Add unpatched bsdiff 4.3 to chrome/installer/mac/third_party/bsdiff

chrome/installer/mac/third_party/bsdiff/bspatch.c

+/*-
+ * 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.
+ */
+
+#if 0
+__FBSDID("$FreeBSD: src/usr.bin/bsdiff/bspatch/bspatch.c,v 1.1 2005/08/06 01:59:06 cperciva Exp $");
+#endif
+
+#include <bzlib.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+#include <unistd.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 main(int argc,char * argv[])
+{
+        FILE * f, * cpf, * dpf, * epf;
+        BZFILE * cpfbz2, * dpfbz2, * epfbz2;
+        int cbz2err, dbz2err, ebz2err;
+        int fd;
+        ssize_t oldsize,newsize;
+        ssize_t bzctrllen,bzdatalen;
+        u_char header[32],buf[8];
+        u_char *old, *new;
+        off_t oldpos,newpos;
+        off_t ctrl[3];
+        off_t lenread;
+        off_t i;
+
+        if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
+
+        /* Open patch file */
+        if ((f = fopen(argv[3], "r")) == NULL)
+                err(1, "fopen(%s)", argv[3]);
+
+        /*
+        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");
+                err(1, "fread(%s)", argv[3]);
+        }
+
+        /* Check for appropriate magic */
+        if (memcmp(header, "BSDIFF40", 8) != 0)
+                errx(1, "Corrupt patch\n");
+
+        /* 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");
+
+        /* Close patch file and re-open it via libbzip2 at the right places */
+        if (fclose(f))
+                err(1, "fclose(%s)", argv[3]);
+        if ((cpf = fopen(argv[3], "r")) == NULL)
+                err(1, "fopen(%s)", argv[3]);
+        if (fseeko(cpf, 32, SEEK_SET))
+                err(1, "fseeko(%s, %lld)", argv[3],
+                    (long long)32);
+        if ((cpfbz2 = BZ2_bzReadOpen(&cbz2err, cpf, 0, 0, NULL, 0)) == NULL)
+                errx(1, "BZ2_bzReadOpen, bz2err = %d", cbz2err);
+        if ((dpf = fopen(argv[3], "r")) == NULL)
+                err(1, "fopen(%s)", argv[3]);
+        if (fseeko(dpf, 32 + bzctrllen, SEEK_SET))
+                err(1, "fseeko(%s, %lld)", argv[3],
+                    (long long)(32 + bzctrllen));
+        if ((dpfbz2 = BZ2_bzReadOpen(&dbz2err, dpf, 0, 0, NULL, 0)) == NULL)
+                errx(1, "BZ2_bzReadOpen, bz2err = %d", dbz2err);
+        if ((epf = fopen(argv[3], "r")) == NULL)
+                err(1, "fopen(%s)", argv[3]);
+        if (fseeko(epf, 32 + bzctrllen + bzdatalen, SEEK_SET))
+                err(1, "fseeko(%s, %lld)", argv[3],
+                    (long long)(32 + bzctrllen + bzdatalen));
+        if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL)
+                errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err);
+
+        if(((fd=open(argv[1],O_RDONLY,0))<0) ||
+                ((oldsize=lseek(fd,0,SEEK_END))==-1) ||
+                ((old=malloc(oldsize+1))==NULL) ||
+                (lseek(fd,0,SEEK_SET)!=0) ||
+                (read(fd,old,oldsize)!=oldsize) ||
+                (close(fd)==-1)) err(1,"%s",argv[1]);
+        if((new=malloc(newsize+1))==NULL) err(1,NULL);
+
+        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");
+                        ctrl[i]=offtin(buf);
+                };
+
+                /* Sanity-check */
+                if(newpos+ctrl[0]>newsize)
+                        errx(1,"Corrupt patch\n");
+
+                /* Read diff string */
+                lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);
+                if ((lenread < ctrl[0]) ||
+                    ((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END)))
+                        errx(1, "Corrupt patch\n");
+
+                /* Add old data to diff string */
+                for(i=0;i<ctrl[0];i++)
+                        if((oldpos+i>=0) && (oldpos+i<oldsize))
+                                new[newpos+i]+=old[oldpos+i];
+
+                /* Adjust pointers */
+                newpos+=ctrl[0];
+                oldpos+=ctrl[0];
+
+                /* Sanity-check */
+                if(newpos+ctrl[1]>newsize)
+                        errx(1,"Corrupt patch\n");
+
+                /* Read extra string */
+                lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]);
+                if ((lenread < ctrl[1]) ||
+                    ((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END)))
+                        errx(1, "Corrupt patch\n");
+
+                /* 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]);
+
+        /* Write the new file */
+        if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY,0666))<0) ||
+                (write(fd,new,newsize)!=newsize) || (close(fd)==-1))
+                err(1,"%s",argv[2]);
+
+        free(new);
+        free(old);
+
+        return 0;
+}