243 lines
9.3 KiB
C++
243 lines
9.3 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 preprocessorH
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#define preprocessorH
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//---------------------------------------------------------------------------
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#include <map>
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#include <istream>
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#include <string>
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#include <list>
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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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/**
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* @brief The cppcheck preprocessor.
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* The preprocessor has special functionality for extracting the various ifdef
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* configurations that exist in a source file.
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*/
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class Preprocessor {
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public:
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/**
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* Include file types.
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*/
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enum HeaderTypes {
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NoHeader = 0,
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UserHeader,
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SystemHeader
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};
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Preprocessor(Settings *settings = 0, ErrorLogger *errorLogger = 0);
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static bool missingIncludeFlag;
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/**
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* Extract the code for each configuration
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* @param istr The (file/string) stream to read from.
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* @param result The map that will get the results
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* @param filename The name of the file to check e.g. "src/main.cpp"
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* @param includePaths List of paths where incude files should be searched from,
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* single path can be e.g. in format "include/".
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* There must be a path separator at the end. Default parameter is empty list.
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* Note that if path from given filename is also extracted and that is used as
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* a last include path if include file was not found from earlier paths.
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*/
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void preprocess(std::istream &istr, std::map<std::string, std::string> &result, const std::string &filename, const std::list<std::string> &includePaths = std::list<std::string>());
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/**
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* Extract the code for each configuration. Use this with getcode() to get the
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* file data for each individual configuration.
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*
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* @param srcCodeStream The (file/string) stream to read from.
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* @param processedFile Give reference to empty string as a parameter,
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* function will fill processed file here. Use this also as a filedata parameter
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* to getcode() if you received more than once configurations.
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* @param resultConfigurations List of configurations. Pass these one by one
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* to getcode() with processedFile.
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* @param filename The name of the file to check e.g. "src/main.cpp"
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* @param includePaths List of paths where incude files should be searched from,
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* single path can be e.g. in format "include/".
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* There must be a path separator at the end. Default parameter is empty list.
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* Note that if path from given filename is also extracted and that is used as
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* a last include path if include file was not found from earlier paths.
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*/
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void preprocess(std::istream &srcCodeStream, std::string &processedFile, std::list<std::string> &resultConfigurations, const std::string &filename, const std::list<std::string> &includePaths);
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/** Just read the code into a string. Perform simple cleanup of the code */
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std::string read(std::istream &istr, const std::string &filename, Settings *settings);
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/**
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* Get preprocessed code for a given configuration
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*/
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static std::string getcode(const std::string &filedata, const std::string &cfg, const std::string &filename, const Settings *settings, ErrorLogger *errorLogger);
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/**
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* simplify condition
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* @param variables Variable values
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* @param condition The condition to simplify
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* @param match if true, 'defined(A)' is replaced with 0 if A is not defined
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*/
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static void simplifyCondition(const std::map<std::string, std::string> &variables, std::string &condition, bool match);
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/**
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* preprocess all whitespaces
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* @param processedFile The data to be processed
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*/
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static void preprocessWhitespaces(std::string &processedFile);
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protected:
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/**
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* report error
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* @param fileName name of file that the error was found in
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* @param linenr linenr in file
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* @param errorLogger Error logger to write error to
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* @param errorType id string for error
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* @param errorText Plain text
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*/
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static void writeError(const std::string &fileName, const unsigned int linenr, ErrorLogger *errorLogger, const std::string &errorType, const std::string &errorText);
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/**
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* Replace "#if defined" with "#ifdef" where possible
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*
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* @param str The string to be converted
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* @return The replaced string
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*/
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static std::string replaceIfDefined(const std::string &str);
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/**
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* expand macros in code. ifdefs etc are ignored so the code must be a single configuration
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* @param code The input code
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* @param filename filename of source file
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* @param errorLogger Error logger to write errors to (if any)
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* @return the expanded string
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*/
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static std::string expandMacros(const std::string &code, std::string filename, ErrorLogger *errorLogger);
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/**
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* Remove comments from code. This should only be called from read().
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* @param str Code processed by read().
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* @param filename filename
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* @param settings Settings. If there are inline suppressions these will be added to the settings
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* @return code without comments
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*/
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std::string removeComments(const std::string &str, const std::string &filename, Settings *settings);
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/**
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* Cleanup 'if 0' from the code
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* @param code Code processed by read().
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* @return code without 'if 0'
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*/
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static std::string removeIf0(const std::string &code);
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/**
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* Remove redundant parentheses from preprocessor commands. This should only be called from read().
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* @param str Code processed by read().
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* @return code with reduced parentheses
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*/
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static std::string removeParentheses(const std::string &str);
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/**
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* clean up #-preprocessor lines (only)
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* @param processedFile The data to be processed
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*/
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std::string preprocessCleanupDirectives(const std::string &processedFile) const;
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/**
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* Returns the string between double quote characters or \< \> characters.
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* @param str e.g. \code#include "menu.h"\endcode or \code#include <menu.h>\endcode
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* After function call it will contain e.g. "menu.h" without double quotes.
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* @return NoHeader empty string if double quotes or \< \> were not found.
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* UserHeader if file surrounded with "" was found
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* SystemHeader if file surrounded with \<\> was found
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*/
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static Preprocessor::HeaderTypes getHeaderFileName(std::string &str);
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private:
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/**
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* Remove space that has new line character on left or right side of it.
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*
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* @param str The string to be converted
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* @return The string where space characters have been removed.
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*/
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static std::string removeSpaceNearNL(const std::string &str);
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/**
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* Get all possible configurations sorted in alphabetical order.
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* By looking at the ifdefs and ifndefs in filedata
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*/
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std::list<std::string> getcfgs(const std::string &filedata, const std::string &filename);
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static std::string getdef(std::string line, bool def);
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public:
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/**
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* Remove asm(...) from a string
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* @param str Code
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*/
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static void removeAsm(std::string &str);
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/**
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* Evaluate condition 'numerically'
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* @param cfg configuration
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* @param def condition
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* @return result when evaluating the condition
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*/
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static bool match_cfg_def(const std::map<std::string, std::string> &cfg, std::string def);
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static void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings);
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private:
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void missingInclude(const std::string &filename, unsigned int linenr, const std::string &header, bool userheader);
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void error(const std::string &filename, unsigned int linenr, const std::string &msg);
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/**
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* Search includes from code and append code from the included
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* file
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* @param code The source code to modify
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* @param filePath Relative path to file to check e.g. "src/main.cpp"
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* @param includePaths List of paths where incude files should be searched from,
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* single path can be e.g. in format "include/".
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* There must be a path separator at the end. Default parameter is empty list.
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* Note that if path from given filename is also extracted and that is used as
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* a last include path if include file was not found from earlier paths.
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* @return modified source code
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*/
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void handleIncludes(std::string &code, const std::string &filePath, const std::list<std::string> &includePaths);
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Settings *_settings;
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ErrorLogger *_errorLogger;
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/** filename for cpp/c file - useful when reporting errors */
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std::string file0;
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif
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