Function xmlFARegExecSave

ThirdParty/libxml2/vtklibxml2/xmlregexp.c:3032–3085

 ************************************************************************/

static void
xmlFARegExecSave(xmlRegExecCtxtPtr exec) {
#ifdef MAX_PUSH
    if (exec->nbPush > MAX_PUSH) {
        exec->status = XML_REGEXP_INTERNAL_LIMIT;
        return;
    }
    exec->nbPush++;
#endif

    if (exec->maxRollbacks == 0) {
	exec->maxRollbacks = 4;
	exec->rollbacks = (xmlRegExecRollback *) xmlMalloc(exec->maxRollbacks *
		                             sizeof(xmlRegExecRollback));
	if (exec->rollbacks == NULL) {
	    exec->maxRollbacks = 0;
            exec->status = XML_REGEXP_OUT_OF_MEMORY;
	    return;
	}
	memset(exec->rollbacks, 0,
	       exec->maxRollbacks * sizeof(xmlRegExecRollback));
    } else if (exec->nbRollbacks >= exec->maxRollbacks) {
	xmlRegExecRollback *tmp;
	int len = exec->maxRollbacks;

	exec->maxRollbacks *= 2;
	tmp = (xmlRegExecRollback *) xmlRealloc(exec->rollbacks,
			exec->maxRollbacks * sizeof(xmlRegExecRollback));
	if (tmp == NULL) {
	    exec->maxRollbacks /= 2;
            exec->status = XML_REGEXP_OUT_OF_MEMORY;
	    return;
	}
	exec->rollbacks = tmp;
	tmp = &exec->rollbacks[len];
	memset(tmp, 0, (exec->maxRollbacks - len) * sizeof(xmlRegExecRollback));
    }
    exec->rollbacks[exec->nbRollbacks].state = exec->state;
    exec->rollbacks[exec->nbRollbacks].index = exec->index;
    exec->rollbacks[exec->nbRollbacks].nextbranch = exec->transno + 1;
    if (exec->comp->nbCounters > 0) {
	if (exec->rollbacks[exec->nbRollbacks].counts == NULL) {
	    exec->rollbacks[exec->nbRollbacks].counts = (int *)
		xmlMalloc(exec->comp->nbCounters * sizeof(int));
	    if (exec->rollbacks[exec->nbRollbacks].counts == NULL) {
		exec->status = XML_REGEXP_OUT_OF_MEMORY;
		return;
	    }
	}
	memcpy(exec->rollbacks[exec->nbRollbacks].counts, exec->counts,
	       exec->comp->nbCounters * sizeof(int));
    }
    exec->nbRollbacks++;
}

static void
xmlFARegExecRollBack(xmlRegExecCtxtPtr exec) {