The Tor Browser / file comparison
comparison: toolkit/mozapps/update/updater/bspatch.h
toolkit/mozapps/update/updater/bspatch.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:fac3b55a6c0b |
|---|---|
| 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 */ | |
| 31 | |
| 32 #ifndef bspatch_h__ | |
| 33 #define bspatch_h__ | |
| 34 | |
| 35 #include <stdint.h> | |
| 36 #include <stdio.h> | |
| 37 | |
| 38 typedef struct MBSPatchHeader_ { | |
| 39 /* "MBDIFF10" */ | |
| 40 char tag[8]; | |
| 41 | |
| 42 /* Length of the file to be patched */ | |
| 43 uint32_t slen; | |
| 44 | |
| 45 /* CRC32 of the file to be patched */ | |
| 46 uint32_t scrc32; | |
| 47 | |
| 48 /* Length of the result file */ | |
| 49 uint32_t dlen; | |
| 50 | |
| 51 /* Length of the control block in bytes */ | |
| 52 uint32_t cblen; | |
| 53 | |
| 54 /* Length of the diff block in bytes */ | |
| 55 uint32_t difflen; | |
| 56 | |
| 57 /* Length of the extra block in bytes */ | |
| 58 uint32_t extralen; | |
| 59 | |
| 60 /* Control block (MBSPatchTriple[]) */ | |
| 61 /* Diff block (binary data) */ | |
| 62 /* Extra block (binary data) */ | |
| 63 } MBSPatchHeader; | |
| 64 | |
| 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); | |
| 72 | |
| 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); | |
| 86 | |
| 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; | |
| 92 | |
| 93 #endif // bspatch_h__ |
