libkomparediff2/src/diffparser.cpp

0001 /*
0002     SPDX-FileCopyrightText: 2002-2004 Otto Bruggeman <otto.bruggeman@home.nl>
0003
0004     SPDX-License-Identifier: GPL-2.0-or-later
0005 */
0006
0007 #include "diffparser.h"
0008
0009 // lib
0010 #include <komparediff2_logging.h>
0011 // Qt
0012 #include <QRegularExpression>
0013
0014 using namespace KompareDiff2;
0015
0016 DiffParser::DiffParser(const ModelList *list, const QStringList &diff)
0017     : ParserBase(list, diff)
0018 {
0019     // The regexps needed for context diff parsing, the rest is the same as in parserbase.cpp
0020     m_contextDiffHeader1.setPattern(QRegularExpression::anchoredPattern(QStringLiteral("\\*\\*\\* ([^\\t]+)(\\t([^\\t]+))?\\n")));
0021     m_contextDiffHeader2.setPattern(QRegularExpression::anchoredPattern(QStringLiteral("--- ([^\\t]+)(\\t([^\\t]+))?\\n")));
0022 }
0023
0024 DiffParser::~DiffParser() = default;
0025
0026 Format DiffParser::determineFormat()
0027 {
0028     qCDebug(KOMPAREDIFF2_LOG) << "Determining the format of the diff Diff" << m_diffLines;
0029
0030     QRegularExpression normalRE(QStringLiteral("[0-9]+[0-9,]*[acd][0-9]+[0-9,]*"));
0031     QRegularExpression unifiedRE(QStringLiteral("^--- "));
0032     QRegularExpression contextRE(QStringLiteral("^\\*\\*\\* "));
0033     QRegularExpression rcsRE(QStringLiteral("^[acd][0-9]+ [0-9]+"));
0034     QRegularExpression edRE(QStringLiteral("^[0-9]+[0-9,]*[acd]"));
0035
0036     for (const QString &diffLine : std::as_const(m_diffLines)) {
0037         qCDebug(KOMPAREDIFF2_LOG) << diffLine;
0038         if (diffLine.indexOf(normalRE, 0) == 0) {
0039             qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from a Normal diff...";
0040             return Normal;
0041         }
0042         if (diffLine.indexOf(unifiedRE, 0) == 0) {
0043             qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from a Unified diff...";
0044             return Unified;
0045         }
0046         if (diffLine.indexOf(contextRE, 0) == 0) {
0047             qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from a Context diff...";
0048             return Context;
0049         }
0050         if (diffLine.indexOf(rcsRE, 0) == 0) {
0051             qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from an RCS diff...";
0052             return RCS;
0053         }
0054         if (diffLine.indexOf(edRE, 0) == 0) {
0055             qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from an ED diff...";
0056             return Ed;
0057         }
0058     }
0059     qCDebug(KOMPAREDIFF2_LOG) << "Difflines are from an unknown diff...";
0060     return UnknownFormat;
0061 }