1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/mozapps/update/updater/bspatch.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,93 @@
1.4 +/*-
1.5 + * Copyright 2003,2004 Colin Percival
1.6 + * All rights reserved
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted providing that the following conditions
1.10 + * are met:
1.11 + * 1. Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * 2. Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in the
1.15 + * documentation and/or other materials provided with the distribution.
1.16 + *
1.17 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1.18 + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
1.19 + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.20 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
1.21 + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.22 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.23 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.24 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
1.25 + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
1.26 + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.27 + * POSSIBILITY OF SUCH DAMAGE.
1.28 + *
1.29 + * Changelog:
1.30 + * 2005-04-26 - Define the header as a C structure, add a CRC32 checksum to
1.31 + * the header, and make all the types 32-bit.
1.32 + * --Benjamin Smedberg <benjamin@smedbergs.us>
1.33 + */
1.34 +
1.35 +#ifndef bspatch_h__
1.36 +#define bspatch_h__
1.37 +
1.38 +#include <stdint.h>
1.39 +#include <stdio.h>
1.40 +
1.41 +typedef struct MBSPatchHeader_ {
1.42 + /* "MBDIFF10" */
1.43 + char tag[8];
1.44 +
1.45 + /* Length of the file to be patched */
1.46 + uint32_t slen;
1.47 +
1.48 + /* CRC32 of the file to be patched */
1.49 + uint32_t scrc32;
1.50 +
1.51 + /* Length of the result file */
1.52 + uint32_t dlen;
1.53 +
1.54 + /* Length of the control block in bytes */
1.55 + uint32_t cblen;
1.56 +
1.57 + /* Length of the diff block in bytes */
1.58 + uint32_t difflen;
1.59 +
1.60 + /* Length of the extra block in bytes */
1.61 + uint32_t extralen;
1.62 +
1.63 + /* Control block (MBSPatchTriple[]) */
1.64 + /* Diff block (binary data) */
1.65 + /* Extra block (binary data) */
1.66 +} MBSPatchHeader;
1.67 +
1.68 +/**
1.69 + * Read the header of a patch file into the MBSPatchHeader structure.
1.70 + *
1.71 + * @param fd Must have been opened for reading, and be at the beginning
1.72 + * of the file.
1.73 + */
1.74 +int MBS_ReadHeader(FILE* file, MBSPatchHeader *header);
1.75 +
1.76 +/**
1.77 + * Apply a patch. This method does not validate the checksum of the original
1.78 + * file: client code should validate the checksum before calling this method.
1.79 + *
1.80 + * @param patchfd Must have been processed by MBS_ReadHeader
1.81 + * @param fbuffer The original file read into a memory buffer of length
1.82 + * header->slen.
1.83 + * @param filefd Must have been opened for writing. Should be truncated
1.84 + * to header->dlen if it is an existing file. The offset
1.85 + * should be at the beginning of the file.
1.86 + */
1.87 +int MBS_ApplyPatch(const MBSPatchHeader *header, FILE* patchFile,
1.88 + unsigned char *fbuffer, FILE* file);
1.89 +
1.90 +typedef struct MBSPatchTriple_ {
1.91 + uint32_t x; /* add x bytes from oldfile to x bytes from the diff block */
1.92 + uint32_t y; /* copy y bytes from the extra block */
1.93 + int32_t z; /* seek forwards in oldfile by z bytes */
1.94 +} MBSPatchTriple;
1.95 +
1.96 +#endif // bspatch_h__
