Function xmlTextReaderPreservePattern

ThirdParty/libxml2/vtklibxml2/xmlreader.c:4003–4040

* xmlTextReaderPreservePattern: * @reader: the xmlTextReaderPtr used * @pattern: an XPath subset pattern * @namespaces: the prefix definitions, array of [URI, prefix] or NULL * * This tells the XML Reader to preserve all nodes matched by the * pattern. The caller must also use xmlTextReaderCurrentDoc() to * keep an handle on the resulting document once parsing has finished * * Returns a

 * Returns a non-negative number in case of success and -1 in case of error
 */
int
xmlTextReaderPreservePattern(xmlTextReaderPtr reader, const xmlChar *pattern,
                             const xmlChar **namespaces)
{
    xmlPatternPtr comp;

    if ((reader == NULL) || (pattern == NULL))
	return(-1);

    comp = xmlPatterncompile(pattern, reader->dict, 0, namespaces);
    if (comp == NULL)
        return(-1);

    if (reader->patternMax <= 0) {
	reader->patternMax = 4;
	reader->patternTab = (xmlPatternPtr *) xmlMalloc(reader->patternMax *
					      sizeof(reader->patternTab[0]));
        if (reader->patternTab == NULL) {
            xmlTextReaderErrMemory(reader);
            return (-1);
        }
    }
    if (reader->patternNr >= reader->patternMax) {
        xmlPatternPtr *tmp;
        reader->patternMax *= 2;
	tmp = (xmlPatternPtr *) xmlRealloc(reader->patternTab,
                                      reader->patternMax *
                                      sizeof(reader->patternTab[0]));
        if (tmp == NULL) {
            xmlTextReaderErrMemory(reader);
	    reader->patternMax /= 2;
            return (-1);
        }
	reader->patternTab = tmp;
    }
    reader->patternTab[reader->patternNr] = comp;
    return(reader->patternNr++);
}
#endif

/**