/*- * Copyright 2003,2004 Colin Percival * All rights reserved * * Redistribution and use in source and binary forms, with or without * modification, are permitted providing that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Changelog: * 2005-04-26 - Define the header as a C structure, add a CRC32 checksum to * the header, and make all the types 32-bit. * --Benjamin Smedberg */ #ifndef bspatch_h__ #define bspatch_h__ #define OK 0 #define MEM_ERROR 1 // #define IO_ERROR 2 // Use READ_ERROR or WRITE_ERROR instead #define USAGE_ERROR 3 #define CRC_ERROR 4 #define PARSE_ERROR 5 #define READ_ERROR 6 #define WRITE_ERROR 7 #define UNEXPECTED_ERROR 8 typedef struct MBSPatchHeader_ { /* "MBDIFF10" */ char tag[8]; /* Length of the file to be patched */ unsigned int slen; /* CRC32 of the file to be patched */ unsigned int scrc32; /* Length of the result file */ unsigned int dlen; /* Length of the control block in bytes */ unsigned int cblen; /* Length of the diff block in bytes */ unsigned int difflen; /* Length of the extra block in bytes */ unsigned int extralen; /* Control block (MBSPatchTriple[]) */ /* Diff block (binary data) */ /* Extra block (binary data) */ } MBSPatchHeader; /** * Read the header of a patch file into the MBSPatchHeader structure. * * @param fd Must have been opened for reading, and be at the beginning * of the file. */ int MBS_ReadHeader(int fd, MBSPatchHeader *header); /** * Apply a patch. This method does not validate the checksum of the original * file: client code should validate the checksum before calling this method. * * @param patchfd Must have been processed by MBS_ReadHeader * @param fbuffer The original file read into a memory buffer of length * header->slen. * @param filefd Must have been opened for writing. Should be truncated * to header->dlen if it is an existing file. The offset * should be at the beginning of the file. */ int MBS_ApplyPatch(const MBSPatchHeader *header, int patchfd, unsigned char *fbuffer, int filefd); typedef struct MBSPatchTriple_ { unsigned int x; /* add x bytes from oldfile to x bytes from the diff block */ unsigned int y; /* copy y bytes from the extra block */ int z; /* seek forwards in oldfile by z bytes */ } MBSPatchTriple; /** * Apply the given patch file to a given source file. This method validates * the CRC of the original file stored in the patch file, before applying the * patch to it. */ int ApplyBinaryPatch(const wchar_t *old_file, const wchar_t *patch_file, const wchar_t *new_file); /** * Calculates Crc of the given buffer by calling CRC method in LZMA SDK */ int CalculateCrc(const unsigned char *buf, int size); #endif // bspatch_h__