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cppcheck/lib/tokenize.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2013 Daniel Marjamäki and 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 <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
#include "tokenize.h"
#include "mathlib.h"
#include "settings.h"
#include "check.h"
#include "path.h"
#include "symboldatabase.h"
#include "templatesimplifier.h"
#include "timer.h"
#include <cstring>
#include <sstream>
#include <cassert>
#include <cctype>
#include <stack>
//---------------------------------------------------------------------------
Tokenizer::Tokenizer() :
list(0),
_settings(0),
_errorLogger(0),
_symbolDatabase(0),
_varId(0),
_codeWithTemplates(false), //is there any templates?
m_timerResults(NULL)
{
}
Tokenizer::Tokenizer(const Settings *settings, ErrorLogger *errorLogger) :
list(settings),
_settings(settings),
_errorLogger(errorLogger),
_symbolDatabase(0),
_varId(0),
_codeWithTemplates(false), //is there any templates?
m_timerResults(NULL)
{
// make sure settings are specified
assert(_settings);
}
Tokenizer::~Tokenizer()
{
delete _symbolDatabase;
}
//---------------------------------------------------------------------------
// SizeOfType - gives the size of a type
//---------------------------------------------------------------------------
unsigned int Tokenizer::sizeOfType(const Token *type) const
{
if (!type || type->str().empty())
return 0;
if (type->type() == Token::eString)
return static_cast<unsigned int>(Token::getStrLength(type) + 1);
std::map<std::string, unsigned int>::const_iterator it = _typeSize.find(type->str());
if (it == _typeSize.end())
return 0;
else if (type->isLong()) {
if (type->str() == "double")
return _settings->sizeof_long_double;
else if (type->str() == "long")
return _settings->sizeof_long_long;
}
return it->second;
}
//---------------------------------------------------------------------------
Token *Tokenizer::copyTokens(Token *dest, const Token *first, const Token *last, bool one_line)
{
std::stack<Token *> links;
Token *tok2 = dest;
unsigned int linenrs = dest->linenr();
unsigned int commonFileIndex = dest->fileIndex();
for (const Token *tok = first; tok != last->next(); tok = tok->next()) {
tok2->insertToken(tok->str());
tok2 = tok2->next();
tok2->fileIndex(commonFileIndex);
tok2->linenr(linenrs);
tok2->type(tok->type());
tok2->isUnsigned(tok->isUnsigned());
tok2->isSigned(tok->isSigned());
tok2->isPointerCompare(tok->isPointerCompare());
tok2->isLong(tok->isLong());
tok2->isUnused(tok->isUnused());
tok2->setExpandedMacro(tok->isExpandedMacro());
tok2->varId(tok->varId());
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[" || tok2->str() == "{")
links.push(tok2);
else if (tok2->str() == ")" || tok2->str() == "]" || tok2->str() == "}") {
if (links.empty())
return tok2;
Token * link = links.top();
tok2->link(link);
link->link(tok2);
links.pop();
}
if (!one_line && tok->next())
linenrs += tok->next()->linenr() - tok->linenr();
}
return tok2;
}
//---------------------------------------------------------------------------
void Tokenizer::duplicateTypedefError(const Token *tok1, const Token *tok2, const std::string &type) const
{
if (tok1 && !(_settings->isEnabled("style") && _settings->inconclusive))
return;
std::list<const Token*> locationList;
locationList.push_back(tok1);
locationList.push_back(tok2);
const std::string tok2_str = tok2 ? tok2->str() : std::string("name");
reportError(locationList, Severity::style, "variableHidingTypedef",
std::string("The " + type + " '" + tok2_str + "' hides a typedef with the same name."), true);
}
void Tokenizer::duplicateDeclarationError(const Token *tok1, const Token *tok2, const std::string &type) const
{
if (tok1 && !(_settings->isEnabled("style")))
return;
std::list<const Token*> locationList;
locationList.push_back(tok1);
locationList.push_back(tok2);
const std::string tok2_str = tok2 ? tok2->str() : std::string("name");
reportError(locationList, Severity::style, "unnecessaryForwardDeclaration",
std::string("The " + type + " '" + tok2_str + "' forward declaration is unnecessary. Type " + type + " is already declared earlier."));
}
// check if this statement is a duplicate definition
bool Tokenizer::duplicateTypedef(Token **tokPtr, const Token *name, const Token *typeDef, bool undefinedStruct) 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() == "[") {
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->next();
}
if (end)
end = end->next();
} else if (end->str() == "(") {
if (tok->previous()->str().find("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;
duplicateTypedefError(*tokPtr, name, "template instantiation");
*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")) {
duplicateTypedefError(*tokPtr, name, "function parameter");
// 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) {
duplicateTypedefError(*tokPtr, name, "template parameter");
*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") {
duplicateTypedefError(*tokPtr, name, "typedef");
return true;
} else if (tok->previous()->str() == "enum") {
duplicateTypedefError(*tokPtr, name, "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() == "{") {
if (!undefinedStruct)
duplicateTypedefError(*tokPtr, name, "struct");
return true;
} else if (Token::Match(tok->next(), ")|*")) {
return true;
} else if (tok->next()->str() == name->str()) {
return true;
} else if (tok->next()->str() != ";") {
duplicateTypedefError(*tokPtr, name, "struct");
return true;
} else {
// forward declaration after declaration
duplicateDeclarationError(*tokPtr, name, "struct");
return false;
}
} else if (tok->previous()->str() == "union") {
if (tok->next()->str() != ";") {
duplicateTypedefError(*tokPtr, name, "union");
return true;
} else {
// forward declaration after declaration
duplicateDeclarationError(*tokPtr, name, "union");
return false;
}
} else if (tok->previous()->str() == "class") {
if (tok->next()->str() != ";") {
duplicateTypedefError(*tokPtr, name, "class");
return true;
} else {
// forward declaration after declaration
duplicateDeclarationError(*tokPtr, name, "class");
return false;
}
}
tok = tok->previous();
}
duplicateTypedefError(*tokPtr, name, "variable");
return true;
}
}
}
}
return false;
}
void Tokenizer::unsupportedTypedef(const Token *tok) const
{
if (!_settings->debugwarnings)
return;
std::ostringstream str;
const Token *tok1 = tok;
unsigned int level = 0;
while (tok) {
if (level == 0 && tok->str() == ";")
break;
else if (tok->str() == "{")
++level;
else if (tok->str() == "}") {
if (!level)
break;
--level;
}
if (tok != tok1)
str << " ";
str << tok->str();
tok = tok->next();
}
if (tok)
str << " ;";
reportError(tok1, Severity::debug, "debug",
"Failed to parse \'" + str.str() + "\'. The checking continues anyway.");
}
Token * Tokenizer::deleteInvalidTypedef(Token *typeDef)
{
Token *tok = NULL;
// 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;
}
struct Space {
std::string className;
const Token * classEnd;
bool isNamespace;
};
static Token *splitDefinitionFromTypedef(Token *tok)
{
Token *tok1;
std::string name;
bool isConst = false;
if (tok->next()->str() == "const") {
tok->deleteNext();
isConst = true;
}
if (tok->strAt(2) == "{") { // unnamed
tok1 = tok->linkAt(2);
if (tok1 && tok1->next()) {
// use typedef name if available
if (Token::Match(tok1->next(), "%type%"))
name = tok1->next()->str();
else { // create a unique name
static unsigned int count = 0;
name = "Unnamed" + MathLib::longToString(count++);
}
tok->next()->insertToken(name);
} else
return NULL;
} else if (tok->strAt(3) == ":") {
tok1 = tok->tokAt(4);
while (tok1 && tok1->str() != "{")
tok1 = tok1->next();
if (!tok1)
return NULL;
tok1 = tok1->link();
name = tok->strAt(2);
} else { // has a name
tok1 = tok->linkAt(3);
if (!tok1)
return NULL;
name = tok->strAt(2);
}
tok1->insertToken(";");
tok1 = tok1->next();
if (tok1->next() && tok1->next()->str() == ";" && tok1->previous()->str() == "}") {
tok->deleteThis();
tok1->deleteThis();
return NULL;
} 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 */
static Token *processFunc(Token *tok2, bool inOperator)
{
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, "%var% ::"))
tok2 = tok2->tokAt(2);
if (!tok2)
return NULL;
if (tok2->str() == "(" &&
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()->str() == "(")
tok2 = tok2->next()->link();
}
}
}
}
return tok2;
}
void Tokenizer::simplifyTypedef()
{
std::vector<Space> spaceInfo;
bool isNamespace = false;
std::string className;
bool hasClass = false;
bool goback = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (_errorLogger && !list.getFiles().empty())
_errorLogger->reportProgress(list.getFiles()[0], "Tokenize (typedef)", tok->progressValue());
if (_settings && _settings->terminated())
return;
if (goback) {
//jump back once, see the comment at the end of the function
goback = false;
tok = tok->previous();
}
// Skip typedefs inside parentheses (#2453 and #4002)
if (tok->str() == "(" && tok->strAt(1) == "typedef") {
tok = tok->next();
continue;
}
if (Token::Match(tok, "class|struct|namespace %any%") &&
(!tok->previous() || (tok->previous() && tok->previous()->str() != "enum"))) {
isNamespace = (tok->str() == "namespace");
hasClass = true;
className = tok->next()->str();
continue;
} else if (hasClass && tok->str() == ";") {
hasClass = false;
continue;
} else if (hasClass && tok->str() == "{") {
Space info;
info.isNamespace = isNamespace;
info.className = className;
info.classEnd = tok->link();
spaceInfo.push_back(info);
hasClass = false;
continue;
} else if (!spaceInfo.empty() && tok->str() == "}" && spaceInfo.back().classEnd == tok) {
spaceInfo.pop_back();
continue;
} else if (tok->str() != "typedef")
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::Match(tok->next(), "const| struct|enum|union|class {")) {
Token *tok1 = splitDefinitionFromTypedef(tok);
if (!tok1)
continue;
tok = tok1;
} else if (Token::Match(tok->next(), "const| struct|class %type% :")) {
Token *tok1 = tok;
while (tok1 && tok1->str() != ";" && tok1->str() != "{")
tok1 = tok1->next();
if (tok1 && tok1->str() == "{") {
tok1 = splitDefinitionFromTypedef(tok);
if (!tok1)
continue;
tok = tok1;
}
}
/** @todo add support for union */
bool undefinedStruct = false;
if (Token::Match(tok, "typedef enum|struct %type% %type% ;") && tok->strAt(2) == tok->strAt(3)) {
if (tok->next()->str() == "enum") {
tok->deleteNext(3);
tok->deleteThis();
if (tok->next())
tok->deleteThis();
//now the next token to process is 'tok', not 'tok->next()';
goback = true;
continue;
} else {
const std::string pattern("struct " + tok->strAt(2) + " {|:");
const Token *tok2 = Token::findmatch(list.front(), pattern.c_str(), tok);
if (!tok2)
undefinedStruct = true;
}
}
Token *typeName;
std::list<std::string> pointers;
Token *typeStart = 0;
Token *typeEnd = 0;
Token *argStart = 0;
Token *argEnd = 0;
Token *arrayStart = 0;
Token *arrayEnd = 0;
Token *specStart = 0;
Token *specEnd = 0;
Token *typeDef = tok;
Token *argFuncRetStart = 0;
Token *argFuncRetEnd = 0;
Token *funcStart = 0;
Token *funcEnd = 0;
Token *tokOffset = tok->next();
bool function = false;
bool functionPtr = false;
bool functionRef = false;
bool functionRetFuncPtr = false;
bool functionPtrRetFuncPtr = false;
bool ptrToArray = false;
bool refToArray = false;
bool ptrMember = false;
bool typeOf = false;
Token *namespaceStart = 0;
Token *namespaceEnd = 0;
// check for invalid input
if (!tok->next()) {
syntaxError(tok);
return;
}
if (tok->next()->str() == "::" || Token::Match(tok->next(), "%type%")) {
typeStart = tok->next();
while (Token::Match(tokOffset, "const|signed|unsigned|struct|enum %type%") ||
(tokOffset->next() && tokOffset->next()->isStandardType()))
tokOffset = tokOffset->next();
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);
return;
}
// check for template
if (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();
}
// 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);
return;
}
if (Token::Match(tokOffset, "%type%")) {
// found the type name
typeName = tokOffset;
tokOffset = tokOffset->next();
// check for array
if (tokOffset && tokOffset->str() == "[") {
arrayStart = tokOffset;
bool atEnd = false;
while (!atEnd) {
while (tokOffset->next() && !Token::Match(tokOffset->next(), ";|,")) {
tokOffset = tokOffset->next();
}
if (!tokOffset->next())
return; // invalid input
else if (tokOffset->next()->str() == ";")
atEnd = true;
else if (tokOffset->str() == "]")
atEnd = true;
else
tokOffset = tokOffset->next();
}
arrayEnd = tokOffset;
tokOffset = tokOffset->next();
}
// check for end or another
if (Token::Match(tokOffset, ";|,"))
tok = tokOffset;
// or a function typedef
else if (tokOffset && tokOffset->str() == "(") {
// 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;
}
// unhandled function pointer, skip it and continue
// TODO: handle such typedefs. See ticket #3314
else if (Token::Match(tokOffset, "( %type% ::") &&
Token::Match(tokOffset->link()->tokAt(-3), ":: * %var% ) (")) {
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(tokOffset, "( * %var% ) (")) {
// name token wasn't a name, it was part of the type
typeEnd = typeEnd->next();
functionPtr = true;
tokOffset = tokOffset->next();
funcStart = tokOffset;
funcEnd = tokOffset;
tokOffset = tokOffset->tokAt(3);
typeName = tokOffset->tokAt(-2);
argStart = tokOffset;
argEnd = tokOffset->link();
tok = argEnd->next();
}
// function
else if (Token::Match(tokOffset->link(), ") const| ;|,")) {
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);
return;
}
}
// 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() == "(" &&
Token::Match(tokOffset->link()->previous(), "%type% ) (") &&
Token::Match(tokOffset->link()->next()->link(), ") const|volatile|;")) ||
(Token::simpleMatch(tokOffset, "( (") &&
Token::Match(tokOffset->next()->link()->previous(), "%type% ) (") &&
Token::Match(tokOffset->next()->link()->next()->link(), ") const|volatile| ) ;|,")) ||
(Token::simpleMatch(tokOffset, "( * (") &&
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.push_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();
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->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();
argFuncRetStart = argEnd->tokAt(2);
argFuncRetEnd = argFuncRetStart->link();
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);
argFuncRetEnd = argFuncRetStart->link();
tok = argFuncRetEnd->next();
} else if (Token::Match(tokOffset, "( * ( %type% ) (")) {
functionRetFuncPtr = true;
tokOffset = tokOffset->tokAt(5);
typeName = tokOffset->tokAt(-2);
argStart = tokOffset;
argEnd = tokOffset->link();
argFuncRetStart = argEnd->tokAt(2);
argFuncRetEnd = argFuncRetStart->link();
tok = argFuncRetEnd->next();
}
// pointer/reference to array
else if (Token::Match(tokOffset, "( *|& %type% ) [")) {
ptrToArray = (tokOffset->next()->str() == "*");
refToArray = (tokOffset->next()->str() == "&");
tokOffset = tokOffset->tokAt(2);
typeName = tokOffset;
arrayStart = tokOffset->tokAt(2);
arrayEnd = arrayStart->link();
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;
while (!done) {
std::string pattern = typeName->str();
int scope = 0;
bool inScope = true;
bool exitThisScope = false;
int exitScope = 0;
bool simplifyType = false;
bool inMemberFunc = false;
int memberScope = 0;
bool globalScope = false;
std::size_t classLevel = spaceInfo.size();
for (Token *tok2 = tok; tok2; tok2 = tok2->next()) {
if (_settings && _settings->terminated())
return;
// check for end of scope
if (tok2->str() == "}") {
// check for end of member function
if (inMemberFunc) {
--memberScope;
if (memberScope == 0)
inMemberFunc = false;
}
if (classLevel > 0 && tok2 == spaceInfo[classLevel - 1].classEnd) {
--classLevel;
pattern.clear();
for (std::size_t i = classLevel; i < spaceInfo.size(); ++i)
pattern += (spaceInfo[i].className + " :: ");
pattern += typeName->str();
} else {
--scope;
if (scope < 0)
inScope = false;
if (exitThisScope) {
if (scope < exitScope)
exitThisScope = false;
}
}
}
// check for operator typedef
/** @todo add support for multi-token operators */
else if (tok2->str() == "operator" &&
tok2->next()->str() == typeName->str() &&
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.empty() && classLevel < spaceInfo.size() &&
tok2->strAt(-2) == spaceInfo[classLevel].className) {
tok2 = tok2->next();
simplifyType = true;
}
}
}
// check for member functions
else if (Token::Match(tok2, ") const| {")) {
const Token *func = tok2->link()->previous();
if (!func)
continue;
if (func->previous()) { // Ticket #4239
/** @todo add support for multi-token operators */
if (func->previous()->str() == "operator")
func = func->previous();
// check for qualifier
if (func->previous()->str() == "::") {
// check for available and matching class name
if (!spaceInfo.empty() && classLevel < spaceInfo.size() &&
func->strAt(-2) == spaceInfo[classLevel].className) {
memberScope = 0;
inMemberFunc = true;
}
}
}
}
// check for entering a new namespace
else if (Token::Match(tok2, "namespace %any% {")) {
if (classLevel < spaceInfo.size() &&
spaceInfo[classLevel].isNamespace &&
spaceInfo[classLevel].className == tok2->next()->str()) {
++classLevel;
pattern.clear();
for (std::size_t i = classLevel; i < spaceInfo.size(); ++i)
pattern += (spaceInfo[i].className + " :: ");
pattern += typeName->str();
}
++scope;
}
// check for entering a new scope
else if (tok2->str() == "{") {
// keep track of scopes within member function
if (inMemberFunc)
++memberScope;
++scope;
}
// check for typedef that can be substituted
else if (Token::Match(tok2, pattern.c_str()) ||
(inMemberFunc && tok2->str() == typeName->str())) {
std::string pattern1;
// member function class variables don't need qualification
if (inMemberFunc && tok2->str() == typeName->str())
pattern1 = tok2->str();
else
pattern1 = pattern;
if (pattern1.find("::") != std::string::npos) { // has a "something ::"
if (tok2->strAt(-1) == "::") {
tok2->tokAt(-2)->deleteNext();
globalScope = true;
}
for (std::size_t i = classLevel; i < spaceInfo.size(); ++i) {
tok2->deleteNext(2);
}
simplifyType = true;
} else if ((inScope && !exitThisScope) || inMemberFunc) {
if (tok2->strAt(-1) == "::") {
// Don't replace this typename if it's preceded by "::" unless it's a namespace
if (!spaceInfo.empty() && (tok2->strAt(-2) == spaceInfo[0].className) && spaceInfo[0].isNamespace) {
tok2->tokAt(-3)->deleteNext(2);
simplifyType = true;
}
} else if (Token::Match(tok2->previous(), "case %type% :")) {
tok2 = tok2->next();
} else if (duplicateTypedef(&tok2, typeName, typeDef, undefinedStruct)) {
exitScope = scope;
// 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 (tok2->previous()->str() != ".") {
simplifyType = true;
}
}
}
if (simplifyType) {
// can't simplify 'operator functionPtr ()' and 'functionPtr operator ... ()'
if (functionPtr && (tok2->previous()->str() == "operator" ||
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;
// check for derived class: class A : some_typedef {
bool isDerived = Token::Match(tok2->previous(), "public|protected|private %type% {|,");
// check for cast: (some_typedef) A or static_cast<some_typedef>(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(), "> (")))
inCast = true;
// check for template parameters: t<some_typedef> 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;
// 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();
}
// 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 (std::size_t i = classLevel; i < spaceInfo.size(); ++i) {
tok2->insertToken(spaceInfo[i].className);
tok2 = tok2->next();
tok2->insertToken("::");
tok2 = tok2->next();
}
}
// add remainder of type
tok2 = copyTokens(tok2, typeStart->next(), typeEnd);
if (!pointers.empty()) {
std::list<std::string>::const_iterator iter;
for (iter = pointers.begin(); iter != pointers.end(); ++iter) {
tok2->insertToken(*iter);
tok2 = tok2->next();
}
}
if (funcStart && funcEnd) {
tok2->insertToken("(");
tok2 = tok2->next();
Token *tok3 = tok2;
tok2 = copyTokens(tok2, funcStart, funcEnd);
if (!inCast)
tok2 = processFunc(tok2, inOperator);
if (!tok2)
break;
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
tok2 = 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 || functionRef || 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();
} else if (functionRef) {
tok2->insertToken("&");
tok2 = tok2->next();
}
if (!inCast)
tok2 = processFunc(tok2, inOperator);
if (needParen) {
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
}
tok2 = copyTokens(tok2, argStart, argEnd);
if (inTemplate)
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 = 0;
if (functionPtrRetFuncPtr) {
tok2->insertToken("(");
tok2 = tok2->next();
tok4 = tok2;
tok2->insertToken("*");
tok2 = tok2->next();
}
// skip over variable name if there
if (!inCast) {
if (tok2->next()->str() != ")")
tok2 = tok2->next();
}
if (tok4 && functionPtrRetFuncPtr) {
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok4);
}
tok2 = copyTokens(tok2, argStart, argEnd);
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
tok2 = 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();
// skip over name
if (tok2->next()->str() != ")") {
if (tok2->next()->str() != "(")
tok2 = tok2->next();
// check for function and skip over args
if (tok2->next()->str() == "(")
tok2 = tok2->next()->link();
// check for array
if (tok2->next()->str() == "[")
tok2 = tok2->next()->link();
} else {
// syntax error
}
tok2->insertToken(")");
Token::createMutualLinks(tok2->next(), tok3);
} else if (ptrMember) {
if (Token::simpleMatch(tok2, "* (")) {
tok2->insertToken("*");
tok2 = tok2->next();
} else {
tok2->insertToken("(");
tok2 = tok2->next();
Token *tok3 = 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();
// skip over name
tok2 = tok2->next();
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
}
} else if (typeOf) {
tok2 = copyTokens(tok2, argStart, argEnd);
} else if (tok2->tokAt(2) && tok2->strAt(2) == "[") {
while (tok2->tokAt(2) && tok2->strAt(2) == "[")
tok2 = tok2->linkAt(2)->previous();
}
if (arrayStart && arrayEnd) {
do {
if (!tok2->next()) {
syntaxError(tok2);
return; // can't recover so quit
}
if (!inCast && !inSizeof)
tok2 = tok2->next();
// reference to array?
if (tok2->str() == "&") {
tok2 = tok2->previous();
tok2->insertToken("(");
Token *tok3 = tok2->next();
// handle missing variable name
if (tok2->strAt(3) == ")" || tok2->strAt(3) == ",")
tok2 = tok2->tokAt(2);
else
tok2 = tok2->tokAt(3);
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
}
if (!tok2->next()) {
syntaxError(tok2);
return; // can't recover so quit
}
tok2 = copyTokens(tok2, arrayStart, arrayEnd);
tok2 = tok2->next();
if (tok2->str() == "=") {
if (tok2->next()->str() == "{")
tok2 = tok2->next()->link()->next();
else if (tok2->next()->str().at(0) == '\"')
tok2 = tok2->tokAt(2);
}
} while (Token::Match(tok2, ", %var% ;|'|=|,"));
}
simplifyType = false;
}
}
if (tok->str() == ";")
done = true;
else if (tok->str() == ",") {
arrayStart = 0;
arrayEnd = 0;
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;
bool atEnd = false;
while (!atEnd) {
while (tokOffset->next() && !Token::Match(tokOffset->next(), ";|,"))
tokOffset = tokOffset->next();
if (!tokOffset->next())
return; // invalid input
else if (tokOffset->next()->str() == ";")
atEnd = true;
else if (tokOffset->str() == "]")
atEnd = true;
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;
}
}
}
}
void Tokenizer::simplifyMulAndParens()
{
for (Token *tok = list.front()->tokAt(3); tok; tok = tok->next()) {
if (tok->isName()) {
//fix ticket #2784 - improved by ticket #3184
unsigned 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 (tokbegin && (tokbegin->str() == "&" || tokbegin->str() == "(")) {
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)
break;
--closedpars;
//remove ')'
tok->deleteNext();
//remove '* ( &'
tokbegin = tokbegin->tokAt(-3);
tokbegin->deleteNext(3);
} else
break;
} else if (tokbegin->str() == "(") {
if (!closedpars)
break;
//find consecutive opening parentheses
unsigned 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--) {
tok->deleteNext();
tokbegin->deleteNext();
--closedpars;
}
} else
break;
}
}
}
}
}
bool Tokenizer::tokenize(std::istream &code,
const char FileName[],
const std::string &configuration)
{
// make sure settings specified
assert(_settings);
// Fill the map _typeSize..
fillTypeSizes();
_configuration = configuration;
if (!list.createTokens(code, Path::getRelativePath(Path::simplifyPath(FileName), _settings->_basePaths))) {
cppcheckError(0);
return false;
}
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 %var% (")) {
if (Token::simpleMatch(tok, "for each"))
// 'for each ( )' -> 'for ( )'
tok->deleteNext();
else {
syntaxError(tok);
return false;
}
}
}
// remove MACRO in variable declaration: MACRO int x;
removeMacroInVarDecl();
// Combine strings
combineStrings();
// replace inline SQL with "asm()" (Oracle PRO*C). Ticket: #1959
simplifySQL();
// replace __LINE__ macro with line number
simplifyFileAndLineMacro();
// Concatenate double sharp: 'a ## b' -> 'ab'
concatenateDoubleSharp();
if (!createLinks()) {
// Source has syntax errors, can't proceed
return false;
}
// 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, ") %var% (") &&
tok->next()->isUpperCaseName() &&
Token::Match(tok->linkAt(2), ") {|else")) {
syntaxError(tok->next());
return false;
}
}
}
if (_settings->terminated())
return false;
// replace 'NULL' and similar '0'-defined macros with '0'
simplifyNull();
// replace 'sin(0)' to '0' and other similar math expressions
simplifyMathExpressions();
// combine "- %num%"
concatenateNegativeNumberAndAnyPositive();
// simplify simple calculations
for (Token *tok = list.front() ? list.front()->next() : NULL; tok; tok = tok->next()) {
if (tok->isNumber())
TemplateSimplifier::simplifyNumericCalculations(tok->previous());
}
// 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);
list.deallocateTokens();
return false;
}
}
if (!simplifyAddBraces())
return false;
// Combine tokens..
combineOperators();
// 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 "volatile", "inline", "register", and "restrict"
simplifyKeyword();
// Convert K&R function declarations to modern C
simplifyVarDecl(true);
if (!simplifyFunctionParameters())
return false;
// specify array size..
arraySize();
// simplify labels and 'case|default'-like syntaxes
if (!simplifyLabelsCaseDefault())
return false;
// simplify '[;{}] * & ( %any% ) =' to '%any% ='
simplifyMulAndParens();
// ";a+=b;" => ";a=a+b;"
simplifyCompoundAssignment();
if (hasComplicatedSyntaxErrorsInTemplates()) {
list.deallocateTokens();
return false;
}
if (_settings->terminated())
return false;
// Remove __declspec()
simplifyDeclspec();
// remove some unhandled macros in global scope
removeMacrosInGlobalScope();
// remove calling conventions __cdecl, __stdcall..
simplifyCallingConvention();
// remove __attribute__((?))
simplifyAttribute();
// remove unnecessary member qualification..
removeUnnecessaryQualification();
// remove Microsoft MFC..
simplifyMicrosoftMFC();
// 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();
// Remove __builtin_expect, likely and unlikely
simplifyBuiltinExpect();
if (hasEnumsWithTypedef()) {
// #2449: syntax error: enum with typedef in it
list.deallocateTokens();
return false;
}
simplifyDebugNew();
// typedef..
if (m_timerResults) {
Timer t("Tokenizer::tokenize::simplifyTypedef", _settings->_showtime, m_timerResults);
simplifyTypedef();
} else {
simplifyTypedef();
}
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 (_settings->isEnabled("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
if (!validate()) {
// Source has syntax errors, can't proceed
return false;
}
// enum..
simplifyEnum();
// The simplify enum have inner loops
if (_settings && _settings->terminated())
return false;
// Remove __asm..
simplifyAsm();
// Put ^{} statements in asm()
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok, "^ {")) {
Token * start = tok;
while (start && !Token::Match(start, "[;{}]"))
start = start->previous();
if (start)
start = start->next();
const Token *last = tok->next()->link();
if (start != tok) {
last = last->next();
while (last && !Token::Match(last, "[;{}]"))
last = last->next();
}
if (start && last) {
std::string asmcode(start->str());
while (start->next() != last) {
asmcode += start->next()->str();
start->deleteNext();
}
asmcode += last->str();
start->deleteNext();
start->insertToken(";");
start->insertToken(")");
start->insertToken("\"" + asmcode + "\"");
start->insertToken("(");
start->str("asm");
start->link(NULL);
start->next()->link(start->tokAt(3));
start->tokAt(3)->link(start->next());
tok = start->tokAt(4);
}
}
}
// When the assembly code has been cleaned up, no @ is allowed
for (const Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(")
tok = tok->link();
else if (tok->str()[0] == '@') {
list.deallocateTokens();
return false;
}
}
// convert platform dependent types to standard types
// 32 bits: size_t -> unsigned long
// 64 bits: size_t -> unsigned long long
simplifyPlatformTypes();
// collapse compound standard types into a single token
// unsigned long long int => long _isUnsigned=true,_isLong=true
simplifyStdType();
// The simplifyTemplates have inner loops
if (_settings && _settings->terminated())
return false;
// simplify bit fields..
simplifyBitfields();
// Use "<" comparison instead of ">"
simplifyComparisonOrder();
// Simplify '(p == 0)' to '(!p)'
simplifyIfNot();
simplifyIfNotNull();
//simplify for: move out start-statement "for (a;b;c);" => "{ a; for(;b;c); }"
//not enabled because it fails many tests with testrunner.
//@todo fix these fails before enabling this simplification
/*for (Token* tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(" && ( !tok->previous() || tok->previous()->str() != "for")) {
tok = tok->link();
continue;
}
if (!Token::Match(tok->previous(),"[{};] for ("))
continue;
//find the two needed semicolons inside the 'for'
const Token *firstsemicolon = Token::findsimplematch(tok->next(), ";", tok->next()->link());
if (!firstsemicolon)
continue;
const Token *secondsemicolon = Token::findsimplematch(firstsemicolon->next(), ";", tok->next()->link());
if (!secondsemicolon)
continue;
if (Token::findsimplematch(secondsemicolon->next(), ";", tok->next()->link()))
continue; //no more than two semicolons!
if (!tok->next()->link()->next())
continue; //there should be always something after 'for (...)'
Token *fortok = tok;
Token *begin = tok->tokAt(2);
Token *end = tok->next()->link();
if ( begin->str() != ";" ) {
tok = tok->previous();
tok->insertToken(";");
tok->insertToken("{");
tok = tok->next();
if (end->next()->str() =="{") {
end = end->next()->link();
end->insertToken("}");
Token::createMutualLinks(tok, end->next());
end = end->link()->previous();
} else {
if (end->next()->str() != ";")
end->insertToken(";");
end = end->next();
end->insertToken("}");
Token::createMutualLinks(tok, end->next());
}
end = firstsemicolon->previous();
Token::move(begin, end, tok);
tok = fortok;
end = fortok->next()->link();
}
//every 'for' is changed to 'for(;b;c), now it's possible to convert the 'for' to a 'while'.
//precisely, 'for(;b;c){code}'-> 'while(b){code + c;}'
fortok->str("while");
begin = firstsemicolon->previous();
begin->deleteNext();
begin = secondsemicolon->previous();
begin->deleteNext();
begin = begin->next();
if (begin->str() == ")") { //'for(;b;)' -> 'while(b)'
if (begin->previous()->str() == "(") //'for(;;)' -> 'while(true)'
begin->previous()->insertToken("true");
tok = fortok;
continue;
}
if (end->next()->str() =="{") {
tok = end->next()->link()->previous();
tok->insertToken(";");
} else {
tok = end;
if (end->next()->str() != ";")
tok->insertToken(";");
tok->insertToken("{");
tok = tok->tokAt(2);
tok->insertToken("}");
Token::createMutualLinks(tok->previous(), tok->next());
tok = tok->previous();
}
end = end->previous();
Token::move(begin, end, tok);
tok = fortok;
}*/
// The simplifyTemplates have inner loops
if (_settings && _settings->terminated())
return false;
simplifyConst();
// struct simplification "struct S {} s; => struct S { } ; S s ;
simplifyStructDecl();
// struct initialization (must be used before simplifyVarDecl)
simplifyStructInit();
// Change initialisation of variable to assignment
simplifyInitVar();
// The simplifyTemplates have inner loops
if (_settings && _settings->terminated())
return false;
// Split up variable declarations.
simplifyVarDecl(false);
// specify array size.. needed when arrays are split
arraySize();
// f(x=g()) => x=g(); f(x)
simplifyAssignmentInFunctionCall();
// x = ({ 123; }); => { x = 123; }
simplifyAssignmentBlock();
// The simplifyTemplates have inner loops
if (_settings && _settings->terminated())
return false;
simplifyVariableMultipleAssign();
// Remove redundant parentheses
simplifyRedundantParentheses();
for (Token *tok = list.front(); tok; tok = tok->next())
while (TemplateSimplifier::simplifyNumericCalculations(tok))
;
// Handle templates..
simplifyTemplates();
// The simplifyTemplates have inner loops
if (_settings && _settings->terminated())
return false;
// Simplify templates.. sometimes the "simplifyTemplates" fail and
// then unsimplified function calls etc remain. These have the
// "wrong" syntax. So this function will just fix so that the
// syntax is corrected.
TemplateSimplifier::cleanupAfterSimplify(list.front());
// Simplify the operator "?:"
simplifyConditionOperator();
// remove exception specifications..
removeExceptionSpecifications();
// Collapse operator name tokens into single token
// operator = => operator=
simplifyOperatorName();
// Simplify pointer to standard types (C only)
simplifyPointerToStandardType();
// simplify function pointers
simplifyFunctionPointers();
// "if (not p)" => "if (!p)"
// "if (p and q)" => "if (p && q)"
// "if (p or q)" => "if (p || q)"
while (simplifyLogicalOperators()) { }
// Change initialisation of variable to assignment
simplifyInitVar();
// Split up variable declarations.
simplifyVarDecl(false);
if (m_timerResults) {
Timer t("Tokenizer::tokenize::setVarId", _settings->_showtime, m_timerResults);
setVarId();
} else {
setVarId();
}
// The simplify enum might have inner loops
if (_settings && _settings->terminated())
return false;
// Add std:: in front of std classes, when using namespace std; was given
simplifyNamespaceStd();
createLinks2();
// Change initialisation of variable to assignment
simplifyInitVar();
// Convert e.g. atol("0") into 0
simplifyMathFunctions();
simplifyDoublePlusAndDoubleMinus();
simplifyArrayAccessSyntax();
list.front()->assignProgressValues();
removeRedundantSemicolons();
simplifyParameterVoid();
simplifyRedundantConsecutiveBraces();
simplifyEmptyNamespaces();
if (!validate())
return false;
createSymbolDatabase();
// Use symbol database to identify rvalue references. Split && to & &. This is safe, since it doesn't delete any tokens (which might be referenced by symbol database)
for (std::size_t i = 0; i < _symbolDatabase->getVariableListSize(); i++) {
const Variable* var = _symbolDatabase->getVariableFromVarId(i);
if (var && var->isRValueReference()) {
const_cast<Token*>(var->typeEndToken())->str("&");
const_cast<Token*>(var->typeEndToken())->insertToken("&");
const_cast<Token*>(var->typeEndToken()->next())->scope(var->typeEndToken()->scope());
}
}
return true;
}
//---------------------------------------------------------------------------
bool Tokenizer::tokenizeCondition(const std::string &code)
{
assert(_settings);
// Fill the map _typeSize..
fillTypeSizes();
{
std::istringstream istr(code);
if (!list.createTokens(istr, "")) {
cppcheckError(0);
return false;
}
}
// Combine strings
combineStrings();
// Remove "volatile", "inline", "register", and "restrict"
simplifyKeyword();
// convert platform dependent types to standard types
// 32 bits: size_t -> unsigned long
// 64 bits: size_t -> unsigned long long
simplifyPlatformTypes();
// collapse compound standard types into a single token
// unsigned long long int => long _isUnsigned=true,_isLong=true
simplifyStdType();
// Concatenate double sharp: 'a ## b' -> 'ab'
concatenateDoubleSharp();
if (!createLinks()) {
// Source has syntax errors, can't proceed
return false;
}
// replace 'NULL' and similar '0'-defined macros with '0'
simplifyNull();
// replace 'sin(0)' to '0' and other similar math expressions
simplifyMathExpressions();
// combine "- %num%"
concatenateNegativeNumberAndAnyPositive();
// simplify simple calculations
for (Token *tok = list.front() ? list.front()->next() : NULL;
tok;
tok = tok->next()) {
if (tok->isNumber())
TemplateSimplifier::simplifyNumericCalculations(tok->previous());
}
combineOperators();
simplifyRedundantParentheses();
for (Token *tok = list.front();
tok;
tok = tok->next())
while (TemplateSimplifier::simplifyNumericCalculations(tok))
;
while (simplifyLogicalOperators()) { }
// Convert e.g. atol("0") into 0
simplifyMathFunctions();
simplifyDoublePlusAndDoubleMinus();
return true;
}
bool Tokenizer::hasComplicatedSyntaxErrorsInTemplates()
{
const Token *tok = TemplateSimplifier::hasComplicatedSyntaxErrorsInTemplates(list.front());
if (tok) {
syntaxError(tok);
return true;
}
return false;
}
bool Tokenizer::hasEnumsWithTypedef()
{
for (const Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "enum %var% {")) {
tok = tok->tokAt(2);
const Token *tok2 = Token::findsimplematch(tok, "typedef", tok->link());
if (tok2) {
syntaxError(tok2);
return true;
}
}
}
return false;
}
void Tokenizer::fillTypeSizes()
{
_typeSize.clear();
_typeSize["char"] = 1;
_typeSize["bool"] = _settings->sizeof_bool;
_typeSize["short"] = _settings->sizeof_short;
_typeSize["int"] = _settings->sizeof_int;
_typeSize["long"] = _settings->sizeof_long;
_typeSize["float"] = _settings->sizeof_float;
_typeSize["double"] = _settings->sizeof_double;
_typeSize["wchar_t"] = _settings->sizeof_wchar_t;
_typeSize["size_t"] = _settings->sizeof_size_t;
_typeSize["*"] = _settings->sizeof_pointer;
}
void Tokenizer::combineOperators()
{
// 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))) {
tok->str(tok->str() + c2);
tok->deleteNext();
continue;
}
// replace "->" with "."
else if (c1 == '-' && c2 == '>') {
tok->str(".");
tok->deleteNext();
continue;
}
}
else if (tok->str() == ">>" && tok->next()->str() == "=") {
tok->str(">>=");
tok->deleteNext();
}
else if (tok->str() == "<<" && tok->next()->str() == "=") {
tok->str("<<=");
tok->deleteNext();
}
else if ((c1 == 'p' || c1 == '_') && tok->next()->str() == ":" && tok->strAt(2) != ":") {
if (tok->str() == "private" || tok->str() == "protected" || tok->str() == "public" || tok->str() == "__published") {
tok->str(tok->str() + ":");
tok->deleteNext();
continue;
}
}
}
}
void Tokenizer::combineStrings()
{
// Combine wide strings
for (Token *tok = list.front();
tok;
tok = tok->next()) {
while (tok->str() == "L" && tok->next() && tok->next()->type() == Token::eString) {
// Combine 'L "string"'
tok->str(tok->next()->str());
tok->deleteNext();
tok->isLong(true);
}
}
// Combine strings
for (Token *tok = list.front();
tok;
tok = tok->next()) {
if (tok->str()[0] != '"')
continue;
tok->str(simplifyString(tok->str()));
while (tok->next() && tok->next()->type() == Token::eString) {
tok->next()->str(simplifyString(tok->next()->str()));
// Two strings after each other, combine them
tok->concatStr(tok->next()->str());
tok->deleteNext();
}
}
}
void Tokenizer::concatenateDoubleSharp()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::Match(tok, "%num%|%var% ## %num%|%var%")) {
tok->str(tok->str() + tok->strAt(2));
tok->deleteNext(2);
}
}
}
void Tokenizer::simplifyFileAndLineMacro()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "__FILE__")
tok->str("\"" + list.file(tok) + "\"");
else if (tok->str() == "__LINE__")
tok->str(MathLib::longToString(tok->linenr()));
}
}
void Tokenizer::simplifyNull()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "NULL" && !Token::Match(tok->previous(), "[(,] NULL [,)]"))
tok->str("0");
else if (tok->str() == "__null" || tok->str() == "'\\0'" || tok->str() == "'\\x0'")
tok->str("0");
else if (tok->isNumber() &&
MathLib::isInt(tok->str()) &&
MathLib::toLongNumber(tok->str()) == 0)
tok->str("0");
}
// nullptr..
if (isCPP() && _settings->standards.cpp == Standards::CPP11) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "nullptr")
tok->str("0");
}
}
}
void Tokenizer::concatenateNegativeNumberAndAnyPositive()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (!Token::Match(tok, "?|:|,|(|[|{|return|case|sizeof|%op% +|-") || tok->type() == Token::eIncDecOp)
continue;
if (tok->next()->str() == "+")
tok->deleteNext();
else if (Token::Match(tok->next(), "- %num%")) {
tok->deleteNext();
tok->next()->str("-" + tok->next()->str());
}
}
}
void Tokenizer::simplifyExternC()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "extern \"C\" {|")) {
if (tok->strAt(2) == "{") {
tok->linkAt(2)->deleteThis();
tok->deleteNext(2);
} else
tok->deleteNext();
tok->deleteThis();
}
}
}
void Tokenizer::simplifyRoundCurlyParentheses()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::Match(tok, "[;{}] ( {") &&
Token::simpleMatch(tok->linkAt(2), "} ) ;")) {
tok->linkAt(2)->previous()->deleteNext(3);
tok->deleteNext(2);
}
if (Token::Match(tok, "( { %bool%|%char%|%num%|%str%|%var% ; } )")) {
tok->deleteNext();
tok->deleteThis();
tok->deleteNext(3);
}
}
}
void Tokenizer::simplifySQL()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok, "EXEC SQL")) {
const Token *end = tok->tokAt(2);
while (end && end->str() != ";")
end = end->next();
std::string instruction = tok->stringifyList(end);
// delete all tokens until ';'
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::simplifyDebugNew()
{
// convert Microsoft DEBUG_NEW macro to new
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "DEBUG_NEW")
tok->str("new");
}
}
void Tokenizer::simplifyArrayAccessSyntax()
{
// 0[a] -> a[0]
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "%num% [ %var% ]")) {
const std::string temp = tok->str();
tok->str(tok->strAt(2));
tok->tokAt(2)->str(temp);
}
}
}
void Tokenizer::simplifyParameterVoid()
{
for (Token* tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "%var% ( void )"))
tok->next()->deleteNext();
}
}
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() == "+") {
tok->deleteNext();
continue;
} else 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() == "+") {
tok->deleteNext();
continue;
} else 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()
{
bool addlength = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
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();
std::size_t sz = tok->strAt(3).length() - 1;
tok->insertToken(MathLib::longToString((unsigned int)sz));
addlength = false;
tok = tok->tokAt(5);
}
else if (Token::Match(tok, "%var% [ ] = {")) {
unsigned int sz = 1;
tok = tok->next();
Token *end = tok->linkAt(3);
for (Token *tok2 = tok->tokAt(4); tok2 && tok2 != end; tok2 = tok2->next()) {
if (tok2->str() == "{" || tok2->str() == "(" || tok2->str() == "[")
tok2 = tok2->link();
else if (tok2->str() == "<") { // Bailout. TODO: When link() supports <>, this bailout becomes unnecessary
sz = 0;
break;
} else if (tok2->str() == ",") {
if (!Token::Match(tok2->next(), "[},]"))
++sz;
else {
tok2 = tok2->previous();
tok2->deleteNext();
}
}
}
if (sz != 0)
tok->insertToken(MathLib::longToString(sz));
tok = end->next() ? end->next() : end;
}
}
}
static Token *skipTernaryOp(Token *);
static Token *skipTernaryOp(Token *tok)
{
if (!tok || tok->str() != "?")
return tok;
unsigned int colonlevel = 1;
while (NULL != (tok = tok->next())) {
if (tok->str() == "?") {
++colonlevel;
} else if (tok->str() == ":") {
--colonlevel;
if (colonlevel == 0) {
tok = tok->next();
break;
}
}
if (Token::Match(tok->next(), "[{};]"))
break;
}
return tok;
}
/** simplify labels and case|default in the code: add a ";" if not already in.*/
bool Tokenizer::simplifyLabelsCaseDefault()
{
bool executablescope = false;
unsigned int indentlevel = 0;
for (Token *tok = list.front(); tok; tok = tok->next()) {
// Simplify labels in the executable scope..
if (Token::Match(tok, ") const| {")) {
tok = tok->next();
if (tok->str() != "{")
tok = tok->next();
executablescope = true;
}
if (!executablescope)
continue;
if (tok->str() == "{") {
if (tok->previous()->str() == "=")
tok = tok->link();
else
++indentlevel;
} else if (tok->str() == "}") {
--indentlevel;
if (!indentlevel) {
executablescope = false;
continue;
}
} else if (tok->str() == "(" || tok->str() == "[")
tok = tok->link();
if (Token::Match(tok, "[;{}] case")) {
while (NULL != (tok = tok->next())) {
if (tok->str() == "(" || tok->str() == "[") {
tok = tok->link();
} else if (tok->str() == "?") {
tok = skipTernaryOp(tok);
}
if (Token::Match(tok->next(),"[:{};]"))
break;
}
if (tok->str() != "case" && tok->next()->str() == ":") {
tok = tok->next();
if (tok->next()->str() != ";")
tok->insertToken(";");
} else {
syntaxError(tok);
return false;
}
} else if (Token::Match(tok, "[;{}] %var% : !!;")) {
tok = tok->tokAt(2);
tok->insertToken(";");
}
}
return true;
}
void Tokenizer::simplifyTemplates()
{
if (isC())
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
// #2648 - simple fix for sizeof used as template parameter
// TODO: this is a bit hardcoded. make a bit more generic
if (Token::Match(tok, "%var% < sizeof ( %type% ) >") && tok->tokAt(4)->isStandardType()) {
Token * const tok3 = tok->next();
const unsigned int sizeOfResult = sizeOfType(tok3->tokAt(3));
tok3->deleteNext(4);
tok3->insertToken(MathLib::longToString(sizeOfResult));
}
}
TemplateSimplifier::simplifyTemplates(
list,
*_errorLogger,
_settings,
_codeWithTemplates);
}
//---------------------------------------------------------------------------
static bool setVarIdParseDeclaration(const Token **tok, const std::map<std::string,unsigned int> &variableId, bool executableScope)
{
const Token *tok2 = *tok;
bool ref = false;
if (!tok2->isName())
return false;
unsigned int typeCount = 0;
bool hasstruct = false; // Is there a "struct" or "class"?
while (tok2) {
if (tok2->isName()) {
if (tok2->str() == "class" || tok2->str() == "struct" || tok2->str() == "union" || tok2->str() == "typename") {
hasstruct = true;
typeCount = 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 {
++typeCount;
}
} else if ((TemplateSimplifier::templateParameters(tok2) > 0) ||
Token::Match(tok2, "< >") /* Ticket #4764 */) {
tok2 = tok2->findClosingBracket();
if (!Token::Match(tok2, ">|>>"))
break;
} else if (tok2->str() == "&" || tok2->str() == "&&") {
ref = true;
} else if (tok2->str() != "*" && tok2->str() != "::") {
break;
}
tok2 = tok2->next();
}
if (tok2) {
*tok = tok2;
// In executable scopes, references must be assigned
// Catching by reference is an exception
if (executableScope && ref) {
if (tok2->str() == "(" || tok2->str() == "=")
; // 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 && tok2 && tok2->str() == "[") {
const Token *tok3 = tok2;
while (tok3 && tok3->str() == "[") {
tok3 = tok3->link()->next();
}
if (Token::Match(tok3, "= %num%"))
return false;
}
return bool(typeCount >= 2 && tok2 && Token::Match(tok2->tokAt(-2), "!!:: %type%"));
}
static void setVarIdStructMembers(Token **tok1,
std::map<unsigned int, std::map<std::string,unsigned int> > *structMembers,
unsigned int *_varId)
{
Token *tok = *tok1;
while (Token::Match(tok->next(), ". %var% !!(")) {
const unsigned int struct_varid = tok->varId();
tok = tok->tokAt(2);
if (struct_varid == 0)
continue;
// Don't set varid for template function
if (TemplateSimplifier::templateParameters(tok->next()) > 0)
break;
std::map<std::string,unsigned int>& members = (*structMembers)[struct_varid];
if (members.empty() || members.find(tok->str()) == members.end()) {
members[tok->str()] = ++(*_varId);
tok->varId(*_varId);
} else {
tok->varId(members[tok->str()]);
}
}
if (tok)
*tok1 = tok;
}
static void setVarIdClassDeclaration(Token * const startToken,
const std::map<std::string, unsigned int> &variableId,
const unsigned int scopeStartVarId,
std::map<unsigned int, std::map<std::string,unsigned int> > *structMembers,
unsigned int *_varId)
{
// 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 %type% [:{]")) {
className = tok->next()->str();
break;
}
}
// replace varids..
unsigned int indentlevel = 0;
bool initList = false;
for (Token *tok = startToken->next(); tok != endToken; tok = tok->next()) {
if (tok->str() == "{") {
initList = false;
++indentlevel;
} else if (tok->str() == "}")
--indentlevel;
else if (initList && indentlevel == 0 && Token::Match(tok->previous(), "[,:] %var% (")) {
const std::map<std::string, unsigned int>::const_iterator it = variableId.find(tok->str());
if (it != variableId.end()) {
tok->varId(it->second);
}
} else if (tok->isName() && tok->varId() <= scopeStartVarId) {
if (indentlevel > 0) {
if (Token::Match(tok->previous(), "::|."))
continue;
if (tok->next()->str() == "::") {
if (tok->str() == className)
tok = tok->tokAt(2);
else
continue;
}
const std::map<std::string, unsigned int>::const_iterator it = variableId.find(tok->str());
if (it != variableId.end()) {
tok->varId(it->second);
setVarIdStructMembers(&tok, structMembers, _varId);
}
}
} else if (indentlevel == 0 && tok->str() == ":")
initList = true;
}
}
// Update the variable ids..
// Parse each function..
static void setVarIdClassFunction(Token * const startToken,
const Token * const endToken,
const std::map<std::string, unsigned int> &varlist,
std::map<unsigned int, std::map<std::string,unsigned int> > *structMembers,
unsigned int *_varId)
{
for (Token *tok2 = startToken; tok2 && tok2 != endToken; tok2 = tok2->next()) {
if (tok2->varId() == 0 && (tok2->previous()->str() != "." || tok2->strAt(-2) == "this")) {
const std::map<std::string,unsigned int>::const_iterator it = varlist.find(tok2->str());
if (it != varlist.end()) {
tok2->varId(it->second);
setVarIdStructMembers(&tok2, structMembers, _varId);
}
}
}
}
static bool isInitList(const Token *tok)
{
if (!Token::Match(tok, ") : %var% ("))
return false;
tok = tok->linkAt(3);
while (Token::Match(tok, ") , %var% ("))
tok = tok->linkAt(3);
return Token::simpleMatch(tok, ") {");
}
void Tokenizer::setVarId()
{
// Clear all variable ids
for (Token *tok = list.front(); tok; tok = tok->next())
tok->varId(0);
// Variable declarations can't start with "return" etc.
std::set<std::string> notstart;
notstart.insert("goto");
notstart.insert("NOT");
notstart.insert("return");
notstart.insert("sizeof");
if (!isC()) {
static const char *str[] = {"delete","friend","new","throw","using","virtual","explicit"};
notstart.insert(str, str+(sizeof(str)/sizeof(*str)));
}
// variable id
_varId = 0;
std::map<std::string, unsigned int> variableId;
std::map<unsigned int, std::map<std::string, unsigned int> > structMembers;
std::stack< std::map<std::string, unsigned int> > scopeInfo;
std::stack<bool> executableScope;
executableScope.push(false);
std::stack<unsigned int> scopestartvarid; // varid when scope starts
scopestartvarid.push(0);
bool initlist = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
// scope info to handle shadow variables..
if (!initlist && tok->str() == "(" &&
(Token::simpleMatch(tok->link(), ") {") || Token::Match(tok->link(), ") %type% {") || isInitList(tok->link()))) {
scopeInfo.push(variableId);
initlist = Token::simpleMatch(tok->link(), ") :");
// function declarations
} else if (!executableScope.top() && tok->str() == "(" && Token::simpleMatch(tok->link(), ") ;")) {
scopeInfo.push(variableId);
} else if (!executableScope.top() && Token::simpleMatch(tok, ") ;")) {
variableId.swap(scopeInfo.top());
scopeInfo.pop();
} else if (tok->str() == "{") {
initlist = false;
// parse anonymous unions as part of the current scope
if (!(tok->strAt(-1) == "union" && Token::simpleMatch(tok->link(), "} ;"))) {
scopestartvarid.push(_varId);
if (tok->strAt(-1) == ")" || Token::Match(tok->tokAt(-2), ") %type%")) {
executableScope.push(true);
} else {
executableScope.push(executableScope.top());
scopeInfo.push(variableId);
}
}
} else if (tok->str() == "}") {
// parse anonymous unions as part of the current scope
if (!(Token::simpleMatch(tok, "} ;") && Token::simpleMatch(tok->link()->previous(), "union {"))) {
// Set variable ids in class declaration..
if (!isC() && !executableScope.top() && tok->link()) {
setVarIdClassDeclaration(tok->link(),
variableId,
scopestartvarid.top(),
&structMembers,
&_varId);
}
scopestartvarid.pop();
if (scopestartvarid.empty()) { // should be impossible
scopestartvarid.push(0);
}
if (scopeInfo.empty()) {
variableId.clear();
} else {
variableId.swap(scopeInfo.top());
scopeInfo.pop();
}
executableScope.pop();
if (executableScope.empty()) { // should not possibly happen
executableScope.push(false);
}
}
}
if (tok == list.front() || Token::Match(tok, "[;{}]") ||
(Token::Match(tok,"[(,]") && (!executableScope.top() || Token::simpleMatch(tok->link(), ") {"))) ||
(tok->isName() && tok->str().at(tok->str().length()-1U) == ':')) {
// 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 && tok2->str()[tok2->str().size() - 1U] == ':') {
tok2 = tok2->next();
}
if (!tok2)
break;
// Variable declaration can't start with "return", etc
if (notstart.find(tok2->str()) != notstart.end())
continue;
const bool decl = setVarIdParseDeclaration(&tok2, variableId, executableScope.top());
if (decl && Token::Match(tok2->previous(), "%type% [;[=,)]") && tok2->previous()->str() != "const") {
variableId[tok2->previous()->str()] = ++_varId;
tok = tok2->previous();
}
else if (decl && Token::Match(tok2->previous(), "%type% ( !!)") && Token::simpleMatch(tok2->link(), ") ;")) {
// In C++ , a variable can't be called operator+ or something like that.
if (isCPP() &&
tok2->previous()->str().size() >= 9 &&
tok2->previous()->str().compare(0, 8, "operator") == 0 &&
tok2->previous()->str()[8] != '_' &&
!std::isalnum(tok2->previous()->str()[8]))
continue;
const Token *tok3 = tok2->next();
if (!tok3->isStandardType() && tok3->str() != "void" && !Token::Match(tok3,"struct|union|class %type%") && tok3->str() != "." && !setVarIdParseDeclaration(&tok3,variableId,executableScope.top())) {
variableId[tok2->previous()->str()] = ++_varId;
tok = tok2->previous();
}
}
}
if (tok->isName()) {
// don't set variable id after a struct|enum|union
if (Token::Match(tok->previous(), "struct|enum|union"))
continue;
if (!isC()) {
if (tok->previous() && tok->previous()->str() == "::")
continue;
if (tok->next() && tok->next()->str() == "::")
continue;
}
const std::map<std::string, unsigned int>::const_iterator it = variableId.find(tok->str());
if (it != variableId.end()) {
tok->varId(it->second);
setVarIdStructMembers(&tok, &structMembers, &_varId);
}
} else if (Token::Match(tok, "::|. %var%")) {
// 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();
}
}
// Clear the structMembers because it will be used when member functions
// are parsed. The old info is not bad, it is just redundant.
structMembers.clear();
// Member functions and variables in this source
std::list<Token *> allMemberFunctions;
std::list<Token *> allMemberVars;
{
for (Token *tok2 = list.front(); tok2; tok2 = tok2->next()) {
if (Token::Match(tok2, "%var% :: %var%")) {
if (tok2->strAt(3) == "(")
allMemberFunctions.push_back(tok2);
else if (tok2->tokAt(2)->varId() != 0)
allMemberVars.push_back(tok2);
}
}
}
// class members..
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "class|struct %var% {|:")) {
const std::string &classname(tok->next()->str());
// What member variables are there in this class?
std::map<std::string, unsigned int> varlist;
const Token* tokStart = Token::findsimplematch(tok, "{");
if (tokStart) {
for (const Token *tok2 = tokStart->next(); tok2 != tokStart->link(); tok2 = tok2->next()) {
// skip parentheses..
if (tok2->str() == "{")
tok2 = tok2->link();
else if (tok2->str() == "(")
tok2 = tok2->link();
// Found a member variable..
else if (tok2->varId() > 0)
varlist[tok2->str()] = tok2->varId();
}
}
// Are there any member variables in this class?
if (varlist.empty())
continue;
// Member variables
for (std::list<Token *>::iterator func = allMemberVars.begin(); func != allMemberVars.end(); ++func) {
if (!Token::simpleMatch(*func, classname.c_str()))
continue;
Token *tok2 = *func;
tok2 = tok2->tokAt(2);
tok2->varId(varlist[tok2->str()]);
}
// Set variable ids in member functions for this class..
const std::string funcpattern(classname + " :: %var% (");
for (std::list<Token *>::iterator func = allMemberFunctions.begin(); func != allMemberFunctions.end(); ++func) {
Token *tok2 = *func;
// Found a class function..
if (Token::Match(tok2, funcpattern.c_str())) {
// Goto the end parentheses..
tok2 = tok2->linkAt(3);
if (!tok2)
break;
// If this is a function implementation.. add it to funclist
if (Token::Match(tok2, ") const|volatile| {")) {
while (tok2->str() != "{")
tok2 = tok2->next();
setVarIdClassFunction(tok2, tok2->link(), varlist, &structMembers, &_varId);
}
// constructor with initializer list
if (Token::Match(tok2, ") : %var% (")) {
Token *tok3 = tok2;
while (Token::Match(tok3, ") [:,] %var% (")) {
Token *vartok = tok3->tokAt(2);
if (varlist.find(vartok->str()) != varlist.end())
vartok->varId(varlist[vartok->str()]);
tok3 = tok3->linkAt(3);
}
if (Token::simpleMatch(tok3, ") {")) {
setVarIdClassFunction(tok2, tok3->next()->link(), varlist, &structMembers, &_varId);
}
}
}
}
}
}
}
static bool linkBrackets(Tokenizer* tokenizer, std::stack<const Token*>& type, std::stack<Token*>& links, Token* token, char open, 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->syntaxError(token, open);
return false;
}
if (type.top()->str()[0] != open) {
tokenizer->syntaxError(type.top(), type.top()->str()[0]);
return false;
}
type.pop();
Token::createMutualLinks(links.top(), token);
links.pop();
}
return (true);
}
bool Tokenizer::createLinks()
{
std::stack<const Token*> type;
std::stack<Token*> links1;
std::stack<Token*> links2;
std::stack<Token*> links3;
for (Token *token = list.front(); token; token = token->next()) {
if (token->link()) {
token->link(0);
}
bool validSyntax = linkBrackets(this, type, links1, token, '{', '}');
if (!validSyntax)
return false;
validSyntax = linkBrackets(this, type, links2, token, '(', ')');
if (!validSyntax)
return false;
validSyntax = linkBrackets(this, type, links3, token, '[', ']');
if (!validSyntax)
return false;
}
if (!links1.empty()) {
// Error, { and } don't match.
syntaxError(links1.top(), '{');
return false;
}
if (!links2.empty()) {
// Error, ( and ) don't match.
syntaxError(links2.top(), '(');
return false;
}
if (!links3.empty()) {
// Error, [ and ] don't match.
syntaxError(links3.top(), '[');
return false;
}
return true;
}
void Tokenizer::createLinks2()
{
if (isC())
return;
std::stack<Token*> type;
for (Token *token = list.front(); token; token = token->next()) {
if (token->link()) {
if (Token::Match(token, "{|[|("))
type.push(token);
else if (Token::Match(token, "}|]|)")) {
while (type.top()->str() == "<")
type.pop();
type.pop();
} else
token->link(0);
}
else if (token->str() == ";")
while (!type.empty() && type.top()->str() == "<")
type.pop();
else if (token->str() == "<" && token->previous() && token->previous()->isName() && !token->previous()->varId())
type.push(token);
else if (token->str() == ">" || token->str() == ">>") {
if (type.empty() || type.top()->str() != "<") // < and > don't match.
continue;
if (token->next() && !token->next()->isName() && !Token::Match(token->next(), ">|&|*|::|,|(|)"))
continue;
// Check type of open link
if (type.empty() || type.top()->str() != "<" || (token->str() == ">>" && type.size() < 2)) {
continue;
}
Token* top = type.top();
type.pop();
if (token->str() == ">>" && type.top()->str() != "<") {
type.push(top);
continue;
}
if (token->str() == ">>") { // C++11 right angle bracket
token->str(">");
token->insertToken(">");
}
Token::createMutualLinks(top, token);
}
}
}
bool Tokenizer::simplifySizeof()
{
// Locate variable declarations and calculate the size
std::map<unsigned int, std::string> sizeOfVar;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->varId() != 0 && sizeOfVar.find(tok->varId()) == sizeOfVar.end()) {
const unsigned int varId = tok->varId();
if (Token::Match(tok->tokAt(-3), "[;{}(,] %type% * %var% [;,)]") ||
Token::Match(tok->tokAt(-4), "[;{}(,] const %type% * %var% [;),]") ||
Token::Match(tok->tokAt(-2), "[;{}(,] %type% %var% [;),]") ||
Token::Match(tok->tokAt(-3), "[;{}(,] const %type% %var% [;),]")) {
const unsigned int size = sizeOfType(tok->previous());
if (size == 0) {
continue;
}
sizeOfVar[varId] = MathLib::longToString(size);
}
else if (Token::Match(tok->previous(), "%type% %var% [ %num% ] [;=]") ||
Token::Match(tok->tokAt(-2), "%type% * %var% [ %num% ] [;=]")) {
const unsigned int size = sizeOfType(tok->previous());
if (size == 0)
continue;
sizeOfVar[varId] = MathLib::longToString(size * static_cast<unsigned long>(MathLib::toLongNumber(tok->strAt(2))));
}
else if (Token::Match(tok->previous(), "%type% %var% [ %num% ] [,)]") ||
Token::Match(tok->tokAt(-2), "%type% * %var% [ %num% ] [,)]")) {
Token tempTok(0);
tempTok.str("*");
sizeOfVar[varId] = MathLib::longToString(sizeOfType(&tempTok));
}
}
}
bool ret = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() != "sizeof")
continue;
if (!tok->next())
break;
if (tok->strAt(1) == "sizeof")
continue;
if (Token::simpleMatch(tok->next(), ". . .")) {
tok->deleteNext(3);
}
// sizeof 'x'
if (tok->next()->type() == Token::eChar) {
tok->deleteThis();
std::ostringstream sz;
sz << sizeof 'x';
tok->str(sz.str());
ret = true;
continue;
}
// sizeof('x')
if (Token::Match(tok, "sizeof ( %char% )")) {
tok->deleteNext();
tok->deleteThis();
tok->deleteNext();
std::ostringstream sz;
sz << sizeof 'x';
tok->str(sz.str());
ret = true;
continue;
}
// sizeof "text"
if (tok->next()->type() == Token::eString) {
tok->deleteThis();
std::ostringstream ostr;
ostr << (Token::getStrLength(tok) + 1);
tok->str(ostr.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 * (...) -> sizeof(*...)
if (Token::simpleMatch(tok->next(), "* (") && !Token::simpleMatch(tok->linkAt(2), ") .")) {
tok->deleteNext();
tok->next()->insertToken("*");
}
// sizeof a++ -> sizeof(a++)
if (Token::Match(tok->next(), "++|-- %var% !!.") || Token::Match(tok->next(), "%var% ++|--")) {
tok->insertToken("(");
tok->tokAt(3)->insertToken(")");
Token::createMutualLinks(tok->next(), tok->tokAt(4));
}
// sizeof 1 => sizeof ( 1 )
if (tok->next()->isNumber()) {
Token *tok2 = tok->next();
tok->insertToken("(");
tok2->insertToken(")");
Token::createMutualLinks(tok->next(), tok2->next());
}
// sizeof int -> sizeof( int )
else if (tok->next()->str() != "(") {
// Add parentheses around the sizeof
int parlevel = 0;
for (Token *tempToken = tok->next(); tempToken; tempToken = tempToken->next()) {
if (tempToken->str() == "(")
++parlevel;
else if (tempToken->str() == ")")
--parlevel;
if (Token::Match(tempToken, "%var%")) {
while (tempToken && tempToken->next() && tempToken->next()->str() == "[") {
tempToken = tempToken->next()->link();
}
if (!tempToken || !tempToken->next()) {
break;
}
if (tempToken->next()->str() == ".") {
// We are checking a class or struct, search next varname
tempToken = tempToken->next();
continue;
} else if (tempToken->next()->type() == Token::eIncDecOp) {
// We have variable++ or variable--, there should be
// nothing after this
tempToken = tempToken->tokAt(2);
} else if (parlevel > 0 && Token::simpleMatch(tempToken->next(), ") .")) {
--parlevel;
tempToken = tempToken->tokAt(2);
continue;
}
// Ok, we should be clean. Add ) after tempToken
tok->insertToken("(");
tempToken->insertToken(")");
Token::createMutualLinks(tok->next(), tempToken->next());
break;
}
}
}
// sizeof(type *) => sizeof(*)
if (Token::Match(tok->next(), "( %type% * )")) {
tok->next()->deleteNext();
}
if (Token::simpleMatch(tok->next(), "( * )")) {
tok->str(MathLib::longToString(sizeOfType(tok->tokAt(2))));
tok->deleteNext(3);
ret = true;
}
// sizeof( a )
else if (Token::Match(tok->next(), "( %var% )") && tok->tokAt(2)->varId() != 0) {
if (sizeOfVar.find(tok->tokAt(2)->varId()) != sizeOfVar.end()) {
tok->deleteNext();
tok->deleteThis();
tok->deleteNext();
tok->str(sizeOfVar[tok->varId()]);
ret = true;
} else {
// don't try to replace size of variable if variable has
// similar name with type (#329)
}
}
else if (Token::Match(tok, "sizeof ( %type% )")) {
unsigned int size = sizeOfType(tok->tokAt(2));
if (size > 0) {
tok->str(MathLib::longToString(size));
tok->deleteNext(3);
ret = true;
}
}
else if (Token::Match(tok, "sizeof ( * %var% )") || Token::Match(tok, "sizeof ( %var% [ %num% ] )")) {
// Some default value..
std::size_t sz = 0;
unsigned int varid = tok->tokAt((tok->strAt(2) == "*") ? 3 : 2)->varId();
if (varid != 0) {
// Try to locate variable declaration..
const Token *decltok = Token::findmatch(list.front(), "%varid%", varid);
if (Token::Match(decltok->previous(), "%type% %var% [")) {
sz = sizeOfType(decltok->previous());
} else if (Token::Match(decltok->previous(), "* %var% [")) {
sz = sizeOfType(decltok->previous());
} else if (Token::Match(decltok->tokAt(-2), "%type% * %var%")) {
sz = sizeOfType(decltok->tokAt(-2));
}
} else if (tok->strAt(3) == "[" && tok->tokAt(2)->isStandardType()) {
sz = sizeOfType(tok->tokAt(2));
if (sz == 0)
continue;
sz *= static_cast<unsigned long>(MathLib::toLongNumber(tok->strAt(4)));
}
if (sz > 0) {
tok->str(MathLib::longToString(sz));
Token::eraseTokens(tok, tok->next()->link()->next());
ret = true;
}
}
}
return ret;
}
bool Tokenizer::simplifyTokenList()
{
// clear the _functionList so it can't contain dead pointers
deleteSymbolDatabase();
simplifyCharAt();
// simplify references
simplifyReference();
simplifyStd();
simplifyGoto();
if (_settings && _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();
// Replace constants..
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "const static| %type% %var% = %num% ;") ||
Token::Match(tok, "const static| %type% %var% ( %num% ) ;")) {
unsigned int offset = 0;
if (tok->strAt(1) == "static")
offset = 1;
const unsigned int varId(tok->tokAt(2 + offset)->varId());
if (varId == 0) {
tok = tok->tokAt(5 + offset);
continue;
}
const std::string& num = tok->strAt(4 + offset);
int indent = 1;
for (Token *tok2 = tok->tokAt(6); tok2; tok2 = tok2->next()) {
if (tok2->str() == "{") {
++indent;
} else if (tok2->str() == "}") {
--indent;
if (indent == 0)
break;
}
// Compare constants, but don't touch members of other structures
else if (tok2->varId() == varId) {
tok2->str(num);
}
}
}
}
if (_settings && _settings->terminated())
return false;
// Simplify simple calculations..
simplifyCalculations();
// Replace "*(ptr + num)" => "ptr[num]"
simplifyOffsetPointerDereference();
// Replace "&str[num]" => "(str + num)"
std::set<unsigned int> 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%|%var%") && !Token::Match(tok, "]|)") &&
(Token::Match(tok->next(), "& %var% [ %num%|%var% ]"))) {
tok = tok->next();
if (tok->next()->varId()) {
if (pod.find(tok->next()->varId()) == pod.end()) {
tok = tok->tokAt(5);
continue;
}
}
// '&' => '('
tok->str("(");
tok = tok->next();
// '[' => '+'
tok->deleteNext();
tok->insertToken("+");
tok = tok->tokAt(3);
//remove ']'
tok->str(")");
Token::createMutualLinks(tok->tokAt(-4), tok);
}
}
removeRedundantAssignment();
simplifyRealloc();
// Change initialisation of variable to assignment
simplifyInitVar();
// Simplify variable declarations
simplifyVarDecl(false);
elseif();
simplifyErrNoInWhile();
simplifyIfAndWhileAssign();
simplifyRedundantParentheses();
simplifyIfNot();
simplifyIfNotNull();
simplifyIfSameInnerCondition();
simplifyComparisonOrder();
simplifyNestedStrcat();
simplifyWhile0();
simplifyFuncInWhile();
simplifyIfAndWhileAssign(); // Could be affected by simplifyIfNot
bool modified = true;
while (modified) {
if (_settings && _settings->terminated())
return false;
modified = false;
modified |= simplifyConditions();
modified |= simplifyFunctionReturn();
modified |= simplifyKnownVariables();
// replace strlen(str)
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "strlen ( %str% )")) {
tok->str(MathLib::longToString(Token::getStrLength(tok->tokAt(2))));
tok->deleteNext(3);
modified = true;
}
}
modified |= removeRedundantConditions();
modified |= simplifyRedundantParentheses();
modified |= simplifyConstTernaryOp();
modified |= simplifyCalculations();
}
simplifyConditionOperator();
// simplify redundant for
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();
if (!validate())
return false;
list.front()->assignProgressValues();
// Create symbol database and then remove const keywords
createSymbolDatabase();
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok, "* const"))
tok->deleteNext();
}
if (_settings->terminated())
return false;
if (_settings->debug) {
list.front()->printOut(0, list.getFiles());
if (_settings->_verbose)
_symbolDatabase->printOut("Symbol database");
}
if (_settings->debugwarnings) {
printUnknownTypes();
}
return true;
}
//---------------------------------------------------------------------------
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"))
tok->deleteNext();
}
if ((!tok->previous() || Token::Match(tok->previous(), "[;{}]")) &&
Token::Match(tok, "%type%") && tok->isUpperCaseName()) {
const Token *tok2 = tok->next();
if (tok2 && tok2->str() == "(")
tok2 = tok2->link()->next();
// 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% (") && Token::Match(tok2->next()->link(), ") const| {")) {
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;
}
}
if (tok->str() == "{")
tok = tok->link();
}
}
//---------------------------------------------------------------------------
void Tokenizer::removeMacroInVarDecl()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "[;{}] %var% (") && 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() : NULL;
// 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::removeRedundantAssignment()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "{")
tok = tok->link();
if (Token::Match(tok, ") const| {")) {
// parse in this function..
std::set<unsigned int> localvars;
if (tok->next()->str() == "const")
tok = tok->next();
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 '{'
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% * %var% ;") && tok2->next()->str() != "return") {
tok2 = tok2->tokAt(3);
localvars.insert(tok2->varId());
} else if (Token::Match(tok2, "[;{}] %type% %var% ;") && tok2->next()->isStandardType()) {
tok2 = tok2->tokAt(2);
localvars.insert(tok2->varId());
} else if (tok2->varId() &&
!Token::Match(tok2->previous(), "[;{}] %var% = %char%|%num%|%var% ;")) {
localvars.erase(tok2->varId());
}
}
localvars.erase(0);
if (!localvars.empty()) {
for (Token *tok2 = tok->next(); tok2 && tok2 != end;) {
if (Token::Match(tok2, "[;{}] %type% %var% ;") && localvars.find(tok2->tokAt(2)->varId()) != localvars.end()) {
tok2->deleteNext(3);
} else if ((Token::Match(tok2, "[;{}] %type% * %var% ;") &&
localvars.find(tok2->tokAt(3)->varId()) != localvars.end()) ||
(Token::Match(tok2, "[;{}] %var% = %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 (tok->str() == "(" || tok->str() == "[" ||
(tok->str() == "{" && tok->previous() && tok->previous()->str() == "="))
tok = tok->link();
else if (Token::Match(tok, "[;{}] %var% = 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() : NULL) {
if (goback) {
tok = tok->previous();
goback = false;
}
if (tok->str() == "(" || tok->str() == "[" || tok->str() == "{") {
tok = tok->link();
continue;
}
if (!Token::Match(tok, "namespace %var% {"))
continue;
if (tok->strAt(3) == "}") {
tok->deleteNext(3); // remove '%var% { }'
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'
}
} else {
tok = tok->tokAt(2);
}
}
}
void Tokenizer::simplifyFlowControl()
{
for (Token *begin = list.front(); begin; begin = begin->next()) {
if (begin->str() == "(" || begin->str() == "[" ||
(begin->str() == "{" && begin->previous() && begin->strAt(-1) == "="))
begin = begin->link();
//function scope
if (!Token::simpleMatch(begin, ") {") && !Token::Match(begin, ") %var% {"))
continue;
Token *end = begin->linkAt(1+(begin->next()->str() == "{" ? 0 : 1));
unsigned int indentlevel = 0;
bool stilldead = false;
for (Token *tok = begin; tok != end; tok = tok->next()) {
if (tok->str() == "(" || tok->str() == "[") {
tok = tok->link();
continue;
}
if (tok->str() == "{") {
if (tok->previous() && tok->previous()->str() == "=") {
tok = tok->link();
continue;
}
++indentlevel;
} else if (tok->str() == "}") {
if (!indentlevel)
break;
--indentlevel;
if (stilldead) {
eraseDeadCode(tok, 0);
if (indentlevel == 1 || tok->next()->str() != "}" || !Token::Match(tok->next()->link()->previous(), ";|{|}|do {"))
stilldead = false;
continue;
}
}
if (!indentlevel)
continue;
if (Token::Match(tok,"continue|break ;")) {
tok = tok->next();
eraseDeadCode(tok, 0);
} else if (Token::Match(tok,"return|goto") ||
Token::Match(tok,"exit|abort") ||
(tok->str() == "throw" && !isC())) {
//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 (tok2->str() == "(" || tok2->str() == "[") {
tok2 = tok2->link();
} else if (tok2->str() == ";") {
tok = tok2;
eraseDeadCode(tok, 0);
break;
} else if (Token::Match(tok2, "[{}]"))
break; //Wrong code.
}
//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 (tok->str() != "if")
continue;
if (!Token::Match(tok->next(), "( %bool% ) {"))
continue;
// Find matching else
Token *elseTag = tok->linkAt(4)->next();
bool boolValue = (tok->strAt(2) == "true");
// Handle if with else
if (Token::simpleMatch(elseTag, "else {")) {
// Handle else
if (boolValue == false) {
// 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 == false) {
//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 ( %var% = %num% ; %var% < %num% ; ++| %var% ++| ) {")) {
// Same variable name..
const std::string varname(tok->strAt(3));
const unsigned int varid(tok->tokAt(3)->varId());
if (varname != tok->strAt(7))
continue;
const Token *vartok = tok->tokAt(11);
if (vartok->str() == "++")
vartok = vartok->next();
if (varname != vartok->str())
continue;
// Check that the difference of the numeric values is 1
const MathLib::bigint num1(MathLib::toLongNumber(tok->strAt(5)));
const MathLib::bigint num2(MathLib::toLongNumber(tok->strAt(9)));
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) {
// remove "for ("
tok->deleteNext(2);
// If loop variable is read then keep assignment before
// loop body..
if (read) {
// goto ";"
tok = tok->tokAt(4);
} else {
// remove "x = 0 ;"
tok->deleteNext(4);
}
// remove "x < 1 ; x ++ )"
tok->deleteNext(7);
// 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::longToString(num2));
tok2->insertToken("=");
tok2->insertToken(varname);
tok2->next()->varId(varid);
}
}
}
}
void Tokenizer::removeRedundantSemicolons()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(") {
tok = tok->link();
}
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 (tok->str()=="for" ||
tok->str()=="BOOST_FOREACH" ||
tok->str()=="switch") {
tokEnd=simplifyAddBracesPair(tok,true);
} else if (tok->str()=="while") {
Token *tokPossibleDo=tok->previous();
if (tokPossibleDo &&
tokPossibleDo->str()=="}")
tokPossibleDo=tokPossibleDo->link();
if (tokPossibleDo)
tokPossibleDo=tokPossibleDo->previous();
if (!tokPossibleDo ||
tokPossibleDo->str()!="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) {
// no while return input token
syntaxError(tok);
return NULL;
}
}
}
} else if (tok->str()=="if") {
tokEnd=simplifyAddBracesPair(tok,true);
if (!tokEnd)
return NULL;
Token * tokEndNext=tokEnd->next();
if (tokEndNext && tokEndNext->str()=="else") {
Token * tokEndNextNext=tokEndNext->next();
if (tokEndNextNext && tokEndNextNext->str()=="if") {
// do not change "else if ..." to "else { if ... }"
tokEnd=simplifyAddBracesToCommand(tokEndNextNext);
} else
tokEnd=simplifyAddBracesPair(tokEndNext,false);
}
}
return tokEnd;
}
Token *Tokenizer::simplifyAddBracesPair(Token *tok, bool commandWithCondition)
{
Token * tokCondition=tok->next();
Token *tokAfterCondition=tokCondition;
if (commandWithCondition) {
if (!tokCondition) {
// Missing condition
return tok;
}
if (tokCondition->str()=="(")
tokAfterCondition=tokCondition->link();
else
tokAfterCondition=NULL;
if (!tokAfterCondition) {
// Bad condition
syntaxError(tok);
return NULL;
}
tokAfterCondition=tokAfterCondition->next();
}
if (!tokAfterCondition ||
((tokAfterCondition->type()==Token::eBracket ||
tokAfterCondition->type()==Token::eExtendedOp)&&
Token::Match(tokAfterCondition,")|}|>|,"))) {
// No tokens left where to add braces around
return tok;
}
Token * tokBracesEnd=NULL;
if (tokAfterCondition->str()=="{") {
// already surrounded by braces
tokBracesEnd=tokAfterCondition->link();
} else {
Token * tokEnd = simplifyAddBracesToCommand(tokAfterCondition);
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 &&
tokEnd->str()!=";" &&
!((tokEnd->type()==Token::eBracket ||
tokEnd->type()==Token::eExtendedOp)&&
Token::Match(tokEnd,")|}|>"))) {
if (tokEnd->type()==Token::eBracket ||
(tokEnd->type()==Token::eExtendedOp && tokEnd->str()=="(")) {
Token *tokInnerCloseBraket=tokEnd->link();
if (!tokInnerCloseBraket) {
// Inner bracket does not close
return tok;
}
tokEnd=tokInnerCloseBraket;
}
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, "[;{}] (| *| (| %var%")) {
// 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, ". %var%") ||
Token::Match(tok, "[|(")) {
if (tok->str() == ".")
tok = tok->tokAt(2);
else {
// goto "]" or ")"
tok = tok->link();
// goto next token..
tok = tok ? tok->next() : 0;
}
}
}
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::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->str() == "(")
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<Token *> 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->type() == 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();
}
}
}
}
}
}
void Tokenizer::simplifyConditionOperator()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(" || tok->str() == "[" ||
(tok->str() == "{" && tok->previous() && tok->previous()->str() == "="))
tok = tok->link();
if (Token::Match(tok, "[{};] *| %var% = %any% ? %any% : %any% ;") ||
Token::Match(tok, "[{};] return %any% ? %any% : %any% ;")) {
// backup varids so they can be set properly
std::map<std::string, unsigned int> varid;
for (const Token *tok2 = tok->next(); tok2->str() != ";"; tok2 = tok2->next()) {
if (tok2->varId())
varid[tok2->str()] = tok2->varId();
}
std::string var(tok->next()->str());
bool isPointer = false;
bool isReturn = false;
if (tok->next()->str() == "*") {
tok = tok->next();
var = tok->next()->str();
isPointer = true;
} else if (tok->next()->str() == "return") {
isReturn = true;
}
Token *tok2 = tok->tokAt(3 - (isReturn ? 1 : 0));
if (!tok2->isName() && !tok2->isNumber() && tok2->str()[0] != '\"')
continue;
const std::string condition(tok2->str());
tok2 = tok2->tokAt(2);
if (!tok2->isName() && !tok2->isNumber() && tok2->str()[0] != '\"')
continue;
const std::string value1(tok2->str());
tok2 = tok2->tokAt(2);
if (!tok2->isName() && !tok2->isNumber() && tok2->str()[0] != '\"')
continue;
const std::string value2(tok2->str());
if (isPointer) {
tok = tok->previous();
tok->deleteNext(9);
} else if (isReturn)
tok->deleteNext(6);
else
tok->deleteNext(8);
Token *starttok = 0;
std::string str;
if (isReturn)
str = "if ( condition ) { return value1 ; } return value2 ;";
else
str = "if ( condition ) { * var = value1 ; } else { * var = value2 ; }";
std::string::size_type pos1 = 0;
while (pos1 != std::string::npos) {
if (str[pos1] == '*') {
pos1 += 2;
if (isPointer) {
tok->insertToken("*");
tok = tok->next();
}
}
std::string::size_type pos2 = str.find(" ", pos1);
if (pos2 == std::string::npos) {
tok->insertToken(str.substr(pos1));
pos1 = pos2;
} else {
tok->insertToken(str.substr(pos1, pos2 - pos1));
pos1 = pos2 + 1;
}
tok = tok->next();
// set links.
if (tok->str() == "(" || tok->str() == "{")
starttok = tok;
else if (starttok && (tok->str() == ")" || tok->str() == "}")) {
Token::createMutualLinks(starttok, tok);
starttok = 0;
} else if (tok->str() == "condition")
tok->str(condition);
else if (tok->str() == "var")
tok->str(var);
else if (tok->str() == "value1")
tok->str(value1);
else if (tok->str() == "value2")
tok->str(value2);
// set varid.
if (varid.find(tok->str()) != varid.end())
tok->varId(varid[tok->str()]);
}
}
}
}
bool Tokenizer::simplifyConditions()
{
bool ret = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "! %bool%|%num%")) {
tok->deleteThis();
if (tok->str() == "0" || tok->str() == "false")
tok->str("true");
else
tok->str("false");
ret = true;
}
if (Token::simpleMatch(tok, "( true &&") ||
Token::simpleMatch(tok, "&& true &&") ||
Token::simpleMatch(tok->next(), "&& true )")) {
tok->deleteNext(2);
ret = true;
}
else if (Token::simpleMatch(tok, "( false ||") ||
Token::simpleMatch(tok, "|| false ||") ||
Token::simpleMatch(tok->next(), "|| false )")) {
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->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);
if (cmp == "==")
result = eq;
else
result = !eq;
} else {
double op1 = MathLib::toDoubleNumber(tok->next()->str());
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 = "";
}
} else {
// Compare boolean
bool op1 = (tok->next()->str() == std::string("true"));
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 = "";
}
if (! cmp.empty()) {
tok = tok->next();
tok->deleteNext(2);
tok->str(result ? "true" : "false");
ret = true;
}
}
}
return ret;
}
bool Tokenizer::simplifyConstTernaryOp()
{
bool ret = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
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) == "<" && !TemplateSimplifier::templateParameters(tok->tokAt(-2*offset)))
continue;
// Find the token ":" then go to the next token
Token *semicolon = skipTernaryOp(tok);
if (!semicolon || semicolon->previous()->str() != ":" || !semicolon->next())
continue;
//handle the GNU extension: "x ? : y" <-> "x ? x : y"
if (semicolon->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 (tok->next()->str() == "false" || tok->next()->str() == "0") {
// Use code after semicolon, remove code before it.
Token::eraseTokens(tok, semicolon);
tok = tok->next();
ret = true;
}
// The condition is true. Delete the operator after the ":"..
else {
// delete the condition token and the "?"
tok->deleteNext(2);
unsigned int ternaryOplevel = 0;
for (const Token *endTok = semicolon; endTok; endTok = endTok->next()) {
if (endTok->str() == "(" || endTok->str() == "[" || endTok->str() == "{") {
endTok = endTok->link();
}
else if (endTok->str() == "?")
++ternaryOplevel;
else if (Token::Match(endTok, ")|}|]|;|,|:")) {
if (endTok->str() == ":" && ternaryOplevel)
--ternaryOplevel;
else {
Token::eraseTokens(semicolon->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, "%var% [ ]"))
continue;
tok = tok2->previous();
Token *end = tok2->next();
unsigned int count = 0;
while (Token::Match(end, "[ ] [;=[]")) {
end = end->tokAt(2);
++count;
}
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()) {
// #2897 : don't remove cast in such cases:
// *((char *)a + 1) = 0;
// #3596 : remove cast when casting a function pointer:
// (*(void (*)(char *))fp)(x);
if (!tok->isName() &&
Token::simpleMatch(tok->next(), "* (") &&
!Token::Match(tok->linkAt(2), ") %var%") &&
!Token::simpleMatch(tok->linkAt(2), ") &")) {
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(), "( unsigned| %type% ) %num%") && tok->next()->link()->previous()->isStandardType()) {
const MathLib::bigint value = MathLib::toLongNumber(tok->next()->link()->next()->str());
unsigned int bits = 8 * _typeSize[tok->next()->link()->previous()->str()];
if (!tok->tokAt(2)->isUnsigned())
bits--;
if (bits < 31 && value >= 0 && value < (1LL << bits)) {
Token::eraseTokens(tok, tok->next()->link()->next());
}
continue;
}
while ((Token::Match(tok->next(), "( %type% *| *| *| ) *|&| %var%") && (tok->str() != ")" || tok->tokAt(2)->isStandardType())) ||
Token::Match(tok->next(), "( %type% %type% *| *| *| ) *|&| %var%") ||
(!tok->isName() && (Token::Match(tok->next(), "( %type% * *| *| ) (") ||
Token::Match(tok->next(), "( %type% %type% * *| *| ) (")))) {
if (tok->isName() && tok->str() != "return")
break;
if (tok->strAt(-1) == "operator")
break;
// Remove cast..
Token::eraseTokens(tok, tok->next()->link()->next());
// 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% * ) 0") ||
Token::Match(tok->next(), "( %type% %type% * ) 0")) {
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();
}
}
while (Token::Match(tok->next(), "dynamic_cast|reinterpret_cast|const_cast|static_cast <")) {
Token *tok2 = tok->linkAt(2);
if (Token::simpleMatch(tok2, "> (")) {
Token *closeBracket = tok2->next()->link();
if (closeBracket) {
Token::eraseTokens(tok, tok2->tokAt(2));
closeBracket->deleteThis();
} else {
break;
}
} else {
break;
}
}
}
}
bool Tokenizer::simplifyFunctionParameters()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "{" || tok->str() == "[" || tok->str() == "(") {
tok = tok->link();
}
// Find the function e.g. foo( x ) or foo( x, y )
else if (Token::Match(tok, "%var% ( %var% [,)]") &&
!(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<std::string, Token *> argumentNames;
bool bailOut = false;
Token * tokparam = NULL;
//take count of the function name..
const std::string& funcName(tok->str());
//floating token used to check for parameters
Token *tok1 = tok;
while (NULL != (tok1 = tok1->tokAt(2))) {
if (!Token::Match(tok1, "%var% [,)]")) {
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<std::string, Token *> argumentNames2;
while (tok1 && tok1->str() != "{") {
if (tok1->str() == "(" || tok1->str() == ")") {
bailOut = true;
break;
}
if (tok1->str() == ";") {
if (tokparam) {
syntaxError(tokparam);
return false;
}
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);
return false;
} 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();
std::map<std::string, Token *>::iterator it;
for (it = argumentNames.begin(); it != argumentNames.end(); ++it) {
if (argumentNames2.find(it->first) == argumentNames2.end()) {
//add the missing parameter argument declaration
tok1->insertToken(";");
tok1->insertToken(it->first);
//register the change inside argumentNames2
argumentNames2[it->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();
}
//goto forward and continue
tok = tok->next()->link();
}
}
return true;
}
void Tokenizer::simplifyPointerToStandardType()
{
if (!isC())
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (!Token::Match(tok, "& %var% [ 0 ]"))
continue;
// Remove '[ 0 ]' suffix
tok->next()->eraseTokens(tok->next(), tok->tokAt(5));
// Remove '&' prefix
tok = tok->previous();
tok->deleteNext();
}
}
void Tokenizer:: simplifyFunctionPointers()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
// #2873 - dont 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% *| *| ( * ) (") ||
Token::Match(tok, "( %type% %type% *| *| ( * ) (") ||
Token::Match(tok, "static_cast < %type% *| *| ( * ) (") ||
Token::Match(tok, "static_cast < %type% %type% *| *| ( * ) (")) {
Token *tok1 = tok;
if (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, "%type% *| *| ( * %var% [| ]| ) ("))
;
else if (Token::Match(tok, "%type% %type% *| *| ( * %var% [| ]| ) ("))
tok = tok->next();
else
continue;
while (tok->next()->str() == "*")
tok = tok->next();
// check that the declaration ends
const Token *endTok = tok->next()->link()->next()->link();
if (!Token::Match(endTok, ") ;|,|)|=|["))
continue;
// ok simplify this function pointer to an ordinary pointer
Token::eraseTokens(tok->next()->link(), endTok->next());
tok->next()->link()->deleteThis();
tok->deleteNext();
}
}
bool Tokenizer::simplifyFunctionReturn()
{
bool ret = false;
for (const Token *tok = tokens(); tok; tok = tok->next()) {
if (tok->str() == "{")
tok = tok->link();
else if (Token::Match(tok, "%var% ( ) { return %bool%|%char%|%num%|%str% ; }")) {
const Token* const any = tok->tokAt(5);
const std::string pattern("(|[|=|%cop% " + tok->str() + " ( ) ;|]|)|%cop%");
for (Token *tok2 = list.front(); tok2; tok2 = tok2->next()) {
if (Token::Match(tok2, pattern.c_str())) {
tok2 = tok2->next();
tok2->str(any->str());
tok2->deleteNext(2);
ret = true;
}
}
}
}
return ret;
}
static void incdec(std::string &value, const std::string &op)
{
int ivalue = 0;
std::istringstream istr(value);
istr >> ivalue;
if (op == "++")
++ivalue;
else if (op == "--")
--ivalue;
std::ostringstream ostr;
ostr << ivalue;
value = ostr.str();
}
void Tokenizer::simplifyVarDecl(bool only_k_r_fpar)
{
simplifyVarDecl(list.front(), NULL, only_k_r_fpar);
}
void Tokenizer::simplifyVarDecl(Token * tokBegin, Token * tokEnd, bool only_k_r_fpar)
{
// Split up variable declarations..
// "int a=4;" => "int a; a=4;"
bool finishedwithkr = true;
for (Token *tok = tokBegin; tok != tokEnd; tok = tok->next()) {
if (Token::simpleMatch(tok, "= {")) {
tok = tok->next()->link();
}
if (only_k_r_fpar && finishedwithkr) {
if (tok->str() == "(" || tok->str() == "[" || tok->str() == "{") {
tok = tok->link();
if (tok->next() && Token::Match(tok, ") !!{"))
tok = tok->next();
else
continue;
} else
continue;
} else if (tok->str() == "(") {
for (Token * tok2 = tok; tok2 != tok->link(); tok2 = tok2->next()) {
if (isCPP() && 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->previous() && !Token::Match(tok->previous(), "{|}|;|)|public:|protected:|private:"))
continue;
Token *type0 = tok;
if (!Token::Match(type0, "::| %type%"))
continue;
if (Token::Match(type0, "else|return|public:|protected:|private:"))
continue;
bool isconst = false;
bool isstatic = false;
Token *tok2 = type0;
unsigned int typelen = 1;
if (tok2->str() == "::") {
tok2 = tok2->next();
typelen++;
}
//check if variable is declared 'const' or 'static' or both
while (tok2) {
if (!Token::Match(tok2, "const|static") && Token::Match(tok2, "%type% const|static")) {
tok2 = tok2->next();
++typelen;
}
if (tok2->str() == "const")
isconst = true;
else if (tok2->str() == "static")
isstatic = true;
else if (Token::Match(tok2, "%type% :: %type%")) {
tok2 = tok2->next();
++typelen;
}
else
break;
if (tok2->strAt(1) == "*")
break;
tok2 = tok2->next();
++typelen;
}
// strange looking variable declaration => don't split up.
if (Token::Match(tok2, "%type% *| %var% , %type% *| %var%"))
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 (Token::Match(tok2, "%type% <") || Token::Match(tok2, "%type% ::")) {
if (tok2->next()->str() == "<" && !TemplateSimplifier::templateParameters(tok2->next())) {
tok2 = NULL;
break;
}
typelen += 2;
tok2 = tok2->tokAt(2);
if (tok2 && tok2->previous()->str() == "::")
continue;
unsigned int indentlevel = 0;
unsigned int parens = 0;
for (Token *tok3 = tok2; tok3; tok3 = tok3->next()) {
++typelen;
if (tok3->str() == "<" && !parens) {
++indentlevel;
} else if (tok3->str() == ">" && !parens) {
if (indentlevel == 0) {
tok2 = tok3->next();
break;
}
--indentlevel;
} else if (tok3->str() == ">>" && !parens) {
if (indentlevel <= 1U) {
tok2 = tok3->next();
break;
}
indentlevel -= 2;
} else if (tok3->str() == "(") {
++parens;
} else if (tok3->str() == ")") {
if (!parens) {
tok2 = NULL;
break;
}
--parens;
} else if (tok3->str() == ";") {
break;
}
}
if (Token::Match(tok2, ":: %type%")) {
++typelen;
tok2 = tok2->next();
}
}
//pattern: "%type% *| ... *| const| %var% ,|="
if (Token::Match(tok2, "%type%") ||
(tok2 && tok2->previous() && tok2->previous()->str() == ">")) {
bool ispointer = false;
Token *varName = tok2;
if (!tok2->previous() || tok2->previous()->str() != ">")
varName = varName->next();
else
--typelen;
//skip all the pointer part
while (varName && varName->str() == "*") {
ispointer = true;
varName = varName->next();
}
while (Token::Match(varName, "%type% %type%")) {
if (varName->str() != "const") {
++typelen;
}
varName = varName->next();
}
//non-VLA case
if (Token::Match(varName, "%var% ,|=")) {
if (varName->str() != "operator") {
tok2 = varName->next(); // The ',' or '=' token
if (tok2->str() == "=") {
if (isstatic) {
if (Token::Match(tok2->next(), "%num% ,"))
tok2 = tok2->tokAt(2);
else
tok2 = NULL;
} else if (isconst && !ispointer) {
//do not split const non-pointer variables..
while (tok2 && tok2->str() != "," && tok2->str() != ";") {
if (tok2->str() == "{" || tok2->str() == "(" || tok2->str() == "[")
tok2 = tok2->link();
if (tok2->str() == "<" && TemplateSimplifier::templateParameters(tok2) > 0)
tok2 = tok2->findClosingBracket();
tok2 = tok2->next();
}
if (tok2 && tok2->str() == ";")
tok2 = NULL;
}
}
} else
tok2 = NULL;
}
//VLA case
else if (Token::Match(varName, "%var% [")) {
tok2 = varName->next();
while (Token::Match(tok2->link(), "] ,|=|["))
tok2 = tok2->link()->next();
if (!Token::Match(tok2, "=|,"))
tok2 = NULL;
if (tok2 && tok2->str() == "=") {
while (tok2 && tok2->str() != "," && tok2->str() != ";") {
if (tok2->str() == "{" || tok2->str() == "(" || tok2->str() == "[")
tok2 = tok2->link();
tok2 = tok2->next();
}
if (tok2 && tok2->str() == ";")
tok2 = NULL;
}
} else
tok2 = NULL;
} else {
tok2 = NULL;
}
if (!tok2) {
if (only_k_r_fpar)
finishedwithkr = false;
continue;
}
if (tok2->str() == ",") {
tok2->str(";");
//TODO: should we have to add also template '<>' links?
list.insertTokens(tok2, type0, typelen);
}
else {
Token *eq = tok2;
while (tok2) {
if (tok2->str() == "{" || tok2->str() == "(")
tok2 = tok2->link();
else if (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((int)typelen);
while (Token::Match(VarTok, "*|&|const"))
VarTok = VarTok->next();
list.insertTokens(eq, VarTok, 2);
eq->str(";");
// "= x, " => "= x; type "
if (tok2->str() == ",") {
tok2->str(";");
list.insertTokens(tok2, type0, typelen);
}
break;
}
tok2 = tok2->next();
}
}
finishedwithkr = (only_k_r_fpar && tok2 && tok2->strAt(1) == "{");
}
}
void Tokenizer::simplifyPlatformTypes()
{
enum { isLongLong, isLong, isInt } type;
/** @todo This assumes a flat address space. Not true for segmented address space (FAR *). */
if (_settings->sizeof_size_t == 8)
type = isLongLong;
else if (_settings->sizeof_size_t == 4 && _settings->sizeof_long == 4)
type = isLong;
else if (_settings->sizeof_size_t == 4)
type = isInt;
else
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "std :: size_t|ssize_t|ptrdiff_t|intptr_t|uintptr_t")) {
tok->deleteNext();
tok->deleteThis();
} else if (Token::Match(tok, ":: size_t|ssize_t|ptrdiff_t|intptr_t|uintptr_t")) {
tok->deleteThis();
}
if (Token::Match(tok, "size_t|uintptr_t")) {
tok->str("unsigned");
switch (type) {
case isLongLong:
tok->insertToken("long");
tok->insertToken("long");
break;
case isLong :
tok->insertToken("long");
break;
case isInt:
tok->insertToken("int");
break;
}
} else if (Token::Match(tok, "ssize_t|ptrdiff_t|intptr_t")) {
switch (type) {
case isLongLong:
tok->str("long");
tok->insertToken("long");
break;
case isLong :
tok->str("long");
break;
case isInt:
tok->str("int");
break;
}
}
}
if (_settings->platformType == Settings::Win32A ||
_settings->platformType == Settings::Win32W ||
_settings->platformType == Settings::Win64) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "BOOL|INT|INT32|HFILE|LONG32"))
tok->str("int");
else if (Token::Match(tok, "BOOLEAN|BYTE|UCHAR")) {
tok->str("unsigned");
tok->insertToken("char");
} else if (tok->str() == "CHAR")
tok->str("char");
else if (Token::Match(tok, "DWORD|ULONG|COLORREF|LCID|LCTYPE|LGRPID")) {
tok->str("unsigned");
tok->insertToken("long");
} else if (Token::Match(tok, "DWORD_PTR|ULONG_PTR|SIZE_T")) {
tok->str("unsigned");
tok->insertToken("long");
if (_settings->platformType == Settings::Win64)
tok->insertToken("long");
} else if (tok->str() == "FLOAT")
tok->str("float");
else if (Token::Match(tok, "HRESULT|LONG"))
tok->str("long");
else if (Token::Match(tok, "INT64|LONG64")) {
tok->str("long");
tok->insertToken("long");
} else if (Token::Match(tok, "LONG_PTR|LPARAM|LRESULT|SSIZE_T")) {
tok->str("long");
if (_settings->platformType == Settings::Win64)
tok->insertToken("long");
} else if (Token::Match(tok, "LPBOOL|PBOOL")) {
tok->str("int");
tok->insertToken("*");
} else if (Token::Match(tok, "LPBYTE|PBOOLEAN|PBYTE|PUCHAR")) {
tok->str("unsigned");
tok->insertToken("*");
tok->insertToken("char");
} else if (Token::Match(tok, "LPCSTR|PCSTR")) {
tok->str("const");
tok->insertToken("*");
tok->insertToken("char");
} else if (tok->str() == "LPCVOID") {
tok->str("const");
tok->insertToken("*");
tok->insertToken("void");
} else if (Token::Match(tok, "LPDWORD|LPCOLORREF|PDWORD|PULONG")) {
tok->str("unsigned");
tok->insertToken("*");
tok->insertToken("long");
} else if (Token::Match(tok, "LPINT|PINT")) {
tok->str("int");
tok->insertToken("*");
} else if (Token::Match(tok, "LPLONG|PLONG")) {
tok->str("long");
tok->insertToken("*");
} else if (Token::Match(tok, "LPSTR|PSTR|PCHAR")) {
tok->str("char");
tok->insertToken("*");
} else if (Token::Match(tok, "PWSTR|PWCHAR")) {
tok->str("wchar_t");
tok->insertToken("*");
} else if (Token::Match(tok, "LPVOID|PVOID|HANDLE|HBITMAP|HBRUSH|HCOLORSPACE|HCURSOR|HDC|HFONT|HGDIOBJ|HGLOBAL|HICON|HINSTANCE|HKEY|HLOCAL|HMENU|HMETAFILE|HMODULE|HPALETTE|HPEN|HRGN|HRSRC|HWND|SERVICE_STATUS_HANDLE|SC_LOCK|SC_HANDLE|HACCEL|HCONV|HCONVLIST|HDDEDATA|HDESK|HDROP|HDWP|HENHMETAFILE|HHOOK|HKL|HMONITOR|HSZ|HWINSTA")) {
tok->str("void");
tok->insertToken("*");
} else if ((tok->str() == "PHANDLE")) {
tok->str("void");
tok->insertToken("*");
tok->insertToken("*");
} else if (Token::Match(tok, "LPWORD|PWORD|PUSHORT")) {
tok->str("unsigned");
tok->insertToken("*");
tok->insertToken("short");
} else if (tok->str() == "SHORT")
tok->str("short");
else if (Token::Match(tok, "UINT|MMRESULT|SOCKET|ULONG32|UINT32|DWORD32")) {
tok->str("unsigned");
tok->insertToken("int");
} else if (Token::Match(tok, "UINT_PTR|WPARAM")) {
tok->str("unsigned");
if (_settings->platformType == Settings::Win64) {
tok->insertToken("long");
tok->insertToken("long");
} else {
tok->insertToken("int");
}
} else if (Token::Match(tok, "USHORT|WORD|ATOM|LANGID")) {
tok->str("unsigned");
tok->insertToken("short");
} else if (tok->str() == "VOID")
tok->str("void");
else if (tok->str() == "TCHAR") {
if (_settings->platformType == Settings::Win32A)
tok->str("char");
else {
tok->str("wchar_t");
}
} else if (tok->str() == "TBYTE") {
tok->str("unsigned");
if (_settings->platformType == Settings::Win32A)
tok->insertToken("short");
else
tok->insertToken("char");
} else if (Token::Match(tok, "PTSTR|LPTSTR")) {
if (_settings->platformType == Settings::Win32A) {
tok->str("char");
tok->insertToken("*");
} else {
tok->str("wchar_t");
tok->insertToken("*");
}
} else if (Token::Match(tok, "PCTSTR|LPCTSTR")) {
tok->str("const");
if (_settings->platformType == Settings::Win32A) {
tok->insertToken("*");
tok->insertToken("char");
} else {
tok->insertToken("*");
tok->insertToken("wchar_t");
}
} else if (Token::Match(tok, "ULONG64|DWORD64")) {
tok->str("unsigned");
tok->insertToken("long");
} else if (tok->str() == "HALF_PTR") {
if (_settings->platformType == Settings::Win64)
tok->str("int");
else
tok->str("short");
} else if (tok->str() == "INT_PTR") {
if (_settings->platformType == Settings::Win64) {
tok->str("long");
tok->insertToken("long");
} else {
tok->str("int");
}
} else if (tok->str() == "LPWSTR") {
tok->str("wchar_t");
tok->insertToken("*");
} else if (tok->str() == "LPCWSTR") {
tok->str("const");
tok->insertToken("*");
tok->insertToken("wchar_t");
}
}
}
}
void Tokenizer::simplifyStdType()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
// long unsigned => unsigned long
if (Token::Match(tok, "char|short|int|long|__int8|__int16|__int32|__int64 unsigned|signed")) {
bool isUnsigned = tok->next()->str() == "unsigned";
tok->deleteNext();
tok->isUnsigned(isUnsigned);
tok->isSigned(!isUnsigned);
}
else if (!Token::Match(tok, "unsigned|signed|char|short|int|long|__int8|__int16|__int32|__int64"))
continue;
// check if signed or unsigned specified
if (Token::Match(tok, "unsigned|signed")) {
bool isUnsigned = tok->str() == "unsigned";
// unsigned i => unsigned int i
if (!Token::Match(tok->next(), "char|short|int|long|__int8|__int16|__int32|__int64"))
tok->str("int");
else
tok->deleteThis();
tok->isUnsigned(isUnsigned);
tok->isSigned(!isUnsigned);
}
if (tok->str() == "__int8")
tok->str("char");
else if (tok->str() == "__int16")
tok->str("short");
else if (tok->str() == "__int32")
tok->str("int");
else if (tok->str() == "__int64") {
tok->str("long");
tok->isLong(true);
} else if (tok->str() == "int") {
if (tok->strAt(1) == "long") {
tok->str("long");
tok->deleteNext();
} else if (tok->strAt(1) == "short") {
tok->str("short");
tok->deleteNext();
}
if (tok->strAt(1) == "long") {
tok->isLong(true);
tok->deleteNext();
}
if (Token::Match(tok->next(), "unsigned|signed")) {
tok->isUnsigned(tok->next()->str() == "unsigned");
tok->isSigned(tok->next()->str() == "signed");
tok->deleteNext();
if (tok->strAt(1) == "long")
tok->deleteNext();
else if (tok->strAt(1) == "short")
tok->deleteNext();
}
} else if (tok->str() == "long") {
if (tok->strAt(1) == "long") {
tok->isLong(true);
tok->deleteNext();
}
if (tok->strAt(1) == "int") {
tok->deleteNext();
if (Token::Match(tok->next(), "unsigned|signed")) {
tok->isUnsigned(tok->next()->str() == "unsigned");
tok->isSigned(tok->next()->str() == "signed");
tok->deleteNext();
}
} else if (tok->strAt(1) == "double") {
tok->str("double");
tok->isLong(true);
tok->deleteNext();
} else if (Token::Match(tok->next(), "unsigned|signed")) {
tok->isUnsigned(tok->next()->str() == "unsigned");
tok->isSigned(tok->next()->str() == "signed");
tok->deleteNext();
if (tok->strAt(1) == "int")
tok->deleteNext();
}
} else if (tok->str() == "short") {
if (tok->strAt(1) == "int")
tok->deleteNext();
if (Token::Match(tok->next(), "unsigned|signed")) {
tok->isUnsigned(tok->next()->str() == "unsigned");
tok->isSigned(tok->next()->str() == "signed");
tok->deleteNext();
if (tok->strAt(1) == "int")
tok->deleteNext();
}
}
}
}
void Tokenizer::simplifyIfAndWhileAssign()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (!Token::Match(tok->next(), "if|while ( !| (| %var% =") &&
!Token::Match(tok->next(), "if|while ( !| (| %var% . %var% ="))
continue;
// simplifying a "while(cond) { }" condition ?
const bool iswhile(tok->next()->str() == "while");
// simplifying a "do { } while(cond);" condition ?
const bool isDoWhile = iswhile && Token::Match(tok, "}") && Token::Match(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(tok->strAt(2) == "!");
if (isNot)
tok->next()->deleteNext();
// Delete parentheses.. and remember how many there are with
// their links.
std::stack<Token *> braces;
while (tok->next()->str() == "(") {
braces.push(tok->next()->link());
tok->deleteNext();
}
// Skip the "%var% = ..."
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) {
unsigned 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<Token *> braces2;
for (tok2 = tok2->next(); tok2 && tok2 != tok; tok2 = tok2->previous()) {
tok3->insertToken(tok2->str());
tok3->next()->varId(tok2->varId());
Token *newTok = tok3->next();
newTok->fileIndex(tok2->fileIndex());
newTok->linenr(tok2->linenr());
// link() newly tokens manually
if (Token::Match(newTok, "}|)|]")) {
braces2.push(newTok);
} else if (Token::Match(newTok, "{|(|[")) {
Token::createMutualLinks(newTok, braces2.top());
braces2.pop();
}
}
}
}
}
}
void Tokenizer::simplifyVariableMultipleAssign()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "%var% = %var% = %num%|%var% ;")) {
// skip intermediate assignments
Token *tok2 = tok->previous();
while (tok2 &&
tok2->str() == "=" &&
Token::Match(tok2->previous(), "%var%")) {
tok2 = tok2->tokAt(-2);
}
if (!tok2 || tok2->str() != ";") {
continue;
}
Token *stopAt = tok->tokAt(2);
const Token *valueTok = tok->tokAt(4);
const std::string value(valueTok->str());
tok2 = tok2->next();
while (tok2 != stopAt) {
tok2->next()->insertToken(";");
tok2->next()->insertToken(value);
tok2 = tok2->tokAt(4);
}
}
}
}
void Tokenizer::simplifyIfNot()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "(|&&|%oror%")) {
tok = tok->next();
while (tok && tok->str() == "(")
tok = tok->next();
if (!tok)
break;
if (Token::Match(tok, "0|false == (") ||
Token::Match(tok, "0|false == %var%")) {
tok->deleteNext();
tok->str("!");
}
else if (Token::Match(tok, "%var% == 0|false")) {
tok->deleteNext(2);
tok = tok->previous();
tok->insertToken("!");
tok = tok->next();
}
else if (Token::Match(tok, "%var% .|:: %var% == 0|false")) {
tok = tok->previous();
tok->insertToken("!");
tok = tok->tokAt(4);
tok->deleteNext(2);
}
else if (Token::Match(tok, "* %var% == 0|false")) {
tok = tok->previous();
tok->insertToken("!");
tok = tok->tokAt(3);
tok->deleteNext(2);
}
}
else if (tok->link() && Token::Match(tok, ") == 0|false")) {
// if( foo(x) == 0 )
if (Token::Match(tok->link()->tokAt(-2), "( %var%")) {
tok->deleteNext(2);
tok->link()->previous()->insertToken(tok->link()->previous()->str());
tok->link()->tokAt(-2)->str("!");
}
// if( (x) == 0 )
else if (tok->link()->strAt(-1) == "(") {
tok->deleteNext(2);
tok->link()->insertToken("(");
tok->link()->str("!");
Token *temp = tok->link();
Token::createMutualLinks(tok->link()->next(), tok);
temp->link(0);
}
}
}
}
void Tokenizer::simplifyIfNotNull()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
Token *deleteFrom = NULL;
// Remove 'x = (x != 0)'
if (Token::simpleMatch(tok, "= (")) {
if (Token::Match(tok->tokAt(-2), "[;{}] %var%")) {
const std::string varname(tok->previous()->str());
if (Token::simpleMatch(tok->tokAt(2), (varname + " != 0 ) ;").c_str()) ||
Token::simpleMatch(tok->tokAt(2), ("0 != " + varname + " ) ;").c_str())) {
tok = tok->tokAt(-2);
tok->deleteNext(8);
}
}
continue;
}
if (Token::Match(tok, "==|!= ("))
tok = tok->linkAt(1);
if (Token::Match(tok, "(|&&|%oror%")) {
tok = tok->next();
if (!tok)
break;
if (Token::simpleMatch(tok, "0 != (") ||
Token::Match(tok, "0 != %var%")) {
deleteFrom = tok->previous();
if (tok->tokAt(2))
tok->tokAt(2)->isPointerCompare(true);
}
else if (Token::Match(tok, "%var% != 0")) {
deleteFrom = tok;
tok->isPointerCompare(true);
}
else if (Token::Match(tok, "%var% .|:: %var% != 0")) {
tok = tok->tokAt(2);
deleteFrom = tok;
tok->isPointerCompare(true);
}
}
else if (tok->link() && Token::simpleMatch(tok, ") != 0")) {
deleteFrom = tok;
}
if (deleteFrom) {
Token::eraseTokens(deleteFrom, deleteFrom->tokAt(3));
tok = deleteFrom;
}
}
}
void Tokenizer::simplifyIfSameInnerCondition()
{
// same inner condition
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "if ( %var% ) {")) {
const unsigned int varid(tok->tokAt(2)->varId());
if (!varid)
continue;
for (Token *tok2 = tok->tokAt(5); tok2; tok2 = tok2->next()) {
if (tok2->str() == "{" || tok2->str() == "}")
break;
if (Token::simpleMatch(tok2, "if (")) {
tok2 = tok2->tokAt(2);
if (Token::Match(tok2, "%varid% )", varid))
tok2->str("true");
else if (Token::Match(tok2, "! %varid% )", varid))
tok2->next()->varId(varid);
break;
}
}
}
}
}
bool Tokenizer::simplifyLogicalOperators()
{
bool ret = false;
// "if (not p)" => "if (!p)"
// "if (p and q)" => "if (p && q)"
// "if (p or q)" => "if (p || q)"
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "if|while ( not|compl %var%")) {
tok->tokAt(2)->str(tok->strAt(2) == "not" ? "!" : "~");
ret = true;
} else if (Token::Match(tok, "&& not|compl %var%")) {
tok->next()->str(tok->next()->str() == "not" ? "!" : "~");
ret = true;
} else if (Token::Match(tok, "|| not|compl %var%")) {
tok->next()->str(tok->next()->str() == "not" ? "!" : "~");
ret = true;
}
// "%var%|) and %var%|("
else if (Token::Match(tok, "%var% %any%")) {
if (!Token::Match(tok, "and|or|bitand|bitor|xor|not_eq"))
continue;
const Token *tok2 = tok;
while (NULL != (tok2 = tok2->previous())) {
if (tok2->str() == ")")
tok2 = tok2->link();
else if (Token::Match(tok2, "(|;|{|}"))
break;
}
if (tok2 && Token::Match(tok2->previous(), "if|while (")) {
if (tok->str() == "and")
tok->str("&&");
else if (tok->str() == "or")
tok->str("||");
else if (tok->str() == "bitand")
tok->str("&");
else if (tok->str() == "bitor")
tok->str("|");
else if (tok->str() == "xor")
tok->str("^");
else if (tok->str() == "not_eq")
tok->str("!=");
ret = true;
}
}
}
return ret;
}
// int i(0); => int i; i = 0;
// int i(0), j; => int i; i = 0; int j;
void Tokenizer::simplifyInitVar()
{
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% *| %var% ( &| %any% ) ;") ||
Token::Match(tok, "%type% *| %var% ( %type% (")) {
tok = initVar(tok);
} else if (Token::Match(tok, "class|struct|union| %type% *| %var% ( &| %any% ) ,")) {
Token *tok1 = tok;
while (tok1->str() != ",")
tok1 = tok1->next();
tok1->str(";");
Token *tok2 = tok;
if (Token::Match(tok2, "class|struct|union")) {
tok1->insertToken(tok2->str());
tok1 = tok1->next();
tok2 = tok2->next();
}
tok1->insertToken(tok2->str());
tok1 = tok1->next();
tok2 = tok2->next();
if (tok2->str() == "*") {
tok1->insertToken("*");
}
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->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::map<unsigned int, std::string> constantValues;
bool goback = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (goback) {
tok = tok->previous();
goback = false;
}
// Reference to variable
if (Token::Match(tok, "%type%|* & %var% = %var% ;")) {
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| %var% = %any% ;") ||
Token::Match(tok, "static| const| static| %type% const| %var% ( %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 (tok->str() == "const" || tok->str() == "static")
tok = tok->next();
// pod type
if (!tok->isStandardType())
continue;
const 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% )| ;")) {
//check if there's not a reference usage inside the code
bool withreference = false;
for (const Token *tok2 = valuetok->tokAt(2); tok2; tok2 = tok2->next()) {
if (Token::Match(tok2,"(|[|,|{|return|%op% & %varid%", vartok->varId())) {
withreference = true;
break;
}
}
//don't simplify 'f(&x)' to 'f(&100)'
if (withreference)
continue;
constantValues[vartok->varId()] = valuetok->str();
// remove statement
while (tok1->next()->str() != ";")
tok1->deleteNext();
tok1->deleteNext();
tok1->deleteThis();
tok = tok1;
goback = true;
}
}
else if (tok->varId() && constantValues.find(tok->varId()) != constantValues.end()) {
tok->str(constantValues[tok->varId()]);
}
}
}
// variable id for float/double variables
std::set<unsigned int> floatvars;
// auto variables..
for (Token *tok = list.front(); tok; tok = tok->next()) {
// Search for a block of code
if (! Token::Match(tok, ") const| {"))
continue;
// parse the block of code..
int indentlevel = 0;
Token *tok2 = tok;
for (; tok2; tok2 = tok2->next()) {
if (Token::Match(tok2, "[;{}] float|double %var% ;")) {
floatvars.insert(tok2->tokAt(2)->varId());
}
if (tok2->str() == "{")
++indentlevel;
else if (tok2->str() == "}") {
--indentlevel;
if (indentlevel <= 0)
break;
}
else if (tok2->previous()->str() != "*" &&
(Token::Match(tok2, "%var% = %bool%|%char%|%num%|%str%|%var% ;") ||
Token::Match(tok2, "%var% [ ] = %str% ;") ||
Token::Match(tok2, "%var% [ %num% ] = %str% ;") ||
Token::Match(tok2, "%var% = & %var% ;") ||
Token::Match(tok2, "%var% = & %var% [ 0 ] ;"))) {
const unsigned int varid = tok2->varId();
if (varid == 0)
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();
while (Token::Match(tok3->previous(), ":: %type%"))
tok3 = tok3->tokAt(-2);
if (Token::Match(tok3->tokAt(-2), "for ( %type%"))
continue;
}
// struct name..
const std::string structname = Token::Match(tok2->tokAt(-3), "[;{}] %var% .") ?
std::string(tok2->strAt(-2) + " .") :
std::string("");
if (tok2->str() == tok2->strAt(2))
continue;
const Token * const valueToken = tok2->tokAt(2);
std::string value;
unsigned int valueVarId = 0;
Token *tok3 = NULL;
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;
ret |= simplifyKnownVariablesSimplify(&tok2, tok3, varid, structname, value, valueVarId, valueIsPointer, valueToken, indentlevel);
}
else if (Token::Match(tok2, "( %var% == %num% ) {")) {
const unsigned int varid = tok2->next()->varId();
if (varid == 0)
continue;
const std::string structname;
const Token *valueToken = tok2->tokAt(3);
std::string value(tok2->strAt(3));
const unsigned int valueVarId = 0;
const bool valueIsPointer = false;
Token *scopeStart = tok2->tokAt(6);
ret |= simplifyKnownVariablesSimplify(&scopeStart, scopeStart, varid, structname, value, valueIsPointer, valueVarId, valueToken, -1);
}
else if (Token::Match(tok2, "strcpy|sprintf ( %var% , %str% ) ;")) {
const unsigned int varid(tok2->tokAt(2)->varId());
std::string::size_type n = std::string::npos;
if (varid == 0)
continue;
const std::string structname;
const Token * const valueToken = tok2->tokAt(4);
std::string value(valueToken->str());
if (tok2->str() == "sprintf") {
while ((n = value.find("%%",n+1)) != std::string::npos) {
value.replace(n,2,"%");
}
}
const unsigned int valueVarId(0);
const bool valueIsPointer(false);
Token *tok3 = tok2->tokAt(6);
ret |= simplifyKnownVariablesSimplify(&tok2, tok3, varid, structname, 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(unsigned int varid, Token **_tok2, Token **_tok3, std::string &value, unsigned int &valueVarId, bool &valueIsPointer, bool floatvar)
{
Token *tok2 = *_tok2;
Token *tok3 = NULL;
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 std::string& compareop = tok2->strAt(5);
if (compareop == "<") {
value = tok2->strAt(6);
valueVarId = tok2->tokAt(6)->varId();
} else
value = MathLib::longToString(MathLib::toLongNumber(tok2->strAt(6)) + 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;
}
// float value should contain a "."
else if (tok2->tokAt(2)->isNumber() &&
floatvar &&
value.find(".") == std::string::npos) {
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, unsigned int varid, const std::string &structname, std::string &value, unsigned int valueVarId, bool valueIsPointer, const Token * const valueToken, int indentlevel) const
{
const bool pointeralias(valueToken->isName() || Token::Match(valueToken, "& %var% ["));
if (_errorLogger && !list.getFiles().empty())
_errorLogger->reportProgress(list.getFiles()[0], "Tokenize (simplifyKnownVariables)", tok3->progressValue());
bool ret = false;
// skip increments and decrements if the given indentlevel is -1
const bool skipincdec = (indentlevel == -1);
Token* bailOutFromLoop = 0;
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% * %var% ; %var% = & %var% ;") &&
(*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 (tok3->str() == "break" || tok3->str() == "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 do is found
if (tok3->str() == "do")
break;
// Stop if unknown function call is seen
// If the variable is a global or a member variable it might be
// changed by the function call
// TODO: don't bail out if the variable is a local variable,
// then it can't be changed by the function call.
if (tok3->str() == ")" && tok3->link() &&
Token::Match(tok3->link()->tokAt(-2), "[;{}] %var% (") &&
!Token::Match(tok3->link()->previous(), "if|for|while|switch|BOOST_FOREACH"))
break;
// Stop if something like 'while (--var)' is found
if (tok3->str() == "for" || tok3->str() == "while" || tok3->str() == "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 = 0;
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, "%var% = realloc ( %var% ,") &&
tok3->varId() == varid &&
tok3->tokAt(4)->varId() == varid) {
tok3->tokAt(4)->str(value);
ret = true;
}
// condition "(|&&|%OROR% %varid% )|&&|%OROR%
if (!Token::Match(tok3->previous(), "( %var% )") &&
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(), "[(,] %var% [,)]")) {
// 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 (_settings->debugwarnings) {
// 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(), ". %var% ("))
break;
// suppress debug-warning when assignment
if (tok3->strAt(1) == "=")
break;
// taking address of variable..
if (Token::Match(tok3->tokAt(-2), "return|= & %var% ;"))
break;
// parameter in function call..
if (Token::Match(tok3->tokAt(-2), "%var% ( %var% ,|)") ||
Token::Match(tok3->previous(), ", %var% ,|)"))
break;
// conditional increment
if (Token::Match(tok3->tokAt(-3), ") { ++|--") ||
Token::Match(tok3->tokAt(-2), ") { %var% ++|--"))
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, "& %var% ;")) {
tok3->insertToken("&");
tok3 = tok3->next();
}
tok3 = tok3->next();
tok3->str(value);
tok3->varId(valueVarId);
ret = true;
}
// Delete pointer alias
if (pointeralias && tok3->str() == "delete" &&
(Token::Match(tok3, "delete %varid% ;", varid) ||
Token::Match(tok3, "delete [ ] %varid%", varid))) {
tok3 = (tok3->next() && 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, ("%var% ( " + structname + " %varid% ,").c_str(), varid)) {
static const char * const functionName[] = {
"memcmp","memcpy","memmove","memset",
"strcmp","strcpy","strncmp","strncpy","strdup"
};
for (unsigned int i = 0; i < (sizeof(functionName) / sizeof(*functionName)); ++i) {
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, ("%var% ( %any% , " + structname + " %varid% ,|)").c_str(), varid)) {
static const char * const functionName[] = {
"memcmp","memcpy","memmove",
"strcmp","strcpy","strncmp","strncpy"
};
for (unsigned int i = 0; i < (sizeof(functionName) / sizeof(*functionName)); ++i) {
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" && (prev->isName() || prev->str() == "::"))
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 + " %var% =").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) {
tok3 = tok3->previous();
tok3->deleteThis();
ret = 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 (tok4->str() == "(" || tok4->str() == ")")
break;
// Replace variable used in condition..
if (Token::Match(tok4, "; %var% <|<=|!= %var% ; ++| %var% ++| )")) {
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 (!skipincdec && 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();
}
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), "[.[]")) {
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) &&
(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 (tok->str() == "(" || tok->str() == "[" ||
(tok->str() == "{" && tok->previous() && tok->previous()->str() == "="))
tok = tok->link();
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;
}
}
}
}
}
bool Tokenizer::simplifyRedundantParentheses()
{
bool ret = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() != "(")
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()->previous() == tok->next()->link()) {
// We have "(( *something* ))", remove the inner
// parentheses
tok->deleteNext();
tok->link()->tokAt(-2)->deleteNext();
ret = true;
}
if (Token::Match(tok->previous(), "! ( %var% )")) {
// Remove the parentheses
tok->deleteThis();
tok->deleteNext();
ret = true;
}
if (Token::Match(tok->previous(), "[(,;{}] ( %var% (") &&
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 [| ]| %var% ) ;")) {
// 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(), "[(!*;{}] ( %var% )") &&
(tok->next()->varId() != 0 || Token::Match(tok->tokAt(3), "[+-/=]"))) {
// We have "( var )", remove the parentheses
tok->deleteThis();
tok->deleteNext();
ret = true;
}
while (Token::Match(tok->previous(), "[;{}[]().,!*] ( %var% .")) {
Token *tok2 = tok->tokAt(2);
while (Token::Match(tok2, ". %var%")) {
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;
continue;
}
if (Token::simpleMatch(tok->previous(), "? (") && Token::simpleMatch(tok->link(), ") :")) {
const Token *tok2 = tok->next();
while (tok2 && (Token::Match(tok2,"%bool%|%num%|%var%") || 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::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 !!(%var%|)) ( %num%|%bool% ) %op%|;|,|)"
if (Token::Match(tok, "( %bool%|%num% ) %cop%|;|,|)") &&
tok->strAt(-2) != "operator" &&
tok->previous() &&
!tok->previous()->isName() &&
tok->previous()->str() != ")" &&
(!isCPP() || tok->previous()->str() != ">")) {
tok->link()->deleteThis();
tok->deleteThis();
ret = true;
}
}
return ret;
}
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 <= (MathLib::bigint)Token::getStrLength(tok)) {
tok->str(std::string("'" + Token::getCharAt(tok, (size_t)index) + "'"));
tok->deleteNext(3);
}
}
}
}
void Tokenizer::simplifyReference()
{
if (isC())
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
// starting executable scope..
if (Token::Match(tok, ") const| {")) {
// replace references in this scope..
if (tok->next()->str() != "{")
tok = tok->next();
Token * const end = tok->next()->link();
for (Token *tok2 = tok; tok2 && tok2 != end; tok2 = tok2->next()) {
// found a reference..
if (Token::Match(tok2, "[;{}] %type% & %var% (|= %var% )| ;")) {
const unsigned int ref_id = tok2->tokAt(3)->varId();
if (!ref_id)
continue;
// replace reference in the code..
for (Token *tok3 = tok2->tokAt(7); tok3 && tok3 != end; tok3 = tok3->next()) {
if (tok3->varId() == ref_id) {
tok3->str(tok2->strAt(5));
tok3->varId(tok2->tokAt(5)->varId());
}
}
tok2->deleteNext(6+(tok->strAt(6)==")" ? 1 : 0));
}
}
}
}
}
bool Tokenizer::simplifyCalculations()
{
return TemplateSimplifier::simplifyCalculations(list.front());
}
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(), "* ( %var% +|- %num%|%var% )")) {
// 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::simplifyGoto()
{
std::list<Token *> gotos;
unsigned int indentlevel = 0;
unsigned int indentspecial = 0;
Token *beginfunction = 0;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(" || tok->str() == "[")
tok = tok->link();
else if (Token::Match(tok, "class|namespace|struct|union %type% :|{")) {
tok = tok->tokAt(2);
while (tok && !Token::Match(tok, "[;{=]"))
tok = tok->next();
if (tok && tok->str() == "{")
++indentspecial;
else if (!tok)
break;
else
continue;
}
else if (Token::Match(tok, "namespace|struct|union {")) {
tok = tok->next();
++indentspecial;
}
else if (tok->str() == "{") {
if ((!beginfunction && !indentlevel) ||
(tok->previous() && tok->previous()->str() == "="))
tok = tok->link();
else
++indentlevel;
}
else if (tok->str() == "}") {
if (indentlevel == 0) {
if (indentspecial)
--indentspecial;
} else {
--indentlevel;
if (indentlevel == 0) {
gotos.clear();
beginfunction = 0;
}
}
}
if (!indentlevel && Token::Match(tok, ") const| {"))
beginfunction = tok;
else if (indentlevel && Token::Match(tok, "[{};] goto %var% ;"))
gotos.push_back(tok->next());
else if (indentlevel == 1 && Token::Match(tok, "[{};] %var% : ;") && tok->next()->str() != "default") {
// Is this label at the end..
bool end = false;
unsigned int level = 0;
for (const Token *tok2 = tok->tokAt(3); tok2; tok2 = tok2->next()) {
if (tok2->str() == "(" || tok2->str() == "[")
tok2 = tok2->link();
else if (tok2->str() == "{") {
++level;
}
else if (tok2->str() == "}") {
if (!level) {
end = true;
break;
}
--level;
}
if ((Token::Match(tok2, "[{};] %var% : ;") && tok2->next()->str() != "default") ||
Token::Match(tok2, "[{};] goto %var% ;")) {
break;
}
}
if (!end)
continue;
const std::string name(tok->next()->str());
tok->deleteNext(3);
// This label is at the end of the function.. replace all matching goto statements..
for (std::list<Token *>::iterator it = gotos.begin(); it != gotos.end(); ++it) {
Token *token = *it;
if (token->next()->str() == name) {
// Delete the "goto name;"
token = token->previous();
// change 'tok' before 'goto' if it coincides with the ';' token after 'name'
if (token->tokAt(3) == tok)
tok = token;
token->deleteNext(3);
// Insert the statements..
bool ret = false; // is there return
bool ret2 = false; // is there return in indentlevel 0
std::list<Token*> links;
std::list<Token*> links2;
std::list<Token*> links3;
unsigned int lev = 0;
unsigned int roundbraces = 0;
for (const Token *tok2 = tok->next(); tok2; tok2 = tok2->next()) {
if (tok2->str() == ")") {
if (!roundbraces)
break;
--roundbraces;
}
if (tok2->str() == "(")
++roundbraces;
if (!roundbraces && tok2->str() == "}") {
if (!lev)
break;
--lev;
} else if (!roundbraces && tok2->str() == "{") {
++lev;
} else if (!roundbraces && tok2->str() == "return") {
ret = true;
if (indentlevel == 1 && lev == 0)
ret2 = true;
}
token->insertToken(tok2->str());
token = token->next();
token->linenr(tok2->linenr());
token->varId(tok2->varId());
if (ret2 && roundbraces == 0 && tok2->str() == ";") {
break;
}
if (token->str() == "(") {
links.push_back(token);
} else if (token->str() == ")") {
if (links.empty()) {
// This should never happen at this point
syntaxError(token, ')');
return;
}
Token::createMutualLinks(links.back(), token);
links.pop_back();
} else if (token->str() == "{") {
links2.push_back(token);
} else if (token->str() == "}") {
if (links2.empty()) {
// This should never happen at this point
syntaxError(token, '}');
return;
}
Token::createMutualLinks(links2.back(), token);
links2.pop_back();
} else if (token->str() == "[") {
links3.push_back(token);
} else if (token->str() == "]") {
if (links3.empty()) {
// This should never happen at this point
syntaxError(token, ']');
return;
}
Token::createMutualLinks(links3.back(), token);
links3.pop_back();
}
}
if (!ret) {
token->insertToken(";");
token->insertToken("return");
}
}
}
// goto the end of the function
if (tok->str() == "{")
tok = tok->link();
else {
while (tok) {
if (tok->str() == "{")
tok = tok->link();
else if (tok->str() == "}")
break;
tok = tok->next();
}
}
if (!tok)
break;
gotos.clear();
beginfunction = 0;
indentlevel = 0;
continue;
}
}
}
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 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(";");
}
}
void Tokenizer::duplicateEnumError(const Token * tok1, const Token * tok2, const std::string & type) const
{
if (tok1 && !(_settings->isEnabled("style")))
return;
std::list<const Token*> locationList;
locationList.push_back(tok1);
locationList.push_back(tok2);
const std::string tok2_str = tok2 ? tok2->str() : std::string("name");
reportError(locationList, Severity::style, "variableHidingEnum",
std::string(type + " '" + tok2_str + "' hides enumerator with same name"));
}
// Check if this statement is a duplicate definition. A duplicate
// definition will hide the enumerator within it's scope so just
// skip the entire scope of the duplicate.
bool Tokenizer::duplicateDefinition(Token ** tokPtr, const Token * name) 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() == "[") {
end = end->link()->next();
} else if (end->str() == ",") {
// check for function argument
if (Token::Match(tok->previous(), "(|,"))
return false;
// find end of definition
int level = 0;
while (end->next() && (!Token::Match(end->next(), ";|)|>") ||
(end->next()->str() == ")" && level == 0))) {
if (end->next()->str() == "(")
++level;
else if (end->next()->str() == ")")
--level;
end = end->next();
}
} else if (end->str() == ")") {
// check for function argument
if (tok->previous()->str() == ",")
return false;
}
if (end) {
if (Token::simpleMatch(end, ") {")) { // function parameter ?
// make sure it's not a conditional
if (Token::Match(end->link()->previous(), "if|for|while|switch|BOOST_FOREACH"))
return false;
// look backwards
if (tok->previous()->str() == "enum" ||
(Token::Match(tok->previous(), "%type%") &&
tok->previous()->str() != "return") ||
Token::Match(tok->tokAt(-2), "%type% &|*")) {
duplicateEnumError(*tokPtr, name, "Function parameter");
// duplicate definition so skip entire function
*tokPtr = end->next()->link();
return true;
}
} else if (end->str() == ">") { // template parameter ?
// look backwards
if (tok->previous()->str() == "enum" ||
(Token::Match(tok->previous(), "%type%") &&
tok->previous()->str() != "return")) {
// duplicate definition so skip entire template
while (end && end->str() != "{")
end = end->next();
if (end) {
duplicateEnumError(*tokPtr, name, "Template parameter");
*tokPtr = end->link();
return true;
}
}
} else {
if (Token::Match(tok->previous(), "enum|,")) {
duplicateEnumError(*tokPtr, name, "Variable");
return true;
} else if (Token::Match(tok->previous(), "%type%")) {
// look backwards
const Token *back = tok;
while (back && back->isName())
back = back->previous();
if (!back || (Token::Match(back, "[(,;{}]") && !Token::Match(back->next(),"return|throw"))) {
duplicateEnumError(*tokPtr, name, "Variable");
return true;
}
}
}
}
}
return false;
}
class EnumValue {
public:
EnumValue() {
name = 0;
value = 0;
start = 0;
end = 0;
}
EnumValue(const EnumValue &ev) {
name = ev.name;
value = ev.value;
start = ev.start;
end = ev.end;
}
EnumValue(Token *name_, Token *value_, Token *start_, Token *end_) {
name = name_;
value = value_;
start = start_;
end = end_;
}
void simplify(const std::map<std::string, EnumValue> &enumValues) {
for (Token *tok = start; tok; tok = tok->next()) {
if (enumValues.find(tok->str()) != enumValues.end()) {
const EnumValue &other = enumValues.find(tok->str())->second;
if (other.value != NULL)
tok->str(other.value->str());
else {
bool islast = (tok == end);
Token *last = Tokenizer::copyTokens(tok, other.start, other.end);
if (last == tok->next()) // tok->deleteThis() invalidates a pointer that points at the next token
last = tok;
tok->deleteThis();
if (islast) {
end = last;
}
tok = last;
}
}
if (tok == end)
break;
}
// Simplify calculations..
while (start && start->previous() && TemplateSimplifier::simplifyNumericCalculations(start->previous())) { }
if (Token::Match(start, "%num% [,}]")) {
value = start;
start = end = NULL;
}
}
Token *name;
Token *value;
Token *start;
Token *end;
};
void Tokenizer::simplifyEnum()
{
std::string className;
int classLevel = 0;
bool goback = false;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (goback) {
//jump back once, see the comment at the end of the function
goback = false;
tok = tok->previous();
}
if (Token::Match(tok, "class|struct|namespace") && tok->next() &&
(!tok->previous() || (tok->previous() && tok->previous()->str() != "enum"))) {
className = tok->next()->str();
classLevel = 0;
} else if (tok->str() == "}") {
--classLevel;
if (classLevel < 0)
className = "";
} else if (tok->str() == "{") {
++classLevel;
} else if (tok->str() == "enum") {
Token *temp = tok->next();
if (!temp)
break;
if (Token::Match(temp, "class|struct"))
temp = temp->next();
if (!Token::Match(temp, "[{:]") &&
(!temp->isName() || !Token::Match(temp->next(), "[{:;]")))
continue;
Token *start = tok;
Token *enumType = 0;
Token *typeTokenStart = 0;
Token *typeTokenEnd = 0;
// check for C++0x enum class
if (Token::Match(tok->next(), "class|struct"))
tok->deleteNext();
// check for name
if (tok->next()->isName()) {
enumType = tok->next();
tok = tok->next();
}
// check for C++0x typed enumeration
if (tok->next()->str() == ":") {
tok = tok->next();
if (!tok->next()) {
syntaxError(tok);
return; // can't recover
}
typeTokenStart = tok->next();
tok = tok->next();
typeTokenEnd = typeTokenStart;
while (typeTokenEnd->next() && (typeTokenEnd->next()->str() == "::" ||
Token::Match(typeTokenEnd->next(), "%type%"))) {
typeTokenEnd = typeTokenEnd->next();
tok = tok->next();
}
if (!tok->next()) {
syntaxError(tok);
return; // can't recover
}
}
// check for forward declaration
if (tok->next()->str() == ";") {
tok = tok->next();
/** @todo start substitution check at forward declaration */
// delete forward declaration
Token::eraseTokens(start, tok);
start->deleteThis();
tok = start;
continue;
} else if (tok->next()->str() != "{") {
syntaxError(tok->next());
return;
}
Token *tok1 = tok->next();
Token *end = tok1->link();
tok1 = tok1->next();
MathLib::bigint lastValue = -1;
Token * lastEnumValueStart = 0;
Token * lastEnumValueEnd = 0;
// iterate over all enumerators between { and }
// Give each enumerator the const value specified or if not specified, 1 + the
// previous value or 0 if it is the first one.
std::map<std::string,EnumValue> enumValues;
for (; tok1 && tok1 != end; tok1 = tok1->next()) {
Token * enumName = 0;
Token * enumValue = 0;
Token * enumValueStart = 0;
Token * enumValueEnd = 0;
if (tok1->str() == "(") {
tok1 = tok1->link();
continue;
}
if (Token::Match(tok1->previous(), ",|{ %type% ,|}")) {
// no value specified
enumName = tok1;
++lastValue;
tok1->insertToken("=");
tok1 = tok1->next();
if (lastEnumValueStart && lastEnumValueEnd) {
// previous value was an expression
Token *valueStart = tok1;
tok1 = copyTokens(tok1, lastEnumValueStart, lastEnumValueEnd);
// value is previous expression + 1
tok1->insertToken("+");
tok1 = tok1->next();
tok1->insertToken("1");
enumValue = 0;
enumValueStart = valueStart->next();
enumValueEnd = tok1->next();
} else {
// value is previous numeric value + 1
tok1->insertToken(MathLib::longToString(lastValue));
enumValue = tok1->next();
}
} else if (Token::Match(tok1->previous(), ",|{ %type% = %num% ,|}")) {
// value is specified numeric value
enumName = tok1;
lastValue = MathLib::toLongNumber(tok1->strAt(2));
enumValue = tok1->tokAt(2);
lastEnumValueStart = 0;
lastEnumValueEnd = 0;
} else if (Token::Match(tok1->previous(), ",|{ %type% =")) {
// value is specified expression
enumName = tok1;
lastValue = 0;
tok1 = tok1->tokAt(2);
enumValueStart = tok1;
enumValueEnd = tok1;
int level = 0;
while (enumValueEnd->next() && (!Token::Match(enumValueEnd->next(), "[},]") || level)) {
if (Token::Match(enumValueEnd, "(|["))
++level;
else if (Token::Match(enumValueEnd->next(), "]|)"))
--level;
enumValueEnd = enumValueEnd->next();
}
// remember this expression in case it needs to be incremented
lastEnumValueStart = enumValueStart;
lastEnumValueEnd = enumValueEnd;
// skip over expression
tok1 = enumValueEnd;
}
// add enumerator constant..
if (enumName && (enumValue || (enumValueStart && enumValueEnd))) {
EnumValue ev(enumName, enumValue, enumValueStart, enumValueEnd);
ev.simplify(enumValues);
enumValues[enumName->str()] = ev;
lastEnumValueStart = ev.start;
lastEnumValueEnd = ev.end;
if (ev.start == NULL)
lastValue = MathLib::toLongNumber(ev.value->str());
tok1 = ev.end ? ev.end : ev.value;
}
}
// Substitute enum values
{
if (_settings && _settings->terminated())
return;
const std::string pattern = className.empty() ?
std::string("") :
std::string(className + " :: ");
int level = 0;
bool inScope = true;
std::stack<std::set<std::string> > shadowId; // duplicate ids in inner scope
bool simplify = false;
bool hasClass = false;
EnumValue *ev = NULL;
int executableScopeLevel = 0;
if (!tok1)
return;
for (Token *tok2 = tok1->next(); tok2; tok2 = tok2->next()) {
if (tok2->str() == "}") {
--level;
--executableScopeLevel;
if (level < 0)
inScope = false;
if (!shadowId.empty())
shadowId.pop();
} else if (tok2->str() == "{") {
// Is the same enum redefined?
const Token *begin = end->link();
if (tok2->fileIndex() == begin->fileIndex() &&
tok2->linenr() == begin->linenr() &&
Token::Match(begin->tokAt(-2), "enum %type% {") &&
Token::Match(tok2->tokAt(-2), "enum %type% {") &&
begin->previous()->str() == tok2->previous()->str()) {
// remove duplicate enum
Token * startToken = tok2->tokAt(-3);
tok2 = tok2->link()->next();
Token::eraseTokens(startToken, tok2);
if (!tok2)
break;
} else {
// Not a duplicate enum..
++level;
if (executableScopeLevel > 0)
++executableScopeLevel;
// Create a copy of the shadow ids for the inner scope
if (!shadowId.empty())
shadowId.push(shadowId.top());
// are there shadow arguments?
if (Token::simpleMatch(tok2->previous(), ") {") || Token::simpleMatch(tok2->tokAt(-2), ") const {")) {
// Determine if this is a executable scope..
if (executableScopeLevel <= 0) {
const Token *prev = tok2->previous();
while (prev) {
if (prev->str() == "}" || prev->str() == ")")
prev = prev->link();
else if (prev->str() == "{") {
while ((prev = prev->previous()) && (prev->isName()));
if (!prev || prev->str() == ")")
break;
}
prev = prev->previous();
}
if (prev)
executableScopeLevel = 1;
}
bool executableScope = (executableScopeLevel > 0);
std::set<std::string> shadowArg;
for (const Token* arg = tok2; arg && arg->str() != "("; arg = arg->previous()) {
if (Token::Match(arg->previous(), "%type%|*|& %type% [,)]") &&
enumValues.find(arg->str()) != enumValues.end()) {
if (executableScope && Token::Match(arg->previous(), "[*&]"))
continue;
shadowArg.insert(arg->str());
if (inScope && _settings->isEnabled("style")) {
const EnumValue enumValue = enumValues.find(arg->str())->second;
duplicateEnumError(arg, enumValue.name, "Function argument");
}
}
}
if (!shadowArg.empty()) {
if (shadowId.empty())
shadowId.push(shadowArg);
else
shadowId.top().insert(shadowArg.begin(), shadowArg.end());
}
}
// are there shadow variables in the scope?
std::set<std::string> shadowVars;
for (const Token *tok3 = tok2->next(); tok3 && tok3->str() != "}"; tok3 = tok3->next()) {
if (tok3->str() == "{")
tok3 = tok3->link(); // skip inner scopes
else if (tok3->isName() && enumValues.find(tok3->str()) != enumValues.end()) {
const Token *prev = tok3->previous();
if ((prev->isName() && !Token::Match(prev, "return|case|throw")) ||
prev->str() == "*" ||
Token::Match(prev, "& %type% =")) {
// variable declaration?
shadowVars.insert(tok3->str());
if (inScope && _settings->isEnabled("style")) {
const EnumValue enumValue = enumValues.find(tok3->str())->second;
duplicateEnumError(tok3, enumValue.name, "Variable");
}
}
}
}
if (!shadowVars.empty()) {
if (shadowId.empty())
shadowId.push(shadowVars);
else
shadowId.top().insert(shadowVars.begin(), shadowVars.end());
}
}
// Function head
} else if (Token::Match(tok2, "%var% (")) {
const Token *prev = tok2->previous();
bool type = false;
while (prev && (prev->isName() || Token::Match(prev, "*|&|::"))) {
type |= Token::Match(prev, "%type% !!::");
prev = prev->previous();
}
if (type && (!prev || Token::Match(prev, "[;{}]"))) {
// skip ( .. )
tok2 = tok2->next()->link();
}
} else if (!pattern.empty() && Token::Match(tok2, pattern.c_str()) && enumValues.find(tok2->strAt(2)) != enumValues.end()) {
simplify = true;
hasClass = true;
ev = &(enumValues.find(tok2->strAt(2))->second);
} else if (inScope && // enum is in scope
(shadowId.empty() || shadowId.top().find(tok2->str()) == shadowId.top().end()) && // no shadow enum/var/etc of enum
enumValues.find(tok2->str()) != enumValues.end()) { // tok2 is a enum id with a known value
ev = &(enumValues.find(tok2->str())->second);
if (!duplicateDefinition(&tok2, ev->name)) {
if (tok2->strAt(-1) == "::" ||
Token::Match(tok2->next(), "::|[")) {
// Don't replace this enum if:
// * it's preceded or followed by "::"
// * it's followed by "["
} else {
simplify = true;
hasClass = false;
ev = &(enumValues.find(tok2->str())->second);
}
} else {
// something with the same name.
if (shadowId.empty())
shadowId.push(std::set<std::string>());
shadowId.top().insert(tok2->str());
}
}
if (simplify) {
if (ev->value)
tok2->str(ev->value->str());
else {
tok2 = tok2->previous();
tok2->deleteNext();
tok2 = copyTokens(tok2, ev->start, ev->end);
}
if (hasClass) {
tok2->deleteNext(2);
}
simplify = false;
}
}
}
// check for a variable definition: enum {} x;
if (end->next() && end->next()->str() != ";") {
Token *tempTok = end;
tempTok->insertToken(";");
tempTok = tempTok->next();
if (typeTokenStart == 0)
tempTok->insertToken("int");
else {
Token *tempTok1 = typeTokenStart;
tempTok->insertToken(tempTok1->str());
while (tempTok1 != typeTokenEnd) {
tempTok1 = tempTok1->next();
tempTok->insertToken(tempTok1->str());
tempTok = tempTok->next();
}
}
}
if (enumType) {
const std::string pattern(className.empty() ? std::string("") : (className + " :: " + enumType->str()));
// count { and } for tok2
int level = 0;
bool inScope = true;
bool exitThisScope = false;
int exitScope = 0;
bool simplify = false;
bool hasClass = false;
for (Token *tok2 = end->next(); tok2; tok2 = tok2->next()) {
if (tok2->str() == "}") {
--level;
if (level < 0)
inScope = false;
if (exitThisScope) {
if (level < exitScope)
exitThisScope = false;
}
} else if (tok2->str() == "{")
++level;
else if (!pattern.empty() && ((tok2->str() == "enum" && Token::Match(tok2->next(), pattern.c_str())) || Token::Match(tok2, pattern.c_str()))) {
simplify = true;
hasClass = true;
} else if (inScope && !exitThisScope && (tok2->str() == enumType->str() || (tok2->str() == "enum" && tok2->next() && tok2->next()->str() == enumType->str()))) {
if (tok2->strAt(-1) == "::") {
// Don't replace this enum if it's preceded by "::"
} else if (tok2->next() &&
(tok2->next()->isName() || tok2->next()->str() == "(")) {
simplify = true;
hasClass = false;
} else if (tok2->previous()->str() == "(" && tok2->next()->str() == ")") {
simplify = true;
hasClass = false;
}
}
if (simplify) {
if (tok2->str() == "enum")
tok2->deleteNext();
if (typeTokenStart == 0)
tok2->str("int");
else {
Token *tok3 = typeTokenStart;
tok2->str(tok3->str());
while (tok3 != typeTokenEnd) {
tok3 = tok3->next();
tok2->insertToken(tok3->str());
tok2 = tok2->next();
}
}
if (hasClass) {
tok2->deleteNext(2);
}
simplify = false;
}
}
}
tok1 = start;
Token::eraseTokens(tok1, end->next());
if (start != list.front()) {
tok1 = start->previous();
tok1->deleteNext();
//no need to remove last token in the list
if (tok1->tokAt(2))
tok1->deleteNext();
tok = tok1;
} 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;
}
}
}
}
void Tokenizer::simplifyStd()
{
if (isC())
return;
std::set<std::string> f;
f.insert("strcat");
f.insert("strcpy");
f.insert("strncat");
f.insert("strncpy");
f.insert("free");
f.insert("malloc");
f.insert("strdup");
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() != "std")
continue;
if (Token::Match(tok->previous(), "[(,{};] std :: %var% (") &&
f.find(tok->strAt(2)) != f.end()) {
tok->deleteNext();
tok->deleteThis();
}
}
}
//---------------------------------------------------------------------------
// Helper functions for handling the tokens list
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
bool Tokenizer::IsScopeNoReturn(const Token *endScopeToken, bool *unknown) const
{
if (unknown)
*unknown = false;
if (Token::simpleMatch(endScopeToken->tokAt(-2), ") ; }")) {
const Token *tok = endScopeToken->linkAt(-2)->previous();
if (!tok)
return true;
// function pointer call..
if (Token::Match(tok->tokAt(-4), "[;{}] ( * %var% )"))
return true;
if (!tok->isName())
return false;
if (tok->str() == "exit")
return true;
while (tok && (Token::Match(tok, "::|.") || tok->isName()))
tok = tok->previous();
if (Token::Match(tok, "[;{}] %var% (")) {
if (_settings->library.isnoreturn(tok->next()->str()))
return true;
if (_settings->library.isnotnoreturn(tok->next()->str()))
return false;
if (_settings->checkLibrary && _settings->isEnabled("information")) {
reportError(tok->next(),
Severity::information,
"checkLibraryNoReturn",
"--check-library: Function " + tok->next()->str() + "() should have <noreturn> configuration");
}
}
if (Token::Match(tok, "[;{}]")) {
if (unknown)
*unknown = true;
return true;
}
}
return false;
}
//---------------------------------------------------------------------------
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?
unsigned int parentheses = 1;
unsigned int parameter = 1;
for (ftok = fpar; ftok; ftok = ftok->previous()) {
if (ftok->str() == "(") {
--parentheses;
if (parentheses == 0) {
break;
}
} else if (ftok->str() == ")") {
++parentheses;
} else if (parentheses == 1 && ftok->str() == ",") {
++parameter;
} else if (Token::Match(ftok, "[;{}]")) {
break;
}
}
// Is this a function call?
if (ftok && Token::Match(ftok->tokAt(-2), "[;{}=] %var% (")) {
const std::string functionName(ftok->previous()->str());
if (functionName == "return")
return true;
// Locate function declaration..
unsigned int indentlevel = 0;
for (const Token *tok = tokens(); tok; tok = tok->next()) {
if (tok->str() == "{")
++indentlevel;
else if (tok->str() == "}")
indentlevel = (indentlevel > 0) ? indentlevel - 1U : 0U;
else if (indentlevel == 0 && Token::Match(tok, "%type% (") && tok->str() == functionName) {
// Goto parameter
tok = tok->tokAt(2);
unsigned 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;
bool isgoto = Token::Match(begin->tokAt(-2), "goto %var% ;");
unsigned int indentlevel = 1,
indentcase = 0,
indentswitch = 0,
indentlabel = 0,
roundbraces = 0,
indentcheck = 0;
std::vector<unsigned int> switchindents;
bool checklabel = false;
Token *tok = begin;
Token *tokcheck = 0;
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 = tok->next()->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 = 0;
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<Token *>(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, "[{};] %var% : ;") && 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);
unsigned 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'
std::string labelpattern = "[{};] " + begin->previous()->str() + " : ;";
Token *start = tok->tokAt(2);
if (start && start->str() == "(")
start = start->link()->next();
if (start && start->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.
tok->deleteNext();
}
}
}
//---------------------------------------------------------------------------
void Tokenizer::syntaxError(const Token *tok) const
{
reportError(tok, Severity::error, "syntaxError", "syntax error");
}
void Tokenizer::syntaxError(const Token *tok, char c) const
{
reportError(tok, Severity::error, "syntaxError",
std::string("Invalid number of character (") + c + ") " +
"when these macros are defined: '" + _configuration + "'.");
}
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::cppcheckError(const Token *tok) const
{
reportError(tok, Severity::error, "cppcheckError",
"Analysis failed. If the code is valid then please report this failure.");
}
void Tokenizer::simplifyMathFunctions()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "atol ( %str% )")) {
if (!MathLib::isInt(tok->tokAt(2)->strValue())) {
// Ignore strings which we can't convert
continue;
}
if (tok->previous() &&
Token::simpleMatch(tok->tokAt(-2), "std ::")) {
// Delete "std ::"
tok = tok->tokAt(-2);
tok->deleteNext();
tok->deleteThis();
}
// Delete atol(
tok->deleteNext();
tok->deleteThis();
// Convert string into a number
tok->str(MathLib::longToString(MathLib::toLongNumber(tok->strValue())));
// Delete remaining )
tok->deleteNext();
}
}
}
void Tokenizer::simplifyComma()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "(" || tok->str() == "[" ||
(tok->str() == "{" && tok->previous() && tok->previous()->str() == "=")) {
tok = tok->link();
continue;
}
// Skip unhandled template specifiers..
if (Token::Match(tok, "%var% <")) {
Token* tok2 = tok->next()->link();
if (tok2)
tok = tok2;
}
if (!tok->next() || tok->str() != ",")
continue;
// We must not accept just any keyword, e.g. accepting int
// would cause function parameters to corrupt.
if (tok->strAt(1) == "delete") {
// Handle "delete a, delete b;"
tok->str(";");
}
if (tok->previous() && tok->tokAt(-2)) {
if (Token::Match(tok->tokAt(-2), "delete %var% , %var% ;") &&
tok->next()->varId() != 0) {
// Handle "delete a, b;"
tok->str(";");
tok->insertToken("delete");
} else {
for (Token *tok2 = tok->previous(); tok2; tok2 = tok2->previous()) {
if (tok2->str() == "=") {
// Handle "a = 0, b = 0;"
tok->str(";");
break;
} else if (Token::Match(tok2, "delete %var%") ||
Token::Match(tok2, "delete [ ] %var%")) {
// Handle "delete a, a = 0;"
tok->str(";");
break;
} else if (Token::Match(tok2, "[:;,{}()]")) {
break;
}
}
}
}
bool inReturn = false;
Token *startFrom = NULL; // "[;{}]" token before "return"
Token *endAt = NULL; // first ";" token after "[;{}] return"
// find "; return" pattern before comma
for (Token *tok2 = tok->previous(); tok2; tok2 = tok2->previous()) {
if (Token::Match(tok2, "[;{}]")) {
break;
} else if (tok2->str() == ")" || tok2->str() == "]" ||
(tok2->str() == "}" && tok2->link()->previous() && tok2->link()->previous()->str() == "=")) {
tok2 = tok2->link();
} else if (tok2->str() == "return" && Token::Match(tok2->previous(), "[;{}]")) {
inReturn = true;
startFrom = tok2->previous();
break;
}
}
// find token where return ends and also count commas
if (inReturn) {
std::size_t commaCounter = 0;
for (Token *tok2 = startFrom->next(); tok2; tok2 = tok2->next()) {
if (tok2->str() == ";") {
endAt = tok2;
break;
} else if (tok2->str() == "(" || tok2->str() == "[" ||
(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 (tok2->str() == "(" || tok2->str() == "[" ||
(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::removeExceptionSpecifications()
{
if (isC())
return;
for (Token* tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, ") const| throw|noexcept (")) {
if (tok->next()->str() == "const") {
Token::eraseTokens(tok->next(), tok->linkAt(3));
tok = tok->next();
} else
Token::eraseTokens(tok, tok->linkAt(2));
tok->deleteNext();
} else if (Token::Match(tok, ") const| noexcept ;|{|const")) {
if (tok->next()->str() == "const")
tok->next()->deleteNext();
else
tok->deleteNext();
}
}
}
bool Tokenizer::validate() const
{
std::stack<const Token *> linktok;
const Token *lastTok = 0;
for (const Token *tok = tokens(); tok; tok = tok->next()) {
lastTok = tok;
if (Token::Match(tok, "[{([]") || (tok->str() == "<" && tok->link())) {
if (tok->link() == 0) {
cppcheckError(tok);
return false;
}
linktok.push(tok);
}
else if (Token::Match(tok, "[})]]") || (tok->str() == ">" && tok->link())) {
if (tok->link() == 0) {
cppcheckError(tok);
return false;
}
if (linktok.empty() == true) {
cppcheckError(tok);
return false;
}
if (tok->link() != linktok.top()) {
cppcheckError(tok);
return false;
}
if (tok != tok->link()->link()) {
cppcheckError(tok);
return false;
}
linktok.pop();
}
else if (tok->link() != 0) {
cppcheckError(tok);
return false;
}
}
if (!linktok.empty()) {
cppcheckError(linktok.top());
return false;
}
// Validate that the Tokenizer::list.back() is updated correctly during simplifications
if (lastTok != list.back()) {
cppcheckError(lastTok);
return false;
}
return true;
}
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
unsigned int sz = 0; // size of stringdata
if (str[i+1] == 'x') {
sz = 2;
while (std::isxdigit(str[i+sz]) && sz < 4)
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 (MathLib::isOctalDigit(str[i+sz]) && sz < 4)
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::simplifyStructInit()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "[;{}] struct| %type% %var% = { . %type% =")) {
// Goto "." and check if the initializations have an expected format
const Token *tok2 = tok;
while (tok2->str() != ".")
tok2 = tok2->next();
while (tok2 && tok2->str() == ".") {
if (Token::Match(tok2, ". %type% = %num%|%var% [,}]"))
tok2 = tok2->tokAt(4);
else if (Token::Match(tok2, ". %type% = & %var% [,}]"))
tok2 = tok2->tokAt(5);
else
break;
if (Token::simpleMatch(tok2, ", ."))
tok2 = tok2->next();
}
if (!Token::simpleMatch(tok2, "} ;"))
continue;
// Known expression format => Perform simplification
Token *vartok = tok->tokAt(3);
if (vartok->str() == "=")
vartok = vartok->previous();
vartok->next()->str(";");
Token *tok3 = vartok->tokAt(2);
tok3->link(0);
while (Token::Match(tok3, "[{,] . %type% =")) {
tok3->str(vartok->str());
tok3->varId(vartok->varId());
tok3 = tok3->tokAt(5);
while (!Token::Match(tok3, "[,}]"))
tok3 = tok3->next();
if (tok3->str() == "}") {
tok3->deleteThis();
break;
}
tok3->previous()->insertToken(";");
}
}
}
}
void Tokenizer::simplifyComparisonOrder()
{
// Use "<" comparison instead of ">"
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "[;(] %var%|%num% >|>= %num%|%var% [);]")) {
const Token *operand2 = tok->tokAt(3);
const std::string op1(tok->next()->str());
unsigned int var1 = tok->next()->varId();
tok->next()->str(operand2->str());
tok->next()->varId(operand2->varId());
tok->tokAt(3)->str(op1);
tok->tokAt(3)->varId(var1);
if (tok->strAt(2) == ">")
tok->tokAt(2)->str("<");
else
tok->tokAt(2)->str("<=");
} else if (Token::Match(tok, "( %num% ==|!= %var% )")) {
const std::string op1(tok->next()->str());
unsigned int var1 = tok->next()->varId();
tok->next()->str(tok->strAt(3));
tok->next()->varId(tok->tokAt(3)->varId());
tok->tokAt(3)->str(op1);
tok->tokAt(3)->varId(var1);
}
}
}
void Tokenizer::simplifyConst()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->isStandardType() && tok->strAt(1) == "const") {
tok->next()->str(tok->str());
tok->str("const");
} else if (Token::Match(tok, "struct %type% const")) {
tok->tokAt(2)->str(tok->next()->str());
tok->str("const");
tok->next()->str("struct");
} else if (Token::Match(tok, "%type% const") &&
(!tok->previous() || Token::Match(tok->previous(), "[;{}(,]")) &&
tok->str().find(":") == std::string::npos &&
tok->str() != "operator") {
tok->next()->str(tok->str());
tok->str("const");
}
}
}
void Tokenizer::getErrorMessages(ErrorLogger *errorLogger, const Settings *settings)
{
Tokenizer t(settings, errorLogger);
t.syntaxError(0, ' ');
t.cppcheckError(0);
t.duplicateTypedefError(0, 0, "variable");
t.duplicateDeclarationError(0, 0, "variable");
t.duplicateEnumError(0, 0, "variable");
t.unnecessaryQualificationError(0, "type");
}
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 ( %var% = %num% ; %var% < %num% ;") &&
tok->strAt(2) == tok->strAt(6) && tok->strAt(4) == tok->strAt(8)) ||
(Token::Match(tok->previous(), "[{};] for ( %type% %var% = %num% ; %var% < %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") {
bool flowmatch = Token::findmatch(tok2, "continue|break", tok) != NULL;
// 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();
end = end->next()->link();
tok = tok->previous();
eraseDeadCode(tok, end->next());
}
}
}
void Tokenizer::simplifyErrNoInWhile()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() != "errno")
continue;
Token *endpar = 0;
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()
{
unsigned int count = 0;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (!Token::Match(tok, "while ( %var% ( %var% ) ) {"))
continue;
Token *func = tok->tokAt(2);
Token *var = tok->tokAt(4);
Token *end = tok->next()->link()->next()->link();
const unsigned int varid = ++_varId; // Create new variable
const std::string varname("cppcheck:r" + MathLib::longToString(++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()
{
// A counter that is used when giving unique names for anonymous structs.
unsigned int count = 0;
// Skip simplification of unions in class definition
std::stack<bool> 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()) {
// check for anonymous struct/union
if (Token::Match(tok, "struct|union {")) {
if (Token::Match(tok->next()->link(), "} *|&| %type% ,|;|[")) {
tok->insertToken("Anonymous" + MathLib::longToString(count++));
}
}
}
for (Token *tok = list.front(); tok; tok = tok->next()) {
Token *restart;
// 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 %type% :|{")) {
Token *start = tok;
while (Token::Match(start->previous(), "%type%"))
start = start->previous();
Token *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)
restart = next;
// check for named type
if (Token::Match(tok->next(), "*|&| %type% ,|;|[|=")) {
tok->insertToken(";");
tok = tok->next();
while (!Token::Match(start, "struct|class|union")) {
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 = restart;
}
// check for anonymous struct/union
else if (Token::Match(tok, "struct|union {")) {
bool inFunction = skip.top();
skip.push(false);
Token *tok1 = tok;
restart = tok->next();
tok = tok->next()->link();
// unnamed anonymous struct/union so possibly remove it
if (tok && tok->next() && tok->next()->str() == ";") {
if (tok1->str() == "union" && inFunction) {
// Try to create references in the union..
Token *tok2 = tok1->tokAt(2);
while (tok2) {
if (Token::Match(tok2, "%type% %var% ;"))
tok2 = tok2->tokAt(3);
else
break;
}
if (!Token::simpleMatch(tok2, "} ;"))
continue;
Token *vartok = 0;
tok2 = tok1->tokAt(2);
while (Token::Match(tok2, "%type% %var% ;")) {
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 (!(tok1->str() == "union" && !inFunction)) {
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()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::Match(tok, "__cdecl|__stdcall|__fastcall|__thiscall|__clrcall|__syscall|__pascal|__fortran|__far|__near|WINAPI|APIENTRY|CALLBACK")) {
tok->deleteThis();
}
}
}
void Tokenizer::simplifyDeclspec()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::simpleMatch(tok, "__declspec (") && tok->next()->link() && tok->next()->link()->next()) {
Token::eraseTokens(tok, tok->next()->link()->next());
tok->deleteThis();
}
}
}
void Tokenizer::simplifyAttribute()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::simpleMatch(tok, "__attribute__ (") && tok->next()->link() && tok->next()->link()->next()) {
if (Token::simpleMatch(tok->tokAt(2), "( unused )")) {
// check if after variable name
if (Token::Match(tok->next()->link()->next(), ";|=")) {
if (Token::Match(tok->previous(), "%type%"))
tok->previous()->isUnused(true);
}
// check if before variable name
else if (Token::Match(tok->next()->link()->next(), "%type%"))
tok->next()->link()->next()->isUnused(true);
}
Token::eraseTokens(tok, tok->next()->link()->next());
tok->deleteThis();
}
}
}
// Remove "volatile", "inline", "register", "restrict", "override", "final" and "constexpr"
// "restrict" keyword
// - New to 1999 ANSI/ISO C standard
// - Not in C++ standard yet
void Tokenizer::simplifyKeyword()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::Match(tok, "volatile|inline|__inline|__forceinline|register|__restrict|__restrict__")) {
tok->deleteThis();
}
}
if (_settings->standards.c >= Standards::C99) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (tok->str() == "restrict") {
tok->deleteThis();
}
}
}
if (_settings->standards.c >= Standards::C11) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (tok->str() == "_Atomic") {
tok->deleteThis();
}
}
}
if (_settings->standards.cpp >= Standards::CPP11) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
while (Token::Match(tok, "constexpr|override")) {
tok->deleteThis();
}
// final:
// void f() final; <- function is final
// struct name final { }; <- struct is final
if (Token::Match(tok, ") final [{;]") || Token::Match(tok, "%type% final [:{]"))
tok->deleteNext();
}
}
}
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, "[;{}] %var% ( %var% =") &&
Token::simpleMatch(tok->linkAt(2), ") ;") &&
!Token::Match(tok->next(), "assert|while")) {
const std::string funcname(tok->next()->str());
const Token * const vartok = tok->tokAt(3);
// Goto ',' or ')'..
for (Token *tok2 = tok->tokAt(4); tok2; tok2 = tok2->next()) {
if (tok2->str() == "(")
tok2 = tok2->link();
else if (tok2->str() == ";")
break;
else if (tok2->str() == ")" || tok2->str() == ",") {
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, "[;{}] %var% = ( {")) {
// goto the "} )"
unsigned int indentlevel = 0;
Token *tok2 = tok;
while (NULL != (tok2 = tok2->next())) {
if (tok2->str() == "(" || tok2->str() == "{")
++indentlevel;
else if (tok2->str() == ")" || tok2->str() == "}") {
if (indentlevel <= 2)
break;
--indentlevel;
}
}
if (indentlevel == 2 && Token::simpleMatch(tok2, "} )")) {
tok2 = tok2->tokAt(-3);
if (Token::Match(tok2, "[;{}] %num%|%var% ;")) {
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__| (")) {
// 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")) {
const Token *tok2 = tok;
while (tok2 && tok2->linenr() == tok->linenr() && (tok2->isNumber() || tok2->isName() || tok2->str() == ","))
tok2 = tok2->next();
if (!tok2 || tok2->str() == ";" || tok2->linenr() != tok->linenr()) {
instruction = tok->next()->stringifyList(tok2);
Token::eraseTokens(tok, tok2);
if (!tok2 || tok2->str() != ";")
tok->insertToken(";");
} else
continue;
}
else
continue;
// insert "asm ( "instruction" )"
tok->str("asm");
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()) {
unsigned int endposition = tok->next()->linenr();
tok = tok->tokAt(-3);
for (int i = 0; i < 4; ++i) {
tok = tok->next();
tok->linenr(endposition);
}
}
}
}
// 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 = 0;
if (Token::Match(tok, ";|{|}|public:|protected:|private: const| %type% %var% :") &&
!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 (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 (Token::Match(tok, ";|{|}|public:|protected:|private: const| %type% : %any% ;") &&
tok->next()->str() != "default") {
const bool offset = (tok->next()->str() == "const");
if (!Token::Match(tok->tokAt(3 + (offset ? 1 : 0)), "[{};]")) {
tok->deleteNext(4 + (offset ? 1 : 0));
goback = true;
}
}
if (last && last->str() == ",") {
Token *tok1 = last;
tok1->str(";");
Token *tok2 = tok->next();
tok1->insertToken(tok2->str());
tok1 = tok1->next();
tok1->isSigned(tok2->isSigned());
tok1->isUnsigned(tok2->isUnsigned());
tok1->isLong(tok2->isLong());
}
}
}
// Remove __builtin_expect(...), likely(...), and unlikely(...)
void Tokenizer::simplifyBuiltinExpect()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok->next(), "__builtin_expect (")) {
// Count parentheses for tok2
const Token* end = tok->linkAt(2);
for (Token *tok2 = tok->tokAt(3); tok2 != end; tok2 = tok2->next()) {
if (tok2->str() == "(") {
tok2 = tok2->link();
} else if (tok2->str() == ",") {
if (Token::Match(tok2, ", %num% )")) {
tok->deleteNext();
tok2->deleteNext();
tok2->deleteThis();
}
break;
}
}
} else if (Token::Match(tok->next(), "likely|unlikely (")) {
// remove closing ')'
tok->linkAt(2)->deleteThis();
// remove "likely|unlikely ("
tok->deleteNext(2);
}
}
}
// Add std:: in front of std classes, when using namespace std; was given
void Tokenizer::simplifyNamespaceStd()
{
if (!isCPP())
return;
static const char* stdTypes_[] = { // Types and objects in std namespace that are neither functions nor templates
"string", "wstring",
"iostream", "ostream", "ofstream", "ostringstream", "istream", "ifstream", "istringstream", "fstream", "stringstream",
"stringbuf", "streambuf", "ios", "filebuf", "ios_base",
"exception", "bad_exception",
"logic_error", "domain_error", "invalid_argument_", "length_error", "out_of_rage", "runtime_error", "range_error", "overflow_error", "underflow_error",
"locale",
"cout", "cerr", "clog", "cin", "endl",
"fpos", "streamoff", "streampos", "streamsize"
};
static const std::set<std::string> stdTypes(stdTypes_, stdTypes_+sizeof(stdTypes_)/sizeof(*stdTypes_));
static const char* stdTemplates_[] = {
"basic_string", "bitset", "deque", "list", "map", "multimap", "priority_queue", "queue", "set", "stack", "vector", "pair",
"iterator", "iterator_traits"
};
static const std::set<std::string> stdTemplates(stdTemplates_, stdTemplates_+sizeof(stdTemplates_)/sizeof(*stdTemplates_));
static const char* 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"
};
static const std::set<std::string> stdFunctions(stdFunctions_, stdFunctions_+sizeof(stdFunctions_)/sizeof(*stdFunctions_));
for (const Token* tok = Token::findsimplematch(list.front(), "using namespace std ;"); tok; tok = tok->next()) {
bool insert = false;
if (Token::Match(tok, "%var% (") && !Token::Match(tok->previous(), ".|::") && stdFunctions.find(tok->str()) != stdFunctions.end())
insert = true;
else if (Token::Match(tok, "%var% <") && !Token::Match(tok->previous(), ".|::") && stdTemplates.find(tok->str()) != stdTemplates.end())
insert = true;
else if (tok->isName() && !tok->varId() && !Token::Match(tok->next(), "(|<") && !Token::Match(tok->previous(), ".|::") && 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 (_settings->standards.cpp == Standards::CPP11 && Token::Match(tok, "!!:: tr1 ::"))
tok->next()->str("std");
}
for (Token* tok = list.front(); tok; tok = tok->next()) {
if (_settings->standards.cpp == Standards::CPP11 && 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();
}
}
}
// Remove Microsoft MFC 'DECLARE_MESSAGE_MAP()'
void Tokenizer::simplifyMicrosoftMFC()
{
// skip if not Windows
if (!(_settings->platformType == Settings::Win32A ||
_settings->platformType == Settings::Win32W ||
_settings->platformType == Settings::Win64))
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok->next(), "DECLARE_MESSAGE_MAP ( )")) {
tok->deleteNext(3);
} else if (Token::Match(tok->next(), "DECLARE_DYNAMIC|DECLARE_DYNAMIC_CLASS|DECLARE_DYNCREATE ( %any% )")) {
tok->deleteNext(4);
}
}
}
void Tokenizer::simplifyMicrosoftMemoryFunctions()
{
// skip if not Windows
if (!(_settings->platformType == Settings::Win32A ||
_settings->platformType == Settings::Win32W ||
_settings->platformType == Settings::Win64))
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
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)
}
}
}
void Tokenizer::simplifyMicrosoftStringFunctions()
{
// skip if not Windows
if (_settings->platformType == Settings::Win32A) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok, "_topen (")) {
tok->str("open");
} else if (Token::simpleMatch(tok, "_tfopen (")) {
tok->str("fopen");
} else if (Token::simpleMatch(tok, "_tcscat (")) {
tok->str("strcat");
} else if (Token::simpleMatch(tok, "_tcschr (")) {
tok->str("strchr");
} else if (Token::simpleMatch(tok, "_tcscmp (")) {
tok->str("strcmp");
} else if (Token::simpleMatch(tok, "_tcsdup (")) {
tok->str("strdup");
} else if (Token::simpleMatch(tok, "_tcscpy (")) {
tok->str("strcpy");
} else if (Token::simpleMatch(tok, "_tcslen (")) {
tok->str("strlen");
} else if (Token::simpleMatch(tok, "_tcsncat (")) {
tok->str("strncat");
} else if (Token::simpleMatch(tok, "_tcsncpy (")) {
tok->str("strncpy");
} else if (Token::simpleMatch(tok, "_tcsnlen (")) {
tok->str("strnlen");
} else if (Token::simpleMatch(tok, "_tcsrchr (")) {
tok->str("strrchr");
} else if (Token::simpleMatch(tok, "_tcsstr (")) {
tok->str("strstr");
} else if (Token::simpleMatch(tok, "_tcstok (")) {
tok->str("strtok");
} else if (Token::simpleMatch(tok, "_tprintf (")) {
tok->str("printf");
} else if (Token::simpleMatch(tok, "_stprintf (")) {
tok->str("sprintf");
} else if (Token::simpleMatch(tok, "_sntprintf (")) {
tok->str("snprintf");
} else if (Token::simpleMatch(tok, "_tscanf (")) {
tok->str("scanf");
} else if (Token::simpleMatch(tok, "_stscanf (")) {
tok->str("sscanf");
} else if (Token::Match(tok, "_T ( %char%|%str% )")) {
tok->deleteNext();
tok->deleteThis();
tok->deleteNext();
}
}
} else if (_settings->platformType == Settings::Win32W ||
_settings->platformType == Settings::Win64) {
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::simpleMatch(tok, "_tcscat (")) {
tok->str("wcscat");
} else if (Token::simpleMatch(tok, "_tcschr (")) {
tok->str("wcschr");
} else if (Token::simpleMatch(tok, "_tcscmp (")) {
tok->str("wcscmp");
} else if (Token::simpleMatch(tok, "_tcscpy (")) {
tok->str("wcscpy");
} else if (Token::simpleMatch(tok, "_tcsdup (")) {
tok->str("wcsdup");
} else if (Token::simpleMatch(tok, "_tcslen (")) {
tok->str("wcslen");
} else if (Token::simpleMatch(tok, "_tcsncat (")) {
tok->str("wcsncat");
} else if (Token::simpleMatch(tok, "_tcsncpy (")) {
tok->str("wcsncpy");
} else if (Token::simpleMatch(tok, "_tcsnlen (")) {
tok->str("wcsnlen");
} else if (Token::simpleMatch(tok, "_tcsrchr (")) {
tok->str("wcsrchr");
} else if (Token::simpleMatch(tok, "_tcsstr (")) {
tok->str("wcsstr");
} else if (Token::simpleMatch(tok, "_tcstok (")) {
tok->str("wcstok");
} else if (Token::simpleMatch(tok, "_tprintf (")) {
tok->str("wprintf");
} else if (Token::simpleMatch(tok, "_stprintf (")) {
tok->str("swprintf");
} else if (Token::simpleMatch(tok, "_sntprintf (")) {
tok->str("snwprintf");
} else if (Token::simpleMatch(tok, "_tscanf (")) {
tok->str("wscanf");
} else if (Token::simpleMatch(tok, "_stscanf (")) {
tok->str("swscanf");
} else if (Token::Match(tok, "_T ( %char%|%str% )")) {
tok->deleteNext();
tok->deleteThis();
tok->deleteNext();
}
}
}
}
// Remove Borland code
void Tokenizer::simplifyBorland()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "( __closure * %var% )")) {
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 %var% :|{")) {
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()
{
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 %var% (") &&
Token::simpleMatch(tok->linkAt(2), ") ;")) {
tok->deleteThis();
} else if (!Token::Match(tok, "class %var% :"))
continue;
if (tok->previous() && tok->previous()->str() == "enum") {
tok = tok->tokAt(2);
continue;
}
// count { and } for tok2
unsigned 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() == "}") {
--indentlevel;
if (indentlevel == 0)
break;
}
if (tok2->strAt(1) == "Q_OBJECT") {
tok2->deleteNext();
} else 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 %var% (") &&
Token::simpleMatch(tok2->linkAt(3), ") ;")) {
tok2->deleteNext();
}
}
}
}
void Tokenizer::createSymbolDatabase()
{
if (!_symbolDatabase) {
_symbolDatabase = new SymbolDatabase(this, _settings, _errorLogger);
// Set scope pointers
for (std::list<Scope>::iterator scope = _symbolDatabase->scopeList.begin(); scope != _symbolDatabase->scopeList.end(); ++scope) {
Token* start = const_cast<Token*>(scope->classStart);
Token* end = const_cast<Token*>(scope->classEnd);
if (scope->type == Scope::eGlobal) {
start = const_cast<Token*>(list.front());
end = const_cast<Token*>(list.back());
}
if (start && end) {
start->scope(&*scope);
end->scope(&*scope);
}
if (start != end && start->next() != end) {
for (Token* tok = start->next(); tok != end; tok = tok->next()) {
if (tok->str() == "{") {
bool break2 = false;
for (std::list<Scope*>::const_iterator innerScope = scope->nestedList.begin(); innerScope != scope->nestedList.end(); ++innerScope) {
if (tok == (*innerScope)->classStart) { // Is begin of inner scope
tok = tok->link();
if (!tok || tok->next() == end || !tok->next()) {
break2 = true;
break;
}
tok = tok->next();
break;
}
}
if (break2)
break;
}
tok->scope(&*scope);
}
}
}
// Set function pointers
for (Token* tok = list.front(); tok != list.back(); tok = tok->next()) {
if (Token::Match(tok, "%var% (")) {
tok->function(_symbolDatabase->findFunction(tok));
}
}
// Set variable pointers
for (Token* tok = list.front(); tok != list.back(); tok = tok->next()) {
if (tok->varId())
tok->variable(_symbolDatabase->getVariableFromVarId(tok->varId()));
// Set Token::variable pointer for array member variable
// Since it doesn't point at a fixed location it doesn't have varid
if (tok->variable() != NULL &&
tok->variable()->typeScope() &&
Token::Match(tok, "%var% [")) {
// Locate "]"
Token *tok2 = tok->next();
while (tok2 && tok2->str() == "[")
tok2 = tok2->link()->next();
Token *membertok = NULL;
if (Token::Match(tok2, ". %var%"))
membertok = tok2->next();
else if (Token::Match(tok2, ") . %var%") && tok->strAt(-1) == "(")
membertok = tok2->tokAt(2);
if (membertok) {
const Variable *var = tok->variable();
const Variable *membervar = var->typeScope()->getVariable(membertok->str());
if (membervar)
membertok->variable(membervar);
}
}
}
}
}
void Tokenizer::deleteSymbolDatabase()
{
// Clear scope, function, and variable pointers
for (Token* tok = list.front(); tok != list.back(); tok = tok->next()) {
tok->scope(0);
tok->function(0);
tok->variable(0);
}
delete _symbolDatabase;
_symbolDatabase = 0;
}
void Tokenizer::simplifyOperatorName()
{
if (isC())
return;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (tok->str() == "operator") {
// operator op
std::string op;
Token *par = tok->next();
bool done = false;
while (!done && par) {
done = true;
if (par && par->isName()) {
op += par->str();
par = par->next();
// merge namespaces eg. 'operator std :: string () const {'
if (par && par->str() == "::" && par->next() && par->next()->isName()) {
op += par->str();
par = par->next();
}
done = false;
}
if (Token::Match(par, ".|%op%")) {
op += par->str();
par = par->next();
done = false;
}
if (Token::simpleMatch(par, "[ ]")) {
op += "[]";
par = par->tokAt(2);
done = false;
}
if (Token::Match(par, "( *| )")) {
// break out and simplify..
if (Token::Match(par, "( ) const| [=;{),]"))
break;
while (par->str() != ")") {
op += par->str();
par = par->next();
}
op += ")";
par = par->next();
done = false;
}
}
if (par && Token::Match(par->link(), ") const| [=;{),]")) {
tok->str("operator" + op);
Token::eraseTokens(tok, par);
}
}
}
}
// remove unnecessary member qualification..
void Tokenizer::removeUnnecessaryQualification()
{
if (isC())
return;
std::vector<Space> classInfo;
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "class|struct|namespace %type% :|{") &&
(!tok->previous() || (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.classEnd = tok->link();
classInfo.push_back(info);
} else if (!classInfo.empty()) {
if (tok == classInfo.back().classEnd)
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| {|;|:")) {
std::string qualification = tok->str() + "::";
// check for extra qualification
/** @todo this should be made more generic to handle more levels */
if (Token::Match(tok->tokAt(-2), "%type% ::")) {
if (classInfo.size() >= 2) {
if (classInfo.at(classInfo.size() - 2).className != tok->strAt(-2))
continue;
else
qualification = tok->strAt(-2) + "::" + qualification;
} else
continue;
}
if (_settings && _settings->isEnabled("portability"))
unnecessaryQualificationError(tok, qualification);
tok->deleteNext();
tok->deleteThis();
}
}
}
}
}
void Tokenizer::unnecessaryQualificationError(const Token *tok, const std::string &qualification) const
{
reportError(tok, Severity::portability, "unnecessaryQualification",
"The extra qualification \'" + qualification + "\' is unnecessary and is considered an error by many compilers.");
}
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 (unsigned char 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 ','
Token *end = tok->next()->nextArgument()->tokAt(-2);
//all the first argument is copied
copyTokens(tok2, tok->next(), end);
tok2->insertToken("return");
}
}
}
void Tokenizer::printUnknownTypes()
{
std::set<std::string> unknowns;
for (unsigned int i = 1; i <= _varId; ++i) {
const Variable *var = _symbolDatabase->getVariableFromVarId(i);
// is unknown type?
if (var && !var->type() && !var->typeStartToken()->isStandardType()) {
std::string name;
// single token type?
if (var->typeStartToken() == var->typeEndToken())
name = var->typeStartToken()->str();
// complicated type
else {
const Token *tok = var->typeStartToken();
int level = 0;
while (tok) {
// skip pointer and reference part of type
if (level == 0 && (tok->str() == "*" || tok->str() == "&"))
break;
name += tok->str();
if (Token::Match(tok, "struct|union"))
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(name);
}
}
if (!unknowns.empty()) {
std::ostringstream ss;
ss << unknowns.size() << " unknown types:" << std::endl;
std::set<std::string>::const_iterator it;
std::size_t count = 1;
for (it = unknowns.begin(); it != unknowns.end(); ++it, ++count)
ss << count << ": " << *it << std::endl;
if (_errorLogger)
_errorLogger->reportOut(ss.str());
}
}
void Tokenizer::simplifyMathExpressions()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
if (Token::Match(tok,"exp|cosh|cos ( 0 )") || Token::simpleMatch(tok,"sqrt ( 1 )")) {
tok->deleteNext(3);
tok->str("1");
}
if (Token::Match(tok,"sin|sinh|sqrt ( 0 )") || Token::simpleMatch(tok,"ln ( 1 )")) {
tok->deleteNext(3);
tok->str("0");
}
//Pythagorean trigonometric identity: pow(sin(x),2)+pow(cos(x),2) = 1
//Hyperbolic identity: pow(sinh(x),2)-pow(cosh(x),2) = -1
if (Token::simpleMatch(tok, "pow (")) {
if (Token::simpleMatch(tok->tokAt(2), "sin (")) {
Token *tok2 = tok->linkAt(3);
if (!Token::simpleMatch(tok2, ") , 2 ) + pow ( cos ("))
continue;
Token *tok3 = tok2->tokAt(8);
if (!Token::simpleMatch(tok3->link(), ") , 2 )"))
continue;
if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok3->link()->next())) {
Token::eraseTokens(tok, tok3->link()->tokAt(4));
tok->str("1");
}
} else if (Token::simpleMatch(tok->tokAt(2), "sinh (")) {
Token *tok2 = tok->linkAt(3);
if (!Token::simpleMatch(tok2, ") , 2 ) - pow ( cosh ("))
continue;
Token *tok3 = tok2->tokAt(8);
if (!Token::simpleMatch(tok3->link(), ") , 2 )"))
continue;
if (tok->tokAt(3)->stringifyList(tok2->next()) == tok3->stringifyList(tok3->link()->next())) {
Token::eraseTokens(tok, tok3->link()->tokAt(4));
tok->str("-1");
}
}
}
}
}
const std::string& Tokenizer::getSourceFilePath() const
{
if (list.getFiles().empty()) {
static const std::string empty;
return empty;
}
return list.getFiles()[0];
}
bool Tokenizer::isC() const
{
return _settings->enforcedLang == Settings::C || (_settings->enforcedLang == Settings::None && Path::isC(getSourceFilePath()));
}
bool Tokenizer::isCPP() const
{
return _settings->enforcedLang == Settings::CPP || (_settings->enforcedLang == Settings::None && Path::isCPP(getSourceFilePath()));
}
void Tokenizer::reportError(const Token* tok, const Severity::SeverityType severity, const std::string& id, const std::string& msg, bool inconclusive) const
{
const std::list<const Token*> callstack(1, tok);
reportError(callstack, severity, id, msg, inconclusive);
}
void Tokenizer::reportError(const std::list<const Token*>& callstack, Severity::SeverityType severity, const std::string& id, const std::string& msg, bool inconclusive) const
{
ErrorLogger::ErrorMessage errmsg(callstack, &list, severity, id, msg, inconclusive);
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
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