amxmodx/compiler/amxxpc/testmini.c

156 lines
4.2 KiB
C
Raw Normal View History

2005-07-25 00:01:54 +00:00
/* testmini.c -- very simple test program for the miniLZO library
This file is part of the LZO real-time data compression library.
Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
The LZO library 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.
The LZO 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with the LZO library; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
*/
#include <stdio.h>
#include <stdlib.h>
/*************************************************************************
// This program shows the basic usage of the LZO library.
// We will compress a block of data and decompress again.
//
// For more information, documentation, example programs and other support
// files (like Makefiles and build scripts) please download the full LZO
// package from
// http://www.oberhumer.com/opensource/lzo/
**************************************************************************/
/* First let's include "minizo.h". */
#include "minilzo.h"
/* We want to compress the data block at `in' with length `IN_LEN' to
* the block at `out'. Because the input block may be incompressible,
* we must provide a little more output space in case that compression
* is not possible.
*/
#if defined(__LZO_STRICT_16BIT)
#define IN_LEN (8*1024)
#else
#define IN_LEN (128*1024L)
#endif
#define OUT_LEN (IN_LEN + IN_LEN / 64 + 16 + 3)
static lzo_byte in [ IN_LEN ];
static lzo_byte out [ OUT_LEN ];
/* Work-memory needed for compression. Allocate memory in units
* of `lzo_align_t' (instead of `char') to make sure it is properly aligned.
*/
#define HEAP_ALLOC(var,size) \
lzo_align_t __LZO_MMODEL var [ ((size) + (sizeof(lzo_align_t) - 1)) / sizeof(lzo_align_t) ]
static HEAP_ALLOC(wrkmem,LZO1X_1_MEM_COMPRESS);
/*************************************************************************
//
**************************************************************************/
int main(int argc, char *argv[])
{
int r;
lzo_uint in_len;
lzo_uint out_len;
lzo_uint new_len;
#if defined(__EMX__)
_response(&argc,&argv);
_wildcard(&argc,&argv);
#endif
if (argc < 0 && argv == NULL) /* avoid warning about unused args */
return 0;
printf("\nLZO real-time data compression library (v%s, %s).\n",
lzo_version_string(), lzo_version_date());
printf("Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer\n\n");
/*
* Step 1: initialize the LZO library
*/
if (lzo_init() != LZO_E_OK)
{
printf("lzo_init() failed !!!\n");
return 3;
}
/*
* Step 2: prepare the input block that will get compressed.
* We just fill it with zeros in this example program,
* but you would use your real-world data here.
*/
in_len = IN_LEN;
lzo_memset(in,0,in_len);
/*
* Step 3: compress from `in' to `out' with LZO1X-1
*/
r = lzo1x_1_compress(in,in_len,out,&out_len,wrkmem);
if (r == LZO_E_OK)
printf("compressed %lu bytes into %lu bytes\n",
(long) in_len, (long) out_len);
else
{
/* this should NEVER happen */
printf("internal error - compression failed: %d\n", r);
return 2;
}
/* check for an incompressible block */
if (out_len >= in_len)
{
printf("This block contains incompressible data.\n");
return 0;
}
/*
* Step 4: decompress again, now going from `out' to `in'
*/
r = lzo1x_decompress(out,out_len,in,&new_len,NULL);
if (r == LZO_E_OK && new_len == in_len)
printf("decompressed %lu bytes back into %lu bytes\n",
(long) out_len, (long) in_len);
else
{
/* this should NEVER happen */
printf("internal error - decompression failed: %d\n", r);
return 1;
}
printf("\nminiLZO simple compression test passed.\n");
return 0;
}
/*
vi:ts=4
*/