Function xmlParseReference

ThirdParty/libxml2/vtklibxml2/parser.c:7318–7552

* xmlParseReference: * @ctxt: an XML parser context * * DEPRECATED: Internal function, don't use. * * parse and handle entity references in content, depending on the SAX * interface, this may end-up in a call to character() if this is a * CharRef, a predefined entity, if there is no reference() callback. * or if the parser was asked to switch to that mode. * * Always consumes '&'. * *

 * [67] Reference ::= EntityRef | CharRef
 */
void
xmlParseReference(xmlParserCtxtPtr ctxt) {
    xmlEntityPtr ent = NULL;
    const xmlChar *name;
    xmlChar *val;

    if (RAW != '&')
        return;

    /*
     * Simple case of a CharRef
     */
    if (NXT(1) == '#') {
	int i = 0;
	xmlChar out[16];
	int value = xmlParseCharRef(ctxt);

	if (value == 0)
	    return;

        /*
         * Just encode the value in UTF-8
         */
        COPY_BUF(out, i, value);
        out[i] = 0;
        if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL) &&
            (!ctxt->disableSAX))
            ctxt->sax->characters(ctxt->userData, out, i);
	return;
    }

    /*
     * We are seeing an entity reference
     */
    name = xmlParseEntityRefInternal(ctxt);
    if (name == NULL)
        return;
    ent = xmlLookupGeneralEntity(ctxt, name, /* isAttr */ 0);
    if (ent == NULL) {
        /*
         * Create a reference for undeclared entities.
         */
        if ((ctxt->replaceEntities == 0) &&
            (ctxt->sax != NULL) &&
            (ctxt->disableSAX == 0) &&
            (ctxt->sax->reference != NULL)) {
            ctxt->sax->reference(ctxt->userData, name);
        }
        return;
    }
    if (!ctxt->wellFormed)
	return;

    /* special case of predefined entities */
    if ((ent->name == NULL) ||
        (ent->etype == XML_INTERNAL_PREDEFINED_ENTITY)) {
	val = ent->content;
	if (val == NULL) return;