cppcheck/verify/main.cpp

96 lines
2.9 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "preprocessor.h"
#include "tokenize.h"
#include <fstream>
#include <iostream>
#include <sstream>
#include <string>
/**
* Check that array indexes are within bounds
* 1. Locate array access through: [ .. ]
* 2. Try to determine if index is within bounds.
* 3. If it fails to determine that the index is within bounds then write warning
* \param tokenizer The tokenizer
* \param errout output stream to write warnings to
*/
static void arrayIndex(const Tokenizer &tokenizer, std::ostream &errout)
{
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
// 1. Locate array access through: [ .. ]
if (tok->str() == "[")
{
// 2. try to determine if the array index is within bounds
// array declaration
if (Token::simpleMatch(tok, "[ ]"))
continue;
if (Token::Match(tok->tokAt(-2), "%type% %var% [ %num% ] ;|="))
continue;
// 3. If it fails to determine that the index is within bounds then write warning
errout << tokenizer.fileLine(tok)
<< " failed to determine if given array index is within bounds"
<< std::endl;
}
}
}
int main(int argc, const char *argv[])
{
if (argc != 2)
{
std::cerr << "syntax: cppcheck-verify file.cpp" << std::endl;
return 0;
}
const std::string fileName = argv[1];
Tokenizer tokenizer;
{
// Preprocess the file..
Preprocessor preprocessor;
std::ifstream fin(fileName.c_str());
std::string filedata;
std::list<std::string> configurations;
std::list<std::string> includePaths;
preprocessor.preprocess(fin,
filedata,
configurations,
fileName,
includePaths);
filedata = Preprocessor::getcode(filedata, "", fileName, NULL);
// Tokenize the preprocessed code..
std::istringstream istr(filedata);
tokenizer.tokenize(istr, fileName.c_str(), "");
}
// Check the tokens..
arrayIndex(tokenizer, std::cerr);
return 0;
}