diff options
author | Dongsheng Yang <yangds.fnst@cn.fujitsu.com> | 2015-10-31 11:12:01 +0800 |
---|---|---|
committer | Brian Norris <computersforpeace@gmail.com> | 2015-11-11 14:38:40 -0800 |
commit | 7d81790ced345585b1e647ca9d0f6678e7062fa4 (patch) | |
tree | 02f61270c7a0fff7bb6b2e28f247a3d2fd6ff490 /compr_zlib.c | |
parent | 344753f2aacb94d98ce238f81fc4a4b6ef6adea9 (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 'compr_zlib.c')
-rw-r--r-- | compr_zlib.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/compr_zlib.c b/compr_zlib.c deleted file mode 100644 index 1f94628..0000000 --- a/compr_zlib.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * JFFS2 -- Journalling Flash File System, Version 2. - * - * Copyright (C) 2001 Red Hat, Inc. - * - * Created by David Woodhouse <dwmw2@cambridge.redhat.com> - * - * The original JFFS, from which the design for JFFS2 was derived, - * was designed and implemented by Axis Communications AB. - * - * The contents of this file are subject to the Red Hat eCos Public - * License Version 1.1 (the "Licence"); you may not use this file - * except in compliance with the Licence. You may obtain a copy of - * the Licence at http://www.redhat.com/ - * - * Software distributed under the Licence is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. - * See the Licence for the specific language governing rights and - * limitations under the Licence. - * - * The Original Code is JFFS2 - Journalling Flash File System, version 2 - * - * Alternatively, the contents of this file may be used under the - * terms of the GNU General Public License version 2 (the "GPL"), in - * which case the provisions of the GPL are applicable instead of the - * above. If you wish to allow the use of your version of this file - * only under the terms of the GPL and not to allow others to use your - * version of this file under the RHEPL, indicate your decision by - * deleting the provisions above and replace them with the notice and - * other provisions required by the GPL. If you do not delete the - * provisions above, a recipient may use your version of this file - * under either the RHEPL or the GPL. - */ - -#define PROGRAM_NAME "compr_zlib" - -#include <stdint.h> -#define crc32 __zlib_crc32 -#include <zlib.h> -#undef crc32 -#include <stdio.h> -#include <asm/types.h> -#include <linux/jffs2.h> -#include "common.h" -#include "compr.h" - -/* Plan: call deflate() with avail_in == *sourcelen, - avail_out = *dstlen - 12 and flush == Z_FINISH. - If it doesn't manage to finish, call it again with - avail_in == 0 and avail_out set to the remaining 12 - bytes for it to clean up. -Q: Is 12 bytes sufficient? - */ -#define STREAM_END_SPACE 12 - -static int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t *sourcelen, uint32_t *dstlen) -{ - z_stream strm; - int ret; - - if (*dstlen <= STREAM_END_SPACE) - return -1; - - strm.zalloc = (void *)0; - strm.zfree = (void *)0; - - if (Z_OK != deflateInit(&strm, 3)) { - return -1; - } - strm.next_in = data_in; - strm.total_in = 0; - - strm.next_out = cpage_out; - strm.total_out = 0; - - while (strm.total_out < *dstlen - STREAM_END_SPACE && strm.total_in < *sourcelen) { - strm.avail_out = *dstlen - (strm.total_out + STREAM_END_SPACE); - strm.avail_in = min((unsigned)(*sourcelen-strm.total_in), strm.avail_out); - ret = deflate(&strm, Z_PARTIAL_FLUSH); - if (ret != Z_OK) { - deflateEnd(&strm); - return -1; - } - } - strm.avail_out += STREAM_END_SPACE; - strm.avail_in = 0; - ret = deflate(&strm, Z_FINISH); - if (ret != Z_STREAM_END) { - deflateEnd(&strm); - return -1; - } - deflateEnd(&strm); - - if (strm.total_out >= strm.total_in) - return -1; - - - *dstlen = strm.total_out; - *sourcelen = strm.total_in; - return 0; -} - -static int jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out, - uint32_t srclen, uint32_t destlen) -{ - z_stream strm; - int ret; - - strm.zalloc = (void *)0; - strm.zfree = (void *)0; - - if (Z_OK != inflateInit(&strm)) { - return 1; - } - strm.next_in = data_in; - strm.avail_in = srclen; - strm.total_in = 0; - - strm.next_out = cpage_out; - strm.avail_out = destlen; - strm.total_out = 0; - - while((ret = inflate(&strm, Z_FINISH)) == Z_OK) - ; - - inflateEnd(&strm); - return 0; -} - -static struct jffs2_compressor jffs2_zlib_comp = { - .priority = JFFS2_ZLIB_PRIORITY, - .name = "zlib", - .disabled = 0, - .compr = JFFS2_COMPR_ZLIB, - .compress = &jffs2_zlib_compress, - .decompress = &jffs2_zlib_decompress, -}; - -int jffs2_zlib_init(void) -{ - return jffs2_register_compressor(&jffs2_zlib_comp); -} - -void jffs2_zlib_exit(void) -{ - jffs2_unregister_compressor(&jffs2_zlib_comp); -} |