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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 "SingleFileAllocationIterator.h"
#include "BinaryStream.h"
#include "Util.h"
#include "a2io.h"
#include <cstring>
namespace aria2 {
#define BUFSIZE (256*1024)
#define ALIGNMENT 512
SingleFileAllocationIterator::SingleFileAllocationIterator(BinaryStream* stream, off_t offset, uint64_t totalLength):_stream(stream), _offset(offset), _totalLength(totalLength), _buffer(0)
{
if(_offset%ALIGNMENT != 0) {
_stream->disableDirectIO();
}
}
SingleFileAllocationIterator::~SingleFileAllocationIterator()
{
delete [] _buffer;
}
void SingleFileAllocationIterator::init()
{
#ifdef HAVE_POSIX_MEMALIGN
_buffer = (unsigned char*)Util::allocateAlignedMemory(ALIGNMENT, BUFSIZE);
#else
_buffer = new unsigned char[BUFSIZE];
#endif // HAVE_POSIX_MEMALIGN
memset(_buffer, 0, BUFSIZE);
}
void SingleFileAllocationIterator::allocateChunk()
{
_stream->writeData(_buffer, BUFSIZE, _offset);
_offset += BUFSIZE;
if(_totalLength < (uint64_t)_offset) {
_stream->truncate(_totalLength);
_offset = _totalLength;
}
}
bool SingleFileAllocationIterator::finished()
{
return (uint64_t)_offset >= _totalLength;
}
} // namespace aria2
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