2186 lines
73 KiB
C++
2186 lines
73 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2010 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//---------------------------------------------------------------------------
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#include "checkclass.h"
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#include "tokenize.h"
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#include "token.h"
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#include "errorlogger.h"
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#include <locale>
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#include <cstring>
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#include <string>
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#include <sstream>
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#include <algorithm>
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//---------------------------------------------------------------------------
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// Register CheckClass..
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namespace
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{
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CheckClass instance;
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}
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//---------------------------------------------------------------------------
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CheckClass::CheckClass(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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: Check(tokenizer, settings, errorLogger),
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hasSymbolDatabase(false)
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{
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}
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void CheckClass::createSymbolDatabase()
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{
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// Multiple calls => bail out
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if (hasSymbolDatabase)
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return;
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hasSymbolDatabase = true;
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// find all namespaces (class,struct and namespace)
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SpaceInfo *info = 0;
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for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next())
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{
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// Locate next class
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if (Token::Match(tok, "class|struct|namespace %var% [{:]"))
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{
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SpaceInfo *new_info = new SpaceInfo;
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new_info->isNamespace = tok->str() == "namespace";
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new_info->className = tok->next()->str();
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new_info->classDef = tok;
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// goto initial '{'
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const Token *tok2 = tok->tokAt(2);
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while (tok2 && tok2->str() != "{")
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{
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// check for base classes
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if (Token::Match(tok2, ":|, public|protected|private"))
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{
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// jump to base class name
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tok2 = tok2->tokAt(2);
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std::string derivedFrom;
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// handle derived base classes
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while (Token::Match(tok2, "%var% ::"))
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{
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derivedFrom += tok2->str();
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derivedFrom += " :: ";
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tok2 = tok2->tokAt(2);
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}
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derivedFrom += tok2->str();
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// save pattern for base class name
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new_info->derivedFrom.push_back(derivedFrom);
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}
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tok2 = tok2->next();
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}
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new_info->classStart = tok2;
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new_info->classEnd = new_info->classStart->link();
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new_info->numConstructors = 0;
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new_info->varlist = getVarList(tok);
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new_info->nest = info;
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new_info->access = tok->str() == "struct" ? Public : Private;
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info = new_info;
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// add namespace
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spaceInfoMMap.insert(std::make_pair(info->className, info));
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tok = tok2;
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}
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// check if in class
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else if (info && !info->isNamespace)
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{
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// check for end of class
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if (tok == info->classEnd)
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{
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info = info->nest;
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}
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else
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{
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// What section are we in..
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if (tok->str() == "private:")
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info->access = Private;
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else if (tok->str() == "protected:")
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info->access = Protected;
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else if (tok->str() == "public:")
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info->access = Public;
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// function?
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else if (((Token::Match(tok, "%var% (") || Token::Match(tok, "operator %any% (")) && tok->previous()->str() != "::") &&
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Token::Match(tok->str() == "operator" ? tok->tokAt(2)->link() : tok->next()->link(), ") const| ;|{|=|:"))
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{
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Func function;
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// save the access type
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function.access = info->access;
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// save the function name location
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function.tokenDef = tok;
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// operator function
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if (function.tokenDef->str() == "operator")
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{
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function.isOperator = true;
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// update the function name location
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function.tokenDef = function.tokenDef->next();
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// 'operator =' is special
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if (function.tokenDef->str() == "=")
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function.type = Func::OperatorEqual;
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}
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// class constructor/destructor
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else if (function.tokenDef->str() == info->className)
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{
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if (function.tokenDef->previous()->str() == "~")
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function.type = Func::Destructor;
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else if (Token::Match(function.tokenDef, "%var% ( const %var% & %var%| )") &&
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function.tokenDef->strAt(3) == info->className)
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function.type = Func::CopyConstructor;
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else
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function.type = Func::Constructor;
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}
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const Token *tok1 = tok;
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// look for end of previous statement
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while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:"))
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{
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// virtual function
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if (tok1->previous()->str() == "virtual")
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{
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function.isVirtual = true;
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break;
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}
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// static function
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else if (tok1->previous()->str() == "static")
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{
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function.isStatic = true;
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break;
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}
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// friend function
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else if (tok1->previous()->str() == "friend")
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{
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function.isFriend = true;
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break;
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}
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tok1 = tok1->previous();
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}
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// const function
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if (function.tokenDef->next()->link()->next()->str() == "const")
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function.isConst = true;
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// count the number of constructors
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if (function.type == Func::Constructor || function.type == Func::CopyConstructor)
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info->numConstructors++;
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// assume implementation is inline (definition and implementation same)
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function.token = function.tokenDef;
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// jump to end of args
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const Token *next = function.tokenDef->next()->link();
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// out of line function
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if (Token::Match(next, ") const| ;") ||
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Token::Match(next, ") const| = 0 ;"))
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{
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// find implementation using names on stack
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SpaceInfo * nest = info;
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unsigned int depth = 0;
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std::string classPattern;
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std::string classPath;
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std::string searchPattern;
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const Token *funcArgs = function.tokenDef->tokAt(2);
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if (function.isOperator)
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classPattern = "operator " + function.tokenDef->str() + " (";
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else
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classPattern = function.tokenDef->str() + " (";
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while (!function.hasBody && nest)
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{
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classPath = nest->className + std::string(" :: ") + classPath;
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searchPattern = classPath + classPattern;
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depth++;
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nest = nest->nest;
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// start looking at end of class
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SpaceInfo * top = info;
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const Token *found = top->classEnd;
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while ((found = Token::findmatch(found, searchPattern.c_str(), nest ? nest->classEnd : 0)) != NULL)
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{
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// skip other classes
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if (found->previous()->str() == "::")
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break;
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// goto function name
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while (found->next()->str() != "(")
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found = found->next();
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if (Token::Match(found->next()->link(), ") const| {"))
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{
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if (argsMatch(funcArgs, found->tokAt(2), classPath, depth))
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{
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function.token = found;
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function.hasBody = true;
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info->functionList.push_back(function);
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break;
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}
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// skip function body
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while (found->str() != "{")
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found = found->next();
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found = found->link();
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}
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}
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}
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if (!function.hasBody)
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info->functionList.push_back(function);
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tok = next->next();
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}
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// inline function
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else
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{
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function.isInline = true;
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function.hasBody = true;
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info->functionList.push_back(function);
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// skip over function body
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tok = next->next();
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while (tok->str() != "{")
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tok = tok->next();
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tok = tok->link();
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}
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}
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}
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}
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}
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}
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CheckClass::~CheckClass()
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{
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std::multimap<std::string, SpaceInfo *>::iterator it;
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for (it = spaceInfoMMap.begin(); it != spaceInfoMMap.end(); ++it)
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{
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SpaceInfo *info = it->second;
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// Delete the varlist..
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while (info->varlist)
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{
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Var *nextvar = info->varlist->next;
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delete info->varlist;
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info->varlist = nextvar;
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}
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delete info;
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}
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}
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//---------------------------------------------------------------------------
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CheckClass::Var *CheckClass::getVarList(const Token *tok1)
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{
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// Get variable list..
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Var *varlist = NULL;
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unsigned int indentlevel = 0;
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bool isStruct = tok1->str() == "struct";
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bool priv = !isStruct;
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for (const Token *tok = tok1; tok; tok = tok->next())
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{
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if (!tok->next())
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break;
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if (tok->str() == "{")
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++indentlevel;
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else if (tok->str() == "}")
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{
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if (indentlevel <= 1)
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break;
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--indentlevel;
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}
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if (indentlevel != 1)
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continue;
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// Borland C++: Skip all variables in the __published section.
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// These are automaticly initialized.
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if (tok->str() == "__published:")
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{
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priv = false;
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for (; tok; tok = tok->next())
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{
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if (tok->str() == "{")
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tok = tok->link();
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if (Token::Match(tok->next(), "private:|protected:|public:"))
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break;
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}
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if (tok)
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continue;
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else
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break;
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}
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// "private:" "public:" "protected:" etc
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const bool b((tok->str()[0] != ':') && tok->str().find(":") != std::string::npos);
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if (b)
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priv = bool(tok->str() == "private:");
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// Search for start of statement..
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if (! Token::Match(tok, "[;{}]") && ! b)
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continue;
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// This is the start of a statement
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const Token *next = tok->next();
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std::string varname;
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// If next token contains a ":".. it is not part of a variable declaration
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if (next->str().find(":") != std::string::npos)
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continue;
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// Borland C++: Ignore properties..
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if (next->str() == "__property")
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continue;
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// Is it const..?
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if (next->str() == "const")
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{
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next = next->next();
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}
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// Is it a static variable?
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const bool isStatic(Token::simpleMatch(next, "static"));
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if (isStatic)
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{
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next = next->next();
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}
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// Is it a mutable variable?
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const bool isMutable(Token::simpleMatch(next, "mutable"));
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if (isMutable)
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{
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next = next->next();
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}
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// Is it const..?
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if (next->str() == "const")
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{
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next = next->next();
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}
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// Is it a variable declaration?
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bool isClass = false;
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if (Token::Match(next, "%type% %var% ;|:"))
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{
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if (!next->isStandardType())
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isClass = true;
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varname = next->strAt(1);
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}
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// Structure?
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else if (Token::Match(next, "struct|union %type% %var% ;"))
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{
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varname = next->strAt(2);
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}
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// Pointer?
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else if (Token::Match(next, "%type% * %var% ;"))
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varname = next->strAt(2);
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else if (Token::Match(next, "%type% %type% * %var% ;"))
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varname = next->strAt(3);
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else if (Token::Match(next, "%type% :: %type% * %var% ;"))
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varname = next->strAt(4);
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// Array?
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else if (Token::Match(next, "%type% %var% [") && next->next()->str() != "operator")
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{
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if (!next->isStandardType())
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isClass = true;
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varname = next->strAt(1);
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}
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// Pointer array?
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else if (Token::Match(next, "%type% * %var% ["))
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varname = next->strAt(2);
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else if (Token::Match(next, "%type% :: %type% * %var% ["))
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varname = next->strAt(4);
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// std::string..
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else if (Token::Match(next, "%type% :: %type% %var% ;"))
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{
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isClass = true;
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varname = next->strAt(3);
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}
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// Container..
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else if (Token::Match(next, "%type% :: %type% <") ||
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Token::Match(next, "%type% <"))
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{
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isClass = true;
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// find matching ">"
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int level = 0;
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for (; next; next = next->next())
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{
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if (next->str() == "<")
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level++;
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else if (next->str() == ">")
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{
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level--;
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if (level == 0)
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break;
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}
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}
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if (next && Token::Match(next, "> %var% ;"))
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varname = next->strAt(1);
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else if (next && Token::Match(next, "> * %var% ;"))
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varname = next->strAt(2);
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}
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// If the varname was set in the if-blocks above, create a entry for this variable..
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if (!varname.empty() && varname != "operator")
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{
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Var *var = new Var(varname, false, priv, isMutable, isStatic, isClass, varlist);
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varlist = var;
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}
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}
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return varlist;
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}
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//---------------------------------------------------------------------------
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void CheckClass::initVar(Var *varlist, const std::string &varname)
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{
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for (Var *var = varlist; var; var = var->next)
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{
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if (var->name == varname)
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{
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var->init = true;
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return;
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}
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}
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}
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//---------------------------------------------------------------------------
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void CheckClass::initializeVarList(const Token *tok1, const Token *ftok, Var *varlist, std::list<std::string> &callstack)
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{
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const std::string &classname = tok1->next()->str();
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bool isStruct = tok1->str() == "struct";
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bool Assign = false;
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unsigned int indentlevel = 0;
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for (; ftok; ftok = ftok->next())
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{
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if (!ftok->next())
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break;
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// Class constructor.. initializing variables like this
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// clKalle::clKalle() : var(value) { }
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if (indentlevel == 0)
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{
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if (Assign && Token::Match(ftok, "%var% ("))
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{
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initVar(varlist, ftok->strAt(0));
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// assignment in the initializer..
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// : var(value = x)
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if (Token::Match(ftok->tokAt(2), "%var% ="))
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initVar(varlist, ftok->strAt(2));
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}
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Assign |= (ftok->str() == ":");
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}
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|
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if (ftok->str() == "{")
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{
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++indentlevel;
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Assign = false;
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}
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else if (ftok->str() == "}")
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{
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if (indentlevel <= 1)
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break;
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--indentlevel;
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}
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if (indentlevel < 1)
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continue;
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|
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// Variable getting value from stream?
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if (Token::Match(ftok, ">> %var%"))
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{
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initVar(varlist, ftok->strAt(1));
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}
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// Before a new statement there is "[{};)=]"
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if (! Token::Match(ftok, "[{};()=]"))
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continue;
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|
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if (Token::simpleMatch(ftok, "( !"))
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ftok = ftok->next();
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// Using the operator= function to initialize all variables..
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if (Token::simpleMatch(ftok->next(), "* this = "))
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{
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for (Var *var = varlist; var; var = var->next)
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var->init = true;
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break;
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}
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|
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if (Token::Match(ftok->next(), "%var% . %var% ("))
|
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ftok = ftok->tokAt(2);
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|
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if (!Token::Match(ftok->next(), "%var%") &&
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!Token::Match(ftok->next(), "this . %var%") &&
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!Token::Match(ftok->next(), "* %var% =") &&
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!Token::Match(ftok->next(), "( * this ) . %var%"))
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continue;
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// Goto the first token in this statement..
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ftok = ftok->next();
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|
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// Skip "( * this )"
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if (Token::simpleMatch(ftok, "( * this ) ."))
|
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{
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ftok = ftok->tokAt(5);
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}
|
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|
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// Skip "this->"
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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 ,"))
|
|
{
|
|
for (Var *var = varlist; var; var = var->next)
|
|
var->init = true;
|
|
return;
|
|
}
|
|
|
|
// Clearing array..
|
|
else if (Token::Match(ftok, "memset ( %var% ,"))
|
|
{
|
|
initVar(varlist, 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")
|
|
{
|
|
for (Var *var = varlist; var; var = var->next)
|
|
var->init = true;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// recursive call / calling overloaded function
|
|
// assume that all variables are initialized
|
|
if (std::find(callstack.begin(), callstack.end(), ftok->str()) != callstack.end())
|
|
{
|
|
for (Var *var = varlist; var; var = var->next)
|
|
var->init = true;
|
|
return;
|
|
}
|
|
|
|
int i = 0;
|
|
const Token *ftok2 = _tokenizer->findClassFunction(tok1, classname, ftok->strAt(0), i, isStruct);
|
|
if (ftok2)
|
|
{
|
|
callstack.push_back(ftok->str());
|
|
initializeVarList(tok1, ftok2, varlist, callstack);
|
|
callstack.pop_back();
|
|
}
|
|
else // there is a called member function, but it is not defined where we can find it, so we assume it initializes everything
|
|
{
|
|
// check if the function is part of this class..
|
|
const Token *tok = Token::findmatch(_tokenizer->tokens(), (tok1->str() + " " + classname + " {|:").c_str());
|
|
bool derived = false;
|
|
while (tok && tok->str() != "{")
|
|
{
|
|
if (tok->str() == ":")
|
|
derived = true;
|
|
tok = tok->next();
|
|
}
|
|
|
|
for (tok = tok ? tok->next() : 0; tok; tok = tok->next())
|
|
{
|
|
if (tok->str() == "{")
|
|
{
|
|
tok = tok->link();
|
|
if (!tok)
|
|
break;
|
|
}
|
|
else if (tok->str() == "}")
|
|
{
|
|
break;
|
|
}
|
|
else if (tok->str() == ftok->str() || tok->str() == "friend")
|
|
{
|
|
if (tok->next()->str() == "(" || tok->str() == "friend")
|
|
{
|
|
tok = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// bail out..
|
|
if (!tok || derived)
|
|
{
|
|
for (Var *var = varlist; var; var = var->next)
|
|
var->init = true;
|
|
break;
|
|
}
|
|
|
|
// the function is external and it's neither friend nor inherited virtual function.
|
|
// assume all variables that are passed to it are initialized..
|
|
unsigned int indentlevel2 = 0;
|
|
for (tok = ftok->tokAt(2); tok; tok = tok->next())
|
|
{
|
|
if (tok->str() == "(")
|
|
++indentlevel2;
|
|
else if (tok->str() == ")")
|
|
{
|
|
if (indentlevel2 == 0)
|
|
break;
|
|
--indentlevel2;
|
|
}
|
|
if (tok->isName())
|
|
{
|
|
initVar(varlist, tok->strAt(0));
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Assignment of member variable?
|
|
else if (Token::Match(ftok, "%var% ="))
|
|
{
|
|
initVar(varlist, ftok->strAt(0));
|
|
}
|
|
|
|
// Assignment of array item of member variable?
|
|
else if (Token::Match(ftok, "%var% [ %any% ] ="))
|
|
{
|
|
initVar(varlist, ftok->strAt(0));
|
|
}
|
|
|
|
// Assignment of array item of member variable?
|
|
else if (Token::Match(ftok, "%var% [ %any% ] [ %any% ] ="))
|
|
{
|
|
initVar(varlist, ftok->strAt(0));
|
|
}
|
|
|
|
// Assignment of array item of member variable?
|
|
else if (Token::Match(ftok, "* %var% ="))
|
|
{
|
|
initVar(varlist, ftok->strAt(1));
|
|
}
|
|
|
|
// Assignment of struct member of member variable?
|
|
else if (Token::Match(ftok, "%var% . %any% ="))
|
|
{
|
|
initVar(varlist, ftok->strAt(0));
|
|
}
|
|
|
|
// The functions 'clear' and 'Clear' are supposed to initialize variable.
|
|
if (Token::Match(ftok, "%var% . clear|Clear ("))
|
|
{
|
|
initVar(varlist, ftok->strAt(0));
|
|
}
|
|
}
|
|
}
|
|
|
|
bool CheckClass::argsMatch(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);
|
|
continue;
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
first = first->next();
|
|
second = second->next();
|
|
}
|
|
|
|
return match;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: Check that all class constructors are ok.
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::constructors()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
createSymbolDatabase();
|
|
|
|
std::multimap<std::string, SpaceInfo *>::iterator i;
|
|
|
|
for (i = spaceInfoMMap.begin(); i != spaceInfoMMap.end(); ++i)
|
|
{
|
|
SpaceInfo *info = i->second;
|
|
|
|
// There are no constructors.
|
|
if (info->numConstructors == 0)
|
|
{
|
|
// If there is a private variable, there should be a constructor..
|
|
for (const Var *var = info->varlist; var; var = var->next)
|
|
{
|
|
if (var->priv && !var->isClass && !var->isStatic)
|
|
{
|
|
noConstructorError(info->classDef, info->className, info->classDef->str() == "struct");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::list<Func>::const_iterator it;
|
|
|
|
for (it = info->functionList.begin(); it != info->functionList.end(); ++it)
|
|
{
|
|
if (!it->hasBody || !(it->type == Func::Constructor || it->type == Func::CopyConstructor || it->type == Func::OperatorEqual))
|
|
continue;
|
|
|
|
// Mark all variables not used
|
|
for (Var *var = info->varlist; var; var = var->next)
|
|
var->init = false;
|
|
|
|
std::list<std::string> callstack;
|
|
initializeVarList(info->classDef, it->token, info->varlist, callstack);
|
|
|
|
// Check if any variables are uninitialized
|
|
for (Var *var = info->varlist; var; var = var->next)
|
|
{
|
|
// skip classes for regular constructor
|
|
if (var->isClass && it->type == Func::Constructor)
|
|
continue;
|
|
|
|
if (var->init || var->isStatic)
|
|
continue;
|
|
|
|
// It's non-static and it's not initialized => error
|
|
if (it->type == Func::OperatorEqual)
|
|
{
|
|
const Token *operStart = 0;
|
|
if (it->token->str() == "=")
|
|
operStart = it->token->tokAt(1);
|
|
else
|
|
operStart = it->token->tokAt(3);
|
|
|
|
bool classNameUsed = false;
|
|
for (const Token *operTok = operStart; operTok != operStart->link(); operTok = operTok->next())
|
|
{
|
|
if (operTok->str() == info->className)
|
|
{
|
|
classNameUsed = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (classNameUsed)
|
|
operatorEqVarError(it->token, info->className, var->name);
|
|
}
|
|
else if (it->access != Private && !var->isStatic)
|
|
uninitVarError(it->token, info->className, var->name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: Unused private functions
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::privateFunctions()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
const char pattern_class[] = "class|struct %var% {|:";
|
|
|
|
// Locate some class
|
|
for (const Token *tok1 = Token::findmatch(_tokenizer->tokens(), pattern_class);
|
|
tok1; tok1 = Token::findmatch(tok1->next(), pattern_class))
|
|
{
|
|
/** @todo check that the whole class implementation is seen */
|
|
// until the todo above is fixed we only check classes that are
|
|
// declared in the source file
|
|
if (tok1->fileIndex() != 0)
|
|
continue;
|
|
|
|
const std::string &classname = tok1->next()->str();
|
|
|
|
// Get private functions..
|
|
std::list<const Token *> FuncList;
|
|
FuncList.clear();
|
|
bool isStruct = tok1->str() == "struct";
|
|
bool priv = !isStruct;
|
|
unsigned int indent_level = 0;
|
|
for (const Token *tok = tok1; tok; tok = tok->next())
|
|
{
|
|
if (Token::Match(tok, "friend %var%"))
|
|
{
|
|
/** @todo Handle friend classes */
|
|
FuncList.clear();
|
|
break;
|
|
}
|
|
|
|
if (tok->str() == "{")
|
|
++indent_level;
|
|
else if (tok->str() == "}")
|
|
{
|
|
if (indent_level <= 1)
|
|
break;
|
|
--indent_level;
|
|
}
|
|
|
|
else if (indent_level != 1)
|
|
continue;
|
|
else if (tok->str() == "private:")
|
|
priv = true;
|
|
else if (tok->str() == "public:")
|
|
priv = false;
|
|
else if (tok->str() == "protected:")
|
|
priv = false;
|
|
else if (priv)
|
|
{
|
|
if (Token::Match(tok, "typedef %type% ("))
|
|
tok = tok->tokAt(2)->link();
|
|
|
|
else if (Token::Match(tok, "[:,] %var% ("))
|
|
tok = tok->tokAt(2)->link();
|
|
|
|
else if (Token::Match(tok, "%var% (") &&
|
|
!Token::simpleMatch(tok->next()->link(), ") (") &&
|
|
!Token::Match(tok, classname.c_str()))
|
|
{
|
|
FuncList.push_back(tok);
|
|
}
|
|
}
|
|
|
|
/** @todo embedded class have access to private functions */
|
|
if (tok->str() == "class")
|
|
{
|
|
FuncList.clear();
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Check that all private functions are used..
|
|
bool HasFuncImpl = false;
|
|
bool inclass = false;
|
|
indent_level = 0;
|
|
for (const Token *ftok = _tokenizer->tokens(); ftok; ftok = ftok->next())
|
|
{
|
|
if (ftok->str() == "{")
|
|
++indent_level;
|
|
else if (ftok->str() == "}")
|
|
{
|
|
if (indent_level > 0)
|
|
--indent_level;
|
|
if (indent_level == 0)
|
|
inclass = false;
|
|
}
|
|
|
|
if (Token::Match(ftok, ("class " + classname + " :|{").c_str()))
|
|
{
|
|
indent_level = 0;
|
|
inclass = true;
|
|
}
|
|
|
|
// Check member class functions to see what functions are used..
|
|
if ((inclass && indent_level == 1 && Token::Match(ftok, "%var% (")) ||
|
|
(Token::Match(ftok, (classname + " :: ~| %var% (").c_str())))
|
|
{
|
|
while (ftok && ftok->str() != ")")
|
|
ftok = ftok->next();
|
|
if (!ftok)
|
|
break;
|
|
if (Token::Match(ftok, ") : %var% ("))
|
|
{
|
|
while (!Token::Match(ftok->next(), "[{};]"))
|
|
{
|
|
if (Token::Match(ftok, "::|,|( %var% ,|)"))
|
|
{
|
|
// Remove function from FuncList
|
|
std::list<const Token *>::iterator it = FuncList.begin();
|
|
while (it != FuncList.end())
|
|
{
|
|
if (ftok->next()->str() == (*it)->str())
|
|
FuncList.erase(it++);
|
|
else
|
|
it++;
|
|
}
|
|
}
|
|
ftok = ftok->next();
|
|
}
|
|
}
|
|
if (!Token::Match(ftok, ") const| {"))
|
|
continue;
|
|
|
|
if (ftok->fileIndex() == 0)
|
|
HasFuncImpl = true;
|
|
|
|
// Parse function..
|
|
int indentlevel2 = 0;
|
|
for (const Token *tok2 = ftok; tok2; tok2 = tok2->next())
|
|
{
|
|
if (tok2->str() == "{")
|
|
++indentlevel2;
|
|
else if (tok2->str() == "}")
|
|
{
|
|
--indentlevel2;
|
|
if (indentlevel2 < 1)
|
|
break;
|
|
}
|
|
else if (Token::Match(tok2, "%var% ("))
|
|
{
|
|
// Remove function from FuncList
|
|
std::list<const Token *>::iterator it = FuncList.begin();
|
|
while (it != FuncList.end())
|
|
{
|
|
if (tok2->str() == (*it)->str())
|
|
FuncList.erase(it++);
|
|
else
|
|
it++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
while (HasFuncImpl && !FuncList.empty())
|
|
{
|
|
// Final check; check if the function pointer is used somewhere..
|
|
const std::string _pattern("return|(|)|,|= " + FuncList.front()->str());
|
|
if (!Token::findmatch(_tokenizer->tokens(), _pattern.c_str()))
|
|
{
|
|
unusedPrivateFunctionError(FuncList.front(), classname, FuncList.front()->str());
|
|
}
|
|
FuncList.pop_front();
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: Check that memset is not used on classes
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::noMemset()
|
|
{
|
|
// Locate all 'memset' tokens..
|
|
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next())
|
|
{
|
|
if (!Token::Match(tok, "memset|memcpy|memmove"))
|
|
continue;
|
|
|
|
std::string type;
|
|
if (Token::Match(tok, "memset ( %var% , %num% , sizeof ( %type% ) )"))
|
|
type = tok->strAt(8);
|
|
else if (Token::Match(tok, "memset ( & %var% , %num% , sizeof ( %type% ) )"))
|
|
type = tok->strAt(9);
|
|
else if (Token::Match(tok, "memset ( %var% , %num% , sizeof ( struct %type% ) )"))
|
|
type = tok->strAt(9);
|
|
else if (Token::Match(tok, "memset ( & %var% , %num% , sizeof ( struct %type% ) )"))
|
|
type = tok->strAt(10);
|
|
else if (Token::Match(tok, "%type% ( %var% , %var% , sizeof ( %type% ) )"))
|
|
type = tok->strAt(8);
|
|
|
|
// No type defined => The tokens didn't match
|
|
if (type.empty())
|
|
continue;
|
|
|
|
// Warn if type is a class or struct that contains any std::* variables
|
|
const std::string pattern2(std::string("struct|class ") + type + " {");
|
|
for (const Token *tstruct = Token::findmatch(_tokenizer->tokens(), pattern2.c_str()); tstruct; tstruct = tstruct->next())
|
|
{
|
|
if (tstruct->str() == "}")
|
|
break;
|
|
|
|
// struct with function? skip function body..
|
|
if (Token::simpleMatch(tstruct, ") {"))
|
|
{
|
|
tstruct = tstruct->next()->link();
|
|
if (!tstruct)
|
|
break;
|
|
}
|
|
|
|
// before a statement there must be either:
|
|
// * private:|protected:|public:
|
|
// * { } ;
|
|
if (Token::Match(tstruct, "[;{}]") ||
|
|
tstruct->str().find(":") != std::string::npos)
|
|
{
|
|
if (Token::Match(tstruct->next(), "std :: %type% %var% ;"))
|
|
memsetStructError(tok, tok->str(), tstruct->strAt(3));
|
|
|
|
else if (Token::Match(tstruct->next(), "std :: %type% < "))
|
|
{
|
|
// backup the type
|
|
const std::string typestr(tstruct->strAt(3));
|
|
|
|
// check if it's a pointer variable..
|
|
unsigned int level = 0;
|
|
while (0 != (tstruct = tstruct->next()))
|
|
{
|
|
if (tstruct->str() == "<")
|
|
++level;
|
|
else if (tstruct->str() == ">")
|
|
{
|
|
if (level <= 1)
|
|
break;
|
|
--level;
|
|
}
|
|
else if (tstruct->str() == "(")
|
|
tstruct = tstruct->link();
|
|
}
|
|
|
|
if (!tstruct)
|
|
break;
|
|
|
|
// found error => report
|
|
if (Token::Match(tstruct, "> %var% ;"))
|
|
memsetStructError(tok, tok->str(), typestr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: "void operator=("
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::operatorEq()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
createSymbolDatabase();
|
|
|
|
std::multimap<std::string, SpaceInfo *>::const_iterator i;
|
|
|
|
for (i = spaceInfoMMap.begin(); i != spaceInfoMMap.end(); ++i)
|
|
{
|
|
std::list<Func>::const_iterator it;
|
|
|
|
for (it = i->second->functionList.begin(); it != i->second->functionList.end(); ++it)
|
|
{
|
|
if (it->type == Func::OperatorEqual && it->access != Private)
|
|
{
|
|
if (it->token->strAt(-2) == "void")
|
|
operatorEqReturnError(it->token->tokAt(-2));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: "C& operator=(const C&) { ... return *this; }"
|
|
// operator= should return a reference to *this
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::operatorEqRetRefThis()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
createSymbolDatabase();
|
|
|
|
std::multimap<std::string, SpaceInfo *>::const_iterator i;
|
|
|
|
for (i = spaceInfoMMap.begin(); i != spaceInfoMMap.end(); ++i)
|
|
{
|
|
const SpaceInfo *info = i->second;
|
|
std::list<Func>::const_iterator it;
|
|
|
|
for (it = info->functionList.begin(); it != info->functionList.end(); ++it)
|
|
{
|
|
if (it->type == Func::OperatorEqual && it->hasBody)
|
|
{
|
|
// make sure return signature is correct
|
|
if (Token::Match(it->tokenDef->tokAt(-4), ";|}|{|public:|protected:|private: %type% &") &&
|
|
it->tokenDef->strAt(-3) == info->className)
|
|
{
|
|
// find the ')'
|
|
const Token *tok = it->token->next()->link();
|
|
|
|
bool foundReturn = false;
|
|
const Token *last = tok->next()->link();
|
|
for (tok = tok->tokAt(2); tok && tok != last; tok = tok->next())
|
|
{
|
|
// check for return of reference to this
|
|
if (tok->str() == "return")
|
|
{
|
|
foundReturn = true;
|
|
std::string cast("( " + info->className + " & )");
|
|
if (Token::Match(tok->next(), cast.c_str()))
|
|
tok = tok->tokAt(4);
|
|
|
|
if (!(Token::Match(tok->tokAt(1), "(| * this ;|=") ||
|
|
Token::Match(tok->tokAt(1), "(| * this +=") ||
|
|
Token::Match(tok->tokAt(1), "operator = (")))
|
|
operatorEqRetRefThisError(it->token);
|
|
}
|
|
}
|
|
if (!foundReturn)
|
|
operatorEqRetRefThisError(it->token);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// ClassCheck: "C& operator=(const C& rhs) { if (this == &rhs) ... }"
|
|
// operator= should check for assignment to self
|
|
//
|
|
// For simple classes, an assignment to self check is only a potential optimization.
|
|
//
|
|
// For classes that allocate dynamic memory, assignment to self can be a real error
|
|
// if it is deallocated and allocated again without being checked for.
|
|
//
|
|
// This check is not valid for classes with multiple inheritance because a
|
|
// class can have multiple addresses so there is no trivial way to check for
|
|
// assignment to self.
|
|
//---------------------------------------------------------------------------
|
|
|
|
// match two lists of tokens
|
|
static bool nameMatch(const Token * tok1, const Token * tok2, int length)
|
|
{
|
|
for (int i = 0; i < length; i++)
|
|
{
|
|
if (tok1->tokAt(i) == 0 || tok2->tokAt(i) == 0)
|
|
return false;
|
|
|
|
if (tok1->tokAt(i)->str() != tok2->tokAt(i)->str())
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// create a class name from a list of tokens
|
|
static void nameStr(const Token * name, int length, std::string & str)
|
|
{
|
|
for (int i = 0; i < length; i++)
|
|
{
|
|
if (i != 0)
|
|
str += " ";
|
|
|
|
str += name->tokAt(i)->str();
|
|
}
|
|
}
|
|
|
|
static bool hasDeallocation(const Token * first, const Token * last)
|
|
{
|
|
// This function is called when no simple check was found for assignment
|
|
// to self. We are currently looking for a specific sequence of:
|
|
// deallocate member ; ... member = allocate
|
|
// This check is far from ideal because it can cause false negatives.
|
|
// Unfortunately, this is necessary to prevent false positives.
|
|
// This check needs to do careful analysis someday to get this
|
|
// correct with a high degree of certainty.
|
|
for (const Token * tok = first; tok && (tok != last); tok = tok->next())
|
|
{
|
|
// check for deallocating memory
|
|
if (Token::Match(tok, "{|;|, free ( %var%"))
|
|
{
|
|
const Token * var = tok->tokAt(3);
|
|
|
|
// we should probably check that var is a pointer in this class
|
|
|
|
const Token * tok1 = tok->tokAt(4);
|
|
|
|
while (tok1 && (tok1 != last))
|
|
{
|
|
if (Token::Match(tok1, "%var% ="))
|
|
{
|
|
if (tok1->str() == var->str())
|
|
return true;
|
|
}
|
|
|
|
tok1 = tok1->next();
|
|
}
|
|
}
|
|
else if (Token::Match(tok, "{|;|, delete [ ] %var%"))
|
|
{
|
|
const Token * var = tok->tokAt(4);
|
|
|
|
// we should probably check that var is a pointer in this class
|
|
|
|
const Token * tok1 = tok->tokAt(5);
|
|
|
|
while (tok1 && (tok1 != last))
|
|
{
|
|
if (Token::Match(tok1, "%var% = new %type% ["))
|
|
{
|
|
if (tok1->str() == var->str())
|
|
return true;
|
|
}
|
|
|
|
tok1 = tok1->next();
|
|
}
|
|
}
|
|
else if (Token::Match(tok, "{|;|, delete %var%"))
|
|
{
|
|
const Token * var = tok->tokAt(2);
|
|
|
|
// we should probably check that var is a pointer in this class
|
|
|
|
const Token * tok1 = tok->tokAt(3);
|
|
|
|
while (tok1 && (tok1 != last))
|
|
{
|
|
if (Token::Match(tok1, "%var% = new"))
|
|
{
|
|
if (tok1->str() == var->str())
|
|
return true;
|
|
}
|
|
|
|
tok1 = tok1->next();
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool hasAssignSelf(const Token * first, const Token * last, const Token * rhs)
|
|
{
|
|
for (const Token * tok = first; tok && tok != last; tok = tok->next())
|
|
{
|
|
if (Token::Match(tok, "if ("))
|
|
{
|
|
const Token * tok1 = tok->tokAt(2);
|
|
const Token * tok2 = tok->tokAt(1)->link();
|
|
|
|
if (tok1 && tok2)
|
|
{
|
|
for (; tok1 && tok1 != tok2; tok1 = tok1->next())
|
|
{
|
|
if (Token::Match(tok1, "this ==|!= & %var%"))
|
|
{
|
|
if (tok1->tokAt(3)->str() == rhs->str())
|
|
return true;
|
|
}
|
|
else if (Token::Match(tok1, "& %var% ==|!= this"))
|
|
{
|
|
if (tok1->tokAt(1)->str() == rhs->str())
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool hasMultipleInheritanceInline(const Token * tok)
|
|
{
|
|
while (tok && tok->str() != "{")
|
|
{
|
|
if (tok->str() == ",")
|
|
return true;
|
|
|
|
tok = tok->next();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool hasMultipleInheritanceGlobal(const Token * start, const std::string & name)
|
|
{
|
|
const Token *tok = start;
|
|
std::string pattern;
|
|
std::string className = name;
|
|
|
|
// check for nested classes
|
|
while (className.find("::") != std::string::npos)
|
|
{
|
|
std::string tempName;
|
|
|
|
// there is probably a better way to do this
|
|
while (className[0] != ' ')
|
|
{
|
|
tempName += className[0];
|
|
className.erase(0, 1);
|
|
}
|
|
|
|
className.erase(0, 4);
|
|
|
|
pattern = "class|struct " + tempName;
|
|
|
|
tok = Token::findmatch(tok, pattern.c_str());
|
|
}
|
|
|
|
pattern = "class|struct " + className;
|
|
|
|
tok = Token::findmatch(tok, pattern.c_str());
|
|
|
|
return hasMultipleInheritanceInline(tok);
|
|
}
|
|
|
|
void CheckClass::operatorEqToSelf()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
const Token *tok2 = _tokenizer->tokens();
|
|
const Token *tok;
|
|
|
|
while ((tok = Token::findmatch(tok2, "operator = (")) != NULL)
|
|
{
|
|
const Token *tok1 = tok;
|
|
|
|
// make sure this is an assignment operator
|
|
if (tok1->tokAt(-2) && Token::Match(tok1->tokAt(-2), " %type% ::"))
|
|
{
|
|
int nameLength = 1;
|
|
|
|
tok1 = tok1->tokAt(-2);
|
|
|
|
// check backwards for proper function signature
|
|
while (tok1->tokAt(-2) && Token::Match(tok1->tokAt(-2), " %type% ::"))
|
|
{
|
|
tok1 = tok1->tokAt(-2);
|
|
nameLength += 2;
|
|
}
|
|
|
|
const Token *className = tok1;
|
|
std::string nameString;
|
|
|
|
nameStr(className, nameLength, nameString);
|
|
|
|
if (!hasMultipleInheritanceGlobal(_tokenizer->tokens(), nameString))
|
|
{
|
|
if (tok1->tokAt(-1) && tok1->tokAt(-1)->str() == "&")
|
|
{
|
|
// check returned class name
|
|
if (tok1->tokAt(-(1 + nameLength)) && nameMatch(className, tok1->tokAt(-(1 + nameLength)), nameLength))
|
|
{
|
|
// check forward for proper function signature
|
|
std::string pattern = "const " + nameString + " & %var% )";
|
|
if (Token::Match(tok->tokAt(3), pattern.c_str()))
|
|
{
|
|
const Token * rhs = tok->tokAt(5 + nameLength);
|
|
|
|
if (nameMatch(className, tok->tokAt(4), nameLength))
|
|
{
|
|
tok1 = tok->tokAt(2)->link();
|
|
|
|
if (tok1 && tok1->tokAt(1) && tok1->tokAt(1)->str() == "{" && tok1->tokAt(1)->link())
|
|
{
|
|
const Token *first = tok1->tokAt(1);
|
|
const Token *last = first->link();
|
|
|
|
if (!hasAssignSelf(first, last, rhs))
|
|
{
|
|
if (hasDeallocation(first, last))
|
|
operatorEqToSelfError(tok);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
tok1 = tok;
|
|
|
|
// check backwards for proper function signature
|
|
if (tok1->tokAt(-1) && tok1->tokAt(-1)->str() == "&")
|
|
{
|
|
const Token *className = 0;
|
|
while (tok1 && !Token::Match(tok1, "class|struct %var%"))
|
|
tok1 = tok1->previous();
|
|
|
|
if (Token::Match(tok1, "struct|class %var%"))
|
|
className = tok1->tokAt(1);
|
|
|
|
if (!hasMultipleInheritanceInline(tok1))
|
|
{
|
|
if (Token::simpleMatch(tok->tokAt(-2), className->str().c_str()))
|
|
{
|
|
// check forward for proper function signature
|
|
if (Token::Match(tok->tokAt(3), "const %type% & %var% )"))
|
|
{
|
|
const Token * rhs = tok->tokAt(6);
|
|
|
|
if (tok->tokAt(4)->str() == className->str())
|
|
{
|
|
tok1 = tok->tokAt(2)->link();
|
|
|
|
if (tok1 && Token::simpleMatch(tok1->next(), "{"))
|
|
{
|
|
const Token *first = tok1->next();
|
|
const Token *last = first->link();
|
|
|
|
if (!hasAssignSelf(first, last, rhs))
|
|
{
|
|
if (hasDeallocation(first, last))
|
|
operatorEqToSelfError(tok);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
tok2 = tok->next();
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
|
//---------------------------------------------------------------------------
|
|
// A destructor in a base class should be virtual
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::virtualDestructor()
|
|
{
|
|
// This error should only be given if:
|
|
// * base class doesn't have virtual destructor
|
|
// * derived class has non-empty destructor
|
|
// * base class is deleted
|
|
if (!_settings->inconclusive)
|
|
return;
|
|
|
|
const char pattern_classdecl[] = "class %var% : %var%";
|
|
|
|
const Token *derived = _tokenizer->tokens();
|
|
while ((derived = Token::findmatch(derived, pattern_classdecl)) != NULL)
|
|
{
|
|
// Check that the derived class has a non empty destructor..
|
|
{
|
|
std::ostringstream destructorPattern;
|
|
destructorPattern << "~ " << derived->strAt(1) << " ( ) {";
|
|
const Token *derived_destructor = Token::findmatch(_tokenizer->tokens(), destructorPattern.str().c_str());
|
|
|
|
// No destructor..
|
|
if (! derived_destructor)
|
|
{
|
|
derived = derived->next();
|
|
continue;
|
|
}
|
|
|
|
// Empty destructor..
|
|
if (Token::Match(derived_destructor, "~ %var% ( ) { }"))
|
|
{
|
|
derived = derived->next();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
const Token *derivedClass = derived->tokAt(1);
|
|
|
|
// Iterate through each base class...
|
|
derived = derived->tokAt(3);
|
|
while (Token::Match(derived, "%var%"))
|
|
{
|
|
bool isPublic(derived->str() == "public");
|
|
|
|
// What kind of inheritance is it.. public|protected|private
|
|
if (Token::Match(derived, "public|protected|private"))
|
|
derived = derived->next();
|
|
|
|
// Name of base class..
|
|
const std::string baseName = derived->strAt(0);
|
|
|
|
// Update derived so it's ready for the next loop.
|
|
do
|
|
{
|
|
if (derived->str() == "{")
|
|
break;
|
|
|
|
if (derived->str() == ",")
|
|
{
|
|
derived = derived->next();
|
|
break;
|
|
}
|
|
|
|
derived = derived->next();
|
|
}
|
|
while (derived);
|
|
|
|
// If not public inheritance, skip checking of this base class..
|
|
if (! isPublic)
|
|
continue;
|
|
|
|
// Find the destructor declaration for the base class.
|
|
const Token *base = Token::findmatch(_tokenizer->tokens(), (std::string("%any% ~ ") + baseName + " (").c_str());
|
|
while (base && base->str() == "::")
|
|
base = Token::findmatch(base->next(), (std::string("%any% ~ ") + baseName + " (").c_str());
|
|
|
|
const Token *reverseTok = base;
|
|
while (Token::Match(base, "%var%") && base->str() != "virtual")
|
|
base = base->previous();
|
|
|
|
// Check that there is a destructor..
|
|
if (! base)
|
|
{
|
|
// Is the class declaration available?
|
|
base = Token::findmatch(_tokenizer->tokens(), (std::string("class ") + baseName + " {").c_str());
|
|
if (base)
|
|
{
|
|
virtualDestructorError(base, baseName, derivedClass->str());
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
// There is a destructor. Check that it's virtual..
|
|
else if (base->str() == "virtual")
|
|
continue;
|
|
|
|
// TODO: This is just a temporary fix, better solution is needed.
|
|
// Skip situations where base class has base classes of its own, because
|
|
// some of the base classes might have virtual destructor.
|
|
// Proper solution is to check all of the base classes. If base class is not
|
|
// found or if one of the base classes has virtual destructor, error should not
|
|
// be printed. See TODO test case "virtualDestructorInherited"
|
|
if (!Token::findmatch(_tokenizer->tokens(), (std::string("class ") + baseName + " {").c_str()))
|
|
continue;
|
|
|
|
// Make sure that the destructor is public (protected or private
|
|
// would not compile if inheritance is used in a way that would
|
|
// cause the bug we are trying to find here.)
|
|
int indent = 0;
|
|
while (reverseTok)
|
|
{
|
|
if (reverseTok->str() == "public:")
|
|
{
|
|
virtualDestructorError(base, baseName, derivedClass->str());
|
|
break;
|
|
}
|
|
else if (reverseTok->str() == "protected:" ||
|
|
reverseTok->str() == "private:")
|
|
{
|
|
// No bug, protected/private destructor is allowed
|
|
break;
|
|
}
|
|
else if (reverseTok->str() == "{")
|
|
{
|
|
indent++;
|
|
if (indent >= 1)
|
|
{
|
|
// We have found the start of the class without any sign
|
|
// of "public :" so we can assume that the destructor is not
|
|
// public and there is no bug in the code we are checking.
|
|
break;
|
|
}
|
|
}
|
|
else if (reverseTok->str() == "}")
|
|
indent--;
|
|
|
|
reverseTok = reverseTok->previous();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
void CheckClass::thisSubtractionError(const Token *tok)
|
|
{
|
|
reportError(tok, Severity::style, "thisSubtraction", "Suspicious pointer subtraction");
|
|
}
|
|
|
|
void CheckClass::thisSubtraction()
|
|
{
|
|
if (!_settings->_checkCodingStyle)
|
|
return;
|
|
|
|
const Token *tok = _tokenizer->tokens();
|
|
for (;;)
|
|
{
|
|
tok = Token::findmatch(tok, "this - %var%");
|
|
if (!tok)
|
|
break;
|
|
|
|
if (!Token::simpleMatch(tok->previous(), "*"))
|
|
thisSubtractionError(tok);
|
|
|
|
tok = tok->next();
|
|
}
|
|
}
|
|
//---------------------------------------------------------------------------
|
|
|
|
// check if this function is defined virtual in the base classes
|
|
bool CheckClass::isVirtual(const std::vector<std::string> &derivedFrom, const Token *functionToken) const
|
|
{
|
|
// check each base class
|
|
for (unsigned int i = 0; i < derivedFrom.size(); ++i)
|
|
{
|
|
std::string className;
|
|
|
|
if (derivedFrom[i].find("::") != std::string::npos)
|
|
{
|
|
/** @todo handle nested base classes and namespaces */
|
|
}
|
|
else
|
|
className = derivedFrom[i];
|
|
|
|
std::string classPattern = std::string("class|struct ") + className + std::string(" {|:");
|
|
|
|
// find the base class
|
|
const Token *classToken = Token::findmatch(_tokenizer->tokens(), classPattern.c_str());
|
|
|
|
// find the function in the base class
|
|
if (classToken)
|
|
{
|
|
std::vector<std::string> baseList;
|
|
const Token * tok = classToken;
|
|
|
|
while (tok->str() != "{")
|
|
{
|
|
// check for base classes
|
|
if (Token::Match(tok, ":|, public|protected|private"))
|
|
{
|
|
// jump to base class name
|
|
tok = tok->tokAt(2);
|
|
|
|
std::string base;
|
|
|
|
// handle nested base classea and namespacess
|
|
while (Token::Match(tok, "%var% ::"))
|
|
{
|
|
base += tok->str();
|
|
base += " :: ";
|
|
tok = tok->tokAt(2);
|
|
}
|
|
|
|
base += tok->str();
|
|
|
|
// save pattern for base class name
|
|
baseList.push_back(base);
|
|
}
|
|
tok = tok->next();
|
|
}
|
|
|
|
tok = tok->next();
|
|
|
|
for (; tok; tok = tok->next())
|
|
{
|
|
if (tok->str() == "{")
|
|
tok = tok->link();
|
|
else if (tok->str() == "}")
|
|
break;
|
|
else if (Token::Match(tok, "public:|protected:|private:"))
|
|
continue;
|
|
else if (tok->str() == "(")
|
|
tok = tok->link();
|
|
else if (tok->str() == "virtual")
|
|
{
|
|
// goto the function name
|
|
while (tok->next()->str() != "(")
|
|
tok = tok->next();
|
|
|
|
// do the function names match?
|
|
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(tok->tokAt(2), functionToken->tokAt(2), std::string(""), 0))
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!baseList.empty())
|
|
{
|
|
if (isVirtual(baseList, functionToken))
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Can a function be const?
|
|
void CheckClass::checkConst()
|
|
{
|
|
if (!_settings->_checkCodingStyle || _settings->ifcfg)
|
|
return;
|
|
|
|
createSymbolDatabase();
|
|
|
|
std::multimap<std::string, SpaceInfo *>::iterator it;
|
|
|
|
for (it = spaceInfoMMap.begin(); it != spaceInfoMMap.end(); ++it)
|
|
{
|
|
SpaceInfo *info = it->second;
|
|
|
|
std::list<Func>::iterator it1;
|
|
|
|
for (it1 = info->functionList.begin(); it1 != info->functionList.end(); ++it1)
|
|
{
|
|
const Func & func = *it1;
|
|
|
|
// does the function have a body?
|
|
if (func.type == Func::Function && func.hasBody && !func.isFriend && !func.isStatic && !func.isConst && !func.isVirtual)
|
|
{
|
|
// get function name
|
|
const std::string functionName((func.tokenDef->isName() ? "" : "operator") + func.tokenDef->str());
|
|
|
|
// get last token of return type
|
|
const Token *previous = func.tokenDef->isName() ? func.token->previous() : func.token->tokAt(-2);
|
|
while (previous->str() == "::")
|
|
previous = previous->tokAt(-2);
|
|
|
|
// does the function return a pointer or reference?
|
|
if (Token::Match(previous, "*|&"))
|
|
{
|
|
const Token *temp = func.token->previous();
|
|
|
|
while (!Token::Match(temp->previous(), ";|}|{|public:|protected:|private:"))
|
|
temp = temp->previous();
|
|
|
|
if (temp->str() != "const")
|
|
continue;
|
|
}
|
|
else if (Token::Match(previous->previous(), "*|& >"))
|
|
{
|
|
const Token *temp = func.token->previous();
|
|
|
|
while (!Token::Match(temp->previous(), ";|}|{|public:|protected:|private:"))
|
|
{
|
|
temp = temp->previous();
|
|
if (temp->str() == "const")
|
|
break;
|
|
}
|
|
|
|
if (temp->str() != "const")
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
// don't warn for unknown types..
|
|
// LPVOID, HDC, etc
|
|
if (previous->isName())
|
|
{
|
|
bool allupper = true;
|
|
const std::string s(previous->str());
|
|
for (std::string::size_type pos = 0; pos < s.size(); ++pos)
|
|
{
|
|
const char ch = s[pos];
|
|
if (!(ch == '_' || (ch >= 'A' && ch <= 'Z')))
|
|
{
|
|
allupper = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (allupper)
|
|
continue;
|
|
}
|
|
}
|
|
|
|
const Token *paramEnd = func.token->next()->link();
|
|
|
|
// check if base class function is virtual
|
|
if (!info->derivedFrom.empty())
|
|
{
|
|
if (isVirtual(info->derivedFrom, func.token))
|
|
continue;
|
|
}
|
|
|
|
// if nothing non-const was found. write error..
|
|
if (checkConstFunc(info->className, info->derivedFrom, info->varlist, paramEnd))
|
|
{
|
|
std::string classname = info->className;
|
|
SpaceInfo *nest = info->nest;
|
|
while (nest)
|
|
{
|
|
classname = std::string(nest->className + "::" + classname);
|
|
nest = nest->nest;
|
|
}
|
|
|
|
if (func.isInline)
|
|
checkConstError(func.token, classname, functionName);
|
|
else // not inline
|
|
checkConstError2(func.token, func.tokenDef, classname, functionName);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool CheckClass::isMemberVar(const std::string &classname, const std::vector<std::string> &derivedFrom, const Var *varlist, const Token *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% ) ["))
|
|
tok = tok->tokAt(2);
|
|
|
|
// ignore class namespace
|
|
if (tok->str() == classname && tok->next()->str() == "::")
|
|
tok = tok->tokAt(2);
|
|
|
|
for (const Var *var = varlist; var; var = var->next)
|
|
{
|
|
if (var->name == tok->str())
|
|
{
|
|
return !var->isMutable;
|
|
}
|
|
}
|
|
|
|
// not found in this class
|
|
if (!derivedFrom.empty())
|
|
{
|
|
// check each base class
|
|
for (unsigned int i = 0; i < derivedFrom.size(); ++i)
|
|
{
|
|
std::string className;
|
|
|
|
if (derivedFrom[i].find("::") != std::string::npos)
|
|
{
|
|
/** @todo handle nested base classes and namespaces */
|
|
}
|
|
else
|
|
className = derivedFrom[i];
|
|
|
|
std::string classPattern = std::string("class|struct ") + className + std::string(" {|:");
|
|
|
|
// find the base class
|
|
const Token *classToken = Token::findmatch(_tokenizer->tokens(), classPattern.c_str());
|
|
|
|
// find the function in the base class
|
|
if (classToken)
|
|
{
|
|
std::vector<std::string> baseList;
|
|
const Token * tok1 = classToken;
|
|
|
|
while (tok1->str() != "{")
|
|
{
|
|
// check for base classes
|
|
if (Token::Match(tok1, ":|, public|protected|private"))
|
|
{
|
|
// jump to base class name
|
|
tok1 = tok1->tokAt(2);
|
|
|
|
std::string base;
|
|
|
|
// handle nested base classea and namespacess
|
|
while (Token::Match(tok1, "%var% ::"))
|
|
{
|
|
base += tok1->str();
|
|
base += " :: ";
|
|
tok1 = tok1->tokAt(2);
|
|
}
|
|
|
|
base += tok1->str();
|
|
|
|
// save pattern for base class name
|
|
baseList.push_back(base);
|
|
}
|
|
tok1 = tok1->next();
|
|
}
|
|
|
|
// Get class variables...
|
|
Var *varlist1 = getVarList(classToken);
|
|
|
|
if (isMemberVar(classToken->next()->str(), baseList, varlist1, tok))
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool CheckClass::checkConstFunc(const std::string &classname, const std::vector<std::string> &derivedFrom, const Var *varlist, 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 && !derivedFrom.empty())
|
|
{
|
|
isconst = false;
|
|
break;
|
|
}
|
|
else if (isMemberVar(classname, derivedFrom, varlist, tok1->previous()))
|
|
{
|
|
isconst = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// streaming: <<
|
|
else if (tok1->str() == "<<" && isMemberVar(classname, derivedFrom, varlist, 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")) ||
|
|
Token::Match(tok1, "%var% < %any% > ("))
|
|
{
|
|
isconst = false;
|
|
break;
|
|
}
|
|
|
|
// delete..
|
|
else if (tok1->str() == "delete")
|
|
{
|
|
isconst = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return isconst;
|
|
}
|
|
|
|
void CheckClass::checkConstError(const Token *tok, const std::string &classname, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::style, "functionConst", "The function '" + classname + "::" + funcname + "' can be const");
|
|
}
|
|
|
|
void CheckClass::checkConstError2(const Token *tok1, const Token *tok2, const std::string &classname, const std::string &funcname)
|
|
{
|
|
std::list<const Token *> toks;
|
|
toks.push_back(tok1);
|
|
toks.push_back(tok2);
|
|
reportError(toks, Severity::style, "functionConst", "The function '" + classname + "::" + funcname + "' can be const");
|
|
}
|
|
|
|
void CheckClass::noConstructorError(const Token *tok, const std::string &classname, bool isStruct)
|
|
{
|
|
reportError(tok, Severity::style, "noConstructor", "The " + std::string(isStruct ? "struct" : "class") + " '" + classname + "' has no constructor. Member variables not initialized.");
|
|
}
|
|
|
|
void CheckClass::uninitVarError(const Token *tok, const std::string &classname, const std::string &varname)
|
|
{
|
|
reportError(tok, Severity::style, "uninitVar", "Member variable not initialized in the constructor '" + classname + "::" + varname + "'");
|
|
}
|
|
|
|
void CheckClass::operatorEqVarError(const Token *tok, const std::string &classname, const std::string &varname)
|
|
{
|
|
reportError(tok, Severity::style, "operatorEqVarError", "Member variable '" + classname + "::" + varname + "' is not assigned a value in '" + classname + "::operator=" + "'");
|
|
}
|
|
|
|
void CheckClass::unusedPrivateFunctionError(const Token *tok, const std::string &classname, const std::string &funcname)
|
|
{
|
|
reportError(tok, Severity::style, "unusedPrivateFunction", "Unused private function '" + classname + "::" + funcname + "'");
|
|
}
|
|
|
|
void CheckClass::memsetClassError(const Token *tok, const std::string &memfunc)
|
|
{
|
|
reportError(tok, Severity::error, "memsetClass", "Using '" + memfunc + "' on class");
|
|
}
|
|
|
|
void CheckClass::memsetStructError(const Token *tok, const std::string &memfunc, const std::string &classname)
|
|
{
|
|
reportError(tok, Severity::error, "memsetStruct", "Using '" + memfunc + "' on struct that contains a 'std::" + classname + "'");
|
|
}
|
|
|
|
void CheckClass::operatorEqReturnError(const Token *tok)
|
|
{
|
|
reportError(tok, Severity::style, "operatorEq", "'operator=' should return something");
|
|
}
|
|
|
|
void CheckClass::virtualDestructorError(const Token *tok, const std::string &Base, const std::string &Derived)
|
|
{
|
|
reportError(tok, Severity::error, "virtualDestructor", "Class " + Base + " which is inherited by class " + Derived + " does not have a virtual destructor");
|
|
}
|
|
|
|
void CheckClass::operatorEqRetRefThisError(const Token *tok)
|
|
{
|
|
reportError(tok, Severity::style, "operatorEqRetRefThis", "'operator=' should return reference to self");
|
|
}
|
|
|
|
void CheckClass::operatorEqToSelfError(const Token *tok)
|
|
{
|
|
reportError(tok, Severity::style, "operatorEqToSelf", "'operator=' should check for assignment to self");
|
|
}
|