mirror of https://github.com/aria2/aria2
299 lines
8.3 KiB
C++
299 lines
8.3 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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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 2 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "MultiDiskAdaptor.h"
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#include "DefaultDiskWriter.h"
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#include "message.h"
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#include "Util.h"
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#include "FileEntry.h"
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#include "MultiFileAllocationIterator.h"
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#include "DefaultDiskWriterFactory.h"
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#include "DlAbortEx.h"
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#include "File.h"
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namespace aria2 {
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DiskWriterEntry::DiskWriterEntry(const SharedHandle<FileEntry>& fileEntry):
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fileEntry(fileEntry),
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diskWriter(0) {}
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DiskWriterEntry::~DiskWriterEntry() {}
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std::string DiskWriterEntry::getFilePath(const std::string& topDir) const
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{
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return topDir+"/"+fileEntry->getPath();
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}
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void DiskWriterEntry::initAndOpenFile(const std::string& topDir)
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{
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diskWriter->initAndOpenFile(getFilePath(topDir), fileEntry->getLength());
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}
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void DiskWriterEntry::openFile(const std::string& topDir)
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{
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diskWriter->openFile(getFilePath(topDir), fileEntry->getLength());
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}
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void DiskWriterEntry::openExistingFile(const std::string& topDir)
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{
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diskWriter->openExistingFile(getFilePath(topDir), fileEntry->getLength());
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}
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void DiskWriterEntry::closeFile()
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{
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diskWriter->closeFile();
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}
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bool DiskWriterEntry::fileExists(const std::string& topDir)
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{
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return File(getFilePath(topDir)).exists();
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}
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uint64_t DiskWriterEntry::size() const
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{
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return diskWriter->size();
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}
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SharedHandle<FileEntry> DiskWriterEntry::getFileEntry() const
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{
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return fileEntry;
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}
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void DiskWriterEntry::setDiskWriter(const SharedHandle<DiskWriter>& diskWriter)
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{
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this->diskWriter = diskWriter;
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}
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SharedHandle<DiskWriter> DiskWriterEntry::getDiskWriter() const
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{
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return diskWriter;
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}
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bool DiskWriterEntry::operator<(const DiskWriterEntry& entry) const
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{
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return fileEntry < entry.fileEntry;
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}
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MultiDiskAdaptor::MultiDiskAdaptor():
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pieceLength(0) {}
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MultiDiskAdaptor::~MultiDiskAdaptor() {}
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void MultiDiskAdaptor::resetDiskWriterEntries()
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{
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diskWriterEntries.clear();
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for(FileEntries::const_iterator itr = fileEntries.begin();
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itr != fileEntries.end(); itr++) {
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DiskWriterEntryHandle entry = new DiskWriterEntry(*itr);
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if((*itr)->isRequested()) {
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entry->setDiskWriter(DefaultDiskWriterFactory().newDiskWriter());
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} else {
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entry->setDiskWriter(new DefaultDiskWriter());
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}
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entry->getDiskWriter()->setDirectIOAllowed(_directIOAllowed);
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diskWriterEntries.push_back(entry);
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}
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}
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std::string MultiDiskAdaptor::getTopDirPath() const
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{
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return storeDir+"/"+topDir;
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}
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void MultiDiskAdaptor::mkdir() const
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{
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for(FileEntries::const_iterator itr = fileEntries.begin();
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itr != fileEntries.end(); itr++) {
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(*itr)->setupDir(getTopDirPath());
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}
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}
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void MultiDiskAdaptor::openFile()
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{
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mkdir();
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resetDiskWriterEntries();
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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(*itr)->openFile(getTopDirPath());
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}
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}
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void MultiDiskAdaptor::initAndOpenFile()
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{
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mkdir();
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resetDiskWriterEntries();
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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(*itr)->initAndOpenFile(getTopDirPath());
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}
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}
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void MultiDiskAdaptor::openExistingFile()
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{
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resetDiskWriterEntries();
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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(*itr)->openExistingFile(getTopDirPath());
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}
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}
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void MultiDiskAdaptor::closeFile()
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{
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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(*itr)->closeFile();
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}
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}
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void MultiDiskAdaptor::onDownloadComplete()
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{
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closeFile();
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openFile();
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}
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void MultiDiskAdaptor::writeData(const unsigned char* data, size_t len,
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off_t offset)
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{
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off_t fileOffset = offset;
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bool writing = false;
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size_t rem = len;
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end() && rem != 0; itr++) {
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if(isInRange(*itr, offset) || writing) {
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size_t writeLength = calculateLength(*itr, fileOffset, rem);
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(*itr)->getDiskWriter()->writeData(data+(len-rem), writeLength, fileOffset);
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rem -= writeLength;
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writing = true;
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fileOffset = 0;
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} else {
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fileOffset -= (*itr)->getFileEntry()->getLength();
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}
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}
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if(!writing) {
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throw new DlAbortEx(EX_FILE_OFFSET_OUT_OF_RANGE, Util::itos(offset, true).c_str());
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}
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}
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bool MultiDiskAdaptor::isInRange(const DiskWriterEntryHandle entry,
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off_t offset) const
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{
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return entry->getFileEntry()->getOffset() <= offset &&
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(uint64_t)offset < entry->getFileEntry()->getOffset()+entry->getFileEntry()->getLength();
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}
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size_t MultiDiskAdaptor::calculateLength(const DiskWriterEntryHandle entry,
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off_t fileOffset,
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size_t rem) const
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{
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size_t length;
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if(entry->getFileEntry()->getLength() < (uint64_t)fileOffset+rem) {
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length = entry->getFileEntry()->getLength()-fileOffset;
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} else {
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length = rem;
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}
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return length;
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}
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ssize_t MultiDiskAdaptor::readData(unsigned char* data, size_t len, off_t offset)
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{
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off_t fileOffset = offset;
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bool reading = false;
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size_t rem = len;
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size_t totalReadLength = 0;
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end() && rem != 0; itr++) {
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if(isInRange(*itr, offset) || reading) {
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size_t readLength = calculateLength((*itr), fileOffset, rem);
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totalReadLength += (*itr)->getDiskWriter()->readData(data+(len-rem), readLength, fileOffset);
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rem -= readLength;
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reading = true;
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fileOffset = 0;
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} else {
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fileOffset -= (*itr)->getFileEntry()->getLength();
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}
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}
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if(!reading) {
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throw new DlAbortEx(EX_FILE_OFFSET_OUT_OF_RANGE, Util::itos(offset, true).c_str());
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}
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return totalReadLength;
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}
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bool MultiDiskAdaptor::fileExists()
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{
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if(diskWriterEntries.empty()) {
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resetDiskWriterEntries();
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}
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for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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if((*itr)->fileExists(getTopDirPath())) {
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return true;
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}
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}
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return false;
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}
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// TODO call DiskWriter::openFile() before calling this function.
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uint64_t MultiDiskAdaptor::size() const
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{
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uint64_t size = 0;
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for(DiskWriterEntries::const_iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); itr++) {
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size += (*itr)->size();
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}
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return size;
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}
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FileAllocationIteratorHandle MultiDiskAdaptor::fileAllocationIterator()
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{
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return new MultiFileAllocationIterator(this);
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}
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void MultiDiskAdaptor::enableDirectIO()
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{
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for(DiskWriterEntries::const_iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); ++itr) {
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(*itr)->getDiskWriter()->enableDirectIO();
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}
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}
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void MultiDiskAdaptor::disableDirectIO()
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{
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for(DiskWriterEntries::const_iterator itr = diskWriterEntries.begin();
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itr != diskWriterEntries.end(); ++itr) {
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(*itr)->getDiskWriter()->disableDirectIO();
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}
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}
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} // namespace aria2
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