->previous(); tok2 && tok2 != tok1; tok2 = tok2->previous()) { // Don't duplicate ++ and --. Put preincrement in lhs. Put // postincrement in rhs. if (tok2->tokType() == Token::eIncDecOp) { // pre increment/decrement => don't copy if (tok2->next()->isName()) { continue; } // post increment/decrement => move from lhs to rhs tok->insertToken(tok2->str()); tok2->deleteThis(); continue; } // Copy token from lhs to rhs tok->insertToken(tok2->str()); tok->next()->varId(tok2->varId()); if (Token::Match(tok->next(), "]|)|}")) tokend.push(tok->next()); else if (Token::Match(tok->next(), "(|[|{")) { Token::createMutualLinks(tok->next(), tokend.top()); tokend.pop(); } } } } } bool Tokenizer::simplifyConditions() { bool ret = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "! %bool%|%num%")) { tok->deleteThis(); if (Token::Match(tok, "0|false")) tok->str("true"); else tok->str("false"); ret = true; } if (Token::simpleMatch(tok, "&& true &&")) { tok->deleteNext(2); ret = true; } else if (Token::simpleMatch(tok, "|| false ||")) { tok->deleteNext(2); ret = true; } else if (Token::Match(tok, "(|&& true && true &&|)")) { tok->deleteNext(2); ret = true; } else if (Token::Match(tok, "%oror%|( false %oror% false %oror%|)")) { tok->deleteNext(2); ret = true; } else if (Token::simpleMatch(tok, "( true ||") || Token::simpleMatch(tok, "( false &&")) { Token::eraseTokens(tok->next(), tok->link()); ret = true; } else if (Token::simpleMatch(tok, "|| true )") || Token::simpleMatch(tok, "&& false )")) { tok = tok->next(); Token::eraseTokens(tok->next()->link(), tok); ret = true; } else if (Token::simpleMatch(tok, "&& false &&") || Token::simpleMatch(tok, "|| true ||")) { //goto '(' Token *tok2 = tok; while (tok2 && tok2->previous()) { if (tok2->previous()->str() == ")") tok2 = tok2->previous()->link(); else { tok2 = tok2->previous(); if (tok2->str() == "(") break; } } if (!tok2) continue; //move tok to 'true|false' position tok = tok->next(); //remove everything before 'true|false' Token::eraseTokens(tok2, tok); //remove everything after 'true|false' Token::eraseTokens(tok, tok2->link()); ret = true; } // Change numeric constant in condition to "true" or "false" if (Token::Match(tok, "if|while ( %num% )|%oror%|&&")) { tok->tokAt(2)->str((tok->strAt(2) != "0") ? "true" : "false"); ret = true; } if (Token::Match(tok, "&&|%oror% %num% )|%oror%|&&")) { tok->next()->str((tok->next()->str() != "0") ? "true" : "false"); ret = true; } // Reduce "(%num% == %num%)" => "(true)"/"(false)" if (Token::Match(tok, "&&|%oror%|(") && (Token::Match(tok->next(), "%num% %any% %num%") || Token::Match(tok->next(), "%bool% %any% %bool%")) && Token::Match(tok->tokAt(4), "&&|%oror%|)|?")) { std::string cmp = tok->strAt(2); bool result = false; if (tok->next()->isNumber()) { // Compare numbers if (cmp == "==" || cmp == "!=") { const std::string& op1(tok->next()->str()); const std::string& op2(tok->strAt(3)); bool eq = false; if (MathLib::isInt(op1) && MathLib::isInt(op2)) eq = (MathLib::toLongNumber(op1) == MathLib::toLongNumber(op2)); else { eq = (op1 == op2); // It is inconclusive whether two unequal float representations are numerically equal if (!eq && MathLib::isFloat(op1)) cmp.clear(); } if (cmp == "==") result = eq; else result = !eq; } else { const double op1 = MathLib::toDoubleNumber(tok->next()->str()); const double op2 = MathLib::toDoubleNumber(tok->strAt(3)); if (cmp == ">=") result = (op1 >= op2); else if (cmp == ">") result = (op1 > op2); else if (cmp == "<=") result = (op1 <= op2); else if (cmp == "<") result = (op1 < op2); else cmp.clear(); } } else { // Compare boolean const bool op1 = (tok->next()->str() == std::string("true")); const bool op2 = (tok->strAt(3) == std::string("true")); if (cmp == "==") result = (op1 == op2); else if (cmp == "!=") result = (op1 != op2); else if (cmp == ">=") result = (op1 >= op2); else if (cmp == ">") result = (op1 > op2); else if (cmp == "<=") result = (op1 <= op2); else if (cmp == "<") result = (op1 < op2); else cmp.clear(); } if (!cmp.empty()) { tok = tok->next(); tok->deleteNext(2); tok->str(result ? "true" : "false"); ret = true; } } } return ret; } bool Tokenizer::simplifyConstTernaryOp() { bool ret = false; const Token *templateParameterEnd = nullptr; // The end of the current template parameter list, if any for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "<" && TemplateSimplifier::templateParameters(tok)) templateParameterEnd = tok->findClosingBracket(); if (tok == templateParameterEnd) templateParameterEnd = nullptr; // End of the current template parameter list if (tok->str() != "?") continue; if (!Token::Match(tok->tokAt(-2), "<|=|,|(|[|{|}|;|case|return %bool%|%num%") && !Token::Match(tok->tokAt(-4), "<|=|,|(|[|{|}|;|case|return ( %bool%|%num% )")) continue; const int offset = (tok->previous()->str() == ")") ? 2 : 1; if (tok->strAt(-2*offset) == "<") { if (isC() || !TemplateSimplifier::templateParameters(tok->tokAt(-2*offset))) continue; // '<' is less than; the condition is not a constant } // Find the token ":" then go to the next token Token *colon = skipTernaryOp(tok); if (!colon || colon->previous()->str() != ":" || !colon->next()) continue; //handle the GNU extension: "x ? : y" <-> "x ? x : y" if (colon->previous() == tok->next()) tok->insertToken(tok->strAt(-offset)); // go back before the condition, if possible tok = tok->tokAt(-2); if (offset == 2) { // go further back before the "(" tok = tok->tokAt(-2); //simplify the parentheses tok->deleteNext(); tok->next()->deleteNext(); } if (Token::Match(tok->next(), "false|0")) { // Use code after colon, remove code before it. Token::eraseTokens(tok, colon); tok = tok->next(); ret = true; } // The condition is true. Delete the operator after the ":".. else { // delete the condition token and the "?" tok->deleteNext(2); int ternaryOplevel = 0; for (const Token *endTok = colon; endTok; endTok = endTok->next()) { if (Token::Match(endTok, "(|[|{")) endTok = endTok->link(); else if (endTok->str() == "<" && (endTok->strAt(1) == ">" || TemplateSimplifier::templateParameters(endTok))) endTok = endTok->findClosingBracket(); else if (endTok->str() == "?") ++ternaryOplevel; else if (Token::Match(endTok, ")|}|]|;|,|:|>")) { if (endTok->str() == ":" && ternaryOplevel) --ternaryOplevel; else if (endTok->str() == ">" && !templateParameterEnd) ; else { Token::eraseTokens(colon->tokAt(-2), endTok); ret = true; break; } } } } } return ret; } void Tokenizer::simplifyUndefinedSizeArray() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%type%")) { Token *tok2 = tok->next(); while (tok2 && tok2->str() == "*") tok2 = tok2->next(); if (!Token::Match(tok2, "%name% [ ] ;|[")) continue; tok = tok2->previous(); Token *end = tok2->next(); int count = 0; do { end = end->tokAt(2); ++count; } while (Token::Match(end, "[ ] [;=[]")); if (Token::Match(end, "[;=]")) { do { tok2->deleteNext(2); tok->insertToken("*"); } while (--count); tok = end; } else tok = tok->tokAt(3); } } } void Tokenizer::simplifyCasts() { for (Token *tok = list.front(); tok; tok = tok->next()) { // Don't remove cast in such cases: // *((char *)a + 1) = 0; // Remove cast when casting a function pointer: // (*(void (*)(char *))fp)(x); if (!tok->isName() && Token::simpleMatch(tok->next(), "* (") && !Token::Match(tok->linkAt(2), ") %name%|&")) { tok = tok->linkAt(2); continue; } // #3935 : don't remove cast in such cases: // ((char *)a)[1] = 0; if (tok->str() == "(" && Token::simpleMatch(tok->link(), ") [")) { tok = tok->link(); continue; } // #4164 : ((unsigned char)1) => (1) if (Token::Match(tok->next(), "( %type% ) %num%") && tok->next()->link()->previous()->isStandardType()) { const MathLib::bigint value = MathLib::toLongNumber(tok->next()->link()->next()->str()); int bits = mSettings->char_bit * mTypeSize[tok->next()->link()->previous()->str()]; if (!tok->tokAt(2)->isUnsigned() && bits > 0) bits--; if (bits < 31 && value >= 0 && value < (1LL << bits)) { tok->linkAt(1)->next()->isCast(true); Token::eraseTokens(tok, tok->next()->link()->next()); } continue; } while ((Token::Match(tok->next(), "( %type% *| *| *|&| ) *|&| %name%") && (tok->str() != ")" || tok->tokAt(2)->isStandardType())) || Token::Match(tok->next(), "( const| %type% * *| *|&| ) *|&| %name%") || Token::Match(tok->next(), "( const| %type% %type% *| *| *|&| ) *|&| %name%") || (!tok->isName() && (Token::Match(tok->next(), "( %type% * *| *|&| ) (") || Token::Match(tok->next(), "( const| %type% %type% * *| *|&| ) (")))) { if (tok->isName() && tok->str() != "return") break; if (isCPP() && tok->strAt(-1) == "operator") break; // Remove cast.. Token::eraseTokens(tok, tok->next()->link()->next()); // Set isCasted flag. Token *tok2 = tok->next(); if (!Token::Match(tok2, "%name% [|.")) tok2->isCast(true); else { // TODO: handle more complex expressions tok2->next()->isCast(true); } // Remove '* &' if (Token::simpleMatch(tok, "* &")) { tok->deleteNext(); tok->deleteThis(); } if (tok->str() == ")" && tok->link()->previous()) { // If there was another cast before this, go back // there to check it also. e.g. "(int)(char)x" tok = tok->link()->previous(); } } // Replace pointer casts of 0.. "(char *)0" => "0" while (Token::Match(tok->next(), "( %type% %type%| * *| ) 0")) { tok->linkAt(1)->next()->isCast(true); Token::eraseTokens(tok, tok->next()->link()->next()); if (tok->str() == ")" && tok->link()->previous()) { // If there was another cast before this, go back // there to check it also. e.g. "(char*)(char*)0" tok = tok->link()->previous(); } } if (Token::Match(tok->next(), "dynamic_cast|reinterpret_cast|const_cast|static_cast <")) { Token *tok2 = tok->linkAt(2); if (!Token::simpleMatch(tok2, "> (")) break; tok2->tokAt(2)->isCast(true); Token::eraseTokens(tok, tok2->next()); } } } void Tokenizer::simplifyFunctionParameters() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->link() && Token::Match(tok, "{|[|(")) { tok = tok->link(); } // Find the function e.g. foo( x ) or foo( x, y ) else if (Token::Match(tok, "%name% ( %name% [,)]") && !(tok->strAt(-1) == ":" || tok->strAt(-1) == "," || tok->strAt(-1) == "::")) { // We have found old style function, now we need to change it // First step: Get list of argument names in parentheses std::map argumentNames; bool bailOut = false; Token * tokparam = nullptr; //take count of the function name.. const std::string& funcName(tok->str()); //floating token used to check for parameters Token *tok1 = tok; while (nullptr != (tok1 = tok1->tokAt(2))) { if (!Token::Match(tok1, "%name% [,)]")) { bailOut = true; break; } //same parameters: take note of the parameter if (argumentNames.find(tok1->str()) != argumentNames.end()) tokparam = tok1; else if (tok1->str() != funcName) argumentNames[tok1->str()] = tok1; else { if (tok1->next()->str() == ")") { if (tok1->previous()->str() == ",") { tok1 = tok1->tokAt(-2); tok1->deleteNext(2); } else { tok1 = tok1->previous(); tok1->deleteNext(); bailOut = true; break; } } else { tok1 = tok1->tokAt(-2); tok1->next()->deleteNext(2); } } if (tok1->next()->str() == ")") { tok1 = tok1->tokAt(2); //expect at least a type name after round brace.. if (!tok1 || !tok1->isName()) bailOut = true; break; } } //goto '(' tok = tok->next(); if (bailOut) { tok = tok->link(); continue; } tok1 = tok->link()->next(); // there should be the sequence '; {' after the round parentheses for (const Token* tok2 = tok1; tok2; tok2 = tok2->next()) { if (Token::simpleMatch(tok2, "; {")) break; else if (tok2->str() == "{") { bailOut = true; break; } } if (bailOut) { tok = tok->link(); continue; } // Last step: check out if the declarations between ')' and '{' match the parameters list std::map argumentNames2; while (tok1 && tok1->str() != "{") { if (Token::Match(tok1, "(|)")) { bailOut = true; break; } if (tok1->str() == ";") { if (tokparam) { syntaxError(tokparam); } Token *tok2 = tok1->previous(); while (tok2->str() == "]") tok2 = tok2->link()->previous(); //it should be a name.. if (!tok2->isName()) { bailOut = true; break; } if (argumentNames2.find(tok2->str()) != argumentNames2.end()) { //same parameter names... syntaxError(tok1); } else argumentNames2[tok2->str()] = tok2; if (argumentNames.find(tok2->str()) == argumentNames.end()) { //non-matching parameter... bailout bailOut = true; break; } } tok1 = tok1->next(); } if (bailOut || !tok1) { tok = tok->link(); continue; } //the two containers may not hold the same size... //in that case, the missing parameters are defined as 'int' if (argumentNames.size() != argumentNames2.size()) { //move back 'tok1' to the last ';' tok1 = tok1->previous(); for (std::pair& argumentName : argumentNames) { if (argumentNames2.find(argumentName.first) == argumentNames2.end()) { //add the missing parameter argument declaration tok1->insertToken(";"); tok1->insertToken(argumentName.first); //register the change inside argumentNames2 argumentNames2[argumentName.first] = tok1->next(); tok1->insertToken("int"); } } } while (tok->str() != ")") { //initialize start and end tokens to be moved Token *declStart = argumentNames2[tok->next()->str()]; Token *declEnd = declStart; while (declStart->previous()->str() != ";" && declStart->previous()->str() != ")") declStart = declStart->previous(); while (declEnd->next()->str() != ";" && declEnd->next()->str() != "{") declEnd = declEnd->next(); //remove ';' after declaration declEnd->deleteNext(); //replace the parameter name in the parentheses with all the declaration Token::replace(tok->next(), declStart, declEnd); //since there are changes to tokens, put tok where tok1 is tok = declEnd->next(); //fix up line number if (tok->str() == ",") tok->linenr(tok->previous()->linenr()); } //goto forward and continue tok = tok->next()->link(); } } } void Tokenizer::simplifyPointerToStandardType() { if (!isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "& %name% [ 0 ] !![")) continue; if (!Token::Match(tok->previous(), "[,(=]")) continue; // Remove '[ 0 ]' suffix Token::eraseTokens(tok->next(), tok->tokAt(5)); // Remove '&' prefix tok = tok->previous(); if (!tok) break; tok->deleteNext(); } } void Tokenizer::simplifyFunctionPointers() { for (Token *tok = list.front(); tok; tok = tok->next()) { // #2873 - do not simplify function pointer usage here: // (void)(xy(*p)(0)); if (Token::simpleMatch(tok, ") (")) { tok = tok->next()->link(); continue; } // check for function pointer cast if (Token::Match(tok, "( %type% %type%| *| *| ( * ) (") || Token::Match(tok, "static_cast < %type% %type%| *| *| ( * ) (")) { Token *tok1 = tok; if (isCPP() && tok1->str() == "static_cast") tok1 = tok1->next(); tok1 = tok1->next(); if (Token::Match(tok1->next(), "%type%")) tok1 = tok1->next(); while (tok1->next()->str() == "*") tok1 = tok1->next(); // check that the cast ends if (!Token::Match(tok1->linkAt(4), ") )|>")) continue; // ok simplify this function pointer cast to an ordinary pointer cast tok1->deleteNext(); tok1->next()->deleteNext(); Token::eraseTokens(tok1->next(), tok1->linkAt(2)->next()); continue; } // check for start of statement else if (tok->previous() && !Token::Match(tok->previous(), "{|}|;|,|(|public:|protected:|private:")) continue; if (Token::Match(tok, "delete|else|return|throw|typedef")) continue; while (Token::Match(tok, "%type%|:: %type%|::")) tok = tok->next(); Token *tok2 = (tok && tok->isName()) ? tok->next() : nullptr; while (Token::Match(tok2, "*|&")) tok2 = tok2->next(); if (!tok2 || tok2->str() != "(") continue; while (Token::Match(tok2, "(|:: %type%")) tok2 = tok2->tokAt(2); if (!Token::Match(tok2, "(|:: * *| %name%")) continue; tok2 = tok2->tokAt(2); if (tok2->str() == "*") tok2 = tok2->next(); while (Token::Match(tok2, "%type%|:: %type%|::")) tok2 = tok2->next(); if (!Token::Match(tok2, "%name% ) (") && !Token::Match(tok2, "%name% [ ] ) (") && !(Token::Match(tok2, "%name% (") && Token::simpleMatch(tok2->linkAt(1), ") ) ("))) continue; while (tok && tok->str() != "(") tok = tok->next(); // check that the declaration ends if (!tok || !tok->link() || !tok->link()->next()) { syntaxError(nullptr); } Token *endTok = tok->link()->next()->link(); if (Token::simpleMatch(endTok, ") throw (")) endTok = endTok->linkAt(2); if (!Token::Match(endTok, ") const|volatile| const|volatile| ;|,|)|=|[|{")) continue; while (Token::Match(endTok->next(), "const|volatile")) endTok->deleteNext(); // ok simplify this function pointer to an ordinary pointer Token::eraseTokens(tok->link(), endTok->next()); if (Token::simpleMatch(tok->link()->previous(), ") )")) { // Function returning function pointer // void (*dostuff(void))(void) {} tok->link()->deleteThis(); tok->deleteThis(); } else { // Function pointer variable // void (*p)(void) {} tok->link()->insertToken("("); Token *par1 = tok->link()->next(); par1->insertToken(")"); par1->link(par1->next()); par1->next()->link(par1); while (Token::Match(tok, "( %type% ::")) tok->deleteNext(2); } } } bool Tokenizer::simplifyFunctionReturn() { std::map functions; for (const Token *tok = tokens(); tok; tok = tok->next()) { if (tok->str() == "{") tok = tok->link(); else if (Token::Match(tok, "%name% ( ) { return %bool%|%char%|%num%|%str% ; }") && tok->strAt(-1) != "::") { const Token* const any = tok->tokAt(5); functions[tok->str()] = any; tok = any; } } if (functions.empty()) return false; bool ret = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "(|[|=|return|%op% %name% ( ) ;|]|)|%cop%")) { tok = tok->next(); auto it = functions.find(tok->str()); if (it != functions.cend()) { tok->str(it->second->str()); tok->deleteNext(2); ret = true; } } } return ret; } void Tokenizer::simplifyVarDecl(const bool only_k_r_fpar) { simplifyVarDecl(list.front(), nullptr, only_k_r_fpar); } void Tokenizer::simplifyVarDecl(Token * tokBegin, const Token * const tokEnd, const bool only_k_r_fpar) { const bool isCPP11 = mSettings->standards.cpp >= Standards::CPP11; // Split up variable declarations.. // "int a=4;" => "int a; a=4;" bool finishedwithkr = true; bool scopeDecl = false; for (Token *tok = tokBegin; tok != tokEnd; tok = tok->next()) { if (Token::Match(tok, "{|;")) scopeDecl = false; if (isCPP()) { if (Token::Match(tok, "class|struct|namespace|union")) scopeDecl = true; if (Token::Match(tok, "decltype|noexcept (")) { tok = tok->next()->link(); // skip decltype(...){...} if (tok && Token::simpleMatch(tok->previous(), ") {")) tok = tok->link(); } else if (Token::simpleMatch(tok, "= {") || (!scopeDecl && Token::Match(tok, "%name%|> {") && !Token::Match(tok, "else|try|do|const|constexpr|override|volatile|noexcept"))) { if (!tok->next()->link()) syntaxError(tokBegin); // Check for lambdas before skipping for (Token* tok2 = tok->next(); tok2 != tok->next()->link(); tok2 = tok2->next()) { Token* lambdaEnd = findLambdaEndScope(tok2); if (!lambdaEnd) continue; simplifyVarDecl(lambdaEnd->link()->next(), lambdaEnd, only_k_r_fpar); } tok = tok->next()->link(); } } else if (Token::simpleMatch(tok, "= {")) { tok = tok->next()->link(); } if (!tok) { syntaxError(tokBegin); } if (only_k_r_fpar && finishedwithkr) { if (Token::Match(tok, "(|[|{")) { tok = tok->link(); if (tok->next() && Token::Match(tok, ") !!{")) tok = tok->next(); else continue; } else continue; } else if (tok->str() == "(") { if (isCPP()) { for (Token * tok2 = tok; tok2 && tok2 != tok->link(); tok2 = tok2->next()) { if (Token::Match(tok2, "[(,] [")) { // lambda function at tok2->next() // find start of lambda body Token * lambdaBody = tok2; while (lambdaBody && lambdaBody != tok2->link() && lambdaBody->str() != "{") lambdaBody = lambdaBody->next(); if (lambdaBody && lambdaBody != tok2->link() && lambdaBody->link()) simplifyVarDecl(lambdaBody, lambdaBody->link()->next(), only_k_r_fpar); } } } tok = tok->link(); } if (!tok) syntaxError(nullptr); // #7043 invalid code if (tok->previous() && !Token::Match(tok->previous(), "{|}|;|)|public:|protected:|private:")) continue; if (Token::simpleMatch(tok, "template <")) continue; Token *type0 = tok; if (!Token::Match(type0, "::|extern| %type%")) continue; if (Token::Match(type0, "else|return|public:|protected:|private:")) continue; if (isCPP11 && type0->str() == "using") continue; if (isCPP() && type0->str() == "namespace") continue; bool isconst = false; bool isstatic = false; Token *tok2 = type0; int typelen = 1; if (Token::Match(tok2, "::|extern")) { tok2 = tok2->next(); typelen++; } //check if variable is declared 'const' or 'static' or both while (tok2) { if (!Token::Match(tok2, "const|static|constexpr") && Token::Match(tok2, "%type% const|static")) { tok2 = tok2->next(); ++typelen; } if (Token::Match(tok2, "const|constexpr")) isconst = true; else if (Token::Match(tok2, "static|constexpr")) isstatic = true; else if (Token::Match(tok2, "%type% :: %type%")) { tok2 = tok2->next(); ++typelen; } else break; if (tok2->strAt(1) == "*") break; if (Token::Match(tok2->next(), "& %name% ,")) break; tok2 = tok2->next(); ++typelen; } // strange looking variable declaration => don't split up. if (Token::Match(tok2, "%type% *|&| %name% , %type% *|&| %name%")) continue; if (Token::Match(tok2, "struct|union|class %type%")) { tok2 = tok2->next(); ++typelen; } // check for qualification.. if (Token::Match(tok2, ":: %type%")) { ++typelen; tok2 = tok2->next(); } //skip combinations of templates and namespaces while (!isC() && (Token::Match(tok2, "%type% <") || Token::Match(tok2, "%type% ::"))) { if (tok2->next()->str() == "<" && !TemplateSimplifier::templateParameters(tok2->next())) { tok2 = nullptr; break; } typelen += 2; tok2 = tok2->tokAt(2); if (tok2 && tok2->previous()->str() == "::") continue; int indentlevel = 0; int parens = 0; for (Token *tok3 = tok2; tok3; tok3 = tok3->next()) { ++typelen; if (!parens && tok3->str() == "<") { ++indentlevel; } else if (!parens && tok3->str() == ">") { if (indentlevel == 0) { tok2 = tok3->next(); break; } --indentlevel; } else if (!parens && tok3->str() == ">>") { if (indentlevel <= 1) { tok2 = tok3->next(); break; } indentlevel -= 2; } else if (tok3->str() == "(") { ++parens; } else if (tok3->str() == ")") { if (!parens) { tok2 = nullptr; break; } --parens; } else if (tok3->str() == ";") { break; } } if (Token::Match(tok2, ":: %type%")) { ++typelen; tok2 = tok2->next(); } } //pattern: "%type% *| ... *| const| %name% ,|=" if (Token::Match(tok2, "%type%") || (tok2 && tok2->previous() && tok2->previous()->str() == ">")) { Token *varName = tok2; if (!tok2->previous() || tok2->previous()->str() != ">") varName = varName->next(); else --typelen; //skip all the pointer part bool isPointerOrRef = false; while (Token::simpleMatch(varName, "*") || Token::Match(varName, "& %name% ,")) { isPointerOrRef = true; varName = varName->next(); } while (Token::Match(varName, "%type% %type%")) { if (varName->str() != "const") { ++typelen; } varName = varName->next(); } // Function pointer if (Token::simpleMatch(varName, "( *") && Token::Match(varName->link()->previous(), "%name% ) ( ) =")) { Token *endDecl = varName->link()->tokAt(2); varName = varName->link()->previous(); endDecl->insertToken(";"); endDecl = endDecl->next(); endDecl->insertToken(varName->str()); continue; } //non-VLA case else if (Token::Match(varName, "%name% ,|=")) { if (varName->str() != "operator") { tok2 = varName->next(); // The ',' or '=' token if (tok2->str() == "=" && (isstatic || (isconst && !isPointerOrRef))) { //do not split const non-pointer variables.. while (tok2 && tok2->str() != "," && tok2->str() != ";") { if (Token::Match(tok2, "{|(|[")) tok2 = tok2->link(); const Token *tok3 = tok2; if (!isC() && tok2->str() == "<" && TemplateSimplifier::templateParameters(tok2) > 0) { tok2 = tok2->findClosingBracket(); } if (!tok2) syntaxError(tok3); // #6881 invalid code tok2 = tok2->next(); } if (tok2 && tok2->str() == ";") tok2 = nullptr; } } else tok2 = nullptr; } //VLA case else if (Token::Match(varName, "%name% [")) { tok2 = varName->next(); while (Token::Match(tok2->link(), "] ,|=|[")) tok2 = tok2->link()->next(); if (!Token::Match(tok2, "=|,")) tok2 = nullptr; if (tok2 && tok2->str() == "=") { while (tok2 && tok2->str() != "," && tok2->str() != ";") { if (Token::Match(tok2, "{|(|[")) tok2 = tok2->link(); tok2 = tok2->next(); } if (tok2 && tok2->str() == ";") tok2 = nullptr; } } // brace initialization else if (Token::Match(varName, "%name% {")) { tok2 = varName->next(); tok2 = tok2->link(); if (tok2) tok2 = tok2->next(); if (tok2 && tok2->str() != ",") tok2 = nullptr; } // parenthesis, functions can't be declared like: // int f1(a,b), f2(c,d); // so if there is a comma assume this is a variable declaration else if (Token::Match(varName, "%name% (") && Token::simpleMatch(varName->linkAt(1), ") ,")) { tok2 = varName->linkAt(1)->next(); } else tok2 = nullptr; } else { tok2 = nullptr; } if (!tok2) { if (only_k_r_fpar) finishedwithkr = false; continue; } if (tok2->str() == ",") { tok2->str(";"); tok2->isSplittedVarDeclComma(true); //TODO: should we have to add also template '<>' links? TokenList::insertTokens(tok2, type0, typelen); } else { Token *eq = tok2; while (tok2) { if (Token::Match(tok2, "{|(|[")) tok2 = tok2->link(); else if (!isC() && tok2->str() == "<" && tok2->previous()->isName() && !tok2->previous()->varId()) tok2 = tok2->findClosingBracket(); else if (std::strchr(";,", tok2->str()[0])) { // "type var =" => "type var; var =" const Token *varTok = type0->tokAt(typelen); while (Token::Match(varTok, "%name%|*|& %name%|*|&")) varTok = varTok->next(); if (!varTok) syntaxError(tok2); // invalid code TokenList::insertTokens(eq, varTok, 2); eq->str(";"); eq->isSplittedVarDeclEq(true); // "= x, " => "= x; type " if (tok2->str() == ",") { tok2->str(";"); tok2->isSplittedVarDeclComma(true); TokenList::insertTokens(tok2, type0, typelen); } break; } if (tok2) tok2 = tok2->next(); } } finishedwithkr = (only_k_r_fpar && tok2 && tok2->strAt(1) == "{"); } } void Tokenizer::simplifyStaticConst() { // This function will simplify the token list so that the qualifiers "extern", "static" // and "const" appear in the same order as in the array below. const std::string qualifiers[] = {"extern", "static", "const"}; // Move 'const' before all other qualifiers and types and then // move 'static' before all other qualifiers and types, ... for (Token *tok = list.front(); tok; tok = tok->next()) { bool continue2 = false; for (int i = 0; i < sizeof(qualifiers)/sizeof(qualifiers[0]); i++) { // Keep searching for a qualifier if (!tok->next() || tok->next()->str() != qualifiers[i]) continue; // Look backwards to find the beginning of the declaration Token* leftTok = tok; bool behindOther = false; for (; leftTok; leftTok = leftTok->previous()) { for (int j = 0; j <= i; j++) { if (leftTok->str() == qualifiers[j]) { behindOther = true; break; } } if (behindOther) break; if (!Token::Match(leftTok, "%type%|struct|::") || (isCPP() && Token::Match(leftTok, "private:|protected:|public:|operator|template"))) { break; } } // The token preceding the declaration should indicate the start of a declaration if (leftTok == tok) continue; if (leftTok && !behindOther && !Token::Match(leftTok, ";|{|}|(|,|private:|protected:|public:")) { continue2 = true; break; } // Move the qualifier to the left-most position in the declaration tok->deleteNext(); if (!leftTok) { list.front()->insertToken(qualifiers[i], emptyString, false); list.front()->swapWithNext(); tok = list.front(); } else if (leftTok->next()) { leftTok->next()->insertToken(qualifiers[i], emptyString, true); tok = leftTok->next(); } else { leftTok->insertToken(qualifiers[i]); tok = leftTok; } } if (continue2) continue; } } void Tokenizer::simplifyIfAndWhileAssign() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok->next(), "if|while (")) continue; const Token* tokAt3 = tok->tokAt(3); if (!Token::Match(tokAt3, "!| (| %name% =") && !Token::Match(tokAt3, "!| (| %name% . %name% =") && !Token::Match(tokAt3, "0 == (| %name% =") && !Token::Match(tokAt3, "0 == (| %name% . %name% =")) continue; // simplifying a "while(cond) { }" condition ? const bool iswhile(tok->next()->str() == "while"); // simplifying a "do { } while(cond);" condition ? const bool isDoWhile = iswhile && Token::simpleMatch(tok, "}") && Token::simpleMatch(tok->link()->previous(), "do"); Token* openBraceTok = tok->link(); // delete the "if|while" tok->deleteNext(); // Remember if there is a "!" or not. And delete it if there are. const bool isNot(Token::Match(tok->tokAt(2), "!|0")); if (isNot) tok->next()->deleteNext((tok->strAt(2) == "0") ? 2 : 1); // Delete parentheses.. and remember how many there are with // their links. std::stack braces; while (tok->next()->str() == "(") { braces.push(tok->next()->link()); tok->deleteNext(); } // Skip the "%name% = ..." Token *tok2; for (tok2 = tok->next(); tok2; tok2 = tok2->next()) { if (tok2->str() == "(") tok2 = tok2->link(); else if (tok2->str() == ")") break; } // Insert "; if|while ( .." tok2 = tok2->previous(); if (tok->strAt(2) == ".") { tok2->insertToken(tok->strAt(3)); tok2->next()->varId(tok->tokAt(3)->varId()); tok2->insertToken("."); } tok2->insertToken(tok->next()->str()); tok2->next()->varId(tok->next()->varId()); while (!braces.empty()) { tok2->insertToken("("); Token::createMutualLinks(tok2->next(), braces.top()); braces.pop(); } if (isNot) tok2->next()->insertToken("!"); tok2->insertToken(iswhile ? "while" : "if"); if (isDoWhile) { tok2->insertToken("}"); Token::createMutualLinks(openBraceTok, tok2->next()); } tok2->insertToken(";"); // delete the extra "}" if (isDoWhile) tok->deleteThis(); // If it's a while loop, insert the assignment in the loop if (iswhile && !isDoWhile) { int indentlevel = 0; Token *tok3 = tok2; for (; tok3; tok3 = tok3->next()) { if (tok3->str() == "{") ++indentlevel; else if (tok3->str() == "}") { if (indentlevel <= 1) break; --indentlevel; } } if (tok3 && indentlevel == 1) { tok3 = tok3->previous(); std::stack braces2; for (tok2 = tok2->next(); tok2 && tok2 != tok; tok2 = tok2->previous()) { tok3->insertToken(tok2->str()); Token *newTok = tok3->next(); newTok->varId(tok2->varId()); newTok->fileIndex(tok2->fileIndex()); newTok->linenr(tok2->linenr()); // link() new tokens manually if (tok2->link()) { if (Token::Match(newTok, "}|)|]|>")) { braces2.push(newTok); } else { Token::createMutualLinks(newTok, braces2.top()); braces2.pop(); } } } } } } } void Tokenizer::simplifyVariableMultipleAssign() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%name% = %name% = %num%|%name% ;")) { // skip intermediate assignments Token *tok2 = tok->previous(); while (tok2 && tok2->str() == "=" && Token::Match(tok2->previous(), "%name%")) { tok2 = tok2->tokAt(-2); } if (!tok2 || tok2->str() != ";") { continue; } Token *stopAt = tok->tokAt(2); const Token *valueTok = stopAt->tokAt(2); const std::string& value(valueTok->str()); tok2 = tok2->next(); while (tok2 != stopAt) { tok2->next()->insertToken(";"); tok2->next()->insertToken(value); tok2 = tok2->tokAt(4); } } } } // Binary operators simplification map static const std::unordered_map cAlternativeTokens = { std::make_pair("and", "&&") , std::make_pair("and_eq", "&=") , std::make_pair("bitand", "&") , std::make_pair("bitor", "|") , std::make_pair("not_eq", "!=") , std::make_pair("or", "||") , std::make_pair("or_eq", "|=") , std::make_pair("xor", "^") , std::make_pair("xor_eq", "^=") }; // Simplify the C alternative tokens: // and => && // and_eq => &= // bitand => & // bitor => | // compl => ~ // not => ! // not_eq => != // or => || // or_eq => |= // xor => ^ // xor_eq => ^= bool Tokenizer::simplifyCAlternativeTokens() { /* executable scope level */ int executableScopeLevel = 0; std::vector alt; bool replaceAll = false; // replace all or none for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == ")") { if (const Token *end = isFunctionHead(tok, "{")) { ++executableScopeLevel; tok = const_cast(end); continue; } } if (tok->str() == "{") { if (executableScopeLevel > 0) ++executableScopeLevel; continue; } if (tok->str() == "}") { if (executableScopeLevel > 0) --executableScopeLevel; continue; } if (!tok->isName()) continue; const std::unordered_map::const_iterator cOpIt = cAlternativeTokens.find(tok->str()); if (cOpIt != cAlternativeTokens.end()) { alt.push_back(tok); // Is this a variable declaration.. if (isC() && Token::Match(tok->previous(), "%type%|* %name% [;,=]")) return false; if (!Token::Match(tok->previous(), "%name%|%num%|%char%|)|]|> %name% %name%|%num%|%char%|%op%|(")) continue; if (Token::Match(tok->next(), "%assign%|%or%|%oror%|&&|*|/|%|^") && !Token::Match(tok->previous(), "%num%|%char%|) %name% *")) continue; if (executableScopeLevel == 0 && Token::Match(tok, "%name% (")) { const Token *start = tok; while (Token::Match(start, "%name%|*")) start = start->previous(); if (!start || Token::Match(start, "[;}]")) continue; } replaceAll = true; } else if (Token::Match(tok, "not|compl")) { alt.push_back(tok); if (Token::Match(tok->previous(), "%assign%") || Token::Match(tok->next(), "%num%")) { replaceAll = true; continue; } // Don't simplify 'not p;' (in case 'not' is a type) if (!Token::Match(tok->next(), "%name%|(") || Token::Match(tok->previous(), "[;{}]") || (executableScopeLevel == 0U && tok->strAt(-1) == "(")) continue; replaceAll = true; } } if (!replaceAll) return false; for (Token *tok: alt) { const std::unordered_map::const_iterator cOpIt = cAlternativeTokens.find(tok->str()); if (cOpIt != cAlternativeTokens.end()) tok->str(cOpIt->second); else if (tok->str() == "not") tok->str("!"); else tok->str("~"); } return !alt.empty(); } // int i(0); => int i; i = 0; // int i(0), j; => int i; i = 0; int j; void Tokenizer::simplifyInitVar() { if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName() || (tok->previous() && !Token::Match(tok->previous(), "[;{}]"))) continue; if (tok->str() == "return") continue; if (Token::Match(tok, "class|struct|union| %type% *| %name% ( &| %any% ) ;")) { tok = initVar(tok); } else if (Token::Match(tok, "%type% *| %name% ( %type% (")) { const Token* tok2 = tok->tokAt(2); if (!tok2->link()) tok2 = tok2->next(); if (!tok2->link() || (tok2->link()->strAt(1) == ";" && !Token::simpleMatch(tok2->linkAt(2), ") ("))) tok = initVar(tok); } else if (Token::Match(tok, "class|struct|union| %type% *| %name% ( &| %any% ) ,")) { Token *tok1 = tok->tokAt(5); while (tok1->str() != ",") tok1 = tok1->next(); tok1->str(";"); const int numTokens = (Token::Match(tok, "class|struct|union")) ? 2U : 1U; TokenList::insertTokens(tok1, tok, numTokens); tok = initVar(tok); } } } Token * Tokenizer::initVar(Token * tok) { // call constructor of class => no simplification if (Token::Match(tok, "class|struct|union")) { if (tok->strAt(2) != "*") return tok; tok = tok->next(); } else if (!tok->isStandardType() && tok->str() != "auto" && tok->next()->str() != "*") return tok; // goto variable name.. tok = tok->next(); if (tok->str() == "*") tok = tok->next(); // sizeof is not a variable name.. if (tok->str() == "sizeof") return tok; // check initializer.. if (tok->tokAt(2)->isStandardType() || tok->strAt(2) == "void") return tok; else if (!tok->tokAt(2)->isNumber() && !Token::Match(tok->tokAt(2), "%type% (") && tok->strAt(2) != "&" && tok->tokAt(2)->varId() == 0) return tok; // insert '; var =' tok->insertToken(";"); tok->next()->insertToken(tok->str()); tok->tokAt(2)->varId(tok->varId()); tok = tok->tokAt(2); tok->insertToken("="); // goto '('.. tok = tok->tokAt(2); // delete ')' tok->link()->deleteThis(); // delete this tok->deleteThis(); return tok; } bool Tokenizer::simplifyKnownVariables() { // return value for function. Set to true if any simplifications are made bool ret = false; // constants.. { std::unordered_map constantValues; std::map constantVars; std::unordered_map> constantValueUsages; for (Token *tok = list.front(); tok; tok = tok->next()) { // Reference to variable if (Token::Match(tok, "%type%|* & %name% = %name% ;")) { Token *start = tok->previous(); while (Token::Match(start,"%type%|*|&")) start = start->previous(); if (!Token::Match(start,"[;{}]")) continue; const Token *reftok = tok->tokAt(2); const Token *vartok = reftok->tokAt(2); int level = 0; for (Token *tok2 = tok->tokAt(6); tok2; tok2 = tok2->next()) { if (tok2->str() == "{") { ++level; } else if (tok2->str() == "}") { if (level <= 0) break; --level; } else if (tok2->varId() == reftok->varId()) { tok2->str(vartok->str()); tok2->varId(vartok->varId()); } } Token::eraseTokens(start, tok->tokAt(6)); tok = start; } if (tok->isName() && (Token::Match(tok, "static| const| static| %type% const| %name% = %any% ;") || Token::Match(tok, "static| const| static| %type% const| %name% ( %any% ) ;"))) { bool isconst = false; for (const Token *tok2 = tok; (tok2->str() != "=") && (tok2->str() != "("); tok2 = tok2->next()) { if (tok2->str() == "const") { isconst = true; break; } } if (!isconst) continue; Token *tok1 = tok; // start of statement if (tok != list.front() && !Token::Match(tok->previous(),";|{|}|private:|protected:|public:")) continue; // skip "const" and "static" while (Token::Match(tok, "const|static")) tok = tok->next(); // pod type if (!tok->isStandardType()) continue; Token * const vartok = (tok->next() && tok->next()->str() == "const") ? tok->tokAt(2) : tok->next(); const Token * const valuetok = vartok->tokAt(2); if (Token::Match(valuetok, "%bool%|%char%|%num%|%str% )| ;")) { // record a constant value for this variable constantValues[vartok->varId()] = valuetok->str(); constantVars[vartok->varId()] = tok1; } } else if (tok->varId()) { // find the entry for the known variable, if any. Exclude the location where the variable is assigned with next == "=" if (constantValues.find(tok->varId()) != constantValues.end() && tok->next()->str() != "=") { constantValueUsages[tok->varId()].push_back(tok); } } } for (auto constantVar = constantVars.rbegin(); constantVar != constantVars.rend(); constantVar++) { bool referenceFound = false; std::list usageList = constantValueUsages[constantVar->first]; for (Token* usage : usageList) { // check if any usages of each known variable are a reference if (Token::Match(usage->tokAt(-2), "(|[|,|{|return|%op% & %varid%", constantVar->first)) { referenceFound = true; break; } } if (!referenceFound) { // replace all usages of non-referenced known variables with their value for (Token* usage : usageList) { usage->str(constantValues[constantVar->first]); } Token* startTok = constantVar->second; // remove variable assignment statement while (startTok->next()->str() != ";") startTok->deleteNext(); startTok->deleteNext(); // #8579 if we can we want another token to delete startTok. if we can't it doesn't matter if (startTok->previous()) { startTok->previous()->deleteNext(); } else if (startTok->next()) { startTok->next()->deletePrevious(); } else { startTok->deleteThis(); } startTok = nullptr; constantVar->second = nullptr; ret = true; } } } // variable id for local, float/double, array variables std::set localvars; std::set floatvars; std::set arrays; // auto variables.. for (Token *tok = list.front(); tok; tok = tok->next()) { // Search for a block of code Token * const start = const_cast(startOfExecutableScope(tok)); if (!start) continue; for (const Token *tok2 = start->previous(); tok2 && !Token::Match(tok2, "[;{}]"); tok2 = tok2->previous()) { if (tok2->varId() != 0) localvars.insert(tok2->varId()); } tok = start; // parse the block of code.. int indentlevel = 0; Token *tok2 = tok; for (; tok2; tok2 = tok2->next()) { if (Token::Match(tok2, "[;{}] %type% %name%|*")) { bool isfloat = false; bool ispointer = false; const Token *vartok = tok2->next(); while (Token::Match(vartok, "%name%|* %name%|*")) { if (Token::Match(vartok, "float|double")) isfloat = true; if (vartok->str() == "*") ispointer = true; vartok = vartok->next(); } if (Token::Match(vartok, "%var% ;|[")) localvars.insert(vartok->varId()); if (isfloat && !ispointer && Token::Match(vartok, "%var% ;")) floatvars.insert(vartok->varId()); if (Token::Match(vartok, "%var% [")) arrays.insert(vartok->varId()); } if (tok2->str() == "{") ++indentlevel; else if (tok2->str() == "}") { --indentlevel; if (indentlevel <= 0) break; } else if (Token::simpleMatch(tok2, "for (")) tok2 = tok2->next()->link(); else if (tok2->previous()->str() != "*" && !Token::Match(tok2->tokAt(-2), "* --|++") && (Token::Match(tok2, "%name% = %bool%|%char%|%num%|%str%|%name% ;") || Token::Match(tok2, "%name% [ %num%| ] = %str% ;") || Token::Match(tok2, "%name% = & %name% ;") || (Token::Match(tok2, "%name% = & %name% [ 0 ] ;") && arrays.find(tok2->tokAt(3)->varId()) != arrays.end()))) { const int varid = tok2->varId(); if (varid == 0) continue; if (Token::Match(tok2->previous(), "[;{}]") && localvars.find(varid) == localvars.end()) continue; // initialization of static variable => the value is not *known* { bool isstatic = false; const Token *decl = tok2->previous(); while (decl && (decl->isName() || decl->str() == "*")) { if (decl->str() == "static") { isstatic = true; break; } decl = decl->previous(); } if (isstatic) continue; } // skip loop variable if (Token::Match(tok2->tokAt(-2), "(|:: %type%")) { const Token *tok3 = tok2->previous(); do { tok3 = tok3->tokAt(-2); } while (Token::Match(tok3->previous(), ":: %type%")); if (Token::Match(tok3->tokAt(-2), "for ( %type%")) continue; } // struct name.. if (Token::Match(tok2, "%varid% = &| %varid%", tok2->varId())) continue; const std::string structname = Token::Match(tok2->tokAt(-3), "[;{}] %name% .") ? std::string(tok2->strAt(-2) + " .") : std::string(); const Token * const valueToken = tok2->tokAt(2); std::string value; nonneg int valueVarId = 0; Token *tok3 = nullptr; bool valueIsPointer = false; // there could be a hang here if tok2 is moved back by the function calls below for some reason if (Settings::terminated()) return false; if (!simplifyKnownVariablesGetData(varid, &tok2, &tok3, value, valueVarId, valueIsPointer, floatvars.find(tok2->varId()) != floatvars.end())) continue; if (valueVarId > 0 && arrays.find(valueVarId) != arrays.end()) continue; ret |= simplifyKnownVariablesSimplify(&tok2, tok3, varid, structname, value, valueVarId, valueIsPointer, valueToken, indentlevel); } else if (Token::Match(tok2, "strcpy|sprintf ( %name% , %str% ) ;")) { const int varid(tok2->tokAt(2)->varId()); if (varid == 0) continue; const Token * const valueToken = tok2->tokAt(4); std::string value(valueToken->str()); if (tok2->str() == "sprintf") { std::string::size_type n = 0; while ((n = value.find("%%", n)) != std::string::npos) { // Replace "%%" with "%" - erase the first '%' and continue past the second '%' value.erase(n, 1); ++n; } } const int valueVarId(0); const bool valueIsPointer(false); Token *tok3 = tok2->tokAt(6); ret |= simplifyKnownVariablesSimplify(&tok2, tok3, varid, emptyString, value, valueVarId, valueIsPointer, valueToken, indentlevel); // there could be a hang here if tok2 was moved back by the function call above for some reason if (Settings::terminated()) return false; } } if (tok2) tok = tok2->previous(); } return ret; } bool Tokenizer::simplifyKnownVariablesGetData(nonneg int varid, Token **_tok2, Token **_tok3, std::string &value, nonneg int &valueVarId, bool &valueIsPointer, bool floatvar) { Token *tok2 = *_tok2; Token *tok3 = nullptr; if (Token::simpleMatch(tok2->tokAt(-2), "for (")) { // only specific for loops is handled if (!Token::Match(tok2, "%varid% = %num% ; %varid% <|<= %num% ; ++| %varid% ++| ) {", varid)) return false; // is there a "break" in the for loop? bool hasbreak = false; const Token* end4 = tok2->linkAt(-1)->linkAt(1); for (const Token *tok4 = tok2->previous()->link(); tok4 != end4; tok4 = tok4->next()) { if (tok4->str() == "break") { hasbreak = true; break; } } if (hasbreak) return false; // no break => the value of the counter value is known after the for loop.. const Token* compareTok = tok2->tokAt(5); if (compareTok->str() == "<") { value = compareTok->next()->str(); valueVarId = compareTok->next()->varId(); } else value = MathLib::toString(MathLib::toLongNumber(compareTok->next()->str()) + 1); // Skip for-body.. tok3 = tok2->previous()->link()->next()->link()->next(); } else { value = tok2->strAt(2); valueVarId = tok2->tokAt(2)->varId(); if (tok2->strAt(1) == "[") { value = tok2->next()->link()->strAt(2); valueVarId = 0; } else if (value == "&") { value = tok2->strAt(3); valueVarId = tok2->tokAt(3)->varId(); // *ptr = &var; *ptr = 5; // equals // var = 5; not *var = 5; if (tok2->strAt(4) == ";") valueIsPointer = true; } // Add a '.0' to a decimal value and therefore convert it to an floating point number. else if (MathLib::isDec(tok2->strAt(2)) && floatvar) { value += ".0"; } // float variable: convert true/false to 1.0 / 0.0 else if (tok2->tokAt(2)->isBoolean() && floatvar) { value = (value == "true") ? "1.0" : "0.0"; } if (Token::simpleMatch(tok2->next(), "= &")) tok2 = tok2->tokAt(3); tok3 = tok2->next(); } *_tok2 = tok2; *_tok3 = tok3; return true; } bool Tokenizer::simplifyKnownVariablesSimplify(Token **tok2, Token *tok3, nonneg int varid, const std::string &structname, std::string &value, nonneg int valueVarId, bool valueIsPointer, const Token * const valueToken, int indentlevel) const { const bool pointeralias(valueToken->isName() || Token::Match(valueToken, "& %name% [")); const bool varIsGlobal = (indentlevel == 0); const bool printDebug = mSettings->debugwarnings; if (mErrorLogger && !list.getFiles().empty()) mErrorLogger->reportProgress(list.getFiles()[0], "Tokenize (simplifyKnownVariables)", tok3->progressValue()); if (isMaxTime()) return false; bool ret = false; Token* bailOutFromLoop = nullptr; int indentlevel3 = indentlevel; bool ret3 = false; for (; tok3; tok3 = tok3->next()) { if (tok3->str() == "{") { ++indentlevel3; } else if (tok3->str() == "}") { --indentlevel3; if (indentlevel3 < indentlevel) { if (Token::Match((*tok2)->tokAt(-7), "%type% * %name% ; %name% = & %name% ;") && (*tok2)->strAt(-5) == (*tok2)->strAt(-3)) { (*tok2) = (*tok2)->tokAt(-4); Token::eraseTokens((*tok2), (*tok2)->tokAt(6)); } break; } } // Stop if there is a pointer alias and a shadow variable is // declared in an inner scope (#3058) if (valueIsPointer && tok3->varId() > 0 && tok3->previous() && (tok3->previous()->isName() || tok3->previous()->str() == "*") && valueToken->str() == "&" && valueToken->next() && valueToken->next()->isName() && tok3->str() == valueToken->next()->str() && tok3->varId() > valueToken->next()->varId()) { // more checking if this is a variable declaration bool decl = true; for (const Token *tok4 = tok3->previous(); tok4; tok4 = tok4->previous()) { if (Token::Match(tok4, "[;{}]")) break; else if (tok4->isName()) { if (tok4->varId() > 0) { decl = false; break; } } else if (!Token::Match(tok4, "[&*]")) { decl = false; break; } } if (decl) break; } // Stop if label is found if (Token::Match(tok3, "; %type% : ;")) break; // Stop if break/continue is found .. if (Token::Match(tok3, "break|continue")) break; if ((indentlevel3 > 1 || !Token::simpleMatch(Token::findsimplematch(tok3,";"), "; }")) && tok3->str() == "return") ret3 = true; if (ret3 && tok3->str() == ";") break; if (pointeralias && Token::Match(tok3, ("!!= " + value).c_str())) break; // Stop if a loop is found if (pointeralias && Token::Match(tok3, "do|for|while")) break; // Stop if unknown function call is seen and the variable is global: it might be // changed by the function call if (varIsGlobal && tok3->str() == ")" && tok3->link() && Token::Match(tok3->link()->tokAt(-2), "[;{}] %name% (") && !Token::Match(tok3->link()->previous(), "if|for|while|switch|BOOST_FOREACH")) break; // Stop if something like 'while (--var)' is found if (Token::Match(tok3, "for|while|do")) { const Token *endpar = tok3->next()->link(); if (Token::simpleMatch(endpar, ") {")) endpar = endpar->next()->link(); bool bailout = false; for (const Token *tok4 = tok3; tok4 && tok4 != endpar; tok4 = tok4->next()) { if (Token::Match(tok4, "++|-- %varid%", varid) || Token::Match(tok4, "%varid% ++|--|=", varid)) { bailout = true; break; } } if (bailout) break; } if (bailOutFromLoop) { // This could be a loop, skip it, but only if it doesn't contain // the variable we are checking for. If it contains the variable // we will bail out. if (tok3->varId() == varid) { // Continue //tok2 = bailOutFromLoop; break; } else if (tok3 == bailOutFromLoop) { // We have skipped the loop bailOutFromLoop = nullptr; continue; } continue; } else if (tok3->str() == "{" && tok3->previous()->str() == ")") { // There is a possible loop after the assignment. Try to skip it. if (tok3->previous()->link() && tok3->previous()->link()->strAt(-1) != "if") bailOutFromLoop = tok3->link(); continue; } // Variable used in realloc (see Ticket #1649) if (Token::Match(tok3, "%name% = realloc ( %name% ,") && tok3->varId() == varid && tok3->tokAt(4)->varId() == varid) { tok3->tokAt(4)->str(value); ret = true; } // condition "(|&&|%OROR% %varid% )|&&|%OROR%|; if (!Token::Match(tok3->previous(), "( %name% )") && Token::Match(tok3->previous(), "&&|(|%oror% %varid% &&|%oror%|)|;", varid)) { tok3->str(value); tok3->varId(valueVarId); ret = true; } // parameter in function call.. if (tok3->varId() == varid && Token::Match(tok3->previous(), "[(,] %name% [,)]")) { // If the parameter is passed by value then simplify it if (isFunctionParameterPassedByValue(tok3)) { tok3->str(value); tok3->varId(valueVarId); ret = true; } } // Variable is used somehow in a non-defined pattern => bail out if (tok3->varId() == varid) { // This is a really generic bailout so let's try to avoid this. // There might be lots of false negatives. if (printDebug) { // FIXME: Fix all the debug warnings for values and then // remove this bailout if (pointeralias) break; // suppress debug-warning when calling member function if (Token::Match(tok3->next(), ". %name% (")) break; // suppress debug-warning when assignment if (tok3->strAt(1) == "=") break; // taking address of variable.. if (Token::Match(tok3->tokAt(-2), "return|= & %name% ;")) break; // parameter in function call.. if (Token::Match(tok3->tokAt(-2), "%name% ( %name% ,|)") || Token::Match(tok3->previous(), ", %name% ,|)")) break; // conditional increment if (Token::Match(tok3->tokAt(-3), ") { ++|--") || Token::Match(tok3->tokAt(-2), ") { %name% ++|--")) break; reportError(tok3, Severity::debug, "debug", "simplifyKnownVariables: bailing out (variable="+tok3->str()+", value="+value+")"); } break; } // Using the variable in condition.. if (Token::Match(tok3->previous(), ("if ( " + structname + " %varid% %cop%|)").c_str(), varid) || Token::Match(tok3, ("( " + structname + " %varid% %comp%").c_str(), varid) || Token::Match(tok3, ("%comp%|!|= " + structname + " %varid% %cop%|)|;").c_str(), varid) || Token::Match(tok3->previous(), "strlen|free ( %varid% )", varid)) { if (value[0] == '\"' && tok3->previous()->str() != "strlen") { // bail out if value is a string unless if it's just given // as parameter to strlen break; } if (!structname.empty()) { tok3->deleteNext(2); } if (Token::Match(valueToken, "& %name% ;")) { tok3->insertToken("&"); tok3 = tok3->next(); } tok3 = tok3->next(); tok3->str(value); tok3->varId(valueVarId); ret = true; } // pointer alias used in condition.. if (Token::Match(valueToken,"& %name% ;") && Token::Match(tok3, ("( * " + structname + " %varid% %cop%").c_str(), varid)) { tok3->deleteNext(); if (!structname.empty()) tok3->deleteNext(2); tok3 = tok3->next(); tok3->str(value); tok3->varId(valueVarId); ret = true; } // Delete pointer alias if (isCPP() && pointeralias && (tok3->str() == "delete") && tok3->next() && (Token::Match(tok3->next(), "%varid% ;", varid) || Token::Match(tok3->next(), "[ ] %varid%", varid))) { tok3 = (tok3->next()->str() == "[") ? tok3->tokAt(3) : tok3->next(); tok3->str(value); tok3->varId(valueVarId); ret = true; } // Variable is used in function call.. if (Token::Match(tok3, ("%name% ( " + structname + " %varid% ,").c_str(), varid)) { static const char * const functionName[] = { // always simplify "strcmp", "strdup", // don't simplify buffer value "memcmp","memcpy","memmove","memset","strcpy","strncmp","strncpy" }; for (int i = 0; i < (sizeof(functionName) / sizeof(*functionName)); ++i) { if (valueVarId == 0U && i >= 2) break; if (tok3->str() == functionName[i]) { Token *par1 = tok3->tokAt(2); if (!structname.empty()) { par1->deleteNext(); par1->deleteThis(); } par1->str(value); par1->varId(valueVarId); break; } } } // Variable is used as 2nd parameter in function call.. if (Token::Match(tok3, ("%name% ( %any% , " + structname + " %varid% ,|)").c_str(), varid)) { static const char * const functionName[] = { // always simplify "strcmp","strcpy","strncmp","strncpy", // don't simplify buffer value "memcmp","memcpy","memmove" }; for (int i = 0; i < (sizeof(functionName) / sizeof(*functionName)); ++i) { if (valueVarId == 0U && i >= 4) break; if (tok3->str() == functionName[i]) { Token *par = tok3->tokAt(4); if (!structname.empty()) { par->deleteNext(); par->deleteThis(); } par->str(value); par->varId(valueVarId); break; } } } // array usage if (value[0] != '\"' && Token::Match(tok3, ("[(,] " + structname + " %varid% [|%cop%").c_str(), varid)) { if (!structname.empty()) { tok3->deleteNext(2); } tok3 = tok3->next(); tok3->str(value); tok3->varId(valueVarId); ret = true; } // The >> operator is sometimes used to assign a variable in C++ if (isCPP() && Token::Match(tok3, (">> " + structname + " %varid%").c_str(), varid)) { // bailout for such code: ; std :: cin >> i ; const Token *prev = tok3->previous(); while (prev && prev->str() != "return" && Token::Match(prev, "%name%|::|*")) prev = prev->previous(); if (Token::Match(prev, ";|{|}|>>")) break; } // Variable is used in calculation.. if (((tok3->previous()->varId() > 0) && Token::Match(tok3, ("& " + structname + " %varid%").c_str(), varid)) || (Token::Match(tok3, ("[=+-*/%^|[] " + structname + " %varid% [=?+-*/%^|;])]").c_str(), varid) && !Token::Match(tok3, ("= " + structname + " %name% =").c_str())) || Token::Match(tok3, ("[(=+-*/%^|[] " + structname + " %varid% <<|>>").c_str(), varid) || Token::Match(tok3, ("<<|>> " + structname + " %varid% %cop%|;|]|)").c_str(), varid) || Token::Match(tok3->previous(), ("[=+-*/%^|[] ( " + structname + " %varid% !!=").c_str(), varid)) { if (value[0] == '\"') break; if (!structname.empty()) { tok3->deleteNext(2); ret = true; } tok3 = tok3->next(); if (tok3->str() != value) ret = true; tok3->str(value); tok3->varId(valueVarId); if (tok3->previous()->str() == "*" && (valueIsPointer || Token::Match(valueToken, "& %name% ;"))) { tok3 = tok3->previous(); tok3->deleteThis(); ret = true; } else if (Token::Match(valueToken, "& %name% ;")) tok3->insertToken("&", emptyString, true); } if (Token::simpleMatch(tok3, "= {")) { const Token* const end4 = tok3->linkAt(1); for (const Token *tok4 = tok3; tok4 != end4; tok4 = tok4->next()) { if (Token::Match(tok4, "{|, %varid% ,|}", varid)) { tok4->next()->str(value); tok4->next()->varId(valueVarId); ret = true; } } } // Using the variable in for-condition.. if (Token::simpleMatch(tok3, "for (")) { for (Token *tok4 = tok3->tokAt(2); tok4; tok4 = tok4->next()) { if (Token::Match(tok4, "(|)")) break; // Replace variable used in condition.. if (Token::Match(tok4, "; %name% <|<=|!= %name% ; ++| %name% ++| )")) { const Token *inctok = tok4->tokAt(5); if (inctok->str() == "++") inctok = inctok->next(); if (inctok->varId() == varid) break; if (tok4->next()->varId() == varid) { tok4->next()->str(value); tok4->next()->varId(valueVarId); ret = true; } if (tok4->tokAt(3)->varId() == varid) { tok4->tokAt(3)->str(value); tok4->tokAt(3)->varId(valueVarId); ret = true; } } } } if (indentlevel == indentlevel3 && Token::Match(tok3->next(), "%varid% ++|--", varid) && MathLib::isInt(value)) { const std::string op(tok3->strAt(2)); if (Token::Match(tok3, "[{};] %any% %any% ;")) { tok3->deleteNext(3); } else { tok3 = tok3->next(); tok3->str(value); tok3->varId(valueVarId); tok3->deleteNext(); } value = MathLib::incdec(value, op); if (!Token::simpleMatch((*tok2)->tokAt(-2), "for (")) { (*tok2)->tokAt(2)->str(value); (*tok2)->tokAt(2)->varId(valueVarId); } ret = true; } if (indentlevel == indentlevel3 && Token::Match(tok3->next(), "++|-- %varid%", varid) && MathLib::isInt(value) && !Token::Match(tok3->tokAt(3), "[.[]")) { value = MathLib::incdec(value, tok3->next()->str()); (*tok2)->tokAt(2)->str(value); (*tok2)->tokAt(2)->varId(valueVarId); if (Token::Match(tok3, "[;{}] %any% %any% ;")) { tok3->deleteNext(3); } else { tok3->deleteNext(); tok3->next()->str(value); tok3->next()->varId(valueVarId); } tok3 = tok3->next(); ret = true; } // return variable.. if (Token::Match(tok3, "return %varid% %any%", varid) && valueToken->str() != "&" && (tok3->tokAt(2)->isExtendedOp() || tok3->strAt(2) == ";") && value[0] != '\"') { tok3->next()->str(value); tok3->next()->varId(valueVarId); } else if (pointeralias && Token::Match(tok3, "return * %varid% ;", varid) && value[0] != '\"') { tok3->deleteNext(); tok3->next()->str(value); tok3->next()->varId(valueVarId); } } return ret; } void Tokenizer::elseif() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::simpleMatch(tok, "else if")) continue; for (Token *tok2 = tok; tok2; tok2 = tok2->next()) { if (Token::Match(tok2, "(|{|[")) tok2 = tok2->link(); if (Token::Match(tok2, "}|;")) { if (tok2->next() && tok2->next()->str() != "else") { tok->insertToken("{"); tok2->insertToken("}"); Token::createMutualLinks(tok->next(), tok2->next()); break; } } } } } void Tokenizer::simplifyIfSwitchForInit() { if (!isCPP() || mSettings->standards.cpp < Standards::CPP17) return; const bool forInit = (mSettings->standards.cpp >= Standards::CPP20); for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "if|switch|for (")) continue; Token *semicolon = tok->tokAt(2); while (!Token::Match(semicolon, "[;)]")) { if (Token::Match(semicolon, "(|{|[") && semicolon->link()) semicolon = semicolon->link(); semicolon = semicolon->next(); } if (semicolon->str() != ";") continue; if (tok->str() == "for") { if (!forInit) continue; // Is it a for range.. const Token *tok2 = semicolon->next(); bool rangeFor = false; while (!Token::Match(tok2, "[;)]")) { if (tok2->str() == "(") tok2 = tok2->link(); else if (!rangeFor && tok2->str() == "?") break; else if (tok2->str() == ":") rangeFor = true; tok2 = tok2->next(); } if (!rangeFor || tok2->str() != ")") continue; } Token *endpar = tok->linkAt(1); if (!Token::simpleMatch(endpar, ") {")) continue; Token *endscope = endpar->linkAt(1); if (Token::simpleMatch(endscope, "} else {")) endscope = endscope->linkAt(2); // Simplify, the initialization expression is broken out.. semicolon->insertToken(tok->str()); semicolon->next()->insertToken("("); Token::createMutualLinks(semicolon->next()->next(), endpar); tok->deleteNext(); tok->str("{"); endscope->insertToken("}"); Token::createMutualLinks(tok, endscope->next()); } } bool Tokenizer::simplifyRedundantParentheses() { bool ret = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "(") continue; if (isCPP() && Token::simpleMatch(tok->previous(), "} (") && Token::Match(tok->previous()->link()->previous(), "%name%|> {")) continue; if (Token::simpleMatch(tok, "( {")) continue; if (Token::Match(tok->link(), ") %num%")) { tok = tok->link(); continue; } // Do not simplify if there is comma inside parentheses.. if (Token::Match(tok->previous(), "%op% (") || Token::Match(tok->link(), ") %op%")) { bool innerComma = false; for (const Token *inner = tok->link()->previous(); inner != tok; inner = inner->previous()) { if (inner->str() == ")") inner = inner->link(); if (inner->str() == ",") { innerComma = true; break; } } if (innerComma) continue; } // !!operator = ( x ) ; if (tok->strAt(-2) != "operator" && tok->previous() && tok->previous()->str() == "=" && tok->next() && tok->next()->str() != "{" && Token::simpleMatch(tok->link(), ") ;")) { tok->link()->deleteThis(); tok->deleteThis(); continue; } while (Token::simpleMatch(tok, "( (") && tok->link() && tok->link()->previous() == tok->next()->link()) { // We have "(( *something* ))", remove the inner // parentheses tok->deleteNext(); tok->link()->tokAt(-2)->deleteNext(); ret = true; } if (isCPP() && Token::Match(tok->tokAt(-2), "[;{}=(] new (") && Token::Match(tok->link(), ") [;,{}[]")) { // Remove the parentheses in "new (type)" constructs tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (Token::Match(tok->previous(), "! ( %name% )")) { // Remove the parentheses tok->deleteThis(); tok->deleteNext(); ret = true; } if (Token::Match(tok->previous(), "[(,;{}] ( %name% ) .")) { // Remove the parentheses tok->deleteThis(); tok->deleteNext(); ret = true; } if (Token::Match(tok->previous(), "[(,;{}] ( %name% (") && tok->link()->previous() == tok->linkAt(2)) { // We have "( func ( *something* ))", remove the outer // parentheses tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (Token::Match(tok->previous(), "[,;{}] ( delete [| ]| %name% ) ;")) { // We have "( delete [| ]| var )", remove the outer // parentheses tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (!Token::simpleMatch(tok->tokAt(-2), "operator delete") && Token::Match(tok->previous(), "delete|; (") && (tok->previous()->str() != "delete" || tok->next()->varId() > 0) && Token::Match(tok->link(), ") ;|,")) { tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (Token::Match(tok->previous(), "[(!*;{}] ( %name% )") && (tok->next()->varId() != 0 || Token::Match(tok->tokAt(3), "[+-/=]")) && !tok->next()->isStandardType()) { // We have "( var )", remove the parentheses tok->deleteThis(); tok->deleteNext(); ret = true; } while (Token::Match(tok->previous(), "[;{}[(,!*] ( %name% .")) { Token *tok2 = tok->tokAt(2); while (Token::Match(tok2, ". %name%")) { tok2 = tok2->tokAt(2); } if (tok2 != tok->link()) break; // We have "( var . var . ... . var )", remove the parentheses tok = tok->previous(); tok->deleteNext(); tok2->deleteThis(); ret = true; } if (Token::simpleMatch(tok->previous(), "? (") && Token::simpleMatch(tok->link(), ") :")) { const Token *tok2 = tok->next(); while (tok2 && (Token::Match(tok2,"%bool%|%num%|%name%") || tok2->isArithmeticalOp())) tok2 = tok2->next(); if (tok2 && tok2->str() == ")") { tok->link()->deleteThis(); tok->deleteThis(); ret = true; continue; } } while (Token::Match(tok->previous(), "[{([,] ( !!{") && Token::Match(tok->link(), ") [;,])]") && !Token::simpleMatch(tok->tokAt(-2), "operator ,") && // Ticket #5709 !Token::findsimplematch(tok, ",", tok->link())) { // We have "( ... )", remove the parentheses tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (Token::simpleMatch(tok->previous(), ", (") && Token::simpleMatch(tok->link(), ") =")) { tok->link()->deleteThis(); tok->deleteThis(); ret = true; } // Simplify "!!operator !!%name%|)|]|>|>> ( %num%|%bool% ) %op%|;|,|)" if (Token::Match(tok, "( %bool%|%num% ) %cop%|;|,|)") && tok->strAt(-2) != "operator" && tok->previous() && !Token::Match(tok->previous(), "%name%|)|]") && (!(isCPP() && Token::Match(tok->previous(),">|>>")))) { tok->link()->deleteThis(); tok->deleteThis(); ret = true; } if (Token::Match(tok->previous(), "*|& ( %name% )")) { // We may have a variable declaration looking like "type_name *(var_name)" Token *tok2 = tok->tokAt(-2); while (Token::Match(tok2, "%type%|static|const|extern") && tok2->str() != "operator") { tok2 = tok2->previous(); } if (tok2 && !Token::Match(tok2, "[;,{]")) { // Not a variable declaration } else { tok->deleteThis(); tok->deleteNext(); } } } return ret; } void Tokenizer::simplifyTypeIntrinsics() { static const std::unordered_map intrinsics = { { "__has_nothrow_assign", "has_nothrow_assign" }, { "__has_nothrow_constructor", "has_nothrow_constructor" }, { "__has_nothrow_copy", "has_nothrow_copy" }, { "__has_trivial_assign", "has_trivial_assign" }, { "__has_trivial_constructor", "has_trivial_constructor" }, { "__has_trivial_copy", "has_trivial_copy" }, { "__has_trivial_destructor", "has_trivial_destructor" }, { "__has_virtual_destructor", "has_virtual_destructor" }, { "__is_abstract", "is_abstract" }, { "__is_aggregate", "is_aggregate" }, { "__is_assignable", "is_assignable" }, { "__is_base_of", "is_base_of" }, { "__is_class", "is_class" }, { "__is_constructible", "is_constructible" }, { "__is_convertible_to", "is_convertible_to" }, { "__is_destructible", "is_destructible" }, { "__is_empty", "is_empty" }, { "__is_enum", "is_enum" }, { "__is_final", "is_final" }, { "__is_nothrow_assignable", "is_nothrow_assignable" }, { "__is_nothrow_constructible", "is_nothrow_constructible" }, { "__is_nothrow_destructible", "is_nothrow_destructible" }, { "__is_pod", "is_pod" }, { "__is_polymorphic", "is_polymorphic" }, { "__is_trivially_assignable", "is_trivially_assignable" }, { "__is_trivially_constructible", "is_trivially_constructible" }, { "__is_union", "is_union" }, }; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "%name% (")) continue; auto p = intrinsics.find(tok->str()); if (p == intrinsics.end()) continue; Token * end = tok->next()->link(); Token * prev = tok->previous(); tok->str(p->second); prev->insertToken("::"); prev->insertToken("std"); tok->next()->str("<"); end->str(">"); end->insertToken("}"); end->insertToken("{"); Token::createMutualLinks(end->tokAt(1), end->tokAt(2)); } } void Tokenizer::simplifyCharAt() { // Replace "string"[0] with 's' for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%str% [ %num% ]")) { const MathLib::bigint index = MathLib::toLongNumber(tok->strAt(2)); // Check within range if (index >= 0 && index <= Token::getStrLength(tok)) { tok->str("'" + Token::getCharAt(tok, index) + "'"); tok->deleteNext(3); } } } } void Tokenizer::simplifyReference() { if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { // starting executable scope.. Token *start = const_cast(startOfExecutableScope(tok)); if (start) { tok = start; // replace references in this scope.. Token * const end = tok->link(); for (Token *tok2 = tok; tok2 && tok2 != end; tok2 = tok2->next()) { // found a reference.. if (Token::Match(tok2, "[;{}] %type% & %name% (|= %name% )| ;")) { const int refId = tok2->tokAt(3)->varId(); if (!refId) continue; // replace reference in the code.. for (Token *tok3 = tok2->tokAt(7); tok3 && tok3 != end; tok3 = tok3->next()) { if (tok3->varId() == refId) { tok3->str(tok2->strAt(5)); tok3->varId(tok2->tokAt(5)->varId()); } } tok2->deleteNext(6+(tok2->strAt(6)==")" ? 1 : 0)); } } tok = end; } } } bool Tokenizer::simplifyCalculations() { return mTemplateSimplifier->simplifyCalculations(nullptr, nullptr, false); } void Tokenizer::simplifyOffsetPointerDereference() { // Replace "*(str + num)" => "str[num]" and // Replace "*(str - num)" => "str[-num]" for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName() && !tok->isLiteral() && !Token::Match(tok, "]|)|++|--") && Token::Match(tok->next(), "* ( %name% +|- %num%|%name% )")) { // remove '* (' tok->deleteNext(2); // '+'->'[' tok = tok->tokAt(2); Token* const openBraceTok = tok; const bool isNegativeIndex = (tok->str() == "-"); tok->str("["); // Insert a "-" in front of the number or variable if (isNegativeIndex) { if (tok->next()->isName()) { tok->insertToken("-"); tok = tok->next(); } else tok->next()->str(std::string("-") + tok->next()->str()); } tok = tok->tokAt(2); tok->str("]"); Token::createMutualLinks(openBraceTok, tok); } } } void Tokenizer::simplifyOffsetPointerReference() { std::set pod; for (const Token *tok = list.front(); tok; tok = tok->next()) { if (tok->isStandardType()) { tok = tok->next(); while (tok && (tok->str() == "*" || tok->isName())) { if (tok->varId() > 0) { pod.insert(tok->varId()); break; } tok = tok->next(); } if (!tok) break; } } for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "%num%|%name%|]|)") && (Token::Match(tok->next(), "& %name% [ %num%|%name% ] !!["))) { tok = tok->next(); if (tok->next()->varId()) { if (pod.find(tok->next()->varId()) == pod.end()) { tok = tok->tokAt(5); if (!tok) syntaxError(tok); continue; } } // '&' => '(' tok->str("("); tok = tok->next(); // '[' => '+' tok->deleteNext(); tok->insertToken("+"); tok = tok->tokAt(3); //remove ']' tok->str(")"); Token::createMutualLinks(tok->tokAt(-4), tok); } } } void Tokenizer::simplifyNestedStrcat() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "[;{}] strcat ( strcat (")) { continue; } // find inner strcat call Token *tok2 = tok->tokAt(3); while (Token::simpleMatch(tok2, "strcat ( strcat")) tok2 = tok2->tokAt(2); if (tok2->strAt(3) != ",") continue; // If we have this code: // strcat(strcat(dst, foo), bar); // We move this part of code before all strcat() calls: strcat(dst, foo) // And place "dst" token where the code was. Token *prevTok = tok2->previous(); // Move tokens to new place Token::move(tok2, tok2->next()->link(), tok); tok = tok2->next()->link(); // Insert the "dst" token prevTok->insertToken(tok2->strAt(2)); prevTok->next()->varId(tok2->tokAt(2)->varId()); // Insert semicolon after the moved strcat() tok->insertToken(";"); } } static const std::set stdFunctionsPresentInC = { "strcat", "strcpy", "strncat", "strncpy", "free", "malloc", "strdup" }; void Tokenizer::simplifyStd() { if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "std") continue; if (Token::Match(tok->previous(), "[(,{};] std :: %name% (") && stdFunctionsPresentInC.find(tok->strAt(2)) != stdFunctionsPresentInC.end()) { tok->deleteNext(); tok->deleteThis(); } } } //--------------------------------------------------------------------------- // Helper functions for handling the tokens list //--------------------------------------------------------------------------- //--------------------------------------------------------------------------- bool Tokenizer::isScopeNoReturn(const Token *endScopeToken, bool *unknown) const { std::string unknownFunc; const bool ret = mSettings->library.isScopeNoReturn(endScopeToken,&unknownFunc); if (!unknownFunc.empty() && mSettings->summaryReturn.find(unknownFunc) != mSettings->summaryReturn.end()) { return false; } if (unknown) *unknown = !unknownFunc.empty(); if (!unknownFunc.empty() && mSettings->checkLibrary && mSettings->severity.isEnabled(Severity::information)) { // Is function global? bool globalFunction = true; if (Token::simpleMatch(endScopeToken->tokAt(-2), ") ; }")) { const Token * const ftok = endScopeToken->linkAt(-2)->previous(); if (ftok && ftok->isName() && ftok->function() && ftok->function()->nestedIn && ftok->function()->nestedIn->type != Scope::eGlobal) { globalFunction = false; } } // don't warn for nonglobal functions (class methods, functions hidden in namespaces) since they can't be configured yet // FIXME: when methods and namespaces can be configured properly, remove the "globalFunction" check if (globalFunction) { reportError(endScopeToken->previous(), Severity::information, "checkLibraryNoReturn", "--check-library: Function " + unknownFunc + "() should have configuration"); } } return ret; } //--------------------------------------------------------------------------- bool Tokenizer::isFunctionParameterPassedByValue(const Token *fpar) const { // TODO: If symbol database is available, use it. const Token *ftok; // Look at function call, what parameter number is it? int parameter = 1; for (ftok = fpar->previous(); ftok; ftok = ftok->previous()) { if (ftok->str() == "(") break; else if (ftok->str() == ")") ftok = ftok->link(); else if (ftok->str() == ",") ++parameter; else if (Token::Match(ftok, "[;{}]")) break; } // Is this a function call? if (ftok && Token::Match(ftok->tokAt(-2), "[;{}=] %name% (")) { const std::string& functionName(ftok->previous()->str()); if (functionName == "return") return true; // Locate function declaration.. for (const Token *tok = tokens(); tok; tok = tok->next()) { if (tok->str() == "{") tok = tok->link(); else if (Token::Match(tok, "%type% (") && tok->str() == functionName) { // Goto parameter tok = tok->tokAt(2); int par = 1; while (tok && par < parameter) { if (tok->str() == ")") break; if (tok->str() == ",") ++par; tok = tok->next(); } if (!tok) return false; // If parameter was found, determine if it's passed by value if (par == parameter) { bool knowntype = false; while (tok && tok->isName()) { knowntype |= tok->isStandardType(); knowntype |= (tok->str() == "struct"); tok = tok->next(); } if (!tok || !knowntype) return false; if (tok->str() != "," && tok->str() != ")") return false; return true; } } } } return false; } //--------------------------------------------------------------------------- void Tokenizer::eraseDeadCode(Token *begin, const Token *end) { if (!begin) return; const bool isgoto = Token::Match(begin->tokAt(-2), "goto %name% ;"); int indentlevel = 1; int indentcase = 0; int indentswitch = 0; int indentlabel = 0; int roundbraces = 0; int indentcheck = 0; std::vector switchindents; bool checklabel = false; Token *tok = begin; Token *tokcheck = nullptr; while (tok->next() && tok->next() != end) { if (tok->next()->str() == "(") { ++roundbraces; tok->deleteNext(); continue; } else if (tok->next()->str() == ")") { if (!roundbraces) break; //too many ending round parentheses --roundbraces; tok->deleteNext(); continue; } if (roundbraces) { tok->deleteNext(); continue; } if (Token::Match(tok, "[{};] switch (")) { if (!checklabel) { if (!indentlabel) { //remove 'switch ( ... )' Token::eraseTokens(tok, tok->linkAt(2)->next()); } else { tok = tok->linkAt(2); } if (tok->next()->str() == "{") { ++indentswitch; indentcase = indentlevel + 1; switchindents.push_back(indentcase); } } else { tok = tok->linkAt(2); if (Token::simpleMatch(tok, ") {")) { ++indentswitch; indentcase = indentlevel + 1; switchindents.push_back(indentcase); } } } else if (tok->next()->str() == "{") { ++indentlevel; if (!checklabel) { checklabel = true; tokcheck = tok; indentcheck = indentlevel; indentlabel = 0; } tok = tok->next(); } else if (tok->next()->str() == "}") { --indentlevel; if (!indentlevel) break; if (!checklabel) { tok->deleteNext(); } else { if (indentswitch && indentlevel == indentcase) --indentlevel; if (indentlevel < indentcheck) { const Token *end2 = tok->next(); tok = end2->link()->previous(); //return to initial '{' if (indentswitch && Token::simpleMatch(tok, ") {") && Token::Match(tok->link()->tokAt(-2), "[{};] switch (")) tok = tok->link()->tokAt(-2); //remove also 'switch ( ... )' Token::eraseTokens(tok, end2->next()); checklabel = false; tokcheck = nullptr; indentcheck = 0; } else { tok = tok->next(); } } if (indentswitch && indentlevel <= indentcase) { --indentswitch; switchindents.pop_back(); if (!indentswitch) indentcase = 0; else indentcase = switchindents[indentswitch-1]; } } else if (Token::Match(tok, "[{};:] case")) { const Token *tok2 = Token::findsimplematch(tok->next(), ": ;", end); if (!tok2) { tok->deleteNext(); continue; } if (indentlevel == 1) break; //it seems like the function was called inside a case-default block. if (indentlevel == indentcase) ++indentlevel; tok2 = tok2->next(); if (!checklabel || !indentswitch) { Token::eraseTokens(tok, tok2->next()); } else { tok = const_cast(tok2); } } else if (Token::Match(tok, "[{};] default : ;")) { if (indentlevel == 1) break; //it seems like the function was called inside a case-default block. if (indentlevel == indentcase) ++indentlevel; if (!checklabel || !indentswitch) { tok->deleteNext(3); } else { tok = tok->tokAt(3); } } else if (Token::Match(tok, "[{};] %name% : ;") && tok->next()->str() != "default") { if (checklabel) { indentlabel = indentlevel; tok = tokcheck->next(); checklabel = false; indentlevel = indentcheck; } else { if (indentswitch) { //Before stopping the function, since the 'switch()' //instruction is removed, there's no sense to keep the //case instructions. Remove them, if there are any. Token *tok2 = tok->tokAt(3); int indentlevel2 = indentlevel; while (tok2->next() && tok2->next() != end) { if (Token::Match(tok2->next(), "{|[|(")) { tok2 = tok2->next()->link(); } else if (Token::Match(tok2, "[{};:] case")) { const Token *tok3 = Token::findsimplematch(tok2->next(), ": ;", end); if (!tok3) { tok2 = tok2->next(); continue; } Token::eraseTokens(tok2, tok3->next()); } else if (Token::Match(tok2, "[{};] default : ;")) { tok2->deleteNext(3); } else if (tok2->next()->str() == "}") { --indentlevel2; if (indentlevel2 <= indentcase) break; tok2 = tok2->next(); } else { tok2 = tok2->next(); } } } break; //stop removing tokens, we arrived to the label. } } else if (isgoto && Token::Match(tok, "[{};] do|while|for|BOOST_FOREACH")) { //it's possible that code inside loop is not dead, //because of the possible presence of the label pointed by 'goto' const Token *start = tok->tokAt(2); if (start && start->str() == "(") start = start->link()->next(); if (start && start->str() == "{") { std::string labelpattern = "[{};] " + begin->previous()->str() + " : ;"; bool simplify = true; for (Token *tok2 = start->next(); tok2 != start->link(); tok2 = tok2->next()) { if (Token::Match(tok2, labelpattern.c_str())) { simplify = false; break; } } //bailout for now if (!simplify) break; } tok->deleteNext(); } else { // no need to keep the other strings, remove them. if (tok->strAt(1) == "while") { if (tok->str() == "}" && tok->link()->strAt(-1) == "do") tok->link()->previous()->deleteThis(); } tok->deleteNext(); } } } //--------------------------------------------------------------------------- void Tokenizer::syntaxError(const Token *tok, const std::string &code) const { printDebugOutput(0); throw InternalError(tok, code.empty() ? "syntax error" : "syntax error: " + code, InternalError::SYNTAX); } void Tokenizer::unmatchedToken(const Token *tok) const { printDebugOutput(0); throw InternalError(tok, "Unmatched '" + tok->str() + "'. Configuration: '" + mConfiguration + "'.", InternalError::SYNTAX); } void Tokenizer::syntaxErrorC(const Token *tok, const std::string &what) const { printDebugOutput(0); throw InternalError(tok, "Code '"+what+"' is invalid C code. Use --std or --language to configure the language.", InternalError::SYNTAX); } void Tokenizer::unknownMacroError(const Token *tok1) const { printDebugOutput(0); throw InternalError(tok1, "There is an unknown macro here somewhere. Configuration is required. If " + tok1->str() + " is a macro then please configure it.", InternalError::UNKNOWN_MACRO); } void Tokenizer::unhandled_macro_class_x_y(const Token *tok) const { reportError(tok, Severity::information, "class_X_Y", "The code '" + tok->str() + " " + tok->strAt(1) + " " + tok->strAt(2) + " " + tok->strAt(3) + "' is not handled. You can use -I or --include to add handling of this code."); } void Tokenizer::macroWithSemicolonError(const Token *tok, const std::string ¯oName) const { reportError(tok, Severity::information, "macroWithSemicolon", "Ensure that '" + macroName + "' is defined either using -I, --include or -D."); } void Tokenizer::cppcheckError(const Token *tok) const { printDebugOutput(0); throw InternalError(tok, "Analysis failed. If the code is valid then please report this failure.", InternalError::INTERNAL); } void Tokenizer::unhandledCharLiteral(const Token *tok, const std::string& msg) const { std::string s = tok ? (" " + tok->str()) : ""; for (int i = 0; i < s.size(); ++i) { if ((unsigned char)s[i] >= 0x80) s.clear(); } reportError(tok, Severity::portability, "nonStandardCharLiteral", "Non-standard character literal" + s + ". " + msg); } /** * Helper function to check whether number is equal to integer constant X * or floating point pattern X.0 * @param s the string to check * @param intConstant the integer constant to check against * @param floatConstant the string with stringified float constant to check against * @return true in case s is equal to X or X.0 and false otherwise. */ static bool isNumberOneOf(const std::string &s, const MathLib::bigint& intConstant, const char* floatConstant) { if (MathLib::isInt(s)) { if (MathLib::toLongNumber(s) == intConstant) return true; } else if (MathLib::isFloat(s)) { if (MathLib::toString(MathLib::toDoubleNumber(s)) == floatConstant) return true; } return false; } // ------------------------------------------------------------------------ // Helper function to check whether number is zero (0 or 0.0 or 0E+0) or not? // @param s the string to check // @return true in case s is zero and false otherwise. // ------------------------------------------------------------------------ bool Tokenizer::isZeroNumber(const std::string &s) { return isNumberOneOf(s, 0L, "0.0"); } // ------------------------------------------------------------------------ // Helper function to check whether number is one (1 or 0.1E+1 or 1E+0) or not? // @param s the string to check // @return true in case s is one and false otherwise. // ------------------------------------------------------------------------ bool Tokenizer::isOneNumber(const std::string &s) { if (!MathLib::isPositive(s)) return false; return isNumberOneOf(s, 1L, "1.0"); } // ------------------------------------------------------------------------ // Helper function to check whether number is two (2 or 0.2E+1 or 2E+0) or not? // @param s the string to check // @return true in case s is two and false otherwise. // ------------------------------------------------------------------------ bool Tokenizer::isTwoNumber(const std::string &s) { if (!MathLib::isPositive(s)) return false; return isNumberOneOf(s, 2L, "2.0"); } // ------------------------------------------------------ // Simplify math functions. // It simplifies the following functions: atol(), fmin(), // fminl(), fminf(), fmax(), fmaxl(), fmaxf(), pow(), // powf(), powl(), cbrt(), cbrtl(), cbtrf(), sqrt(), // sqrtf(), sqrtl(), exp(), expf(), expl(), exp2(), // exp2f(), exp2l(), log2(), log2f(), log2l(), log1p(), // log1pf(), log1pl(), log10(), log10l(), log10f(), // log(), logf(), logl(), logb(), logbf(), logbl(), acosh() // acoshf(), acoshl(), acos(), acosf(), acosl(), cosh() // coshf(), coshf(), cos(), cosf(), cosl(), erfc(), // erfcf(), erfcl(), ilogb(), ilogbf(), ilogbf(), erf(), // erfl(), erff(), asin(), asinf(), asinf(), asinh(), // asinhf(), asinhl(), tan(), tanf(), tanl(), tanh(), // tanhf(), tanhl(), atan(), atanf(), atanl(), atanh(), // atanhf(), atanhl(), expm1(), expm1l(), expm1f(), sin(), // sinf(), sinl(), sinh(), sinhf(), sinhl() // in the tokenlist. // // Reference: // - http://www.cplusplus.com/reference/cmath/ // ------------------------------------------------------ void Tokenizer::simplifyMathFunctions() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->isName() && !tok->varId() && tok->strAt(1) == "(") { // precondition for function bool simplifcationMade = false; if (Token::Match(tok, "atol ( %str% )")) { //@todo Add support for atoll() if (Token::simpleMatch(tok->tokAt(-2), "std ::")) { tok = tok->tokAt(-2);// set token index two steps back tok->deleteNext(2); // delete "std ::" } const std::string& strNumber = tok->tokAt(2)->strValue(); // get number const bool isNotAnInteger = (!MathLib::isInt(strNumber));// check: is not an integer if (strNumber.empty() || isNotAnInteger) { // Ignore strings which we can't convert continue; } // Convert string into a number and insert into token list tok->str(MathLib::toString(MathLib::toLongNumber(strNumber))); // remove ( %num% ) tok->deleteNext(3); simplifcationMade = true; } else if (Token::Match(tok, "sqrt|sqrtf|sqrtl|cbrt|cbrtf|cbrtl ( %num% )")) { // Simplify: sqrt(0) = 0 and cbrt(0) == 0 // sqrt(1) = 1 and cbrt(1) == 1 // get number string const std::string& parameter(tok->strAt(2)); // is parameter 0 ? if (isZeroNumber(parameter)) { tok->deleteNext(3); // delete tokens tok->str("0"); // insert result into token list simplifcationMade = true; } else if (isOneNumber(parameter)) { tok->deleteNext(3); // delete tokens tok->str("1"); // insert result into token list simplifcationMade = true; } } else if (Token::Match(tok, "exp|expf|expl|exp2|exp2f|exp2l|cos|cosf|cosl|cosh|coshf|coshl|erfc|erfcf|erfcl ( %num% )")) { // Simplify: exp[f|l](0) = 1 and exp2[f|l](0) = 1 // cosh[f|l](0) = 1 and cos[f|l](0) = 1 // erfc[f|l](0) = 1 // get number string const std::string& parameter(tok->strAt(2)); // is parameter 0 ? if (isZeroNumber(parameter)) { tok->deleteNext(3); // delete tokens tok->str("1"); // insert result into token list simplifcationMade = true; } } else if (Token::Match(tok, "log1p|log1pf|log1pl|sin|sinf|sinl|sinh|sinhf|sinhl|erf|erff|erfl|asin|asinf|asinl|asinh|asinhf|asinhl|tan|tanf|tanl|tanh|tanhf|tanhl|atan|atanf|atanl|atanh|atanhf|atanhl|expm1|expm1f|expm1l ( %num% )")) { // Simplify: log1p[f|l](0) = 0 and sin[f|l](0) = 0 // sinh[f|l](0) = 0 and erf[f|l](0) = 0 // asin[f|l](0) = 0 and sinh[f|l](0) = 0 // tan[f|l](0) = 0 and tanh[f|l](0) = 0 // atan[f|l](0) = 0 and atanh[f|l](0)= 0 // expm1[f|l](0) = 0 // get number string const std::string& parameter(tok->strAt(2)); // is parameter 0 ? if (isZeroNumber(parameter)) { tok->deleteNext(3); // delete tokens tok->str("0"); // insert result into token list simplifcationMade = true; } } else if (Token::Match(tok, "log2|log2f|log2l|log|logf|logl|log10|log10f|log10l|logb|logbf|logbl|acosh|acoshf|acoshl|acos|acosf|acosl|ilogb|ilogbf|ilogbl ( %num% )")) { // Simplify: log2[f|l](1) = 0 , log10[f|l](1) = 0 // log[f|l](1) = 0 , logb10[f|l](1) = 0 // acosh[f|l](1) = 0 , acos[f|l](1) = 0 // ilogb[f|l](1) = 0 // get number string const std::string& parameter(tok->strAt(2)); // is parameter 1 ? if (isOneNumber(parameter)) { tok->deleteNext(3); // delete tokens tok->str("0"); // insert result into token list simplifcationMade = true; } } else if (Token::Match(tok, "fmin|fminl|fminf ( %num% , %num% )")) { // @todo if one of the parameters is NaN the other is returned // e.g. printf ("fmin (NaN, -1.0) = %f\n", fmin(NaN,-1.0)); // e.g. printf ("fmin (-1.0, NaN) = %f\n", fmin(-1.0,NaN)); const std::string& strLeftNumber(tok->strAt(2)); const std::string& strRightNumber(tok->strAt(4)); const bool isLessEqual = MathLib::isLessEqual(strLeftNumber, strRightNumber); // case: left <= right ==> insert left if (isLessEqual) { tok->str(strLeftNumber); // insert e.g. -1.0 tok->deleteNext(5); // delete e.g. fmin ( -1.0, 1.0 ) simplifcationMade = true; } else { // case left > right ==> insert right tok->str(strRightNumber); // insert e.g. 0.0 tok->deleteNext(5); // delete e.g. fmin ( 1.0, 0.0 ) simplifcationMade = true; } } else if (Token::Match(tok, "fmax|fmaxl|fmaxf ( %num% , %num% )")) { // @todo if one of the parameters is NaN the other is returned // e.g. printf ("fmax (NaN, -1.0) = %f\n", fmax(NaN,-1.0)); // e.g. printf ("fmax (-1.0, NaN) = %f\n", fmax(-1.0,NaN)); const std::string& strLeftNumber(tok->strAt(2)); const std::string& strRightNumber(tok->strAt(4)); const bool isLessEqual = MathLib::isLessEqual(strLeftNumber, strRightNumber); // case: left <= right ==> insert right if (isLessEqual) { tok->str(strRightNumber);// insert e.g. 1.0 tok->deleteNext(5); // delete e.g. fmax ( -1.0, 1.0 ) simplifcationMade = true; } else { // case left > right ==> insert left tok->str(strLeftNumber); // insert e.g. 1.0 tok->deleteNext(5); // delete e.g. fmax ( 1.0, 0.0 ) simplifcationMade = true; } } else if (Token::Match(tok, "pow|powf|powl (")) { if (Token::Match(tok->tokAt(2), "%num% , %num% )")) { // In case of pow ( 0 , anyNumber > 0): It can be simplified to 0 // In case of pow ( 0 , 0 ): It simplified to 1 // In case of pow ( 1 , anyNumber ): It simplified to 1 const std::string& leftNumber(tok->strAt(2)); // get the left parameter const std::string& rightNumber(tok->strAt(4)); // get the right parameter const bool isLeftNumberZero = isZeroNumber(leftNumber); const bool isLeftNumberOne = isOneNumber(leftNumber); const bool isRightNumberZero = isZeroNumber(rightNumber); if (isLeftNumberZero && !isRightNumberZero && MathLib::isPositive(rightNumber)) { // case: 0^(y) = 0 and y > 0 tok->deleteNext(5); // delete tokens tok->str("0"); // insert simplified result simplifcationMade = true; } else if (isLeftNumberZero && isRightNumberZero) { // case: 0^0 = 1 tok->deleteNext(5); // delete tokens tok->str("1"); // insert simplified result simplifcationMade = true; } else if (isLeftNumberOne) { // case 1^(y) = 1 tok->deleteNext(5); // delete tokens tok->str("1"); // insert simplified result simplifcationMade = true; } } if (Token::Match(tok->tokAt(2), "%any% , %num% )")) { // In case of pow( x , 1 ): It can be simplified to x. const std::string& leftParameter(tok->strAt(2)); // get the left parameter const std::string& rightNumber(tok->strAt(4)); // get right number if (isOneNumber(rightNumber)) { // case: x^(1) = x tok->str(leftParameter); // insert simplified result tok->deleteNext(5); // delete tokens simplifcationMade = true; } else if (isZeroNumber(rightNumber)) { // case: x^(0) = 1 tok->deleteNext(5); // delete tokens tok->str("1"); // insert simplified result simplifcationMade = true; } } } // Jump back to begin of statement if a simplification was performed if (simplifcationMade) { while (tok->previous() && tok->str() != ";") { tok = tok->previous(); } } } } } void Tokenizer::simplifyComma() { bool inReturn = false; for (Token *tok = list.front(); tok; tok = tok->next()) { // skip enums if (Token::Match(tok, "enum class|struct| %name%| :|{")) { skipEnumBody(&tok); } if (!tok) syntaxError(nullptr); // invalid code like in #4195 if (Token::Match(tok, "(|[") || Token::Match(tok->previous(), "%name%|= {")) { tok = tok->link(); continue; } if (Token::simpleMatch(tok, "= (") && Token::simpleMatch(tok->linkAt(1), ") {")) { tok = tok->linkAt(1)->linkAt(1); continue; } // Skip unhandled template specifiers.. if (tok->link() && tok->str() == "<") tok = tok->link(); if (tok->str() == "return" && Token::Match(tok->previous(), "[;{}]")) inReturn = true; if (inReturn && Token::Match(tok, "[;{}?:]")) inReturn = false; if (!tok->next() || tok->str() != ",") continue; // We must not accept just any keyword, e.g. accepting int // would cause function parameters to corrupt. if (isCPP() && tok->strAt(1) == "delete") { // Handle "delete a, delete b;" tok->str(";"); } if (isCPP() && Token::Match(tok->tokAt(-2), "delete %name% , %name% ;") && tok->next()->varId() != 0) { // Handle "delete a, b;" - convert to delete a; b; tok->str(";"); } else if (!inReturn && tok->tokAt(-2)) { bool replace = false; for (Token *tok2 = tok->previous(); tok2; tok2 = tok2->previous()) { if (tok2->str() == "=") { // Handle "a = 0, b = 0;" replace = true; } else if (isCPP() && (Token::Match(tok2, "delete %name%") || Token::Match(tok2, "delete [ ] %name%"))) { // Handle "delete a, a = 0;" replace = true; } else if (Token::Match(tok2, "[?:;,{}()]")) { if (replace && Token::Match(tok2, "[;{}]")) tok->str(";"); break; } } } // find token where return ends and also count commas if (inReturn) { Token *startFrom = nullptr; // "[;{}]" token before "return" Token *endAt = nullptr; // first ";" token after "[;{}] return" // find "; return" pattern before comma for (Token *tok2 = tok->previous(); tok2; tok2 = tok2->previous()) { if (tok2->str() == "return") { startFrom = tok2->previous(); break; } } if (!startFrom) // to be very sure... return; int commaCounter = 0; for (Token *tok2 = startFrom->next(); tok2; tok2 = tok2->next()) { if (tok2->str() == ";") { endAt = tok2; break; } else if (Token::Match(tok2, "(|[") || (tok2->str() == "{" && tok2->previous() && tok2->previous()->str() == "=")) { tok2 = tok2->link(); } else if (tok2->str() == ",") { ++commaCounter; } } if (!endAt) //probably a syntax error return; if (commaCounter) { // change tokens: // "; return a ( ) , b ( ) , c ;" // to // "; a ( ) ; b ( ) ; return c ;" // remove "return" startFrom->deleteNext(); for (Token *tok2 = startFrom->next(); tok2 != endAt; tok2 = tok2->next()) { if (Token::Match(tok2, "(|[") || (tok2->str() == "{" && tok2->previous() && tok2->previous()->str() == "=")) { tok2 = tok2->link(); } else if (tok2->str() == ",") { tok2->str(";"); --commaCounter; if (commaCounter == 0) { tok2->insertToken("return"); } } } tok = endAt; } } } } void Tokenizer::checkConfiguration() const { if (!mSettings->checkConfiguration) return; for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!Token::Match(tok, "%name% (")) continue; if (tok->isControlFlowKeyword()) continue; for (const Token *tok2 = tok->tokAt(2); tok2 && tok2->str() != ")"; tok2 = tok2->next()) { if (tok2->str() == ";") { macroWithSemicolonError(tok, tok->str()); break; } if (Token::Match(tok2, "(|{")) tok2 = tok2->link(); } } } void Tokenizer::validateC() const { if (isCPP()) return; for (const Token *tok = tokens(); tok; tok = tok->next()) { // That might trigger false positives, but it's much faster to have this truncated pattern if (Token::Match(tok, "const_cast|dynamic_cast|reinterpret_cast|static_cast <")) syntaxErrorC(tok, "C++ cast <..."); // Template function.. if (Token::Match(tok, "%name% < %name% > (")) { const Token *tok2 = tok->tokAt(5); while (tok2 && !Token::Match(tok2, "[()]")) tok2 = tok2->next(); if (Token::simpleMatch(tok2, ") {")) syntaxErrorC(tok, tok->str() + '<' + tok->strAt(2) + ">() {}"); } if (tok->previous() && !Token::Match(tok->previous(), "[;{}]")) continue; if (Token::Match(tok, "using namespace %name% ;")) syntaxErrorC(tok, "using namespace " + tok->strAt(2)); if (Token::Match(tok, "template < class|typename %name% [,>]")) syntaxErrorC(tok, "template<..."); if (Token::Match(tok, "%name% :: %name%")) syntaxErrorC(tok, tok->str() + tok->strAt(1) + tok->strAt(2)); if (Token::Match(tok, "class|namespace %name% [:{]")) syntaxErrorC(tok, tok->str() + tok->strAt(1) + tok->strAt(2)); } } void Tokenizer::validate() const { std::stack linkTokens; const Token *lastTok = nullptr; for (const Token *tok = tokens(); tok; tok = tok->next()) { lastTok = tok; if (Token::Match(tok, "[{([]") || (tok->str() == "<" && tok->link())) { if (tok->link() == nullptr) cppcheckError(tok); linkTokens.push(tok); } else if (Token::Match(tok, "[})]]") || (Token::Match(tok, ">|>>") && tok->link())) { if (tok->link() == nullptr) cppcheckError(tok); if (linkTokens.empty() == true) cppcheckError(tok); if (tok->link() != linkTokens.top()) cppcheckError(tok); if (tok != tok->link()->link()) cppcheckError(tok); linkTokens.pop(); } else if (tok->link() != nullptr) cppcheckError(tok); } if (!linkTokens.empty()) cppcheckError(linkTokens.top()); // Validate that the Tokenizer::list.back() is updated correctly during simplifications if (lastTok != list.back()) cppcheckError(lastTok); } static const Token *findUnmatchedTernaryOp(const Token * const begin, const Token * const end, int depth = 0) { std::stack ternaryOp; for (const Token *tok = begin; tok != end && tok->str() != ";"; tok = tok->next()) { if (tok->str() == "?") ternaryOp.push(tok); else if (!ternaryOp.empty() && tok->str() == ":") ternaryOp.pop(); else if (depth < 100 && Token::Match(tok,"(|[")) { const Token *inner = findUnmatchedTernaryOp(tok->next(), tok->link(), depth+1); if (inner) return inner; tok = tok->link(); } } return ternaryOp.empty() ? nullptr : ternaryOp.top(); } static bool isCPPAttribute(const Token * tok) { return Token::simpleMatch(tok, "[ [") && tok->link() && tok->link()->previous() == tok->linkAt(1); } static bool isAlignAttribute(const Token * tok) { return Token::simpleMatch(tok, "alignas (") && tok->next()->link(); } static const Token* skipCPPOrAlignAttribute(const Token * tok) { if (isCPPAttribute(tok)) { return tok->link(); } else if (isAlignAttribute(tok)) { return tok->next()->link(); } return tok; } static bool isNonMacro(const Token* tok) { if (tok->isKeyword()) return true; if (cAlternativeTokens.count(tok->str()) > 0) return true; if (tok->str().compare(0, 2, "__") == 0) // attribute/annotation return true; return false; } void Tokenizer::reportUnknownMacros() const { // Report unknown macros used in expressions "%name% %num%" for (const Token *tok = tokens(); tok; tok = tok->next()) { if (Token::Match(tok, "%name% %num%")) { // A keyword is not an unknown macro if (tok->isKeyword()) continue; if (Token::Match(tok->previous(), "%op%|(")) unknownMacroError(tok); } } // Report unknown macros that contain several statements "MACRO(a;b;c)" for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!Token::Match(tok, "%name% (")) continue; if (!tok->isUpperCaseName()) continue; const Token *endTok = tok->linkAt(1); for (const Token *inner = tok->tokAt(2); inner != endTok; inner = inner->next()) { if (Token::Match(inner, "[[({]")) inner = inner->link(); else if (inner->str() == ";") unknownMacroError(inner); } } // Report unknown macros that contain struct initialization "MACRO(a, .b=3)" for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!Token::Match(tok, "%name% (")) continue; const Token *endTok = tok->linkAt(1); for (const Token *inner = tok->tokAt(2); inner != endTok; inner = inner->next()) { if (Token::Match(inner, "[[({]")) inner = inner->link(); else if (Token::Match(inner->previous(), "[,(] . %name% =|{")) unknownMacroError(tok); } } // Report unknown macros in non-executable scopes.. std::set possible; for (const Token *tok = tokens(); tok; tok = tok->next()) { // Skip executable scopes.. if (tok->str() == "{") { const Token *prev = tok->previous(); while (prev && prev->isName()) prev = prev->previous(); if (prev && prev->str() == ")") tok = tok->link(); else possible.clear(); } else if (tok->str() == "}") possible.clear(); if (Token::Match(tok, "%name% (") && tok->isUpperCaseName() && Token::simpleMatch(tok->linkAt(1), ") (") && Token::simpleMatch(tok->linkAt(1)->linkAt(1), ") {")) { // A keyword is not an unknown macro if (tok->isKeyword()) continue; const Token *bodyStart = tok->linkAt(1)->linkAt(1)->tokAt(2); const Token *bodyEnd = tok->link(); for (const Token *tok2 = bodyStart; tok2 && tok2 != bodyEnd; tok2 = tok2->next()) { if (Token::Match(tok2, "if|switch|for|while|return")) unknownMacroError(tok); } } else if (Token::Match(tok, "%name% (") && tok->isUpperCaseName() && Token::Match(tok->linkAt(1), ") %name% (") && Token::Match(tok->linkAt(1)->linkAt(2), ") [;{]")) { if (possible.count(tok->str()) == 0) possible.insert(tok->str()); else unknownMacroError(tok); } } // String concatenation with unknown macros for (const Token *tok = tokens(); tok; tok = tok->next()) { if (Token::Match(tok, "%str% %name% (") && Token::Match(tok->linkAt(2), ") %str%")) { if (tok->next()->isKeyword()) continue; unknownMacroError(tok->next()); } if (Token::Match(tok, "[(,] %name% (") && Token::Match(tok->linkAt(2), ") %name% %name%|,|)")) { if (tok->next()->isKeyword() || tok->linkAt(2)->next()->isKeyword()) continue; if (cAlternativeTokens.count(tok->linkAt(2)->next()->str()) > 0) continue; if (tok->next()->str().compare(0, 2, "__") == 0) // attribute/annotation continue; unknownMacroError(tok->next()); } } // Report unknown macros without commas or operators inbetween statements: MACRO1() MACRO2() for (const Token* tok = tokens(); tok; tok = tok->next()) { if (!Token::Match(tok, "%name% (")) continue; if (isNonMacro(tok)) continue; const Token* endTok = tok->linkAt(1); if (!Token::Match(endTok, ") %name% (|.")) continue; const Token* tok2 = endTok->next(); if (isNonMacro(tok2)) continue; if (tok2->next()->str() == "(") { if (Token::Match(tok->previous(), "%name%|::|>")) continue; } unknownMacroError(tok); } } void Tokenizer::findGarbageCode() const { const bool isCPP11 = isCPP() && mSettings->standards.cpp >= Standards::CPP11; static const std::unordered_set nonConsecutiveKeywords{ "break", "continue", "for", "goto", "if", "return", "switch", "throw", "typedef", "while" }; for (const Token *tok = tokens(); tok; tok = tok->next()) { // initialization: = { if (Token::simpleMatch(tok, "= {") && Token::simpleMatch(tok->linkAt(1), "} (")) syntaxError(tok->linkAt(1)); // Inside [] there can't be ; or various keywords else if (tok->str() == "[") { for (const Token* inner = tok->next(); inner != tok->link(); inner = inner->next()) { if (Token::Match(inner, "(|[|{")) inner = inner->link(); else if (Token::Match(inner, ";|goto|return|typedef")) syntaxError(inner); } } // array assignment else if (Token::Match(tok, "%assign% [") && Token::simpleMatch(tok->linkAt(1), "] ;")) syntaxError(tok, tok->str() + "[...];"); // UNKNOWN_MACRO(return) if (tok->isKeyword() && Token::Match(tok, "throw|return )") && Token::Match(tok->linkAt(1)->previous(), "%name% (")) unknownMacroError(tok->linkAt(1)->previous()); // UNKNOWN_MACRO(return) else if (Token::Match(tok, "%name% throw|return") && std::isupper(tok->str()[0])) unknownMacroError(tok); // Assign/increment/decrement literal else if (Token::Match(tok, "!!) %num%|%str%|%char% %assign%|++|--")) syntaxError(tok, tok->next()->str() + " " + tok->strAt(2)); if (tok->isControlFlowKeyword() && Token::Match(tok, "if|while|for|switch")) { // if|while|for|switch (EXPR) { ... } if (tok->previous() && !Token::Match(tok->previous(), "%name%|:|;|{|}|)")) { if (Token::Match(tok->previous(), "[,(]")) { const Token *prev = tok->previous(); while (prev && prev->str() != "(") { if (prev->str() == ")") prev = prev->link(); prev = prev->previous(); } if (prev && Token::Match(prev->previous(), "%name% (")) unknownMacroError(prev->previous()); } if (!Token::simpleMatch(tok->tokAt(-2), "operator \"\" if")) syntaxError(tok); } if (!Token::Match(tok->next(), "( !!)")) syntaxError(tok); if (tok->str() != "for") { if (isGarbageExpr(tok->next(), tok->linkAt(1), mSettings->standards.cpp>=Standards::cppstd_t::CPP17)) syntaxError(tok); } } // keyword keyword if (tok->isKeyword() && nonConsecutiveKeywords.count(tok->str()) != 0) { if (Token::Match(tok, "%name% %name%") && nonConsecutiveKeywords.count(tok->next()->str()) == 1) syntaxError(tok); const Token* prev = tok; while (prev && prev->isName()) prev = prev->previous(); if (Token::Match(prev, "%op%|%num%|%str%|%char%")) { if (!Token::simpleMatch(tok->tokAt(-2), "operator \"\" if") && !Token::simpleMatch(tok->tokAt(-2), "extern \"C\"")) syntaxError(tok, prev == tok->previous() ? (prev->str() + " " + tok->str()) : (prev->str() + " .. " + tok->str())); } } } // invalid struct declaration for (const Token *tok = tokens(); tok; tok = tok->next()) { if (Token::Match(tok, "struct|class|enum %name%| {") && (!tok->previous() || Token::Match(tok->previous(), "[;{}]"))) { const Token *tok2 = tok->linkAt(tok->next()->isName() ? 2 : 1); if (Token::Match(tok2, "} %op%")) { tok2 = tok2->next(); if (!Token::Match(tok2, "*|&|&&")) syntaxError(tok2, "Unexpected token '" + tok2->str() + "'"); while (Token::Match(tok2, "*|&|&&")) tok2 = tok2->next(); if (!Token::Match(tok2, "%name%")) syntaxError(tok2, "Unexpected token '" + tok2->str() + "'"); } } } // Keywords in global scope static const std::unordered_set nonGlobalKeywords{"break", "continue", "for", "goto", "if", "return", "switch", "while", "try", "catch"}; for (const Token *tok = tokens(); tok; tok = tok->next()) { if (tok->str() == "{") tok = tok->link(); else if (tok->isKeyword() && nonGlobalKeywords.count(tok->str()) && !Token::Match(tok->tokAt(-2), "operator %str%")) syntaxError(tok, "keyword '" + tok->str() + "' is not allowed in global scope"); } // case keyword must be inside switch for (const Token *tok = tokens(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "switch (")) { if (Token::simpleMatch(tok->linkAt(1), ") {")) { tok = tok->linkAt(1)->linkAt(1); continue; } const Token *switchToken = tok; tok = tok->linkAt(1); if (!tok) syntaxError(switchToken); // Look for the end of the switch statement, i.e. the first semi-colon or '}' for (; tok; tok = tok->next()) { if (tok->str() == "{") { tok = tok->link(); } if (Token::Match(tok, ";|}")) { // We're at the end of the switch block if (tok->str() == "}" && tok->strAt(-1) == ":") // Invalid case syntaxError(switchToken); break; } } if (!tok) break; } else if (tok->str() == "(") { tok = tok->link(); } else if (tok->str() == "case") { syntaxError(tok); } } for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!Token::simpleMatch(tok, "for (")) // find for loops continue; // count number of semicolons int semicolons = 0; const Token* const startTok = tok; tok = tok->next()->link()->previous(); // find ")" of the for-loop // walk backwards until we find the beginning (startTok) of the for() again for (; tok != startTok; tok = tok->previous()) { if (tok->str() == ";") { // do the counting semicolons++; } else if (tok->str() == ")") { // skip pairs of ( ) tok = tok->link(); } } // if we have an invalid number of semicolons inside for( ), assume syntax error if (semicolons > 2) syntaxError(tok); if (semicolons == 1 && !(isCPP() && mSettings->standards.cpp >= Standards::CPP20)) syntaxError(tok); } // Operators without operands.. const Token *templateEndToken = nullptr; for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!templateEndToken) { if (tok->str() == "<" && isCPP()) templateEndToken = tok->findClosingBracket(); } else { if (templateEndToken == tok) templateEndToken = nullptr; if (Token::Match(tok, "> %cop%")) continue; } // skip C++ attributes [[...]] if (isCPP11 && (isCPPAttribute(tok) || isAlignAttribute(tok))) { tok = skipCPPOrAlignAttribute(tok); continue; } { bool match1 = Token::Match(tok, "%or%|%oror%|==|!=|+|-|/|!|>=|<=|~|^|++|--|::|sizeof"); bool match2 = Token::Match(tok->next(), "{|if|else|while|do|for|return|switch|break"); if (isCPP()) { match1 = match1 || Token::Match(tok, "::|throw|decltype|typeof"); match2 = match2 || Token::Match(tok->next(), "try|catch|namespace"); } if (match1 && match2) syntaxError(tok); } if (Token::Match(tok, "%or%|%oror%|~|^|!|%comp%|+|-|/|%")) { std::string code; if (Token::Match(tok->next(), ")|]|}")) code = tok->str() + tok->next()->str(); if (Token::simpleMatch(tok->next(), "( )")) code = tok->str() + "()"; if (!code.empty()) { if (isC() || (tok->str() != ">" && !Token::simpleMatch(tok->previous(), "operator"))) syntaxError(tok, code); } } if (Token::Match(tok, "%num%|%bool%|%char%|%str% %num%|%bool%|%char%|%str%") && !Token::Match(tok, "%str% %str%")) syntaxError(tok); if (Token::Match(tok, "%assign% typename|class %assign%")) syntaxError(tok); if (Token::Match(tok, "%cop%|=|,|[ %or%|%oror%|/|%")) syntaxError(tok); if (Token::Match(tok, ";|(|[ %comp%")) syntaxError(tok); if (Token::Match(tok, "%cop%|= ]") && !(isCPP() && Token::Match(tok->previous(), "[|,|%num% &|=|> ]"))) syntaxError(tok); if (Token::Match(tok, "[+-] [;,)]}]") && !(isCPP() && Token::Match(tok->previous(), "operator [+-] ;"))) syntaxError(tok); if (Token::simpleMatch(tok, ",") && !Token::Match(tok->tokAt(-2), "[ = , &|%name%")) { if (Token::Match(tok->previous(), "(|[|{|<|%assign%|%or%|%oror%|==|!=|+|-|/|!|>=|<=|~|^|::|sizeof")) syntaxError(tok); if (isCPP() && Token::Match(tok->previous(), "throw|decltype|typeof")) syntaxError(tok); if (Token::Match(tok->next(), ")|]|>|%assign%|%or%|%oror%|==|!=|/|>=|<=|&&")) syntaxError(tok); } if (Token::simpleMatch(tok, ".") && !Token::simpleMatch(tok->previous(), ".") && !Token::simpleMatch(tok->next(), ".") && !Token::Match(tok->previous(), "{|, . %name% =|.|[|{") && !Token::Match(tok->previous(), ", . %name%")) { if (!Token::Match(tok->previous(), "%name%|)|]|>|}")) syntaxError(tok, tok->strAt(-1) + " " + tok->str() + " " + tok->strAt(1)); if (!Token::Match(tok->next(), "%name%|*|~")) syntaxError(tok, tok->strAt(-1) + " " + tok->str() + " " + tok->strAt(1)); } if (Token::Match(tok, "[!|+-/%^~] )|]")) syntaxError(tok); if (Token::Match(tok, "==|!=|<=|>= %comp%") && tok->strAt(-1) != "operator") syntaxError(tok, tok->str() + " " + tok->strAt(1)); } // ternary operator without : if (const Token *ternaryOp = findUnmatchedTernaryOp(tokens(), nullptr)) syntaxError(ternaryOp); // Code must not start with an arithmetical operand if (Token::Match(list.front(), "%cop%")) syntaxError(list.front()); // Code must end with } ; ) NAME if (!Token::Match(list.back(), "%name%|;|}|)")) syntaxError(list.back()); if (list.back()->str() == ")" && !Token::Match(list.back()->link()->previous(), "%name%|> (")) syntaxError(list.back()); for (const Token *end = list.back(); end && end->isName(); end = end->previous()) { if (Token::Match(end, "void|char|short|int|long|float|double|const|volatile|static|inline|struct|class|enum|union|template|sizeof|case|break|continue|typedef")) syntaxError(list.back()); } if ((list.back()->str()==")" || list.back()->str()=="}") && list.back()->previous() && list.back()->previous()->isControlFlowKeyword()) syntaxError(list.back()->previous()); // Garbage templates.. if (isCPP()) { for (const Token *tok = tokens(); tok; tok = tok->next()) { if (!Token::simpleMatch(tok, "template <")) continue; if (tok->previous() && !Token::Match(tok->previous(), ":|;|{|}|)|>|\"C++\"")) { if (tok->previous()->isUpperCaseName()) unknownMacroError(tok->previous()); else syntaxError(tok); } const Token * const tok1 = tok; tok = tok->next()->findClosingBracket(); if (!tok) syntaxError(tok1); if (!Token::Match(tok, ">|>> ::|...| %name%") && !Token::Match(tok, ">|>> [ [ %name%") && !Token::Match(tok, "> >|*")) syntaxError(tok->next() ? tok->next() : tok1); } } // Objective C/C++ for (const Token *tok = tokens(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] [ %name% %name% ] ;")) syntaxError(tok->next()); } } bool Tokenizer::isGarbageExpr(const Token *start, const Token *end, bool allowSemicolon) { for (const Token *tok = start; tok != end; tok = tok->next()) { if (tok->isControlFlowKeyword()) return true; if (!allowSemicolon && tok->str() == ";") return true; if (tok->str() == "{") tok = tok->link(); } return false; } std::string Tokenizer::simplifyString(const std::string &source) { std::string str = source; for (std::string::size_type i = 0; i + 1U < str.size(); ++i) { if (str[i] != '\\') continue; int c = 'a'; // char int sz = 0; // size of stringdata if (str[i+1] == 'x') { sz = 2; while (sz < 4 && std::isxdigit((unsigned char)str[i+sz])) sz++; if (sz > 2) { std::istringstream istr(str.substr(i+2, sz-2)); istr >> std::hex >> c; } } else if (MathLib::isOctalDigit(str[i+1])) { sz = 2; while (sz < 4 && MathLib::isOctalDigit(str[i+sz])) sz++; std::istringstream istr(str.substr(i+1, sz-1)); istr >> std::oct >> c; str = str.substr(0,i) + (char)c + str.substr(i+sz); continue; } if (sz <= 2) i++; else if (i+sz < str.size()) str.replace(i, sz, std::string(1U, (char)c)); else str.replace(i, str.size() - i - 1U, "a"); } return str; } void Tokenizer::simplifyWhile0() { for (Token *tok = list.front(); tok; tok = tok->next()) { // while (0) const bool while0(Token::Match(tok->previous(), "[{};] while ( 0|false )")); // for (0) - not banal, ticket #3140 const bool for0((Token::Match(tok->previous(), "[{};] for ( %name% = %num% ; %name% < %num% ;") && tok->strAt(2) == tok->strAt(6) && tok->strAt(4) == tok->strAt(8)) || (Token::Match(tok->previous(), "[{};] for ( %type% %name% = %num% ; %name% < %num% ;") && tok->strAt(3) == tok->strAt(7) && tok->strAt(5) == tok->strAt(9))); if (!while0 && !for0) continue; if (while0 && tok->previous()->str() == "}") { // find "do" Token *tok2 = tok->previous()->link(); tok2 = tok2->previous(); if (tok2 && tok2->str() == "do") { const bool flowmatch = Token::findmatch(tok2, "continue|break", tok) != nullptr; // delete "do ({)" tok2->deleteThis(); if (!flowmatch) tok2->deleteThis(); // delete "(}) while ( 0 ) (;)" tok = tok->previous(); tok->deleteNext(4); // while ( 0 ) if (tok->next() && tok->next()->str() == ";") tok->deleteNext(); // ; if (!flowmatch) tok->deleteThis(); // } continue; } } // remove "while (0) { .. }" if (Token::simpleMatch(tok->next()->link(), ") {")) { Token *end = tok->next()->link(), *old_prev = tok->previous(); end = end->next()->link(); if (Token::Match(tok, "for ( %name% =")) old_prev = end->link(); eraseDeadCode(old_prev, end->next()); if (old_prev && old_prev->next()) tok = old_prev->next(); else break; } } } void Tokenizer::simplifyFunctionTryCatch() { if (!isCPP()) return; for (Token * tok = list.front(); tok; tok = tok->next()) { if (!Token::simpleMatch(tok, "try {")) continue; if (!isFunctionHead(tok->previous(), "try")) continue; // find the end of the last catch block Token * const tryEndToken = tok->linkAt(1); Token * endToken = tryEndToken; while (Token::simpleMatch(endToken, "} catch (")) { endToken = endToken->linkAt(2)->next(); if (!endToken) break; if (endToken->str() != "{") { endToken = nullptr; break; } endToken = endToken->link(); } if (!endToken || endToken == tryEndToken) continue; tok->previous()->insertToken("{"); endToken->insertToken("}"); Token::createMutualLinks(tok->previous(), endToken->next()); } } void Tokenizer::simplifyErrNoInWhile() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "errno") continue; Token *endpar = nullptr; if (Token::Match(tok->previous(), "&& errno == EINTR ) { ;| }")) endpar = tok->tokAt(3); else if (Token::Match(tok->tokAt(-2), "&& ( errno == EINTR ) ) { ;| }")) endpar = tok->tokAt(4); else continue; if (Token::simpleMatch(endpar->link()->previous(), "while (")) { Token *tok1 = tok->previous(); if (tok1->str() == "(") tok1 = tok1->previous(); // erase "&& errno == EINTR" tok1 = tok1->previous(); Token::eraseTokens(tok1, endpar); // tok is invalid.. move to endpar tok = endpar; } } } void Tokenizer::simplifyFuncInWhile() { int count = 0; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!Token::Match(tok, "while ( %name% ( %name% ) ) {")) continue; Token *func = tok->tokAt(2); const Token * const var = tok->tokAt(4); Token * const end = tok->next()->link()->next()->link(); const int varid = ++mVarId; // Create new variable const std::string varname("cppcheck:r" + MathLib::toString(++count)); tok->str("int"); tok->next()->insertToken(varname); tok->tokAt(2)->varId(varid); tok->insertToken("while"); tok->insertToken(";"); tok->insertToken(")"); tok->insertToken(var->str()); tok->next()->varId(var->varId()); tok->insertToken("("); tok->insertToken(func->str()); tok->insertToken("="); tok->insertToken(varname); tok->next()->varId(varid); Token::createMutualLinks(tok->tokAt(4), tok->tokAt(6)); end->previous()->insertToken(varname); end->previous()->varId(varid); end->previous()->insertToken("="); Token::move(func, func->tokAt(3), end->previous()); end->previous()->insertToken(";"); tok = end; } } void Tokenizer::simplifyStructDecl() { const bool cpp = isCPP(); // A counter that is used when giving unique names for anonymous structs. int count = 0; // Skip simplification of unions in class definition std::stack skip; // true = in function, false = not in function skip.push(false); // Add names for anonymous structs for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName()) continue; // check for anonymous struct/union if (Token::Match(tok, "struct|union {")) { if (Token::Match(tok->next()->link(), "} const| *|&| const| %type% ,|;|[|(|{|=")) { tok->insertToken("Anonymous" + MathLib::toString(count++)); } } // check for derived anonymous class/struct else if (cpp && Token::Match(tok, "class|struct :")) { const Token *tok1 = Token::findsimplematch(tok, "{"); if (tok1 && Token::Match(tok1->link(), "} const| *|&| const| %type% ,|;|[|(|{")) { tok->insertToken("Anonymous" + MathLib::toString(count++)); } } // check for anonymous enum else if ((Token::simpleMatch(tok, "enum {") && !Token::Match(tok->tokAt(-3), "using %name% =") && Token::Match(tok->next()->link(), "} (| %type%| )| ,|;|[|(|{")) || (Token::Match(tok, "enum : %type% {") && Token::Match(tok->linkAt(3), "} (| %type%| )| ,|;|[|(|{"))) { Token *start = tok->strAt(1) == ":" ? tok->linkAt(3) : tok->linkAt(1); if (start && Token::Match(start->next(), "( %type% )")) { start->next()->link()->deleteThis(); start->next()->deleteThis(); } tok->insertToken("Anonymous" + MathLib::toString(count++)); } } for (Token *tok = list.front(); tok; tok = tok->next()) { // check for start of scope and determine if it is in a function if (tok->str() == "{") skip.push(Token::Match(tok->previous(), "const|)")); // end of scope else if (tok->str() == "}" && !skip.empty()) skip.pop(); // check for named struct/union else if (Token::Match(tok, "class|struct|union|enum %type% :|{")) { Token *start = tok; while (Token::Match(start->previous(), "%type%")) start = start->previous(); const Token * const type = tok->next(); Token *next = tok->tokAt(2); while (next && next->str() != "{") next = next->next(); if (!next) continue; skip.push(false); tok = next->link(); if (!tok) break; // see #4869 segmentation fault in Tokenizer::simplifyStructDecl (invalid code) Token *restart = next; // check for named type if (Token::Match(tok->next(), "const| *|&| const| (| %type% )| ,|;|[|=|(|{")) { tok->insertToken(";"); tok = tok->next(); while (!Token::Match(start, "struct|class|union|enum")) { tok->insertToken(start->str()); tok = tok->next(); start->deleteThis(); } if (!tok) break; // see #4869 segmentation fault in Tokenizer::simplifyStructDecl (invalid code) tok->insertToken(type->str()); if (start->str() != "class") { tok->insertToken(start->str()); tok = tok->next(); } tok = tok->tokAt(2); if (Token::Match(tok, "( %type% )")) { tok->link()->deleteThis(); tok->deleteThis(); } // check for initialization if (tok && (tok->next()->str() == "(" || tok->next()->str() == "{")) { tok->insertToken("="); tok = tok->next(); if (start->str() == "enum") { if (tok->next()->str() == "{") { tok->next()->str("("); tok->linkAt(1)->str(")"); } } } } tok = restart; } // check for anonymous struct/union else if (Token::Match(tok, "struct|union {")) { const bool inFunction = skip.top(); skip.push(false); Token *tok1 = tok; Token *restart = tok->next(); tok = tok->next()->link(); // unnamed anonymous struct/union so possibly remove it if (tok && tok->next() && tok->next()->str() == ";") { if (inFunction && tok1->str() == "union") { // Try to create references in the union.. Token *tok2 = tok1->tokAt(2); while (tok2) { if (Token::Match(tok2, "%type% %name% ;")) tok2 = tok2->tokAt(3); else break; } if (!Token::simpleMatch(tok2, "} ;")) continue; Token *vartok = nullptr; tok2 = tok1->tokAt(2); while (Token::Match(tok2, "%type% %name% ;")) { if (!vartok) { vartok = tok2->next(); tok2 = tok2->tokAt(3); } else { tok2->insertToken("&"); tok2 = tok2->tokAt(2); tok2->insertToken(vartok->str()); tok2->next()->varId(vartok->varId()); tok2->insertToken("="); tok2 = tok2->tokAt(4); } } } // don't remove unnamed anonymous unions from a class, struct or union if (!(!inFunction && tok1->str() == "union") && !Token::Match(tok1->tokAt(-3), "using %name% =")) { skip.pop(); tok1->deleteThis(); if (tok1->next() == tok) { tok1->deleteThis(); tok = tok1; } else tok1->deleteThis(); restart = tok1->previous(); tok->deleteThis(); if (tok->next()) tok->deleteThis(); } } if (!restart) { simplifyStructDecl(); return; } else if (!restart->next()) return; tok = restart; } } } void Tokenizer::simplifyCallingConvention() { const bool windows = mSettings->isWindowsPlatform(); for (Token *tok = list.front(); tok; tok = tok->next()) { while (Token::Match(tok, "__cdecl|__stdcall|__fastcall|__thiscall|__clrcall|__syscall|__pascal|__fortran|__far|__near") || (windows && Token::Match(tok, "WINAPI|APIENTRY|CALLBACK"))) { tok->deleteThis(); } } } void Tokenizer::simplifyDeclspec() { for (Token *tok = list.front(); tok; tok = tok->next()) { while (Token::Match(tok, "__declspec|_declspec (") && tok->next()->link() && tok->next()->link()->next()) { if (Token::Match(tok->tokAt(2), "noreturn|nothrow")) { Token *tok1 = tok->next()->link()->next(); while (tok1 && !Token::Match(tok1, "%name%")) { tok1 = tok1->next(); } if (tok1) { if (tok->strAt(2) == "noreturn") tok1->isAttributeNoreturn(true); else tok1->isAttributeNothrow(true); } } else if (tok->strAt(2) == "property") tok->next()->link()->insertToken("__property"); Token::eraseTokens(tok, tok->next()->link()->next()); tok->deleteThis(); } } } void Tokenizer::simplifyAttribute() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%type% (") && !mSettings->library.isNotLibraryFunction(tok)) { if (mSettings->library.isFunctionConst(tok->str(), true)) tok->isAttributePure(true); if (mSettings->library.isFunctionConst(tok->str(), false)) tok->isAttributeConst(true); } while (Token::Match(tok, "__attribute__|__attribute (")) { Token *after = tok; while (Token::Match(after, "__attribute__|__attribute (")) after = after->linkAt(1)->next(); if (!after) syntaxError(tok); Token *functok = nullptr; if (Token::Match(after, "%name%|*")) { Token *ftok = after; while (Token::Match(ftok, "%name%|::|<|* !!(")) { if (ftok->str() == "<") { ftok = ftok->findClosingBracket(); if (!ftok) break; } ftok = ftok->next(); } if (Token::Match(ftok, "%name% (")) functok = ftok; } else if (Token::Match(after, "[;{=:]")) { Token *prev = tok->previous(); while (Token::Match(prev, "%name%")) prev = prev->previous(); if (Token::simpleMatch(prev, ")") && Token::Match(prev->link()->previous(), "%name% (")) functok = prev->link()->previous(); else if ((!prev || Token::Match(prev, "[;{}*]")) && Token::Match(tok->previous(), "%name%")) functok = tok->previous(); } for (Token *attr = tok->tokAt(2); attr->str() != ")"; attr = attr->next()) { if (Token::Match(attr, "%name% (")) attr = attr->linkAt(1); if (Token::Match(attr, "[(,] constructor|__constructor__ [,()]")) { if (!functok) syntaxError(tok); functok->isAttributeConstructor(true); } else if (Token::Match(attr, "[(,] destructor|__destructor__ [,()]")) { if (!functok) syntaxError(tok); functok->isAttributeDestructor(true); } else if (Token::Match(attr, "[(,] unused|__unused__|used|__used__ [,)]")) { Token *vartok = nullptr; // check if after variable name if (Token::Match(after, ";|=")) { if (Token::Match(tok->previous(), "%type%")) vartok = tok->previous(); } // check if before variable name else if (Token::Match(after, "%type%")) vartok = after; if (vartok) { const std::string &attribute(attr->next()->str()); if (attribute.find("unused") != std::string::npos) vartok->isAttributeUnused(true); else vartok->isAttributeUsed(true); } } else if (Token::Match(attr, "[(,] pure|__pure__|const|__const__|noreturn|__noreturn__|nothrow|__nothrow__|warn_unused_result [,)]")) { if (!functok) syntaxError(tok); const std::string &attribute(attr->next()->str()); if (attribute.find("pure") != std::string::npos) functok->isAttributePure(true); else if (attribute.find("const") != std::string::npos) functok->isAttributeConst(true); else if (attribute.find("noreturn") != std::string::npos) functok->isAttributeNoreturn(true); else if (attribute.find("nothrow") != std::string::npos) functok->isAttributeNothrow(true); else if (attribute.find("warn_unused_result") != std::string::npos) functok->isAttributeNodiscard(true); } else if (Token::Match(attr, "[(,] packed [,)]") && Token::simpleMatch(tok->previous(), "}")) tok->previous()->isAttributePacked(true); } Token::eraseTokens(tok, tok->linkAt(1)->next()); tok->deleteThis(); } } } void Tokenizer::simplifyCppcheckAttribute() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "(") continue; if (!tok->previous()) continue; const std::string &attr = tok->previous()->str(); if (attr.compare(0, 11, "__cppcheck_") != 0) // TODO: starts_with("__cppcheck_") continue; if (attr.compare(attr.size()-2, 2, "__") != 0) // TODO: ends_with("__") continue; Token *vartok = tok->link(); while (Token::Match(vartok->next(), "%name%|*|&|::")) { vartok = vartok->next(); if (Token::Match(vartok, "%name% (") && vartok->str().compare(0,11,"__cppcheck_") == 0) vartok = vartok->linkAt(1); } if (vartok->isName()) { if (Token::Match(tok->previous(), "__cppcheck_low__ ( %num% )")) vartok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::LOW, MathLib::toLongNumber(tok->next()->str())); else if (Token::Match(tok->previous(), "__cppcheck_high__ ( %num% )")) vartok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::HIGH, MathLib::toLongNumber(tok->next()->str())); } // Delete cppcheck attribute.. if (tok->tokAt(-2)) { tok = tok->tokAt(-2); Token::eraseTokens(tok, tok->linkAt(2)->next()); } else { tok = tok->previous(); Token::eraseTokens(tok, tok->linkAt(1)->next()); tok->str(";"); } } } void Tokenizer::simplifyCPPAttribute() { if (mSettings->standards.cpp < Standards::CPP11 || isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!isCPPAttribute(tok) && !isAlignAttribute(tok)) { continue; } if (isCPPAttribute(tok)) { if (Token::findsimplematch(tok->tokAt(2), "noreturn", tok->link())) { const Token * head = skipCPPOrAlignAttribute(tok); while (isCPPAttribute(head) || isAlignAttribute(head)) head = skipCPPOrAlignAttribute(head); head = head->next(); while (Token::Match(head, "%name%|::|*|&|<|>|,")) // skip return type head = head->next(); if (head && head->str() == "(" && isFunctionHead(head, "{|;")) { head->previous()->isAttributeNoreturn(true); } } else if (Token::findsimplematch(tok->tokAt(2), "nodiscard", tok->link())) { const Token * head = skipCPPOrAlignAttribute(tok); while (isCPPAttribute(head) || isAlignAttribute(head)) head = skipCPPOrAlignAttribute(head); head = head->next(); while (Token::Match(head, "%name%|::|*|&|<|>|,")) head = head->next(); if (head && head->str() == "(" && isFunctionHead(head, "{|;")) { head->previous()->isAttributeNodiscard(true); } } else if (Token::findsimplematch(tok->tokAt(2), "maybe_unused", tok->link())) { const Token* head = skipCPPOrAlignAttribute(tok); while (isCPPAttribute(head) || isAlignAttribute(head)) head = skipCPPOrAlignAttribute(head); head->next()->isAttributeMaybeUnused(true); } else if (Token::Match(tok->previous(), ") [ [ expects|ensures|assert default|audit|axiom| : %name% <|<=|>|>= %num% ] ]")) { const Token *vartok = tok->tokAt(4); if (vartok->str() == ":") vartok = vartok->next(); Token *argtok = tok->tokAt(-2); while (argtok && argtok->str() != "(") { if (argtok->str() == vartok->str()) break; if (argtok->str() == ")") argtok = argtok->link(); argtok = argtok->previous(); } if (argtok && argtok->str() == vartok->str()) { if (vartok->next()->str() == ">=") argtok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::LOW, MathLib::toLongNumber(vartok->strAt(2))); else if (vartok->next()->str() == ">") argtok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::LOW, MathLib::toLongNumber(vartok->strAt(2))+1); else if (vartok->next()->str() == "<=") argtok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::HIGH, MathLib::toLongNumber(vartok->strAt(2))); else if (vartok->next()->str() == "<") argtok->setCppcheckAttribute(TokenImpl::CppcheckAttributes::Type::HIGH, MathLib::toLongNumber(vartok->strAt(2))-1); } } } else { if (Token::simpleMatch(tok, "alignas (")) { // alignment requirements could be checked here } } Token::eraseTokens(tok, skipCPPOrAlignAttribute(tok)->next()); // fix iterator after removing if (tok->previous()) { tok = tok->previous(); tok->next()->deleteThis(); } else { tok->deleteThis(); tok = list.front(); } } } void Tokenizer::removeAlignas() { if (!isCPP() || mSettings->standards.cpp < Standards::CPP11) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] alignas (") && Token::Match(tok->linkAt(2), ") %name%")) Token::eraseTokens(tok, tok->linkAt(2)->next()); } } void Tokenizer::simplifySpaceshipOperator() { if (isCPP() && mSettings->standards.cpp >= Standards::CPP20) { for (Token *tok = list.front(); tok && tok->next(); tok = tok->next()) { if (Token::simpleMatch(tok, "<= >")) { tok->str("<=>"); tok->deleteNext(); } } } } static const std::unordered_set keywords = { "inline" , "_inline" , "__inline" , "__forceinline" , "register" , "__restrict" , "__restrict__" , "__thread" }; // Remove "inline", "register", "restrict", "override", "static" and "constexpr" // "restrict" keyword // - New to 1999 ANSI/ISO C standard // - Not in C++ standard yet void Tokenizer::simplifyKeyword() { // FIXME: There is a risk that "keywords" are removed by mistake. This // code should be fixed so it doesn't remove variables etc. Nonstandard // keywords should be defined with a library instead. For instance the // linux kernel code at least uses "_inline" as struct member name at some // places. const bool c99 = isC() && mSettings->standards.c >= Standards::C99; const bool cpp11 = isCPP() && mSettings->standards.cpp >= Standards::CPP11; for (Token *tok = list.front(); tok; tok = tok->next()) { if (keywords.find(tok->str()) != keywords.end()) { // Don't remove struct members if (!Token::simpleMatch(tok->previous(), ".")) { if (tok->str().find("inline") != std::string::npos && Token::Match(tok->next(), "%name%")) tok->next()->isInline(true); tok->deleteThis(); // Simplify.. } } if (isC() || mSettings->standards.cpp == Standards::CPP03) { if (tok->str() == "auto") tok->deleteThis(); } // simplify static keyword: // void foo( int [ static 5 ] ); ==> void foo( int [ 5 ] ); if (Token::Match(tok, "[ static %num%")) tok->deleteNext(); if (c99) { while (tok->str() == "restrict") tok->deleteThis(); if (mSettings->standards.c >= Standards::C11) { while (tok->str() == "_Atomic") tok->deleteThis(); } } else if (cpp11) { // final: // 1) struct name final { }; <- struct is final if (Token::Match(tok->previous(), "struct|class|union %type% final [:{]")) { tok->deleteNext(); } // noexcept -> noexcept(true) // 2) void f() noexcept; -> void f() noexcept(true); else if (Token::Match(tok, ") noexcept :|{|;|const|override|final")) { // Insertion is done in inverse order // The brackets are linked together accordingly afterwards Token * tokNoExcept = tok->next(); tokNoExcept->insertToken(")"); Token * braceEnd = tokNoExcept->next(); tokNoExcept->insertToken("true"); tokNoExcept->insertToken("("); Token * braceStart = tokNoExcept->next(); tok = tok->tokAt(3); Token::createMutualLinks(braceStart, braceEnd); } // 3) thread_local -> static // on single thread thread_local has the effect of static else if (tok->str() == "thread_local") { tok->originalName(tok->str()); tok->str("static"); } } } } void Tokenizer::simplifyAssignmentInFunctionCall() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "(") tok = tok->link(); // Find 'foo(var='. Exclude 'assert(var=' to allow tests to check that assert(...) does not contain side-effects else if (Token::Match(tok, "[;{}] %name% ( %name% =") && Token::simpleMatch(tok->linkAt(2), ") ;") && !Token::Match(tok->next(), "assert|while")) { const std::string& funcname(tok->next()->str()); Token* const vartok = tok->tokAt(3); // Goto ',' or ')'.. for (Token *tok2 = vartok->tokAt(2); tok2; tok2 = tok2->next()) { if (tok2->link() && Token::Match(tok2, "(|[|{")) tok2 = tok2->link(); else if (tok2->str() == ";") break; else if (Token::Match(tok2, ")|,")) { tok2 = tok2->previous(); tok2->insertToken(vartok->str()); tok2->next()->varId(vartok->varId()); tok2->insertToken("("); Token::createMutualLinks(tok2->next(), tok->linkAt(2)); tok2->insertToken(funcname); tok2->insertToken(";"); Token::eraseTokens(tok, vartok); break; } } } } } void Tokenizer::simplifyAssignmentBlock() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "[;{}] %name% = ( {")) { const std::string &varname = tok->next()->str(); // goto the "} )" int indentlevel = 0; Token *tok2 = tok; while (nullptr != (tok2 = tok2->next())) { if (Token::Match(tok2, "(|{")) ++indentlevel; else if (Token::Match(tok2, ")|}")) { if (indentlevel <= 2) break; --indentlevel; } else if (indentlevel == 2 && tok2->str() == varname && Token::Match(tok2->previous(), "%type%|*")) // declaring variable in inner scope with same name as lhs variable break; } if (indentlevel == 2 && Token::simpleMatch(tok2, "} )")) { tok2 = tok2->tokAt(-3); if (Token::Match(tok2, "[;{}] %num%|%name% ;")) { tok2->insertToken("="); tok2->insertToken(tok->next()->str()); tok2->next()->varId(tok->next()->varId()); tok->deleteNext(3); tok2->tokAt(5)->deleteNext(); } } } } } // Remove __asm.. void Tokenizer::simplifyAsm() { std::string instruction; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "__asm|_asm|asm {") && tok->next()->link()->next()) { instruction = tok->tokAt(2)->stringifyList(tok->next()->link()); Token::eraseTokens(tok, tok->next()->link()->next()); } else if (Token::Match(tok, "asm|__asm|__asm__ volatile|__volatile|__volatile__| (")) { // Goto "(" Token *partok = tok->next(); if (partok->str() != "(") partok = partok->next(); instruction = partok->next()->stringifyList(partok->link()); Token::eraseTokens(tok, partok->link()->next()); } else if (Token::Match(tok, "_asm|__asm")) { Token *endasm = tok->next(); const Token *firstSemiColon = nullptr; int comment = 0; while (Token::Match(endasm, "%num%|%name%|,|:|;") || (endasm && endasm->linenr() == comment)) { if (Token::Match(endasm, "_asm|__asm|__endasm")) break; if (endasm->str() == ";") { comment = endasm->linenr(); if (!firstSemiColon) firstSemiColon = endasm; } endasm = endasm->next(); } if (Token::simpleMatch(endasm, "__endasm")) { instruction = tok->next()->stringifyList(endasm); Token::eraseTokens(tok, endasm->next()); if (!Token::simpleMatch(tok->next(), ";")) tok->insertToken(";"); } else if (firstSemiColon) { instruction = tok->next()->stringifyList(firstSemiColon); Token::eraseTokens(tok, firstSemiColon); } else if (!endasm) { instruction = tok->next()->stringifyList(endasm); Token::eraseTokens(tok, endasm); tok->insertToken(";"); } else continue; } else continue; // insert "asm ( "instruction" )" tok->str("asm"); if (tok->strAt(1) != ";" && tok->strAt(1) != "{") tok->insertToken(";"); tok->insertToken(")"); tok->insertToken("\"" + instruction + "\""); tok->insertToken("("); tok = tok->next(); Token::createMutualLinks(tok, tok->tokAt(2)); //move the new tokens in the same line as ";" if available tok = tok->tokAt(2); if (tok->next() && tok->next()->str() == ";" && tok->next()->linenr() != tok->linenr()) { const int endposition = tok->next()->linenr(); tok = tok->tokAt(-3); for (int i = 0; i < 4; ++i) { tok = tok->next(); tok->linenr(endposition); } } } } void Tokenizer::simplifyAsm2() { // Block declarations: ^{} // A C extension used to create lambda like closures. // Put ^{} statements in asm() for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() != "^") continue; if (Token::simpleMatch(tok, "^ {") || (Token::simpleMatch(tok->linkAt(1), ") {") && tok->strAt(-1) != "operator")) { Token * start = tok; while (start && !Token::Match(start, "[,(;{}=]")) { if (start->link() && Token::Match(start, ")|]|>")) start = start->link(); start = start->previous(); } const Token *last = tok->next()->link(); if (Token::simpleMatch(last, ") {")) last = last->linkAt(1); last = last->next(); while (last && !Token::Match(last, "%cop%|,|;|{|}|)")) { if (Token::Match(last, "(|[")) last = last->link(); last = last->next(); } if (start && last) { std::string asmcode; while (start->next() != last) { asmcode += start->next()->str(); start->deleteNext(); } if (last->str() == "}") start->insertToken(";"); start->insertToken(")"); start->insertToken("\"" + asmcode + "\""); start->insertToken("("); start->insertToken("asm"); start->tokAt(2)->link(start->tokAt(4)); start->tokAt(4)->link(start->tokAt(2)); tok = start->tokAt(4); } } } } void Tokenizer::simplifyAt() { std::set var; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%name%|] @ %num%|%name%|(")) { const Token *end = tok->tokAt(2); if (end->isNumber()) end = end->next(); else if (end->str() == "(") { int par = 0; while ((end = end->next()) != nullptr) { if (end->str() == "(") par++; else if (end->str() == ")") { if (--par < 0) break; } } end = end ? end->next() : nullptr; } else if (var.find(end->str()) != var.end()) end = end->next(); else continue; if (Token::Match(end, ": %num% ;")) end = end->tokAt(2); if (end && end->str() == ";") { if (tok->isName()) var.insert(tok->str()); tok->isAtAddress(true); Token::eraseTokens(tok, end); } } // keywords in compiler from cosmic software for STM8 // TODO: Should use platform configuration. if (Token::Match(tok, "@ builtin|eeprom|far|inline|interrupt|near|noprd|nostack|nosvf|packed|stack|svlreg|tiny|vector")) { tok->str(tok->next()->str() + "@"); tok->deleteNext(); } } } // Simplify bitfields void Tokenizer::simplifyBitfields() { bool goback = false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (goback) { goback = false; tok = tok->previous(); } Token *last = nullptr; if (Token::simpleMatch(tok, "for (")) tok = tok->linkAt(1); if (!Token::Match(tok, ";|{|}|public:|protected:|private:")) continue; bool isEnum = false; if (tok->str() == "}") { const Token *type = tok->link()->previous(); while (type && type->isName()) { if (type->str() == "enum") { isEnum = true; break; } type = type->previous(); } } if (Token::Match(tok->next(), "const| %type% %name% :") && !Token::Match(tok->next(), "case|public|protected|private|class|struct") && !Token::simpleMatch(tok->tokAt(2), "default :")) { Token *tok1 = (tok->next()->str() == "const") ? tok->tokAt(3) : tok->tokAt(2); if (Token::Match(tok1, "%name% : %num% ;")) tok1->setBits(MathLib::toLongNumber(tok1->strAt(2))); if (tok1 && tok1->tokAt(2) && (Token::Match(tok1->tokAt(2), "%bool%|%num%") || !Token::Match(tok1->tokAt(2), "public|protected|private| %type% ::|<|,|{|;"))) { while (tok1->next() && !Token::Match(tok1->next(), "[;,)]{}]")) { if (Token::Match(tok1->next(), "[([]")) Token::eraseTokens(tok1, tok1->next()->link()); tok1->deleteNext(); } last = tok1->next(); } } else if (isEnum && Token::Match(tok, "} %name%| : %num% ;")) { if (tok->next()->str() == ":") { tok->deleteNext(2); tok->insertToken("Anonymous"); } else { tok->next()->deleteNext(2); } } else if (Token::Match(tok->next(), "const| %type% : %num%|%bool% ;") && tok->next()->str() != "default") { const int offset = (tok->next()->str() == "const") ? 1 : 0; if (!Token::Match(tok->tokAt(3 + offset), "[{};()]")) { tok->deleteNext(4 + offset); goback = true; } } if (last && last->str() == ",") { Token * tok1 = last; tok1->str(";"); const Token *const tok2 = tok->next(); tok1->insertToken(tok2->str()); tok1 = tok1->next(); tok1->isSigned(tok2->isSigned()); tok1->isUnsigned(tok2->isUnsigned()); tok1->isLong(tok2->isLong()); } } } // Types and objects in std namespace that are neither functions nor templates static const std::set stdTypes = { "string", "wstring", "u16string", "u32string", "iostream", "ostream", "ofstream", "ostringstream", "istream", "ifstream", "istringstream", "fstream", "stringstream", "wstringstream", "wistringstream", "wostringstream", "wstringbuf", "stringbuf", "streambuf", "ios", "filebuf", "ios_base", "exception", "bad_exception", "bad_alloc", "logic_error", "domain_error", "invalid_argument_", "length_error", "out_of_range", "runtime_error", "range_error", "overflow_error", "underflow_error", "locale", "cout", "cerr", "clog", "cin", "wcerr", "wcin", "wclog", "wcout", "endl", "ends", "flush", "boolalpha", "noboolalpha", "showbase", "noshowbase", "showpoint", "noshowpoint", "showpos", "noshowpos", "skipws", "noskipws", "unitbuf", "nounitbuf", "uppercase", "nouppercase", "dec", "hex", "oct", "fixed", "scientific", "internal", "left", "right", "fpos", "streamoff", "streampos", "streamsize" }; static const std::set stdTemplates = { "array", "basic_string", "bitset", "deque", "list", "map", "multimap", "priority_queue", "queue", "set", "multiset", "stack", "vector", "pair", "iterator", "iterator_traits", "unordered_map", "unordered_multimap", "unordered_set", "unordered_multiset", "tuple", "function" }; static const std::set stdFunctions = { "getline", "for_each", "find", "find_if", "find_end", "find_first_of", "adjacent_find", "count", "count_if", "mismatch", "equal", "search", "search_n", "copy", "copy_backward", "swap", "swap_ranges", "iter_swap", "transform", "replace", "replace_if", "replace_copy", "replace_copy_if", "fill", "fill_n", "generate", "generate_n", "remove", "remove_if", "remove_copy", "remove_copy_if", "unique", "unique_copy", "reverse", "reverse_copy", "rotate", "rotate_copy", "random_shuffle", "partition", "stable_partition", "sort", "stable_sort", "partial_sort", "partial_sort_copy", "nth_element", "lower_bound", "upper_bound", "equal_range", "binary_search", "merge", "inplace_merge", "includes", "set_union", "set_intersection", "set_difference", "set_symmetric_difference", "push_heap", "pop_heap", "make_heap", "sort_heap", "min", "max", "min_element", "max_element", "lexicographical_compare", "next_permutation", "prev_permutation", "advance", "back_inserter", "distance", "front_inserter", "inserter", "make_pair", "make_shared", "make_tuple" }; // Add std:: in front of std classes, when using namespace std; was given void Tokenizer::simplifyNamespaceStd() { if (!isCPP()) return; const bool isCPP11 = mSettings->standards.cpp == Standards::CPP11; std::set userFunctions; for (const Token* tok = Token::findsimplematch(list.front(), "using namespace std ;"); tok; tok = tok->next()) { bool insert = false; if (Token::Match(tok, "enum class|struct| %name%| :|{")) { // Don't replace within enum definitions skipEnumBody(&tok); } if (!Token::Match(tok->previous(), ".|::")) { if (Token::Match(tok, "%name% (")) { if (isFunctionHead(tok->next(), "{")) userFunctions.insert(tok->str()); else if (isFunctionHead(tok->next(), ";")) { const Token *start = tok; while (Token::Match(start->previous(), "%type%|*|&")) start = start->previous(); if (start != tok && start->isName() && (!start->previous() || Token::Match(start->previous(), "[;{}]"))) userFunctions.insert(tok->str()); } if (userFunctions.find(tok->str()) == userFunctions.end() && stdFunctions.find(tok->str()) != stdFunctions.end()) insert = true; } else if (Token::Match(tok, "%name% <") && stdTemplates.find(tok->str()) != stdTemplates.end()) insert = true; else if (tok->isName() && !tok->varId() && !Token::Match(tok->next(), "(|<") && stdTypes.find(tok->str()) != stdTypes.end()) insert = true; } if (insert) { tok->previous()->insertToken("std"); tok->previous()->linenr(tok->linenr()); // For stylistic reasons we put the std:: in the same line as the following token tok->previous()->fileIndex(tok->fileIndex()); tok->previous()->insertToken("::"); } else if (isCPP11 && Token::Match(tok, "!!:: tr1 ::")) tok->next()->str("std"); } for (Token* tok = list.front(); tok; tok = tok->next()) { if (isCPP11 && Token::simpleMatch(tok, "std :: tr1 ::")) Token::eraseTokens(tok, tok->tokAt(3)); else if (Token::simpleMatch(tok, "using namespace std ;")) { Token::eraseTokens(tok, tok->tokAt(4)); tok->deleteThis(); } } } void Tokenizer::simplifyMicrosoftMemoryFunctions() { // skip if not Windows if (!mSettings->isWindowsPlatform()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->strAt(1) != "(") continue; if (Token::Match(tok, "CopyMemory|RtlCopyMemory|RtlCopyBytes")) { tok->str("memcpy"); } else if (Token::Match(tok, "MoveMemory|RtlMoveMemory")) { tok->str("memmove"); } else if (Token::Match(tok, "FillMemory|RtlFillMemory|RtlFillBytes")) { // FillMemory(dst, len, val) -> memset(dst, val, len) tok->str("memset"); Token *tok1 = tok->tokAt(2); if (tok1) tok1 = tok1->nextArgument(); // Second argument if (tok1) { Token *tok2 = tok1->nextArgument(); // Third argument if (tok2) Token::move(tok1->previous(), tok2->tokAt(-2), tok->next()->link()->previous()); // Swap third with second argument } } else if (Token::Match(tok, "ZeroMemory|RtlZeroMemory|RtlZeroBytes|RtlSecureZeroMemory")) { // ZeroMemory(dst, len) -> memset(dst, 0, len) tok->str("memset"); Token *tok1 = tok->tokAt(2); if (tok1) tok1 = tok1->nextArgument(); // Second argument if (tok1) { tok1 = tok1->previous(); tok1->insertToken("0"); tok1 = tok1->next(); tok1->insertToken(","); } } else if (Token::simpleMatch(tok, "RtlCompareMemory")) { // RtlCompareMemory(src1, src2, len) -> memcmp(src1, src2, len) tok->str("memcmp"); // For the record, when memcmp returns 0, both strings are equal. // When RtlCompareMemory returns len, both strings are equal. // It might be needed to improve this replacement by something // like ((len - memcmp(src1, src2, len)) % (len + 1)) to // respect execution path (if required) } } } namespace { struct triplet { triplet(const char* m, const char* u) : mbcs(m), unicode(u) {} std::string mbcs, unicode; }; const std::map apis = { std::make_pair("_topen", triplet("open", "_wopen")), std::make_pair("_tsopen_s", triplet("_sopen_s", "_wsopen_s")), std::make_pair("_tfopen", triplet("fopen", "_wfopen")), std::make_pair("_tfopen_s", triplet("fopen_s", "_wfopen_s")), std::make_pair("_tfreopen", triplet("freopen", "_wfreopen")), std::make_pair("_tfreopen_s", triplet("freopen_s", "_wfreopen_s")), std::make_pair("_tcscat", triplet("strcat", "wcscat")), std::make_pair("_tcschr", triplet("strchr", "wcschr")), std::make_pair("_tcscmp", triplet("strcmp", "wcscmp")), std::make_pair("_tcsdup", triplet("strdup", "wcsdup")), std::make_pair("_tcscpy", triplet("strcpy", "wcscpy")), std::make_pair("_tcslen", triplet("strlen", "wcslen")), std::make_pair("_tcsncat", triplet("strncat", "wcsncat")), std::make_pair("_tcsncpy", triplet("strncpy", "wcsncpy")), std::make_pair("_tcsnlen", triplet("strnlen", "wcsnlen")), std::make_pair("_tcsrchr", triplet("strrchr", "wcsrchr")), std::make_pair("_tcsstr", triplet("strstr", "wcsstr")), std::make_pair("_tcstok", triplet("strtok", "wcstok")), std::make_pair("_ftprintf", triplet("fprintf", "fwprintf")), std::make_pair("_tprintf", triplet("printf", "wprintf")), std::make_pair("_stprintf", triplet("sprintf", "swprintf")), std::make_pair("_sntprintf", triplet("_snprintf", "_snwprintf")), std::make_pair("_ftscanf", triplet("fscanf", "fwscanf")), std::make_pair("_tscanf", triplet("scanf", "wscanf")), std::make_pair("_stscanf", triplet("sscanf", "swscanf")), std::make_pair("_ftprintf_s", triplet("fprintf_s", "fwprintf_s")), std::make_pair("_tprintf_s", triplet("printf_s", "wprintf_s")), std::make_pair("_stprintf_s", triplet("sprintf_s", "swprintf_s")), std::make_pair("_sntprintf_s", triplet("_snprintf_s", "_snwprintf_s")), std::make_pair("_ftscanf_s", triplet("fscanf_s", "fwscanf_s")), std::make_pair("_tscanf_s", triplet("scanf_s", "wscanf_s")), std::make_pair("_stscanf_s", triplet("sscanf_s", "swscanf_s")) }; } void Tokenizer::simplifyMicrosoftStringFunctions() { // skip if not Windows if (!mSettings->isWindowsPlatform()) return; const bool ansi = mSettings->platformType == Settings::Win32A; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->strAt(1) != "(") continue; const std::map::const_iterator match = apis.find(tok->str()); if (match!=apis.end()) { tok->str(ansi ? match->second.mbcs : match->second.unicode); tok->originalName(match->first); } else if (Token::Match(tok, "_T|_TEXT|TEXT ( %char%|%str% )")) { tok->deleteNext(); tok->deleteThis(); tok->deleteNext(); if (!ansi) { tok->isLong(true); if (tok->str()[0] != 'L') tok->str("L" + tok->str()); } while (Token::Match(tok->next(), "_T|_TEXT|TEXT ( %char%|%str% )")) { tok->next()->deleteNext(); tok->next()->deleteThis(); tok->next()->deleteNext(); tok->concatStr(tok->next()->str()); tok->deleteNext(); } } } } // Remove Borland code void Tokenizer::simplifyBorland() { // skip if not Windows if (!mSettings->isWindowsPlatform()) return; if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "( __closure * %name% )")) { tok->deleteNext(); } } // I think that these classes are always declared at the outer scope // I save some time by ignoring inner classes. for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "{" && !Token::Match(tok->tokAt(-2), "namespace %type%")) { tok = tok->link(); if (!tok) break; } else if (Token::Match(tok, "class %name% :|{")) { while (tok && tok->str() != "{" && tok->str() != ";") tok = tok->next(); if (!tok) break; if (tok->str() == ";") continue; const Token* end = tok->link()->next(); for (Token *tok2 = tok->next(); tok2 != end; tok2 = tok2->next()) { if (tok2->str() == "__property" && Token::Match(tok2->previous(), ";|{|}|protected:|public:|__published:")) { while (tok2->next() && !Token::Match(tok2->next(), "{|;")) tok2->deleteNext(); tok2->deleteThis(); if (tok2->str() == "{") { Token::eraseTokens(tok2, tok2->link()); tok2->deleteNext(); tok2->deleteThis(); // insert "; __property ;" tok2->previous()->insertToken(";"); tok2->previous()->insertToken("__property"); tok2->previous()->insertToken(";"); } } } } } } // Remove Qt signals and slots void Tokenizer::simplifyQtSignalsSlots() { if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { // check for emit which can be outside of class if (Token::Match(tok, "emit|Q_EMIT %name% (") && Token::simpleMatch(tok->linkAt(2), ") ;")) { tok->deleteThis(); } else if (!Token::Match(tok, "class %name% :|::|{")) continue; if (tok->previous() && tok->previous()->str() == "enum") { tok = tok->tokAt(2); continue; } // count { and } for tok2 int indentlevel = 0; for (Token *tok2 = tok; tok2; tok2 = tok2->next()) { if (tok2->str() == "{") { ++indentlevel; if (indentlevel == 1) tok = tok2; else tok2 = tok2->link(); } else if (tok2->str() == "}") { if (indentlevel<2) break; else --indentlevel; } else if (tok2->str() == ";" && indentlevel == 0) break; if (tok2->strAt(1) == "Q_OBJECT") tok2->deleteNext(); if (Token::Match(tok2->next(), "public|protected|private slots|Q_SLOTS :")) { tok2 = tok2->next(); tok2->str(tok2->str() + ":"); tok2->deleteNext(2); tok2 = tok2->previous(); } else if (Token::Match(tok2->next(), "signals|Q_SIGNALS :")) { tok2 = tok2->next(); tok2->str("protected:"); tok2->deleteNext(); } else if (Token::Match(tok2->next(), "emit|Q_EMIT %name% (") && Token::simpleMatch(tok2->linkAt(3), ") ;")) { tok2->deleteNext(); } } } } void Tokenizer::createSymbolDatabase() { if (!mSymbolDatabase) mSymbolDatabase = new SymbolDatabase(this, mSettings, mErrorLogger); mSymbolDatabase->validate(); } void Tokenizer::deleteSymbolDatabase() { delete mSymbolDatabase; mSymbolDatabase = nullptr; } bool Tokenizer::operatorEnd(const Token * tok) const { if (tok && tok->str() == ")") { if (isFunctionHead(tok, "{|;|?|:|[")) return true; tok = tok->next(); while (tok && !Token::Match(tok, "[=;{),]")) { if (Token::Match(tok, "const|volatile|override")) { tok = tok->next(); } else if (tok->str() == "noexcept") { tok = tok->next(); if (tok && tok->str() == "(") { tok = tok->link()->next(); } } else if (tok->str() == "throw" && tok->next() && tok->next()->str() == "(") { tok = tok->next()->link()->next(); } // unknown macros ") MACRO {" and ") MACRO(...) {" else if (tok->isUpperCaseName()) { tok = tok->next(); if (tok && tok->str() == "(") { tok = tok->link()->next(); } } else if (Token::Match(tok, "%op% !!(") || (Token::Match(tok, "%op% (") && !isFunctionHead(tok->next(), "{"))) break; else return false; } return true; } return false; } void Tokenizer::simplifyOperatorName() { if (isC()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "using|:: operator %op%|%name% ;")) { tok->next()->str("operator" + tok->strAt(2)); tok->next()->deleteNext(); continue; } if (tok->str() != "operator") continue; // operator op if (Token::Match(tok, "operator %op% (") && !operatorEnd(tok->linkAt(2))) { tok->str(tok->str() + tok->next()->str()); tok->deleteNext(); continue; } std::string op; Token *par = tok->next(); bool done = false; while (!done && par) { done = true; if (par->isName()) { op += par->str(); par = par->next(); // merge namespaces eg. 'operator std :: string () const {' if (Token::Match(par, ":: %name%|%op%|.")) { op += par->str(); par = par->next(); } done = false; } else if (Token::Match(par, ".|%op%|,")) { // check for operator in template if (par->str() == "," && !op.empty()) break; if (!(Token::Match(par, "<|>") && !op.empty())) { op += par->str(); par = par->next(); done = false; } } else if (Token::simpleMatch(par, "[ ]")) { op += "[]"; par = par->tokAt(2); done = false; } else if (Token::Match(par, "( *| )")) { // break out and simplify.. if (operatorEnd(par->next())) break; while (par->str() != ")") { op += par->str(); par = par->next(); } op += ")"; par = par->next(); if (Token::simpleMatch(par, "...")) { op.clear(); par = nullptr; break; } done = false; } else if (Token::Match(par, "\"\" %name% (|;|<")) { op += "\"\""; op += par->strAt(1); par = par->tokAt(2); done = true; } else if (par->str() == "::") { op += par->str(); par = par->next(); done = false; } else if (par->str() == ";" || par->str() == ")") { done = true; } else if (par->str() != "(") { syntaxError(par, "operator"); } } if (par && !op.empty()) { tok->str("operator" + op); Token::eraseTokens(tok, par); } if (!op.empty()) tok->isOperatorKeyword(true); } for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "%op% %str% %name%")) { std::string name = tok->strAt(2); Token * const str = tok->next(); str->deleteNext(); tok->insertToken("operator\"\"" + name); tok = tok->next(); tok->isOperatorKeyword(true); tok->insertToken("("); str->insertToken(")"); Token::createMutualLinks(tok->next(), str->next()); str->insertToken(MathLib::toString(Token::getStrLength(str))); str->insertToken(","); } } if (mSettings->debugwarnings) { const Token *tok = list.front(); while ((tok = Token::findsimplematch(tok, "operator")) != nullptr) { reportError(tok, Severity::debug, "debug", "simplifyOperatorName: found unsimplified operator name"); tok = tok->next(); } } } void Tokenizer::simplifyOverloadedOperators() { if (isC()) return; std::set classNames; std::set classVars; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName()) continue; if (Token::simpleMatch(tok, "this ) (") && Token::simpleMatch(tok->tokAt(-2), "( *")) { tok = tok->next(); tok->insertToken("operator()"); tok->insertToken("."); continue; } // Get classes that have operator() member if (Token::Match(tok, "class|struct %name% [:{]")) { int indent = 0; for (const Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) { if (tok2->str() == "}") break; else if (indent == 0 && tok2->str() == ";") break; else if (tok2->str() == "{") { if (indent == 0) ++indent; else tok2 = tok2->link(); } else if (indent == 1 && Token::simpleMatch(tok2, "operator() (") && isFunctionHead(tok2->next(), ";{")) { classNames.insert(tok->strAt(1)); break; } } } // Get variables that have operator() member if (Token::Match(tok, "%type% &| %var%") && classNames.find(tok->str()) != classNames.end()) { tok = tok->next(); while (!tok->isName()) tok = tok->next(); classVars.insert(tok->varId()); } // Simplify operator() calls if (Token::Match(tok, "%var% (") && classVars.find(tok->varId()) != classVars.end()) { // constructor init list.. if (Token::Match(tok->previous(), "[:,]")) { const Token *start = tok->previous(); while (Token::simpleMatch(start, ",")) { if (Token::simpleMatch(start->previous(), ")")) start = start->linkAt(-1); else break; if (Token::Match(start->previous(), "%name%")) start = start->tokAt(-2); else break; } const Token *after = tok->linkAt(1); while (Token::Match(after, ")|} , %name% (|{")) after = after->linkAt(3); // Do not simplify initlist if (Token::simpleMatch(start, ":") && Token::simpleMatch(after, ") {")) continue; } tok->insertToken("operator()"); tok->insertToken("."); } } } // remove unnecessary member qualification.. void Tokenizer::removeUnnecessaryQualification() { if (isC()) return; std::vector classInfo; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "class|struct|namespace %type% :|{") && (!tok->previous() || tok->previous()->str() != "enum")) { Space info; info.isNamespace = tok->str() == "namespace"; tok = tok->next(); info.className = tok->str(); tok = tok->next(); while (tok && tok->str() != "{") tok = tok->next(); if (!tok) return; info.bodyEnd = tok->link(); classInfo.push_back(info); } else if (!classInfo.empty()) { if (tok == classInfo.back().bodyEnd) classInfo.pop_back(); else if (tok->str() == classInfo.back().className && !classInfo.back().isNamespace && tok->previous()->str() != ":" && (Token::Match(tok, "%type% :: ~| %type% (") || Token::Match(tok, "%type% :: operator"))) { const Token *tok1 = tok->tokAt(3); if (tok->strAt(2) == "operator") { // check for operator () if (tok1->str() == "(") tok1 = tok1->next(); while (tok1 && tok1->str() != "(") { if (tok1->str() == ";") break; tok1 = tok1->next(); } if (!tok1 || tok1->str() != "(") continue; } else if (tok->strAt(2) == "~") tok1 = tok1->next(); if (!tok1 || !Token::Match(tok1->link(), ") const| {|;|:")) { continue; } const bool isConstructorOrDestructor = Token::Match(tok, "%type% :: ~| %type%") && (tok->strAt(2) == tok->str() || (tok->strAt(2) == "~" && tok->strAt(3) == tok->str())); if (!isConstructorOrDestructor) { bool isPrependedByType = Token::Match(tok->previous(), "%type%"); if (!isPrependedByType) { const Token* tok2 = tok->tokAt(-2); isPrependedByType = Token::Match(tok2, "%type% *|&"); } if (!isPrependedByType) { const Token* tok3 = tok->tokAt(-3); isPrependedByType = Token::Match(tok3, "%type% * *|&"); } if (!isPrependedByType) { // It's not a constructor declaration and it's not a function declaration so // this is a function call which can have all the qualifiers just fine - skip. continue; } } } } } } void Tokenizer::simplifyReturnStrncat() { for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::simpleMatch(tok, "return strncat (") && Token::simpleMatch(tok->linkAt(2), ") ;") && tok->strAt(3) != ")" && tok->strAt(3) != ",") { //first argument Token *tok2 = tok->tokAt(3); //check if there are at least three arguments for (int i = 0; i < 2; ++i) { tok2 = tok2->nextArgument(); if (!tok2) { tok = tok->linkAt(2)->next(); break; } } if (!tok2) continue; tok2 = tok2->nextArgument(); //we want only three arguments if (tok2) { tok = tok->linkAt(2)->next(); continue; } // Remove 'return' tok->deleteThis(); // Add 'return arg1 ;' after 'strncat(arg1, arg2, arg3);' tok = tok->next(); tok2 = tok->link()->next(); tok2->insertToken(";"); //the last token of the first argument before ',' const Token * const end = tok->next()->nextArgument()->tokAt(-2); //all the first argument is copied TokenList::copyTokens(tok2, tok->next(), end); tok2->insertToken("return"); } } } void Tokenizer::printUnknownTypes() const { if (!mSymbolDatabase) return; std::multimap unknowns; for (int i = 1; i <= mVarId; ++i) { const Variable *var = mSymbolDatabase->getVariableFromVarId(i); if (!var) continue; // is unknown type? if (var->type() || var->typeStartToken()->isStandardType()) continue; std::string name; const Token * nameTok; // single token type? if (var->typeStartToken() == var->typeEndToken()) { nameTok = var->typeStartToken(); name = nameTok->str(); } // complicated type else { const Token *tok = var->typeStartToken(); int level = 0; nameTok = tok; while (tok) { // skip pointer and reference part of type if (level == 0 && Token::Match(tok, "*|&")) break; name += tok->str(); if (Token::Match(tok, "struct|union|enum")) name += " "; // pointers and references are OK in template else if (tok->str() == "<") ++level; else if (tok->str() == ">") --level; if (tok == var->typeEndToken()) break; tok = tok->next(); } } unknowns.insert(std::pair(name, nameTok)); } if (!unknowns.empty()) { std::string last; int count = 0; for (std::multimap::const_iterator it = unknowns.begin(); it != unknowns.end(); ++it) { // skip types is std namespace because they are not interesting if (it->first.find("std::") != 0) { if (it->first != last) { last = it->first; count = 1; reportError(it->second, Severity::debug, "debug", "Unknown type \'" + it->first + "\'."); } else { if (count < 3) // limit same type to 3 reportError(it->second, Severity::debug, "debug", "Unknown type \'" + it->first + "\'."); count++; } } } } } void Tokenizer::simplifyMathExpressions() { for (Token *tok = list.front(); tok; tok = tok->next()) { //simplify Pythagorean trigonometric identity: pow(sin(x),2)+pow(cos(x),2) = 1 // pow(cos(x),2)+pow(sin(x),2) = 1 // @todo: sin(x) * sin(x) + cos(x) * cos(x) = 1 // cos(x) * cos(x) + sin(x) * sin(x) = 1 //simplify Hyperbolic identity: pow(sinh(x),2)-pow(cosh(x),2) = -1 // pow(cosh(x),2)-pow(sinh(x),2) = -1 // @todo: sinh(x) * sinh(x) - cosh(x) * cosh(x) = -1 // cosh(x) * cosh(x) - sinh(x) * sinh(x) = -1 if (Token::Match(tok, "pow|powf|powl (")) { if (Token::Match(tok->tokAt(2), "sin|sinf|sinl (")) { Token * const tok2 = tok->linkAt(3); if (!Token::Match(tok2, ") , %num% ) + pow|powf|powl ( cos|cosf|cosl (")) continue; const std::string& leftExponent = tok2->strAt(2); if (!isTwoNumber(leftExponent)) continue; // left exponent is not 2 const Token * const tok3 = tok2->tokAt(8); Token * const tok4 = tok3->link(); if (!Token::Match(tok4, ") , %num% )")) continue; const std::string& rightExponent = tok4->strAt(2); if (!isTwoNumber(rightExponent)) continue; // right exponent is not 2 if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok4->next())) { Token::eraseTokens(tok, tok4->tokAt(4)); tok->str("1"); } } else if (Token::Match(tok->tokAt(2), "cos|cosf|cosl (")) { Token * const tok2 = tok->linkAt(3); if (!Token::Match(tok2, ") , %num% ) + pow|powf|powl ( sin|sinf|sinl (")) continue; const std::string& leftExponent = tok2->strAt(2); if (!isTwoNumber(leftExponent)) continue; // left exponent is not 2 const Token * const tok3 = tok2->tokAt(8); Token * const tok4 = tok3->link(); if (!Token::Match(tok4, ") , %num% )")) continue; const std::string& rightExponent = tok4->strAt(2); if (!isTwoNumber(rightExponent)) continue; // right exponent is not 2 if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok4->next())) { Token::eraseTokens(tok, tok4->tokAt(4)); tok->str("1"); } } else if (Token::Match(tok->tokAt(2), "sinh|sinhf|sinhl (")) { Token * const tok2 = tok->linkAt(3); if (!Token::Match(tok2, ") , %num% ) - pow|powf|powl ( cosh|coshf|coshl (")) continue; const std::string& leftExponent = tok2->strAt(2); if (!isTwoNumber(leftExponent)) continue; // left exponent is not 2 const Token * const tok3 = tok2->tokAt(8); Token * const tok4 = tok3->link(); if (!Token::Match(tok4, ") , %num% )")) continue; const std::string& rightExponent = tok4->strAt(2); if (!isTwoNumber(rightExponent)) continue; // right exponent is not 2 if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok4->next())) { Token::eraseTokens(tok, tok4->tokAt(4)); tok->str("-1"); } } else if (Token::Match(tok->tokAt(2), "cosh|coshf|coshl (")) { Token * const tok2 = tok->linkAt(3); if (!Token::Match(tok2, ") , %num% ) - pow|powf|powl ( sinh|sinhf|sinhl (")) continue; const std::string& leftExponent = tok2->strAt(2); if (!isTwoNumber(leftExponent)) continue; // left exponent is not 2 const Token * const tok3 = tok2->tokAt(8); Token * const tok4 = tok3->link(); if (!Token::Match(tok4, ") , %num% )")) continue; const std::string& rightExponent = tok4->strAt(2); if (!isTwoNumber(rightExponent)) continue; // right exponent is not 2 if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok4->next())) { Token::eraseTokens(tok, tok4->tokAt(4)); tok->str("-1"); } } } } } bool Tokenizer::simplifyStrlen() { // replace strlen(str) bool modified=false; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "strlen ( %str% )")) { tok->str(MathLib::toString(Token::getStrLength(tok->tokAt(2)))); tok->deleteNext(3); modified=true; } } return modified; } void Tokenizer::prepareTernaryOpForAST() { // http://en.cppreference.com/w/cpp/language/operator_precedence says about ternary operator: // "The expression in the middle of the conditional operator (between ? and :) is parsed as if parenthesized: its precedence relative to ?: is ignored." // The AST parser relies on this function to add such parentheses where necessary. for (Token* tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "?") { bool parenthesesNeeded = false; int depth = 0; Token* tok2 = tok->next(); for (; tok2; tok2 = tok2->next()) { if (tok2->link() && Token::Match(tok2, "[|(|<")) tok2 = tok2->link(); else if (tok2->str() == ":") { if (depth == 0) break; depth--; } else if (tok2->str() == ";" || (tok2->link() && tok2->str() != "{" && tok2->str() != "}")) break; else if (tok2->str() == ",") parenthesesNeeded = true; else if (tok2->str() == "<") parenthesesNeeded = true; else if (tok2->str() == "?") { depth++; parenthesesNeeded = true; } } if (parenthesesNeeded && tok2 && tok2->str() == ":") { tok->insertToken("("); tok2->insertToken(")", emptyString, true); Token::createMutualLinks(tok->next(), tok2->previous()); } } } } void Tokenizer::reportError(const Token* tok, const Severity::SeverityType severity, const std::string& id, const std::string& msg, bool inconclusive) const { const std::list callstack(1, tok); reportError(callstack, severity, id, msg, inconclusive); } void Tokenizer::reportError(const std::list& callstack, Severity::SeverityType severity, const std::string& id, const std::string& msg, bool inconclusive) const { const ErrorMessage errmsg(callstack, &list, severity, id, msg, inconclusive ? Certainty::inconclusive : Certainty::normal); if (mErrorLogger) mErrorLogger->reportErr(errmsg); else Check::reportError(errmsg); } void Tokenizer::setPodTypes() { if (!mSettings) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName()) continue; // pod type const struct Library::PodType *podType = mSettings->library.podtype(tok->str()); if (podType) { const Token *prev = tok->previous(); while (prev && prev->isName()) prev = prev->previous(); if (prev && !Token::Match(prev, ";|{|}|,|(")) continue; tok->isStandardType(true); } } } const Token *Tokenizer::findSQLBlockEnd(const Token *tokSQLStart) { const Token *tokLastEnd = nullptr; for (const Token *tok = tokSQLStart->tokAt(2); tok != nullptr; tok = tok->next()) { if (tokLastEnd == nullptr && tok->str() == ";") tokLastEnd = tok; else if (tok->str() == "__CPPCHECK_EMBEDDED_SQL_EXEC__") { if (Token::simpleMatch(tok->tokAt(-2), "END - __CPPCHECK_EMBEDDED_SQL_EXEC__ ;")) return tok->next(); return tokLastEnd; } else if (Token::Match(tok, "{|}|==|&&|!|^|<<|>>|++|+=|-=|/=|*=|>>=|<<=|~")) break; // We are obviously outside the SQL block } return tokLastEnd; } void Tokenizer::simplifyNestedNamespace() { if (!isCPP()) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (Token::Match(tok, "namespace %name% ::") && tok->strAt(-1) != "using") { Token * tok2 = tok->tokAt(2); // validate syntax while (Token::Match(tok2, ":: %name%")) tok2 = tok2->tokAt(2); if (!tok2 || tok2->str() != "{") return; // syntax error std::stack links; tok2 = tok->tokAt(2); while (tok2->str() == "::") { links.push(tok2); tok2->str("{"); tok2->insertToken("namespace"); tok2 = tok2->tokAt(3); } tok = tok2; if (!links.empty() && tok2->str() == "{") { tok2 = tok2->link(); while (!links.empty()) { tok2->insertToken("}"); tok2 = tok2->next(); Token::createMutualLinks(links.top(), tok2); links.pop(); } } } } } void Tokenizer::simplifyCoroutines() { if (!isCPP() || mSettings->standards.cpp < Standards::CPP20) return; for (Token *tok = list.front(); tok; tok = tok->next()) { if (!tok->isName() || !Token::Match(tok, "co_return|co_yield|co_await")) continue; Token *end = tok->next(); while (end && end->str() != ";") { if (Token::Match(end, "[({[]")) end = end->link(); else if (Token::Match(end, "[)]}]")) break; end = end->next(); } if (Token::simpleMatch(end, ";")) { tok->insertToken("("); end->previous()->insertToken(")"); Token::createMutualLinks(tok->next(), end->previous()); } } } static bool sameTokens(const Token *first, const Token *last, const Token *other) { while (other && first->str() == other->str()) { if (first == last) return true; first = first->next(); other = other->next(); } return false; } static bool alreadyHasNamespace(const Token *first, const Token *last, const Token *end) { while (end && last->str() == end->str()) { if (first == last) return true; last = last->previous(); end = end->previous(); } return false; } static Token * deleteAlias(Token * tok) { Token::eraseTokens(tok, Token::findsimplematch(tok, ";")); // delete first token tok->deleteThis(); // delete ';' if not last token tok->deleteThis(); return tok; } void Tokenizer::simplifyNamespaceAliases() { if (!isCPP()) return; int scope = 0; for (Token *tok = list.front(); tok; tok = tok->next()) { if (tok->str() == "{") scope++; else if (tok->str() == "}") scope--; else if (Token::Match(tok, "namespace %name% =")) { const std::string name(tok->next()->str()); Token * tokNameStart = tok->tokAt(3); Token * tokNameEnd = tokNameStart; while (tokNameEnd && tokNameEnd->next() && tokNameEnd->next()->str() != ";") tokNameEnd = tokNameEnd->next(); if (!tokNameEnd) return; // syntax error int endScope = scope; Token * tokLast = tokNameEnd->next(); Token * tokNext = tokLast->next(); Token * tok2 = tokNext; while (tok2 && endScope >= scope) { if (Token::simpleMatch(tok2, "{")) endScope++; else if (Token::simpleMatch(tok2, "}")) endScope--; else if (tok2->str() == name) { if (Token::Match(tok2->previous(), "namespace %name% =")) { // check for possible duplicate aliases if (sameTokens(tokNameStart, tokNameEnd, tok2->tokAt(2))) { // delete duplicate tok2 = deleteAlias(tok2->previous()); continue; } else { // conflicting declaration (syntax error) // cppcheck-suppress duplicateBranch - remove when TODO below is addressed if (endScope == scope) { // delete conflicting declaration tok2 = deleteAlias(tok2->previous()); } // new declaration else { // TODO: use the new alias in this scope tok2 = deleteAlias(tok2->previous()); } continue; } } if (tok2->strAt(1) == "::" && !alreadyHasNamespace(tokNameStart, tokNameEnd, tok2)) { tok2->str(tokNameStart->str()); Token * tok3 = tokNameStart; while (tok3 != tokNameEnd) { tok2->insertToken(tok3->next()->str()); tok2 = tok2->next(); tok3 = tok3->next(); } } } tok2 = tok2->next(); } if (tok->previous() && tokNext) { Token::eraseTokens(tok->previous(), tokNext); tok = tokNext->previous(); } else if (tok->previous()) { Token::eraseTokens(tok->previous(), tokLast); tok = tokLast; } else if (tokNext) { Token::eraseTokens(tok, tokNext); tok->deleteThis(); } else { Token::eraseTokens(tok, tokLast); tok->deleteThis(); } } } } Tokenizer::VariableMap::VariableMap() : mVarId(0) {} void Tokenizer::VariableMap::enterScope() { mScopeInfo.push(std::list>()); } bool Tokenizer::VariableMap::leaveScope() { if (mScopeInfo.empty()) return false; for (const std::pair &outerVariable : mScopeInfo.top()) { if (outerVariable.second != 0) mVariableId[outerVariable.first] = outerVariable.second; else mVariableId.erase(outerVariable.first); } mScopeInfo.pop(); return true; } void Tokenizer::VariableMap::addVariable(const std::string &varname) { if (mScopeInfo.empty()) { mVariableId[varname] = ++mVarId; return; } std::map::iterator it = mVariableId.find(varname); if (it == mVariableId.end()) { mScopeInfo.top().push_back(std::pair(varname, 0)); mVariableId[varname] = ++mVarId; return; } mScopeInfo.top().push_back(std::pair(varname, it->second)); it->second = ++mVarId; } bool Tokenizer::VariableMap::hasVariable(const std::string &varname) const { return mVariableId.find(varname) != mVariableId.end(); } bool Tokenizer::hasIfdef(const Token *start, const Token *end) const { if (!mPreprocessor) return false; for (const Directive &d: mPreprocessor->getDirectives()) { if (d.str.compare(0,3,"#if") == 0 && d.linenr >= start->linenr() && d.linenr <= end->linenr() && start->fileIndex() < list.getFiles().size() && d.file == list.getFiles()[start->fileIndex()]) return true; } return false; }