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https://bitbucket.org/librepilot/librepilot.git
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262 lines
11 KiB
C++
262 lines
11 KiB
C++
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/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "filesearch.h"
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#include <cctype>
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#include <QtCore/QIODevice>
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#include <QtCore/QBuffer>
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#include <QtCore/QFile>
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#include <QtCore/QFutureInterface>
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#include <QtCore/QtConcurrentRun>
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#include <QtCore/QRegExp>
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#include <QtCore/QCoreApplication>
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#include <qtconcurrent/runextensions.h>
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using namespace Utils;
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static inline QString msgCanceled(const QString &searchTerm, int numMatches, int numFilesSearched)
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{
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return QCoreApplication::translate("Utils::FileSearch",
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"%1: canceled. %n occurrences found in %2 files.",
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0, QCoreApplication::CodecForTr, numMatches).
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arg(searchTerm).arg(numFilesSearched);
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}
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static inline QString msgFound(const QString &searchTerm, int numMatches, int numFilesSearched)
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{
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return QCoreApplication::translate("Utils::FileSearch",
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"%1: %n occurrences found in %2 files.",
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0, QCoreApplication::CodecForTr, numMatches).
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arg(searchTerm).arg(numFilesSearched);
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}
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static inline QString msgFound(const QString &searchTerm, int numMatches, int numFilesSearched, int filesSize)
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{
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return QCoreApplication::translate("Utils::FileSearch",
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"%1: %n occurrences found in %2 of %3 files.",
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0, QCoreApplication::CodecForTr, numMatches).
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arg(searchTerm).arg(numFilesSearched).arg(filesSize);
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}
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namespace {
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void runFileSearch(QFutureInterface<FileSearchResult> &future,
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QString searchTerm,
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QStringList files,
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QTextDocument::FindFlags flags,
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QMap<QString, QString> fileToContentsMap)
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{
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future.setProgressRange(0, files.size());
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int numFilesSearched = 0;
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int numMatches = 0;
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bool caseInsensitive = !(flags & QTextDocument::FindCaseSensitively);
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bool wholeWord = (flags & QTextDocument::FindWholeWords);
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QByteArray sa = searchTerm.toUtf8();
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int scMaxIndex = sa.length()-1;
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const char *sc = sa.constData();
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QByteArray sal = searchTerm.toLower().toUtf8();
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const char *scl = sal.constData();
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QByteArray sau = searchTerm.toUpper().toUtf8();
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const char *scu = sau.constData();
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int chunkSize = qMax(100000, sa.length());
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QFile file;
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QBuffer buffer;
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foreach (QString s, files) {
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if (future.isPaused())
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future.waitForResume();
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if (future.isCanceled()) {
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future.setProgressValueAndText(numFilesSearched, msgCanceled(searchTerm, numMatches, numFilesSearched));
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break;
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}
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QIODevice *device;
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if (fileToContentsMap.contains(s)) {
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buffer.setData(fileToContentsMap.value(s).toLocal8Bit());
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device = &buffer;
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} else {
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file.setFileName(s);
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device = &file;
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}
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if (!device->open(QIODevice::ReadOnly))
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continue;
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int lineNr = 1;
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const char *startOfLastLine = NULL;
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bool firstChunk = true;
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while (!device->atEnd()) {
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if (!firstChunk)
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device->seek(device->pos()-sa.length()+1);
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const QByteArray chunk = device->read(chunkSize);
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const char *chunkPtr = chunk.constData();
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startOfLastLine = chunkPtr;
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for (const char *regionPtr = chunkPtr; regionPtr < chunkPtr + chunk.length()-scMaxIndex; ++regionPtr) {
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const char *regionEnd = regionPtr + scMaxIndex;
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if (*regionPtr == '\n') {
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startOfLastLine = regionPtr + 1;
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++lineNr;
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}
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else if (
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// case sensitive
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(!caseInsensitive && *regionPtr == sc[0] && *regionEnd == sc[scMaxIndex])
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// case insensitive
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(caseInsensitive && (*regionPtr == scl[0] || *regionPtr == scu[0])
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&& (*regionEnd == scl[scMaxIndex] || *regionEnd == scu[scMaxIndex]))
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) {
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const char *afterRegion = regionEnd + 1;
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const char *beforeRegion = regionPtr - 1;
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bool equal = true;
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if (wholeWord &&
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( isalnum(*beforeRegion)
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|| (*beforeRegion == '_')
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|| isalnum(*afterRegion)
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|| (*afterRegion == '_'))) {
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equal = false;
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}
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int regionIndex = 1;
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for (const char *regionCursor = regionPtr + 1; regionCursor < regionEnd; ++regionCursor, ++regionIndex) {
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if ( // case sensitive
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(!caseInsensitive && equal && *regionCursor != sc[regionIndex])
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// case insensitive
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(caseInsensitive && equal && *regionCursor != sc[regionIndex] && *regionCursor != scl[regionIndex] && *regionCursor != scu[regionIndex])
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) {
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equal = false;
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}
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}
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if (equal) {
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int textLength = chunk.length() - (startOfLastLine - chunkPtr);
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if (textLength > 0) {
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QByteArray res;
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res.reserve(256);
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int i = 0;
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int n = 0;
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while (startOfLastLine[i] != '\n' && startOfLastLine[i] != '\r' && i < textLength && n++ < 256)
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res.append(startOfLastLine[i++]);
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future.reportResult(FileSearchResult(s, lineNr, QString(res),
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regionPtr - startOfLastLine, sa.length()));
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++numMatches;
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}
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}
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}
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}
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firstChunk = false;
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}
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++numFilesSearched;
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future.setProgressValueAndText(numFilesSearched, msgFound(searchTerm, numMatches, numFilesSearched, files.size()));
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device->close();
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}
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if (!future.isCanceled())
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future.setProgressValueAndText(numFilesSearched, msgFound(searchTerm, numMatches, numFilesSearched));
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}
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void runFileSearchRegExp(QFutureInterface<FileSearchResult> &future,
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QString searchTerm,
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QStringList files,
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QTextDocument::FindFlags flags,
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QMap<QString, QString> fileToContentsMap)
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{
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future.setProgressRange(0, files.size());
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int numFilesSearched = 0;
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int numMatches = 0;
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if (flags & QTextDocument::FindWholeWords)
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searchTerm = QString::fromLatin1("\\b%1\\b").arg(searchTerm);
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const Qt::CaseSensitivity caseSensitivity = (flags & QTextDocument::FindCaseSensitively) ? Qt::CaseSensitive : Qt::CaseInsensitive;
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const QRegExp expression(searchTerm, caseSensitivity);
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QFile file;
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QString str;
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QTextStream stream;
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foreach (const QString &s, files) {
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if (future.isPaused())
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future.waitForResume();
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if (future.isCanceled()) {
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future.setProgressValueAndText(numFilesSearched, msgCanceled(searchTerm, numMatches, numFilesSearched));
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break;
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}
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bool needsToCloseFile = false;
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if (fileToContentsMap.contains(s)) {
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str = fileToContentsMap.value(s);
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stream.setString(&str);
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} else {
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file.setFileName(s);
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if (!file.open(QIODevice::ReadOnly))
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continue;
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needsToCloseFile = true;
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stream.setDevice(&file);
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}
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int lineNr = 1;
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QString line;
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while (!stream.atEnd()) {
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line = stream.readLine();
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int pos = 0;
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while ((pos = expression.indexIn(line, pos)) != -1) {
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future.reportResult(FileSearchResult(s, lineNr, line,
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pos, expression.matchedLength()));
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pos += expression.matchedLength();
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}
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++lineNr;
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}
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++numFilesSearched;
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future.setProgressValueAndText(numFilesSearched, msgFound(searchTerm, numMatches, numFilesSearched, files.size()));
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if (needsToCloseFile)
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file.close();
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}
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if (!future.isCanceled())
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future.setProgressValueAndText(numFilesSearched, msgFound(searchTerm, numMatches, numFilesSearched));
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}
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} // namespace
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QFuture<FileSearchResult> Utils::findInFiles(const QString &searchTerm, const QStringList &files,
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QTextDocument::FindFlags flags, QMap<QString, QString> fileToContentsMap)
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{
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return QtConcurrent::run<FileSearchResult, QString, QStringList, QTextDocument::FindFlags, QMap<QString, QString> >
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(runFileSearch, searchTerm, files, flags, fileToContentsMap);
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}
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QFuture<FileSearchResult> Utils::findInFilesRegExp(const QString &searchTerm, const QStringList &files,
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QTextDocument::FindFlags flags, QMap<QString, QString> fileToContentsMap)
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{
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return QtConcurrent::run<FileSearchResult, QString, QStringList, QTextDocument::FindFlags, QMap<QString, QString> >
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(runFileSearchRegExp, searchTerm, files, flags, fileToContentsMap);
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}
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