void squeeze2(char s1[] /* mutable string only */, char* s2 /* mutable or immutable string would do */)
{
// create a binary hash out of (unique) characters from s2
Bool binaryhash[NOOFCHARS] = {0};
createhash(binaryhash, s2);
// in a single iteration on the length of the source string, copy all the characters which are not present in the binary hash back into the source string.
int i, j;
char x;
for(i = j = 0; x = *(s1 + i); i++)
if(!*(binaryhash + x))
*(s1 + j++) = x;
*(s1 + j) = '\0';
}
int
main(int argc, char **argv)
{
int ch, version = 0;
extern char build_info[];
struct hashinfo *hashinfo = 0;
while ((ch = getopt(argc, argv, "cdvhnD:")) != -1)
switch(ch) {
case 'c':
create++;
break;
case 'D':
if (strcmp(optarg, "md5") == 0)
hashtype = HASH_TYPE_MD5;
else if (strcmp(optarg, "sha1") == 0)
hashtype = HASH_TYPE_SHA1;
else {
fprintf(stderr, "Invalid digest type `%s'\n",
optarg);
usage();
}
break;
case 'd':
detail++;
break;
case 'n':
nothreads++;
break;
case 'v':
version++;
break;
case 'h':
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (version || detail) {
fprintf(stderr, "%s\n", build_info);
if (version)
exit(0);
}
if ((create && argc < 1) || (!create && argc < 2))
usage();
/*
* Ensure we can open both files before we do the expensive stuff.
*/
if (strcmp(argv[0], "-") != 0 && access(argv[0], R_OK) != 0) {
perror("image file");
exit(1);
}
if (!create && access(argv[1], R_OK) != 0) {
perror("device file");
exit(1);
}
/*
* Create a hash file
*/
if (create) {
if (createhash(argv[0], &hashinfo))
exit(2);
dumphash(argv[0], hashinfo);
exit(0);
}
/*
* Compare the hash file versus a device
*/
if (gethashinfo(argv[0], &hashinfo))
exit(2);
dumphash(argv[0], hashinfo);
(void) checkhash(argv[1], hashinfo);
exit(0);
}
