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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/>.
*/
//---------------------------------------------------------------------------
#include "symboldatabase.h"
#include "tokenize.h"
#include "token.h"
#include "settings.h"
#include "errorlogger.h"
#include "check.h"
#include <locale>
#include <cstring>
#include <string>
#include <sstream>
#include <algorithm>
//---------------------------------------------------------------------------
SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: _tokenizer(tokenizer), _settings(settings), _errorLogger(errorLogger)
{
// find all namespaces (class,struct and namespace)
SpaceInfo *info = new SpaceInfo(this, NULL, NULL);
spaceInfoList.push_back(info);
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next())
{
// Locate next class
if (Token::Match(tok, "class|struct|namespace %var% [{:]"))
{
SpaceInfo *new_info = new SpaceInfo(this, tok, info);
const Token *tok2 = tok->tokAt(2);
// only create base list for classes and structures
if (new_info->isClassOrStruct())
{
// goto initial '{'
tok2 = initBaseInfo(new_info, tok);
}
new_info->classStart = tok2;
new_info->classEnd = tok2->link();
info = new_info;
// add namespace
spaceInfoList.push_back(info);
tok = tok2;
}
else
{
// check for end of space
if (tok == info->classEnd)
{
info = info->nestedIn;
continue;
}
// check if in class or structure
else if (info->type == SpaceInfo::Class || info->type == SpaceInfo::Struct)
{
const Token *funcStart = 0;
const Token *argStart = 0;
// What section are we in..
if (tok->str() == "private:")
info->access = Private;
else if (tok->str() == "protected:")
info->access = Protected;
else if (tok->str() == "public:")
info->access = Public;
else if (Token::Match(tok, "public|protected|private %var% :"))
{
if (tok->str() == "private")
info->access = Private;
else if (tok->str() == "protected")
info->access = Protected;
else if (tok->str() == "public")
info->access = Public;
tok = tok->tokAt(2);
}
// class function?
else if (tok->previous()->str() != "::" && isFunction(tok, &funcStart, &argStart))
{
Func function;
// save the function definition argument start '('
function.argDef = argStart;
// save the access type
function.access = info->access;
// save the function name location
function.tokenDef = funcStart;
// operator function
if (function.tokenDef->previous()->str() == "operator")
{
function.isOperator = true;
// 'operator =' is special
if (function.tokenDef->str() == "=")
function.type = Func::OperatorEqual;
}
// class constructor/destructor
else if (function.tokenDef->str() == info->className)
{
if (function.tokenDef->previous()->str() == "~")
function.type = Func::Destructor;
else if ((Token::Match(function.tokenDef, "%var% ( const %var% & )") ||
Token::Match(function.tokenDef, "%var% ( const %var% & %var% )")) &&
function.tokenDef->strAt(3) == info->className)
function.type = Func::CopyConstructor;
else
function.type = Func::Constructor;
if (function.tokenDef->previous()->str() == "explicit")
function.isExplicit = true;
}
// function returning function pointer
else if (tok->str() == "(")
{
function.retFuncPtr = true;
}
const Token *tok1 = tok;
// look for end of previous statement
while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:"))
{
// virtual function
if (tok1->previous()->str() == "virtual")
{
function.isVirtual = true;
break;
}
// static function
else if (tok1->previous()->str() == "static")
{
function.isStatic = true;
break;
}
// friend function
else if (tok1->previous()->str() == "friend")
{
function.isFriend = true;
break;
}
tok1 = tok1->previous();
}
const Token *end;
if (!function.retFuncPtr)
end = function.argDef->link();
else
end = tok->link()->next()->link();
// const function
if (end->next()->str() == "const")
function.isConst = true;
// pure virtual function
if (Token::Match(end, ") const| = 0 ;"))
function.isPure = true;
// count the number of constructors
if (function.type == Func::Constructor || function.type == Func::CopyConstructor)
info->numConstructors++;
// assume implementation is inline (definition and implementation same)
function.token = function.tokenDef;
// out of line function
if (Token::Match(end, ") const| ;") ||
Token::Match(end, ") const| = 0 ;"))
{
// find the function implementation later
tok = end->next();
info->functionList.push_back(function);
}
// inline function
else
{
function.isInline = true;
function.hasBody = true;
function.arg = function.argDef;
info->functionList.push_back(function);
const Token *tok2 = funcStart;
SpaceInfo *functionOf = info;
addNewFunction(&info, &tok2);
info->functionOf = functionOf;
tok = tok2;
}
}
// nested class function?
else if (tok->previous()->str() == "::" && isFunction(tok, &funcStart, &argStart))
addFunction(&info, &tok, argStart);
// friend class declaration?
else if (Token::Match(tok, "friend class| %any% ;"))
{
FriendInfo friendInfo;
friendInfo.name = tok->strAt(1) == "class" ? tok->strAt(2) : tok->strAt(1);
/** @todo fill this in later after parsing is complete */
friendInfo.spaceInfo = 0;
info->friendList.push_back(friendInfo);
}
}
else if (info->type == SpaceInfo::Namespace || info->type == SpaceInfo::Global)
{
const Token *funcStart = 0;
const Token *argStart = 0;
// function?
if (isFunction(tok, &funcStart, &argStart))
{
// has body?
if (Token::Match(argStart->link(), ") const| {|:"))
{
// class function
if (tok->previous() && tok->previous()->str() == "::")
addFunction(&info, &tok, argStart);
// class destructor
else if (tok->previous() && tok->previous()->str() == "~" &&
tok->previous()->previous() && tok->previous()->previous()->str() == "::")
addFunction(&info, &tok, argStart);
// regular function
else
{
Func function;
// save the function definition argument start '('
function.argDef = argStart;
// save the access type
function.access = Public;
// save the function name location
function.tokenDef = funcStart;
function.token = funcStart;
function.isInline = false;
function.hasBody = true;
function.arg = function.argDef;
function.type = Func::Function;
info->functionList.push_back(function);
addNewFunction(&info, &tok);
}
}
// function returning function pointer with body
else if (Token::simpleMatch(argStart->link(), ") ) (") &&
Token::Match(argStart->link()->tokAt(2)->link(), ") const| {"))
{
const Token *tok1 = funcStart;
// class function
if (tok1->previous()->str() == "::")
addFunction(&info, &tok1, argStart);
// regular function
else
addNewFunction(&info, &tok1);
tok = tok1;
}
}
}
}
}
std::list<SpaceInfo *>::iterator it;
// fill in base class info
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
{
info = *it;
// skip namespaces and functions
if (!info->isClassOrStruct())
continue;
// finish filling in base class info
for (unsigned int i = 0; i < info->derivedFrom.size(); ++i)
{
std::list<SpaceInfo *>::iterator it1;
for (it1 = spaceInfoList.begin(); it1 != spaceInfoList.end(); ++it1)
{
SpaceInfo *spaceInfo = *it1;
/** @todo handle derived base classes and namespaces */
if (spaceInfo->type == SpaceInfo::Class || spaceInfo->type == SpaceInfo::Struct)
{
// do class names match?
if (spaceInfo->className == info->derivedFrom[i].name)
{
// are they in the same namespace or different namespaces with same name?
if ((spaceInfo->nestedIn == info->nestedIn) ||
((spaceInfo->nestedIn && spaceInfo->nestedIn->type == SpaceInfo::Namespace) &&
(info->nestedIn && info->nestedIn->type == SpaceInfo::Namespace) &&
(spaceInfo->nestedIn->className == info->nestedIn->className)))
{
info->derivedFrom[i].spaceInfo = spaceInfo;
break;
}
}
}
}
}
}
// fill in variable info
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
{
info = *it;
// skip functions
if (info->type != SpaceInfo::Function)
{
// find variables
info->getVarList();
}
}
// determine if user defined type needs initialization
unsigned int unknowns = 0; // stop checking when there are no unknowns
unsigned int retry = 0; // bail if we don't resolve all the variable types for some reason
do
{
unknowns = 0;
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
{
info = *it;
if (info->isClassOrStruct() && info->needInitialization == SpaceInfo::Unknown)
{
// check for default constructor
bool hasDefaultConstructor = false;
std::list<SymbolDatabase::Func>::const_iterator func;
for (func = info->functionList.begin(); func != info->functionList.end(); ++func)
{
if (func->type == SymbolDatabase::Func::Constructor)
{
// check for no arguments: func ( )
/** @todo check for arguents with default values someday */
if (func->argDef->next() == func->argDef->link())
{
hasDefaultConstructor = true;
break;
}
}
}
// User defined types with user defined defaut constructor doesn't need initialization.
// We assume the default constructor initializes everything.
// Another check will figure out if the constructor actually initializes everything.
if (hasDefaultConstructor)
info->needInitialization = SpaceInfo::False;
// check each member variable to see if it needs initialization
else
{
bool needInitialization = false;
bool unknown = false;
std::list<Var>::const_iterator var;
for (var = info->varlist.begin(); var != info->varlist.end(); ++var)
{
if (var->isClass)
{
if (var->type)
{
// does this type need initialization?
if (var->type->needInitialization == SpaceInfo::True)
needInitialization = true;
else if (var->type->needInitialization == SpaceInfo::Unknown)
unknown = true;
}
}
else
needInitialization = true;
}
if (!unknown)
{
if (needInitialization)
info->needInitialization = SpaceInfo::True;
else
info->needInitialization = SpaceInfo::False;
}
if (info->needInitialization == SpaceInfo::Unknown)
unknowns++;
}
}
}
retry++;
}
while (unknowns && retry < 100);
// this shouldn't happen so output a debug warning
if (retry == 100 && _settings->debugwarnings)
{
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
{
info = *it;
if (info->isClassOrStruct() && info->needInitialization == SpaceInfo::Unknown)
{
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = info->classDef->linenr();
loc.setfile(_tokenizer->file(info->classDef));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::debug,
"SymbolDatabase::SymbolDatabase couldn't resolve all user defined types.",
"debug");
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
}
}
}
SymbolDatabase::~SymbolDatabase()
{
std::list<SpaceInfo *>::iterator it;
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
delete *it;
}
bool SymbolDatabase::isFunction(const Token *tok, const Token **funcStart, const Token **argStart) const
{
// function returning function pointer? '... ( ... %var% ( ... ))( ... ) {'
if (tok->str() == "(" &&
tok->link()->previous()->str() == ")" &&
tok->link()->next() &&
tok->link()->next()->str() == "(" &&
tok->link()->next()->link()->next() &&
Token::Match(tok->link()->next()->link()->next(), "{|;|const|="))
{
*funcStart = tok->link()->previous()->link()->previous();
*argStart = tok->link()->previous()->link();
return true;
}
// regular function?
else if (Token::Match(tok, "%var% (") && Token::Match(tok->next()->link(), ") const| ;|{|=|:"))
{
*funcStart = tok;
*argStart = tok->next();
return true;
}
// simple operator?
else if (Token::Match(tok, "operator %any% (") && Token::Match(tok->tokAt(2)->link(), ") const| ;|{|=|:"))
{
*funcStart = tok->next();
*argStart = tok->tokAt(2);
return true;
}
// complex operator?
else if (tok->str() == "operator")
{
// operator[] or operator()?
if ((Token::simpleMatch(tok->next(), "( ) (") || Token::simpleMatch(tok->next(), "[ ] (")) &&
Token::Match(tok->tokAt(3)->link(), ") const| ;|{|=|:"))
{
*funcStart = tok->next();
*argStart = tok->tokAt(3);
return true;
}
// operator new/delete []?
else if (Token::Match(tok->next(), "new|delete [ ] (") && Token::Match(tok->tokAt(4)->link(), ") ;|{"))
{
*funcStart = tok->next();
*argStart = tok->tokAt(4);
return true;
}
}
return false;
}
bool SymbolDatabase::argsMatch(const SpaceInfo *info, const Token *first, const Token *second, const std::string &path, unsigned int depth) const
{
bool match = false;
while (first->str() == second->str())
{
// at end of argument list
if (first->str() == ")")
{
match = true;
break;
}
// skip default value assignment
else if (first->next()->str() == "=")
first = first->tokAt(2);
// definition missing variable name
else if (first->next()->str() == "," && second->next()->str() != ",")
second = second->next();
else if (first->next()->str() == ")" && second->next()->str() != ")")
second = second->next();
// function missing variable name
else if (second->next()->str() == "," && first->next()->str() != ",")
first = first->next();
else if (second->next()->str() == ")" && first->next()->str() != ")")
first = first->next();
// argument list has different number of arguments
else if (second->str() == ")")
break;
// variable names are different
else if ((Token::Match(first->next(), "%var% ,|)|=") &&
Token::Match(second->next(), "%var% ,|)")) &&
(first->next()->str() != second->next()->str()))
{
// skip variable names
first = first->next();
second = second->next();
// skip default value assignment
if (first->next()->str() == "=")
first = first->tokAt(2);
}
// variable with class path
else if (depth && Token::Match(first->next(), "%var%"))
{
std::string param = path + first->next()->str();
if (Token::Match(second->next(), param.c_str()))
{
second = second->tokAt(int(depth) * 2);
}
else if (depth > 1)
{
std::string short_path = path;
// remove last " :: "
short_path.resize(short_path.size() - 4);
// remove last name
while (!short_path.empty() && short_path[short_path.size() - 1] != ' ')
short_path.resize(short_path.size() - 1);
param = short_path + first->next()->str();
if (Token::Match(second->next(), param.c_str()))
{
second = second->tokAt((int(depth) - 1) * 2);
}
}
}
// nested class variable
else if (depth == 0 && Token::Match(first->next(), "%var%") &&
second->next()->str() == info->className && second->strAt(2) == "::" &&
first->next()->str() == second->strAt(3))
{
second = second->tokAt(2);
}
first = first->next();
second = second->next();
}
return match;
}
void SymbolDatabase::addFunction(SpaceInfo **info, const Token **tok, const Token *argStart)
{
int count = 0;
bool added = false;
std::string path;
unsigned int path_length = 0;
const Token *tok1;
// skip class/struct name
if ((*tok)->previous()->str() == "~")
tok1 = (*tok)->tokAt(-3);
else
tok1 = (*tok)->tokAt(-2);
// back up to head of path
while (tok1 && tok1->previous() && tok1->previous()->str() == "::")
{
path = tok1->str() + " :: " + path;
tok1 = tok1->tokAt(-2);
count++;
path_length++;
}
if (count)
{
path = tok1->str() + " :: " + path;
path_length++;
}
std::list<SpaceInfo *>::iterator it1;
// search for match
for (it1 = spaceInfoList.begin(); it1 != spaceInfoList.end(); ++it1)
{
SpaceInfo *info1 = *it1;
bool match = false;
if (info1->className == tok1->str() && (info1->type != SpaceInfo::Function))
{
// do the spaces match (same space) or do their names match (multiple namespaces)
if ((*info == info1->nestedIn) || (*info && info1 &&
(*info)->className == info1->nestedIn->className &&
!(*info)->className.empty() &&
(*info)->type == info1->nestedIn->type))
{
SpaceInfo *info2 = info1;
while (info2 && count > 0)
{
count--;
tok1 = tok1->tokAt(2);
info2 = info2->findInNestedList(tok1->str());
}
if (count == 0 && info2)
{
match = true;
info1 = info2;
}
}
}
if (match)
{
std::list<Func>::iterator func;
for (func = info1->functionList.begin(); func != info1->functionList.end(); ++func)
{
if (!func->hasBody)
{
if (func->isOperator &&
(*tok)->str() == "operator" &&
func->tokenDef->str() == (*tok)->strAt(1))
{
if (argsMatch(info1, func->tokenDef->tokAt(2), (*tok)->tokAt(3), path, path_length))
{
func->hasBody = true;
func->token = (*tok)->next();
func->arg = argStart;
}
}
else if (func->type == SymbolDatabase::Func::Destructor &&
(*tok)->previous()->str() == "~" &&
func->tokenDef->str() == (*tok)->str())
{
if (argsMatch(info1, func->tokenDef->next(), (*tok)->next(), path, path_length))
{
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
}
}
else if (func->tokenDef->str() == (*tok)->str() && (*tok)->previous()->str() != "~")
{
if (argsMatch(info1, func->tokenDef->next(), (*tok)->next(), path, path_length))
{
// normal function?
if (!func->retFuncPtr && (*tok)->next()->link())
{
if ((func->isConst && (*tok)->next()->link()->next()->str() == "const") ||
(!func->isConst && (*tok)->next()->link()->next()->str() != "const"))
{
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
}
}
// function returning function pointer?
else if (func->retFuncPtr)
{
// todo check for const
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
}
}
}
if (func->hasBody)
{
addNewFunction(info, tok);
(*info)->functionOf = info1;
added = true;
break;
}
}
}
}
}
// check for class function for unknown class
if (!added)
addNewFunction(info, tok);
}
void SymbolDatabase::addNewFunction(SymbolDatabase::SpaceInfo **info, const Token **tok)
{
const Token *tok1 = *tok;
SpaceInfo *new_info = new SpaceInfo(this, tok1, *info);
// skip to start of function
while (tok1 && tok1->str() != "{")
tok1 = tok1->next();
if (tok1)
{
new_info->classStart = tok1;
new_info->classEnd = tok1->link();
*info = new_info;
// add space
spaceInfoList.push_back(new_info);
*tok = tok1;
}
}
const Token *SymbolDatabase::initBaseInfo(SpaceInfo *info, const Token *tok)
{
// goto initial '{'
const Token *tok2 = tok->tokAt(2);
int level = 0;
while (tok2 && tok2->str() != "{")
{
// skip unsupported templates
if (tok2->str() == "<")
level++;
else if (tok2->str() == ">")
level--;
// check for base classes
else if (level == 0 && Token::Match(tok2, ":|,"))
{
BaseInfo base;
tok2 = tok2->next();
if (tok2->str() == "public")
{
base.access = Public;
tok2 = tok2->next();
}
else if (tok2->str() == "protected")
{
base.access = Protected;
tok2 = tok2->next();
}
else if (tok2->str() == "private")
{
base.access = Private;
tok2 = tok2->next();
}
else
{
if (tok->str() == "class")
base.access = Private;
else if (tok->str() == "struct")
base.access = Public;
}
// handle derived base classes
while (Token::Match(tok2, "%var% ::"))
{
base.name += tok2->str();
base.name += " :: ";
tok2 = tok2->tokAt(2);
}
base.name += tok2->str();
base.spaceInfo = 0;
// don't add unhandled templates
if (tok2->next()->str() == "<")
{
int level1 = 1;
while (tok2->next())
{
if (tok2->next()->str() == ">")
{
level1--;
if (level == 0)
break;
}
else if (tok2->next()->str() == "<")
level1++;
tok2 = tok2->next();
}
}
// save pattern for base class name
else
{
info->derivedFrom.push_back(base);
}
}
tok2 = tok2->next();
}
return tok2;
}
//---------------------------------------------------------------------------
SymbolDatabase::SpaceInfo::SpaceInfo(SymbolDatabase *check_, const Token *classDef_, SymbolDatabase::SpaceInfo *nestedIn_) :
check(check_),
classDef(classDef_),
classStart(NULL),
classEnd(NULL),
nestedIn(nestedIn_),
numConstructors(0),
needInitialization(SpaceInfo::Unknown),
functionOf(NULL)
{
if (!classDef)
{
type = SpaceInfo::Global;
access = Public;
}
else if (classDef->str() == "class")
{
type = SpaceInfo::Class;
className = classDef->next()->str();
access = Private;
}
else if (classDef->str() == "struct")
{
type = SpaceInfo::Struct;
className = classDef->next()->str();
access = Public;
}
else if (classDef->str() == "union")
{
type = SpaceInfo::Union;
className = classDef->next()->str();
access = Public;
}
else if (classDef->str() == "namespace")
{
type = SpaceInfo::Namespace;
className = classDef->next()->str();
access = Public;
}
else
{
type = SpaceInfo::Function;
className = classDef->str();
access = Public;
}
if (nestedIn)
nestedIn->nestedList.push_back(this);
}
// Get variable list..
void SymbolDatabase::SpaceInfo::getVarList()
{
AccessControl varaccess = type == Class ? Private : Public;
const Token *start;
if (classStart)
start = classStart->next();
else
start = check->_tokenizer->tokens();
for (const Token *tok = start; tok; tok = tok->next())
{
if (tok->str() == "}")
break;
// Is it a function?
else if (tok->str() == "{")
{
tok = tok->link();
continue;
}
// Is it a nested class or structure?
else if (Token::Match(tok, "class|struct|union|namespace %type% :|{"))
{
tok = tok->tokAt(2);
while (tok && tok->str() != "{")
tok = tok->next();
if (tok)
{
// skip implementation
tok = tok->link();
continue;
}
else
break;
}
// Borland C++: Skip all variables in the __published section.
// These are automaticly initialized.
else if (tok->str() == "__published:")
{
for (; tok; tok = tok->next())
{
if (tok->str() == "{")
tok = tok->link();
if (Token::Match(tok->next(), "private:|protected:|public:"))
break;
}
if (tok)
continue;
else
break;
}
// "private:" "public:" "protected:" etc
else if (tok->str() == "public:")
{
varaccess = Public;
continue;
}
else if (tok->str() == "protected:")
{
varaccess = Protected;
continue;
}
else if (tok->str() == "private:")
{
varaccess = Private;
continue;
}
// Is it a forward declaration?
else if (Token::Match(tok, "class|struct|union %var% ;"))
{
tok = tok->tokAt(2);
continue;
}
// Borland C++: Ignore properties..
else if (tok->str() == "__property")
continue;
// Search for start of statement..
else if (!tok->previous() || !Token::Match(tok->previous(), ";|{|}|public:|protected:|private:"))
continue;
else if (Token::Match(tok, ";|{|}"))
continue;
// This is the start of a statement
const Token *vartok = NULL;
const Token *typetok = NULL;
// Is it const..?
bool isConst = false;
if (tok->str() == "const")
{
tok = tok->next();
isConst = true;
}
// Is it a static variable?
const bool isStatic(Token::simpleMatch(tok, "static"));
if (isStatic)
{
tok = tok->next();
}
// Is it a mutable variable?
const bool isMutable(Token::simpleMatch(tok, "mutable"));
if (isMutable)
{
tok = tok->next();
}
// Is it const..?
if (tok->str() == "const")
{
tok = tok->next();
isConst = true;
}
bool isClass = false;
// Is it a variable declaration?
if (Token::Match(tok, "%type% %var% ;|:"))
{
if (!tok->isStandardType())
{
isClass = true;
typetok = tok;
}
vartok = tok->next();
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% %var% ;"))
{
isClass = true;
vartok = tok->tokAt(3);
typetok = vartok->previous();
tok = vartok->next();
}
else if (Token::Match(tok, ":: %type% :: %type% %var% ;"))
{
isClass = true;
vartok = tok->tokAt(4);
typetok = vartok->previous();
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% :: %type% %var% ;"))
{
isClass = true;
vartok = tok->tokAt(5);
typetok = vartok->previous();
tok = vartok->next();
}
else if (Token::Match(tok, ":: %type% :: %type% :: %type% %var% ;"))
{
isClass = true;
vartok = tok->tokAt(6);
typetok = vartok->previous();
tok = vartok->next();
}
// Structure?
else if (Token::Match(tok, "struct|union %type% %var% ;"))
{
isClass = true;
vartok = tok->tokAt(2);
typetok = vartok->previous();
tok = vartok->next();
}
// Pointer?
else if (Token::Match(tok, "%type% * %var% ;"))
{
vartok = tok->tokAt(2);
typetok = tok;
tok = vartok->next();
}
else if (Token::Match(tok, "%type% %type% * %var% ;"))
{
vartok = tok->tokAt(3);
typetok = vartok->tokAt(-2);
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% * %var% ;"))
{
vartok = tok->tokAt(4);
typetok = vartok->tokAt(-2);
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% :: %type% * %var% ;"))
{
vartok = tok->tokAt(6);
typetok = vartok->tokAt(-2);
tok = vartok->next();
}
// Array?
else if (Token::Match(tok, "%type% %var% [") && tok->next()->str() != "operator")
{
if (!tok->isStandardType())
{
isClass = true;
typetok = tok;
}
vartok = tok->next();
tok = vartok->next()->link()->next();
}
// Pointer array?
else if (Token::Match(tok, "%type% * %var% ["))
{
vartok = tok->tokAt(2);
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% * %var% ["))
{
vartok = tok->tokAt(4);
tok = vartok->next();
}
else if (Token::Match(tok, "%type% :: %type% :: %type% * %var% ["))
{
vartok = tok->tokAt(6);
tok = vartok->next();
}
// Container..
else if (Token::Match(tok, ":: %type% :: %type% :: %type% <") ||
Token::Match(tok, "%type% :: %type% :: %type% <") ||
Token::Match(tok, ":: %type% :: %type% <") ||
Token::Match(tok, "%type% :: %type% <") ||
Token::Match(tok, ":: %type% <") ||
Token::Match(tok, "%type% <"))
{
// got an unhandled template?
if (tok->str() == "template")
continue;
// find matching ">"
int level = 0;
const Token *tok1 = NULL;
for (; tok; tok = tok->next())
{
if (tok->str() == "<")
{
if (level == 0)
tok1 = tok->previous();
level++;
}
else if (tok->str() == ">")
{
level--;
if (level == 0)
break;
}
else if (tok->str() == ">>")
{
level-=2;
if (level <= 0)
break;
}
else if (tok->str() == "(")
tok = tok->link();
// don't crash on unhandled templates
if (tok->next() == NULL)
break;
}
if (tok && (Token::Match(tok, "> %var% ;") || Token::Match(tok, ">> %var% ;")))
{
isClass = true;
vartok = tok->next();
typetok = tok1;
tok = vartok->next();
}
else if (tok && (Token::Match(tok, "> :: %type% %var% ;") || Token::Match(tok, ">> :: %type% %var% ;")))
{
isClass = true;
vartok = tok->tokAt(3);
typetok = vartok->previous();
tok = vartok->next();
}
else if (tok && (Token::Match(tok, "> * %var% ;") || Token::Match(tok, ">> * %var% ;")))
{
vartok = tok->tokAt(2);
tok = vartok->next();
}
}
// If the vartok was set in the if-blocks above, create a entry for this variable..
if (vartok && vartok->str() != "operator")
{
if (vartok->varId() == 0 && check->_settings->debugwarnings)
{
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = vartok->linenr();
loc.setfile(check->_tokenizer->file(vartok));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::debug,
"SymbolDatabase::SpaceInfo::getVarList found variable \'" + vartok->str() + "\' with varid 0.",
"debug");
if (check->_errorLogger)
check->_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
const SpaceInfo *spaceInfo = NULL;
if (typetok)
spaceInfo = check->findVarType(this, typetok);
addVar(vartok, varaccess, isMutable, isStatic, isConst, isClass, spaceInfo);
}
}
}
//---------------------------------------------------------------------------
const SymbolDatabase::SpaceInfo *SymbolDatabase::findVarType(const SpaceInfo *start, const Token *type) const
{
std::list<SpaceInfo *>::const_iterator it;
for (it = spaceInfoList.begin(); it != spaceInfoList.end(); ++it)
{
const SpaceInfo *info = *it;
// skip namespaces and functions
if (info->type == SpaceInfo::Namespace || info->type == SpaceInfo::Function || info->type == SpaceInfo::Global)
continue;
// do the names match?
if (info->className == type->str())
{
// check if type does not have a namespace
if (type->previous()->str() != "::")
{
const SpaceInfo *parent = start;
// check if in same namespace
while (parent && parent != info->nestedIn)
parent = parent->nestedIn;
if (info->nestedIn == parent)
return info;
}
// type has a namespace
else
{
// FIXME check if namespace path matches supplied path
return info;
}
}
}
return NULL;
}
//---------------------------------------------------------------------------
SymbolDatabase::SpaceInfo * SymbolDatabase::SpaceInfo::findInNestedList(const std::string & name)
{
std::list<SpaceInfo *>::iterator it;
for (it = nestedList.begin(); it != nestedList.end(); ++it)
{
if ((*it)->className == name)
return (*it);
}
return 0;
}
//---------------------------------------------------------------------------
const SymbolDatabase::Func *SymbolDatabase::SpaceInfo::getDestructor() const
{
std::list<Func>::const_iterator it;
for (it = functionList.begin(); it != functionList.end(); ++it)
{
if (it->type == Func::Destructor)
return &*it;
}
return 0;
}
//---------------------------------------------------------------------------
unsigned int SymbolDatabase::SpaceInfo::getNestedNonFunctions() const
{
unsigned int nested = 0;
std::list<SpaceInfo *>::const_iterator ni;
for (ni = nestedList.begin(); ni != nestedList.end(); ++ni)
{
if ((*ni)->type != SpaceInfo::Function)
nested++;
}
return nested;
}
//---------------------------------------------------------------------------
void SymbolDatabase::SpaceInfo::assignVar(const std::string &varname)
{
std::list<Var>::iterator i;
for (i = varlist.begin(); i != varlist.end(); ++i)
{
if (i->token->str() == varname)
{
i->assign = true;
return;
}
}
}
void SymbolDatabase::SpaceInfo::initVar(const std::string &varname)
{
std::list<Var>::iterator i;
for (i = varlist.begin(); i != varlist.end(); ++i)
{
if (i->token->str() == varname)
{
i->init = true;
return;
}
}
}
void SymbolDatabase::SpaceInfo::assignAllVar()
{
std::list<Var>::iterator i;
for (i = varlist.begin(); i != varlist.end(); ++i)
i->assign = true;
}
void SymbolDatabase::SpaceInfo::clearAllVar()
{
std::list<Var>::iterator i;
for (i = varlist.begin(); i != varlist.end(); ++i)
{
i->assign = false;
i->init = false;
}
}
//---------------------------------------------------------------------------
bool SymbolDatabase::SpaceInfo::isBaseClassFunc(const Token *tok)
{
// Iterate through each base class...
for (unsigned int i = 0; i < derivedFrom.size(); ++i)
{
const SpaceInfo *info = derivedFrom[i].spaceInfo;
// Check if base class exists in database
if (info)
{
std::list<Func>::const_iterator it;
for (it = info->functionList.begin(); it != info->functionList.end(); ++it)
{
if (it->tokenDef->str() == tok->str())
return true;
}
}
// Base class not found so assume it is in it.
else
return true;
}
return false;
}
void SymbolDatabase::SpaceInfo::initializeVarList(const Func &func, std::list<std::string> &callstack)
{
bool Assign = false;
unsigned int indentlevel = 0;
const Token *ftok = func.token;
for (; ftok; ftok = ftok->next())
{
if (!ftok->next())
break;
// Class constructor.. initializing variables like this
// clKalle::clKalle() : var(value) { }
if (indentlevel == 0)
{
if (Assign && Token::Match(ftok, "%var% ("))
{
initVar(ftok->str());
// assignment in the initializer..
// : var(value = x)
if (Token::Match(ftok->tokAt(2), "%var% ="))
assignVar(ftok->strAt(2));
}
Assign |= (ftok->str() == ":");
}
if (ftok->str() == "{")
{
++indentlevel;
Assign = false;
}
else if (ftok->str() == "}")
{
if (indentlevel <= 1)
break;
--indentlevel;
}
if (indentlevel < 1)
continue;
// Variable getting value from stream?
if (Token::Match(ftok, ">> %var%"))
{
assignVar(ftok->strAt(1));
}
// Before a new statement there is "[{};)=]"
if (! Token::Match(ftok, "[{};()=]"))
continue;
if (Token::simpleMatch(ftok, "( !"))
ftok = ftok->next();
// Using the operator= function to initialize all variables..
if (Token::simpleMatch(ftok->next(), "* this = "))
{
assignAllVar();
break;
}
// Calling member variable function?
if (Token::Match(ftok->next(), "%var% . %var% ("))
{
std::list<Var>::const_iterator var;
for (var = varlist.begin(); var != varlist.end(); ++var)
{
if (var->token->varId() == ftok->next()->varId())
{
/** @todo false negative: we assume function changes variable state */
assignVar(ftok->next()->str());
continue;
}
}
ftok = ftok->tokAt(2);
}
if (!Token::Match(ftok->next(), "%var%") &&
!Token::Match(ftok->next(), "this . %var%") &&
!Token::Match(ftok->next(), "* %var% =") &&
!Token::Match(ftok->next(), "( * this ) . %var%"))
continue;
// Goto the first token in this statement..
ftok = ftok->next();
// Skip "( * this )"
if (Token::simpleMatch(ftok, "( * this ) ."))
{
ftok = ftok->tokAt(5);
}
// Skip "this->"
if (Token::simpleMatch(ftok, "this ."))
ftok = ftok->tokAt(2);
// Skip "classname :: "
if (Token::Match(ftok, "%var% ::"))
ftok = ftok->tokAt(2);
// Clearing all variables..
if (Token::simpleMatch(ftok, "memset ( this ,"))
{
assignAllVar();
return;
}
// Clearing array..
else if (Token::Match(ftok, "memset ( %var% ,"))
{
assignVar(ftok->strAt(2));
ftok = ftok->next()->link();
continue;
}
// Calling member function?
else if (Token::Match(ftok, "%var% (") && ftok->str() != "if")
{
// Passing "this" => assume that everything is initialized
for (const Token *tok2 = ftok->next()->link(); tok2 && tok2 != ftok; tok2 = tok2->previous())
{
if (tok2->str() == "this")
{
assignAllVar();
return;
}
}
// recursive call / calling overloaded function
// assume that all variables are initialized
if (std::find(callstack.begin(), callstack.end(), ftok->str()) != callstack.end())
{
assignAllVar();
return;
}
// check if member function
std::list<Func>::const_iterator it;
for (it = functionList.begin(); it != functionList.end(); ++it)
{
if (ftok->str() == it->tokenDef->str() && it->type != Func::Constructor)
break;
}
// member function found
if (it != functionList.end())
{
// member function has implementation
if (it->hasBody)
{
// initialize variable use list using member function
callstack.push_back(ftok->str());
initializeVarList(*it, callstack);
callstack.pop_back();
}
// there is a called member function, but it has no implementation, so we assume it initializes everything
else
{
assignAllVar();
}
}
// not member function
else
{
// could be a base class virtual function, so we assume it initializes everything
if (func.type != Func::Constructor && isBaseClassFunc(ftok))
{
/** @todo False Negative: we should look at the base class functions to see if they
* call any derived class virtual functions that change the derived class state
*/
assignAllVar();
}
// has friends, so we assume it initializes everything
if (!friendList.empty())
assignAllVar();
// the function is external and it's neither friend nor inherited virtual function.
// assume all variables that are passed to it are initialized..
else
{
unsigned int indentlevel2 = 0;
for (const Token *tok = ftok->tokAt(2); tok; tok = tok->next())
{
if (tok->str() == "(")
++indentlevel2;
else if (tok->str() == ")")
{
if (indentlevel2 == 0)
break;
--indentlevel2;
}
if (tok->isName())
{
assignVar(tok->str());
}
}
}
}
}
// Assignment of member variable?
else if (Token::Match(ftok, "%var% ="))
{
assignVar(ftok->str());
}
// Assignment of array item of member variable?
else if (Token::Match(ftok, "%var% [ %any% ] ="))
{
assignVar(ftok->str());
}
// Assignment of member of array item of member variable?
else if (Token::Match(ftok, "%var% [ %any% ] . %var% =") ||
Token::Match(ftok, "%var% [ %any% ] . %var% . %var% ="))
{
assignVar(ftok->str());
}
// Assignment of array item of member variable?
else if (Token::Match(ftok, "%var% [ %any% ] [ %any% ] ="))
{
assignVar(ftok->str());
}
// Assignment of array item of member variable?
else if (Token::Match(ftok, "* %var% ="))
{
assignVar(ftok->next()->str());
}
// Assignment of struct member of member variable?
else if (Token::Match(ftok, "%var% . %any% ="))
{
assignVar(ftok->str());
}
// The functions 'clear' and 'Clear' are supposed to initialize variable.
if (Token::Match(ftok, "%var% . clear|Clear ("))
{
assignVar(ftok->str());
}
}
}
bool SymbolDatabase::isMemberVar(const SymbolDatabase::SpaceInfo *info, const Token *tok)
{
const Token *tok1 = tok;
while (tok->previous() && !Token::Match(tok->previous(), "}|{|;|public:|protected:|private:|return|:|?"))
{
if (Token::Match(tok->previous(), "* this"))
return true;
tok = tok->previous();
}
if (tok->str() == "this")
return true;
if (Token::Match(tok, "( * %var% ) [") || (Token::Match(tok, "( * %var% ) <<") && tok1->next()->str() == "<<"))
tok = tok->tokAt(2);
// ignore class namespace
if (tok->str() == info->className && tok->next()->str() == "::")
tok = tok->tokAt(2);
std::list<Var>::const_iterator var;
for (var = info->varlist.begin(); var != info->varlist.end(); ++var)
{
if (var->token->str() == tok->str())
{
return !var->isMutable;
}
}
// not found in this class
if (!info->derivedFrom.empty())
{
// check each base class
for (unsigned int i = 0; i < info->derivedFrom.size(); ++i)
{
// find the base class
const SpaceInfo *spaceInfo = info->derivedFrom[i].spaceInfo;
// find the function in the base class
if (spaceInfo)
{
if (isMemberVar(spaceInfo, tok))
return true;
}
}
}
return false;
}
bool SymbolDatabase::isConstMemberFunc(const SymbolDatabase::SpaceInfo *info, const Token *tok)
{
std::list<Func>::const_iterator func;
for (func = info->functionList.begin(); func != info->functionList.end(); ++func)
{
if (func->tokenDef->str() == tok->str() && func->isConst)
return true;
}
// not found in this class
if (!info->derivedFrom.empty())
{
// check each base class
for (unsigned int i = 0; i < info->derivedFrom.size(); ++i)
{
// find the base class
const SymbolDatabase::SpaceInfo *spaceInfo = info->derivedFrom[i].spaceInfo;
// find the function in the base class
if (spaceInfo)
{
if (isConstMemberFunc(spaceInfo, tok))
return true;
}
}
}
return false;
}
bool SymbolDatabase::checkConstFunc(const SymbolDatabase::SpaceInfo *info, const Token *tok)
{
// if the function doesn't have any assignment nor function call,
// it can be a const function..
unsigned int indentlevel = 0;
bool isconst = true;
for (const Token *tok1 = tok; tok1; tok1 = tok1->next())
{
if (tok1->str() == "{")
++indentlevel;
else if (tok1->str() == "}")
{
if (indentlevel <= 1)
break;
--indentlevel;
}
// assignment.. = += |= ..
else if (tok1->str() == "=" ||
(tok1->str().find("=") == 1 &&
tok1->str().find_first_of("<!>") == std::string::npos))
{
if (tok1->previous()->varId() == 0 && !info->derivedFrom.empty())
{
isconst = false;
break;
}
else if (isMemberVar(info, tok1->previous()))
{
isconst = false;
break;
}
else if (tok1->previous()->str() == "]")
{
// TODO: I assume that the assigned variable is a member variable
// don't assume it
isconst = false;
break;
}
else if (tok1->next()->str() == "this")
{
isconst = false;
break;
}
// FIXME: I assume that a member union/struct variable is assigned.
else if (Token::Match(tok1->tokAt(-2), ". %var%"))
{
isconst = false;
break;
}
}
// streaming: <<
else if (tok1->str() == "<<" && isMemberVar(info, tok1->previous()))
{
isconst = false;
break;
}
// increment/decrement (member variable?)..
else if (Token::Match(tok1, "++|--"))
{
isconst = false;
break;
}
// function call..
else if (Token::Match(tok1, "%var% (") &&
!(Token::Match(tok1, "return|c_str|if|string") || tok1->isStandardType()))
{
if (!isConstMemberFunc(info, tok1))
{
isconst = false;
break;
}
}
else if (Token::Match(tok1, "%var% < %any% > ("))
{
isconst = false;
break;
}
// delete..
else if (tok1->str() == "delete")
{
isconst = false;
break;
}
}
return isconst;
}
//---------------------------------------------------------------------------
// check if this function is defined virtual in the base classes
bool SymbolDatabase::isVirtualFunc(const SymbolDatabase::SpaceInfo *info, const Token *functionToken) const
{
// check each base class
for (unsigned int i = 0; i < info->derivedFrom.size(); ++i)
{
// check if base class exists in database
if (info->derivedFrom[i].spaceInfo)
{
const SymbolDatabase::SpaceInfo *derivedFrom = info->derivedFrom[i].spaceInfo;
std::list<SymbolDatabase::Func>::const_iterator func;
// check if function defined in base class
for (func = derivedFrom->functionList.begin(); func != derivedFrom->functionList.end(); ++func)
{
if (func->isVirtual)
{
const Token *tok = func->tokenDef;
if (tok->str() == functionToken->str())
{
const Token *temp1 = tok->previous();
const Token *temp2 = functionToken->previous();
bool returnMatch = true;
// check for matching return parameters
while (temp1->str() != "virtual")
{
if (temp1->str() != temp2->str())
{
returnMatch = false;
break;
}
temp1 = temp1->previous();
temp2 = temp2->previous();
}
// check for matching function parameters
if (returnMatch && argsMatch(info, tok->tokAt(2), functionToken->tokAt(2), std::string(""), 0))
{
return true;
}
}
}
}
if (!derivedFrom->derivedFrom.empty())
{
if (isVirtualFunc(derivedFrom, functionToken))
return true;
}
}
else
{
// unable to find base class so assume it has a virtual function
return true;
}
}
return false;
}
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