pcompress/lzfx_compress.c
Moinak Ghosh 9eac774eb1 Add multithreaded LZMA port from p7zip
Compute balanced thread count between chunk threads and algo threads
Generic way to handle querying algorithm parameters
Clean up unnecessary includes
2012-08-18 10:20:52 +05:30

131 lines
2.9 KiB
C

/*
* This file is a part of Pcompress, a chunked parallel multi-
* algorithm lossless compression and decompression program.
*
* Copyright (C) 2012 Moinak Ghosh. All rights reserved.
* Use is subject to license terms.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* moinakg@belenix.org, http://moinakg.wordpress.com/
*
* This program includes partly-modified public domain source
* code from the LZMA SDK: http://www.7-zip.org/sdk.html
*/
#include <sys/types.h>
#include <stdio.h>
#include <strings.h>
#include <limits.h>
#include <utils.h>
#include <pcompress.h>
#include <lzfx.h>
#include <allocator.h>
struct lzfx_params {
uint32_t htab_bits;
};
void
lz_fx_stats(int show)
{
}
int
lz_fx_init(void **data, int *level, int nthreads, ssize_t chunksize)
{
struct lzfx_params *lzdat;
int lev;
if (chunksize > UINT_MAX) {
fprintf(stderr, "Chunk size too big for LZFX.\n");
return (1);
}
lzdat = slab_alloc(NULL, sizeof (struct lzfx_params));
lev = *level;
if (lev > 5) lev = 5;
lzdat->htab_bits = 16 + (lev-1);
*data = lzdat;
if (*level > 9) *level = 9;
return (0);
}
int
lz_fx_deinit(void **data)
{
struct lzfx_params *lzdat = (struct lzfx_params *)(*data);
if (lzdat) {
slab_free(NULL, lzdat);
}
*data = NULL;
return (0);
}
static void
lz_fx_err(int err)
{
switch (err) {
case LZFX_ESIZE:
fprintf(stderr, "LZFX: Output buffer too small.\n");
break;
case LZFX_ECORRUPT:
fprintf(stderr, "LZFX: Corrupt data for decompression.\n");
break;
case LZFX_EARGS:
fprintf(stderr, "LZFX: Invalid arguments.\n");
break;
case LZFX_ENOMEM:
fprintf(stderr, "LZFX: Out of memory when allocating hashtable.\n");
break;
default:
fprintf(stderr, "LZFX: Unknown error code: %d\n", err);
}
}
int
lz_fx_compress(void *src, size_t srclen, void *dst, size_t *dstlen,
int level, uchar_t chdr, void *data)
{
int rv;
struct lzfx_params *lzdat = (struct lzfx_params *)data;
unsigned int _srclen = srclen;
unsigned int _dstlen = *dstlen;
rv = lzfx_compress(src, _srclen, dst, &_dstlen, lzdat->htab_bits);
if (rv != 0) {
if (rv != LZFX_ESIZE)
lz_fx_err(rv);
return (-1);
}
*dstlen = _dstlen;
return (0);
}
int
lz_fx_decompress(void *src, size_t srclen, void *dst, size_t *dstlen,
int level, uchar_t chdr, void *data)
{
int rv;
unsigned int _srclen = srclen;
unsigned int _dstlen = *dstlen;
rv = lzfx_decompress(src, _srclen, dst, &_dstlen);
if (rv != 0) {
lz_fx_err(rv);
return (-1);
}
*dstlen = _dstlen;
return (0);
}