toolkit/mozapps/update/updater/bspatch.h@6474c204b198
toolkit/mozapps/update/updater/bspatch.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /*-
2 * Copyright 2003,2004 Colin Percival
3 * All rights reserved
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted providing that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
23 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 *
26 * Changelog:
27 * 2005-04-26 - Define the header as a C structure, add a CRC32 checksum to
28 * the header, and make all the types 32-bit.
29 * --Benjamin Smedberg <benjamin@smedbergs.us>
30 */
32 #ifndef bspatch_h__
33 #define bspatch_h__
35 #include <stdint.h>
36 #include <stdio.h>
38 typedef struct MBSPatchHeader_ {
39 /* "MBDIFF10" */
40 char tag[8];
42 /* Length of the file to be patched */
43 uint32_t slen;
45 /* CRC32 of the file to be patched */
46 uint32_t scrc32;
48 /* Length of the result file */
49 uint32_t dlen;
51 /* Length of the control block in bytes */
52 uint32_t cblen;
54 /* Length of the diff block in bytes */
55 uint32_t difflen;
57 /* Length of the extra block in bytes */
58 uint32_t extralen;
60 /* Control block (MBSPatchTriple[]) */
61 /* Diff block (binary data) */
62 /* Extra block (binary data) */
63 } MBSPatchHeader;
65 /**
66 * Read the header of a patch file into the MBSPatchHeader structure.
67 *
68 * @param fd Must have been opened for reading, and be at the beginning
69 * of the file.
70 */
71 int MBS_ReadHeader(FILE* file, MBSPatchHeader *header);
73 /**
74 * Apply a patch. This method does not validate the checksum of the original
75 * file: client code should validate the checksum before calling this method.
76 *
77 * @param patchfd Must have been processed by MBS_ReadHeader
78 * @param fbuffer The original file read into a memory buffer of length
79 * header->slen.
80 * @param filefd Must have been opened for writing. Should be truncated
81 * to header->dlen if it is an existing file. The offset
82 * should be at the beginning of the file.
83 */
84 int MBS_ApplyPatch(const MBSPatchHeader *header, FILE* patchFile,
85 unsigned char *fbuffer, FILE* file);
87 typedef struct MBSPatchTriple_ {
88 uint32_t x; /* add x bytes from oldfile to x bytes from the diff block */
89 uint32_t y; /* copy y bytes from the extra block */
90 int32_t z; /* seek forwards in oldfile by z bytes */
91 } MBSPatchTriple;
93 #endif // bspatch_h__
