Function xmlOutputBufferWrite

ThirdParty/libxml2/vtklibxml2/xmlIO.c:2440–2538

* xmlOutputBufferWrite: * @out: a buffered parser output * @len: the size in bytes of the array. * @buf: an char array * * Write the content of the array in the output I/O buffer * This routine handle the I18N transcoding from internal UTF-8 * The buffer is lossless, i.e. will store in case of partial * or delayed writes. * * Returns the number of chars immediately written, or -1 *

 *         in case of error.
 */
int
xmlOutputBufferWrite(xmlOutputBufferPtr out, int len, const char *buf) {
    int nbchars = 0; /* number of chars to output to I/O */
    int ret;         /* return from function call */
    int written = 0; /* number of char written to I/O so far */
    int chunk;       /* number of byte current processed from buf */

    if ((out == NULL) || (out->error)) return(-1);
    if (len < 0) return(0);
    if (out->error) return(-1);

    do {
	chunk = len;
	if (chunk > 4 * MINLEN)
	    chunk = 4 * MINLEN;

	/*
	 * first handle encoding stuff.
	 */
	if (out->encoder != NULL) {
	    /*
	     * Store the data in the incoming raw buffer
	     */
	    if (out->conv == NULL) {
		out->conv = xmlBufCreate();
                if (out->conv == NULL) {
                    out->error = XML_ERR_NO_MEMORY;
                    return(-1);
                }
	    }
	    ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk);
	    if (ret != 0) {
                out->error = XML_ERR_NO_MEMORY;
	        return(-1);
            }

	    if ((xmlBufUse(out->buffer) < MINLEN) && (chunk == len))
		goto done;

	    /*
	     * convert as much as possible to the parser reading buffer.
	     */
	    ret = xmlCharEncOutput(out, 0);
	    if (ret < 0)
		return(-1);
            if (out->writecallback)
	        nbchars = xmlBufUse(out->conv);
            else
                nbchars = ret >= 0 ? ret : 0;
	} else {
	    ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk);
	    if (ret != 0) {
                out->error = XML_ERR_NO_MEMORY;
	        return(-1);
            }
            if (out->writecallback)
	        nbchars = xmlBufUse(out->buffer);
            else