454 lines
15 KiB
C++
454 lines
15 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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#include "cppcheck.h"
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#include "preprocessor.h" // preprocessor.
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#include "tokenize.h" // <- Tokenizer
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#include "checkfunctionusage.h"
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#include "filelister.h"
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#include "check.h"
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#include <algorithm>
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#include <iostream>
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#include <sstream>
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#include <cstring>
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#include <fstream>
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#include <map>
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#include <stdexcept>
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//---------------------------------------------------------------------------
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CppCheck::CppCheck(ErrorLogger &errorLogger)
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{
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_errorLogger = &errorLogger;
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}
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CppCheck::~CppCheck()
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{
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}
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void CppCheck::settings(const Settings &settings)
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{
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_settings = settings;
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}
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void CppCheck::addFile(const std::string &path)
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{
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FileLister::RecursiveAddFiles(_filenames, path.c_str(), true);
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}
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void CppCheck::addFile(const std::string &path, const std::string &content)
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{
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_filenames.push_back(path);
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_fileContents[ path ] = content;
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}
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void CppCheck::clearFiles()
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{
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_filenames.clear();
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_fileContents.clear();
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}
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std::string CppCheck::parseFromArgs(int argc, const char* const argv[])
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{
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std::vector<std::string> pathnames;
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bool showHelp = false;
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for (int i = 1; i < argc; i++)
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{
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if (strcmp(argv[i], "--version") == 0)
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return "Cppcheck 1.32\n";
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// Flag used for various purposes during debugging
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if (strcmp(argv[i], "--debug") == 0)
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_settings._debug = true;
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// Show all messages
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else if (strcmp(argv[i], "-a") == 0 || strcmp(argv[i], "--all") == 0)
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_settings._showAll = true;
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// Only print something when there are errors
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else if (strcmp(argv[i], "-q") == 0 || strcmp(argv[i], "--quiet") == 0)
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_settings._errorsOnly = true;
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// Checking coding style
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else if (strcmp(argv[i], "-s") == 0 || strcmp(argv[i], "--style") == 0)
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_settings._checkCodingStyle = true;
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// Verbose error messages (configuration info)
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else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0)
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_settings._verbose = true;
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// Force checking of files that have "too many" configurations
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else if (strcmp(argv[i], "-f") == 0 || strcmp(argv[i], "--force") == 0)
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_settings._force = true;
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// Write results in results.xml
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else if (strcmp(argv[i], "--xml") == 0)
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_settings._xml = true;
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// Check if there are unused functions
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else if (strcmp(argv[i], "--unused-functions") == 0)
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_settings._unusedFunctions = true;
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// Print help
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else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
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{
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pathnames.clear();
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_filenames.clear();
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showHelp = true;
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break;
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}
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// --error-exitcode=1
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else if (strncmp(argv[i], "--error-exitcode=", 17) == 0)
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{
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std::string temp = argv[i];
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temp = temp.substr(17);
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std::istringstream iss(temp);
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if (!(iss >> _settings._exitCode))
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{
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_settings._exitCode = 0;
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return "cppcheck: Argument must be an integer. Try something like '--error-exitcode=1'\n";
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}
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}
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// Include paths
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else if (strcmp(argv[i], "-I") == 0 || strncmp(argv[i], "-I", 2) == 0)
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{
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std::string path;
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// "-I path/"
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if (strcmp(argv[i], "-I") == 0)
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{
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++i;
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if (i >= argc)
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return "cppcheck: argument to '-I' is missing\n";
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path = argv[i];
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}
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// "-Ipath/"
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else
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{
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path = argv[i];
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path = path.substr(2);
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}
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// If path doesn't end with / or \, add it
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if (path[path.length()-1] != '/' && path[path.length()-1] != '\\')
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path += '/';
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_includePaths.push_back(path);
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}
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// Include paths
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else if (strcmp(argv[i], "-j") == 0 ||
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strncmp(argv[i], "-j", 2) == 0)
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{
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std::string numberString;
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// "-j 3"
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if (strcmp(argv[i], "-j") == 0)
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{
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++i;
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if (i >= argc)
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return "cppcheck: argument to '-j' is missing\n";
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numberString = argv[i];
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}
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// "-j3"
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else if (strncmp(argv[i], "-j", 2) == 0)
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{
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numberString = argv[i];
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numberString = numberString.substr(2);
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}
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std::istringstream iss(numberString);
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if (!(iss >> _settings._jobs))
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return "cppcheck: argument to '-j' is not a number\n";
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if (_settings._jobs > 1000)
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{
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return "cppcheck: argument for '-j' is allowed to be 1000 at max\n";
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}
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}
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// auto deallocated classes..
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else if (strcmp(argv[i], "--auto-dealloc") == 0)
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{
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++i;
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if (i >= argc || !strstr(argv[i], ".lst"))
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return "No .lst file specified for the --auto-dealloc option\n";
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std::ifstream f(argv[i]);
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if (!f.is_open())
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return "couldn't open the file \"" + std::string(argv[i+1]) + "\"\n";
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_settings.autoDealloc(f);
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}
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else if (strncmp(argv[i], "-", 1) == 0 || strncmp(argv[i], "--", 2) == 0)
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{
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return "cppcheck: error: unrecognized command line option \"" + std::string(argv[i]) + "\"\n";
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}
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else
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pathnames.push_back(argv[i]);
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}
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if (pathnames.size() > 0)
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{
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// Execute RecursiveAddFiles() to each given file parameter
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std::vector<std::string>::const_iterator iter;
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for (iter = pathnames.begin(); iter != pathnames.end(); iter++)
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FileLister::RecursiveAddFiles(_filenames, iter->c_str(), true);
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}
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if (argc <= 1 || showHelp)
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{
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std::ostringstream oss;
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oss << "Cppcheck - A tool for static C/C++ code analysis\n"
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"\n"
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"Syntax:\n"
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" cppcheck [--all] [--auto-dealloc file.lst] [--error-exitcode=[n]] [--force]\n"
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" [--help] [-Idir] [-j [jobs]] [--quiet] [--style] [--unused-functions]\n"
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" [--verbose] [--version] [--xml] [file or path1] [file or path] ...\n"
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"\n"
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"If path is given instead of filename, *.cpp, *.cxx, *.cc, *.c++ and *.c files\n"
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"are checked recursively from given directory.\n\n"
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"Options:\n"
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" -a, --all Make the checking more sensitive. More bugs are\n"
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" detected, but there are also more false positives\n"
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" --auto-dealloc file Suppress warnings about classes that have automatic\n"
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" deallocation.\n"
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" The classnames must be provided in plain text - one\n"
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" classname / line - in a .lst file.\n"
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" This option can be used several times, allowing you to\n"
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" specify several .lst files.\n"
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" --error-exitcode=[n] If errors are found, integer [n] is returned instead\n"
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" of default 0. EXIT_FAILURE is returned\n"
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" if arguments are not valid or if no input files are\n"
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" provided. Note that your operating system can\n"
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" modify this value, e.g. 256 can become 0.\n"
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" -f, --force Force checking on files that have \"too many\"\n"
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" configurations\n"
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" -h, --help Print this help\n"
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" -I [dir] Give include path. Give several -I parameters to give\n"
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" several paths. First given path is checked first. If\n"
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" paths are relative to source files, this is not needed\n"
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" -j [jobs] Start [jobs] threads to do the checking simultaneously.\n"
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" -q, --quiet Only print error messages\n"
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" -s, --style Check coding style\n"
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" --unused-functions Check if there are unused functions\n"
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" -v, --verbose More detailed error reports\n"
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" --version Print out version number\n"
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" --xml Write results in xml to error stream.\n"
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"\n"
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"Example usage:\n"
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" # Recursively check the current folder. Print the progress on the screen and\n"
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" write errors in a file:\n"
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" cppcheck . 2> err.txt\n"
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" # Recursively check ../myproject/ and print only most fatal errors:\n"
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" cppcheck --quiet ../myproject/\n"
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" # Check only files one.cpp and two.cpp and give all information there is:\n"
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" cppcheck -v -a -s one.cpp two.cpp\n"
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" # Check f.cpp and search include files from inc1/ and inc2/:\n"
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" cppcheck -I inc1/ -I inc2/ f.cpp\n";
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return oss.str();
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}
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else if (_filenames.empty())
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{
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return "cppcheck: No C or C++ source files found.\n";
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}
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return "";
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}
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unsigned int CppCheck::check()
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{
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_checkFunctionUsage.setErrorLogger(this);
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std::sort(_filenames.begin(), _filenames.end());
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for (unsigned int c = 0; c < _filenames.size(); c++)
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{
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_errout.str("");
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std::string fname = _filenames[c];
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if (_settings._errorsOnly == false)
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_errorLogger->reportOut(std::string("Checking ") + fname + std::string("..."));
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try
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{
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Preprocessor preprocessor;
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std::list<std::string> configurations;
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std::string filedata = "";
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if (_fileContents.size() > 0 && _fileContents.find(_filenames[c]) != _fileContents.end())
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{
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// File content was given as a string
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std::istringstream iss(_fileContents[ _filenames[c] ]);
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preprocessor.preprocess(iss, filedata, configurations, fname, _includePaths);
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}
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else
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{
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// Only file name was given, read the content from file
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std::ifstream fin(fname.c_str());
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preprocessor.preprocess(fin, filedata, configurations, fname, _includePaths);
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}
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int checkCount = 0;
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for (std::list<std::string>::const_iterator it = configurations.begin(); it != configurations.end(); ++it)
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{
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// Check only 12 first configurations, after that bail out, unless --force
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// was used.
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if (!_settings._force && checkCount > 11)
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{
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if (_settings._errorsOnly == false)
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_errorLogger->reportOut(std::string("Bailing out from checking ") + fname + ": Too many configurations. Recheck this file with --force if you want to check them all.");
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break;
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}
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cfg = *it;
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std::string codeWithoutCfg = Preprocessor::getcode(filedata, *it, fname, _errorLogger);
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// If only errors are printed, print filename after the check
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if (_settings._errorsOnly == false && it != configurations.begin())
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_errorLogger->reportOut(std::string("Checking ") + fname + ": " + cfg + std::string("..."));
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checkFile(codeWithoutCfg, _filenames[c].c_str());
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++checkCount;
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}
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}
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catch (std::runtime_error &e)
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{
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// Exception was thrown when checking this file..
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_errorLogger->reportOut("Bailing out from checking " + fname + ": " + e.what());
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}
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_errorLogger->reportStatus(c + 1, _filenames.size());
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}
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// This generates false positives - especially for libraries
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_settings._verbose = false;
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if (_settings._unusedFunctions)
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{
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_errout.str("");
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if (_settings._errorsOnly == false)
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_errorLogger->reportOut("Checking usage of global functions (this may take several minutes)..");
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_checkFunctionUsage.check();
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}
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unsigned int result = static_cast<unsigned int>(_errorList.size());
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_errorList.clear();
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return result;
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}
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//---------------------------------------------------------------------------
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// CppCheck - A function that checks a specified file
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//---------------------------------------------------------------------------
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void CppCheck::checkFile(const std::string &code, const char FileName[])
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{
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Tokenizer _tokenizer(_settings, this);
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// Tokenize the file
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{
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std::istringstream istr(code);
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if (!_tokenizer.tokenize(istr, FileName))
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{
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// File had syntax errors, abort
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return;
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}
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}
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// Set variable id
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_tokenizer.setVarId();
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_tokenizer.fillFunctionList();
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// call all "runChecks" in all registered Check classes
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for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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(*it)->runChecks(&_tokenizer, &_settings, this);
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}
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_tokenizer.simplifyTokenList();
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if (_settings._unusedFunctions)
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_checkFunctionUsage.parseTokens(_tokenizer);
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// call all "runSimplifiedChecks" in all registered Check classes
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for (std::list<Check *>::iterator it = Check::instances().begin(); it != Check::instances().end(); ++it)
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{
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(*it)->runSimplifiedChecks(&_tokenizer, &_settings, this);
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}
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}
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Settings CppCheck::settings() const
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{
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return _settings;
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}
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//---------------------------------------------------------------------------
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void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
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{
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std::string errmsg = msg.toText();
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// Alert only about unique errors
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if (std::find(_errorList.begin(), _errorList.end(), errmsg) != _errorList.end())
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return;
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_errorList.push_back(errmsg);
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std::string errmsg2(errmsg);
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if (_settings._verbose)
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{
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errmsg2 += "\n Defines=\'" + cfg + "\'\n";
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}
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_errorLogger->reportErr(msg);
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_errout << errmsg2 << std::endl;
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}
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void CppCheck::reportOut(const std::string & /*outmsg*/)
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{
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// This is currently never called. It is here just to comply with
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// the interface.
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}
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const std::vector<std::string> &CppCheck::filenames() const
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{
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return _filenames;
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}
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void CppCheck::reportStatus(unsigned int /*index*/, unsigned int /*max*/)
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{
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}
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