Function xmlCharEncOutput

ThirdParty/libxml2/vtklibxml2/encoding.c:2432–2539

* xmlCharEncOutput: * @output: a parser output buffer * @init: is this an initialization call without data * * Generic front-end for the encoding handler on parser output * a first call with @init == 1 has to be made first to initiate the * output in case of non-stateless encoding needing to initiate their * state or the output (like the BOM in UTF16). * In case of UTF8 sequence conversion

 * Returns the number of bytes written or an XML_ENC_ERR code.
 */
int
xmlCharEncOutput(xmlOutputBufferPtr output, int init)
{
    int ret;
    size_t written;
    int writtentot = 0;
    size_t toconv;
    int c_in;
    int c_out;
    xmlBufPtr in;
    xmlBufPtr out;

    if ((output == NULL) || (output->encoder == NULL) ||
        (output->buffer == NULL) || (output->conv == NULL))
        return(XML_ENC_ERR_INTERNAL);
    out = output->conv;
    in = output->buffer;

retry:

    written = xmlBufAvail(out);

    /*
     * First specific handling of the initialization call
     */
    if (init) {
        c_in = 0;
        c_out = written;
        /* TODO: Check return value. */
        xmlEncOutputChunk(output->encoder, xmlBufEnd(out), &c_out,
                          NULL, &c_in);
        xmlBufAddLen(out, c_out);
        return(c_out);
    }

    /*
     * Conversion itself.
     */
    toconv = xmlBufUse(in);
    if (toconv > 64 * 1024)
        toconv = 64 * 1024;
    if (toconv * 4 >= written) {
        if (xmlBufGrow(out, toconv * 4) < 0) {
            ret = XML_ENC_ERR_MEMORY;
            goto error;
        }
        written = xmlBufAvail(out);
    }
    if (written > 256 * 1024)
        written = 256 * 1024;

    c_in = toconv;
    c_out = written;
    ret = xmlEncOutputChunk(output->encoder, xmlBufEnd(out), &c_out,
                            xmlBufContent(in), &c_in);
    xmlBufShrink(in, c_in);
    xmlBufAddLen(out, c_out);
    writtentot += c_out;