Function xmlByteConsumed

ThirdParty/libxml2/vtklibxml2/encoding.c:2727–2765

* xmlByteConsumed: * @ctxt: an XML parser context * * This function provides the current index of the parser relative * to the start of the current entity. This function is computed in * bytes from the beginning starting at zero and finishing at the * size in byte of the file if parsing a file. The function is * of constant cost if the input is UTF-8 but can be costly if run * on non-UTF-8

 *         in case the index could not be computed.
 */
long
xmlByteConsumed(xmlParserCtxtPtr ctxt) {
    xmlParserInputPtr in;

    if (ctxt == NULL) return(-1);
    in = ctxt->input;
    if (in == NULL)  return(-1);
    if ((in->buf != NULL) && (in->buf->encoder != NULL)) {
        unsigned int unused = 0;
	xmlCharEncodingHandler * handler = in->buf->encoder;
        /*
	 * Encoding conversion, compute the number of unused original
	 * bytes from the input not consumed and subtract that from
	 * the raw consumed value, this is not a cheap operation
	 */
        if (in->end - in->cur > 0) {
	    unsigned char convbuf[32000];
	    const unsigned char *cur = (const unsigned char *)in->cur;
	    int toconv = in->end - in->cur, written = 32000;

	    int ret;

            do {
                toconv = in->end - cur;
                written = 32000;
                ret = xmlEncOutputChunk(handler, &convbuf[0], &written,
                                        cur, &toconv);
                if ((ret != XML_ENC_ERR_SUCCESS) && (ret != XML_ENC_ERR_SPACE))
                    return(-1);
                unused += written;
                cur += toconv;
            } while (ret == XML_ENC_ERR_SPACE);
	}
	if (in->buf->rawconsumed < unused)
	    return(-1);
	return(in->buf->rawconsumed - unused);
    }
    return(in->consumed + (in->cur - in->base));
}

#if !defined(LIBXML_ICONV_ENABLED) && !defined(LIBXML_ICU_ENABLED)
#ifdef LIBXML_ISO8859X_ENABLED