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/* lzo.c - location for general purpose minilzo functions
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
* Change Logs:
* Date Author Notes
*/
#include <rtthread.h>
#include "minilzo.h"
#ifdef RT_USING_FINSH
#include <finsh.h>
#endif
#define RT_USING_LZO
#if defined(RT_USING_LZO) && defined(RT_USING_DFS)
#ifdef _WIN32
#pragma warning(disable: 4996)
#endif
#include <dfs_posix.h>
/* the worst of allocation */
#define LZO1X_WORST(x) ( (x) + ((x)/16) + 64 + 3 )
#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);
char* parse_lzo_error_code(int error_code)
{
switch(error_code)
{
case LZO_E_ERROR: return "error";
case LZO_E_OUT_OF_MEMORY: return "out of memory";
case LZO_E_NOT_COMPRESSIBLE: return "not compressible";
case LZO_E_INPUT_OVERRUN: return "input overrun";
case LZO_E_OUTPUT_OVERRUN: return "output overrun";
case LZO_E_LOOKBEHIND_OVERRUN: return "lookbehind overrun";
case LZO_E_EOF_NOT_FOUND: return "eof not found";
case LZO_E_INPUT_NOT_CONSUMED: return "input not consumed";
case LZO_E_NOT_YET_IMPLEMENTED: return "not yet implemented"; /* [not used right now] */
case LZO_E_INVALID_ARGUMENT: return "invalid argument";
default: return "none";
}
}
int lzo(char *srcfile, char *destfile)
{
int result;
int fd;
struct stat s;
lzo_bytep in;
lzo_bytep out;
lzo_uint in_len, out_len;
rt_memset(&s, 0, sizeof(struct stat));
stat(srcfile, &s);
in_len = s.st_size;
in = rt_malloc(in_len);
if (in == RT_NULL) return -1;
out = rt_malloc(LZO1X_WORST(in_len));
if (out == RT_NULL) return -1;
fd = open(srcfile, O_RDONLY, 0);
if(fd < 0)
{
result = -1;
goto _exit;
}
read(fd, in, in_len);
close(fd);
result = lzo1x_1_compress(in, in_len, out, &out_len, wrkmem);
if(result != LZO_E_OK)
{
rt_kprintf("internal error - compression failed: \nerr_code:(%d) %s, %s.\n",
result, parse_lzo_error_code(result), "Please use the binary access");
goto _exit;
}
fd = open(destfile, O_WRONLY | O_BINARY | O_CREAT, 0);
if(fd < 0)
{
result = -1;
goto _exit;
}
write(fd, &in_len, sizeof(lzo_uint)); /* source file len */
write(fd, out, out_len);
close(fd);
rt_kprintf("compress lzo ok!\n");
result = 0;
_exit:
rt_free(in);
rt_free(out);
return result;
}
#ifdef RT_USING_FINSH
FINSH_FUNCTION_EXPORT(lzo, compress a file. usage:lzo(src, dest));
#endif
int lzode(char *srcfile, char *destfile)
{
int result;
int fd;
struct stat s;
lzo_bytep in=RT_NULL;
lzo_bytep out=RT_NULL;
lzo_uint in_len, out_len;
rt_memset(&s, 0, sizeof(struct stat));
stat(srcfile, &s);
in_len = s.st_size;
fd = open(srcfile, O_RDONLY, 0);
if(fd < 0) return 0;
read(fd, &out_len, sizeof(lzo_uint)); /* source file len */
in_len -= sizeof(lzo_uint);
in = rt_malloc(in_len);
if (in == RT_NULL) return -1;
out = rt_malloc(out_len);
if (out == RT_NULL) return -1;
read(fd, in, in_len);
close(fd);
result = lzo1x_decompress(in, in_len, out, &out_len, RT_NULL);
if(result != LZO_E_OK)
{
rt_kprintf("internal error - decompression failed: \nerr_code:(%d) %s, %s.\n",
result, parse_lzo_error_code(result), "Please use the binary access");
goto _exit;
}
fd = open(destfile, O_WRONLY | O_BINARY | O_CREAT, 0);
if(fd < 0)
{
result = -1;
goto _exit;
}
write(fd, out, out_len);
close(fd);
rt_kprintf("decompress lzo ok!\n");
result = 0;
_exit:
rt_free(in);
rt_free(out);
return result;
}
#ifdef RT_USING_FINSH
FINSH_FUNCTION_EXPORT(lzode, decompress a file. usage:lzode(src, dest));
#endif
#endif
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