Function xmlExpandPEsInEntityValue

ThirdParty/libxml2/vtklibxml2/parser.c:3741–3880

* xmlExpandPEsInEntityValue: * @ctxt: parser context * @buf: string buffer * @str: entity value * @length: size of entity value * @depth: nesting depth * * Validate an entity value and expand parameter entities. */

 * Validate an entity value and expand parameter entities.
 */
static void
xmlExpandPEsInEntityValue(xmlParserCtxtPtr ctxt, xmlSBuf *buf,
                          const xmlChar *str, int length, int depth) {
    int maxDepth = (ctxt->options & XML_PARSE_HUGE) ? 40 : 20;
    const xmlChar *end, *chunk;
    int c, l;

    if (str == NULL)
        return;

    depth += 1;
    if (depth > maxDepth) {
	xmlFatalErrMsg(ctxt, XML_ERR_RESOURCE_LIMIT,
                       "Maximum entity nesting depth exceeded");
	return;
    }

    end = str + length;
    chunk = str;

    while ((str < end) && (!PARSER_STOPPED(ctxt))) {
        c = *str;

        if (c >= 0x80) {
            l = xmlUTF8MultibyteLen(ctxt, str,
                    "invalid character in entity value\n");
            if (l == 0) {
                if (chunk < str)
                    xmlSBufAddString(buf, chunk, str - chunk);
                xmlSBufAddReplChar(buf);
                str += 1;
                chunk = str;
            } else {
                str += l;
            }
        } else if (c == '&') {
            if (str[1] == '#') {
                if (chunk < str)
                    xmlSBufAddString(buf, chunk, str - chunk);

                c = xmlParseStringCharRef(ctxt, &str);
                if (c == 0)
                    return;

                xmlSBufAddChar(buf, c);

                chunk = str;
            } else {
                xmlChar *name;

                /*
                 * General entity references are checked for
                 * syntactic validity.
                 */
                str++;
                name = xmlParseStringName(ctxt, &str);

                if ((name == NULL) || (*str++ != ';')) {