787 lines
22 KiB
C++
787 lines
22 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 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 <string>
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#include <map>
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#include <list>
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#include <vector>
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#include <set>
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class Token;
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class ErrorLogger;
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class Settings;
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class SymbolDatabase;
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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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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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/** Is the code JAVA/C#. Used for bailouts */
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bool isJavaOrCSharp() const {
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if (_files.size() != 1)
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return false;
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const std::string::size_type pos = _files[0].rfind('.');
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if (pos != std::string::npos)
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return (_files[0].substr(pos) == ".java" ||
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_files[0].substr(pos) == ".cs");
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return false;
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}
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/** Is the code C. Used for bailouts */
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bool isC() const {
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if (_files.empty())
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return false;
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const std::string::size_type pos = _files[0].rfind('.');
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if (pos != std::string::npos)
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return (_files[0].substr(pos) == ".c") || (_files[0].substr(pos) == ".C");
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return false;
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}
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/** Is the code CPP. Used for bailouts */
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bool isCPP() const {
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return !isC() && !isJavaOrCSharp();
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}
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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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* @param preprocessorCondition Set this flag to true if the code is a preprocessor condition. It disables some simplifications
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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,
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const char FileName[],
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const std::string &configuration = "",
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const bool preprocessorCondition = false);
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/**
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* Create tokens from code.
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* The code must be preprocessed first:
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* - multiline strings are not handled.
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* - UTF in the code are not handled.
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* - comments are not handled.
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* @param code input stream for code
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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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/**
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* Delete all tokens in given token list
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* @param tok token list to delete
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*/
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static void deleteTokens(Token *tok);
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/**
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* Deletes dead code between 'begin' and 'end'.
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* In general not everything can be erased, such as:
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* - code after labels;
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* - code outside the scope where the function is called;
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* - code after a change of scope caused by 'switch(...);'
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* instructions, like 'case %any%;' or 'default;'
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* Also, if the dead code contains a 'switch' block
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* and inside it there's a label, the function removes all
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* the 'switch(..)' tokens and every occurrence of 'case %any%; | default;'
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* expression, such as the 'switch' block is reduced to a simple block.
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*
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* @param begin Tokens after this have a possibility to be erased.
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* @param end Tokens before this have a possibility to be erased.
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*/
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static void eraseDeadCode(Token *begin, const Token *end);
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/**
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* Simplify '* & ( %var% ) =' or any combination of '* &' and '()'
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* parentheses around '%var%' to '%var% ='
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*/
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void simplifyMulAndParens(void);
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/**
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* Get parameter name of function
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* @param ftok The token for the function name in a function
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* implementation/declaration
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* @param par parameter number (1,2,3,..)
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* @return if the parameter was found then the parameter name is
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* returned. Otherwise NULL is returned.
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*/
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static const char *getParameterName(const Token *ftok, unsigned int par);
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/**
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* Get file:line for a given token
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* @param tok given token
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* @return location for given token
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*/
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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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/**
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* Get filenames (the sourcefile + the files it include).
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* The first filename is the filename for the sourcefile
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* @return vector with filenames
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*/
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const std::vector<std::string> *getFiles() const;
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/**
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* Get function token by function name
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* @todo better handling of overloaded functions
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* @todo only scan parent scopes
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* @param funcname function name
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*/
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const Token *getFunctionTokenByName(const char funcname[]) const;
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/** get tokens */
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const Token *tokens() const;
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/**
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* get filename for given token
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* @param tok The given token
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* @return filename for the given token
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*/
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std::string file(const Token *tok) const;
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/**
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* get error messages that the tokenizer generate
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*/
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virtual void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings);
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/** Simplify assignment in function call "f(x=g());" => "x=g();f(x);"
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*/
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void simplifyAssignmentInFunctionCall();
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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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/** Insert array size where it isn't given */
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void arraySize();
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/** Simplify labels and 'case|default' syntaxes */
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void simplifyLabelsCaseDefault();
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/** Remove macros in global scope */
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void removeMacrosInGlobalScope();
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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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* \param only_k_r_fpar Only simplify K&R function parameters
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*/
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void simplifyVarDecl(bool only_k_r_fpar);
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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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Token * initVar(Token * tok);
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/**
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* Convert platform dependent types to standard types.
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* 32 bits: size_t -> unsigned long
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* 64 bits: size_t -> unsigned long long
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*/
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void simplifyPlatformTypes();
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/**
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* Collapse compound standard types into a single token.
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* unsigned long long int => long _isUnsigned=true,_isLong=true
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*/
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void simplifyStdType();
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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 compound assignments
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* Example: ";a+=b;" => ";a=a+b;"
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*/
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void simplifyCompoundAssignment();
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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 multiple assignments.
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* Example: "a = b = c = 0;" => "a = 0; b = 0; c = 0;"
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*/
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void simplifyVariableMultipleAssign();
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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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* Special case: 'x = (0 != x);' is removed.
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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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bool simplifyLogicalOperators();
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/**
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* Simplify comma into a semicolon when possible:
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* - "delete a, delete b" => "delete a; delete b;"
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* - "a = 0, b = 0;" => "a = 0; b = 0;"
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* - "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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* @return true if no syntax errors
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*/
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bool 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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/**
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* Utility function for simplifyKnownVariables. Get data about an
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* assigned variable.
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*/
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bool simplifyKnownVariablesGetData(unsigned int varid, Token **_tok2, Token **_tok3, std::string &value, unsigned int &valueVarId, bool &valueIsPointer, bool floatvar);
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/**
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* utility function for simplifyKnownVariables. Perform simplification
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* of a given variable
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*/
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bool simplifyKnownVariablesSimplify(Token **tok2, Token *tok3, unsigned int varid, const std::string &structname, std::string &value, unsigned int valueVarId, bool valueIsPointer, const Token * const valueToken, int indentlevel);
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/** Replace a "goto" with the statements */
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void simplifyGoto();
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/** Simplify redundant code placed after control flow statements :
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* 'return', 'throw', 'goto', 'break' and 'continue'
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*/
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void simplifyFlowControl();
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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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void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno, bool split = false);
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void addtoken(const Token *tok, 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 redundant 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 removeRedundantConditions();
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/**
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* Remove redundant for:
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* "for (x=0;x<1;x++) { }" => "{ x = 1; }"
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*/
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void removeRedundantFor();
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/**
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* Reduces "; ;" to ";", except in "( ; ; )"
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*/
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void removeRedundantSemicolons();
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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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/** Struct initialization */
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void simplifyStructInit();
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/** Struct simplification
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* "struct S { } s;" => "struct S { }; S s;"
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*/
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void simplifyStructDecl();
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/**
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* Remove redundant parenthesis:
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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 simplifyRedundantParenthesis();
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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 templates
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*/
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void simplifyTemplates();
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/**
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* Expand specialized templates : "template<>.."
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* @return names of expanded templates
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*/
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std::set<std::string> simplifyTemplatesExpandSpecialized();
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/**
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* Get template declarations
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* @return list of template declarations
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*/
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std::list<Token *> simplifyTemplatesGetTemplateDeclarations();
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/**
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* Get template instantiations
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* @return list of template instantiations
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*/
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std::list<Token *> simplifyTemplatesGetTemplateInstantiations();
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/**
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* simplify template instantiations (use default argument values)
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* @param templates list of template declarations
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* @param instantiations list of template instantiations
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*/
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void simplifyTemplatesUseDefaultArgumentValues(const std::list<Token *> &templates,
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const std::list<Token *> &instantiations);
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/**
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* Simplify templates : expand all instantiatiations for a template
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* @todo It seems that inner templates should be instantiated recursively
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* @param tok token where the template declaration begins
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* @param used a list of template usages (not necessarily just for this template)
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* @param expandedtemplates all templates that has been expanded so far. The full names are stored.
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*/
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void simplifyTemplatesInstantiate(const Token *tok,
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std::list<Token *> &used,
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std::set<std::string> &expandedtemplates);
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/**
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* Used after simplifyTemplates to perform a little cleanup.
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* Sometimes the simplifyTemplates isn't fully successful and then
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* there are function calls etc with "wrong" syntax.
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*/
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void simplifyTemplates2();
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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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* Simplify while(func() && errno==EINTR)
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*/
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void simplifyErrNoInWhile();
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/**
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* Simplify while(func(f))
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*/
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void simplifyFuncInWhile();
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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 pointer to standard type (C only) */
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void simplifyPointerToStandardType();
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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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* Copy tokens.
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* @param dest destination token where copied tokens will be inserted after
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* @param first first token to copy
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* @param last last token to copy
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* @return new location of last token copied
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*/
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Token *copyTokens(Token *dest, const Token *first, const Token *last);
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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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/**
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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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/** Syntax error */
|
|
void syntaxError(const Token *tok);
|
|
|
|
/** Syntax error. Example: invalid number of ')' */
|
|
void syntaxError(const Token *tok, char c);
|
|
|
|
/**
|
|
* assert that tokens are ok - used during debugging for example
|
|
* to catch problems in simplifyTokenList.
|
|
* @return always true.
|
|
*/
|
|
bool validate() const;
|
|
|
|
/**
|
|
* Remove __declspec()
|
|
*/
|
|
void simplifyDeclspec();
|
|
|
|
/**
|
|
* Remove calling convention
|
|
*/
|
|
void simplifyCallingConvention();
|
|
|
|
/**
|
|
* Remove __attribute__ ((?))
|
|
*/
|
|
void simplifyAttribute();
|
|
|
|
/**
|
|
* Remove keywords "volatile", "inline", "register", and "restrict"
|
|
*/
|
|
void simplifyKeyword();
|
|
|
|
/**
|
|
* Remove __asm
|
|
*/
|
|
void simplifyAsm();
|
|
|
|
/**
|
|
* Simplify bitfields - the field width is removed as we don't use it.
|
|
*/
|
|
void simplifyBitfields();
|
|
|
|
/**
|
|
* Remove __builtin_expect(...), likely(...), and unlikely(...)
|
|
*/
|
|
void simplifyBuiltinExpect();
|
|
|
|
/**
|
|
* Remove unnecessary member qualification
|
|
*/
|
|
void removeUnnecessaryQualification();
|
|
|
|
/**
|
|
* unnecessary member qualification error
|
|
*/
|
|
void unnecessaryQualificationError(const Token *tok, const std::string &qualification);
|
|
|
|
/**
|
|
* Remove Microsoft MFC 'DECLARE_MESSAGE_MAP()'
|
|
*/
|
|
void simplifyMicrosoftMFC();
|
|
|
|
/**
|
|
* Convert Microsoft memory functions
|
|
* CopyMemory(dst, src, len) -> memcpy(dst, src, len)
|
|
* FillMemory(dst, len, val) -> memset(dst, val, len)
|
|
* MoveMemory(dst, src, len) -> memmove(dst, src, len)
|
|
* ZeroMemory(dst, len) -> memset(dst, 0, len)
|
|
*/
|
|
void simplifyMicrosoftMemoryFunctions();
|
|
|
|
/**
|
|
* Convert Microsoft string functions
|
|
* _tcscpy -> strcpy
|
|
*/
|
|
void simplifyMicrosoftStringFunctions();
|
|
|
|
/**
|
|
* Remove Borland code
|
|
*/
|
|
void simplifyBorland();
|
|
|
|
/**
|
|
* Remove Qt signals and slots
|
|
*/
|
|
void simplifyQtSignalsSlots();
|
|
|
|
/**
|
|
* Collapse operator name tokens into single token
|
|
* operator = => operator=
|
|
*/
|
|
void simplifyOperatorName();
|
|
|
|
/**
|
|
* This will return a short name describing function parameters
|
|
* e.g. parameters: (int a, char b) should get name "int,char,".
|
|
* This should help to identify functions with the same name,
|
|
* but with different parameters.
|
|
* @param start The "(" token
|
|
* @return, e.g. "int,char,"
|
|
*/
|
|
static std::string getNameForFunctionParams(const Token *start);
|
|
|
|
/**
|
|
* check for duplicate enum definition
|
|
*/
|
|
bool duplicateDefinition(Token **tokPtr, const Token *name);
|
|
|
|
/**
|
|
* duplicate enum definition error
|
|
*/
|
|
void duplicateEnumError(const Token *tok1, const Token *tok2, const std::string & type);
|
|
|
|
bool duplicateTypedef(Token **tokPtr, const Token *name, const Token *typeDef, bool undefinedStruct);
|
|
void duplicateTypedefError(const Token *tok1, const Token *tok2, const std::string & type);
|
|
|
|
/**
|
|
* Report error - duplicate declarations
|
|
*/
|
|
void duplicateDeclarationError(const Token *tok1, const Token *tok2, const std::string &type);
|
|
|
|
void unsupportedTypedef(const Token *tok) const;
|
|
|
|
/** Was there templates in the code? */
|
|
bool codeWithTemplates() const {
|
|
return _codeWithTemplates;
|
|
}
|
|
|
|
void setSettings(const Settings *settings) {
|
|
_settings = settings;
|
|
}
|
|
|
|
const SymbolDatabase *getSymbolDatabase() const;
|
|
|
|
Token *deleteInvalidTypedef(Token *typeDef);
|
|
|
|
/**
|
|
* Get variable count.
|
|
* @return number of variables
|
|
*/
|
|
unsigned int varIdCount() const {
|
|
return _varId;
|
|
}
|
|
|
|
/**
|
|
* Simplify e.g. 'return(strncat(temp,"a",1));' into
|
|
* strncat(temp,"a",1); return temp;
|
|
*/
|
|
void simplifyReturn();
|
|
|
|
/**
|
|
* Output list of unknown types.
|
|
*/
|
|
void printUnknownTypes();
|
|
|
|
/** Checks if the file extensions is .c or .C */
|
|
bool code_is_c() const;
|
|
|
|
private:
|
|
/** Disable copy constructor, no implementation */
|
|
Tokenizer(const Tokenizer &);
|
|
|
|
/** Disable assignment operator, no implementation */
|
|
Tokenizer &operator=(const Tokenizer &);
|
|
|
|
/** Token list */
|
|
Token *_tokens, *_tokensBack;
|
|
|
|
/** settings */
|
|
const Settings * _settings;
|
|
|
|
/** errorlogger */
|
|
ErrorLogger * const _errorLogger;
|
|
|
|
/** Symbol database that all checks etc can use */
|
|
mutable SymbolDatabase *_symbolDatabase;
|
|
|
|
/** E.g. "A" for code where "#ifdef A" is true. This is used to
|
|
print additional information in error situations. */
|
|
std::string _configuration;
|
|
|
|
/** sizeof information for known types */
|
|
std::map<std::string, unsigned int> _typeSize;
|
|
|
|
/** filenames for the tokenized source code (source + included) */
|
|
std::vector<std::string> _files;
|
|
|
|
/** variable count */
|
|
unsigned int _varId;
|
|
|
|
/**
|
|
* was there any templates? templates that are "unused" are
|
|
* removed from the token list
|
|
*/
|
|
bool _codeWithTemplates;
|
|
};
|
|
|
|
/// @}
|
|
|
|
//---------------------------------------------------------------------------
|
|
#endif
|