Function if

ThirdParty/libxml2/vtklibxml2/buf.c:637–647

    if ((buf == NULL) || (buf->error))
        return(0);
    CHECK_COMPAT(buf)

    if (buf->alloc == XML_BUFFER_ALLOC_BOUNDED) {
        /*
	 * Used to provide parsing limits
	 */
        if (size >= XML_MAX_TEXT_LENGTH) {
	    xmlBufMemoryError(buf);
	    return(0);
	}
    }

    /* Don't resize if we don't have to */
    if (size < buf->size)