cppcheck/lib/symboldatabase.cpp

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2010-11-13 08:08:45 +01:00
/*
* Cppcheck - A tool for static C/C++ code analysis
2012-01-01 00:05:37 +01:00
* Copyright (C) 2007-2012 Daniel Marjamäki and Cppcheck team.
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*
* 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 <string>
#include <sstream>
#include <climits>
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// Define ULLONG_MAX and LLONG_MAX for Borland
#ifdef __BORLANDC__
#define ULLONG_MAX ULONG_MAX
#define LLONG_MAX LONG_MAX
#endif
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//---------------------------------------------------------------------------
SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: _tokenizer(tokenizer), _settings(settings), _errorLogger(errorLogger)
{
// create global scope
scopeList.push_back(Scope(this, NULL, NULL));
// pointer to current scope
Scope *scope = &scopeList.back();
// Store current access in each scope (depends on evaluation progress)
std::map<const Scope*, AccessControl> access;
// find all scopes
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for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
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// Locate next class
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if (Token::Match(tok, "class|struct|union|namespace %var% [{:]")) {
scopeList.push_back(Scope(this, tok, scope));
Scope *new_scope = &scopeList.back();
if (tok->str() == "class")
access[new_scope] = Private;
else if (tok->str() == "struct")
access[new_scope] = Public;
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const Token *tok2 = tok->tokAt(2);
// only create base list for classes and structures
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if (new_scope->isClassOrStruct()) {
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// goto initial '{'
tok2 = new_scope->initBaseInfo(tok);
// make sure we have valid code
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if (!tok2) {
scopeList.pop_back();
break;
}
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}
new_scope->classStart = tok2;
new_scope->classEnd = tok2->link();
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// make sure we have valid code
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if (!new_scope->classEnd) {
scopeList.pop_back();
break;
}
// fill the classAndStructTypes set..
if (new_scope->isClassOrStruct())
classAndStructTypes.insert(new_scope->className);
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// make the new scope the current scope
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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tok = tok2;
}
// forward declaration
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else if (Token::Match(tok, "class|struct %var% ;")) {
// fill the classAndStructTypes set..
classAndStructTypes.insert(tok->next()->str());
/** @todo save forward declarations in database someday */
tok = tok->tokAt(2);
continue;
}
// using namespace
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else if (Token::Match(tok, "using namespace %type% ;|::")) {
// save location
scope->usingList.push_back(tok);
tok = tok->tokAt(3);
}
// unnamed struct and union
else if (Token::Match(tok, "struct|union {") &&
Token::Match(tok->next()->link(), "} *|&| %var% ;|[")) {
scopeList.push_back(Scope(this, tok, scope));
Scope *new_scope = &scopeList.back();
access[new_scope] = Public;
const Token* varNameTok = tok->next()->link()->next();
if (varNameTok->str() == "*") {
varNameTok = varNameTok->next();
} else if (varNameTok->str() == "&") {
varNameTok = varNameTok->next();
}
scope->addVariable(varNameTok, tok, tok, access[scope], new_scope, scope);
const Token *tok2 = tok->next();
new_scope->classStart = tok2;
new_scope->classEnd = tok2->link();
// make sure we have valid code
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if (!new_scope->classEnd) {
scopeList.pop_back();
break;
}
// make the new scope the current scope
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
tok = tok2;
}
// anonymous struct and union
else if (Token::Match(tok, "struct|union {") &&
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Token::simpleMatch(tok->next()->link(), "} ;")) {
scopeList.push_back(Scope(this, tok, scope));
Scope *new_scope = &scopeList.back();
access[new_scope] = Public;
const Token *tok2 = tok->next();
new_scope->classStart = tok2;
new_scope->classEnd = tok2->link();
// make sure we have valid code
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if (!new_scope->classEnd) {
scopeList.pop_back();
break;
}
// make the new scope the current scope
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
tok = tok2;
}
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else {
// check for end of scope
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if (tok == scope->classEnd) {
scope = scope->nestedIn;
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continue;
}
// check if in class or structure
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else if (scope->type == Scope::eClass || scope->type == Scope::eStruct) {
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const Token *funcStart = 0;
const Token *argStart = 0;
// What section are we in..
if (tok->str() == "private:")
access[scope] = Private;
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else if (tok->str() == "protected:")
access[scope] = Protected;
else if (tok->str() == "public:" || tok->str() == "__published:")
access[scope] = Public;
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else if (Token::Match(tok, "public|protected|private %var% :")) {
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if (tok->str() == "private")
access[scope] = Private;
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else if (tok->str() == "protected")
access[scope] = Protected;
else
access[scope] = Public;
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tok = tok->tokAt(2);
}
// class function?
else if (tok->previous()->str() != "::" && isFunction(tok, scope, &funcStart, &argStart)) {
Function function;
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// save the function definition argument start '('
function.argDef = argStart;
// save the access type
function.access = access[scope];
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// save the function name location
function.tokenDef = funcStart;
// operator function
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if (function.tokenDef->str().find("operator") == 0) {
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function.isOperator = true;
// 'operator =' is special
if (function.tokenDef->str() == "operator=")
function.type = Function::eOperatorEqual;
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}
// class constructor/destructor
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else if (function.tokenDef->str() == scope->className) {
// destructor
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if (function.tokenDef->previous()->str() == "~")
function.type = Function::eDestructor;
// copy constructor
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else if ((Token::Match(function.tokenDef, "%var% ( const %var% & )") ||
Token::Match(function.tokenDef, "%var% ( const %var% & %var% )")) &&
function.tokenDef->strAt(3) == scope->className)
function.type = Function::eCopyConstructor;
// copy constructor with non-const argument
else if ((Token::Match(function.tokenDef, "%var% ( %var% & )") ||
Token::Match(function.tokenDef, "%var% ( %var% & %var% )")) &&
function.tokenDef->strAt(2) == scope->className)
function.type = Function::eCopyConstructor;
// regular constructor
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else
function.type = Function::eConstructor;
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if (function.tokenDef->previous()->str() == "explicit")
function.isExplicit = true;
}
// function returning function pointer
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else if (tok->str() == "(") {
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function.retFuncPtr = true;
}
const Token *tok1 = tok;
// look for end of previous statement
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while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:")) {
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// virtual function
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if (tok1->previous()->str() == "virtual") {
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function.isVirtual = true;
break;
}
// static function
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else if (tok1->previous()->str() == "static") {
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function.isStatic = true;
break;
}
// friend function
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else if (tok1->previous()->str() == "friend") {
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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| = %any%"))
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function.isPure = true;
// count the number of constructors
if (function.type == Function::eConstructor ||
function.type == Function::eCopyConstructor)
scope->numConstructors++;
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// assume implementation is inline (definition and implementation same)
function.token = function.tokenDef;
function.arg = function.argDef;
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// out of line function
if (Token::Match(end, ") const| ;") ||
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Token::Match(end, ") const| = %any%")) {
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// find the function implementation later
tok = end->next();
scope->functionList.push_back(function);
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}
// inline function
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else {
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function.isInline = true;
function.hasBody = true;
// find start of function '{'
while (end && end->str() != "{")
end = end->next();
if (!end)
continue;
// save start of function
function.start = end;
scope->functionList.push_back(function);
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const Token *tok2 = funcStart;
Scope *functionOf = scope;
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addNewFunction(&scope, &tok2);
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if (scope) {
scope->functionOf = functionOf;
scope->function = &functionOf->functionList.back();
scope->function->functionScope = scope;
}
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tok = tok2;
}
}
// nested class or friend function?
else if (tok->previous()->str() == "::" && isFunction(tok, scope, &funcStart, &argStart)) {
/** @todo check entire qualification for match */
Scope * nested = scope->findInNestedListRecursive(tok->strAt(-2));
if (nested)
addClassFunction(&scope, &tok, argStart);
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else {
/** @todo handle friend functions */
}
}
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// friend class declaration?
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else if (Token::Match(tok, "friend class| %any% ;")) {
Scope::FriendInfo friendInfo;
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friendInfo.name = tok->strAt(1) == "class" ? tok->strAt(2) : tok->strAt(1);
// fill this in after parsing is complete
friendInfo.scope = 0;
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scope->friendList.push_back(friendInfo);
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}
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} else if (scope->type == Scope::eNamespace || scope->type == Scope::eGlobal) {
const Token *funcStart = 0;
const Token *argStart = 0;
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// function?
if (isFunction(tok, scope, &funcStart, &argStart)) {
// has body?
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if (Token::Match(argStart->link(), ") const| {|:")) {
Scope *old_scope = scope;
// class function
if (tok->previous() && tok->previous()->str() == "::")
addClassFunction(&scope, &tok, argStart);
// class destructor
else if (tok->previous() && tok->previous()->str() == "~" &&
tok->tokAt(-2) && tok->strAt(-2) == "::")
addClassFunction(&scope, &tok, argStart);
// regular function
else
addGlobalFunction(scope, tok, argStart, funcStart);
// syntax error
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if (!scope) {
scope = old_scope;
break;
}
}
// function returning function pointer with body
else if (Token::simpleMatch(argStart->link(), ") ) (") &&
Token::Match(argStart->link()->linkAt(2), ") const| {")) {
tok = funcStart;
Scope *old_scope = scope;
// class function
if (tok->previous()->str() == "::")
addClassFunction(&scope, &tok, argStart);
// regular function
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else {
Function* function = addGlobalFunction(scope, tok, argStart, funcStart);
function->retFuncPtr = true;
}
// syntax error?
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if (!scope) {
scope = old_scope;
break;
}
}
// function prototype
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else if (Token::simpleMatch(argStart->link(), ") ;")) {
bool newFunc = true; // Is this function already in the database?
for (std::list<Function>::const_iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef, argStart, "", 0))
newFunc = false;
}
// save function prototype in database
if (newFunc)
addGlobalFunctionDecl(scope, tok, argStart, funcStart);
tok = argStart->link()->next();
continue;
}
// function returning function pointer prototype
else if (Token::simpleMatch(argStart->link(), ") ) (") &&
Token::simpleMatch(argStart->link()->linkAt(2), ") ;")) {
bool newFunc = true; // Is this function already in the database?
for (std::list<Function>::const_iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef, argStart, "", 0))
newFunc = false;
}
// save function prototype in database
if (newFunc) {
Function* func = addGlobalFunctionDecl(scope, tok, argStart, funcStart);
func->retFuncPtr = true;
}
tok = argStart->link()->linkAt(2)->next();
continue;
}
}
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} else if (scope->type == Scope::eFunction || scope->isLocal()) {
if (Token::simpleMatch(tok, "if (") &&
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Token::simpleMatch(tok->next()->link(), ") {")) {
const Token *tok1 = tok->next()->link()->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eIf, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else if (Token::simpleMatch(tok, "else {")) {
const Token *tok1 = tok->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eElse, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else if (Token::simpleMatch(tok, "else if (") &&
Token::simpleMatch(tok->linkAt(2), ") {")) {
const Token *tok1 = tok->linkAt(2)->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eElseIf, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else if (Token::simpleMatch(tok, "for (") &&
Token::simpleMatch(tok->next()->link(), ") {")) {
// save location of initialization
const Token *tok1 = tok->next()->link()->next();
const Token *tok2 = tok->tokAt(2);
scopeList.push_back(Scope(this, tok, scope, Scope::eFor, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
// check for variable declaration and add it to new scope if found
scope->checkVariable(tok2, Local);
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} else if (Token::simpleMatch(tok, "while (") &&
Token::simpleMatch(tok->next()->link(), ") {")) {
const Token *tok1 = tok->next()->link()->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eWhile, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else if (Token::simpleMatch(tok, "do {")) {
const Token *tok1 = tok->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eDo, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else if (Token::simpleMatch(tok, "switch (") &&
Token::simpleMatch(tok->next()->link(), ") {")) {
const Token *tok1 = tok->next()->link()->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eSwitch, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
} else if (Token::simpleMatch(tok, "try {")) {
const Token *tok1 = tok->next();
scopeList.push_back(Scope(this, tok, scope, Scope::eTry, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
} else if (Token::simpleMatch(tok, "catch (") &&
Token::simpleMatch(tok->next()->link(), ") {")) {
const Token *tok1 = tok->next()->link()->next();
const Token *tok2 = tok->tokAt(2);
scopeList.push_back(Scope(this, tok, scope, Scope::eCatch, tok1));
tok = tok1;
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
// check for variable declaration and add it to new scope if found
scope->checkVariable(tok2, Throw);
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} else if (tok->str() == "{") {
if (!Token::Match(tok->previous(), "=|,")) {
scopeList.push_back(Scope(this, tok, scope, Scope::eUnconditional, tok));
scope = &scopeList.back();
scope->nestedIn->nestedList.push_back(scope);
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} else {
tok = tok->link();
}
}
}
}
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}
std::list<Scope>::iterator it;
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// fill in base class info
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for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
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// skip namespaces and functions
if (!scope->isClassOrStruct())
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continue;
// finish filling in base class info
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for (unsigned int i = 0; i < scope->derivedFrom.size(); ++i) {
std::list<Scope>::const_iterator it1;
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// check all scopes for match
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for (it1 = scopeList.begin(); it1 != scopeList.end(); ++it1) {
// check scope for match
const Scope *scope1 = it1->findQualifiedScope(scope->derivedFrom[i].name);
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// found match?
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if (scope1) {
// set found scope
scope->derivedFrom[i].scope = const_cast<Scope *>(scope1);
break;
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}
}
}
}
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// fill in friend info
for (it = scopeList.begin(); it != scopeList.end(); ++it) {
for (std::list<Scope::FriendInfo>::iterator i = it->friendList.begin(); i != it->friendList.end(); ++i) {
for (std::list<Scope>::iterator j = scopeList.begin(); j != scopeList.end(); ++j) {
// check scope for match
scope = const_cast<Scope*>(j->findQualifiedScope(i->name));
// found match?
if (scope && scope->isClassOrStruct()) {
// set found scope
i->scope = scope;
break;
}
}
}
}
// fill in variable info
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for (it = scopeList.begin(); it != scopeList.end(); ++it) {
// find variables
it->getVariableList();
}
// fill in function arguments
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for (it = scopeList.begin(); it != scopeList.end(); ++it) {
std::list<Function>::iterator func;
for (func = it->functionList.begin(); func != it->functionList.end(); ++func) {
// add arguments
func->addArguments(this, scope);
}
}
// 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
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do {
unknowns = 0;
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for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
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if (scope->isClassOrStruct() && scope->needInitialization == Scope::Unknown) {
// check for default constructor
bool hasDefaultConstructor = false;
std::list<Function>::const_iterator func;
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for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
if (func->type == Function::eConstructor) {
// check for no arguments: func ( )
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if (func->argCount() == 0) {
hasDefaultConstructor = true;
break;
}
/** check for arguments with default values */
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else if (func->argCount() == func->initializedArgCount()) {
hasDefaultConstructor = true;
break;
}
}
}
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// User defined types with user defined default 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)
scope->needInitialization = Scope::False;
// check each member variable to see if it needs initialization
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else {
bool needInitialization = false;
bool unknown = false;
std::list<Variable>::const_iterator var;
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for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
if (var->isClass()) {
if (var->type()) {
// does this type need initialization?
if (var->type()->needInitialization == Scope::True)
needInitialization = true;
else if (var->type()->needInitialization == Scope::Unknown)
unknown = true;
}
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} else
needInitialization = true;
}
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if (!unknown) {
if (needInitialization)
scope->needInitialization = Scope::True;
else
scope->needInitialization = Scope::False;
}
if (scope->needInitialization == Scope::Unknown)
unknowns++;
}
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} else if (scope->type == Scope::eUnion && scope->needInitialization == Scope::Unknown)
scope->needInitialization = Scope::True;
}
retry++;
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} while (unknowns && retry < 100);
// this shouldn't happen so output a debug warning
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if (retry == 100 && _settings->debugwarnings) {
for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
if (scope->isClassOrStruct() && scope->needInitialization == Scope::Unknown)
debugMessage(scope->classDef, "SymbolDatabase::SymbolDatabase couldn't resolve all user defined types.");
}
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}
// create variable symbol table
_variableList.resize(_tokenizer->varIdCount() + 1);
std::fill_n(_variableList.begin(), _variableList.size(), (const Variable*)NULL);
// check all scopes for variables
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for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
// add all variables
std::list<Variable>::const_iterator var;
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for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
unsigned int varId = var->varId();
if (varId)
_variableList[varId] = &(*var);
}
// add all function paramaters
std::list<Function>::const_iterator func;
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for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
// ignore function without implementations
if (!func->hasBody)
continue;
std::list<Variable>::const_iterator arg;
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for (arg = func->argumentList.begin(); arg != func->argumentList.end(); ++arg) {
// check for named parameters
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if (arg->nameToken() && arg->varId()) {
unsigned int varId = arg->varId();
if (varId)
_variableList[varId] = &(*arg);
}
}
}
}
/* set all unknown array dimensions that are set by a variable to the maximum size of that variable type */
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for (size_t i = 1; i <= _tokenizer->varIdCount(); i++) {
// check each array variable
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if (_variableList[i] && _variableList[i]->isArray()) {
// check each array dimension
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for (size_t j = 0; j < _variableList[i]->dimensions().size(); j++) {
// check for a single token dimension that is a variable
if (_variableList[i]->dimensions()[j].start &&
(_variableList[i]->dimensions()[j].start == _variableList[i]->dimensions()[j].end) &&
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_variableList[i]->dimensions()[j].start->varId()) {
Dimension &dimension = const_cast<Dimension &>(_variableList[i]->dimensions()[j]);
// get maximum size from type
// find where this type is defined
const Variable *var = getVariableFromVarId(dimension.start->varId());
// make sure it is in the database
if (!var)
break;
// get type token
const Token *index_type = var->typeEndToken();
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if (index_type->str() == "char") {
if (index_type->isUnsigned())
dimension.num = UCHAR_MAX + 1;
else if (index_type->isSigned())
dimension.num = SCHAR_MAX + 1;
else
dimension.num = CHAR_MAX + 1;
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} else if (index_type->str() == "short") {
if (index_type->isUnsigned())
dimension.num = USHRT_MAX + 1;
else
dimension.num = SHRT_MAX + 1;
}
// checkScope assumes size is signed int so we limit the following sizes to INT_MAX
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else if (index_type->str() == "int") {
if (index_type->isUnsigned())
dimension.num = UINT_MAX + 1ULL;
else
dimension.num = INT_MAX + 1ULL;
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} else if (index_type->str() == "long") {
if (index_type->isUnsigned()) {
if (index_type->isLong())
dimension.num = ULLONG_MAX; // should be ULLONG_MAX + 1ULL
else
dimension.num = ULONG_MAX; // should be ULONG_MAX + 1ULL
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} else {
if (index_type->isLong())
dimension.num = LLONG_MAX; // should be LLONG_MAX + 1LL
else
dimension.num = LONG_MAX; // should be LONG_MAX + 1LL
}
}
}
}
}
}
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}
bool SymbolDatabase::isFunction(const Token *tok, const Scope* outerScope, const Token **funcStart, const Token **argStart) const
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{
// function returning function pointer? '... ( ... %var% ( ... ))( ... ) {'
if (tok->str() == "(" &&
tok->link()->previous()->str() == ")" &&
tok->link()->next() &&
tok->link()->next()->str() == "(" &&
tok->link()->next()->link()->next() &&
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Token::Match(tok->link()->next()->link()->next(), "{|;|const|=")) {
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*funcStart = tok->link()->previous()->link()->previous();
*argStart = tok->link()->previous()->link();
return true;
}
// regular function?
else if (Token::Match(tok, "%var% (") && tok->previous() &&
(tok->previous()->isName() || tok->previous()->str() == "&" || tok->previous()->str() == "*" || // Either a return type in front of tok
tok->previous()->str() == "::" || tok->previous()->str() == "~" || // or a scope qualifier in front of tok
outerScope->isClassOrStruct()) && // or a ctor/dtor
(Token::Match(tok->next()->link(), ") const| ;|{|=") ||
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Token::Match(tok->next()->link(), ") : %var% (|::"))) {
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*funcStart = tok;
*argStart = tok->next();
return true;
}
return false;
}
void Variable::evaluate()
{
const Token* tok = _start;
while (tok && tok->previous() && tok->previous()->isName())
tok = tok->previous();
for (const Token* const end = _name?_name:_end; tok != end;) {
if (tok->str() == "static")
setFlag(fIsStatic, true);
else if (tok->str() == "mutable")
setFlag(fIsMutable, true);
else if (tok->str() == "const")
setFlag(fIsConst, true);
else if (tok->str() == "*") {
setFlag(fIsPointer, true);
setFlag(fIsConst, false); // Points to const, isn't necessarily const itself
} else if (tok->str() == "&")
setFlag(fIsReference, true);
if (tok->str() == "<")
tok->findClosingBracket(tok);
else
tok = tok->next();
}
if (_name)
setFlag(fIsArray, arrayDimensions(_dimensions, _name->next()));
if (_start)
setFlag(fIsClass, !_start->isStandardType() && !isPointer() && !isReference());
if (_access == Argument && _name) {
const Token* tok = _name->next();
while (tok->str() == "[")
tok = tok->link();
setFlag(fHasDefault, tok->str() == "=");
}
}
bool Function::argsMatch(const Scope *scope, const Token *first, const Token *second, const std::string &path, unsigned int depth)
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{
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while (first->str() == second->str()) {
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// at end of argument list
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if (first->str() == ")") {
return true;
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}
// skip default value assignment
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else if (first->next()->str() == "=") {
first = first->nextArgument();
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if (second->next()->str() == "=") {
second = second->nextArgument();
if (!first || !second) { // End of argument list (first or second)
return !first && !second;
}
} else if (!first) { // End of argument list (first)
return second->next() && second->next()->str() == ")";
}
}
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// 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% ,|)")) &&
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(first->next()->str() != second->next()->str())) {
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// skip variable names
first = first->next();
second = second->next();
}
// variable with class path
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else if (depth && Token::Match(first->next(), "%var%")) {
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std::string param = path + first->next()->str();
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if (Token::Match(second->next(), param.c_str())) {
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second = second->tokAt(int(depth) * 2);
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} else if (depth > 1) {
std::string short_path = path;
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// 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();
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if (Token::Match(second->next(), param.c_str())) {
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second = second->tokAt((int(depth) - 1) * 2);
}
}
}
// nested class variable
else if (depth == 0 && Token::Match(first->next(), "%var%") &&
second->next()->str() == scope->className && second->strAt(2) == "::" &&
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first->next()->str() == second->strAt(3)) {
second = second->tokAt(2);
}
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first = first->next();
second = second->next();
}
return false;
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}
Function* SymbolDatabase::addGlobalFunction(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart)
{
Function* function = 0;
for (std::list<Function>::iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef, argStart, "", 0))
function = &*i;
}
if (!function)
function = addGlobalFunctionDecl(scope, tok, argStart, funcStart);
function->arg = argStart;
function->token = funcStart;
function->hasBody = true;
addNewFunction(&scope, &tok);
if (scope) {
scope->function = function;
function->functionScope = scope;
return function;
}
return 0;
}
Function* SymbolDatabase::addGlobalFunctionDecl(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart)
{
Function 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.isInline = false;
function.hasBody = false;
function.type = Function::eFunction;
// find start of function '{'
const Token *start = tok;
while (start && start->str() != "{")
start = start->next();
// save start of function
function.start = start;
scope->functionList.push_back(function);
return &scope->functionList.back();
}
void SymbolDatabase::addClassFunction(Scope **scope, const Token **tok, const Token *argStart)
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{
int count = 0;
std::string path;
unsigned int path_length = 0;
const Token *tok1;
const bool destructor((*tok)->previous()->str() == "~");
// skip class/struct name
if (destructor)
tok1 = (*tok)->tokAt(-3);
else
tok1 = (*tok)->tokAt(-2);
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// syntax error?
if (!tok1)
return;
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// back up to head of path
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while (tok1 && tok1->previous() && tok1->previous()->str() == "::") {
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path = tok1->str() + " :: " + path;
tok1 = tok1->tokAt(-2);
count++;
path_length++;
}
if (tok1 && count) {
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path = tok1->str() + " :: " + path;
path_length++;
}
std::list<Scope>::iterator it1;
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// search for match
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for (it1 = scopeList.begin(); it1 != scopeList.end(); ++it1) {
Scope *scope1 = &(*it1);
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bool match = false;
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if (scope1->className == tok1->str() && (scope1->type != Scope::eFunction)) {
// do the scopes match (same scope) or do their names match (multiple namespaces)
if ((*scope == scope1->nestedIn) || (*scope && scope1 &&
(*scope)->className == scope1->nestedIn->className &&
!(*scope)->className.empty() &&
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(*scope)->type == scope1->nestedIn->type)) {
// nested scopes => check that they match
{
const Scope *s1 = *scope;
const Scope *s2 = scope1->nestedIn;
while (s1 && s2) {
if (s1->className != s2->className)
break;
s1 = s1->nestedIn;
s2 = s2->nestedIn;
}
// Not matching scopes
if (s1 || s2)
continue;
}
Scope *scope2 = scope1;
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while (scope2 && count > 0) {
count--;
tok1 = tok1->tokAt(2);
scope2 = scope2->findInNestedList(tok1->str());
}
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if (count == 0 && scope2) {
match = true;
scope1 = scope2;
}
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}
}
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if (match) {
std::list<Function>::iterator func;
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for (func = scope1->functionList.begin(); func != scope1->functionList.end(); ++func) {
if (!func->hasBody && func->tokenDef->str() == (*tok)->str()) {
if (func->type == Function::eDestructor && destructor) {
if (Function::argsMatch(scope1, func->tokenDef->next(), (*tok)->next(), path, path_length)) {
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
const Token *start = argStart->link()->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
}
} else if (func->type != Function::eDestructor && !destructor) {
if (Function::argsMatch(scope1, func->tokenDef->next(), (*tok)->next(), path, path_length)) {
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// normal function?
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if (!func->retFuncPtr && (*tok)->next()->link()) {
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if ((func->isConst && (*tok)->next()->link()->next()->str() == "const") ||
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(!func->isConst && (*tok)->next()->link()->next()->str() != "const")) {
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func->hasBody = true;
func->token = *tok;
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func->arg = argStart;
const Token *start = argStart->link()->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
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}
}
// function returning function pointer?
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else if (func->retFuncPtr) {
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// todo check for const
func->hasBody = true;
func->token = *tok;
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func->arg = argStart;
const Token *start = argStart->link()->linkAt(2)->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
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}
}
}
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if (func->hasBody) {
addNewFunction(scope, tok);
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if (*scope) {
(*scope)->functionOf = scope1;
(*scope)->function = &*func;
(*scope)->function->functionScope = *scope;
}
return;
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}
}
}
}
}
// class function of unknown class
addNewFunction(scope, tok);
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}
void SymbolDatabase::addNewFunction(Scope **scope, const Token **tok)
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{
const Token *tok1 = *tok;
scopeList.push_back(Scope(this, tok1, *scope));
Scope *new_scope = &scopeList.back();
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// skip to start of function
while (tok1 && tok1->str() != "{")
tok1 = tok1->next();
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if (tok1) {
new_scope->classStart = tok1;
new_scope->classEnd = tok1->link();
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// syntax error?
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if (!new_scope->classEnd) {
scopeList.pop_back();
while (tok1->next())
tok1 = tok1->next();
*scope = NULL;
*tok = tok1;
return;
}
*scope = new_scope;
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*tok = tok1;
(*scope)->nestedIn->nestedList.push_back(*scope);
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} else {
scopeList.pop_back();
*scope = NULL;
*tok = NULL;
}
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}
const Token *Scope::initBaseInfo(const Token *tok)
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{
// goto initial '{'
const Token *tok2 = tok->tokAt(2);
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while (tok2 && tok2->str() != "{") {
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// skip unsupported templates
if (tok2->str() == "<")
tok2->findClosingBracket(tok2);
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// check for base classes
else if (Token::Match(tok2, ":|,")) {
Scope::BaseInfo base;
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base.isVirtual = false;
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tok2 = tok2->next();
// check for invalid code
if (!tok2 || !tok2->next())
return NULL;
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if (tok2->str() == "virtual") {
base.isVirtual = true;
tok2 = tok2->next();
}
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if (tok2->str() == "public") {
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base.access = Public;
tok2 = tok2->next();
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} else if (tok2->str() == "protected") {
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base.access = Protected;
tok2 = tok2->next();
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} else if (tok2->str() == "private") {
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base.access = Private;
tok2 = tok2->next();
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} else {
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if (tok->str() == "class")
base.access = Private;
else if (tok->str() == "struct")
base.access = Public;
}
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if (tok2->str() == "virtual") {
base.isVirtual = true;
tok2 = tok2->next();
}
// handle global namespace
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if (tok2->str() == "::") {
base.name = ":: ";
tok2 = tok2->next();
}
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// handle derived base classes
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while (Token::Match(tok2, "%var% ::")) {
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base.name += tok2->str();
base.name += " :: ";
tok2 = tok2->tokAt(2);
}
base.name += tok2->str();
base.scope = NULL;
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// add unhandled templates
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if (tok2->next() && tok2->next()->str() == "<") {
tok2 = tok2->next();
base.name += tok2->str();
int level1 = 1;
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while (tok2->next()) {
base.name += tok2->next()->str();
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if (tok2->next()->str() == ">") {
level1--;
if (level1 == 0)
break;
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} else if (tok2->next()->str() == "<")
level1++;
tok2 = tok2->next();
}
}
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// save pattern for base class name
derivedFrom.push_back(base);
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}
tok2 = tok2->next();
}
return tok2;
}
void SymbolDatabase::debugMessage(const Token *tok, const std::string &msg) const
{
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if (tok && _settings->debugwarnings) {
const std::list<const Token*> locationList(1, tok);
const ErrorLogger::ErrorMessage errmsg(locationList, &_tokenizer->list,
Severity::debug,
msg,
"debug",
false);
if (_errorLogger)
_errorLogger->reportErr(errmsg);
}
}
bool Variable::arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok)
{
bool isArray = false;
const Token *dim = tok;
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while (dim && dim->next() && dim->str() == "[") {
Dimension dimension;
// check for empty array dimension []
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if (dim->next()->str() != "]") {
dimension.start = dim->next();
dimension.end = dim->link()->previous();
if (dimension.start == dimension.end && dimension.start->isNumber())
dimension.num = MathLib::toLongNumber(dimension.start->str());
}
dimensions.push_back(dimension);
dim = dim->link()->next();
isArray = true;
}
return isArray;
}
static std::ostream & operator << (std::ostream & s, Scope::ScopeType type)
{
s << (type == Scope::eGlobal ? "Global" :
type == Scope::eClass ? "Class" :
type == Scope::eStruct ? "Struct" :
type == Scope::eUnion ? "Union" :
type == Scope::eNamespace ? "Namespace" :
type == Scope::eFunction ? "Function" :
type == Scope::eIf ? "If" :
type == Scope::eElse ? "Else" :
type == Scope::eElseIf ? "ElseIf" :
type == Scope::eFor ? "For" :
type == Scope::eWhile ? "While" :
type == Scope::eDo ? "Do" :
type == Scope::eSwitch ? "Switch" :
type == Scope::eTry ? "Try" :
type == Scope::eCatch ? "Catch" :
type == Scope::eUnconditional ? "Unconditional" :
"Unknown");
return s;
}
void SymbolDatabase::printVariable(const Variable *var, const char *indent) const
{
std::cout << indent << "_name: " << var->nameToken();
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if (var->nameToken()) {
std::cout << " " << var->name() << " " << _tokenizer->list.fileLine(var->nameToken()) << std::endl;
std::cout << indent << " varId: " << var->varId() << std::endl;
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} else
std::cout << std::endl;
std::cout << indent << "_start: " << var->typeStartToken() << " " << var->typeStartToken()->str()
<< " " << _tokenizer->list.fileLine(var->typeStartToken()) << std::endl;;
std::cout << indent << "_end: " << var->typeEndToken() << " " << var->typeEndToken()->str()
<< " " << _tokenizer->list.fileLine(var->typeEndToken()) << std::endl;;
std::cout << indent << "_index: " << var->index() << std::endl;
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std::cout << indent << "_access: " <<
(var->isPublic() ? "Public" :
var->isProtected() ? "Protected" :
var->isPrivate() ? "Private" :
var->isGlobal() ? "Global" :
var->isNamespace() ? "Namespace" :
var->isArgument() ? "Argument" :
var->isLocal() ? "Local" :
var->isThrow() ? "Throw" :
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"???") << std::endl;
std::cout << indent << "_flags: " << std::endl;
std::cout << indent << " isMutable: " << (var->isMutable() ? "true" : "false") << std::endl;
std::cout << indent << " isStatic: " << (var->isStatic() ? "true" : "false") << std::endl;
std::cout << indent << " isConst: " << (var->isConst() ? "true" : "false") << std::endl;
std::cout << indent << " isClass: " << (var->isClass() ? "true" : "false") << std::endl;
std::cout << indent << " isArray: " << (var->isArray() ? "true" : "false") << std::endl;
std::cout << indent << " isPointer: " << (var->isPointer() ? "true" : "false") << std::endl;
std::cout << indent << " isReference: " << (var->isReference() ? "true" : "false") << std::endl;
std::cout << indent << " hasDefault: " << (var->hasDefault() ? "true" : "false") << std::endl;
std::cout << indent << "_type: ";
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if (var->type()) {
std::cout << var->type()->className << " " << var->type()->type << " "
<< _tokenizer->list.fileLine(var->type()->classDef) << std::endl;
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} else
std::cout << "none" << std::endl;
std::cout << indent << "_scope: ";
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if (var->scope()) {
std::cout << var->scope()->className << " " << var->scope()->type;
if (var->scope()->classDef)
std::cout << " " << _tokenizer->list.fileLine(var->scope()->classDef) << std::endl;
else
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std::cout << std::endl;
} else
std::cout << "none" << std::endl;
std::cout << indent << "_dimensions:";
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for (size_t i = 0; i < var->dimensions().size(); i++) {
std::cout << " " << var->dimension(i);
}
std::cout << std::endl;
}
void SymbolDatabase::printOut(const char *title) const
{
if (title)
std::cout << "\n### " << title << " ###\n";
std::list<Scope>::const_iterator scope;
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for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
std::cout << "Scope: " << &*scope << std::endl;
std::cout << " type: " << scope->type << std::endl;
std::cout << " className: " << scope->className << std::endl;
std::cout << " classDef: " << scope->classDef;
if (scope->classDef)
std::cout << " " << scope->classDef->str() << " " << _tokenizer->list.fileLine(scope->classDef) << std::endl;
else
std::cout << std::endl;
std::cout << " classStart: " << scope->classStart;
if (scope->classStart)
std::cout << " " << scope->classStart->str() << " " << _tokenizer->list.fileLine(scope->classStart) << std::endl;
else
std::cout << std::endl;
std::cout << " classEnd: " << scope->classEnd;
if (scope->classEnd)
std::cout << " " << scope->classEnd->str() << " " << _tokenizer->list.fileLine(scope->classEnd) << std::endl;
else
std::cout << std::endl;
std::list<Function>::const_iterator func;
// find the function body if not implemented inline
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for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
std::cout << " Function: " << &*func << std::endl;
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std::cout << " name: " << func->tokenDef->str() << " "
<< _tokenizer->list.fileLine(func->tokenDef) << std::endl;
std::cout << " type: " << (func->type == Function::eConstructor? "Constructor" :
func->type == Function::eCopyConstructor ? "CopyConstructor" :
func->type == Function::eOperatorEqual ? "OperatorEqual" :
func->type == Function::eDestructor ? "Destructor" :
func->type == Function::eFunction ? "Function" :
"???") << std::endl;
std::cout << " access: " << (func->access == Public ? "Public" :
func->access == Protected ? "Protected" :
func->access == Private ? "Private" :
"???") << std::endl;
std::cout << " hasBody: " << (func->hasBody ? "true" : "false") << std::endl;
std::cout << " isInline: " << (func->isInline ? "true" : "false") << std::endl;
std::cout << " isConst: " << (func->isConst ? "true" : "false") << std::endl;
std::cout << " isVirtual: " << (func->isVirtual ? "true" : "false") << std::endl;
std::cout << " isPure: " << (func->isPure ? "true" : "false") << std::endl;
std::cout << " isStatic: " << (func->isStatic ? "true" : "false") << std::endl;
std::cout << " isFriend: " << (func->isFriend ? "true" : "false") << std::endl;
std::cout << " isExplicit: " << (func->isExplicit ? "true" : "false") << std::endl;
std::cout << " isOperator: " << (func->isOperator ? "true" : "false") << std::endl;
std::cout << " retFuncPtr: " << (func->retFuncPtr ? "true" : "false") << std::endl;
std::cout << " tokenDef: " << _tokenizer->list.fileLine(func->tokenDef) << std::endl;
std::cout << " argDef: " << _tokenizer->list.fileLine(func->argDef) << std::endl;
if (func->hasBody) {
std::cout << " token: " << _tokenizer->list.fileLine(func->token) << std::endl;
std::cout << " arg: " << _tokenizer->list.fileLine(func->arg) << std::endl;
}
std::cout << " functionScope: ";
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if (func->functionScope) {
std::cout << func->functionScope->className << " "
<< _tokenizer->list.fileLine(func->functionScope->classDef) << std::endl;
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} else
std::cout << "Unknown" << std::endl;
std::list<Variable>::const_iterator var;
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for (var = func->argumentList.begin(); var != func->argumentList.end(); ++var) {
std::cout << " Variable: " << &*var << std::endl;
printVariable(&*var, " ");
}
}
std::list<Variable>::const_iterator var;
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for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
std::cout << " Variable: " << &*var << std::endl;
printVariable(&*var, " ");
}
std::cout << " derivedFrom[" << scope->derivedFrom.size() << "] = (";
size_t count = scope->derivedFrom.size();
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for (size_t i = 0; i < scope->derivedFrom.size(); ++i) {
if (scope->derivedFrom[i].isVirtual)
std::cout << "Virtual ";
std::cout << (scope->derivedFrom[i].access == Public ? " Public " :
scope->derivedFrom[i].access == Protected ? " Protected " :
scope->derivedFrom[i].access == Private ? " Private " :
" Unknown");
if (scope->derivedFrom[i].scope)
std::cout << scope->derivedFrom[i].scope->type;
else
std::cout << " Unknown";
std::cout << " " << scope->derivedFrom[i].name;
if (count-- > 1)
std::cout << ",";
}
std::cout << " )" << std::endl;
std::cout << " nestedIn: " << scope->nestedIn;
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if (scope->nestedIn) {
std::cout << " " << scope->nestedIn->type << " "
<< scope->nestedIn->className;
}
std::cout << std::endl;
std::cout << " nestedList[" << scope->nestedList.size() << "] = (";
std::list<Scope *>::const_iterator nsi;
count = scope->nestedList.size();
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for (nsi = scope->nestedList.begin(); nsi != scope->nestedList.end(); ++nsi) {
std::cout << " " << &(*nsi) << " " << (*nsi)->type << " " << (*nsi)->className;
if (count-- > 1)
std::cout << ",";
}
std::cout << " )" << std::endl;
std::cout << " needInitialization: " << (scope->needInitialization == Scope::Unknown ? "Unknown" :
scope->needInitialization == Scope::True ? "True" :
scope->needInitialization == Scope::False ? "False" :
"Invalid") << std::endl;
std::list<const Token *>::const_iterator use;
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for (use = scope->usingList.begin(); use != scope->usingList.end(); ++use) {
std::cout << " using: " << (*use)->strAt(2);
const Token *tok1 = (*use)->tokAt(3);
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while (tok1 && tok1->str() == "::") {
std::cout << "::" << tok1->strAt(1);
tok1 = tok1->tokAt(2);
}
std::cout << " " << _tokenizer->list.fileLine(*use) << std::endl;
}
std::cout << " functionOf: " << scope->functionOf;
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if (scope->functionOf) {
std::cout << " " << scope->functionOf->type << " " << scope->functionOf->className;
if (scope->functionOf->classDef)
std::cout << " " << _tokenizer->list.fileLine(scope->functionOf->classDef);
}
std::cout << std::endl;
std::cout << " function: " << scope->function;
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if (scope->function) {
std::cout << " " << scope->function->tokenDef->str() << " "
<< _tokenizer->list.fileLine(scope->function->tokenDef);
}
std::cout << std::endl;
}
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for (size_t i = 0; i < _variableList.size(); i++) {
std::cout << "_variableList[" << i << "] = " << _variableList[i] << std::endl;
}
}
//---------------------------------------------------------------------------
unsigned int Function::initializedArgCount() const
{
unsigned int count = 0;
std::list<Variable>::const_iterator var;
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for (var = argumentList.begin(); var != argumentList.end(); ++var) {
if (var->hasDefault())
++count;
}
return count;
}
void Function::addArguments(const SymbolDatabase *symbolDatabase, const Scope *scope)
{
// check for non-empty argument list "( ... )"
if (arg && arg->link() != arg->next() && !Token::simpleMatch(arg, "( void )")) {
unsigned int count = 0;
for (const Token* tok = arg->next(); tok; tok = tok->next()) {
const Token* startTok = tok;
const Token* endTok = NULL;
const Token* nameTok = NULL;
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while (tok->str() != "," && tok->str() != ")" && tok->str() != "=") {
if (tok->varId() != 0) {
nameTok = tok;
endTok = tok->previous();
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} else if (tok->str() == "[") {
// skip array dimension(s)
tok = tok->link();
while (tok->next()->str() == "[")
tok = tok->next()->link();
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} else if (tok->str() == "<") {
bool success = tok->findClosingBracket(tok);
if (!tok || !success) // something is wrong so just bail out
return;
}
tok = tok->next();
if (!tok) // something is wrong so just bail
return;
}
const Token *typeTok = startTok->tokAt(startTok->str() == "const" ? 1 : 0);
if (typeTok->str() == "struct")
typeTok = typeTok->next();
// check for argument with no name or missing varid
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if (!endTok) {
if (tok->previous()->isName()) {
if (tok->previous() != typeTok) {
nameTok = tok->previous();
endTok = nameTok->previous();
if (hasBody)
symbolDatabase->debugMessage(nameTok, "Function::addArguments found argument \'" + nameTok->str() + "\' with varid 0.");
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} else
endTok = startTok;
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} else
endTok = tok->previous();
}
const Scope *argType = NULL;
if (!typeTok->isStandardType())
argType = symbolDatabase->findVariableType(scope, typeTok);
// skip default values
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if (tok->str() == "=") {
while (tok->str() != "," && tok->str() != ")")
tok = tok->next();
}
argumentList.push_back(Variable(nameTok, startTok, endTok, count++, Argument, argType, functionScope));
if (tok->str() == ")")
break;
}
}
}
bool Function::isImplicitlyVirtual(bool defaultVal) const
{
if (isVirtual)
return true;
else if (access == Private || access == Public || access == Protected) {
bool safe = true;
bool hasVirt = isImplicitlyVirtual_rec(functionScope->functionOf, safe);
if (hasVirt)
return true;
else if (safe)
return false;
else
return defaultVal;
} else
return false;
}
bool Function::isImplicitlyVirtual_rec(const Scope* scope, bool& safe) const
{
// check each base class
for (unsigned int i = 0; i < scope->derivedFrom.size(); ++i) {
// check if base class exists in database
if (scope->derivedFrom[i].scope) {
const Scope *parent = scope->derivedFrom[i].scope;
std::list<Function>::const_iterator func;
// check if function defined in base class
for (func = parent->functionList.begin(); func != parent->functionList.end(); ++func) {
if (func->isVirtual && func->tokenDef->str() == tokenDef->str()) { // Base is virtual and of same name
const Token *temp1 = func->tokenDef->previous();
const Token *temp2 = tokenDef->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(scope, func->argDef, argDef, "", 0)) {
return true;
}
}
}
if (!parent->derivedFrom.empty())
if (isImplicitlyVirtual_rec(parent, safe))
return true;
} else {
// unable to find base class so assume it has no virtual function
safe = false;
return false;
}
}
return false;
}
const Variable* Function::getArgumentVar(unsigned int num) const
{
for (std::list<Variable>::const_iterator i = argumentList.begin(); i != argumentList.end(); ++i) {
if (i->index() == num)
return(&*i);
else if (i->index() > num)
return 0;
}
return 0;
}
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//---------------------------------------------------------------------------
Scope::Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_, ScopeType type_, const Token *start_) :
check(check_),
classDef(classDef_),
classStart(start_),
classEnd(start_->link()),
nestedIn(nestedIn_),
numConstructors(0),
needInitialization(Scope::Unknown),
type(type_),
functionOf(NULL),
function(NULL)
{
}
Scope::Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_) :
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check(check_),
classDef(classDef_),
classStart(NULL),
classEnd(NULL),
nestedIn(nestedIn_),
numConstructors(0),
needInitialization(Scope::Unknown),
functionOf(NULL),
function(NULL)
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{
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if (!classDef) {
type = Scope::eGlobal;
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} else if (classDef->str() == "class") {
type = Scope::eClass;
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className = classDef->next()->str();
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} else if (classDef->str() == "struct") {
type = Scope::eStruct;
// anonymous and unnamed structs don't have a name
if (classDef->next()->str() != "{")
className = classDef->next()->str();
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} else if (classDef->str() == "union") {
type = Scope::eUnion;
// anonymous and unnamed unions don't have a name
if (classDef->next()->str() != "{")
className = classDef->next()->str();
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} else if (classDef->str() == "namespace") {
type = Scope::eNamespace;
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className = classDef->next()->str();
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} else {
type = Scope::eFunction;
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className = classDef->str();
}
}
bool Scope::hasDefaultConstructor() const
{
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if (numConstructors) {
std::list<Function>::const_iterator func;
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for (func = functionList.begin(); func != functionList.end(); ++func) {
if (func->type == Function::eConstructor && func->argCount() == 0)
return true;
}
}
return false;
}
AccessControl Scope::defaultAccess() const
{
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switch (type) {
case eGlobal:
return Global;
case eClass:
return Private;
case eStruct:
return Public;
case eUnion:
return Public;
case eNamespace:
return Namespace;
default:
return Local;
}
}
// Get variable list..
void Scope::getVariableList()
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{
AccessControl varaccess = defaultAccess();
const Token *start;
unsigned int level = 1;
if (classStart)
start = classStart->next();
else
start = check->_tokenizer->tokens();
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for (const Token *tok = start; tok; tok = tok->next()) {
// end of scope?
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if (tok->str() == "}") {
level--;
if (level == 0)
break;
}
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// syntax error?
else if (tok->next() == NULL)
break;
// Is it a function?
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else if (tok->str() == "{") {
tok = tok->link();
// syntax error?
if (!tok)
return;
continue;
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}
// Is it a nested class or structure?
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else if (Token::Match(tok, "class|struct|union|namespace %type% :|{")) {
tok = tok->tokAt(2);
while (tok && tok->str() != "{")
tok = tok->next();
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if (tok) {
// skip implementation
tok = tok->link();
continue;
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} else
break;
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} else if (Token::Match(tok, "struct|union {") && Token::Match(tok->next()->link(), "} %var% ;|[")) {
tok = tok->next()->link()->tokAt(2);
continue;
} else if (Token::Match(tok, "struct|union {") && Token::simpleMatch(tok->next()->link(), "} ;")) {
level++;
tok = tok->next();
continue;
}
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// Borland C++: Skip all variables in the __published section.
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// These are automatically initialized.
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else if (tok->str() == "__published:") {
for (; tok; tok = tok->next()) {
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if (tok->str() == "{")
tok = tok->link();
if (Token::Match(tok->next(), "private:|protected:|public:"))
break;
}
if (tok)
continue;
else
break;
}
// "private:" "public:" "protected:" etc
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else if (tok->str() == "public:") {
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varaccess = Public;
continue;
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} else if (tok->str() == "protected:") {
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varaccess = Protected;
continue;
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} else if (tok->str() == "private:") {
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varaccess = Private;
continue;
}
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// Is it a forward declaration?
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else if (Token::Match(tok, "class|struct|union %var% ;")) {
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tok = tok->tokAt(2);
continue;
}
// Borland C++: Ignore properties..
else if (tok->str() == "__property")
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continue;
// skip return and delete
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else if (Token::Match(tok, "return|delete")) {
while (tok->next() && tok->next()->str() != ";")
tok = tok->next();
continue;
}
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// Search for start of statement..
else if (tok->previous() && !Token::Match(tok->previous(), ";|{|}|public:|protected:|private:"))
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continue;
else if (Token::Match(tok, ";|{|}"))
continue;
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else if (Token::Match(tok, "goto %var% ;")) {
tok = tok->tokAt(2);
continue;
}
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tok = checkVariable(tok, varaccess);
if (!tok)
break;
}
}
const Token *Scope::checkVariable(const Token *tok, AccessControl varaccess)
{
// This is the start of a statement
const Token *vartok = NULL;
const Token *typetok = NULL;
// Is it a throw..?
if (Token::Match(tok, "throw %any% (") &&
Token::simpleMatch(tok->linkAt(2), ") ;")) {
return tok->linkAt(2);
} else if ((Token::Match(tok, "throw %any% :: %any% (") &&
Token::simpleMatch(tok->linkAt(4), ") ;"))) {
return tok->linkAt(4);
}
// Is it const..?
if (tok->str() == "const") {
tok = tok->next();
}
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// Is it a static variable?
if (tok->str() == "static") {
tok = tok->next();
}
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// Is it a mutable variable?
if (tok->str() == "mutable") {
tok = tok->next();
}
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// Is it const..?
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if (tok->str() == "const") {
tok = tok->next();
}
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// the start of the type tokens does not include the above modifiers
const Token *typestart = tok;
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if (Token::Match(tok, "struct|union")) {
tok = tok->next();
}
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if (tok && isVariableDeclaration(tok, vartok, typetok)) {
// If the vartok was set in the if-blocks above, create a entry for this variable..
tok = vartok->next();
while (tok && tok->str() == "[")
tok = tok->link()->next();
if (vartok->varId() == 0 && !vartok->isBoolean())
check->debugMessage(vartok, "Scope::checkVariable found variable \'" + vartok->str() + "\' with varid 0.");
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const Scope *scope = NULL;
if (typetok)
scope = check->findVariableType(this, typetok);
addVariable(vartok, typestart, vartok->previous(), varaccess, scope, this);
}
return tok;
}
const Variable *Scope::getVariable(const std::string &varname) const
{
std::list<Variable>::const_iterator iter;
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for (iter = varlist.begin(); iter != varlist.end(); ++iter) {
if (iter->name() == varname)
return &*iter;
}
return NULL;
}
static const Token* skipScopeIdentifiers(const Token* tok)
{
if (Token::simpleMatch(tok, "::")) {
tok = tok->next();
}
while (Token::Match(tok, "%type% ::")) {
tok = tok->tokAt(2);
}
return tok;
}
static const Token* skipPointers(const Token* tok)
{
while (Token::Match(tok, "*|&")) {
tok = tok->next();
}
return tok;
}
bool Scope::isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok) const
{
if (tok && tok->str() == "throw" && check->_tokenizer->isCPP())
return false;
const Token* localTypeTok = skipScopeIdentifiers(tok);
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const Token* localVarTok = NULL;
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if (Token::Match(localTypeTok, "%type% <")) {
const Token* closeTok = NULL;
bool found = localTypeTok->next()->findClosingBracket(closeTok);
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if (found) {
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localVarTok = skipPointers(closeTok->next());
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if (Token::Match(localVarTok, ":: %type% %var% ;|=")) {
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localTypeTok = localVarTok->next();
localVarTok = localVarTok->tokAt(2);
}
}
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} else if (Token::Match(localTypeTok, "%type%")) {
localVarTok = skipPointers(localTypeTok->strAt(1)=="const"?localTypeTok->tokAt(2):localTypeTok->next());
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}
if (localVarTok && localVarTok->str() == "const")
localVarTok = localVarTok->next();
if (Token::Match(localVarTok, "%var% ;|=")) {
vartok = localVarTok;
typetok = localTypeTok;
} else if (Token::Match(localVarTok, "%var% [") && localVarTok->str() != "operator") {
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vartok = localVarTok;
typetok = localTypeTok;
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} else if ((isLocal() || type == Scope::eFunction) &&
Token::Match(localVarTok, "%var% (") &&
Token::simpleMatch(localVarTok->next()->link(), ") ;")) {
vartok = localVarTok;
typetok = localTypeTok;
} else if (type == eCatch &&
(Token::Match(localTypeTok, "%var% )") ||
Token::Match(localTypeTok, "%var% &| %var% )"))) {
vartok = localVarTok;
typetok = localTypeTok;
}
return NULL != vartok;
}
//---------------------------------------------------------------------------
const Scope *SymbolDatabase::findVariableType(const Scope *start, const Token *type) const
{
std::list<Scope>::const_iterator scope;
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for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
// skip namespaces, functions, ...
if (scope->type != Scope::eClass && scope->type != Scope::eStruct && scope->type != Scope::eUnion)
continue;
// do the names match?
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if (scope->className == type->str()) {
// check if type does not have a namespace
if (type->previous() == NULL || type->previous()->str() != "::") {
const Scope *parent = start;
// check if in same namespace
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while (parent) {
// out of line class function belongs to class
if (parent->type == Scope::eFunction && parent->functionOf)
parent = parent->functionOf;
else if (parent != scope->nestedIn)
parent = parent->nestedIn;
else
break;
}
if (scope->nestedIn == parent)
return &(*scope);
}
// type has a namespace
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else {
// FIXME check if namespace path matches supplied path
return &(*scope);
}
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}
}
return NULL;
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}
//---------------------------------------------------------------------------
const Scope *SymbolDatabase::findFunctionScopeByToken(const Token *tok) const
{
std::list<Scope>::const_iterator scope;
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for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
if (scope->type == Scope::eFunction) {
if (scope->classDef == tok)
return &(*scope);
}
}
return 0;
}
//---------------------------------------------------------------------------
const Function *SymbolDatabase::findFunctionByToken(const Token *tok) const
{
std::list<Scope>::const_iterator scope;
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for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
std::list<Function>::const_iterator func;
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for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
if (func->token == tok)
return &(*func);
}
}
return 0;
}
//---------------------------------------------------------------------------
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const Scope* SymbolDatabase::findScopeByName(const std::string& name) const
{
for (std::list<Scope>::const_iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
if (it->className == name)
return &*it;
}
return 0;
}
//---------------------------------------------------------------------------
Scope * Scope::findInNestedList(const std::string & name)
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{
std::list<Scope *>::iterator it;
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for (it = nestedList.begin(); it != nestedList.end(); ++it) {
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if ((*it)->className == name)
return (*it);
}
return 0;
}
//---------------------------------------------------------------------------
Scope * Scope::findInNestedListRecursive(const std::string & name)
{
std::list<Scope *>::iterator it;
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for (it = nestedList.begin(); it != nestedList.end(); ++it) {
if ((*it)->className == name)
return (*it);
}
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for (it = nestedList.begin(); it != nestedList.end(); ++it) {
Scope *child = (*it)->findInNestedListRecursive(name);
if (child)
return child;
}
return 0;
}
//---------------------------------------------------------------------------
const Scope * Scope::findQualifiedScope(const std::string & name) const
{
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if (type == Scope::eClass || type == Scope::eStruct || type == Scope::eNamespace) {
if (name.compare(0, className.size(), className) == 0) {
std::string path = name;
path.erase(0, className.size());
if (path.compare(0, 4, " :: ") == 0)
path.erase(0, 4);
else if (path.empty())
return this;
std::list<Scope *>::const_iterator it;
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for (it = nestedList.begin() ; it != nestedList.end(); ++it) {
const Scope *scope1 = (*it)->findQualifiedScope(path);
if (scope1)
return scope1;
}
}
}
return 0;
}
//---------------------------------------------------------------------------
const Function *Scope::getDestructor() const
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{
std::list<Function>::const_iterator it;
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for (it = functionList.begin(); it != functionList.end(); ++it) {
if (it->type == Function::eDestructor)
return &(*it);
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}
return 0;
}
//---------------------------------------------------------------------------
unsigned int Scope::getNestedNonFunctions() const
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{
unsigned int nested = 0;
std::list<Scope *>::const_iterator ni;
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for (ni = nestedList.begin(); ni != nestedList.end(); ++ni) {
if ((*ni)->type != Scope::eFunction)
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nested++;
}
return nested;
}