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/*
* The Mana Server
* Copyright (C) 2006-2010 The Mana World Development Team
*
* This file is part of The Mana Server.
*
* The Mana Server 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
* any later version.
*
* The Mana Server 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 The Mana Server. If not, see <http://www.gnu.org/licenses/>.
*/
#include <cstdlib>
#include <zlib.h>
#include "utils/zlib.hpp"
#include "utils/logger.h"
static void logZlibError(int error)
{
switch (error)
{
case Z_MEM_ERROR:
LOG_ERROR("Out of memory while decompressing data!");
break;
case Z_VERSION_ERROR:
LOG_ERROR("Incompatible zlib version!");
break;
case Z_DATA_ERROR:
LOG_ERROR("Incorrect zlib compressed data!");
break;
default:
LOG_ERROR("Unknown error while decompressing data!");
}
}
bool inflateMemory(char *in, unsigned inLength,
char *&out, unsigned &outLength)
{
int bufferSize = 256 * 1024;
int ret;
z_stream strm;
out = (char *)malloc(bufferSize);
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
strm.next_in = (Bytef *)in;
strm.avail_in = inLength;
strm.next_out = (Bytef *)out;
strm.avail_out = bufferSize;
ret = inflateInit2(&strm, 15 + 32);
if (ret != Z_OK)
{
logZlibError(ret);
free(out);
return false;
}
do
{
ret = inflate(&strm, Z_SYNC_FLUSH);
switch (ret) {
case Z_NEED_DICT:
case Z_STREAM_ERROR:
ret = Z_DATA_ERROR;
case Z_DATA_ERROR:
case Z_MEM_ERROR:
inflateEnd(&strm);
logZlibError(ret);
free(out);
return false;
}
if (ret != Z_STREAM_END)
{
out = (char *)realloc(out, bufferSize * 2);
if (!out)
{
inflateEnd(&strm);
logZlibError(Z_MEM_ERROR);
free(out);
return false;
}
strm.next_out = (Bytef *)(out + bufferSize);
strm.avail_out = bufferSize;
bufferSize *= 2;
}
}
while (ret != Z_STREAM_END);
if (strm.avail_in != 0)
{
logZlibError(Z_DATA_ERROR);
free(out);
return false;
}
outLength = bufferSize - strm.avail_out;
inflateEnd(&strm);
return true;
}
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