Function xmlAutomataNewOnceTrans

ThirdParty/libxml2/vtklibxml2/xmlregexp.c:6094–6139

* xmlAutomataNewOnceTrans: * @am: an automata * @from: the starting point of the transition * @to: the target point of the transition or NULL * @token: the input string associated to that transition * @min: the minimum successive occurrences of token * @max: the maximum successive occurrences of token * @data: data associated to the transition * * If @to is NULL, this creates first a n

 * Returns the target state or NULL in case of error
 */
xmlAutomataStatePtr
xmlAutomataNewOnceTrans(xmlAutomataPtr am, xmlAutomataStatePtr from,
			 xmlAutomataStatePtr to, const xmlChar *token,
			 int min, int max, void *data) {
    xmlRegAtomPtr atom;
    int counter;

    if ((am == NULL) || (from == NULL) || (token == NULL))
	return(NULL);
    if (min < 1)
	return(NULL);
    if (max < min)
	return(NULL);
    atom = xmlRegNewAtom(am, XML_REGEXP_STRING);
    if (atom == NULL)
	return(NULL);
    atom->valuep = xmlStrdup(token);
    atom->data = data;
    atom->quant = XML_REGEXP_QUANT_ONCEONLY;
    atom->min = min;
    atom->max = max;
    /*
     * associate a counter to the transition.
     */
    counter = xmlRegGetCounter(am);
    if (counter < 0)
        goto error;
    am->counters[counter].min = 1;
    am->counters[counter].max = 1;

    /* xmlFAGenerateTransitions(am, from, to, atom); */
    if (to == NULL) {
	to = xmlRegStatePush(am);
        if (to == NULL)
            goto error;
    }
    xmlRegStateAddTrans(am, from, atom, to, counter, -1);
    if (xmlRegAtomPush(am, atom) < 0)
        goto error;
    am->state = to;
    return(to);

error:
    xmlRegFreeAtom(atom);
    return(NULL);
}

/**
 * xmlAutomataNewState: