int lzo_decompress_dict(const lzo_bytep in, lzo_uint in_len,
lzo_bytep out, lzo_uintp out_len,
lzo_voidp wrkmem /* NOT USED */,
const lzo_bytep dict, lzo_uint dict_len)
{
return lzo1x_decompress_dict_safe(in, in_len, out, out_len, wrkmem, dict, dict_len);
}
int do_file ( const char *in_name, int level )
{
int r;
lzo_bytep in;
lzo_bytep out;
lzo_bytep newb;
lzo_bytep wrkmem;
lzo_uint in_len;
lzo_uint out_len;
lzo_uint new_len;
long l;
FILE *f;
/*
* Step 1: open the input file
*/
f = fopen(in_name,"rb");
if (f == 0)
{
printf("%s: cannot open file %s\n", progname, in_name);
return 0; /* no error */
}
fseek(f,0,SEEK_END);
l = ftell(f);
fseek(f,0,SEEK_SET);
if (l <= 0)
{
printf("%s: %s: empty file -- skipping\n", progname, in_name);
fclose(f);
return 0;
}
in_len = (lzo_uint) l;
/*
* Step 2: allocate compression buffers and read the file
*/
in = (lzo_bytep) lzo_malloc(in_len);
out = (lzo_bytep) lzo_malloc(in_len + in_len / 16 + 64 + 3);
newb = (lzo_bytep) lzo_malloc(in_len);
wrkmem = (lzo_bytep) lzo_malloc(LZO1X_999_MEM_COMPRESS);
if (in == NULL || out == NULL || newb == NULL || wrkmem == NULL)
{
printf("%s: out of memory\n", progname);
exit(1);
}
in_len = (lzo_uint) lzo_fread(f,in,in_len);
fclose(f);
/*
* Step 3: compress from `in' to `out' with LZO1X-999
*/
r = lzo1x_999_compress_level(in,in_len,out,&out_len,wrkmem,
dict, dict_len, 0, level);
if (r != LZO_E_OK)
{
/* this should NEVER happen */
printf("internal error - compression failed: %d\n", r);
return 1;
}
print_file(in_name,in_len,out_len);
/*
* Step 4: decompress again, now going from `out' to `newb'
*/
new_len = in_len;
r = lzo1x_decompress_dict_safe(out,out_len,newb,&new_len,NULL,dict,dict_len);
if (r != LZO_E_OK)
{
/* this should NEVER happen */
printf("internal error - decompression failed: %d\n", r);
return 1;
}
/*
* Step 5: verify decompression
*/
if (new_len != in_len || lzo_memcmp(in,newb,in_len) != 0)
{
/* this should NEVER happen */
printf("internal error - decompression data error\n");
return 1;
}
/* free buffers in reverse order to help malloc() */
lzo_free(wrkmem);
lzo_free(newb);
lzo_free(out);
lzo_free(in);
return 0;
}
