608 lines
17 KiB
C++
608 lines
17 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2012 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 SymbolDatabaseH
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#define SymbolDatabaseH
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//---------------------------------------------------------------------------
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#include <string>
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#include <list>
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#include <vector>
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#include <set>
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#include "token.h"
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#include "mathlib.h"
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class Tokenizer;
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class Settings;
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class ErrorLogger;
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class Scope;
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class SymbolDatabase;
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/**
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* @brief Access control enumerations.
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*/
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enum AccessControl { Public, Protected, Private, Global, Namespace, Argument, Local, Throw };
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/**
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* @brief Array dimension information.
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*/
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struct Dimension {
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Dimension() : start(NULL), end(NULL), num(0) { }
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const Token *start; // size start token
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const Token *end; // size end token
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MathLib::bigint num; // dimension length when size is a number, 0 if not known
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};
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/** @brief Information about a member variable. */
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class Variable {
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/** @brief flags mask used to access specific bit. */
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enum {
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fIsMutable = (1 << 0), /** @brief mutable variable */
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fIsStatic = (1 << 1), /** @brief static variable */
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fIsConst = (1 << 2), /** @brief const variable */
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fIsClass = (1 << 3), /** @brief user defined type */
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fIsArray = (1 << 4), /** @brief array variable */
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fIsPointer = (1 << 5), /** @brief pointer variable */
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fIsReference = (1 << 6), /** @brief reference variable */
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fHasDefault = (1 << 7) /** @brief function argument with default value */
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};
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/**
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* Get specified flag state.
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* @param flag_ flag to get state of
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* @return true if flag set or false in flag not set
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*/
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bool getFlag(int flag_) const {
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return bool((_flags & flag_) != 0);
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}
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/**
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* Set specified flag state.
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* @param flag_ flag to set state
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* @param state_ new state of flag
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*/
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void setFlag(int flag_, bool state_) {
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_flags = state_ ? _flags | flag_ : _flags & ~flag_;
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}
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/**
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* @brief parse and save array dimension information
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* @param dimensions array dimensions vector
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* @param tok the first '[' token of array declaration
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* @return true if array, false if not
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*/
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static bool arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok);
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public:
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Variable(const Token *name_, const Token *start_, const Token *end_,
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std::size_t index_, AccessControl access_, const Scope *type_,
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const Scope *scope_)
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: _name(name_),
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_start(start_),
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_end(end_),
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_index(index_),
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_access(access_),
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_flags(0),
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_type(type_),
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_scope(scope_) {
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evaluate();
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}
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/**
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* Get name token.
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* @return name token
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*/
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const Token *nameToken() const {
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return _name;
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}
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/**
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* Get type start token.
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* @return type start token
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*/
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const Token *typeStartToken() const {
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return _start;
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}
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/**
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* Get type end token.
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* @return type end token
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*/
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const Token *typeEndToken() const {
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return _end;
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}
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/**
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* Get name string.
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* @return name string
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*/
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const std::string &name() const {
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static const std::string noname;
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// name may not exist for function arguments
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if (_name)
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return _name->str();
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return noname;
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}
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/**
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* Get variable ID.
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* @return variable ID
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*/
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unsigned int varId() const {
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// name may not exist for function arguments
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if (_name)
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return _name->varId();
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return 0;
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}
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/**
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* Get index of variable in declared order.
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* @return varaible index
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*/
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std::size_t index() const {
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return _index;
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}
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/**
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* Is variable public.
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* @return true if public, false if not
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*/
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bool isPublic() const {
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return _access == Public;
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}
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/**
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* Is variable protected.
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* @return true if protected, false if not
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*/
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bool isProtected() const {
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return _access == Protected;
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}
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/**
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* Is variable private.
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* @return true if private, false if not
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*/
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bool isPrivate() const {
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return _access == Private;
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}
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/**
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* Is variable global.
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* @return true if global, false if not
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*/
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bool isGlobal() const {
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return _access == Global;
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}
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/**
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* Is variable in a namespace.
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* @return true if in a namespace, false if not
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*/
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bool isNamespace() const {
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return _access == Namespace;
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}
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/**
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* Is variable a function argument.
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* @return true if a function argument, false if not
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*/
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bool isArgument() const {
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return _access == Argument;
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}
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/**
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* Is variable local.
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* @return true if local, false if not
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*/
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bool isLocal() const {
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return _access == Local;
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}
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/**
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* Is variable mutable.
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* @return true if mutable, false if not
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*/
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bool isMutable() const {
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return getFlag(fIsMutable);
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}
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/**
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* Is variable static.
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* @return true if static, false if not
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*/
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bool isStatic() const {
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return getFlag(fIsStatic);
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}
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/**
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* Is variable const.
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* @return true if const, false if not
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*/
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bool isConst() const {
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return getFlag(fIsConst);
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}
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/**
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* Is variable a throw type.
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* @return true if throw type, false if not
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*/
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bool isThrow() const {
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return _access == Throw;
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}
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/**
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* Is variable a user defined (or unknown) type.
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* @return true if user defined type, false if not
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*/
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bool isClass() const {
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return getFlag(fIsClass);
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}
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/**
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* Is variable an array.
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* @return true if array, false if not
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*/
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bool isArray() const {
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return getFlag(fIsArray);
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}
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/**
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* Is pointer variable.
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* @return true if pointer, false otherwise
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*/
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bool isPointer() const {
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return getFlag(fIsPointer);
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}
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/**
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* Is reference variable.
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* @return true if reference, false otherwise
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*/
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bool isReference() const {
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return getFlag(fIsReference);
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}
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/**
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* Does variable have a default value.
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* @return true if has a default falue, false if not
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*/
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bool hasDefault() const {
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return getFlag(fHasDefault);
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}
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/**
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* Get Scope pointer of known type.
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* @return pointer to type if known, NULL if not known
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*/
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const Scope *type() const {
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return _type;
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}
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/**
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* Get Scope pointer of enclosing scope.
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* @return pointer to enclosing scope
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*/
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const Scope *scope() const {
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return _scope;
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}
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/**
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* Get array dimensions.
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* @return array dimensions vector
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*/
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const std::vector<Dimension> &dimensions() const {
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return _dimensions;
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}
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/**
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* Get array dimension length.
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* @return length of dimension
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*/
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MathLib::bigint dimension(std::size_t index_) const {
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return _dimensions[index_].num;
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}
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private:
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/** @brief variable name token */
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const Token *_name;
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/** @brief variable type start token */
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const Token *_start;
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/** @brief variable type end token */
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const Token *_end;
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/** @brief order declared */
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std::size_t _index;
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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 flags */
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int _flags;
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/** @brief pointer to user defined type info (for known types) */
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const Scope *_type;
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/** @brief pointer to scope this variable is in */
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const Scope *_scope;
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/** @brief array dimensions */
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std::vector<Dimension> _dimensions;
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/** @brief fill in information, depending on Tokens given at instanciation */
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void evaluate();
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};
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class Function {
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public:
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enum Type { eConstructor, eCopyConstructor, eOperatorEqual, eDestructor, eFunction };
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Function()
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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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start(NULL),
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functionScope(NULL),
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type(eFunction),
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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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}
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std::size_t argCount() const {
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return argumentList.size();
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}
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const Variable* getArgumentVar(unsigned int num) const;
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unsigned int initializedArgCount() const;
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void addArguments(const SymbolDatabase *symbolDatabase, const Scope *scope);
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/** @brief check if this function is virtual in the base classes */
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bool isImplicitlyVirtual(bool defaultVal = false) const;
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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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const Token *start; // function start '{'
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Scope *functionScope; // scope of function body
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std::list<Variable> argumentList; // argument list
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Type type; // constructor, destructor, ...
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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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static bool argsMatch(const Scope *info, const Token *first, const Token *second, const std::string &path, unsigned int depth);
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private:
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bool isImplicitlyVirtual_rec(const Scope* scope, bool& safe) const;
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};
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class Scope {
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// let tests access private function for testing
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friend class TestSymbolDatabase;
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public:
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struct BaseInfo {
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std::string name;
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Scope *scope;
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AccessControl access; // public/protected/private
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bool isVirtual;
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};
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struct FriendInfo {
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std::string name;
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Scope *scope;
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};
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enum ScopeType { eGlobal, eClass, eStruct, eUnion, eNamespace, eFunction, eIf, eElse, eElseIf, eFor, eWhile, eDo, eSwitch, eUnconditional, eTry, eCatch };
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enum NeedInitialization { Unknown, True, False };
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Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_);
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Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_, ScopeType type_, const Token *start_);
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SymbolDatabase *check;
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std::string className;
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const Token *classDef; // class/struct/union/namespace token
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const Token *classStart; // '{' token
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const Token *classEnd; // '}' token
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std::list<Function> functionList;
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std::list<Variable> varlist;
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std::vector<BaseInfo> derivedFrom;
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std::list<FriendInfo> friendList;
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Scope *nestedIn;
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std::list<Scope *> nestedList;
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unsigned int numConstructors;
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std::list<const Token *> usingList;
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NeedInitialization needInitialization;
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ScopeType type;
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// function specific fields
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Scope *functionOf; // scope this function belongs to
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Function *function; // function info for this function
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bool isClassOrStruct() const {
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return (type == eClass || type == eStruct);
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}
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bool isLocal() const {
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return (type == eIf || type == eElse || type == eElseIf ||
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type == eFor || type == eWhile || type == eDo ||
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type == eSwitch || type == eUnconditional ||
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type == eTry || type == eCatch);
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}
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/**
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* @brief find if name is in nested list
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* @param name name of nested scope
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*/
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Scope * findInNestedList(const std::string & name);
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/**
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* @brief find if name is in nested list
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* @param name name of nested scope
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*/
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Scope * findInNestedListRecursive(const std::string & name);
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const Scope * findQualifiedScope(const std::string & name) const;
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void addVariable(const Token *token_, const Token *start_,
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const Token *end_, AccessControl access_, const Scope *type_,
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const Scope *scope_) {
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varlist.push_back(Variable(token_, start_, end_, varlist.size(),
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access_,
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type_, scope_));
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}
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const Token *initBaseInfo(const Token *tok);
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/** @brief initialize varlist */
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void getVariableList();
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const Function *getDestructor() const;
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/**
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* @brief get the number of nested scopes that are not functions
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*
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* This returns the number of user defined types (class, struct, union)
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* that are defined in this user defined type or namespace.
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*/
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unsigned int getNestedNonFunctions() const;
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bool hasDefaultConstructor() const;
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AccessControl defaultAccess() const;
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/**
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* @brief check if statement is variable declaration and add it if it is
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* @param tok pointer to start of statement
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* @param varaccess access control of statement
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* @return pointer to last token
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*/
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const Token *checkVariable(const Token *tok, AccessControl varaccess);
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/**
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* @brief get variable from name
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* @param varname name of variable
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* @return pointer to variable
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*/
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const Variable *getVariable(const std::string &varname) const;
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private:
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/**
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* @brief helper function for getVariableList()
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* @param tok pointer to token to check
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* @param vartok populated with pointer to the variable token, if found
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* @param typetok populated with pointer to the type token, if found
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* @param isArray reference to variable to set if array is found
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* @param isPointer reference to variable to set if pointer is found
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* @return true if tok points to a variable declaration, false otherwise
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*/
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bool isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok) const;
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};
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class SymbolDatabase {
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public:
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SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger);
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/** @brief Information about all namespaces/classes/structrues */
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std::list<Scope> scopeList;
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/**
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* @brief find a variable type if it's a user defined type
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* @param start scope to start looking in
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* @param type token containing variable type
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* @return pointer to type if found or NULL if not found
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*/
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const Scope *findVariableType(const Scope *start, const Token *type) const;
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const Scope *findFunctionScopeByToken(const Token *tok) const;
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const Function *findFunctionByToken(const Token *tok) const;
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const Scope* findScopeByName(const std::string& name) const;
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bool isClassOrStruct(const std::string &type) const {
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return bool(classAndStructTypes.find(type) != classAndStructTypes.end());
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}
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const Variable *getVariableFromVarId(unsigned int varId) const {
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return _variableList[varId];
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}
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size_t getVariableListSize() const {
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return _variableList.size();
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}
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/**
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* @brief output a debug message
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*/
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void debugMessage(const Token *tok, const std::string &msg) const;
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void printOut(const char * title = NULL) const;
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void printVariable(const Variable *var, const char *indent) const;
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private:
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// Needed by Borland C++:
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friend class Scope;
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void addClassFunction(Scope **info, const Token **tok, const Token *argStart);
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Function* addGlobalFunctionDecl(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart);
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Function* addGlobalFunction(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart);
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void addNewFunction(Scope **info, const Token **tok);
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bool isFunction(const Token *tok, const Scope* outerScope, const Token **funcStart, const Token **argStart) const;
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/** class/struct types */
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std::set<std::string> classAndStructTypes;
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const Tokenizer *_tokenizer;
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const Settings *_settings;
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ErrorLogger *_errorLogger;
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/** variable symbol table */
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std::vector<const Variable *> _variableList;
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};
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#endif
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