367 lines
13 KiB
C++
367 lines
13 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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#ifndef CheckClassH
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#define CheckClassH
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//---------------------------------------------------------------------------
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#include "check.h"
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#include "settings.h"
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#include <map>
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class Token;
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/// @addtogroup Checks
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/// @{
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/** @brief %Check classes. Uninitialized member variables, non-conforming operators, missing virtual destructor, etc */
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class CheckClass : public Check
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{
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public:
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/** @brief This constructor is used when registering the CheckClass */
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CheckClass() : Check(), hasSymbolDatabase(false)
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{ }
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/** @brief This constructor is used when running checks. */
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CheckClass(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger);
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~CheckClass();
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/** @brief Run checks on the normal token list */
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void runChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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{
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CheckClass checkClass(tokenizer, settings, errorLogger);
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// can't be a simplified check .. the 'sizeof' is used.
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checkClass.noMemset();
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}
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/** @brief Run checks on the simplified token list */
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void runSimplifiedChecks(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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{
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CheckClass checkClass(tokenizer, settings, errorLogger);
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// Coding style checks
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checkClass.constructors();
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checkClass.operatorEq();
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checkClass.privateFunctions();
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checkClass.operatorEqRetRefThis();
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checkClass.thisSubtraction();
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checkClass.operatorEqToSelf();
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checkClass.virtualDestructor();
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checkClass.checkConst();
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}
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/** @brief %Check that all class constructors are ok */
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void constructors();
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/** @brief %Check that all private functions are called */
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void privateFunctions();
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/**
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* @brief %Check that the memsets are valid.
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* The 'memset' function can do dangerous things if used wrong. If it
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* is used on STL containers for instance it will clear all its data
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* and then the STL container may leak memory or worse have an invalid state.
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* It can also overwrite the virtual table.
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* Important: The checking doesn't work on simplified tokens list.
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*/
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void noMemset();
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/** @brief 'operator=' should return something. */
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void operatorEq();
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/** @brief 'operator=' should return reference to *this */
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void operatorEqRetRefThis(); // Warning upon no "return *this;"
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/** @brief 'operator=' should check for assignment to self */
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void operatorEqToSelf(); // Warning upon no check for assignment to self
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/** @brief The destructor in a base class should be virtual */
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void virtualDestructor();
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/** @brief warn for "this-x". The indented code may be "this->x" */
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void thisSubtraction();
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/** @brief can member function be const? */
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void checkConst();
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/**
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* @brief Access control. This needs to be public, otherwise it
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* doesn't work to compile with Borland C++
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*/
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enum AccessControl { Public, Protected, Private };
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private:
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/**
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* @brief Create symbol database. For performance reasons, only call
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* it if it's needed.
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*/
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void createSymbolDatabase();
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/**
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* @brief Prevent creating symbol database more than once.
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*
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* Initialize this flag to false in the constructors. If this flag
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* is true the createSymbolDatabase should just bail out. If it is
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* false the createSymbolDatabase will set it to true and create
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* the symbol database.
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*/
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bool hasSymbolDatabase;
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/** @brief Information about a member variable. Used when checking for uninitialized variables */
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class Var
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{
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public:
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Var(const Token *token_, unsigned int index_, AccessControl access_ = Public, bool mutable_ = false, bool static_ = false, bool class_ = false)
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: token(token_),
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index(index_),
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assign(false),
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init(false),
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access(access_),
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isMutable(mutable_),
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isStatic(static_),
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isClass(class_)
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{
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}
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/** @brief variable token */
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const Token *token;
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/** @brief order declared */
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unsigned int index;
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/** @brief has this variable been assigned? */
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bool assign;
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/** @brief has this variable been initialized? */
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bool init;
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/** @brief what section is this variable declared in? */
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AccessControl access; // public/protected/private
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/** @brief is this variable mutable? */
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bool isMutable;
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/** @brief is this variable static? */
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bool isStatic;
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/** @brief is this variable a class (or unknown type)? */
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bool isClass;
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};
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class Func
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{
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public:
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enum Type { Constructor, CopyConstructor, OperatorEqual, Destructor, Function };
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Func()
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: tokenDef(NULL),
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argDef(NULL),
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token(NULL),
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arg(NULL),
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access(Public),
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hasBody(false),
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isInline(false),
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isConst(false),
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isVirtual(false),
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isPure(false),
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isStatic(false),
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isFriend(false),
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isExplicit(false),
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isOperator(false),
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retFuncPtr(false),
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type(Function)
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{
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}
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const Token *tokenDef; // function name token in class definition
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const Token *argDef; // function argument start '(' in class definition
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const Token *token; // function name token in implementation
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const Token *arg; // function argument start '('
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AccessControl access; // public/protected/private
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bool hasBody; // has implementation
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bool isInline; // implementation in class definition
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bool isConst; // is const
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bool isVirtual; // is virtual
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bool isPure; // is pure virtual
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bool isStatic; // is static
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bool isFriend; // is friend
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bool isExplicit; // is explicit
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bool isOperator; // is operator
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bool retFuncPtr; // returns function pointer
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Type type; // constructor, destructor, ...
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};
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class SpaceInfo;
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struct BaseInfo
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{
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AccessControl access; // public/protected/private
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std::string name;
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SpaceInfo *spaceInfo;
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};
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struct FriendInfo
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{
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std::string name;
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SpaceInfo *spaceInfo;
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};
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class SpaceInfo
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{
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public:
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SpaceInfo(CheckClass *check_, const Token *classDef_, SpaceInfo *nestedIn_);
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CheckClass *check;
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bool isNamespace;
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std::string className;
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const Token *classDef; // class/struct/namespace token
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const Token *classStart; // '{' token
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const Token *classEnd; // '}' token
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std::list<Func> functionList;
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std::list<Var> varlist;
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std::vector<BaseInfo> derivedFrom;
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std::list<FriendInfo> friendList;
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SpaceInfo *nestedIn;
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std::list<SpaceInfo *> nestedList;
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AccessControl access;
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unsigned int numConstructors;
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/**
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* @brief assign a variable in the varlist
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* @param varname name of variable to mark assigned
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*/
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void assignVar(const std::string &varname);
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/**
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* @brief initialize a variable in the varlist
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* @param varname name of variable to mark initialized
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*/
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void initVar(const std::string &varname);
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void addVar(const Token *token_, AccessControl access_, bool mutable_, bool static_, bool class_)
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{
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varlist.push_back(Var(token_, varlist.size(), access_, mutable_, static_, class_));
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}
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/**
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* @brief set all variables in list assigned
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*/
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void assignAllVar();
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/**
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* @brief set all variables in list not assigned and not initialized
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*/
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void clearAllVar();
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/** @brief initialize varlist */
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void getVarList();
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/**
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* @brief parse a scope for a constructor or member function and set the "init" flags in the provided varlist
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* @param func reference to the function that should be checked
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* @param callstack the function doesn't look into recursive function calls.
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*/
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void initializeVarList(const Func &func, std::list<std::string> &callstack);
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const Func *getDestructor() const
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{
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std::list<Func>::const_iterator it;
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for (it = functionList.begin(); it != functionList.end(); ++it)
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{
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if (it->type == Func::Destructor)
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return &*it;
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}
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return 0;
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}
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};
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/** @brief Information about all namespaces/classes/structrues */
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std::multimap<std::string, SpaceInfo *> spaceInfoMMap;
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bool argsMatch(const Token *first, const Token *second, const std::string &path, unsigned int depth) const;
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bool isMemberVar(const SpaceInfo *info, const Token *tok);
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bool checkConstFunc(const SpaceInfo *info, const Token *tok);
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const Token *initBaseInfo(SpaceInfo *info, const Token *tok);
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/** @brief check if this function is virtual in the base classes */
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bool isVirtual(const SpaceInfo *info, const Token *functionToken) const;
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// Reporting errors..
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void noConstructorError(const Token *tok, const std::string &classname, bool isStruct);
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void uninitVarError(const Token *tok, const std::string &classname, const std::string &varname);
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void operatorEqVarError(const Token *tok, const std::string &classname, const std::string &varname);
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void unusedPrivateFunctionError(const Token *tok, const std::string &classname, const std::string &funcname);
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void memsetClassError(const Token *tok, const std::string &memfunc);
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void memsetStructError(const Token *tok, const std::string &memfunc, const std::string &classname);
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void operatorEqReturnError(const Token *tok);
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void virtualDestructorError(const Token *tok, const std::string &Base, const std::string &Derived);
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void thisSubtractionError(const Token *tok);
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void operatorEqRetRefThisError(const Token *tok);
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void operatorEqToSelfError(const Token *tok);
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void checkConstError(const Token *tok, const std::string &classname, const std::string &funcname);
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void checkConstError2(const Token *tok1, const Token *tok2, const std::string &classname, const std::string &funcname);
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void getErrorMessages()
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{
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noConstructorError(0, "classname", false);
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uninitVarError(0, "classname", "varname");
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operatorEqVarError(0, "classname", "");
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unusedPrivateFunctionError(0, "classname", "funcname");
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memsetClassError(0, "memfunc");
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memsetStructError(0, "memfunc", "classname");
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operatorEqReturnError(0);
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virtualDestructorError(0, "Base", "Derived");
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thisSubtractionError(0);
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operatorEqRetRefThisError(0);
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operatorEqToSelfError(0);
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checkConstError(0, "class", "function");
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}
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std::string name() const
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{
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return "Class";
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}
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std::string classInfo() const
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{
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return "Check the code for each class.\n"
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"* Missing constructors\n"
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"* Are all variables initialized by the constructors?\n"
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"* [[CheckMemset|Warn if memset, memcpy etc are used on a class]]\n"
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"* If it's a base class, check that the destructor is virtual\n"
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"* Are there unused private functions\n"
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"* 'operator=' should return reference to self\n"
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"* 'operator=' should check for assignment to self\n"
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"* Constness for member functions\n";
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}
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif
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