diff options
Diffstat (limited to 'patchlib/bspatch.c')
| -rw-r--r-- | patchlib/bspatch.c | 303 |
1 files changed, 0 insertions, 303 deletions
diff --git a/patchlib/bspatch.c b/patchlib/bspatch.c deleted file mode 100644 index e8469edc..00000000 --- a/patchlib/bspatch.c +++ /dev/null @@ -1,303 +0,0 @@ -/*- - * Copyright 2003-2005 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. - */ - -#ifdef _MSC_VER - // bogus 'secure' nonsense - #define _CRT_SECURE_NO_WARNINGS - // bogus signed/unsigned mismatch - #pragma warning( disable: 4018) -#endif - -#ifdef _WIN32 - #include <sys/types.h> - #define ssize_t size_t -#else - #include <unistd.h> -#endif - -#if defined __APPLE__ && defined __MACH__ - typedef unsigned char u_char; -#endif - -#include "bzlib.h" -#include "bspatch.h" -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <fcntl.h> - -static off_t offtin(u_char *buf) -{ - off_t y; - - y=buf[7]&0x7F; - y=y*256;y+=buf[6]; - y=y*256;y+=buf[5]; - y=y*256;y+=buf[4]; - y=y*256;y+=buf[3]; - y=y*256;y+=buf[2]; - y=y*256;y+=buf[1]; - y=y*256;y+=buf[0]; - - if(buf[7]&0x80) y=-y; - - return y; -} - -int bspatch(const char * oldfile, const char * newfile, const char * patchfile) -{ - FILE * f, * cpf, * dpf, * epf; - BZFILE * cpfbz2, * dpfbz2, * epfbz2; - int cbz2err, dbz2err, ebz2err; - FILE * temp; - ssize_t oldsize,newsize; - ssize_t bzctrllen,bzdatalen; - unsigned char header[32],buf[8]; - unsigned char *old_contents; - unsigned char *new_contents; - off_t oldpos,newpos; - off_t ctrl[3]; - off_t lenread; - off_t i; - - /* Open patch file */ - if ((f = fopen(patchfile, "rb")) == NULL) - { - //err(1, "fopen(%s)", argv[3]); - return ERR_OTHER; - } - - /* - File format: - 0 8 "BSDIFF40" - 8 8 X - 16 8 Y - 24 8 sizeof(newfile) - 32 X bzip2(control block) - 32+X Y bzip2(diff block) - 32+X+Y ??? bzip2(extra block) - with control block a set of triples (x,y,z) meaning "add x bytes - from oldfile to x bytes from the diff block; copy y bytes from the - extra block; seek forwards in oldfile by z bytes". - */ - - /* Read header */ - if (fread(header, 1, 32, f) < 32) - { - if (feof(f)) - { - //errx(1, "Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - //err(1, "fread(%s)", argv[3]); - return ERR_OTHER; - } - - /* Check for appropriate magic */ - if (memcmp(header, "BSDIFF40", 8) != 0) - { - //errx(1, "Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Read lengths from header */ - bzctrllen=offtin(header+8); - bzdatalen=offtin(header+16); - newsize=offtin(header+24); - if((bzctrllen<0) || (bzdatalen<0) || (newsize<0)) - { - //errx(1,"Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Close patch file and re-open it via libbzip2 at the right places */ - if (fclose(f)) - { - //err(1, "fclose(%s)", argv[3]); - return ERR_OTHER; - } - if ((cpf = fopen(patchfile, "rb")) == NULL) - { - //err(1, "fopen(%s)", argv[3]); - return ERR_OTHER; - } - if (fseek(cpf, 32, SEEK_SET)) - { - // err(1, "fseeko(%s, %lld)", argv[3], (long long)32); - return ERR_OTHER; - } - if ((cpfbz2 = BZ2_bzReadOpen(&cbz2err, cpf, 0, 0, NULL, 0)) == NULL) - { - //errx(1, "BZ2_bzReadOpen, bz2err = %d", cbz2err); - return ERR_OTHER; - } - if ((dpf = fopen(patchfile, "rb")) == NULL) - { - //err(1, "fopen(%s)", argv[3]); - return ERR_OTHER; - } - if (fseek(dpf, 32 + bzctrllen, SEEK_SET)) - { - //err(1, "fseeko(%s, %lld)", argv[3], (long long)(32 + bzctrllen)); - return ERR_OTHER; - } - if ((dpfbz2 = BZ2_bzReadOpen(&dbz2err, dpf, 0, 0, NULL, 0)) == NULL) - { - //errx(1, "BZ2_bzReadOpen, bz2err = %d", dbz2err); - return ERR_OTHER; - } - if ((epf = fopen(patchfile, "rb")) == NULL) - { - //err(1, "fopen(%s)", argv[3]); - return ERR_OTHER; - } - if (fseek(epf, 32 + bzctrllen + bzdatalen, SEEK_SET)) - { - //err(1, "fseeko(%s, %lld)", argv[3], (long long)(32 + bzctrllen + bzdatalen)); - return ERR_OTHER; - } - if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL) - { - //errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err); - return ERR_OTHER; - } - - if((temp=fopen(oldfile,"rb")) == NULL) - { - return ERR_OTHER; - } - if((fseek(temp,0,SEEK_END))!=0) - { - return ERR_OTHER; - } - oldsize = ftell(temp); - if((old_contents=malloc(oldsize+1))==NULL) - { - return ERR_OTHER; - } - rewind(temp); - if(fread(old_contents,oldsize,1,temp)!=1) - { - return ERR_OTHER; - } - if(fclose(temp)==EOF) - { - return ERR_OTHER; - } - if((new_contents=malloc(newsize+1))==NULL) - { - //err(1,NULL); - return ERR_OTHER; - } - - oldpos=0;newpos=0; - while(newpos<newsize) - { - /* Read control data */ - for(i=0;i<=2;i++) { - lenread = BZ2_bzRead(&cbz2err, cpfbz2, buf, 8); - if ((lenread < 8) || ((cbz2err != BZ_OK) && (cbz2err != BZ_STREAM_END))) - { - //errx(1, "Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - ctrl[i]=offtin(buf); - }; - - /* Sanity-check */ - if(newpos+ctrl[0]>newsize) - { - //errx(1,"Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Read diff string */ - lenread = BZ2_bzRead(&dbz2err, dpfbz2, new_contents + newpos, ctrl[0]); - if ((lenread < ctrl[0]) || ((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END))) - { - //errx(1, "Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Add old data to diff string */ - for(i=0;i<ctrl[0];i++) - { - if((oldpos+i>=0) && (oldpos+i<oldsize)) - { - new_contents[newpos+i]+=old_contents[oldpos+i]; - } - } - - /* Adjust pointers */ - newpos+=ctrl[0]; - oldpos+=ctrl[0]; - - /* Sanity-check */ - if(newpos+ctrl[1]>newsize) - { - //errx(1,"Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Read extra string */ - lenread = BZ2_bzRead(&ebz2err, epfbz2, new_contents + newpos, ctrl[1]); - if ((lenread < ctrl[1]) || ((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END))) - { - //errx(1, "Corrupt patch\n"); - return ERR_CORRUPT_PATCH; - } - - /* Adjust pointers */ - newpos+=ctrl[1]; - oldpos+=ctrl[2]; - }; - - /* Clean up the bzip2 reads */ - BZ2_bzReadClose(&cbz2err, cpfbz2); - BZ2_bzReadClose(&dbz2err, dpfbz2); - BZ2_bzReadClose(&ebz2err, epfbz2); - if (fclose(cpf) || fclose(dpf) || fclose(epf)) - { - //err(1, "fclose(%s)", argv[3]); - return ERR_OTHER; - } - - /* Write the new file */ - if( - ((temp=fopen(newfile,"wb"))==NULL) || - (fwrite(new_contents,newsize,1,temp)==0) || - (fclose(temp)==EOF) - ) - { - //err(1,"%s",argv[2]); - return ERR_OTHER; - } - - free(new_contents); - free(old_contents); - - return ERR_NONE; -} |