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