935 lines
23 KiB
C++
935 lines
23 KiB
C++
/* Copyright (c) 2010-2017 Benjamin Dobell, Glass Echidna
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.*/
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#ifdef WIN32
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#pragma warning(disable : 4996)
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#endif
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// C/C++ Standard Library
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#include <stdio.h>
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// zlib
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#include "zlib.h"
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// Qt
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#include <QDateTime>
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#include <QDir>
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#include <QProgressDialog>
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// Heimdall Frontend
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#include "Alerts.h"
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#include "Packaging.h"
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using namespace HeimdallFrontend;
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const qint64 Packaging::kMaxFileSize = 8589934592ll;
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const char *Packaging::ustarMagic = "ustar";
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bool Packaging::ExtractTar(QTemporaryFile& tarFile, PackageData *packageData)
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{
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TarHeader tarHeader;
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if (!tarFile.open())
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{
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Alerts::DisplayError(QString("Error opening temporary TAR archive:\n%1").arg(tarFile.fileName()));
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return (false);
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}
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bool previousEmpty = false;
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QProgressDialog progressDialog("Extracting files...", "Cancel", 0, tarFile.size());
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progressDialog.setWindowModality(Qt::ApplicationModal);
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progressDialog.setWindowTitle("Heimdall Frontend");
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while (!tarFile.atEnd())
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{
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qint64 dataRead = tarFile.read(tarHeader.buffer, TarHeader::kBlockLength);
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if (dataRead != TarHeader::kBlockLength)
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{
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progressDialog.close();
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Alerts::DisplayError("Package's TAR archive is malformed.");
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tarFile.close();
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return (false);
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}
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progressDialog.setValue(tarFile.pos());
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if (progressDialog.wasCanceled())
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{
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tarFile.close();
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progressDialog.close();
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return (false);
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}
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//bool ustarFormat = strcmp(tarHeader.fields.magic, ustarMagic) == 0;
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bool empty = true;
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for (int i = 0; i < TarHeader::kBlockLength; i++)
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{
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if (tarHeader.buffer[i] != 0)
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{
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empty = false;
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break;
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}
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}
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if (empty)
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{
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if (previousEmpty)
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{
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// Two empty blocks in a row means we've reached the end of the archive.
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break;
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}
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}
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else
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{
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int checksum = 0;
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for (char *bufferIndex = tarHeader.buffer; bufferIndex < tarHeader.fields.checksum; bufferIndex++)
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checksum += static_cast<unsigned char>(*bufferIndex);
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checksum += 8 * ' ';
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checksum += static_cast<unsigned char>(tarHeader.fields.typeFlag);
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// Both the TAR and USTAR formats have terrible documentation, it's not clear if the following code is required.
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/*if (ustarFormat)
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{
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for (char *bufferIndex = tarHeader.fields.linkName; bufferIndex < tarHeader.fields.prefix + 155; bufferIndex++)
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checksum += static_cast<unsigned char>(*bufferIndex);
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}*/
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bool parsed = false;
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// The size field is not always null terminated, so we must create a copy and null terminate it for parsing.
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char fileSizeString[13];
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memcpy(fileSizeString, tarHeader.fields.size, 12);
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fileSizeString[12] = '\0';
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qulonglong fileSize = QString(fileSizeString).toULongLong(&parsed, 8);
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if (!parsed)
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{
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progressDialog.close();
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Alerts::DisplayError("Tar header contained an invalid file size.");
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tarFile.close();
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return (false);
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}
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if (fileSize > 0 && tarHeader.fields.typeFlag == '0')
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{
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// We're working with a file.
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QString filename = QString::fromUtf8(tarHeader.fields.name);
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QTemporaryFile *outputFile = new QTemporaryFile("XXXXXX-" + filename);
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packageData->GetFiles().append(outputFile);
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if (!outputFile->open())
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{
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progressDialog.close();
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Alerts::DisplayError(QString("Failed to open output file: \n%1").arg(outputFile->fileName()));
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tarFile.close();
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return (false);
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}
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qulonglong dataRemaining = fileSize;
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char readBuffer[TarHeader::kBlockReadCount * TarHeader::kBlockLength];
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// Copy the file contents from tarFile to outputFile
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while (dataRemaining > 0)
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{
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qint64 fileDataToRead = (dataRemaining < TarHeader::kBlockReadCount * TarHeader::kBlockLength)
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? dataRemaining : TarHeader::kBlockReadCount * TarHeader::kBlockLength;
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qint64 dataRead = tarFile.read(readBuffer, fileDataToRead + (TarHeader::kBlockLength - fileDataToRead % TarHeader::kBlockLength) % TarHeader::kBlockLength);
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if (dataRead < fileDataToRead || dataRead % TarHeader::kBlockLength != 0)
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{
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progressDialog.close();
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Alerts::DisplayError("Unexpected read error whilst extracting package files.");
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tarFile.close();
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outputFile->close();
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remove(outputFile->fileName().toStdString().c_str());
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return (false);
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}
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outputFile->write(readBuffer, fileDataToRead);
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dataRemaining -= fileDataToRead;
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progressDialog.setValue(tarFile.pos());
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if (progressDialog.wasCanceled())
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{
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tarFile.close();
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outputFile->close();
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remove(outputFile->fileName().toStdString().c_str());
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progressDialog.close();
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return (false);
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}
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}
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outputFile->close();
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}
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else
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{
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progressDialog.close();
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Alerts::DisplayError("Heimdall packages shouldn't contain links or directories.");
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tarFile.close();
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return (false);
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}
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}
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previousEmpty = empty;
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}
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progressDialog.close();
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tarFile.close();
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return (true);
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}
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bool Packaging::WriteTarEntry(const QString& filePath, QTemporaryFile *tarFile, const QString& entryFilename)
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{
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TarHeader tarHeader;
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memset(tarHeader.buffer, 0, TarHeader::kBlockLength);
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QFile file(filePath);
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if (!file.open(QFile::ReadOnly))
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{
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Alerts::DisplayError(QString("Failed to open file: \n%1").arg(file.fileName()));
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return (false);
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}
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if (file.size() > Packaging::kMaxFileSize)
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{
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Alerts::DisplayError(QString("File is too large to be packaged:\n%1").arg(file.fileName()));
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return (false);
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}
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QFileInfo qtFileInfo(file);
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QByteArray utfFilename;
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utfFilename = entryFilename.toUtf8();
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if (utfFilename.length() > 100)
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{
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Alerts::DisplayError(QString("File name is too long:\n%1").arg(qtFileInfo.fileName()));
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return (false);
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}
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strcpy(tarHeader.fields.name, utfFilename.constData());
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unsigned int mode = 0;
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QFile::Permissions permissions = file.permissions();
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// Other
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if (permissions.testFlag(QFile::ExeOther))
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mode |= TarHeader::kModeOtherExecute;
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if (permissions.testFlag(QFile::WriteOther))
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mode |= TarHeader::kModeOtherWrite;
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if (permissions.testFlag(QFile::ReadOther))
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mode |= TarHeader::kModeOtherRead;
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// Group
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if (permissions.testFlag(QFile::ExeGroup))
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mode |= TarHeader::kModeGroupExecute;
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if (permissions.testFlag(QFile::WriteGroup))
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mode |= TarHeader::kModeGroupWrite;
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if (permissions.testFlag(QFile::ReadGroup))
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mode |= TarHeader::kModeGroupRead;
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// Owner
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if (permissions.testFlag(QFile::ExeOwner))
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mode |= TarHeader::kModeOwnerExecute;
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if (permissions.testFlag(QFile::WriteOwner))
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mode |= TarHeader::kModeOwnerWrite;
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if (permissions.testFlag(QFile::ReadOwner))
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mode |= TarHeader::kModeOwnerRead;
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sprintf(tarHeader.fields.mode, "%07o", mode);
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// Owner id
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uint id = qtFileInfo.ownerId();
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if (id < 2097151)
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sprintf(tarHeader.fields.userId, "%07o", id);
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else
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sprintf(tarHeader.fields.userId, "%07o", 0);
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// Group id
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id = qtFileInfo.groupId();
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if (id < 2097151)
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sprintf(tarHeader.fields.groupId, "%07o", id);
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else
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sprintf(tarHeader.fields.groupId, "%07o", 0);
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// Note: We don't support base-256 encoding. Support could be added later.
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sprintf(tarHeader.fields.size, "%011llo", file.size());
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sprintf(tarHeader.fields.modifiedTime, "%u", qtFileInfo.lastModified().toTime_t());
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// Regular File
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tarHeader.fields.typeFlag = '0';
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// Calculate checksum
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int checksum = 0;
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memset(tarHeader.fields.checksum, ' ', 8);
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for (int i = 0; i < TarHeader::kTarHeaderLength; i++)
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checksum += static_cast<unsigned char>(tarHeader.buffer[i]);
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sprintf(tarHeader.fields.checksum, "%07o", checksum);
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// Write the header to the TAR file.
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tarFile->write(tarHeader.buffer, TarHeader::kBlockLength);
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char buffer[TarHeader::kBlockWriteCount * TarHeader::kBlockLength];
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qint64 offset = 0;
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while (offset < file.size())
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{
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qint64 dataRead = file.read(buffer, TarHeader::kBlockWriteCount * TarHeader::kBlockLength);
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if (tarFile->write(buffer, dataRead) != dataRead)
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{
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Alerts::DisplayError("Failed to write data to the temporary TAR file.");
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return (false);
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}
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if (dataRead % TarHeader::kBlockLength != 0)
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{
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int remainingBlockLength = TarHeader::kBlockLength - dataRead % TarHeader::kBlockLength;
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memset(buffer, 0, remainingBlockLength);
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if (tarFile->write(buffer, remainingBlockLength) != remainingBlockLength)
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{
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Alerts::DisplayError("Failed to write data to the temporary TAR file.");
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return (false);
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}
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}
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offset += dataRead;
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}
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return (true);
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}
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bool Packaging::CreateTar(const FirmwareInfo& firmwareInfo, QTemporaryFile *tarFile)
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{
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const QList<FileInfo>& fileInfos = firmwareInfo.GetFileInfos();
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QProgressDialog progressDialog("Packaging files...", "Cancel", 0, fileInfos.length() + 2);
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progressDialog.setWindowModality(Qt::ApplicationModal);
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progressDialog.setWindowTitle("Heimdall Frontend");
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QTemporaryFile firmwareXmlFile("XXXXXX-firmware.xml");
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if (!firmwareXmlFile.open())
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{
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progressDialog.close();
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Alerts::DisplayError(QString("Failed to create temporary file: \n%1").arg(firmwareXmlFile.fileName()));
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return (false);
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}
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QXmlStreamWriter xml(&firmwareXmlFile);
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firmwareInfo.WriteXml(xml);
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firmwareXmlFile.close();
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if (!tarFile->open())
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{
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progressDialog.close();
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Alerts::DisplayError(QString("Failed to open file: \n%1").arg(tarFile->fileName()));
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return (false);
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}
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for (int i = 0; i < fileInfos.length(); i++)
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{
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// If the file was already compressed we don't compress it again.
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bool skip = false;
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for (int j = 0; j < i; j++)
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{
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if (fileInfos[i].GetFilename() == fileInfos[j].GetFilename())
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{
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skip = true;
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break;
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}
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}
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if (skip)
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{
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progressDialog.setValue(i);
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continue;
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}
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QString filename = ClashlessFilename(fileInfos, i);
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if (filename == "firmware.xml")
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{
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Alerts::DisplayError("You cannot name your partition files \"firmware.xml\".\nIt is a reserved name.");
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return (false);
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}
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if (!WriteTarEntry(fileInfos[i].GetFilename(), tarFile, filename))
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{
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tarFile->resize(0);
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tarFile->close();
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progressDialog.close();
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return (false);
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}
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progressDialog.setValue(i);
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if (progressDialog.wasCanceled())
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{
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tarFile->resize(0);
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tarFile->close();
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progressDialog.close();
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return (false);
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}
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}
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int lastSlash = firmwareInfo.GetPitFilename().lastIndexOf('/');
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if (lastSlash < 0)
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lastSlash = firmwareInfo.GetPitFilename().lastIndexOf('\\');
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QString pitFilename = ClashlessFilename(fileInfos, firmwareInfo.GetPitFilename().mid(lastSlash + 1));
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if (pitFilename == "firmware.xml")
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{
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Alerts::DisplayError("You cannot name your PIT file \"firmware.xml\".\nIt is a reserved name.");
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return (false);
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}
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if (!WriteTarEntry(firmwareInfo.GetPitFilename(), tarFile, pitFilename))
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{
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tarFile->resize(0);
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tarFile->close();
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return (false);
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}
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progressDialog.setValue(progressDialog.value() + 1);
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if (progressDialog.wasCanceled())
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{
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tarFile->resize(0);
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tarFile->close();
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progressDialog.close();
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return (false);
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}
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if (!WriteTarEntry(firmwareXmlFile.fileName(), tarFile, "firmware.xml"))
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{
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tarFile->resize(0);
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tarFile->close();
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return (false);
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}
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progressDialog.setValue(progressDialog.value() + 1);
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progressDialog.close();
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// Write two empty blocks to signify the end of the archive.
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char emptyEntry[TarHeader::kBlockLength];
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memset(emptyEntry, 0, TarHeader::kBlockLength);
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tarFile->write(emptyEntry, TarHeader::kBlockLength);
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tarFile->write(emptyEntry, TarHeader::kBlockLength);
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tarFile->close();
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return (true);
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}
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bool Packaging::ExtractPackage(const QString& packagePath, PackageData *packageData)
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{
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FILE *compressedPackageFile = fopen(packagePath.toStdString().c_str(), "rb");
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if (!compressedPackageFile)
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{
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Alerts::DisplayError(QString("Failed to open package:\n%1").arg(packagePath));
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return (false);
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}
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fseek(compressedPackageFile, 0, SEEK_END);
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quint64 compressedFileSize = ftell(compressedPackageFile);
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rewind(compressedPackageFile);
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gzFile packageFile = gzdopen(fileno(compressedPackageFile), "rb");
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QTemporaryFile outputTar("XXXXXX.tar");
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if (!outputTar.open())
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{
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Alerts::DisplayError("Failed to open temporary TAR archive.");
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gzclose(packageFile);
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return (false);
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}
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char buffer[kExtractBufferLength];
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int bytesRead;
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quint64 totalBytesRead = 0;
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QProgressDialog progressDialog("Decompressing package...", "Cancel", 0, compressedFileSize);
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progressDialog.setWindowModality(Qt::ApplicationModal);
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progressDialog.setWindowTitle("Heimdall Frontend");
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do
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{
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bytesRead = gzread(packageFile, buffer, kExtractBufferLength);
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if (bytesRead == -1)
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{
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progressDialog.close();
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Alerts::DisplayError("Error decompressing archive.");
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gzclose(packageFile);
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return (false);
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}
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outputTar.write(buffer, bytesRead);
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totalBytesRead += bytesRead;
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progressDialog.setValue(totalBytesRead);
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if (progressDialog.wasCanceled())
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{
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gzclose(packageFile);
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progressDialog.close();
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return (false);
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}
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} while (bytesRead > 0);
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progressDialog.close();
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outputTar.close();
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gzclose(packageFile); // Closes packageFile and compressedPackageFile
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if (!ExtractTar(outputTar, packageData))
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return (false);
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// Find and read firmware.xml
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for (int i = 0; i < packageData->GetFiles().length(); i++)
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{
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QTemporaryFile *file = packageData->GetFiles()[i];
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if (file->fileTemplate() == "XXXXXX-firmware.xml")
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{
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if (!packageData->ReadFirmwareInfo(file))
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{
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packageData->Clear();
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return (false);
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}
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return (true);
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}
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}
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Alerts::DisplayError("firmware.xml is missing from the package.");
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return (false);
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}
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bool Packaging::BuildPackage(const QString& packagePath, const FirmwareInfo& firmwareInfo)
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|
{
|
|
FILE *compressedPackageFile = fopen(packagePath.toStdString().c_str(), "wb");
|
|
|
|
if (!compressedPackageFile)
|
|
{
|
|
Alerts::DisplayError(QString("Failed to create package:\n%1").arg(packagePath));
|
|
return (false);
|
|
}
|
|
|
|
QTemporaryFile tar("XXXXXX.tar");
|
|
|
|
if (!CreateTar(firmwareInfo, &tar))
|
|
{
|
|
fclose(compressedPackageFile);
|
|
remove(packagePath.toStdString().c_str());
|
|
|
|
return (false);
|
|
}
|
|
|
|
if (!tar.open())
|
|
{
|
|
Alerts::DisplayError(QString("Failed to open temporary file: \n%1").arg(tar.fileName()));
|
|
|
|
fclose(compressedPackageFile);
|
|
remove(packagePath.toStdString().c_str());
|
|
|
|
return (false);
|
|
}
|
|
|
|
gzFile packageFile = gzdopen(fileno(compressedPackageFile), "wb");
|
|
|
|
char buffer[kCompressBufferLength];
|
|
qint64 totalBytesRead = 0;
|
|
int bytesRead;
|
|
|
|
QProgressDialog progressDialog("Compressing package...", "Cancel", 0, tar.size());
|
|
progressDialog.setWindowModality(Qt::ApplicationModal);
|
|
progressDialog.setWindowTitle("Heimdall Frontend");
|
|
|
|
do
|
|
{
|
|
bytesRead = tar.read(buffer, kCompressBufferLength);
|
|
|
|
if (bytesRead == -1)
|
|
{
|
|
progressDialog.close();
|
|
Alerts::DisplayError("Error reading temporary TAR file.");
|
|
|
|
gzclose(packageFile);
|
|
remove(packagePath.toStdString().c_str());
|
|
|
|
return (false);
|
|
}
|
|
|
|
if (gzwrite(packageFile, buffer, bytesRead) != bytesRead)
|
|
{
|
|
progressDialog.close();
|
|
Alerts::DisplayError("Error compressing package.");
|
|
|
|
gzclose(packageFile);
|
|
remove(packagePath.toStdString().c_str());
|
|
|
|
return (false);
|
|
}
|
|
|
|
totalBytesRead += bytesRead;
|
|
progressDialog.setValue(totalBytesRead);
|
|
|
|
if (progressDialog.wasCanceled())
|
|
{
|
|
gzclose(packageFile);
|
|
remove(packagePath.toStdString().c_str());
|
|
|
|
progressDialog.close();
|
|
|
|
return (false);
|
|
}
|
|
} while (bytesRead > 0);
|
|
|
|
progressDialog.close();
|
|
|
|
gzclose(packageFile); // Closes packageFile and compressedPackageFile
|
|
|
|
return (true);
|
|
}
|
|
|
|
QString Packaging::ClashlessFilename(const QList<FileInfo>& fileInfos, int fileInfoIndex)
|
|
{
|
|
int lastSlash = fileInfos[fileInfoIndex].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[fileInfoIndex].GetFilename().lastIndexOf('\\');
|
|
|
|
QString filename = fileInfos[fileInfoIndex].GetFilename().mid(lastSlash + 1);
|
|
unsigned int renameIndex = 0;
|
|
|
|
// Check for name clashes
|
|
for (int i = 0; i < fileInfoIndex; i++)
|
|
{
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
QString otherFilename = fileInfos[i].GetFilename().mid(lastSlash + 1);
|
|
|
|
// If the filenames are the same, but the files themselves aren't the same (i.e. not the same path), then rename.
|
|
if (filename == otherFilename && fileInfos[i].GetFilename() != fileInfos[fileInfoIndex].GetFilename())
|
|
renameIndex++;
|
|
}
|
|
|
|
if (renameIndex > 0)
|
|
{
|
|
int lastPeriodIndex = filename.lastIndexOf(QChar('.'));
|
|
QString shortFilename;
|
|
QString fileType;
|
|
|
|
if (lastPeriodIndex >= 0)
|
|
{
|
|
shortFilename = filename.left(lastPeriodIndex);
|
|
fileType = filename.mid(lastPeriodIndex);
|
|
}
|
|
else
|
|
{
|
|
shortFilename = filename;
|
|
}
|
|
|
|
unsigned int renameIndexOffset = 0;
|
|
bool validIndexOffset = true;
|
|
|
|
// Before we append a rename index we must ensure it doesn't produce further collisions.
|
|
for (int i = 0; i < fileInfos.length(); i++)
|
|
{
|
|
int lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
QString otherFilename = fileInfos[i].GetFilename().mid(lastSlash + 1);
|
|
|
|
if (otherFilename.length() > filename.length() + 1)
|
|
{
|
|
QString trimmedOtherFilename = otherFilename.left(shortFilename.length());
|
|
|
|
if (shortFilename == trimmedOtherFilename)
|
|
{
|
|
lastPeriodIndex = otherFilename.lastIndexOf(QChar('.'));
|
|
QString shortOtherFilename;
|
|
|
|
if (lastPeriodIndex >= 0)
|
|
shortOtherFilename = otherFilename.left(lastPeriodIndex);
|
|
else
|
|
shortOtherFilename = otherFilename;
|
|
|
|
QRegExp renameExp("-[0-9]+");
|
|
|
|
if (renameExp.lastIndexIn(shortOtherFilename) == shortFilename.length())
|
|
{
|
|
unsigned int trailingInteger = shortOtherFilename.mid(shortFilename.length() + 1).toUInt(&validIndexOffset);
|
|
|
|
if (!validIndexOffset)
|
|
break;
|
|
|
|
if (trailingInteger > renameIndexOffset)
|
|
renameIndexOffset = trailingInteger;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (validIndexOffset)
|
|
{
|
|
// Ensure renaming won't involve integer overflow!
|
|
if (renameIndex > static_cast<unsigned int>(-1) - renameIndexOffset)
|
|
validIndexOffset = false;
|
|
}
|
|
|
|
if (validIndexOffset)
|
|
{
|
|
shortFilename.append(QChar('-'));
|
|
shortFilename.append(QString::number(renameIndexOffset + renameIndex));
|
|
|
|
return (shortFilename + fileType);
|
|
}
|
|
else
|
|
{
|
|
// Fallback behaviour... an absolutely terrible brute force implementation!
|
|
QString filename;
|
|
QString renamePrefix;
|
|
|
|
for (;;)
|
|
{
|
|
renamePrefix.append(QChar('+'));
|
|
|
|
for (unsigned int i = 0; i < static_cast<unsigned int>(-1); i++)
|
|
{
|
|
filename = shortFilename + renamePrefix + QString::number(i) + fileType;
|
|
|
|
bool valid = true;
|
|
|
|
for (int i = 0; i < fileInfos.length(); i++)
|
|
{
|
|
int lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
if (filename == fileInfos[i].GetFilename().mid(lastSlash + 1))
|
|
{
|
|
valid = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (valid)
|
|
return (filename);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return (filename);
|
|
}
|
|
}
|
|
|
|
QString Packaging::ClashlessFilename(const QList<FileInfo>& fileInfos, const QString& filename)
|
|
{
|
|
unsigned int renameIndex = 0;
|
|
|
|
// Check for name clashes
|
|
for (int i = 0; i < fileInfos.length(); i++)
|
|
{
|
|
int lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
QString otherFilename = fileInfos[i].GetFilename().mid(lastSlash + 1);
|
|
|
|
if (filename == otherFilename)
|
|
renameIndex++;
|
|
}
|
|
|
|
if (renameIndex > 0)
|
|
{
|
|
int lastPeriodIndex = filename.lastIndexOf(QChar('.'));
|
|
QString shortFilename;
|
|
QString fileType;
|
|
|
|
if (lastPeriodIndex >= 0)
|
|
{
|
|
shortFilename = filename.left(lastPeriodIndex);
|
|
fileType = filename.mid(lastPeriodIndex);
|
|
}
|
|
else
|
|
{
|
|
shortFilename = filename;
|
|
}
|
|
|
|
unsigned int renameIndexOffset = 0;
|
|
bool validIndexOffset = true;
|
|
|
|
// Before we append a rename index we must ensure it doesn't produce further collisions.
|
|
for (int i = 0; i < fileInfos.length(); i++)
|
|
{
|
|
int lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
QString otherFilename = fileInfos[i].GetFilename().mid(lastSlash + 1);
|
|
|
|
if (otherFilename.length() > filename.length() + 1)
|
|
{
|
|
QString trimmedOtherFilename = otherFilename.left(filename.length());
|
|
|
|
if (filename == trimmedOtherFilename)
|
|
{
|
|
lastPeriodIndex = otherFilename.lastIndexOf(QChar('.'));
|
|
QString shortOtherFilename;
|
|
|
|
if (lastPeriodIndex >= 0)
|
|
shortOtherFilename = otherFilename.left(lastPeriodIndex);
|
|
else
|
|
shortOtherFilename = otherFilename;
|
|
|
|
QRegExp renameExp("-[0-9]+");
|
|
|
|
if (renameExp.lastIndexIn(shortOtherFilename) == shortFilename.length())
|
|
{
|
|
unsigned int trailingInteger = shortOtherFilename.mid(shortFilename.length() + 1).toUInt(&validIndexOffset);
|
|
|
|
if (!validIndexOffset)
|
|
break;
|
|
|
|
if (trailingInteger > renameIndexOffset)
|
|
renameIndexOffset = trailingInteger;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (validIndexOffset)
|
|
{
|
|
// Ensure renaming won't involve integer overflow!
|
|
if (renameIndex > static_cast<unsigned int>(-1) - renameIndexOffset)
|
|
validIndexOffset = false;
|
|
}
|
|
|
|
if (validIndexOffset)
|
|
{
|
|
shortFilename.append(QChar('-'));
|
|
shortFilename.append(QString::number(renameIndexOffset + renameIndex));
|
|
|
|
return (shortFilename + fileType);
|
|
}
|
|
else
|
|
{
|
|
// Fallback behaviour, brute-force/semi-random.
|
|
bool valid;
|
|
QString filename;
|
|
|
|
do
|
|
{
|
|
valid = true;
|
|
|
|
filename = shortFilename + "-";
|
|
for (int i = 0; i < 8; i++)
|
|
filename.append(QChar(qrand() % ('Z' - 'A' + 1) + 'A'));
|
|
|
|
for (int i = 0; i < fileInfos.length(); i++)
|
|
{
|
|
int lastSlash = fileInfos[i].GetFilename().lastIndexOf('/');
|
|
|
|
if (lastSlash < 0)
|
|
lastSlash = fileInfos[i].GetFilename().lastIndexOf('\\');
|
|
|
|
if (filename == fileInfos[i].GetFilename().mid(lastSlash + 1))
|
|
{
|
|
valid = false;
|
|
break;
|
|
}
|
|
}
|
|
} while (!valid);
|
|
|
|
return (filename);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return (filename);
|
|
}
|
|
}
|