Function xmlParserGrow

ThirdParty/libxml2/vtklibxml2/parserInternals.c:440–480

* xmlParserGrow: * @ctxt: an XML parser context * * Grow the input buffer. * * Returns the number of bytes read or -1 in case of error. */

 * Returns the number of bytes read or -1 in case of error.
 */
int
xmlParserGrow(xmlParserCtxtPtr ctxt) {
    xmlParserInputPtr in = ctxt->input;
    xmlParserInputBufferPtr buf = in->buf;
    size_t curEnd = in->end - in->cur;
    size_t curBase = in->cur - in->base;
    size_t maxLength = (ctxt->options & XML_PARSE_HUGE) ?
                       XML_MAX_HUGE_LENGTH :
                       XML_MAX_LOOKUP_LIMIT;
    int ret;

    if (buf == NULL)
        return(0);
    /* Don't grow push parser buffer. */
    if (PARSER_PROGRESSIVE(ctxt))
        return(0);
    /* Don't grow memory buffers. */
    if ((buf->encoder == NULL) && (buf->readcallback == NULL))
        return(0);
    if (buf->error != 0)
        return(-1);

    if (curBase > maxLength) {
        xmlFatalErr(ctxt, XML_ERR_RESOURCE_LIMIT,
                    "Buffer size limit exceeded, try XML_PARSE_HUGE\n");
        xmlHaltParser(ctxt);
	return(-1);
    }

    if (curEnd >= INPUT_CHUNK)
        return(0);

    ret = xmlParserInputBufferGrow(buf, INPUT_CHUNK);
    xmlBufUpdateInput(buf->buffer, in, curBase);

    if (ret < 0) {
        xmlCtxtErrIO(ctxt, buf->error, NULL);
    }

    return(ret);
}

/**
 * xmlParserInputGrow: