void crunch(struct membuf *inbuf,
struct membuf *outbuf,
struct crunch_options *options, /* IN */
struct crunch_info *info) /* OUT */
{
int outpos;
reverse_buffer(membuf_get(inbuf), membuf_memlen(inbuf));
outpos = membuf_memlen(outbuf);
crunch_backwards(inbuf, outbuf, options, info);
reverse_buffer(membuf_get(inbuf), membuf_memlen(inbuf));
reverse_buffer((char*)membuf_get(outbuf) + outpos,
membuf_memlen(outbuf) - outpos);
}
static
void level(const char *appl, int argc, char *argv[])
{
char flags_arr[32];
int forward_mode = 0;
int literal_sequences_used = 0;
int max_safety = 0;
int c;
int infilec;
char **infilev;
struct crunch_options options[1] = { CRUNCH_OPTIONS_DEFAULT };
struct common_flags flags[1] = {{NULL, DEFAULT_OUTFILE}};
struct membuf in[1];
struct membuf out[1];
flags->options = options;
LOG(LOG_DUMP, ("flagind %d\n", flagind));
sprintf(flags_arr, "f%s", CRUNCH_FLAGS);
while ((c = getflag(argc, argv, flags_arr)) != -1)
{
LOG(LOG_DUMP, (" flagind %d flagopt '%c'\n", flagind, c));
switch (c)
{
case 'f':
forward_mode = 1;
break;
default:
handle_crunch_flags(c, flagarg, print_level_usage, appl, flags);
}
}
membuf_init(in);
membuf_init(out);
infilev = argv + flagind;
infilec = argc - flagind;
if (infilec == 0)
{
LOG(LOG_ERROR, ("Error: no input files to process.\n"));
print_level_usage(appl, LOG_NORMAL, DEFAULT_OUTFILE);
exit(1);
}
/* append the files instead of merging them */
for(c = 0; c < infilec; ++c)
{
struct crunch_info info[1];
int in_load;
int in_len;
int out_pos;
out_pos = membuf_memlen(out);
in_load = do_load(infilev[c], in);
in_len = membuf_memlen(in);
if(forward_mode)
{
/* append the starting address of decrunching */
membuf_append_char(out, in_load >> 8);
membuf_append_char(out, in_load & 255);
crunch(in, out, options, info);
}
else
{
crunch_backwards(in, out, options, info);
/* append the starting address of decrunching */
membuf_append_char(out, (in_load + in_len) & 255);
membuf_append_char(out, (in_load + in_len) >> 8);
/* reverse the just appended segment of the out buffer */
reverse_buffer((char*)membuf_get(out) + out_pos,
membuf_memlen(out) - out_pos);
}
if(info->literal_sequences_used)
{
literal_sequences_used = 1;
}
if(info->needed_safety_offset > max_safety)
{
max_safety = info->needed_safety_offset;
}
}
