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authorDongsheng Yang <yangds.fnst@cn.fujitsu.com>2015-10-31 11:12:01 +0800
committerBrian Norris <computersforpeace@gmail.com>2015-11-11 14:38:40 -0800
commit7d81790ced345585b1e647ca9d0f6678e7062fa4 (patch)
tree02f61270c7a0fff7bb6b2e28f247a3d2fd6ff490 /mkfs.ubifs/compr.c
parent344753f2aacb94d98ce238f81fc4a4b6ef6adea9 (diff)
mtd-utils: Restructure the mtd-utils source.
* There is no code modification in this commit, only moving * the files to proper place. The user tools looks a little messy as we place almost the all tools in the root directory of mtd-utils. To make it more clear, I propose to introduce the following structure for our source code. mtd-utils/ |-- lib |-- include |-- misc-utils |-- jffsX-utils |-- nand-utils |-- nor-utils |-- ubi-utils |-- ubifs-utils `-- tests Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'mkfs.ubifs/compr.c')
-rw-r--r--mkfs.ubifs/compr.c219
1 files changed, 0 insertions, 219 deletions
diff --git a/mkfs.ubifs/compr.c b/mkfs.ubifs/compr.c
deleted file mode 100644
index 34b2f60..0000000
--- a/mkfs.ubifs/compr.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright (C) 2008 Nokia Corporation.
- * Copyright (C) 2008 University of Szeged, Hungary
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * 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 General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Authors: Artem Bityutskiy
- * Adrian Hunter
- * Zoltan Sogor
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <string.h>
-#include <lzo/lzo1x.h>
-#include <linux/types.h>
-
-#define crc32 __zlib_crc32
-#include <zlib.h>
-#undef crc32
-
-#include "compr.h"
-#include "mkfs.ubifs.h"
-
-static void *lzo_mem;
-static unsigned long long errcnt = 0;
-static struct ubifs_info *c = &info_;
-
-#define DEFLATE_DEF_LEVEL Z_DEFAULT_COMPRESSION
-#define DEFLATE_DEF_WINBITS 11
-#define DEFLATE_DEF_MEMLEVEL 8
-
-static int zlib_deflate(void *in_buf, size_t in_len, void *out_buf,
- size_t *out_len)
-{
- z_stream strm;
-
- strm.zalloc = NULL;
- strm.zfree = NULL;
-
- /*
- * Match exactly the zlib parameters used by the Linux kernel crypto
- * API.
- */
- if (deflateInit2(&strm, DEFLATE_DEF_LEVEL, Z_DEFLATED,
- -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL,
- Z_DEFAULT_STRATEGY)) {
- errcnt += 1;
- return -1;
- }
-
- strm.next_in = in_buf;
- strm.avail_in = in_len;
- strm.total_in = 0;
-
- strm.next_out = out_buf;
- strm.avail_out = *out_len;
- strm.total_out = 0;
-
- if (deflate(&strm, Z_FINISH) != Z_STREAM_END) {
- deflateEnd(&strm);
- errcnt += 1;
- return -1;
- }
-
- if (deflateEnd(&strm) != Z_OK) {
- errcnt += 1;
- return -1;
- }
-
- *out_len = strm.total_out;
-
- return 0;
-}
-
-static int lzo_compress(void *in_buf, size_t in_len, void *out_buf,
- size_t *out_len)
-{
- lzo_uint len;
- int ret;
-
- len = *out_len;
- ret = lzo1x_999_compress(in_buf, in_len, out_buf, &len, lzo_mem);
- *out_len = len;
-
- if (ret != LZO_E_OK) {
- errcnt += 1;
- return -1;
- }
-
- return 0;
-}
-
-static int no_compress(void *in_buf, size_t in_len, void *out_buf,
- size_t *out_len)
-{
- memcpy(out_buf, in_buf, in_len);
- *out_len = in_len;
- return 0;
-}
-
-static char *zlib_buf;
-
-static int favor_lzo_compress(void *in_buf, size_t in_len, void *out_buf,
- size_t *out_len, int *type)
-{
- int lzo_ret, zlib_ret;
- size_t lzo_len, zlib_len;
-
- lzo_len = zlib_len = *out_len;
- lzo_ret = lzo_compress(in_buf, in_len, out_buf, &lzo_len);
- zlib_ret = zlib_deflate(in_buf, in_len, zlib_buf, &zlib_len);
-
- if (lzo_ret && zlib_ret)
- /* Both compressors failed */
- return -1;
-
- if (!lzo_ret && !zlib_ret) {
- double percent;
-
- /* Both compressors succeeded */
- if (lzo_len <= zlib_len )
- goto select_lzo;
-
- percent = (double)zlib_len / (double)lzo_len;
- percent *= 100;
- if (percent > 100 - c->favor_percent)
- goto select_lzo;
- goto select_zlib;
- }
-
- if (lzo_ret)
- /* Only zlib compressor succeeded */
- goto select_zlib;
-
- /* Only LZO compressor succeeded */
-
-select_lzo:
- *out_len = lzo_len;
- *type = MKFS_UBIFS_COMPR_LZO;
- return 0;
-
-select_zlib:
- *out_len = zlib_len;
- *type = MKFS_UBIFS_COMPR_ZLIB;
- memcpy(out_buf, zlib_buf, zlib_len);
- return 0;
-}
-
-int compress_data(void *in_buf, size_t in_len, void *out_buf, size_t *out_len,
- int type)
-{
- int ret;
-
- if (in_len < UBIFS_MIN_COMPR_LEN) {
- no_compress(in_buf, in_len, out_buf, out_len);
- return MKFS_UBIFS_COMPR_NONE;
- }
-
- if (c->favor_lzo)
- ret = favor_lzo_compress(in_buf, in_len, out_buf, out_len, &type);
- else {
- switch (type) {
- case MKFS_UBIFS_COMPR_LZO:
- ret = lzo_compress(in_buf, in_len, out_buf, out_len);
- break;
- case MKFS_UBIFS_COMPR_ZLIB:
- ret = zlib_deflate(in_buf, in_len, out_buf, out_len);
- break;
- case MKFS_UBIFS_COMPR_NONE:
- ret = 1;
- break;
- default:
- errcnt += 1;
- ret = 1;
- break;
- }
- }
- if (ret || *out_len >= in_len) {
- no_compress(in_buf, in_len, out_buf, out_len);
- return MKFS_UBIFS_COMPR_NONE;
- }
- return type;
-}
-
-int init_compression(void)
-{
- lzo_mem = malloc(LZO1X_999_MEM_COMPRESS);
- if (!lzo_mem)
- return -1;
-
- zlib_buf = malloc(UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR);
- if (!zlib_buf) {
- free(lzo_mem);
- return -1;
- }
-
- return 0;
-}
-
-void destroy_compression(void)
-{
- free(zlib_buf);
- free(lzo_mem);
- if (errcnt)
- fprintf(stderr, "%llu compression errors occurred\n", errcnt);
-}