Function subst_uri_f

modules/textops/textops.c:513–546

sed-perl style re: s/regular expression/replacement/flags, like * subst but works on the message uri */

/* sed-perl style re: s/regular expression/replacement/flags, like
 *  subst but works on the message uri */
static int subst_uri_f(struct sip_msg* msg, struct subst_expr *se)
{
	char* tmp;
	int len;
	char c;
	str* result;

	if (msg->new_uri.s){
		len=msg->new_uri.len;
		tmp=msg->new_uri.s;
	}else{
		tmp=msg->first_line.u.request.uri.s;
		len	=msg->first_line.u.request.uri.len;
	};
	/* ugly hack: 0 s[len], and restore it afterward
	 * (our re functions require 0 term strings), we can do this
	 * because we always alloc len+1 (new_uri) and for first_line, the
	 * message will always be > uri.len */
	c=tmp[len];
	tmp[len]=0;
	result=subst_str(tmp, msg, se, 0); /* pkg malloc'ed result */
	tmp[len]=c;
	if (result){
		LM_DBG("%s match - old uri= [%.*s], new uri= [%.*s]\n",
				exports.name, len, tmp,
				(result->len)?result->len:0,(result->s)?result->s:"");
		if (msg->new_uri.s) pkg_free(msg->new_uri.s);
		msg->new_uri=*result;
		msg->parsed_uri_ok=0; /* reset "use cached parsed uri" flag */
		pkg_free(result); /* free str* pointer */
		return 1; /* success */
	}
	return -1; /* false, no subst. made */
}