119 lines
4.0 KiB
C++
119 lines
4.0 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2023 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 checkunusedfunctionsH
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#define checkunusedfunctionsH
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//---------------------------------------------------------------------------
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#include "check.h"
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#include "config.h"
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#include <list>
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#include <set>
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#include <string>
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#include <unordered_map>
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class ErrorLogger;
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class Function;
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class Settings;
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class Tokenizer;
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namespace CTU {
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class FileInfo;
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}
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/// @addtogroup Checks
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/** @brief Check for functions never called */
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/// @{
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class CPPCHECKLIB CheckUnusedFunctions : public Check {
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public:
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/** @brief This constructor is used when registering the CheckUnusedFunctions */
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CheckUnusedFunctions() : Check(myName()) {}
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/** @brief This constructor is used when running checks. */
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CheckUnusedFunctions(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
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: Check(myName(), tokenizer, settings, errorLogger) {}
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static void clear();
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// Parse current tokens and determine..
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// * Check what functions are used
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// * What functions are declared
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void parseTokens(const Tokenizer &tokenizer, const char FileName[], const Settings *settings);
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// Return true if an error is reported.
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bool check(ErrorLogger * const errorLogger, const Settings& settings) const;
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/** @brief Parse current TU and extract file info */
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Check::FileInfo *getFileInfo(const Tokenizer *tokenizer, const Settings *settings) const override;
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/** @brief Analyse all file infos for all TU */
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bool analyseWholeProgram(const CTU::FileInfo *ctu, const std::list<Check::FileInfo*> &fileInfo, const Settings& settings, ErrorLogger &errorLogger) override;
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std::string analyzerInfo() const;
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/** @brief Combine and analyze all analyzerInfos for all TUs */
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static void analyseWholeProgram(const Settings &settings, ErrorLogger * const errorLogger, const std::string &buildDir);
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private:
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void getErrorMessages(ErrorLogger *errorLogger, const Settings * /*settings*/) const override {
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CheckUnusedFunctions::unusedFunctionError(errorLogger, emptyString, 0, "funcName");
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}
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void runChecks(const Tokenizer & /*tokenizer*/, ErrorLogger * /*errorLogger*/) override {}
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/**
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* Dummy implementation, just to provide error for --errorlist
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*/
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static void unusedFunctionError(ErrorLogger * const errorLogger,
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const std::string &filename, unsigned int lineNumber,
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const std::string &funcname);
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static std::string myName() {
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return "Unused functions";
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}
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std::string classInfo() const override {
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return "Check for functions that are never called\n";
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}
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struct CPPCHECKLIB FunctionUsage {
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std::string filename;
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unsigned int lineNumber{};
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bool usedSameFile{};
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bool usedOtherFile{};
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};
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std::unordered_map<std::string, FunctionUsage> mFunctions;
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class CPPCHECKLIB FunctionDecl {
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public:
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explicit FunctionDecl(const Function *f);
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std::string functionName;
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unsigned int lineNumber;
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};
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std::list<FunctionDecl> mFunctionDecl;
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std::set<std::string> mFunctionCalls;
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};
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/// @}
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//---------------------------------------------------------------------------
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#endif // checkunusedfunctionsH
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