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/* sodata.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/sodata.h>
#include <tnt/component.h>
#include <cxxtools/thread.h>
#include <cxxtools/dlloader.h>
#include <cxxtools/log.h>
#include <zlib.h>
#include <stdlib.h>
#include <string.h>
log_define("tntnet.data")
namespace tnt
{
static cxxtools::Mutex mutex;
void Sodata::setLangSuffix()
{
const char* LANG = getenv("LANG");
std::string sosuffix = std::string(1, '.');
if (LANG)
sosuffix += LANG;
setSoSuffix(sosuffix);
}
void Sodata::addRef(const Compident& ci)
{
cxxtools::MutexLock lock(mutex);
if (refs++ == 0)
{
// read data from shared library
log_debug("load library " << ci.libname << sosuffix);
cxxtools::dl::Library so((ci.libname + sosuffix).c_str());
cxxtools::dl::Symbol datalen_sym = so.sym((ci.compname + "_datalen").c_str());
unsigned datalen = *reinterpret_cast<unsigned*>(datalen_sym.getSym());
try
{
// try to read compressed data
cxxtools::dl::Symbol zdata_sym = so.sym((ci.compname + "_zdata").c_str());
cxxtools::dl::Symbol zdatalen_sym = so.sym((ci.compname + "_zdatalen").c_str());
const char** zdata = reinterpret_cast<const char**>(zdata_sym.getSym());
unsigned zdatalen = *reinterpret_cast<unsigned*>(zdatalen_sym.getSym());
log_debug(zdatalen << " bytes compressed data, " << datalen
<< " bytes uncompressed");
// ... and uncompress it
data = new char[datalen];
uLong destlen = datalen;
int z_ret = uncompress((Bytef*)data, &destlen, (const Bytef*)*zdata, zdatalen);
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");
}
catch(const cxxtools::dl::SymbolNotFound&)
{
// compressed data not found - try uncompressed
cxxtools::dl::Symbol data_sym = so.sym((ci.compname + "_data").c_str());
const char** srcdata = reinterpret_cast<const char**>(data_sym.getSym());
log_debug(datalen << " bytes data");
// ... and copy it
data = new char[datalen];
memcpy(data, *srcdata, datalen);
}
}
}
void Sodata::release()
{
cxxtools::MutexLock lock(mutex);
if (--refs <= 0)
{
log_debug("release");
delete[] data;
data = 0;
}
}
}
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