ref: fbd0eed489f59a6fbca4eee56eef7e3f8ad52e29
dir: /src/it/itorder.c/
/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* itorder.c - Code to fix invalid patterns in / / \ \
* the pattern table. | < / \_
* | \/ /\ /
* By Julien Cugniere. \_ / > /
* | \ / /
* | ' /
* \__/
*/
#include <stdlib.h>
#include "dumb.h"
#include "internal/it.h"
/* This function ensures that any pattern mentioned in the order table but
* not present in the pattern table is treated as an empty 64 rows pattern.
* This is done by adding such a dummy pattern at the end of the pattern
* table, and redirect invalid orders to it.
* Patterns 254 and 255 are left untouched, unless the signal is an XM.
*/
int _dumb_it_fix_invalid_orders(DUMB_IT_SIGDATA *sigdata) {
int i;
int found_some = 0;
int first_invalid = sigdata->n_patterns;
int last_invalid = (sigdata->flags & IT_WAS_AN_XM) ? 255 : 253;
for (i = 0; i < sigdata->n_orders; i++) {
if (sigdata->order[i] >= first_invalid &&
sigdata->order[i] <= last_invalid) {
sigdata->order[i] = sigdata->n_patterns;
found_some = 1;
} else if (sigdata->order[i] < first_invalid) {
IT_PATTERN *pattern = sigdata->pattern + sigdata->order[i];
if (!pattern->n_rows || (pattern->n_entries && !pattern->entry))
return -1;
}
}
if (found_some) {
IT_PATTERN *new_pattern =
realloc(sigdata->pattern,
sizeof(*sigdata->pattern) * (sigdata->n_patterns + 1));
if (!new_pattern)
return -1;
new_pattern[sigdata->n_patterns].n_rows = 64;
new_pattern[sigdata->n_patterns].n_entries = 0;
new_pattern[sigdata->n_patterns].entry = NULL;
sigdata->pattern = new_pattern;
sigdata->n_patterns++;
}
return 0;
}