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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#include "Z.h"
#include "Misc.h"
int ZCompress(z_stream *stream, unsigned char *dest, unsigned int *destLen,
const unsigned char *source, unsigned int sourceLen)
{
//
// Deal with the possible overflow.
//
if (stream -> total_out & 0x80000000)
{
#ifdef TEST
*logofs << "ZCompress: Reset stream counters with "
<< "total in " << stream -> total_in
<< " and total out " << stream -> total_out
<< ".\n" << logofs_flush;
#endif
stream -> total_in = 0;
stream -> total_out = 0;
}
unsigned int saveOut = stream -> total_out;
stream -> next_in = (Bytef *) source;
stream -> avail_in = sourceLen;
//
// Check if the source is bigger than
// 64K on 16-bit machine.
//
#ifdef MAXSEG_64K
if ((uLong) stream -> avail_in != sourceLen) return Z_BUF_ERROR;
#endif
stream -> next_out = dest;
stream -> avail_out = *destLen;
#ifdef MAXSEG_64K
if ((uLong) stream -> avail_out != *destLen) return Z_BUF_ERROR;
#endif
int result = deflate(stream, Z_FINISH);
if (result != Z_STREAM_END)
{
deflateReset(stream);
return (result == Z_OK ? Z_BUF_ERROR : result);
}
*destLen = stream -> total_out - saveOut;
result = deflateReset(stream);
return result;
}
int ZDecompress(z_stream *stream, unsigned char *dest, unsigned int *destLen,
const unsigned char *source, unsigned int sourceLen)
{
stream -> next_in = (Bytef *) source;
stream -> avail_in = sourceLen;
//
// Deal with the possible overflow.
//
if (stream -> total_out & 0x80000000)
{
#ifdef TEST
*logofs << "ZDecompress: Reset stream counters with "
<< "total in " << stream -> total_in
<< " and total out " << stream -> total_out
<< ".\n" << logofs_flush;
#endif
stream -> total_in = 0;
stream -> total_out = 0;
}
unsigned int saveOut = stream -> total_out;
if (stream -> avail_in != sourceLen)
{
return Z_BUF_ERROR;
}
stream -> next_out = dest;
stream -> avail_out = *destLen;
if (stream -> avail_out != *destLen)
{
return Z_BUF_ERROR;
}
int result = inflate(stream, Z_FINISH);
if (result != Z_STREAM_END)
{
inflateReset(stream);
return (result == Z_OK ? Z_BUF_ERROR : result);
}
*destLen = stream -> total_out - saveOut;
result = inflateReset(stream);
return result;
}
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