mirror of https://github.com/aria2/aria2
123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
/* <!-- 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 "GZipDecoder.h"
|
|
#include "StringFormat.h"
|
|
#include "DlAbortEx.h"
|
|
|
|
namespace aria2 {
|
|
|
|
const std::string GZipDecoder::NAME("GZipDecoder");
|
|
|
|
GZipDecoder::GZipDecoder():_strm(0), _finished(false) {}
|
|
|
|
GZipDecoder::~GZipDecoder()
|
|
{
|
|
release();
|
|
}
|
|
|
|
void GZipDecoder::init()
|
|
{
|
|
_finished = false;
|
|
release();
|
|
_strm = new z_stream();
|
|
_strm->zalloc = Z_NULL;
|
|
_strm->zfree = Z_NULL;
|
|
_strm->opaque = Z_NULL;
|
|
_strm->avail_in = 0;
|
|
_strm->next_in = Z_NULL;
|
|
|
|
// initalize z_stream with gzip/zlib format auto detection enabled.
|
|
if(Z_OK != inflateInit2(_strm, 47)) {
|
|
throw DL_ABORT_EX("Initializing z_stream failed.");
|
|
}
|
|
}
|
|
|
|
void GZipDecoder::release()
|
|
{
|
|
if(_strm) {
|
|
inflateEnd(_strm);
|
|
delete _strm;
|
|
_strm = 0;
|
|
}
|
|
}
|
|
|
|
std::string GZipDecoder::decode(const unsigned char* in, size_t length)
|
|
{
|
|
std::string out;
|
|
|
|
if(length == 0) {
|
|
return out;
|
|
}
|
|
|
|
_strm->avail_in = length;
|
|
_strm->next_in = const_cast<unsigned char*>(in);
|
|
|
|
unsigned char outbuf[OUTBUF_LENGTH];
|
|
while(1) {
|
|
_strm->avail_out = OUTBUF_LENGTH;
|
|
_strm->next_out = outbuf;
|
|
|
|
int ret = ::inflate(_strm, Z_NO_FLUSH);
|
|
|
|
if(ret == Z_STREAM_END) {
|
|
_finished = true;
|
|
} else if(ret != Z_OK) {
|
|
throw DL_ABORT_EX(StringFormat("libz::inflate() failed. cause:%s",
|
|
_strm->msg).str());
|
|
}
|
|
|
|
size_t produced = OUTBUF_LENGTH-_strm->avail_out;
|
|
|
|
out.append(&outbuf[0], &outbuf[produced]);
|
|
|
|
if(_strm->avail_out > 0) {
|
|
break;
|
|
}
|
|
}
|
|
return out;
|
|
}
|
|
|
|
bool GZipDecoder::finished()
|
|
{
|
|
return _finished;
|
|
}
|
|
|
|
const std::string& GZipDecoder::getName() const
|
|
{
|
|
return NAME;
|
|
}
|
|
|
|
} // namespace aria2
|