435 lines
11 KiB
C++
435 lines
11 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2009 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 tokenizeH
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#define tokenizeH
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//---------------------------------------------------------------------------
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#include <list>
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#include <string>
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#include <map>
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#include <vector>
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#include "classinfo.h"
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class Token;
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class ErrorLogger;
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class Settings;
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/// @addtogroup Core
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/// @{
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/** @brief The main purpose is to tokenize the source code. It also has functions that simplify the token list */
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class Tokenizer
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{
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private:
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/** Deallocate lists.. */
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void deallocateTokens();
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public:
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Tokenizer();
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Tokenizer(const Settings * settings, ErrorLogger *errorLogger);
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virtual ~Tokenizer();
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/**
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* Tokenize code
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* @param code input stream for code, e.g.
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* \code
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* #file "p.h"
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* class Foo
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* {
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* private:
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* void Bar();
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* };
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*
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* #endfile
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* void Foo::Bar()
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* {
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* }
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* \endcode
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*
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* @param FileName The filename
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* @param configuration E.g. "A" for code where "#ifdef A" is true
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* @return false if Source code contains syntax errors
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*/
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bool tokenize(std::istream &code, const char FileName[], const std::string &configuration = "");
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/**
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* Create tokens from code.
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* @param code input stream for code, same as what tokenize()
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*/
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void createTokens(std::istream &code);
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/** Set variable id */
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void setVarId();
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/**
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* Simplify tokenlist
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*
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* @return false if there is an error that requires aborting
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* the checking of this file.
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*/
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bool simplifyTokenList();
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static void deleteTokens(Token *tok);
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static const char *getParameterName(const Token *ftok, int par);
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std::string fileLine(const Token *tok) const;
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/**
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* Calculates sizeof value for given type.
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* @param type Token which will contain e.g. "int", "*", or string.
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* @return sizeof for given type, or 0 if it can't be calculated.
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*/
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unsigned int sizeOfType(const Token *type) const;
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const std::vector<std::string> *getFiles() const;
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void fillFunctionList();
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const Token *getFunctionTokenByName(const char funcname[]) const;
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const Token *tokens() const;
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std::string file(const Token *tok) const;
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/**
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* Find a class or struct member function
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* @param tok where to begin the search
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* @param classname name of class
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* @param funcname name of function ("~ Fred" => destructor for fred, "%var%" => any function)
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* @param indentlevel Just an integer that you initialize to 0 before the first call.
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* @param isStruct is it a struct
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* @return First matching token or NULL.
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*/
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const Token *findClassFunction(const Token *tok, const char classname[], const char funcname[], int &indentlevel, bool isStruct = false) const;
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/**
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* get error messages
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*/
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virtual void getErrorMessages();
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/**
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* List of classes in currently checked source code and
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* their member functions and member variables.
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*/
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std::map<std::string, ClassInfo> _classInfoList;
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/**
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* Simplify constant calculations such as "1+2" => "3"
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* @return true if modifications to token-list are done.
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* false if no modifications are done.
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*/
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bool simplifyCalculations();
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#ifndef _MSC_VER
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private:
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#endif
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/** Remove redundant assignment */
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void removeRedundantAssignment();
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/**
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* Replace sizeof() to appropriate size.
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*/
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void simplifySizeof();
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/**
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* Simplify variable declarations (split up)
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*/
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void simplifyVarDecl();
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/**
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* Simplify variable initialization
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* ; int *p(0);
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* =>
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* ; int *p = 0;
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*/
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void simplifyInitVar();
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/**
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* insert an "int" after "unsigned" if needed:
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* "unsigned i" => "unsigned int i"
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* "signed int i" => "int i"
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* "signed i" => "int i"
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*/
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void unsignedint();
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/**
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* Simplify question mark - colon operator
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* Example: 0 ? (2/0) : 0 => 0
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* @return true if something is modified
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* false if nothing is done.
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*/
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bool simplifyQuestionMark();
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/**
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* simplify if-assignments..
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* Example: "if(a=b);" => "a=b;if(a);"
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*/
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void simplifyIfAssign();
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/**
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* simplify if-not..
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* Example: "if(0==x);" => "if(!x);"
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*/
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void simplifyIfNot();
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/**
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* simplify if-not NULL..
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* Example: "if(0!=x);" => "if(x);"
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*/
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void simplifyIfNotNull();
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/** @brief simplify if (a) { if (a) .. */
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void simplifyIfSameInnerCondition();
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/**
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* Simplify the "not" and "and" keywords to "!" and "&&"
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* accordingly.
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* Examples:
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* "if (not p)" => "if (!p)"
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* "if (p and q)" => "if (p && q)"
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*/
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void simplifyLogicalOperators();
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/**
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* Simplify comma into a semicolon when possible
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* Example: "delete a, delete b" => "delete a; delete b;"
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* Example: "a = 0, b = 0;" => "a = 0; b = 0;"
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* Example: "return a(), b;" => "a(); return b;"
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*/
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void simplifyComma();
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/** Add braces to an if-block
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*/
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void simplifyIfAddBraces();
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/**
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* Add braces to an do-while block
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*/
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void simplifyDoWhileAddBraces();
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/**
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* typedef A mytype;
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* mytype c;
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*
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* Becomes:
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* typedef A mytype;
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* A c;
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*/
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void simplifyTypedef();
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/**
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* Simplify casts
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*/
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void simplifyCasts();
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/**
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* A simplify function that replaces a variable with its value in cases
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* when the value is known. e.g. "x=10; if(x)" => "x=10;if(10)"
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*
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* @return true if modifications to token-list are done.
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* false if no modifications are done.
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*/
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bool simplifyKnownVariables();
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/** Replace a "goto" with the statements */
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void simplifyGoto();
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/** Expand nested strcat() calls. */
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void simplifyNestedStrcat();
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/** Simplify "if else" */
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void elseif();
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std::vector<const Token *> _functionList;
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void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno);
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/**
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* Simplify the operator "?:"
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*/
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void simplifyConditionOperator();
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/** Simplify conditions
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* @return true if something is modified
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* false if nothing is done.
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*/
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bool simplifyConditions();
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/** Remove reduntant code, e.g. if( false ) { int a; } should be
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* removed, because it is never executed.
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* @return true if something is modified
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* false if nothing is done.
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*/
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bool removeReduntantConditions();
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/** Simplify function calls - constant return value
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* @return true if something is modified
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* false if nothing is done.
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*/
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bool simplifyFunctionReturn();
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/**
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* Remove redundant paranthesis:
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* - "((x))" => "(x)"
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* - "(function())" => "function()"
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* - "(delete x)" => "delete x"
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* - "(delete [] x)" => "delete [] x"
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* @return true if modifications to token-list are done.
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* false if no modifications are done.
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*/
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bool simplifyRedundantParanthesis();
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/** Simplify references */
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void simplifyReference();
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/**
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* Simplify functions like "void f(x) int x; {"
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* into "void f(int x) {"
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*/
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void simplifyFunctionParameters();
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/**
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* Simplify namespaces by removing them, e.g.
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* "namespace b{ void f(){} }" becomes "void f(){}"
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*/
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void simplifyNamespaces();
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/**
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* Simplify templates
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*/
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void simplifyTemplates();
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/**
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* Simplify e.g. 'atol("0")' into '0'
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*/
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void simplifyMathFunctions();
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/**
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* Modify strings in the token list by replacing hex and oct
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* values. E.g. "\x61" -> "a" and "\000" -> "\0"
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* @param source The string to be modified, e.g. "\x61"
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* @return Modified string, e.g. "a"
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*/
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std::string simplifyString(const std::string &source);
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/**
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* Use "<" comparison instead of ">"
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* Use "<=" comparison instead of ">="
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*/
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void simplifyComparisonOrder();
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/**
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* Change "int const x;" into "const int x;"
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*/
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void simplifyConst();
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/**
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* simplify "while (0)"
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*/
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void simplifyWhile0();
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/**
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* Replace enum with constant value
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*/
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void simplifyEnum();
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/**
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* Remove "std::" before some function names
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*/
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void simplifyStd();
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/** Simplify function pointers */
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void simplifyFunctionPointers();
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/**
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* Remove exception specifications. This function calls itself recursively.
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* @param tok First token in scope to cleanup
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*/
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void removeExceptionSpecifications(Token *tok) const;
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void insertTokens(Token *dest, const Token *src, unsigned int n);
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/**
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* Send error message to error logger about internal bug.
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* @param tok the token that this bug concerns.
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*/
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void cppcheckError(const Token *tok) const;
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/**
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* Setup links for tokens so that one can call Token::link().
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*
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* @return false if there was a mismatch with tokens, this
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* should mean that source code was not valid.
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*/
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bool createLinks();
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void syntaxError(const Token *tok, char c);
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/**
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* Update _classInfoList to contain class names and member
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* functions and member variables.
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*/
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void updateClassList();
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/** Disable assignments.. */
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Tokenizer(const Tokenizer &);
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/**
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* assert that tokens are ok - used during debugging for example
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* to catch problems in simplifyTokenList.
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* @return always true.
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*/
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bool validate() const;
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/**
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* Helper function for simplifyDoWhileAddBraces()
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* @param tok This must be a "do" token, which is
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* not followed by "{".
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*/
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bool simplifyDoWhileAddBracesHelper(Token *tok);
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/**
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* This will return a short name describing function parameters
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* e.g. parameters: (int a, char b) should get name "int,char,".
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* This should help to identify functions with the same name,
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* but with different parameters.
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* @param start The "(" token
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* @return, e.g. "int,char,"
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*/
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static std::string getNameForFunctionParams(const Token *start);
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/** Disable assignment operator */
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Tokenizer &operator=(const Tokenizer &);
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Token *_tokens, *_tokensBack;
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std::map<std::string, unsigned int> _typeSize;
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std::vector<std::string> _files;
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const Settings * const _settings;
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ErrorLogger * const _errorLogger;
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/** E.g. "A" for code where "#ifdef A" is true. This is used to
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print additional information in error situations. */
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std::string _configuration;
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif
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