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/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "MultiFileAllocationIterator.h"
#include "MultiDiskAdaptor.h"
#include "FileEntry.h"
#define BUFSIZE 16*1024
MultiFileAllocationIterator::MultiFileAllocationIterator(MultiDiskAdaptor* diskAdaptor):
_diskAdaptor(diskAdaptor),
_entries(diskAdaptor->getFileEntries()),
_currentEntry(0),
_offset(0)
{}
MultiFileAllocationIterator::~MultiFileAllocationIterator() {}
void MultiFileAllocationIterator::prepareNextEntry()
{
_currentEntry = 0;
_offset = 0;
while(!_entries.empty()) {
FileEntryHandle entry = _entries.front();
_entries.pop_front();
if(entry->isRequested()) {
_currentEntry = entry;
_offset = File(_diskAdaptor->getStoreDir()+"/"+
_diskAdaptor->getTopDir()+"/"+
_currentEntry->getPath()).size();
break;
}
}
}
void MultiFileAllocationIterator::allocateChunk()
{
while(_currentEntry.isNull() || _currentEntry->getLength() <= _offset) {
prepareNextEntry();
if(_currentEntry.isNull()) {
break;
}
}
if(finished()) {
return;
}
int32_t bufSize = BUFSIZE;
unsigned char buf[BUFSIZE];
memset(buf, 0, bufSize);
int32_t wsize = _offset+bufSize > _currentEntry->getLength() ?
_currentEntry->getLength()-_offset:bufSize;
_diskAdaptor->writeData(buf, wsize, _offset+_currentEntry->getOffset());
_offset += wsize;
}
bool MultiFileAllocationIterator::finished()
{
return _entries.empty() && _currentEntry.isNull();
}
int64_t MultiFileAllocationIterator::getTotalLength()
{
if(_currentEntry.isNull()) {
return 0;
} else {
return _currentEntry->getLength();
}
}
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