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/*
* Copyright (C) 2003 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <tnt/zdata.h>
#include <tnt/util.h>
#include <zlib.h>
#include <stdexcept>
#include <cxxtools/log.h>
log_define("tntnet.data")
namespace tnt
{
void Zdata::addRef()
{
if (cxxtools::atomicIncrement(refs) == 1)
{
// 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)
{
throwRuntimeError(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()
{
if (cxxtools::atomicDecrement(refs) == 0)
{
log_debug("release " << data_len << " uncompressed bytes");
delete[] data;
data = 0;
}
}
}
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