mirror of https://github.com/aria2/aria2
71 lines
2.5 KiB
C++
71 lines
2.5 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 "PreAllocationDiskWriter.h"
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#include "DlAbortEx.h"
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#include "message.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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PreAllocationDiskWriter::PreAllocationDiskWriter(uint64_t totalLength)
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:AbstractDiskWriter(totalLength) {}
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PreAllocationDiskWriter::~PreAllocationDiskWriter() {}
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void PreAllocationDiskWriter::initAndOpenFile(const string& filename)
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{
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createFile(filename);
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int bufSize = 4096;
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char buf[4096];
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memset(buf, 0, bufSize);
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long long int x = totalLength/bufSize;
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int r = totalLength%bufSize;
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for(long long int i = 0; i < x; i++) {
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if(write(fd, buf, bufSize) < 0) {
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throw new DlAbortEx(EX_FILE_WRITE, filename.c_str(), strerror(errno));
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}
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}
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if(r > 0) {
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seek(totalLength-r);
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if(write(fd, buf, r) < 0) {
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throw new DlAbortEx(EX_FILE_WRITE, filename.c_str(), strerror(errno));
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}
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}
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}
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