149 lines
4.3 KiB
C++
149 lines
4.3 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2010 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 "mainwindow.h"
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#include "ui_mainwindow.h"
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#include "preprocessor.h"
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#include "tokenize.h"
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#include <fstream>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <set>
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#include <QFileDialog>
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static void arrayIndex(const Tokenizer &tokenizer, std::set<unsigned int> &errorlines);
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static unsigned char readChar(std::istream &istr)
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{
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unsigned char ch = (unsigned char)istr.get();
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// Handling of newlines..
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if (ch == '\r')
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{
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ch = '\n';
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if ((char)istr.peek() == '\n')
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(void)istr.get();
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}
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return ch;
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}
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent), ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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connect(ui->actionOpen, SIGNAL(triggered()), this, SLOT(open()));
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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}
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void MainWindow::open()
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{
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const std::string fileName = QFileDialog::getOpenFileName(this,
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tr("Open File"),
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"",
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"cpp files (*.cpp)").toStdString();
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if (fileName.empty())
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return;
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setWindowTitle(fileName.c_str());
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Tokenizer tokenizer;
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{
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// Preprocess the file..
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Preprocessor preprocessor;
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std::ifstream fin(fileName.c_str());
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std::string filedata;
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std::list<std::string> configurations;
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std::list<std::string> includePaths;
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preprocessor.preprocess(fin,
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filedata,
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configurations,
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fileName,
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includePaths);
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filedata = Preprocessor::getcode(filedata, "", fileName, NULL, NULL);
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// Tokenize the preprocessed code..
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std::istringstream istr(filedata);
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tokenizer.tokenize(istr, fileName.c_str(), "");
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}
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// Check the tokens..
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std::set<unsigned int> errorlines;
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arrayIndex(tokenizer, errorlines);
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// show report..
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{
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std::ostringstream report;
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std::ifstream fin(fileName.c_str());
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for (unsigned char c = readChar(fin); fin.good(); c = readChar(fin))
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{
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if (c & 0x80)
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continue;
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report << c;
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}
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ui->codeEditor->setPlainText(QString::fromStdString(report.str()));
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QList<int> errorLines;
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for (std::set<unsigned int>::const_iterator it = errorlines.begin(); it != errorlines.end(); ++it)
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errorLines.push_back(*it);
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ui->codeEditor->highlightErrors(errorLines);
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}
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}
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/**
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* Check that array indexes are within bounds
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* 1. Locate array access through: [ .. ]
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* 2. Try to determine if index is within bounds.
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* 3. If it fails to determine that the index is within bounds then write warning
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* \param tokenizer The tokenizer
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* \param errout output stream to write warnings to
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*/
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static void arrayIndex(const Tokenizer &tokenizer, std::set<unsigned int> &errorlines)
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{
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for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
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{
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// 1. Locate array access through: [ .. ]
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if (tok->fileIndex() == 0 && tok->str() == "[")
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{
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// 2. try to determine if the array index is within bounds
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// array declaration
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if (Token::simpleMatch(tok, "[ ]"))
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continue;
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if (Token::Match(tok->tokAt(-2), "%type% %var% [ %num% ] ;|="))
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continue;
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// 3. If it fails to determine that the index is within bounds then write warning
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errorlines.insert(tok->linenr());
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}
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}
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}
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