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/* zdata.cpp
* Copyright (C) 2003 Tommi Maekitalo
*
* 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
* is provided AS IS, WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, and
* NON-INFRINGEMENT. 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <tnt/zdata.h>
#include <zlib.h>
#include <stdexcept>
#include <cxxtools/thread.h>
#include <cxxtools/log.h>
log_define("tntnet.data")
namespace tnt
{
static cxxtools::Mutex mutex;
void Zdata::addRef()
{
cxxtools::MutexLock lock(mutex);
if (refs++ == 0)
{
// allocate uncompressed data
data = new char[data_len];
// uncompress Zdata => data
log_debug("uncompress " << zdata_len << " to " << data_len << " bytes");
uLong dest_len = data_len;
int z_ret = uncompress((Bytef*)data, &dest_len, (const Bytef*)zptr, zdata_len);
if (z_ret != Z_OK)
{
throw std::runtime_error(std::string("error uncompressing data: ") +
(z_ret == Z_MEM_ERROR ? "Z_MEM_ERROR" :
z_ret == Z_BUF_ERROR ? "Z_BUF_ERROR" :
z_ret == Z_DATA_ERROR ? "Z_DATA_ERROR" : "unknown error"));
}
log_debug("uncompress ready");
}
}
void Zdata::release()
{
cxxtools::MutexLock lock(mutex);
if (--refs <= 0)
{
log_debug("release " << data_len << " uncompressed bytes");
delete[] data;
data = 0;
}
}
}
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