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cppcheck/lib/tokenize.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 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/>.
*/
//---------------------------------------------------------------------------
#ifdef _MSC_VER
#pragma warning(disable: 4503)
#endif
#include "tokenize.h"
#include "token.h"
#include "filelister.h"
#include "mathlib.h"
#include "settings.h"
#include "errorlogger.h"
#include "check.h"
#include "classinfo.h"
#include <locale>
#include <fstream>
#include <string>
#include <cstring>
#include <iostream>
#include <sstream>
#include <list>
#include <cassert>
#include <algorithm>
#include <cctype>
#include <stack>
#include <stdexcept> // for std::runtime_error
//---------------------------------------------------------------------------
Tokenizer::Tokenizer()
: _settings(0), _errorLogger(0)
{
_tokens = 0;
_tokensBack = 0;
}
Tokenizer::Tokenizer(const Settings *settings, ErrorLogger *errorLogger)
: _settings(settings), _errorLogger(errorLogger)
{
_tokens = 0;
_tokensBack = 0;
}
Tokenizer::~Tokenizer()
{
deallocateTokens();
}
//---------------------------------------------------------------------------
// Helper functions..
//---------------------------------------------------------------------------
const Token *Tokenizer::tokens() const
{
return _tokens;
}
const std::vector<std::string> *Tokenizer::getFiles() const
{
return &_files;
}
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// addtoken
// add a token. Used by 'Tokenizer'
//---------------------------------------------------------------------------
void Tokenizer::addtoken(const char str[], const unsigned int lineno, const unsigned int fileno, bool split)
{
if (str[0] == 0)
return;
// If token contains # characters, split it up
if (split && strstr(str, "##"))
{
std::string temp;
for (unsigned int i = 0; str[i]; ++i)
{
if (strncmp(&str[i], "##", 2) == 0)
{
addtoken(temp.c_str(), lineno, fileno, false);
temp.clear();
addtoken("##", lineno, fileno, false);
++i;
}
else
temp += str[i];
}
addtoken(temp.c_str(), lineno, fileno, false);
return;
}
// Replace hexadecimal value with decimal
std::ostringstream str2;
if (strncmp(str, "0x", 2) == 0)
{
str2 << std::strtoul(str + 2, NULL, 16);
}
else
{
str2 << str;
}
if (_tokensBack)
{
_tokensBack->insertToken(str2.str().c_str());
}
else
{
_tokens = new Token(&_tokensBack);
_tokensBack = _tokens;
_tokensBack->str(str2.str());
}
_tokensBack->linenr(lineno);
_tokensBack->fileIndex(fileno);
}
void Tokenizer::addtoken(const Token * tok, const unsigned int lineno, const unsigned int fileno)
{
if (tok == 0)
return;
// Replace hexadecimal value with decimal
std::ostringstream str2;
if (strncmp(tok->str().c_str(), "0x", 2) == 0)
{
str2 << std::strtoul(tok->str().c_str() + 2, NULL, 16);
}
else
{
str2 << tok->str();
}
if (_tokensBack)
{
_tokensBack->insertToken(str2.str().c_str());
}
else
{
_tokens = new Token(&_tokensBack);
_tokensBack = _tokens;
_tokensBack->str(str2.str());
}
_tokensBack->linenr(lineno);
_tokensBack->fileIndex(fileno);
_tokensBack->isUnsigned(tok->isUnsigned());
_tokensBack->isSigned(tok->isSigned());
_tokensBack->isLong(tok->isLong());
_tokensBack->isUnused(tok->isUnused());
}
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// SizeOfType - gives the size of a type
//---------------------------------------------------------------------------
unsigned int Tokenizer::sizeOfType(const Token *type) const
{
if (!type || type->str().empty())
return 0;
if (type->str()[0] == '"')
return static_cast<unsigned int>(Token::getStrLength(type) + 1);
std::map<std::string, unsigned int>::const_iterator it = _typeSize.find(type->strAt(0));
if (it == _typeSize.end())
return 0;
else if (type->isLong())
{
if (type->str() == "double")
return sizeof(long double);
else if (type->str() == "long")
return sizeof(long long);
}
return it->second;
}
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// InsertTokens - Copy and insert tokens
//---------------------------------------------------------------------------
void Tokenizer::insertTokens(Token *dest, const Token *src, unsigned int n)
{
while (n > 0)
{
dest->insertToken(src->str().c_str());
dest = dest->next();
dest->fileIndex(src->fileIndex());
dest->linenr(src->linenr());
dest->varId(src->varId());
dest->isUnsigned(src->isUnsigned());
dest->isSigned(src->isSigned());
dest->isLong(src->isLong());
src = src->next();
--n;
}
}
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// Tokenize - tokenizes a given file.
//---------------------------------------------------------------------------
void Tokenizer::createTokens(std::istream &code)
{
// line number in parsed code
unsigned int lineno = 1;
// The current token being parsed
std::string CurrentToken;
// lineNumbers holds line numbers for files in fileIndexes
// every time an include file is complitely parsed, last item in the vector
// is removed and lineno is set to point to that value.
std::vector<unsigned int> lineNumbers;
// fileIndexes holds index for _files vector about currently parsed files
// every time an include file is complitely parsed, last item in the vector
// is removed and FileIndex is set to point to that value.
std::vector<unsigned int> fileIndexes;
// FileIndex. What file in the _files vector is read now?
unsigned int FileIndex = 0;
// Read one byte at a time from code and create tokens
for (char ch = (char)code.get(); code.good(); ch = (char)code.get())
{
// char/string..
// multiline strings are not handled. The preprocessor should handle that for us.
if (ch == '\'' || ch == '\"')
{
std::string line;
// read char
bool special = false;
char c = ch;
do
{
// Append token..
line += c;
// Special sequence '\.'
if (special)
special = false;
else
special = (c == '\\');
// Get next character
c = (char)code.get();
}
while (code.good() && (special || c != ch));
line += ch;
// Handle #file "file.h"
if (CurrentToken == "#file")
{
// Extract the filename
line = line.substr(1, line.length() - 2);
// Has this file been tokenized already?
++lineno;
bool foundOurfile = false;
fileIndexes.push_back(FileIndex);
for (unsigned int i = 0; i < _files.size(); i++)
{
if (getFileLister()->sameFileName(_files[i].c_str(), line.c_str()))
{
// Use this index
foundOurfile = true;
FileIndex = i;
}
}
if (!foundOurfile)
{
// The "_files" vector remembers what files have been tokenized..
_files.push_back(getFileLister()->simplifyPath(line.c_str()));
FileIndex = static_cast<unsigned int>(_files.size() - 1);
}
lineNumbers.push_back(lineno);
lineno = 0;
}
else
{
// Add previous token
addtoken(CurrentToken.c_str(), lineno, FileIndex);
// Add content of the string
addtoken(line.c_str(), lineno, FileIndex);
}
CurrentToken.clear();
continue;
}
if (strchr("+-*/%&|^?!=<>[](){};:,.~\n ", ch))
{
if (ch == '.' &&
CurrentToken.length() > 0 &&
std::isdigit(CurrentToken[0]))
{
// Don't separate doubles "5.4"
}
else if (strchr("+-", ch) &&
CurrentToken.length() > 0 &&
std::isdigit(CurrentToken[0]) &&
(CurrentToken[CurrentToken.length()-1] == 'e' ||
CurrentToken[CurrentToken.length()-1] == 'E'))
{
// Don't separate doubles "4.2e+10"
}
else if (ch=='&' && CurrentToken.empty() && code.peek() == '&')
{
// &&
ch = code.get();
addtoken("&&", lineno, FileIndex, true);
continue;
}
else
{
if (CurrentToken == "#file")
{
// Handle this where strings are handled
continue;
}
else if (CurrentToken == "#endfile")
{
if (lineNumbers.empty() || fileIndexes.empty())
{
cppcheckError(0);
deallocateTokens();
return;
}
lineno = lineNumbers.back();
lineNumbers.pop_back();
FileIndex = fileIndexes.back();
fileIndexes.pop_back();
CurrentToken.clear();
continue;
}
addtoken(CurrentToken.c_str(), lineno, FileIndex, true);
CurrentToken.clear();
if (ch == '\n')
{
++lineno;
continue;
}
else if (ch == ' ')
{
continue;
}
CurrentToken += ch;
// Add "++", "--" or ">>" token
if ((ch == '+' || ch == '-' || ch == '>') && (code.peek() == ch))
CurrentToken += (char)code.get();
addtoken(CurrentToken.c_str(), lineno, FileIndex);
CurrentToken.clear();
continue;
}
}
CurrentToken += ch;
}
addtoken(CurrentToken.c_str(), lineno, FileIndex, true);
}
void Tokenizer::duplicateTypedefError(const Token *tok1, const Token *tok2, const std::string &type)
{
if (!(_settings && _settings->_checkCodingStyle))
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok1->linenr();
loc.setfile(file(tok1));
locationList.push_back(loc);
loc.line = tok2->linenr();
loc.setfile(file(tok2));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::style,
std::string(type + " '" + tok2->str() +
"' hides typedef with same name"),
"variableHidingTypedef");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
void Tokenizer::duplicateDeclarationError(const Token *tok1, const Token *tok2, const std::string &type)
{
if (!(_settings && _settings->_checkCodingStyle))
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok1->linenr();
loc.setfile(file(tok1));
locationList.push_back(loc);
loc.line = tok2->linenr();
loc.setfile(file(tok2));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::style,
std::string(type + " '" + tok2->str() +
"' forward declaration unnecessary, already declared"),
"unnecessaryForwardDeclaration");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
// check if this statement is a duplicate definition
bool Tokenizer::duplicateTypedef(Token **tokPtr, const Token *name)
{
// 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
int level = 0;
while (end && 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();
}
end = end->next();
}
else if (end->str() == "(")
{
if (tok->previous()->str() == "operator")
{
// 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;
duplicateTypedefError(*tokPtr, name, "Template instantiation");
*tokPtr = end->link();
return true;
}
else if (Token::Match(tok->previous(), "%type%"))
{
if (end->link()->next()->str() == "{")
{
duplicateTypedefError(*tokPtr, name, "Function");
*tokPtr = end->link()->next()->link();
return true;
}
}
}
if (end)
{
if (Token::Match(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|}|>") ||
(tok->previous()->str() == "*" && tok->next()->str() != "(") ||
(Token::Match(tok->previous(), "%type%") &&
(!Token::Match(tok->previous(), "return|new|const|friend|public|private|protected|throw") &&
!Token::Match(tok->tokAt(-2), "friend class"))))
{
// scan backwards for the end of the previous statement
int level = (tok->previous()->str() == "}") ? 1 : 0;
while (tok && tok->previous() && (!Token::Match(tok->previous(), ";|{") || (level != 0)))
{
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->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;
}
}
else if (tok->previous()->str() == "{")
level--;
tok = tok->previous();
}
duplicateTypedefError(*tokPtr, name, "Variable");
return true;
}
}
}
}
return false;
}
struct SpaceInfo
{
bool isNamespace;
std::string className;
const Token * classEnd;
};
void Tokenizer::simplifyTypedef()
{
std::vector<SpaceInfo> spaceInfo;
bool isNamespace = false;
std::string className;
bool hasClass = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "class|struct|namespace %any%"))
{
isNamespace = (tok->str() == "namespace");
hasClass = true;
className = tok->next()->str();
continue;
}
else if (hasClass && tok->str() == ";")
{
hasClass = false;
continue;
}
else if (hasClass && tok->str() == "{")
{
SpaceInfo 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;
std::string name;
bool isConst = false;
if (tok->next()->str() == "const")
{
tok->next()->deleteThis();
isConst = true;
}
if (tok->tokAt(2)->str() == "{") // unnamed
{
tok1 = tok->tokAt(2)->link();
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 long count = 0;
name = "Unnamed" + MathLib::toString<long>(count++);
}
tok->tokAt(1)->insertToken(name.c_str());
}
else
continue;
}
else // has a name
{
tok1 = tok->tokAt(3)->link();
if (!tok1)
continue;
name = tok->tokAt(2)->str();
}
tok1->insertToken(";");
tok1 = tok1->next();
tok1->insertToken("typedef");
tok1 = tok1->next();
Token * tok3 = tok1;
if (isConst)
{
tok1->insertToken("const");
tok1 = tok1->next();
}
tok1->insertToken(tok->next()->strAt(0)); // struct, union or enum
tok1 = tok1->next();
tok1->insertToken(name.c_str());
tok->deleteThis();
tok = tok3;
}
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 *const1 = 0;
Token *const2 = 0;
int offset = 1;
bool function = false;
bool functionPtr = false;
bool functionRef = false;
bool functionRetFuncPtr = false;
bool functionPtrRetFuncPtr = false;
bool ptrToArray = false;
bool refToArray = false;
bool ptrMember = false;
Token *namespaceStart = 0;
Token *namespaceEnd = 0;
if (Token::Match(tok->next(), "::") ||
Token::Match(tok->next(), "%type%"))
{
typeStart = tok->next();
offset = 1;
if (Token::Match(typeStart, "const"))
offset++;
typeEnd = tok->tokAt(offset++);
bool atEnd = false;
while (!atEnd)
{
if (Token::Match(tok->tokAt(offset), "::"))
typeEnd = tok->tokAt(offset++);
if (Token::Match(tok->tokAt(offset), "%type%") &&
tok->tokAt(offset + 1) && !Token::Match(tok->tokAt(offset + 1), "[|;|,|("))
typeEnd = tok->tokAt(offset++);
else if (Token::Match(tok->tokAt(offset), "const ("))
{
typeEnd = tok->tokAt(offset++);
atEnd = true;
}
else
atEnd = true;
}
}
else
continue; // invalid input
// check for template
if (tok->tokAt(offset)->str() == "<")
{
int level = 1;
int paren = 0;
typeEnd = tok->tokAt(offset + 1);
for (; typeEnd ; typeEnd = typeEnd->next())
{
if (typeEnd->str() == ">")
{
if (paren == 0)
{
level--;
if (level == 0)
break;
}
}
else if (typeEnd->str() == "<")
{
if (paren == 0)
level++;
}
else if (typeEnd->str() == "(")
paren++;
else if (typeEnd->str() == ")")
paren--;
}
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;
offset = 1;
}
// check for pointers and references
while (Token::Match(tok->tokAt(offset), "*|&|const"))
pointers.push_back(tok->tokAt(offset++)->str());
if (Token::Match(tok->tokAt(offset), "%type%"))
{
// found the type name
typeName = tok->tokAt(offset++);
// check for array
if (tok->tokAt(offset) && tok->tokAt(offset)->str() == "[")
{
arrayStart = tok->tokAt(offset);
bool atEnd = false;
while (!atEnd)
{
while (tok->tokAt(offset + 1) && !Token::Match(tok->tokAt(offset + 1), ";|,"))
offset++;
if (!tok->tokAt(offset + 1))
return; // invalid input
else if (tok->tokAt(offset + 1)->str() == ";")
atEnd = true;
else if (tok->tokAt(offset)->str() == "]")
atEnd = true;
else
offset++;
}
arrayEnd = tok->tokAt(offset++);
}
// check for end or another
if (Token::Match(tok->tokAt(offset), ";|,"))
tok = tok->tokAt(offset);
// or a function typedef
else if (Token::Match(tok->tokAt(offset), "("))
{
function = true;
if (tok->tokAt(offset)->link()->next())
{
argStart = tok->tokAt(offset);
argEnd = tok->tokAt(offset)->link();
tok = argEnd->next();
}
else
{
// internal error
continue;
}
}
else
{
// unhandled typedef, skip it and continue
tok = tok->tokAt(offset);
continue;
}
}
else if (Token::Match(tok->tokAt(offset), "( *|&| const|volatile| const|volatile| %type% ) ("))
{
functionPtr = tok->tokAt(offset + 1)->str() == "*";
functionRef = tok->tokAt(offset + 1)->str() == "&";
function = tok->tokAt(offset + 2)->str() == ")";
if (!function)
{
offset++;
if (Token::Match(tok->tokAt(offset + 1), "const|volatile"))
{
const1= tok->tokAt(offset + 1);
offset++;
if (Token::Match(tok->tokAt(offset + 1), "const|volatile"))
{
const2 = tok->tokAt(offset + 1);
offset++;
}
}
}
if (tok->tokAt(offset + 3)->link()->next())
{
typeName = tok->tokAt(offset + 1);
argStart = tok->tokAt(offset + 3);
argEnd = tok->tokAt(offset + 3)->link();
tok = argEnd->next();
}
else
{
// internal error
continue;
}
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();
}
}
else if (Token::Match(tok->tokAt(offset), "( ::| %var% :: *|&| const|volatile| const|volatile| %type% ) ("))
{
namespaceStart = tok->tokAt(offset + 1);
if (tok->tokAt(offset + 1)->str() == "::")
offset++;
namespaceEnd = tok->tokAt(offset + 2);
functionPtr = tok->tokAt(offset + 3)->str() == "*";
functionRef = tok->tokAt(offset + 3)->str() == "&";
function = tok->tokAt(offset + 4)->str() == ")";
if (!function)
{
offset++;
if (Token::Match(tok->tokAt(offset + 3), "const|volatile"))
{
const1 = tok->tokAt(offset + 3);
offset++;
if (Token::Match(tok->tokAt(offset + 3), "const|volatile"))
{
const2 = tok->tokAt(offset + 3);
offset++;
}
}
}
if (tok->tokAt(offset + 5)->link()->next())
{
typeName = tok->tokAt(offset + 3);
argStart = tok->tokAt(offset + 5);
argEnd = tok->tokAt(offset + 5)->link();
tok = argEnd->next();
}
else
{
// internal error
continue;
}
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();
}
}
else if (Token::Match(tok->tokAt(offset), "( %type% ("))
{
function = true;
if (tok->tokAt(offset)->link()->next())
{
typeName = tok->tokAt(offset + 1);
argStart = tok->tokAt(offset + 2);
argEnd = tok->tokAt(offset + 2)->link();
tok = tok->tokAt(offset)->link()->next();
}
else
{
// internal error
continue;
}
}
// pointer to function returning pointer to function
else if (Token::Match(tok->tokAt(offset), "( * ( * %type% ) ("))
{
functionPtrRetFuncPtr = true;
typeName = tok->tokAt(offset + 4);
argStart = tok->tokAt(offset + 6);
argEnd = tok->tokAt(offset + 6)->link();
argFuncRetStart = argEnd->tokAt(2);
argFuncRetEnd = argEnd->tokAt(2)->link();
tok = argFuncRetEnd->next();
}
// function returning pointer to function
else if (Token::Match(tok->tokAt(offset), "( * %type% (") &&
Token::Match(tok->tokAt(offset + 3)->link(), ") ) ("))
{
functionRetFuncPtr = true;
typeName = tok->tokAt(offset + 2);
argStart = tok->tokAt(offset + 3);
argEnd = tok->tokAt(offset + 3)->link();
argFuncRetStart = argEnd->tokAt(2);
argFuncRetEnd = argEnd->tokAt(2)->link();
tok = argFuncRetEnd->next();
}
else if (Token::Match(tok->tokAt(offset), "( * ( %type% ) ("))
{
functionRetFuncPtr = true;
typeName = tok->tokAt(offset + 3);
argStart = tok->tokAt(offset + 5);
argEnd = tok->tokAt(offset + 5)->link();
argFuncRetStart = argEnd->tokAt(2);
argFuncRetEnd = argEnd->tokAt(2)->link();
tok = argFuncRetEnd->next();
}
// pointer/reference to array
else if (Token::Match(tok->tokAt(offset), "( *|& %type% ) ["))
{
ptrToArray = (tok->tokAt(offset + 1)->str() == "*");
refToArray = (tok->tokAt(offset + 1)->str() == "&");
typeName = tok->tokAt(offset + 2);
arrayStart = tok->tokAt(offset + 4);
arrayEnd = arrayStart->link();
tok = arrayEnd->next();
}
// pointer to class member
else if (Token::Match(tok->tokAt(offset), "( %type% :: * %type% ) ;"))
{
namespaceStart = tok->tokAt(offset + 1);
namespaceEnd = tok->tokAt(offset + 2);
ptrMember = true;
typeName = tok->tokAt(offset + 4);
tok = tok->tokAt(offset + 6);
}
// unhandled typedef, skip it and continue
else
{
continue;
}
bool done = false;
bool ok = true;
while (!done)
{
std::string pattern;
int scope = 0;
bool inScope = true;
bool exitThisScope = false;
int exitScope = 0;
bool simplifyType = false;
unsigned int classLevel = spaceInfo.size();
for (unsigned int i = classLevel; i < spaceInfo.size(); i++)
pattern += (spaceInfo[i].className + " :: ");
pattern += typeName->str();
for (Token *tok2 = tok; tok2; tok2 = tok2->next())
{
if (tok2->str() == "}")
{
if (classLevel > 0 && tok2 == spaceInfo[classLevel - 1].classEnd)
{
--classLevel;
pattern.clear();
for (unsigned int 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;
}
}
}
else if (tok2->str() == "{")
{
scope++;
}
else if (Token::Match(tok2, pattern.c_str()))
{
if (pattern != typeName->str()) // has a "something ::"
{
for (unsigned int i = classLevel; i < spaceInfo.size(); i++)
{
tok2->deleteNext();
tok2->deleteNext();
}
simplifyType = true;
}
else if (inScope && !exitThisScope)
{
if (Token::simpleMatch(tok2->previous(), "::"))
{
// Don't replace this typename if it's preceded by "::" unless it's a namespace
if (!spaceInfo.empty() && (tok2->tokAt(-2)->str() == spaceInfo[0].className) && spaceInfo[0].isNamespace)
{
tok2 = tok2->tokAt(-3);
tok2->deleteNext();
tok2->deleteNext();
tok2 = tok2->next();
simplifyType = true;
}
}
else if (duplicateTypedef(&tok2, typeName))
{
exitScope = scope;
// skip to end of scope if not already there
if (tok2->str() != "}")
{
int level = 0;
while (tok2->next() && (tok2->next()->str() != "}" || level))
{
if (tok2->next()->str() == "{")
level++;
else if (tok2->next()->str() == "}")
level--;
tok2 = tok2->next();
}
}
}
else if (tok2->previous()->str() != ".")
{
simplifyType = true;
}
}
}
if (simplifyType)
{
// There are 2 catagories 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 catagory this substitution is
bool isDerived = false;
bool inCast = false;
bool inTemplate = false;
bool inOperator = false;
// check for derived class: class A : some_typedef {
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->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;
// check for operator
if (Token::Match(tok2->previous(), "operator") ||
Token::Match(tok2->tokAt(-2), "operator const"))
inOperator = true;
// skip over class or struct in derived class declaration
if (isDerived && Token::Match(typeStart, "class|struct"))
typeStart = typeStart->next();
// start substituting at the typedef name by replacing it with the type
tok2->str(typeStart->str());
Token * nextToken;
std::stack<Token *> links;
for (nextToken = typeStart->next(); nextToken != typeEnd->next(); nextToken = nextToken->next())
{
tok2->insertToken(nextToken->str());
tok2 = tok2->next();
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[")
links.push(tok2);
if (tok2->str() == ")" || tok2->str() == "]")
{
Token * link = links.top();
tok2->link(link);
link->link(tok2);
links.pop();
}
}
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 (functionPtr || functionRef || function)
{
// don't add parenthesis around function names because it
// confuses other simplifications
bool needParen = true;
if (!inTemplate && function && 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 (const1)
{
tok2->insertToken(const1->str());
tok2 = tok2->next();
if (const2)
{
tok2->insertToken(const2->str());
tok2 = tok2->next();
}
}
if (!inCast)
{
if (tok2->next() && tok2->next()->str() != ")" &&
tok2->next()->str() != ",")
{
if (Token::Match(tok2->next(), "( * %type% ) ("))
tok2 = tok2->tokAt(5)->link();
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 typedef parameter
if (tok2->next()->str() == "(")
{
tok2 = tok2->next()->link();
if (tok2->next()->str() == "(")
tok2 = tok2->next()->link();
}
}
}
}
}
if (needParen)
{
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
}
tok2->insertToken("(");
tok2 = tok2->next();
tok3 = tok2;
Token * nextArgTok;
std::stack<Token *> argLinks;
for (nextArgTok = argStart->next(); nextArgTok != argEnd; nextArgTok = nextArgTok->next())
{
tok2->insertToken(nextArgTok->strAt(0));
tok2 = tok2->next();
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[")
argLinks.push(tok2);
if (tok2->str() == ")" || tok2->str() == "]")
{
Token * link = argLinks.top();
tok2->link(link);
link->link(tok2);
argLinks.pop();
}
}
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
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
tok2 = tok2->next();
if (tok4 && functionPtrRetFuncPtr)
{
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok4);
}
tok2->insertToken("(");
tok2 = tok2->next();
Token *tok5 = tok2;
Token *nextArgTok;
std::stack<Token *> argLinks;
for (nextArgTok = argStart->next(); nextArgTok != argEnd; nextArgTok = nextArgTok->next())
{
tok2->insertToken(nextArgTok->str());
tok2 = tok2->next();
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[")
argLinks.push(tok2);
if (tok2->str() == ")" || tok2->str() == "]")
{
Token * link = argLinks.top();
tok2->link(link);
link->link(tok2);
argLinks.pop();
}
}
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok5);
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok3);
tok2->insertToken("(");
tok2 = tok2->next();
Token *tok6 = tok2;
for (nextArgTok = argFuncRetStart->next(); nextArgTok != argFuncRetEnd; nextArgTok = nextArgTok->next())
{
tok2->insertToken(nextArgTok->str());
tok2 = tok2->next();
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[")
argLinks.push(tok2);
if (tok2->str() == ")" || tok2->str() == "]")
{
Token * link = argLinks.top();
tok2->link(link);
link->link(tok2);
argLinks.pop();
}
}
tok2->insertToken(")");
tok2 = tok2->next();
Token::createMutualLinks(tok2, tok6);
}
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)
{
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);
}
if (arrayStart && arrayEnd)
{
tok2 = tok2->next();
Token * nextArrTok;
std::stack<Token *> arrLinks;
for (nextArrTok = arrayStart; nextArrTok != arrayEnd->next(); nextArrTok = nextArrTok->next())
{
tok2->insertToken(nextArrTok->strAt(0));
tok2 = tok2->next();
// Check for links and fix them up
if (tok2->str() == "(" || tok2->str() == "[")
arrLinks.push(tok2);
if (tok2->str() == ")" || tok2->str() == "]")
{
Token * link = arrLinks.top();
tok2->link(link);
link->link(tok2);
arrLinks.pop();
}
}
tok2 = tok2->next();
}
simplifyType = false;
}
}
if (tok->str() == ";")
done = true;
else if (tok->str() == ",")
{
arrayStart = 0;
arrayEnd = 0;
offset = 1;
pointers.clear();
while (Token::Match(tok->tokAt(offset), "*|&"))
pointers.push_back(tok->tokAt(offset++)->str());
if (Token::Match(tok->tokAt(offset), "%type%"))
{
typeName = tok->tokAt(offset++);
if (tok->tokAt(offset) && tok->tokAt(offset)->str() == "[")
{
arrayStart = tok->tokAt(offset);
bool atEnd = false;
while (!atEnd)
{
while (tok->tokAt(offset + 1) && !Token::Match(tok->tokAt(offset + 1), ";|,"))
offset++;
if (!tok->tokAt(offset + 1))
return; // invalid input
else if (tok->tokAt(offset + 1)->str() == ";")
atEnd = true;
else if (tok->tokAt(offset)->str() == "]")
atEnd = true;
else
offset++;
}
arrayEnd = tok->tokAt(offset++);
}
if (Token::Match(tok->tokAt(offset), ";|,"))
tok = tok->tokAt(offset);
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 but leave ;
while (typeDef->next() && typeDef->next() != tok)
typeDef->deleteNext();
if (typeDef != _tokens)
{
tok = typeDef->previous();
tok->deleteNext();
}
else
{
_tokens->deleteThis();
tok = _tokens;
}
}
}
}
bool Tokenizer::tokenize(std::istream &code, const char FileName[], const std::string &configuration)
{
if (_errorLogger)
_errorLogger->ReportProgress(0, 0);
_configuration = configuration;
// The "_files" vector remembers what files have been tokenized..
_files.push_back(getFileLister()->simplifyPath(FileName));
createTokens(code);
if (!createLinks())
{
// Source has syntax errors, can't proceed
return false;
}
// check for simple syntax errors..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "> struct {") &&
Token::simpleMatch(tok->tokAt(2)->link(), "} ;"))
{
syntaxError(tok);
deallocateTokens();
return false;
}
}
// specify array size..
arraySize();
// simplify labels..
labels();
simplifyDoWhileAddBraces();
simplifyIfAddBraces();
// Combine "- %num%" ..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "[([+-*/=,] - %num%") && tok->strAt(2)[0] != '-')
{
tok->next()->str(std::string("-") + tok->strAt(2));
tok->next()->deleteNext();
}
if (Token::Match(tok, "return|case - %num%") && tok->strAt(2)[0] != '-')
{
tok->next()->str(std::string("-") + tok->strAt(2));
tok->next()->deleteNext();
}
}
// Combine tokens..
for (Token *tok = _tokens; tok && tok->next(); tok = tok->next())
{
static const char * const combineWithNext[][3] =
{
{ "<", "<", "<<" },
{ "|", "|", "||" },
{ "+", "=", "+=" },
{ "-", "=", "-=" },
{ "*", "=", "*=" },
{ "/", "=", "/=" },
{ "&", "=", "&=" },
{ "|", "=", "|=" },
{ "=", "=", "==" },
{ "!", "=", "!=" },
{ "<", "=", "<=" },
{ ">", "=", ">=" },
{ ":", ":", "::" },
{ "-", ">", "." }, // Replace "->" with "."
{ "private", ":", "private:" },
{ "protected", ":", "protected:" },
{ "public", ":", "public:" },
{ "__published", ":", "__published:" }
};
for (unsigned ui = 0; ui < sizeof(combineWithNext) / sizeof(combineWithNext[0]); ui++)
{
if (tok->str() == combineWithNext[ui][0] && tok->next()->str() == combineWithNext[ui][1])
{
tok->str(combineWithNext[ui][2]);
tok->deleteNext();
}
}
}
// Remove __declspec()
simplifyDeclspec();
// remove calling conventions __cdecl, __stdcall..
simplifyCallingConvention();
// remove __attribute__((?))
simplifyAttribute();
// typedef..
simplifyTypedef();
// enum..
simplifyEnum();
// Remove __asm..
simplifyAsm();
// Remove "volatile", "inline", "register", and "restrict"
simplifyKeyword();
// Remove __builtin_expect, likely and unlikely
simplifyBuiltinExpect();
// colapse compound standard types into a single token
// unsigned long long int => long _isUnsigned=true,_isLong=true
simplifyStdType();
// Use "<" comparison instead of ">"
simplifyComparisonOrder();
/**
* @todo simplify "for"
* - move out start-statement "for (a;b;c);" => "{ a; for(;b;c); }"
* - try to change "for" loop to a "while" loop instead
*/
simplifyConst();
// struct simplification "struct S {} s; => struct S { } ; S s ;
simplifyStructDecl();
// struct initialization (must be used before simplifyVarDecl)
simplifyStructInit();
// Split up variable declarations.
simplifyVarDecl();
simplifyVariableMultipleAssign();
// Change initialisation of variable to assignment
simplifyInitVar();
// Remove redundant parantheses
simplifyRedundantParanthesis();
// Handle templates..
simplifyTemplates();
// 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.
simplifyTemplates2();
// Simplify the operator "?:"
simplifyConditionOperator();
// remove exception specifications..
removeExceptionSpecifications(_tokens);
// 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()) { }
//updateClassList();
setVarId();
if (!validate())
return false;
return true;
}
//---------------------------------------------------------------------------
/** Specify array size if it hasn't been given */
void Tokenizer::arraySize()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "%var% [ ] = {"))
{
unsigned int sz = 1;
const Token *tok2 = tok->tokAt(5);
while (Token::Match(tok2, "%any% ,"))
{
sz++;
tok2 = tok2->tokAt(2);
}
if (Token::Match(tok2, "%any% } ;"))
tok->next()->insertToken(MathLib::toString<long>(sz));
}
else if (Token::Match(tok, "%var% [ ] = %str% ;"))
{
unsigned int sz = tok->strAt(4).length() - 1;
tok->next()->insertToken(MathLib::toString<long>(sz));
}
}
}
/** simplify labels in the code.. add an ";" */
void Tokenizer::labels()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, ") const| {"))
{
// Simplify labels in the executable scope..
unsigned int indentlevel = 0;
while (0 != (tok = tok->next()))
{
// indentations..
if (tok->str() == "{")
++indentlevel;
else if (tok->str() == "}")
{
if (indentlevel <= 1)
break;
--indentlevel;
}
// simplify label..
if (Token::Match(tok, "[;{}] %var% : %var%"))
tok->tokAt(2)->insertToken(";");
}
}
}
}
/**
* is the token pointing at a template parameters block
* < int , 3 > => yes
* \param tok start token that must point at "<"
* \return true if the tokens look like template parameters
*/
static bool templateParameters(const Token *tok)
{
if (!tok)
return false;
if (tok->str() != "<")
return false;
tok = tok->next();
while (tok)
{
// num/type ..
if (!tok->isNumber() && !tok->isName())
return false;
tok = tok->next();
// optional "*"
if (tok->str() == "*")
tok = tok->next();
// ,/>
if (tok->str() == ">")
return true;
if (tok->str() != ",")
break;
tok = tok->next();
}
return false;
}
/**
* Remove "template < ..." they can cause false positives because they are not expanded
*/
static void removeTemplates(Token *tok)
{
for (; tok; tok = tok->next())
{
if (! Token::simpleMatch(tok, "template <"))
continue;
for (const Token *tok2 = tok->next(); tok2; tok2 = tok2->next())
{
if (tok2->str() == "{")
{
tok2 = tok2->link();
tok2 = tok2 ? tok2->next() : 0;
Token::eraseTokens(tok, tok2);
tok->str(";");
break;
}
if (tok2->str() == "(")
{
tok2 = tok2->link();
if (!tok2)
break;
}
if (tok2->str() == ";")
{
Token::eraseTokens(tok, tok2->next());
tok->str(";");
break;
}
}
}
}
void Tokenizer::simplifyTemplates()
{
// Remove "typename" unless used in template arguments..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "typename")
tok->deleteThis();
if (Token::simpleMatch(tok, "template <"))
{
while (tok && tok->str() != ">")
tok = tok->next();
if (!tok)
break;
}
}
std::set<std::string> expandedtemplates;
// Locate specialized templates..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() != "template")
continue;
if (!Token::simpleMatch(tok->next(), "< >"))
continue;
// what kind of template is this?
Token *tok2 = tok->tokAt(3);
while (tok2 && (tok2->isName() || tok2->str() == "*"))
tok2 = tok2->next();
if (!templateParameters(tok2))
continue;
// unknown template.. bail out
if (!tok2->previous()->isName())
continue;
tok2 = tok2->previous();
std::string s;
{
std::ostringstream ostr;
const Token *tok3 = tok2;
for (tok3 = tok2; tok3 && tok3->str() != ">"; tok3 = tok3->next())
{
if (tok3 != tok2)
ostr << " ";
ostr << tok3->str();
}
if (!Token::Match(tok3, "> ("))
continue;
s = ostr.str();
}
// save search pattern..
const std::string pattern(s + " > (");
// remove spaces to create new name
while (s.find(" ") != std::string::npos)
s.erase(s.find(" "), 1);
const std::string name(s + ">");
expandedtemplates.insert(name);
// Rename template..
Token::eraseTokens(tok2, Token::findmatch(tok2, "("));
tok2->str(name);
// delete the "template < >"
tok->deleteThis();
tok->deleteThis();
tok->deleteThis();
// Use this special template in the code..
while (0 != (tok2 = const_cast<Token *>(Token::findmatch(tok2, pattern.c_str()))))
{
Token::eraseTokens(tok2, Token::findmatch(tok2, "("));
tok2->str(name);
}
}
// Locate templates..
std::list<Token *> templates;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "template <"))
{
for (const Token *tok2 = tok; tok2; tok2 = tok2->next())
{
// Just a declaration => ignore this
if (tok2->str() == ";")
break;
// Implementation => add to "templates"
if (tok2->str() == "{")
{
templates.push_back(tok);
break;
}
}
}
}
if (templates.empty())
{
removeTemplates(_tokens);
return;
}
// Locate possible instantiations of templates..
std::list<Token *> used;
for (Token *tok = _tokens; tok; tok = tok->next())
{
// template definition.. skip it
if (Token::simpleMatch(tok, "template <"))
{
for (; tok; tok = tok->next())
{
if (tok->str() == "{" || tok->str() == "(")
{
tok = tok->link();
if (!tok)
break;
if (tok->str() == "}")
break;
}
else if (tok->str() == ";")
{
break;
}
}
if (!tok)
break;
}
else if (Token::Match(tok->previous(), "[{};=] %var% <") ||
Token::Match(tok->tokAt(-2), "[,:] private|protected|public %var% <"))
{
if (templateParameters(tok->next()))
used.push_back(tok);
}
}
if (used.empty())
{
removeTemplates(_tokens);
return;
}
// Template arguments with default values
for (std::list<Token *>::iterator iter1 = templates.begin(); iter1 != templates.end(); ++iter1)
{
std::list<Token *> eq;
unsigned int templatepar = 1;
std::string classname;
for (Token *tok = *iter1; tok; tok = tok->next())
{
if (tok->str() == ">")
{
if (Token::Match(tok, "> class|struct %var%"))
classname = tok->strAt(2);
break;
}
if (tok->str() == ",")
++templatepar;
else if (tok->str() == "=")
eq.push_back(tok);
}
if (eq.empty() || classname.empty())
continue;
for (std::list<Token *>::iterator iter2 = used.begin(); iter2 != used.end(); ++iter2)
{
Token *tok = *iter2;
if (!Token::Match(tok, (classname + " < %any%").c_str()))
continue;
// count the parameters..
unsigned int usedpar = 1;
for (tok = tok->tokAt(3); tok; tok = tok->tokAt(2))
{
if (tok->str() == ">")
break;
if (tok->str() == ",")
++usedpar;
else
break;
}
if (tok && tok->str() == ">")
{
tok = tok->previous();
std::list<Token *>::const_iterator it = eq.begin();
for (unsigned int i = (templatepar - eq.size()); it != eq.end() && i < usedpar; ++i)
++it;
while (it != eq.end())
{
tok->insertToken(",");
tok = tok->next();
tok->insertToken((*it)->strAt(1));
tok = tok->next();
++it;
}
}
}
for (std::list<Token *>::iterator it = eq.begin(); it != eq.end(); ++it)
{
(*it)->deleteThis();
(*it)->deleteThis();
}
}
// expand templates
bool done = false;
//while (!done)
{
done = true;
for (std::list<Token *>::iterator iter1 = templates.begin(); iter1 != templates.end(); ++iter1)
{
Token *tok = *iter1;
std::vector<const Token *> type;
for (tok = tok->tokAt(2); tok && tok->str() != ">"; tok = tok->next())
{
if (Token::Match(tok, "%var% ,|>"))
type.push_back(tok);
}
// bail out if the end of the file was reached
if (!tok)
break;
// get the position of the template name
unsigned int namepos = 0;
if (Token::Match(tok, "> class|struct %type% {|:"))
namepos = 2;
else if (Token::Match(tok, "> %type% *|&| %type% ("))
namepos = 2;
else if (Token::Match(tok, "> %type% %type% *|&| %type% ("))
namepos = 3;
else
{
#ifndef NDEBUG
// debug message that we bail out..
if (_settings && _settings->_debug)
{
std::cout << "simplifyTemplates debug-information: bailing out: "
<< file(tok->tokAt(namepos))
<< ": "
<< tok->tokAt(namepos)->linenr()
<< ": "
<< tok->tokAt(namepos)->str()
<< std::endl;
}
#endif
continue;
}
if ((tok->tokAt(namepos)->str() == "*" || tok->tokAt(namepos)->str() == "&"))
++namepos;
// name of template function/class..
const std::string name(tok->strAt(namepos));
const bool isfunc(tok->strAt(namepos + 1) == "(");
// locate template usage..
std::string s(name + " <");
for (unsigned int i = 0; i < type.size(); ++i)
{
if (i > 0)
s += ",";
s += " %any% ";
}
const std::string pattern(s + "> ");
std::string::size_type sz1 = used.size();
unsigned int recursiveCount = 0;
for (std::list<Token *>::iterator iter2 = used.begin(); iter2 != used.end(); ++iter2)
{
// If the size of "used" has changed, simplify calculations
if (sz1 != used.size())
{
sz1 = used.size();
simplifyCalculations();
recursiveCount++;
if (recursiveCount > 100)
{
// bail out..
break;
}
}
Token * const tok2 = *iter2;
if (tok2->str() != name)
continue;
if (Token::Match(tok2->previous(), "[;{}=]") &&
!Token::Match(tok2, (pattern + (isfunc ? "(" : "*| %var%")).c_str()))
continue;
// New type..
std::vector<Token> types2;
s = "";
std::string s1(name + " < ");
for (const Token *tok3 = tok2->tokAt(2); tok3 && tok3->str() != ">"; tok3 = tok3->next())
{
if (!tok3->next())
{
s.clear();
break;
}
s1 += tok3->str();
s1 += " ";
if (tok3->str() != ",")
types2.push_back(*tok3);
// add additional type information
if (tok3->isUnsigned())
s += "unsigned";
else if (tok3->isSigned())
s += "signed";
if (tok3->isLong())
s += "long";
s += tok3->str();
}
s1 += ">";
const std::string type2(s);
if (type2.empty() || type.size() != types2.size())
{
#ifndef NDEBUG
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok2->linenr();
loc.setfile(file(tok2));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::debug,
"Failed to instantiate template. The checking continues anyway.",
"templateInstantiate");
_errorLogger->reportErr(errmsg);
#endif
if (type2.empty())
continue;
break;
}
// New classname/funcname..
const std::string name2(name + "<" + type2 + ">");
if (expandedtemplates.find(name2) == expandedtemplates.end())
{
expandedtemplates.insert(name2);
// Copy template..
int _indentlevel = 0;
int _parlevel = 0;
for (const Token *tok3 = _tokens; tok3; tok3 = tok3->next())
{
if (tok3->str() == "{")
++_indentlevel;
else if (tok3->str() == "}")
--_indentlevel;
else if (tok3->str() == "(")
++_parlevel;
else if (tok3->str() == ")")
--_parlevel;
// Start of template..
if (tok3 == tok)
{
tok3 = tok3->next();
}
// member function implemented outside class definition
else if (_indentlevel == 0 && _parlevel == 0 && Token::Match(tok3, (pattern + " :: ~| %var% (").c_str()))
{
addtoken(name2.c_str(), tok3->linenr(), tok3->fileIndex());
while (tok3->str() != "::")
tok3 = tok3->next();
}
// not part of template.. go on to next token
else
continue;
int indentlevel = 0;
std::stack<Token *> braces; // holds "{" tokens
std::stack<Token *> brackets; // holds "(" tokens
std::stack<Token *> brackets2; // holds "[" tokens
for (; tok3; tok3 = tok3->next())
{
if (tok3->str() == "{")
++indentlevel;
else if (tok3->str() == "}")
{
if (indentlevel <= 1 && brackets.empty() && brackets2.empty())
{
// there is a bug if indentlevel is 0
// the "}" token should only be added if indentlevel is 1 but I add it always intentionally
// if indentlevel ever becomes 0, cppcheck will write:
// ### Error: Invalid number of character {
addtoken("}", tok3->linenr(), tok3->fileIndex());
Token::createMutualLinks(braces.top(), _tokensBack);
braces.pop();
break;
}
--indentlevel;
}
if (tok3->isName())
{
// search for this token in the type vector
unsigned int itype = 0;
while (itype < type.size() && type[itype]->str() != tok3->str())
++itype;
// replace type with given type..
if (itype < type.size())
{
addtoken(&types2[itype], tok3->linenr(), tok3->fileIndex());
continue;
}
}
// replace name..
if (Token::Match(tok3, (name + " !!<").c_str()))
{
addtoken(name2.c_str(), tok3->linenr(), tok3->fileIndex());
continue;
}
// copy
addtoken(tok3, tok3->linenr(), tok3->fileIndex());
if (Token::Match(tok3, "%type% <"))
{
if (!Token::Match(tok3, (name + " <").c_str()))
done = false;
used.push_back(_tokensBack);
}
// link() newly tokens manually
if (tok3->str() == "{")
{
braces.push(_tokensBack);
}
else if (tok3->str() == "}")
{
assert(braces.empty() == false);
Token::createMutualLinks(braces.top(), _tokensBack);
braces.pop();
}
else if (tok3->str() == "(")
{
brackets.push(_tokensBack);
}
else if (tok3->str() == "[")
{
brackets2.push(_tokensBack);
}
else if (tok3->str() == ")")
{
assert(brackets.empty() == false);
Token::createMutualLinks(brackets.top(), _tokensBack);
brackets.pop();
}
else if (tok3->str() == "]")
{
assert(brackets2.empty() == false);
Token::createMutualLinks(brackets2.top(), _tokensBack);
brackets2.pop();
}
}
assert(braces.empty());
assert(brackets.empty());
}
}
// Replace all these template usages..
for (Token *tok4 = tok2; tok4; tok4 = tok4->next())
{
if (Token::simpleMatch(tok4, s1.c_str()))
{
bool match = true;
Token * tok5 = tok4->tokAt(2);
unsigned int count = 0;
while (tok5->str() != ">")
{
if (tok5->str() != ",")
{
if (tok5->isUnsigned() != types2[count].isUnsigned() ||
tok5->isSigned() != types2[count].isSigned() ||
tok5->isLong() != types2[count].isLong())
{
match = false;
break;
}
count++;
}
tok5 = tok5->next();
}
if (match)
{
tok4->str(name2);
while (tok4->next()->str() != ">")
{
used.remove(tok4->next());
tok4->deleteNext();
}
used.remove(tok4->next());
tok4->deleteNext();
}
}
}
}
}
}
removeTemplates(_tokens);
}
//---------------------------------------------------------------------------
void Tokenizer::simplifyTemplates2()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "(")
tok = tok->link();
else if (Token::Match(tok, "; %type% <"))
{
const Token *tok2 = tok->tokAt(3);
std::string type;
while (Token::Match(tok2, "%type% ,") || Token::Match(tok2, "%num% ,"))
{
type += tok2->str() + ",";
tok2 = tok2->tokAt(2);
}
if (Token::Match(tok2, "%type% > (") || Token::Match(tok2, "%num% > ("))
{
type += tok2->str();
tok = tok->next();
tok->str(tok->str() + "<" + type + ">");
Token::eraseTokens(tok, tok2->tokAt(2));
}
}
}
}
//---------------------------------------------------------------------------
std::string Tokenizer::getNameForFunctionParams(const Token *start)
{
if (start->next() == start->link())
return "";
std::string result;
bool findNextComma = false;
for (const Token *tok = start->next(); tok && tok != start->link(); tok = tok->next())
{
if (findNextComma)
{
if (tok->str() == ",")
findNextComma = false;
continue;
}
result.append(tok->str() + ",");
findNextComma = true;
}
return result;
}
void Tokenizer::updateClassList()
{
_classInfoList.clear();
// Locate class
const Token *tok1 = tokens();
// Locate implementation
tok1 = tokens();
std::map<std::string, std::map<std::string, std::map<std::string, const Token*> > > implementations;
while ((tok1 = Token::findmatch(tok1, "%var% :: ~| %var% (")) != 0)
{
if (tok1->tokAt(2)->str() == "~")
implementations[tok1->str()]["~ "+tok1->tokAt(3)->str()][getNameForFunctionParams(tok1->tokAt(4))] = tok1;
else
implementations[tok1->str()][tok1->tokAt(2)->str()][getNameForFunctionParams(tok1->tokAt(3))] = tok1;
//std::cout <<"1."<< tok1->str() << "," << tok1->tokAt(2)->str() << ","<<getNameForFunctionParams(tok1->tokAt(3));
tok1 = tok1->next();
}
tok1 = tokens();
while ((tok1 = Token::findmatch(tok1, "%var% :: operator %any% (")) != 0)
{
implementations[tok1->str()][tok1->tokAt(2)->str()+" "+tok1->tokAt(3)->str()][getNameForFunctionParams(tok1->tokAt(4))] = tok1;
//std::cout <<"3."<< tok1->str() << "," << tok1->tokAt(2)->str()+" "+tok1->tokAt(3)->str() << ","<<getNameForFunctionParams(tok1->tokAt(4));
tok1 = tok1->next();
}
tok1 = tokens();
while ((tok1 = Token::findmatch(tok1, "class|struct %var% [{:]")) != 0)
{
ClassInfo::MemberType memberType = ClassInfo::PRIVATE;
if (tok1->str() == "struct")
memberType = ClassInfo::PUBLIC;
const std::string className = tok1->strAt(1);
tok1 = tok1->next();
int indentlevel = 0;
for (const Token *tok = tok1; tok; tok = tok->next())
{
// Indentation
if (tok->str() == "{")
{
++indentlevel;
continue;
}
else if (tok->str() == "}")
{
--indentlevel;
if (indentlevel <= 0)
break;
continue;
}
// Parse class contents (indentlevel == 1)..
if (indentlevel == 1)
{
if (tok->str() == "private:")
memberType = ClassInfo::PRIVATE;
else if (tok->str() == "protected:")
memberType = ClassInfo::PROTECTED;
else if (tok->str() == "public:")
memberType = ClassInfo::PUBLIC;
else if (Token::Match(tok, "typedef %type% ("))
tok = tok->tokAt(2);
else if (Token::Match(tok, "[:,] %var% ("))
tok = tok->tokAt(2);
else if (Token::Match(tok, "%var% ("))
{
ClassInfo::MemberFunctionInfo func;
if (tok->previous()->str() == "~")
{
// destructor
func._declaration = tok->previous();
func._name = "~ " + tok->str();
}
else
{
// member function
func._declaration = tok;
func._name = tok->str();
}
func._type = memberType;
if (tok->next()->link()->next()->str() == "{")
func._implementation = tok;
else
func._implementation = implementations[className][func._name][getNameForFunctionParams(tok->next())];
//std::cout <<"\n2."<< className << "," << func._name << ","<<getNameForFunctionParams(tok->next())<<"\n";
_classInfoList[className]._memberFunctions.push_back(func);
}
else if (Token::Match(tok, "operator %any% ("))
{
ClassInfo::MemberFunctionInfo func;
func._declaration = tok;
func._name = tok->str() + " " + tok->next()->str();
func._type = memberType;
if (tok->tokAt(2)->link()->next()->str() == "{")
func._implementation = tok;
else
func._implementation = implementations[className][func._name][getNameForFunctionParams(tok->tokAt(2))];
//std::cout <<"\n4."<< className << "," << func._name << ","<<getNameForFunctionParams(tok->tokAt(2))<<"\n";
_classInfoList[className]._memberFunctions.push_back(func);
}
}
}
}
}
void Tokenizer::setVarId()
{
// Clear all variable ids
for (Token *tok = _tokens; tok; tok = tok->next())
tok->varId(0);
// Set variable ids..
unsigned int _varId = 0;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok != _tokens && !Token::Match(tok, "[,;{}(] %type%"))
continue;
if (_errorLogger)
_errorLogger->ReportProgress(__FUNCTION__, tok);
// If pattern is "( %type% *|& %var% )" then check if it's a
// variable declaration or a multiplication / mask
if (Token::Match(tok, "( %type% *|& %var% )") && !tok->next()->isStandardType())
{
if (!Token::Match(tok->previous(), "%type%"))
continue;
if (tok->strAt(-1) == "return")
continue;
if (!Token::Match(tok->tokAt(5), "const|{"))
continue;
}
if (Token::Match(tok, "[,;{}(] %type%"))
tok = tok->next();
if (tok->str() == "new")
continue;
if (tok->str() == "throw")
continue;
if (tok->str() == "unsigned")
tok = tok->next();
if (Token::Match(tok, "class|struct %type% :|{|;"))
continue;
if (Token::Match(tok, "using namespace %type% ;"))
{
tok = tok->next();
continue;
}
if (Token::Match(tok, "else|return|typedef|delete|sizeof"))
continue;
if (Token::Match(tok, "const|static|extern|public:|private:|protected:"))
tok = tok->next();
while (Token::Match(tok, "%var% ::"))
tok = tok->tokAt(2);
// Skip template arguments..
if (Token::Match(tok, "%type% <"))
{
int level = 1;
bool again;
Token *tok2 = tok->tokAt(2);
do // Look for start of templates or template arguments
{
again = false;
while (Token::Match(tok2, "%var% ::"))
tok2 = tok2->tokAt(2);
if (Token::Match(tok2, "%type% <"))
{
level++;
tok2 = tok2->tokAt(2);
again = true;
}
else if (Token::Match(tok2, "%type% ,"))
{
tok2 = tok2->tokAt(2);
again = true;
}
else
{
while (tok2 && (tok2->isName() || tok2->isNumber() || tok2->str() == "*" || tok2->str() == ","))
tok2 = tok2->next();
}
}
while (again);
do // Look for end of templates
{
again = false;
if (level == 1 && Token::Match(tok2, "> %var%"))
tok = tok2;
else if (level > 1 && tok2->str() == ">")
{
level--;
if (level == 0)
tok = tok2;
else
{
tok2 = tok2->tokAt(1);
again = true;
}
}
else if (level == 1 && Token::Match(tok2, "> ::|*|& %var%"))
tok = tok2->next();
else
continue; // Not code that I understand / not a variable declaration
}
while (again);
}
// Determine name of declared variable..
std::string varname;
Token *tok2 = tok->tokAt(1);
while (tok2)
{
if (tok2->isName())
varname = tok2->str();
else if (tok2->str() != "*" && tok2->str() != "&")
break;
tok2 = tok2->next();
}
// End of tokens reached..
if (!tok2)
break;
if (varname == "operator" && Token::Match(tok2, "=|+|-|*|/|[| ]| ("))
continue;
// Is it a function?
if (tok2->str() == "(")
{
// Search for function declaration, e.g. void f();
if (Token::simpleMatch(tok2->next(), ") ;"))
continue;
// Search for function declaration, e.g. void f( int c );
if (Token::Match(tok2->next(), "%num%") ||
Token::Match(tok2->next(), "%bool%") ||
tok2->next()->str()[0] == '"' ||
tok2->next()->str()[0] == '\'' ||
tok2->next()->varId() != 0)
{
// This is not a function
}
else
{
continue;
}
}
// Variable declaration found => Set variable ids
if (Token::Match(tok2, "[,();[=]") && !varname.empty())
{
++_varId;
int indentlevel = 0;
int parlevel = 0;
bool dot = false;
bool funcDeclaration = false;
for (tok2 = tok->next(); tok2; tok2 = tok2->next())
{
if (!dot && tok2->str() == varname && !Token::Match(tok2->previous(), "struct|union"))
tok2->varId(_varId);
else if (tok2->str() == "{")
++indentlevel;
else if (tok2->str() == "}")
{
--indentlevel;
if (indentlevel < 0)
break;
// We have reached the end of a loop: "for( int i;;) { }"
if (funcDeclaration && indentlevel <= 0)
break;
}
else if (tok2->str() == "(")
++parlevel;
else if (tok2->str() == ")")
{
// Is this a function parameter or a variable declared in for example a for loop?
if (parlevel == 0 && indentlevel == 0 && Token::Match(tok2, ") const| {"))
funcDeclaration = true;
else
--parlevel;
}
else if (parlevel < 0 && tok2->str() == ";")
break;
dot = bool(tok2->str() == ".");
}
}
}
// Struct/Class members
for (Token *tok = _tokens; tok; tok = tok->next())
{
// str.clear is a variable
// str.clear() is a member function
if (tok->varId() != 0 &&
Token::Match(tok->next(), ". %var% !!(") &&
tok->tokAt(2)->varId() == 0)
{
++_varId;
const std::string pattern(std::string("%varid% . ") + tok->strAt(2));
for (Token *tok2 = tok; tok2; tok2 = tok2->next())
{
if (Token::Match(tok2, pattern.c_str(), tok->varId()))
tok2->tokAt(2)->varId(_varId);
}
}
}
// Member functions and variables in this source
std::list<Token *> allMemberFunctions;
std::list<Token *> allMemberVars;
{
for (Token *tok2 = _tokens; tok2; tok2 = tok2->next())
{
if (Token::Match(tok2, "%var% :: %var%"))
{
if (Token::simpleMatch(tok2->tokAt(3), "("))
allMemberFunctions.push_back(tok2);
else if (tok2->tokAt(2)->varId() != 0)
allMemberVars.push_back(tok2);
}
}
}
// class members..
for (Token *tok = _tokens; 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;
{
unsigned int indentlevel = 0;
for (const Token *tok2 = tok; tok2; tok2 = tok2->next())
{
// Indentation..
if (tok2->str() == "{")
++indentlevel;
else if (tok2->str() == "}")
{
if (indentlevel <= 1)
break;
--indentlevel;
}
// Found a member variable..
else if (indentlevel == 1 && 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()]);
}
// Member functions for this class..
std::list<Token *> funclist;
{
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 paranthesis..
tok2 = tok2->tokAt(3)->link();
if (!tok2)
break;
// If this is a function implementation.. add it to funclist
if (Token::Match(tok2, ") const|volatile| {"))
funclist.push_back(tok2);
}
}
}
// Update the variable ids..
// Parse each function..
for (std::list<Token *>::iterator func = funclist.begin(); func != funclist.end(); ++func)
{
unsigned int indentlevel = 0;
for (Token *tok2 = *func; tok2; tok2 = tok2->next())
{
if (tok2->str() == "{")
++indentlevel;
else if (tok2->str() == "}")
{
if (indentlevel <= 1)
break;
--indentlevel;
}
else if (indentlevel > 0 &&
tok2->varId() == 0 &&
varlist.find(tok2->str()) != varlist.end())
{
tok2->varId(varlist[tok2->str()]);
}
}
}
}
}
}
bool Tokenizer::createLinks()
{
std::list<const Token*> type;
std::list<Token*> links;
std::list<Token*> links2;
std::list<Token*> links3;
for (Token *token = _tokens; token; token = token->next())
{
if (token->link())
{
token->link(0);
}
if (token->str() == "{")
{
links.push_back(token);
type.push_back(token);
}
else if (token->str() == "}")
{
if (links.empty())
{
// Error, { and } don't match.
syntaxError(token, '{');
return false;
}
if (type.back()->str() != "{")
{
syntaxError(type.back(), type.back()->str()[0]);
return false;
}
type.pop_back();
Token::createMutualLinks(links.back(), token);
links.pop_back();
}
else if (token->str() == "(")
{
links2.push_back(token);
type.push_back(token);
}
else if (token->str() == ")")
{
if (links2.empty())
{
// Error, ( and ) don't match.
syntaxError(token, '(');
return false;
}
if (type.back()->str() != "(")
{
syntaxError(type.back(), type.back()->str()[0]);
return false;
}
type.pop_back();
Token::createMutualLinks(links2.back(), token);
links2.pop_back();
}
else if (token->str() == "[")
{
links3.push_back(token);
type.push_back(token);
}
else if (token->str() == "]")
{
if (links3.empty())
{
// Error, [ and ] don't match.
syntaxError(token, '[');
return false;
}
if (type.back()->str() != "[")
{
syntaxError(type.back(), type.back()->str()[0]);
return false;
}
type.pop_back();
Token::createMutualLinks(links3.back(), token);
links3.pop_back();
}
}
if (!links.empty())
{
// Error, { and } don't match.
syntaxError(links.back(), '{');
return false;
}
if (!links2.empty())
{
// Error, ( and ) don't match.
syntaxError(links2.back(), '(');
return false;
}
if (!links3.empty())
{
// Error, [ and ] don't match.
syntaxError(links3.back(), '[');
return false;
}
return true;
}
void Tokenizer::simplifySizeof()
{
// Fill the map _typeSize..
_typeSize.clear();
_typeSize["char"] = sizeof(char);
_typeSize["short"] = sizeof(short);
_typeSize["int"] = sizeof(int);
_typeSize["long"] = sizeof(long);
_typeSize["float"] = sizeof(float);
_typeSize["double"] = sizeof(double);
_typeSize["size_t"] = sizeof(size_t);
_typeSize["*"] = sizeof(void *);
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "class|struct %var%"))
{
_typeSize[tok->strAt(1)] = 100;
}
}
// Locate variable declarations and calculate the size
std::map<unsigned int, std::string> sizeOfVar;
for (Token *tok = _tokens; 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::toString<long>(size);
}
else if (Token::Match(tok->tokAt(-1), "%type% %var% [ %num% ] [;=]") ||
Token::Match(tok->tokAt(-2), "%type% * %var% [ %num% ] [;=]"))
{
unsigned int size = sizeOfType(tok->tokAt(-1));
if (size == 0)
continue;
sizeOfVar[varId] = MathLib::toString<long>(size * MathLib::toLongNumber(tok->strAt(2)));
}
else if (Token::Match(tok->tokAt(-1), "%type% %var% [ %num% ] [,)]") ||
Token::Match(tok->tokAt(-2), "%type% * %var% [ %num% ] [,)]"))
{
Token tempTok(0);
tempTok.str("*");
sizeOfVar[varId] = MathLib::toString<long>(sizeOfType(&tempTok));
}
else if (Token::Match(tok->tokAt(-1), "%type% %var% [ ] = %str% ;"))
{
unsigned int size = sizeOfType(tok->tokAt(4));
if (size == 0)
continue;
sizeOfVar[varId] = MathLib::toString<long>(size);
}
}
}
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() != "sizeof")
continue;
if (Token::simpleMatch(tok->next(), "sizeof"))
continue;
// sizeof 'x'
if (tok->strAt(1)[0] == '\'')
{
tok->deleteThis();
std::ostringstream sz;
sz << sizeof 'x';
tok->str(sz.str());
continue;
}
// sizeof('x')
if (Token::Match(tok, "sizeof ( %any% )") && tok->strAt(2)[0] == '\'')
{
tok->deleteThis();
tok->deleteThis();
tok->deleteNext();
std::ostringstream sz;
sz << sizeof 'x';
tok->str(sz.str());
continue;
}
// sizeof "text"
if (Token::Match(tok->next(), "%str%"))
{
tok->deleteThis();
std::ostringstream ostr;
ostr << (Token::getStrLength(tok) + 1);
tok->str(ostr.str());
continue;
}
// sizeof ("text")
if (Token::Match(tok->next(), "( %str% )"))
{
tok->deleteThis();
tok->deleteThis();
tok->deleteNext();
std::ostringstream ostr;
ostr << (Token::getStrLength(tok) + 1);
tok->str(ostr.str());
continue;
}
// sizeof * (...) -> sizeof(*...)
if (Token::simpleMatch(tok->next(), "* (") && !Token::simpleMatch(tok->tokAt(2)->link(), ") ."))
{
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 parenthesis around the sizeof
for (Token *tempToken = tok->next(); tempToken; tempToken = tempToken->next())
{
if (Token::Match(tempToken, "%var%"))
{
while (tempToken->next()->str() == "[")
{
tempToken = tempToken->next()->link();
}
if (tempToken->next()->str() == ".")
{
// We are checking a class or struct, search next varname
tempToken = tempToken->tokAt(1);
continue;
}
else if (Token::simpleMatch(tempToken->next(), "- >"))
{
// We are checking a class or struct, search next varname
tempToken = tempToken->tokAt(2);
continue;
}
else if (Token::Match(tempToken->next(), "++|--"))
{
// We have variable++ or variable--, there should be
// nothing after this
tempToken = tempToken->tokAt(2);
}
else if (Token::simpleMatch(tempToken->next(), ") ."))
{
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::Match(tok->next(), "( * )"))
{
tok->str(MathLib::toString<long>(sizeOfType(tok->tokAt(2))));
Token::eraseTokens(tok, tok->tokAt(4));
}
// sizeof( a )
else if (Token::Match(tok->next(), "( %var% )") && tok->tokAt(2)->varId() != 0)
{
if (sizeOfVar.find(tok->tokAt(2)->varId()) != sizeOfVar.end())
{
tok->deleteThis();
tok->deleteThis();
tok->deleteNext();
tok->str(sizeOfVar[tok->varId()]);
}
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::toString<long>(size));
Token::eraseTokens(tok, tok->tokAt(4));
}
}
else if (Token::Match(tok, "sizeof ( * %var% )") || Token::Match(tok, "sizeof ( %var% [ %num% ] )"))
{
// Some default value..
unsigned int sz = 0;
unsigned int varid = tok->tokAt((tok->tokAt(2)->str() == "*") ? 3 : 2)->varId();
if (varid != 0)
{
// Try to locate variable declaration..
const Token *decltok = Token::findmatch(_tokens, "%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));
}
}
if (sz > 0)
{
tok->str(MathLib::toString<long>(sz));
Token::eraseTokens(tok, tok->next()->link()->next());
}
}
}
}
bool Tokenizer::simplifyTokenList()
{
// clear the _functionList so it can't contain dead pointers
_functionList.clear();
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "* const"))
tok->deleteNext();
}
// Replace NULL with 0..
for (Token *tok = _tokens; tok; tok = tok->next())
{
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");
}
}
// simplify references
simplifyReference();
simplifyStd();
simplifyGoto();
// Combine wide strings
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (tok->str() == "L" && tok->next() && tok->next()->str()[0] == '"')
{
// Combine 'L "string"'
tok->str(tok->next()->str());
tok->deleteNext();
}
}
// Combine strings
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str()[0] != '"')
continue;
tok->str(simplifyString(tok->str()));
while (tok->next() && tok->next()->str()[0] == '"')
{
tok->next()->str(simplifyString(tok->next()->str()));
// Two strings after each other, combine them
tok->concatStr(tok->next()->str());
tok->deleteNext();
}
}
// Convert e.g. atol("0") into 0
simplifyMathFunctions();
// Convert + + into + and + - into -
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (tok->next())
{
if (tok->str() == "+")
{
if (tok->next()->str() == "+")
{
tok->deleteNext();
continue;
}
else if (tok->next()->str() == "-")
{
tok->str("-");
tok->deleteNext();
continue;
}
}
else if (tok->str() == "-")
{
if (tok->next()->str() == "-")
{
tok->str("+");
tok->deleteNext();
continue;
}
else if (tok->next()->str() == "+")
{
tok->deleteNext();
continue;
}
}
break;
}
}
// 0[a] -> a[0]
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "%num% [ %var% ]"))
{
const std::string temp = tok->str();
tok->str(tok->tokAt(2)->str());
tok->tokAt(2)->str(temp);
}
}
simplifySizeof();
// replace strlen(str)
simplifyKnownVariables();
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "strlen ( %str% )"))
{
std::ostringstream ostr;
ostr << Token::getStrLength(tok->tokAt(2));
tok->str(ostr.str());
tok->deleteNext();
tok->deleteNext();
tok->deleteNext();
}
}
// change array to pointer..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "%type% %var% [ ] [,;=]"))
{
Token::eraseTokens(tok->next(), tok->tokAt(4));
tok->insertToken("*");
}
}
// Replace constants..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "const %type% %var% = %num% ;"))
{
unsigned int varId = tok->tokAt(2)->varId();
if (varId == 0)
{
tok = tok->tokAt(5);
continue;
}
const std::string num = tok->strAt(4);
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);
}
}
}
}
simplifyCasts();
// simplify "x=realloc(y,0);" => "free(y); x=0;"..
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "; %var% = realloc ( %var% , 0 ) ;"))
{
const std::string varname(tok->next()->str());
const unsigned int varid(tok->next()->varId());
// Delete the "%var% ="
tok->deleteNext();
tok->deleteNext();
// Change function name "realloc" to "free"
tok->next()->str("free");
// delete the ", 0"
Token::eraseTokens(tok->tokAt(3), tok->tokAt(6));
// goto the ";"
tok = tok->tokAt(5);
// insert "var=0;"
tok->insertToken(";");
tok->insertToken("0");
tok->insertToken("=");
tok->insertToken(varname);
tok->next()->varId(varid);
}
}
// Simplify simple calculations..
while (simplifyCalculations())
;
// Replace "*(str + num)" => "str[num]"
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (! strchr(";{}(=<>", tok->str()[0]))
continue;
Token *next = tok->next();
if (! next)
break;
if (Token::Match(next, "* ( %var% + %num% )") ||
Token::Match(next, "* ( %var% + %var% )"))
{
// var
tok = tok->next();
tok->str(tok->strAt(2));
// [
tok = tok->next();
tok->str("[");
// num
tok = tok->next();
tok->str(tok->strAt(2));
// ]
tok = tok->next();
tok->str("]");
tok->deleteNext();
tok->deleteNext();
Token::createMutualLinks(next->tokAt(1), next->tokAt(3));
}
}
// Change initialisation of variable to assignment
simplifyInitVar();
// Simplify variable declarations
simplifyVarDecl();
simplifyFunctionParameters();
elseif();
simplifyErrNoInWhile();
simplifyIfAssign();
simplifyRedundantParanthesis();
simplifyIfNot();
simplifyIfNotNull();
simplifyIfSameInnerCondition();
simplifyComparisonOrder();
simplifyNestedStrcat();
simplifyWhile0();
simplifyFuncInWhile();
simplifyIfAssign(); // could be affected by simplifyIfNot
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "case %any% : %var%"))
tok->tokAt(2)->insertToken(";");
if (Token::Match(tok, "default : %var%"))
tok->next()->insertToken(";");
}
// In case variable declarations have been updated...
setVarId();
bool modified = true;
while (modified)
{
modified = false;
modified |= simplifyConditions();
modified |= simplifyFunctionReturn();
modified |= simplifyKnownVariables();
modified |= removeReduntantConditions();
modified |= simplifyRedundantParanthesis();
modified |= simplifyQuestionMark();
modified |= simplifyCalculations();
}
// Remove redundant parantheses in return..
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (Token::simpleMatch(tok, "return ("))
{
Token *tok2 = tok->next()->link();
if (Token::simpleMatch(tok2, ") ;"))
{
tok->deleteNext();
tok2->deleteThis();
}
else
{
break;
}
}
}
removeRedundantAssignment();
simplifyComma();
if (_settings && _settings->_debug)
{
_tokens->printOut(0, _files);
}
return validate();
}
//---------------------------------------------------------------------------
void Tokenizer::removeRedundantAssignment()
{
for (Token *tok = _tokens; 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())
{
if (Token::Match(tok2, "[;{}] %type% * %var% ;"))
{
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% = %var% ;") &&
!Token::Match(tok2->previous(), "[;{}] %var% = %num% ;"))
{
localvars.erase(tok2->varId());
}
}
localvars.erase(0);
if (!localvars.empty())
{
for (Token *tok2 = tok->next(); tok2 && tok2 != end; tok2 = tok2->next())
{
if (Token::Match(tok2, "[;{}] %type% %var% ;") && localvars.find(tok2->tokAt(2)->varId()) != localvars.end())
{
Token::eraseTokens(tok2, tok2->tokAt(3));
}
else if (Token::Match(tok2, "[;{}] %type% * %var% ;") && localvars.find(tok2->tokAt(3)->varId()) != localvars.end())
{
Token::eraseTokens(tok2, tok2->tokAt(4));
}
else if (Token::Match(tok2, "[;{}] %var% = %any% ;") && localvars.find(tok2->next()->varId()) != localvars.end())
{
Token::eraseTokens(tok2, tok2->tokAt(4));
}
}
}
}
}
}
bool Tokenizer::removeReduntantConditions()
{
bool ret = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() != "if")
continue;
if (!Token::Match(tok->tokAt(1), "( %bool% ) {"))
continue;
// Find matching else
const Token *elseTag = 0;
// Find the closing "}"
elseTag = tok->tokAt(4)->link()->next();
bool boolValue = false;
if (tok->tokAt(2)->str() == "true")
boolValue = true;
// Handle if with else
if (elseTag && elseTag->str() == "else")
{
if (Token::simpleMatch(elseTag->next(), "if ("))
{
// Handle "else if"
if (boolValue == false)
{
// Convert "if( false ) {aaa;} else if() {bbb;}" => "if() {bbb;}"
Token::eraseTokens(tok, elseTag->tokAt(2));
ret = true;
}
else
{
// Keep first if, remove every else if and else after it
const Token *lastTagInIf = elseTag->tokAt(2);
while (lastTagInIf)
{
if (lastTagInIf->str() == "(")
{
lastTagInIf = lastTagInIf->link()->next();
}
lastTagInIf = lastTagInIf->link()->next();
if (!Token::simpleMatch(lastTagInIf, "else"))
break;
lastTagInIf = lastTagInIf->next();
if (lastTagInIf->str() == "if")
lastTagInIf = lastTagInIf->next();
}
Token::eraseTokens(elseTag->previous(), lastTagInIf);
ret = true;
}
}
else
{
// Handle else
if (boolValue == false)
{
// Convert "if( false ) {aaa;} else {bbb;}" => "{bbb;}" or ";{bbb;}"
if (tok->previous())
tok = tok->previous();
else
tok->str(";");
Token::eraseTokens(tok, elseTag->tokAt(1));
}
else
{
if (elseTag->tokAt(1)->str() == "{")
{
// Convert "if( true ) {aaa;} else {bbb;}" => "{aaa;}"
const Token *end = elseTag->tokAt(1)->link();
// Remove the "else { aaa; }"
Token::eraseTokens(elseTag->previous(), end->tokAt(1));
}
// Remove "if( true )"
if (tok->previous())
tok = tok->previous();
else
tok->str(";");
Token::eraseTokens(tok, tok->tokAt(5));
}
ret = true;
}
}
// Handle if without else
else
{
if (boolValue == false)
{
// Remove if and its content
if (tok->previous())
tok = tok->previous();
else
tok->str(";");
Token::eraseTokens(tok, elseTag);
}
else
{
// convert "if( true ) {aaa;}" => "{aaa;}"
if (tok->previous())
tok = tok->previous();
else
tok->str(";");
Token::eraseTokens(tok, tok->tokAt(5));
}
ret = true;
}
}
return ret;
}
void Tokenizer::simplifyIfAddBraces()
{
for (Token *tok = _tokens; tok; tok = tok ? tok->next() : NULL)
{
if (tok->str() == "(")
{
tok = tok->link();
continue;
}
if (tok->previous() && !Token::Match(tok->previous(), ";|{|}|else|)|:"))
continue;
if (Token::Match(tok, "if|for|while ("))
{
// don't add "{}" around ";" in "do {} while();" (#609)
const Token *prev = tok->previous();
if (Token::simpleMatch(prev, "} while") &&
prev->link() &&
prev->link()->previous() &&
prev->link()->previous()->str() == "do")
{
continue;
}
// Goto the ending ')'
tok = tok->next()->link();
// ')' should be followed by '{'
if (!tok || Token::simpleMatch(tok, ") {"))
continue;
}
else if (tok->str() == "else")
{
// An else followed by an if or brace don't need to be processed further
if (Token::Match(tok, "else if|{"))
continue;
}
else
{
continue;
}
// If there is no code after he if(), abort
if (!tok->next())
return;
// insert open brace..
tok->insertToken("{");
tok = tok->next();
Token *tempToken = tok;
bool innerIf = Token::simpleMatch(tempToken->next(), "if");
if (Token::simpleMatch(tempToken->next(), "do {"))
tempToken = tempToken->tokAt(2)->link();
// insert close brace..
// In most cases it would work to just search for the next ';' and insert a closing brace after it.
// But here are special cases..
// * if (cond) for (;;) break;
// * if (cond1) if (cond2) { }
// * if (cond1) if (cond2) ; else ;
while ((tempToken = tempToken->next()) != NULL)
{
if (tempToken->str() == "{")
{
if (Token::simpleMatch(tempToken->previous(),"else {"))
{
if (innerIf)
tempToken = tempToken->link();
else
tempToken = tempToken->tokAt(-2);
break;
}
tempToken = tempToken->link();
if (tempToken->next()->isName() && tempToken->next()->str() != "else")
break;
continue;
}
if (tempToken->str() == "(")
{
tempToken = tempToken->link();
continue;
}
if (tempToken->str() == "}")
{
// insert closing brace before this token
tempToken = tempToken->previous();
break;
}
if (tempToken->str() == ";")
{
if (!innerIf)
break;
if (Token::Match(tempToken, "; else if"))
;
else if (Token::Match(tempToken, "; else"))
innerIf = false;
else
break;
}
}
if (tempToken)
{
tempToken->insertToken("}");
Token::createMutualLinks(tok, tempToken->next());
}
}
}
bool Tokenizer::simplifyDoWhileAddBracesHelper(Token *tok)
{
if (Token::Match(tok->next(), "[),]"))
{
// fix for #988
return false;
}
Token *tok1 = tok; // token with "do"
Token *tok2 = NULL; // token with "while"
Token *tok3 = tok->next();
// skip loop body
bool result = false;
while (tok3)
{
if (tok3->str() == "{")
{
tok3 = tok3->link();
}
else if (tok3->str() == "while")
{
tok2 = tok3;
break;
}
else if (Token::Match(tok3, "do {"))
{
// Skip do{}while inside the current "do"
tok3 = tok3->next()->link();
if (Token::simpleMatch(tok3->next(), "while"))
tok3 = tok3->next();
}
else if (Token::Match(tok3, "do !!{") &&
!Token::Match(tok3->next(), "[),]"))
{
// Handle do-while inside the current "do"
// first and return true to get the outer
// "do" to be handled later.
tok1 = tok3;
result = true;
}
tok3 = tok3->next();
}
if (tok2)
{
// insert "{" after "do"
tok1->insertToken("{");
// insert "}" before "while"
tok2->previous()->insertToken("}");
Token::createMutualLinks(tok1->next(), tok2->previous());
}
else
result = false;
return result;
}
void Tokenizer::simplifyDoWhileAddBraces()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "do !!{"))
{
while (simplifyDoWhileAddBracesHelper(tok))
{
// Call until the function returns false to
// handle do-while inside do-while
}
}
}
}
void Tokenizer::simplifyConditionOperator()
{
int parlevel = 0;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "(")
++parlevel;
else if (tok->str() == ")")
--parlevel;
else if (parlevel == 0 && Token::Match(tok, "; %var% = %var% ? %var% : %var% ;"))
{
const std::string var(tok->strAt(1));
const std::string condition(tok->strAt(3));
const std::string value1(tok->strAt(5));
const std::string value2(tok->strAt(7));
Token::eraseTokens(tok, tok->tokAt(9));
std::string str("if ( " + condition + " ) { " + var + " = " + value1 + " ; } else { " + var + " = " + value2 + " ; }");
std::string::size_type pos1 = 0;
while (pos1 != std::string::npos)
{
std::string::size_type pos2 = str.find(" ", pos1);
if (pos2 == std::string::npos)
{
tok->insertToken(str.substr(pos1).c_str());
pos1 = pos2;
}
else
{
tok->insertToken(str.substr(pos1, pos2 - pos1).c_str());
pos1 = pos2 + 1;
}
tok = tok->next();
}
Token::createMutualLinks(tok->tokAt(-15), tok->tokAt(-13));
Token::createMutualLinks(tok->tokAt(-12), tok->tokAt(-7));
Token::createMutualLinks(tok->tokAt(-5), tok);
}
}
}
bool Tokenizer::simplifyConditions()
{
bool ret = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "! %num%") || Token::Match(tok, "! %bool%"))
{
if (tok->next()->str() == "0" || tok->next()->str() == "false")
tok->str("true");
else
tok->str("false");
tok->deleteNext();
ret = true;
}
if (Token::simpleMatch(tok, "( true &&") ||
Token::simpleMatch(tok, "&& true &&") ||
Token::simpleMatch(tok->next(), "&& true )"))
{
Token::eraseTokens(tok, tok->tokAt(3));
ret = true;
}
else if (Token::simpleMatch(tok, "( false ||") ||
Token::simpleMatch(tok, "|| false ||") ||
Token::simpleMatch(tok->next(), "|| false )"))
{
Token::eraseTokens(tok, tok->tokAt(3));
ret = true;
}
// Change numeric constant in condition to "true" or "false"
if (Token::Match(tok, "if|while ( %num%") &&
(tok->tokAt(3)->str() == ")" || tok->tokAt(3)->str() == "||" || tok->tokAt(3)->str() == "&&"))
{
tok->tokAt(2)->str((tok->tokAt(2)->str() != "0") ? "true" : "false");
ret = true;
}
Token *tok2 = tok->tokAt(2);
if (tok2 &&
(tok->str() == "&&" || tok->str() == "||") &&
Token::Match(tok->next(), "%num%") &&
(tok2->str() == ")" || tok2->str() == "&&" || tok2->str() == "||"))
{
tok->next()->str((tok->next()->str() != "0") ? "true" : "false");
ret = true;
}
// Reduce "(%num% == %num%)" => "(true)"/"(false)"
const Token *tok4 = tok->tokAt(4);
if (! tok4)
break;
if ((tok->str() == "&&" || tok->str() == "||" || tok->str() == "(") &&
(Token::Match(tok->tokAt(1), "%num% %any% %num%") ||
Token::Match(tok->tokAt(1), "%bool% %any% %bool%")) &&
(tok4->str() == "&&" || tok4->str() == "||" || tok4->str() == ")" || tok4->str() == "?"))
{
std::string cmp = tok->strAt(2);
bool result = false;
if (Token::Match(tok->tokAt(1), "%num%"))
{
// Compare numbers
if (cmp == "==" || cmp == "!=")
{
const std::string op1(tok->strAt(1));
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->strAt(1));
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->strAt(1) == 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();
tok->deleteNext();
tok->str(result ? "true" : "false");
ret = true;
}
}
}
return ret;
}
bool Tokenizer::simplifyQuestionMark()
{
bool ret = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() != "?")
continue;
if (!tok->tokAt(-2))
continue;
if (!Token::Match(tok->tokAt(-2), "[=,(]"))
continue;
if (!Token::Match(tok->previous(), "%bool%") &&
!Token::Match(tok->previous(), "%num%"))
continue;
// Find the ":" token..
Token *semicolon = 0;
{
unsigned int parlevel = 0;
for (Token *tok2 = tok; tok2; tok2 = tok2->next())
{
if (tok2->str() == "(")
++parlevel;
else if (tok2->str() == ")")
{
if (parlevel == 0)
break;
--parlevel;
}
else if (parlevel == 0 && tok2->str() == ":")
{
semicolon = tok2;
break;
}
}
}
if (!semicolon || !semicolon->next())
continue;
if (tok->previous()->str() == "false" ||
tok->previous()->str() == "0")
{
// Use code after semicolon, remove code before it.
semicolon = semicolon->next();
tok = tok->tokAt(-2);
Token::eraseTokens(tok, semicolon);
tok = tok->next();
ret = true;
}
// The condition is true. Delete the operator after the ":"..
else
{
const Token *end = 0;
// check the operator after the :
if (Token::simpleMatch(semicolon, ": ("))
{
end = semicolon->next()->link();
if (!Token::Match(end, ") !!."))
continue;
}
// delete the condition token and the "?"
tok = tok->tokAt(-2);
Token::eraseTokens(tok, tok->tokAt(3));
// delete operator after the :
if (end)
{
Token::eraseTokens(semicolon->previous(), end->next());
continue;
}
int ind = 0;
for (const Token *endTok = semicolon; endTok; endTok = endTok->next())
{
if (endTok->str() == ";")
{
Token::eraseTokens(semicolon->previous(), endTok);
ret = true;
break;
}
else if (Token::Match(endTok, "[({[]"))
{
++ind;
}
else if (Token::Match(endTok, "[)}]]"))
{
--ind;
if (ind < 0)
{
Token::eraseTokens(semicolon->previous(), endTok);
ret = true;
break;
}
}
}
}
}
return ret;
}
void Tokenizer::simplifyCasts()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (Token::Match(tok->next(), "( %type% *| ) *|&| %var%") ||
Token::Match(tok->next(), "( %type% %type% *| ) *|&| %var%"))
{
if (tok->isName() && tok->str() != "return")
break;
if (Token::simpleMatch(tok->previous(), "operator"))
break;
// Remove cast..
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. "(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->next();
unsigned int level = 0;
while (tok2)
{
if (tok2->str() == "<")
++level;
else if (tok2->str() == ">")
{
--level;
if (level == 0)
break;
}
tok2 = tok2->next();
}
if (Token::simpleMatch(tok2, "> ("))
{
Token *closeBracket = tok2->next()->link();
if (closeBracket)
{
Token::eraseTokens(tok, tok2->tokAt(2));
closeBracket->deleteThis();
}
else
{
break;
}
}
else
{
break;
}
}
}
}
void Tokenizer::simplifyFunctionParameters()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "{" || tok->str() == "[" || tok->str() == "(")
{
tok = tok->link();
if (!tok)
break;
continue;
}
// Find the function e.g. foo( x ) or foo( x, y )
if (Token::Match(tok, "%var% ( %var% [,)]"))
{
// We have found old style function, now we need to change it
// backup pointer to the '(' token
Token * const tok1 = tok->next();
// Get list of argument names
std::map<std::string, Token*> argumentNames;
bool bailOut = false;
for (tok = tok->tokAt(2); tok; tok = tok->tokAt(2))
{
if (!Token::Match(tok, "%var% [,)]"))
{
bailOut = true;
break;
}
if (argumentNames.find(tok->str()) != argumentNames.end())
{
// Invalid code, two arguments with the same name.
// TODO, print error perhaps?
bailOut = true;
break;
}
argumentNames[tok->str()] = tok;
if (tok->next()->str() == ")")
{
tok = tok->tokAt(2);
break;
}
}
if (bailOut)
{
tok = tok1->link();
if (!tok)
return;
continue;
}
Token *start = tok;
while (tok && tok->str() != "{")
{
if (tok->str() == ";")
{
tok = tok->previous();
// Move tokens from start to tok into the place of
// argumentNames[tok->str()] and remove the ";"
if (argumentNames.find(tok->str()) == argumentNames.end())
{
bailOut = true;
break;
}
// Remove the following ";"
Token *temp = tok->tokAt(2);
tok->deleteNext();
// Replace "x" with "int x" or similar
Token::replace(argumentNames[tok->str()], start, tok);
argumentNames.erase(tok->str());
tok = temp;
start = tok;
}
else
{
tok = tok->next();
}
}
if (Token::simpleMatch(tok, "{"))
tok = tok->link();
if (tok == NULL)
{
break;
}
if (bailOut)
{
continue;
}
}
}
}
void Tokenizer:: simplifyFunctionPointers()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->previous() && !Token::Match(tok->previous(), "[{};]"))
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 with ;
if (!Token::simpleMatch(tok->tokAt(5)->link(), ") ;"))
continue;
// ok simplify this function pointer to an ordinary pointer
tok->deleteNext();
tok->tokAt(2)->deleteNext();
const Token *tok2 = tok->tokAt(3)->link();
Token::eraseTokens(tok->tokAt(2), tok2 ? tok2->next() : 0);
}
}
bool Tokenizer::simplifyFunctionReturn()
{
bool ret = false;
int indentlevel = 0;
for (const Token *tok = tokens(); tok; tok = tok->next())
{
if (tok->str() == "{")
++indentlevel;
else if (tok->str() == "}")
--indentlevel;
else if (indentlevel == 0 && Token::Match(tok, "%var% ( ) { return %num% ; }"))
{
std::ostringstream pattern;
pattern << "[(=+-*/] " << tok->str() << " ( ) [;)+-*/]";
for (Token *tok2 = _tokens; tok2; tok2 = tok2->next())
{
if (Token::Match(tok2, pattern.str().c_str()))
{
tok2 = tok2->next();
tok2->str(tok->strAt(5));
tok2->deleteNext();
tok2->deleteNext();
ret = true;
}
}
}
}
return ret;
}
static void incdec(std::string &value, const std::string &op)
{
int ivalue = 0;
std::istringstream istr(value.c_str());
istr >> ivalue;
if (op == "++")
++ivalue;
else if (op == "--")
--ivalue;
std::ostringstream ostr;
ostr << ivalue;
value = ostr.str();
}
void Tokenizer::simplifyVarDecl()
{
// Split up variable declarations..
// "int a=4;" => "int a; a=4;"
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "= {"))
{
tok = tok->next()->link();
if (!tok)
break;
}
if (tok->previous() && !Token::Match(tok->previous(), "[{};)]"))
continue;
Token *type0 = tok;
if (!Token::Match(type0, "%type%"))
continue;
if (Token::Match(type0, "else|return"))
continue;
bool isconst = false;
bool isstatic = false;
Token *tok2 = type0;
unsigned int typelen = 1;
while (Token::Match(tok2, "%type% %type% *| *| %var%"))
{
if (tok2->str() == "const")
isconst = true;
else if (tok2->str() == "static")
isstatic = true;
tok2 = tok2->next();
++typelen;
}
// Don't split up const declaration..
if (isconst && Token::Match(tok2, "%type% %var% ="))
continue;
// strange looking variable declaration => don't split up.
if (Token::Match(tok2, "%type% *| %var% , %type% *| %var%"))
continue;
if (Token::Match(tok2, "%type% *| %var% ,|="))
{
const bool isPointer = (tok2->next()->str() == "*");
const Token *varName = tok2->tokAt((isPointer ? 2 : 1));
Token *endDeclaration = varName->next();
if (varName->str() != "operator")
{
tok2 = endDeclaration; // The ',' or '=' token
if (isstatic && tok2->str() == "=")
{
if (Token::Match(tok2->next(), "%num% ,"))
tok2 = tok2->tokAt(2);
else
tok2 = NULL;
}
}
else
tok2 = NULL;
}
else if (Token::Match(tok2, "%type% * * %var% ,|="))
{
if (tok2->tokAt(3)->str() != "operator")
tok2 = tok2->tokAt(4); // The ',' token
else
tok2 = NULL;
}
else if (Token::Match(tok2, "%type% * const %var% ,|="))
{
if (tok2->tokAt(3)->str() != "operator")
{
tok2 = tok2->tokAt(4); // The ',' token
}
else
{
tok2 = NULL;
}
}
else if (Token::Match(tok2, "%type% %var% [ %num% ] ,|=|[") ||
Token::Match(tok2, "%type% %var% [ %var% ] ,|=|["))
{
tok2 = tok2->tokAt(5); // The ',' token
while (Token::Match(tok2, "[ %num% ]") || Token::Match(tok2, "[ %var% ]"))
tok2 = tok2->tokAt(3);
if (!Token::Match(tok2, "=|,"))
{
tok2 = NULL;
}
if (tok2 && tok2->str() == "=")
{
while (tok2 && tok2->str() != ",")
{
if (tok2->str() == "{")
tok2 = tok2->link();
tok2 = tok2->next();
if (tok2->str() == ";")
tok2 = NULL;
}
}
}
else if (Token::Match(tok2, "%type% * %var% [ %num% ] ,") ||
Token::Match(tok2, "%type% * %var% [ %var% ] ,"))
{
tok2 = tok2->tokAt(6); // The ',' token
}
else if (Token::Match(tok2, "std :: %type% <") || Token::Match(tok2, "%type% <"))
{
//
// Deal with templates and standart types
//
if (Token::simpleMatch(tok2, "std ::"))
{
typelen += 2;
tok2 = tok2->tokAt(2);
}
typelen += 2;
tok2 = tok2->tokAt(2);
size_t indentlevel = 1;
for (Token *tok3 = tok2; tok3; tok3 = tok3->next())
{
++typelen;
if (tok3->str() == "<")
{
++indentlevel;
}
else if (tok3->str() == ">")
{
--indentlevel;
if (indentlevel == 0)
{
tok2 = tok3->next();
break;
}
}
else if (tok3->str() == ";")
{
break;
}
}
if (Token::Match(tok2, ":: %type%"))
{
typelen += 2;
tok2 = tok2->tokAt(2);
}
if (tok2->str() == "*" || tok2->str() == "&")
{
tok2 = tok2->next();
}
if (Token::Match(tok2, "%var% ,"))
{
tok2 = tok2->next(); // The ',' token
typelen--;
}
else
{
tok2 = NULL;
typelen = 0;
}
}
else
{
tok2 = NULL;
typelen = 0;
}
if (tok2)
{
if (tok2->str() == ",")
{
tok2->str(";");
insertTokens(tok2, type0, typelen);
std::stack<Token *> link1;
std::stack<Token *> link2;
while (((typelen--) > 0) && (0 != (tok2 = tok2->next())))
{
if (tok2->str() == "(")
link1.push(tok2);
else if (tok2->str() == ")" && !link1.empty())
{
Token::createMutualLinks(tok2, link1.top());
link1.pop();
}
else if (tok2->str() == "[")
link2.push(tok2);
else if (tok2->str() == "]" && !link2.empty())
{
Token::createMutualLinks(tok2, link2.top());
link2.pop();
}
}
}
else
{
Token *eq = tok2;
int parlevel = 0;
while (tok2)
{
if (Token::Match(tok2, "[{(<]"))
{
++parlevel;
}
else if (Token::Match(tok2, "[})>]"))
{
if (parlevel <= 0)
break;
--parlevel;
}
else if (parlevel == 0 && strchr(";,", tok2->str()[0]))
{
// "type var =" => "type var; var ="
Token *VarTok = type0->tokAt(typelen);
while (Token::Match(VarTok, "*|const"))
VarTok = VarTok->next();
insertTokens(eq, VarTok, 2);
eq->str(";");
// "= x, " => "= x; type "
if (tok2->str() == ",")
{
tok2->str(";");
insertTokens(tok2, type0, typelen);
}
break;
}
tok2 = tok2->next();
}
}
}
}
}
void Tokenizer::simplifyStdType()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
// long unsigned => unsigned long
if (Token::Match(tok, "long|short|int|char|_int64 unsigned|signed"))
{
std::string temp = tok->str();
tok->str(tok->next()->str());
tok->next()->str(temp);
}
if (!Token::Match(tok, "unsigned|signed|long|char|short|int|__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 (!tok->next()->isIntegerType())
tok->str("int");
else
tok->deleteThis();
tok->isUnsigned(isUnsigned);
tok->isSigned(!isUnsigned);
}
if (Token::Match(tok, "__int64"))
{
tok->str("long");
tok->isLong(true);
}
else if (Token::Match(tok, "long"))
{
if (Token::Match(tok->next(), "long"))
{
tok->isLong(true);
tok->deleteNext();
}
if (Token::Match(tok->next(), "int"))
tok->deleteNext();
else if (Token::Match(tok->next(), "double"))
{
tok->str("double");
tok->isLong(true);
tok->deleteNext();
}
}
else if (Token::Match(tok, "short"))
{
if (Token::Match(tok->next(), "int"))
tok->deleteNext();
}
}
}
void Tokenizer::simplifyIfAssign()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (!Token::Match(tok->next(), "if|while ( !| (| %var% =") &&
!Token::Match(tok->next(), "if|while ( !| (| %var% . %var% ="))
continue;
// simplifying a "while" condition ?
const bool iswhile(tok->next()->str() == "while");
// delete the "if"
tok->deleteNext();
// Remember if there is a "!" or not. And delete it if there are.
const bool isNot(tok->tokAt(2)->str() == "!");
if (isNot)
tok->next()->deleteNext();
// Delete paranthesis.. and remember how many there are with
// their links.
std::list<Token *> braces;
while (tok->next()->str() == "(")
{
braces.push_back(tok->next()->link());
tok->deleteNext();
}
// Skip the "%var% = ..."
Token *tok2;
unsigned int indentlevel = 0;
for (tok2 = tok->next(); tok2; tok2 = tok2->next())
{
if (tok2->str() == "(")
++indentlevel;
else if (tok2->str() == ")")
{
if (indentlevel <= 0)
break;
--indentlevel;
}
}
// Insert "; if|while ( .."
tok2 = tok2->previous();
if (Token::simpleMatch(tok->tokAt(2), "."))
{
tok2->insertToken(tok->strAt(3));
tok2->insertToken(tok->strAt(2));
}
tok2->insertToken(tok->strAt(1));
tok2->next()->varId(tok->tokAt(1)->varId());
while (! braces.empty())
{
tok2->insertToken("(");
Token::createMutualLinks(tok2->next(), braces.back());
braces.pop_back();
}
if (isNot)
tok2->next()->insertToken("!");
tok2->insertToken(iswhile ? "while" : "if");
tok2->insertToken(";");
// If it's a while loop.. insert the assignment in the loop
if (iswhile)
{
indentlevel = 0;
Token *tok3 = tok2;
for (tok3 = tok2; 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::list<Token *> braces2;
for (tok2 = tok2->next(); tok2 && tok2 != tok; tok2 = tok2->previous())
{
tok3->insertToken(tok2->strAt(0));
Token *newTok = tok3->next();
newTok->fileIndex(tok2->fileIndex());
newTok->linenr(tok2->linenr());
// link() newly tokens manually
if (newTok->str() == ")")
{
braces.push_back(newTok);
}
else if (newTok->str() == "]")
{
braces2.push_back(newTok);
}
else if (newTok->str() == "(")
{
Token::createMutualLinks(newTok, braces.back());
braces.pop_back();
}
else if (newTok->str() == "[")
{
Token::createMutualLinks(newTok, braces2.back());
braces2.pop_back();
}
}
}
}
}
}
void Tokenizer::simplifyVariableMultipleAssign()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "%var% = %var% = %num% ;") ||
Token::Match(tok, "%var% = %var% = %var% ;"))
{
// skip intermediate assignments
Token *tok2 = tok->previous();
while (tok2 &&
tok2->str() == "=" &&
Token::Match(tok2->previous(), "%var%"))
{
tok2 = tok2->tokAt(-2);
}
if (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 = _tokens; tok; tok = tok->next())
{
if (tok->str() == "(" || tok->str() == "||" || tok->str() == "&&")
{
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();
tok->next()->str(tok->str());
tok->str("!");
}
else if (Token::Match(tok, "%var% .|:: %var% == 0|false"))
{
tok = tok->previous();
tok->insertToken("!");
tok = tok->tokAt(4);
Token::eraseTokens(tok, tok->tokAt(3));
}
else if (Token::Match(tok, "* %var% == 0|false"))
{
tok = tok->previous();
tok->insertToken("!");
tok = tok->tokAt(3);
Token::eraseTokens(tok, tok->tokAt(3));
}
}
else if (tok->link() && Token::Match(tok, ") == 0|false"))
{
Token::eraseTokens(tok, tok->tokAt(3));
if (Token::Match(tok->link()->previous(), "%var%"))
{
// if( foo(x) == 0 )
tok->link()->previous()->insertToken(tok->link()->previous()->str().c_str());
tok->link()->previous()->previous()->str("!");
}
else
{
// if( (x) == 0 )
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 = _tokens; tok; tok = tok->next())
{
Token *deleteFrom = NULL;
if (tok->str() == "(" || tok->str() == "||" || tok->str() == "&&")
{
tok = tok->next();
if (Token::simpleMatch(tok, "0 != (") ||
Token::Match(tok, "0 != %var%"))
{
deleteFrom = tok->previous();
}
else if (Token::Match(tok, "%var% != 0"))
{
deleteFrom = tok;
}
else if (Token::Match(tok, "%var% .|:: %var% != 0"))
{
tok = tok->tokAt(2);
deleteFrom = tok;
}
}
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 = _tokens; 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 = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "if|while ( not %var%"))
{
tok->tokAt(2)->str("!");
ret = true;
}
else if (Token::Match(tok, "&& not %var%"))
{
tok->next()->str("!");
ret = true;
}
else if (Token::Match(tok, "|| not %var%"))
{
tok->next()->str("!");
ret = true;
}
// "%var%|) and %var%|("
else if (Token::Match(tok, "and|or") &&
((Token::Match(tok->previous(), "%var%") || tok->previous()->str() == ")") ||
(Token::Match(tok->next(), "%var%") || tok->next()->str() == "(")))
{
if (tok->str() == "and")
tok->str("&&");
else
tok->str("||");
ret = true;
}
}
return ret;
}
// int i(0); => int i; i = 0;
void Tokenizer::simplifyInitVar()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "[{};] class|struct|union| %type% *| %var% ( &| %any% ) ;"))
tok = initVar(tok->next());
else if (tok == _tokens && Token::Match(tok, "class|struct|union| %type% *| %var% ( &| %any% ) ;"))
tok = initVar(tok);
}
}
static bool isOp(const Token *tok)
{
return bool(tok &&
(tok->str() == "&&" ||
tok->str() == "||" ||
tok->str() == "==" ||
tok->str() == "!=" ||
tok->str() == "<" ||
tok->str() == "<=" ||
tok->str() == ">" ||
tok->str() == ">=" ||
tok->str() == "<<" ||
tok->str() == ">>" ||
Token::Match(tok, "[;+-*/%&|^]")));
}
Token * Tokenizer::initVar(Token * tok)
{
// call constructor of class => no simplification
if (Token::Match(tok, "class|struct|union"))
{
if (tok->tokAt(2)->str() != "*")
return tok;
tok = tok->next();
}
else if (!tok->isStandardType() && tok->tokAt(1)->str() != "*")
return tok;
// goto variable name..
tok = tok->next();
if (tok->str() == "*")
tok = tok->next();
// check initializer..
if (tok->tokAt(2)->isStandardType() || tok->tokAt(2)->str() == "void")
return tok;
else if (!tok->tokAt(2)->isNumber() && tok->tokAt(2)->str() != "&" && tok->tokAt(2)->varId() == 0)
return tok;
// insert '; var ='
tok->insertToken(";");
tok->next()->insertToken(tok->str());
tok = tok->tokAt(2);
tok->insertToken("=");
// remove parantheses..
tok = tok->next();
tok->deleteNext();
tok = tok->next();
if (tok->str() == "&")
tok = tok->next();
tok->deleteNext();
return tok;
}
bool Tokenizer::simplifyKnownVariables()
{
bool ret = false;
for (Token *tok = _tokens; 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 (tok2->str() == "{")
++indentlevel;
else if (tok2->str() == "}")
{
--indentlevel;
if (indentlevel <= 0)
break;
}
else if (tok2->previous()->str() != "*" &&
(Token::Match(tok2, "%var% = %num% ;") ||
Token::Match(tok2, "%var% = %str% ;") ||
Token::Match(tok2, "%var% [ ] = %str% ;") ||
Token::Match(tok2, "%var% = %bool% ;") ||
Token::Match(tok2, "%var% = %var% ;") ||
Token::Match(tok2, "%var% = & %var% ;") ||
Token::Match(tok2, "%var% = & %var% [ 0 ] ;")))
{
const unsigned int varid = tok2->varId();
if (varid == 0)
continue;
if (tok2->str() == tok2->strAt(2))
continue;
const bool pointeralias(tok2->tokAt(2)->isName() || tok2->tokAt(2)->str() == "&");
std::string value;
unsigned int valueVarId = 0;
Token *tok3 = NULL;
bool valueIsPointer = false;
if (Token::Match(tok2->tokAt(-2), "for ( %varid% = %num% ; %varid% <|<= %num% ; ++| %varid% ++| ) {", varid))
{
// is there a "break" in the for loop?
bool hasbreak = false;
unsigned int indentlevel4 = 0; // indentlevel for tok4
for (const Token *tok4 = tok2->previous()->link(); tok4; tok4 = tok4->next())
{
if (tok4->str() == "{")
++indentlevel4;
else if (tok4->str() == "}")
{
if (indentlevel4 <= 1)
break;
--indentlevel4;
}
else if (tok4->str() == "break")
{
hasbreak = true;
break;
}
}
if (hasbreak)
break;
// 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::toString(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 (value == "]")
{
value = tok2->strAt(4);
valueVarId = tok2->tokAt(4)->varId();
}
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;
}
if (Token::simpleMatch(tok2->next(), "= &"))
tok2 = tok2->tokAt(3);
tok3 = tok2->next();
}
Token* bailOutFromLoop = 0;
int indentlevel3 = indentlevel; // indentlevel for tok3
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->tokAt(-5)->str() == tok2->tokAt(-3)->str())
{
tok2 = tok2->tokAt(-4);
Token::eraseTokens(tok2, tok2->tokAt(5));
}
break;
}
}
// Stop if label is found
if (Token::Match(tok3, "; %type% : ;"))
break;
// Stop if return is found ..
if (indentlevel3 == 1)
{
if (tok3->str() == "return")
ret3 = true;
else if (tok3->str() == ";")
{
if (ret3 && !Token::simpleMatch(tok3->next(), "}"))
break;
ret3 = false;
}
}
if (pointeralias && Token::Match(tok3, ("!!= " + value).c_str()))
break;
// Stop if something like 'while (--var)' is found
if (tok3->str() == "while" || tok3->str() == "do")
{
const Token *endpar = tok3->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() &&
!Token::simpleMatch(tok3->previous()->link()->previous(), "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;
}
// Variable is used somehow in a non-defined pattern => bail out
if (tok3->varId() == varid)
break;
// Using the variable in condition..
if (Token::Match(tok3->previous(), "if ( %varid% ==|!=|<|<=|>|>=|)", varid) ||
Token::Match(tok3, "( %varid% ==|!=|<|<=|>|>=", varid) ||
Token::Match(tok3, "!|==|!=|<|<=|>|>= %varid% ==|!=|<|<=|>|>=|)", varid) ||
Token::Match(tok3->previous(), "strlen|free ( %varid% )", varid))
{
tok3 = tok3->next();
tok3->str(value);
tok3->varId(valueVarId);
ret = true;
}
// Variable is used in calculation..
if (Token::Match(tok3, "[=+-*/[] %varid% [=?+-*/;])]", varid) ||
Token::Match(tok3, "[(=+-*/[] %varid% <<|>>", varid) ||
Token::Match(tok3, "<< %varid% [+-*/;])]", varid) ||
Token::Match(tok3, ">> %varid% [+-*/;])]", varid) ||
Token::Match(tok3->previous(), "[=+-*/[] ( %varid%", varid))
{
tok3 = tok3->next();
tok3->str(value);
tok3->varId(valueVarId);
if (tok3->previous()->str() == "*" && valueIsPointer)
{
tok3 = tok3->previous();
tok3->deleteThis();
}
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 (tok3->next()->varId() == varid)
{
tok3->next()->str(value);
tok3->next()->varId(valueVarId);
ret = true;
}
else if (tok3->tokAt(3)->varId() == varid)
{
tok3->tokAt(3)->str(value);
tok3->tokAt(3)->varId(valueVarId);
ret = true;
}
}
if (indentlevel == indentlevel3 && Token::Match(tok3->next(), "%varid% ++|--", varid) && MathLib::isInt(value))
{
const std::string op(tok3->strAt(2));
if (Token::Match(tok3, "[{};] %any% %any% ;"))
{
Token::eraseTokens(tok3, tok3->tokAt(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->strAt(1));
tok2->tokAt(2)->str(value);
tok2->tokAt(2)->varId(valueVarId);
if (Token::Match(tok3, "[;{}] %any% %any% ;"))
{
Token::eraseTokens(tok3, tok3->tokAt(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) &&
isOp(tok3->tokAt(2)))
{
tok3->next()->str(value);
tok3->next()->varId(valueVarId);
}
else if (pointeralias && Token::Match(tok3, "return * %varid% ;", varid))
{
tok3->deleteNext();
tok3->next()->str(value);
tok3->next()->varId(valueVarId);
}
}
}
}
if (tok2)
tok = tok2->previous();
}
return ret;
}
void Tokenizer::elseif()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (!Token::simpleMatch(tok, "else if"))
continue;
int indent = 0;
for (Token *tok2 = tok; indent >= 0 && tok2; tok2 = tok2->next())
{
if (Token::Match(tok2, "(|{"))
++indent;
else if (Token::Match(tok2, ")|}"))
--indent;
if (indent == 0 && Token::Match(tok2, "}|;"))
{
if (tok2->next() && tok2->next()->str() != "else")
{
tok->insertToken("{");
tok2->insertToken("}");
Token::createMutualLinks(tok->next(), tok2->next());
break;
}
}
}
}
}
bool Tokenizer::simplifyRedundantParanthesis()
{
bool ret = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() != "(")
continue;
while (Token::simpleMatch(tok, "( (") &&
tok->link()->previous() == tok->next()->link())
{
// We have "(( *something* ))", remove the inner
// paranthesis
tok->deleteNext();
tok->link()->tokAt(-2)->deleteNext();
ret = true;
}
while (Token::Match(tok->previous(), "[;{(] ( %var% (") &&
tok->link()->previous() == tok->tokAt(2)->link())
{
// We have "( func ( *something* ))", remove the outer
// paranthesis
tok->link()->deleteThis();
tok->deleteThis();
ret = true;
}
while (Token::Match(tok->previous(), "[;{] ( delete %var% ) ;"))
{
// We have "( delete var )", remove the outer
// paranthesis
tok->tokAt(3)->deleteThis();
tok->deleteThis();
ret = true;
}
while (Token::Match(tok->previous(), "[;{] ( delete [ ] %var% ) ;"))
{
// We have "( delete [] var )", remove the outer
// paranthesis
tok->tokAt(5)->deleteThis();
tok->deleteThis();
ret = true;
}
if (!Token::simpleMatch(tok->tokAt(-2), "operator delete") &&
Token::Match(tok->previous(), "delete|; (") &&
Token::Match(tok->link(), ") ;|,"))
{
tok->link()->deleteThis();
tok->deleteThis();
ret = true;
}
if (Token::Match(tok->previous(), "[(!*;{}] ( %var% )") && tok->next()->varId() != 0)
{
// We have "( var )", remove the paranthesis
tok->deleteThis();
tok->deleteNext();
ret = true;
continue;
}
if (Token::Match(tok->previous(), "[(!] ( %var% . %var% )"))
{
// We have "( var . var )", remove the paranthesis
tok->deleteThis();
tok = tok->tokAt(2);
tok->deleteNext();
ret = true;
continue;
}
if (Token::Match(tok, "( ( %bool% )") ||
Token::Match(tok, "( ( %num% )"))
{
tok->tokAt(2)->deleteNext();
tok->deleteNext();
ret = true;
}
}
return ret;
}
void Tokenizer::simplifyReference()
{
for (Token *tok = _tokens; 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());
}
}
Token::eraseTokens(tok2, tok2->tokAt(7));
}
}
}
}
}
bool Tokenizer::simplifyCalculations()
{
bool ret = false;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok->next(), "* 1") || Token::simpleMatch(tok->next(), "1 *"))
{
Token::eraseTokens(tok, tok->tokAt(3));
ret = true;
}
// (1-2)
while (Token::Match(tok, "[[,(=<>+-*] %num% [+-*/] %num% [],);=<>+-*/]") ||
Token::Match(tok, "<< %num% [+-*/] %num% [],);=<>+-*/]") ||
Token::Match(tok, "[[,(=<>+-*] %num% [+-*/] %num% <<|>>") ||
Token::Match(tok, "<< %num% [+-*/] %num% <<"))
{
tok = tok->next();
// Don't simplify "%num% / 0"
if (Token::simpleMatch(tok->next(), "/ 0"))
continue;
// + and - are calculated after * and /
if (Token::Match(tok->next(), "[+-/]"))
{
if (tok->previous()->str() == "*")
continue;
if (Token::Match(tok->tokAt(3), "[*/]"))
continue;
}
if (Token::Match(tok->previous(), "- %num% - %num%"))
tok->str(MathLib::add(tok->str(), tok->tokAt(2)->str()));
else if (Token::Match(tok->previous(), "- %num% + %num%"))
tok->str(MathLib::subtract(tok->str(), tok->tokAt(2)->str()));
else
tok->str(MathLib::calculate(tok->str(), tok->tokAt(2)->str(), tok->strAt(1)[0], this));
Token::eraseTokens(tok, tok->tokAt(3));
// evaluate "2 + 2 - 2 - 2"
// as (((2 + 2) - 2) - 2) = 0
// instead of ((2 + 2) - (2 - 2)) = 4
if (Token::Match(tok->next(), "[+-*/]"))
{
tok = tok->previous();
continue;
}
ret = true;
}
// Remove parantheses around number..
if (!tok->isName() && Token::Match(tok->next(), "( %num% )"))
{
tok->deleteNext();
tok = tok->next();
tok->deleteNext();
ret = true;
}
// Remove parantheses around variable..
// keep parantheses here: dynamic_cast<Fred *>(p);
// keep parantheses here: A operator * (int);
if (!tok->isName() && tok->str() != ">" && Token::Match(tok->next(), "( %var% ) [;),+-*/><]]") && !Token::simpleMatch(tok->previous(), "operator") && !Token::Match(tok->tokAt(-1), "* )"))
{
tok->deleteNext();
tok = tok->next();
tok->deleteNext();
ret = true;
}
if (Token::simpleMatch(tok->previous(), "( 0 ||") ||
Token::simpleMatch(tok, "|| 0 )") ||
Token::simpleMatch(tok->previous(), "( 1 &&") ||
Token::simpleMatch(tok, "&& 1 )"))
{
tok->deleteThis();
tok->deleteThis();
}
if (Token::Match(tok, "%num% ==|!=|<=|>=|<|> %num%") &&
MathLib::isInt(tok->str()) &&
MathLib::isInt(tok->tokAt(2)->str()))
{
const std::string prev(tok->previous() ? tok->strAt(-1).c_str() : "");
const std::string after(tok->tokAt(3) ? tok->strAt(3).c_str() : "");
if ((prev == "(" || prev == "&&" || prev == "||") && (after == ")" || after == "&&" || after == "||"))
{
const int op1(MathLib::toLongNumber(tok->str()));
const std::string &cmp(tok->next()->str());
const int op2(MathLib::toLongNumber(tok->tokAt(2)->str()));
std::string result;
if (cmp == "==")
result = (op1 == op2) ? "1" : "0";
else if (cmp == "!=")
result = (op1 != op2) ? "1" : "0";
else if (cmp == "<=")
result = (op1 <= op2) ? "1" : "0";
else if (cmp == ">=")
result = (op1 >= op2) ? "1" : "0";
else if (cmp == "<")
result = (op1 < op2) ? "1" : "0";
else if (cmp == ">")
result = (op1 > op2) ? "1" : "0";
tok->str(result);
tok->deleteNext();
tok->deleteNext();
}
}
if (Token::Match(tok->previous(), "[([,=] %num% <<|>> %num%"))
{
const int op1(MathLib::toLongNumber(tok->str()));
const int op2(MathLib::toLongNumber(tok->tokAt(2)->str()));
int result;
if (tok->next()->str() == "<<")
result = op1 << op2;
else
result = op1 >> op2;
std::stringstream ss;
ss << result;
tok->str(ss.str());
tok->deleteNext();
tok->deleteNext();
}
}
return ret;
}
void Tokenizer::simplifyGoto()
{
std::list<Token *> gotos;
unsigned int indentlevel = 0;
Token *beginfunction = 0;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "{")
{
if (beginfunction == 0 && indentlevel == 0 && tok->link())
tok = tok->link();
else
++indentlevel;
}
else if (tok->str() == "}")
{
if (indentlevel == 0)
break; // break out - it seems the code is wrong
--indentlevel;
if (indentlevel == 0)
{
gotos.clear();
beginfunction = 0;
}
}
else if (indentlevel == 0 && Token::Match(tok, ") const| {"))
{
gotos.clear();
beginfunction = tok;
}
else if (Token::Match(tok, "goto %var% ;"))
gotos.push_back(tok);
else if (indentlevel == 1 && Token::Match(tok->previous(), "[};] %var% :"))
{
// Is this label at the end..
bool end = false;
int level = 0;
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next())
{
if (tok2->str() == "}")
{
--level;
if (level < 0)
{
end = true;
break;
}
}
else if (tok2->str() == "{")
{
++level;
}
if (Token::Match(tok2, "%var% :") || tok2->str() == "goto")
{
break;
}
}
if (!end)
continue;
const std::string name(tok->str());
tok->deleteThis();
tok->deleteThis();
if (Token::Match(tok, "; %any%"))
tok->deleteThis();
// 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();
token->deleteNext();
token->deleteNext();
token->deleteNext();
// 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;
int lev = 0;
for (const Token *tok2 = tok; tok2; tok2 = tok2->next())
{
if (tok2->str() == "}")
{
--lev;
if (lev < 0)
break;
}
if (tok2->str() == "{")
{
++lev;
}
else if (tok2->str() == "return")
{
ret = true;
if (indentlevel == 1 && lev == 0)
ret2 = true;
}
token->insertToken(tok2->str().c_str());
token = token->next();
token->linenr(tok2->linenr());
token->varId(tok2->varId());
if (ret2 && 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("return");
token = token->next();
token->insertToken(";");
token = token->next();
}
}
}
gotos.clear();
tok = beginfunction;
indentlevel = 0;
continue;
}
}
}
void Tokenizer::simplifyNestedStrcat()
{
for (Token *tok = _tokens; 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));
// Insert semicolon after the moved strcat()
tok->insertToken(";");
}
}
void Tokenizer::duplicateEnumError(const Token * tok1, const Token * tok2, const std::string & type)
{
if (!(_settings && _settings->_checkCodingStyle))
return;
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok1->linenr();
loc.setfile(file(tok1));
locationList.push_back(loc);
loc.line = tok2->linenr();
loc.setfile(file(tok2));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::style,
std::string(type + " '" + tok2->str() +
"' hides enumerator with same name"),
"variableHidingEnum");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
// 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)
{
// 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 && 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 of function argument
if (tok->previous()->str() == ",")
return false;
}
if (end)
{
if (Token::Match(end, ") {")) // function parameter ?
{
// look backwards
if (tok->previous()->str() == "enum" ||
(Token::Match(tok->previous(), "%type%") &&
tok->previous()->str() != "return"))
{
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
{
// look backwards
if (Token::Match(tok->previous(), "enum|,") ||
(Token::Match(tok->previous(), "%type%") &&
tok->previous()->str() != "return"))
{
duplicateEnumError(*tokPtr, name, "Variable");
return true;
}
}
}
}
return false;
}
void Tokenizer::simplifyEnum()
{
std::string className;
int classLevel = 0;
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "class|struct|namespace %any%"))
{
className = tok->next()->str();
classLevel = 0;
continue;
}
else if (tok->str() == "}")
{
--classLevel;
if (classLevel < 0)
className = "";
continue;
}
else if (tok->str() == "{")
{
++classLevel;
continue;
}
else if (Token::Match(tok, "enum {") ||
Token::Match(tok, "enum %type% {"))
{
Token * tok1;
Token * start = tok;
Token * end;
Token * enumType = 0;
if (tok->tokAt(1)->str() == "{")
tok1 = tok->tokAt(2);
else
{
enumType = tok->tokAt(1);
tok1 = tok->tokAt(3);
}
end = tok1->tokAt(-1)->link();
long 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.
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;
std::stack<Token *> links;
for (Token *tok2 = lastEnumValueStart; tok2 != lastEnumValueEnd->next(); tok2 = tok2->next())
{
tok1->insertToken(tok2->str());
tok1 = tok1->next();
// Check for links and fix them up
if (tok1->str() == "(" || tok1->str() == "[" || tok1->str() == "{")
links.push(tok1);
else if (tok1->str() == ")" || tok1->str() == "]" || tok1->str() == "}")
{
Token * link = links.top();
tok1->link(link);
link->link(tok1);
links.pop();
}
}
// value is previous expression + 1
tok1->insertToken("+");
tok1 = tok1->next();
tok1->insertToken(MathLib::toString<long>(lastValue));
enumValue = 0;
enumValueStart = valueStart->next();
enumValueEnd = tok1->next();
}
else
{
// value is previous numeric value + 1
tok1->insertToken(MathLib::toString<long>(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;
if (enumValueEnd->str() == "(" ||
enumValueEnd->str() == "[" ||
enumValueEnd->str() == "{")
level++;
while (enumValueEnd->next() &&
(!Token::Match(enumValueEnd->next(), "}|,") || level))
{
if (enumValueEnd->next()->str() == "(" ||
enumValueEnd->next()->str() == "[" ||
enumValueEnd->next()->str() == "{")
level++;
else if (enumValueEnd->next()->str() == ")" ||
enumValueEnd->next()->str() == "]" ||
enumValueEnd->next()->str() == "}")
level--;
enumValueEnd = enumValueEnd->next();
}
// remember this expression in case it needs to be incremented
lastEnumValueStart = enumValueStart;
lastEnumValueEnd = enumValueEnd;
// skip over expression
tok1 = enumValueEnd;
}
// find all uses of this enumerator and substitute it's value for it's name
if (enumName && (enumValue || (enumValueStart && enumValueEnd)))
{
const std::string pattern(className.empty() ? "" : (className + " :: " + enumName->str()).c_str());
int level = 1;
bool inScope = true;
bool exitThisScope = false;
int exitScope = 0;
bool simplify = false;
bool hasClass = false;
for (Token *tok2 = tok1->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() && Token::Match(tok2, pattern.c_str()))
{
simplify = true;
hasClass = true;
}
else if (inScope && !exitThisScope && tok2->str() == enumName->str())
{
if (Token::simpleMatch(tok2->previous(), "::") ||
(tok2->next() && Token::simpleMatch(tok2->next(), "::")))
{
// Don't replace this enum if it's preceded or followed by "::"
}
else if (!duplicateDefinition(&tok2, enumName))
{
simplify = true;
hasClass = false;
}
else
{
// something with the same name.
exitScope = level;
}
}
if (simplify)
{
if (enumValue)
tok2->str(enumValue->strAt(0));
else
{
std::stack<Token *> links;
tok2->str(enumValueStart->strAt(0));
if (tok2->str() == "(" || tok2->str() == "[" || tok2->str() == "{")
links.push(tok2);
Token * nextToken = enumValueStart->next();
for (; nextToken != enumValueEnd->next(); nextToken = nextToken->next())
{
tok2->insertToken(nextToken->str());
tok2 = tok2->next();
// 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() == "}")
{
Token * link = links.top();
tok2->link(link);
link->link(tok2);
links.pop();
}
}
}
if (hasClass)
{
tok2->deleteNext();
tok2->deleteNext();
}
simplify = false;
}
}
}
}
// check for a variable definition: enum {} x;
if (end->next()->str() != ";")
{
Token * tempTok = end;
tempTok->insertToken(";");
tempTok = tempTok->next();
tempTok->insertToken("int");
}
if (enumType)
{
const std::string pattern(className.empty() ? "" : (className + " :: " + enumType->str()).c_str());
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() && ((Token::Match(tok2, "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()->str() == enumType->str())))
{
if (Token::simpleMatch(tok2->previous(), "::"))
{
// Don't replace this enum if it's preceded by "::"
}
else if (tok2->next() && tok2->next()->isName())
{
simplify = true;
hasClass = false;
}
}
if (simplify)
{
if (tok2->str() == "enum")
tok2->deleteNext();
tok2->str("int");
if (hasClass)
{
tok2->deleteNext();
tok2->deleteNext();
}
simplify = false;
}
}
}
tok1 = start;
while (tok1->next() && tok1->next() != end)
tok1->deleteNext();
tok1->deleteNext();
if (start != _tokens)
{
tok1 = start->previous();
tok1->deleteNext();
tok = tok1;
}
else
_tokens->deleteThis();
}
}
}
void Tokenizer::simplifyStd()
{
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 = _tokens; 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
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
const Token *Tokenizer::getFunctionTokenByName(const char funcname[]) const
{
for (unsigned int i = 0; i < _functionList.size(); ++i)
{
if (_functionList[i]->str() == funcname)
{
return _functionList[i];
}
}
return NULL;
}
void Tokenizer::fillFunctionList()
{
_functionList.clear();
for (const Token *tok = _tokens; tok; tok = tok->next())
{
if (tok->str() == "{")
{
tok = tok->link();
if (!tok)
break;
continue;
}
if (Token::Match(tok, "%var% ("))
{
// Check if this is the first token of a function implementation..
for (const Token *tok2 = tok->tokAt(2); tok2; tok2 = tok2->next())
{
if (tok2->str() == ";")
{
tok = tok2;
break;
}
else if (tok2->str() == "{")
{
break;
}
else if (tok2->str() == ")")
{
if (Token::Match(tok2, ") const| {"))
{
_functionList.push_back(tok);
tok = tok2;
}
else
{
tok = tok2;
while (tok->next() && !Token::Match(tok->next(), "[;{]"))
tok = tok->next();
}
break;
}
}
}
}
// If the _functionList functions with duplicate names, remove them
/** @todo handle when functions with the same name */
for (unsigned int func1 = 0; func1 < _functionList.size();)
{
bool hasDuplicates = false;
for (unsigned int func2 = func1 + 1; func2 < _functionList.size();)
{
if (_functionList[func1]->str() == _functionList[func2]->str())
{
hasDuplicates = true;
_functionList.erase(_functionList.begin() + func2);
}
else
{
++func2;
}
}
if (! hasDuplicates)
{
++func1;
}
else
{
_functionList.erase(_functionList.begin() + func1);
}
}
}
//---------------------------------------------------------------------------
// Deallocate lists..
void Tokenizer::deallocateTokens()
{
deleteTokens(_tokens);
_tokens = 0;
_tokensBack = 0;
_files.clear();
}
void Tokenizer::deleteTokens(Token *tok)
{
while (tok)
{
Token *next = tok->next();
delete tok;
tok = next;
}
}
//---------------------------------------------------------------------------
const char *Tokenizer::getParameterName(const Token *ftok, int par)
{
int _par = 1;
for (; ftok; ftok = ftok->next())
{
if (ftok->str() == ",")
++_par;
if (par == _par && Token::Match(ftok, "%var% [,)]"))
return ftok->str().c_str();
}
return NULL;
}
//---------------------------------------------------------------------------
std::string Tokenizer::fileLine(const Token *tok) const
{
std::ostringstream ostr;
ostr << "[" << _files.at(tok->fileIndex()) << ":" << tok->linenr() << "]";
return ostr.str();
}
std::string Tokenizer::file(const Token *tok) const
{
return _files.at(tok->fileIndex());
}
//---------------------------------------------------------------------------
const Token * Tokenizer::findClassFunction(const Token *tok, const std::string &classname, const std::string &funcname, int &indentlevel, bool isStruct) const
{
if (indentlevel < 0 || tok == NULL)
return NULL;
/*
// TODO: This is currently commented out as updateClassList doesn't
// fully work yet and call to updateClassList is currently also
// commented out.
//std::cout << tok->str()<<"--\n";
if( tok == _tokens || tok->str() == "class" || tok->str() == "struct")
tok = 0;
std::map<std::string, ClassInfo>::const_iterator iter;
iter = _classInfoList.find(classname);
if( iter == _classInfoList.end() )
return NULL;
for( size_t i = 0; i < iter->second._memberFunctions.size(); i++ )
if( Token::Match( iter->second._memberFunctions[i]._declaration, funcname ) )
{
if( tok != 0 )
{
if( tok == iter->second._memberFunctions[i]._implementation ||
tok->previous() == iter->second._memberFunctions[i]._implementation)
tok = 0;
continue;
}
return iter->second._memberFunctions[i]._implementation;
}
return NULL;
*/
const std::string classPattern(std::string(isStruct ? "struct " : "class ") + classname + " :|{");
const std::string internalPattern(std::string("!!~ ") + funcname + " (");
const std::string externalPattern(classname + " :: " + funcname + " (");
for (; tok; tok = tok->next())
{
if (indentlevel == 0 && Token::Match(tok, classPattern.c_str()))
{
while (tok && tok->str() != "{")
tok = tok->next();
if (tok)
tok = tok->next();
if (! tok)
break;
indentlevel = 1;
}
if (tok->str() == "{")
{
// If indentlevel==0 don't go to indentlevel 1. Skip the block.
if (indentlevel > 0)
++indentlevel;
else
{
// skip the block
tok = tok->link();
if (tok == NULL)
return NULL;
continue;
}
}
if (tok->str() == "}")
{
--indentlevel;
if (indentlevel < 0)
return NULL;
}
if (indentlevel == 1)
{
// Member function implemented in the class declaration?
if (Token::Match(tok->previous(), internalPattern.c_str()))
{
const Token *tok2 = tok;
while (tok2 && tok2->str() != "{" && tok2->str() != ";")
tok2 = tok2->next();
if (tok2 && tok2->str() == "{")
return tok;
}
}
else if (indentlevel == 0 && Token::Match(tok, externalPattern.c_str()))
{
if (!Token::simpleMatch(tok->previous(), "::"))
return tok;
}
}
// Not found
return NULL;
}
//---------------------------------------------------------------------------
void Tokenizer::syntaxError(const Token *tok)
{
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
if (tok)
{
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok->linenr();
loc.setfile(file(tok));
locationList.push_back(loc);
}
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::error,
"syntax error",
"syntaxError");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
void Tokenizer::syntaxError(const Token *tok, char c)
{
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
if (tok)
{
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok->linenr();
loc.setfile(file(tok));
locationList.push_back(loc);
}
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::error,
std::string("Invalid number of character (") +
c +
") " +
"when these macros are defined: '" +
_configuration +
"'.",
"syntaxError");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
void Tokenizer::cppcheckError(const Token *tok) const
{
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
if (tok)
{
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok->linenr();
loc.setfile(file(tok));
locationList.push_back(loc);
}
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::error,
"### Internal error in Cppcheck. Please report it.",
"cppcheckError");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
void Tokenizer::simplifyMathFunctions()
{
for (Token *tok = _tokens; 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->previous()->previous(), "std ::"))
{
// Delete "std ::"
tok = tok->previous()->previous();
tok->deleteNext();
tok->deleteThis();
}
// Delete atol(
tok->deleteNext();
tok->deleteThis();
// Convert string into a number
tok->str(MathLib::toString(MathLib::toLongNumber(tok->strValue())));
// Delete remaining )
tok->deleteNext();
}
}
}
void Tokenizer::simplifyComma()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "for (") ||
Token::Match(tok, "=|enum {"))
{
tok = tok->next()->link();
if (!tok)
break;
continue;
}
if (tok->str() == "(")
{
tok = tok->link();
continue;
}
// Skip unhandled template specifiers..
if (Token::Match(tok, "%var% <"))
{
// Todo.. use the link instead.
unsigned int comparelevel = 0;
for (Token *tok2 = tok; tok2; tok2 = tok2->next())
{
if (tok2->str() == "<")
++comparelevel;
else if (tok2->str() == ">")
{
if (comparelevel <= 1)
{
tok = tok2;
break;
}
++comparelevel;
}
else if (Token::Match(tok2, "[;{}]"))
break;
}
}
// If token after the comma is a constant number, simplification is not required.
if (tok->str() != "," || Token::Match(tok->next(), "%num%"))
continue;
// We must not accept just any keyword, e.g. accepting int
// would cause function parameters to corrupt.
if (Token::Match(tok->next(), "delete"))
{
// Handle "delete a, delete b;"
tok->str(";");
}
if (tok->previous() && tok->previous()->previous())
{
if (Token::Match(tok->previous()->previous(), "delete") &&
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; // next tokean after "; return"
Token *endAt = NULL; // first ";" token after "; return"
// find "; return" pattern before comma
for (Token *tok2 = tok; tok2; tok2 = tok2->previous())
{
if (Token::Match(tok2, "[;{}]"))
{
break;
}
else if (tok2->str() == "return" && Token::Match(tok2->previous(), "[;{}]"))
{
inReturn = true;
startFrom = tok2->next();
break;
}
}
// find token where return ends and also count commas
if (inReturn)
{
size_t commaCounter = 0;
size_t indentlevel = 0;
for (Token *tok2 = startFrom; tok2; tok2 = tok2->next())
{
if (tok2->str() == ";")
{
endAt = tok2;
break;
}
else if (tok2->str() == "(")
{
++indentlevel;
}
else if (tok2->str() == ")")
{
--indentlevel;
}
else if (tok2->str() == "," && indentlevel == 0)
{
++commaCounter;
}
}
if (commaCounter)
{
indentlevel = 0;
// change tokens:
// "; return a ( ) , b ( ) , c ;"
// to
// "; return a ( ) ; b ( ) ; c ;"
for (Token *tok2 = startFrom; tok2 != endAt; tok2 = tok2->next())
{
if (tok2->str() == "(")
{
++indentlevel;
}
else if (tok2->str() == ")")
{
--indentlevel;
}
else if (tok2->str() == "," && indentlevel == 0)
{
tok2->str(";");
--commaCounter;
if (commaCounter == 0)
{
tok2->insertToken("return");
}
}
}
// delete old "return"
startFrom->previous()->deleteThis();
startFrom = 0; // give dead pointer a value
tok = endAt;
if (!tok)
return;
}
}
}
}
void Tokenizer::removeExceptionSpecifications(Token *tok) const
{
while (tok)
{
if (tok->str() == "{")
tok = tok->link();
else if (tok->str() == "}")
break;
else if (Token::simpleMatch(tok, ") throw ("))
{
Token::eraseTokens(tok, tok->tokAt(2)->link());
tok->deleteNext();
}
else if (Token::Match(tok, "class %type%"))
{
while (tok && !Token::Match(tok, "[;{]"))
tok = tok->next();
if (tok && tok->str() == "{")
{
removeExceptionSpecifications(tok->next());
tok = tok->link();
}
}
tok = tok ? tok->next() : 0;
}
}
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, "[{([]"))
{
if (tok->link() == 0)
{
cppcheckError(tok);
return false;
}
linktok.push(tok);
continue;
}
else if (Token::Match(tok, "[})]]"))
{
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();
continue;
}
if (tok->link() != 0)
{
cppcheckError(tok);
return false;
}
}
if (!linktok.empty())
{
cppcheckError(linktok.top());
return false;
}
// Validate that the Tokenizer::_tokensBack is updated correctly during simplifications
if (lastTok != _tokensBack)
{
cppcheckError(lastTok);
return false;
}
return true;
}
std::string Tokenizer::simplifyString(const std::string &source)
{
std::string str = source;
bool escaped = false;
for (std::string::size_type i = 0; i + 2 < str.size(); i++)
{
if (!escaped)
{
if (str[i] == '\\')
escaped = true;
continue;
}
if (str[i] == 'x')
{
// Hex value
if (str[i+1] == '0' && str[i+2] == '0')
str.replace(i, 3, "0");
else
{
// We will replace all other character as 'a'
// If that causes problems in the future, this can
// be improved. But for now, this should be OK.
int n = 1;
while (n < 2 && std::isxdigit(str[i+1+n]))
++n;
--i;
str.replace(i, 2 + n, "a");
}
}
else if (MathLib::isOctalDigit(str[i]))
{
if (MathLib::isOctalDigit(str[i+1]) &&
MathLib::isOctalDigit(str[i+2]))
{
if (str[i+1] == '0' && str[i+2] == '0')
str.replace(i, 3, "0");
else
{
// We will replace all other character as 'a'
// If that causes problems in the future, this can
// be improved. But for now, this should be OK.
--i;
str.replace(i, 4, "a");
}
}
}
escaped = false;
}
return str;
}
void Tokenizer::simplifyStructInit()
{
for (Token *tok = _tokens; 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% [,}]"))
tok2 = tok2->tokAt(4);
else if (Token::Match(tok2, ". %type% = %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::Match(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 = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "[;(] %any% >|>= %any% [);]"))
{
if (!tok->next()->isName() && !tok->next()->isNumber())
continue;
const std::string op1(tok->strAt(1));
tok->next()->str(tok->strAt(3));
tok->tokAt(3)->str(op1);
if (tok->tokAt(2)->str() == ">")
tok->tokAt(2)->str("<");
else
tok->tokAt(2)->str("<=");
}
else if (Token::Match(tok, "( %num% ==|!= %var% )"))
{
if (!tok->next()->isName() && !tok->next()->isNumber())
continue;
const std::string op1(tok->strAt(1));
tok->next()->str(tok->strAt(3));
tok->tokAt(3)->str(op1);
}
}
}
void Tokenizer::simplifyConst()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok, "[;{}(,] %type% const") &&
tok->next()->str().find(":") == std::string::npos &&
tok->next()->str() != "operator")
{
tok->tokAt(2)->str(tok->tokAt(1)->str());
tok->tokAt(1)->str("const");
}
}
}
void Tokenizer::getErrorMessages()
{
syntaxError(0, ' ');
cppcheckError(0);
}
/** find pattern */
static bool findmatch(const Token *tok1, const Token *tok2, const char pattern[])
{
for (const Token *tok = tok1; tok && tok != tok2; tok = tok->next())
{
if (Token::Match(tok, pattern))
return true;
}
return false;
}
void Tokenizer::simplifyWhile0()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (!Token::simpleMatch(tok, "while ( 0 )"))
continue;
if (Token::simpleMatch(tok->previous(), "}"))
{
// find "do"
Token *tok2 = tok->previous()->link();
tok2 = tok2 ? tok2->previous() : 0;
if (tok2 && tok2->str() == "do" && !findmatch(tok2, tok, "continue|break"))
{
// delete "do {"
tok2->deleteThis();
tok2->deleteThis();
// delete "} while ( 0 )"
tok = tok->previous();
tok->deleteNext(); // while
tok->deleteNext(); // (
tok->deleteNext(); // 0
tok->deleteNext(); // )
tok->deleteThis(); // }
continue;
}
}
// remove "while (0) { .. }"
if (Token::simpleMatch(tok->tokAt(4), "{"))
{
const Token *end = tok->tokAt(4)->link();
if (!findmatch(tok, end, "continue|break"))
{
Token::eraseTokens(tok, end ? end->next() : 0);
tok->deleteThis(); // delete "while"
}
}
}
}
void Tokenizer::simplifyErrNoInWhile()
{
for (Token *tok = _tokens; 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"
Token::eraseTokens(tok1->previous(), endpar);
// tok is invalid.. move to endpar
tok = endpar;
}
}
}
void Tokenizer::simplifyFuncInWhile()
{
for (Token *tok = _tokens; 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->tokAt(7)->link();
if (!end)
break;
tok->str("int");
tok->insertToken("cppcheck:r");
tok->tokAt(1)->insertToken("=");
tok->tokAt(2)->insertToken(func->str());
tok->tokAt(3)->insertToken("(");
tok->tokAt(4)->insertToken(var->str());
tok->tokAt(5)->varId(var->varId());
tok->tokAt(5)->insertToken(")");
tok->tokAt(6)->insertToken(";");
tok->tokAt(7)->insertToken("while");
tok->tokAt(9)->insertToken("cppcheck:r");
Token::createMutualLinks(tok->tokAt(4), tok->tokAt(6));
end->previous()->insertToken("cppcheck:r");
end->previous()->insertToken("=");
Token::move(func, func->tokAt(3), end->previous());
end->previous()->insertToken(";");
tok = end;
}
}
void Tokenizer::simplifyStructDecl()
{
unsigned int count = 0;
for (Token *tok = _tokens; tok; tok = tok->next())
{
// check for named struct/union
if (Token::Match(tok, "struct|union %type% :|{"))
{
Token *type = tok->next();
Token *next = tok->tokAt(2);
while (next->str() != "{")
next = next->next();
tok = next->link();
// check for named type
if (Token::Match(tok->next(), "*|&| %type% ,|;|["))
{
tok->insertToken(";");
tok = tok->next();
tok->insertToken(type->str().c_str());
}
tok = next;
}
// check for anonymous struct/union
else if (Token::Match(tok, "struct|union {"))
{
Token *tok1 = tok;
tok = tok->next()->link();
// check for named type
if (Token::Match(tok->next(), "*|&| %type% ,|;|["))
{
std::string name;
name = "Anonymous" + MathLib::toString<long>(count++);
tok1->insertToken(name.c_str());
tok->insertToken(";");
tok = tok->next();
tok->insertToken(name.c_str());
}
// unnamed anonymous struct/union so remove it
else if (tok->next()->str() == ";")
{
tok1->deleteThis();
if (tok1->next() == tok)
{
tok1->deleteThis();
tok = tok1;
}
else
tok1->deleteThis();
tok->deleteThis();
if (tok->next())
tok->deleteThis();
if (!tok->next())
return;
}
tok = tok1->next();
}
}
}
void Tokenizer::simplifyCallingConvention()
{
const char * pattern = "__cdecl|__stdcall|__fastcall|__thiscall|__clrcall|__syscall|__pascal|__fortran|__far|__near|WINAPI|APIENTRY|CALLBACK";
while (Token::Match(_tokens, pattern))
{
_tokens->deleteThis();
}
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (Token::Match(tok->next(), pattern))
{
tok->deleteNext();
}
}
}
void Tokenizer::simplifyDeclspec()
{
while (Token::simpleMatch(_tokens, "__declspec (") && _tokens->next()->link() && _tokens->next()->link()->next())
{
Token::eraseTokens(_tokens, _tokens->next()->link()->next());
_tokens->deleteThis();
}
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok, "__declspec (") && tok->next()->link() && tok->next()->link()->next())
{
Token::eraseTokens(tok, tok->next()->link()->next());
tok->deleteThis();
}
}
}
void Tokenizer::simplifyAttribute()
{
while (Token::simpleMatch(_tokens, "__attribute__ (") && _tokens->next()->link() && _tokens->next()->link()->next())
{
Token::eraseTokens(_tokens, _tokens->next()->link()->next());
_tokens->deleteThis();
}
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (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", and "restrict"
void Tokenizer::simplifyKeyword()
{
const char pattern[] = "volatile|inline|__inline|__forceinline|register|restrict|__restrict__";
while (Token::Match(_tokens, pattern))
{
_tokens->deleteThis();
}
for (Token *tok = _tokens; tok; tok = tok->next())
{
while (Token::Match(tok->next(), pattern))
{
tok->deleteNext();
}
}
}
// Remove __asm..
void Tokenizer::simplifyAsm()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::Match(tok->next(), "__asm|_asm|asm {") &&
tok->tokAt(2)->link() &&
tok->tokAt(2)->link()->next())
{
Token::eraseTokens(tok, tok->tokAt(2)->link()->next());
}
else if (Token::Match(tok->next(), "__asm__ __volatile__ (") &&
tok->tokAt(3)->link() &&
tok->tokAt(3)->link()->next())
{
Token::eraseTokens(tok, tok->tokAt(3)->link()->next());
}
else if (Token::Match(tok->next(), "asm volatile (") &&
tok->tokAt(3)->link() &&
tok->tokAt(3)->link()->next())
{
Token::eraseTokens(tok, tok->tokAt(3)->link()->next());
}
else if (Token::simpleMatch(tok->next(), "__asm"))
{
const Token *tok2 = tok->next();
while (tok2 && (tok2->isNumber() || tok2->isName() || tok2->str() == ","))
tok2 = tok2->next();
if (tok2 && tok2->str() == ";")
Token::eraseTokens(tok, tok2);
else
continue;
}
else
continue;
// insert "asm ( )"
tok->insertToken(")");
tok->insertToken("(");
tok->insertToken("asm");
Token::createMutualLinks(tok->tokAt(2), tok->tokAt(3));
}
}
// Remove __builtin_expect(...), likely(...), and unlikely(...)
void Tokenizer::simplifyBuiltinExpect()
{
for (Token *tok = _tokens; tok; tok = tok->next())
{
if (Token::simpleMatch(tok->next(), "__builtin_expect ("))
{
unsigned int parlevel = 0;
for (Token *tok2 = tok->next(); tok2; tok2 = tok2->next())
{
if (tok2->str() == "(")
++parlevel;
else if (tok2->str() == ")")
{
if (parlevel <= 1)
break;
--parlevel;
}
if (parlevel == 1 && tok2->str() == ",")
{
if (Token::Match(tok2, ", %num% )"))
{
tok->deleteNext();
Token::eraseTokens(tok2->previous(), tok2->tokAt(2));
}
break;
}
}
}
else if (Token::Match(tok->next(), "likely|unlikely ("))
{
// remove closing ')'
tok->tokAt(2)->link()->previous()->deleteNext();
// remove "likely|unlikely ("
tok->deleteNext();
tok->deleteNext();
}
}
}
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