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Index: usr.bin/bsdiff/bspatch/bspatch.c
===================================================================
--- usr.bin/bsdiff/bspatch/bspatch.c
+++ usr.bin/bsdiff/bspatch/bspatch.c
@@ -43,16 +43,17 @@
{
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;
+ 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;
}
@@ -65,17 +66,17 @@
exit(1);
}
-int main(int argc,char * argv[])
+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];
+ int newfd, oldfd;
+ ssize_t oldsize, newsize;
+ ssize_t bzctrllen, bzdatalen;
+ u_char header[32], buf[8];
u_char *old, *new;
- off_t oldpos,newpos;
+ off_t oldpos, newpos;
off_t ctrl[3];
off_t lenread;
off_t i;
@@ -113,11 +114,11 @@
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");
+ 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))
@@ -144,32 +145,37 @@
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|O_BINARY,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) {
+ oldfd = open(argv[1], O_RDONLY | O_BINARY, 0);
+ if (oldfd < 0)
+ err(1, "%s", argv[1]);
+ if ((oldsize = lseek(oldfd, 0, SEEK_END)) == -1 ||
+ (old = malloc(oldsize+1)) == NULL ||
+ lseek(oldfd, 0, SEEK_SET) != 0 ||
+ read(oldfd, old, oldsize) != oldsize ||
+ close(oldfd) == -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++) {
+ 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);
+ ctrl[i] = offtin(buf);
}
/* Sanity-check */
if ((ctrl[0] < 0) || (ctrl[1] < 0))
- errx(1,"Corrupt patch\n");
+ errx(1, "Corrupt patch\n");
/* Sanity-check */
- if(newpos+ctrl[0]>newsize)
- errx(1,"Corrupt patch\n");
+ if (newpos + ctrl[0] > newsize)
+ errx(1, "Corrupt patch\n");
/* Read diff string */
lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);
@@ -178,17 +184,17 @@
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];
+ 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];
+ newpos += ctrl[0];
+ oldpos += ctrl[0];
/* Sanity-check */
- if(newpos+ctrl[1]>newsize)
- errx(1,"Corrupt patch\n");
+ if (newpos + ctrl[1] > newsize)
+ errx(1, "Corrupt patch\n");
/* Read extra string */
lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]);
@@ -209,9 +215,11 @@
err(1, "fclose(%s)", argv[3]);
/* Write the new file */
- if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,0666))<0) ||
- (write(fd,new,newsize)!=newsize) || (close(fd)==-1))
- err(1,"%s",argv[2]);
+ newfd = open(argv[2], O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0666);
+ if (newfd < 0)
+ err(1, "%s", argv[2]);
+ if (write(newfd, new, newsize) != newsize || close(newfd) == -1)
+ err(1, "%s", argv[2]);
free(new);
free(old);

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