Function xmlCharEncInput

ThirdParty/libxml2/vtklibxml2/encoding.c:2309–2373

* xmlCharEncInput: * @input: a parser input buffer * * Generic front-end for the encoding handler on parser input * * Returns the number of bytes written or an XML_ENC_ERR code. */

 * Returns the number of bytes written or an XML_ENC_ERR code.
 */
int
xmlCharEncInput(xmlParserInputBufferPtr input)
{
    int ret;
    size_t avail;
    size_t toconv;
    int c_in;
    int c_out;
    xmlBufPtr in;
    xmlBufPtr out;
    const xmlChar *inData;
    size_t inTotal = 0;

    if ((input == NULL) || (input->encoder == NULL) ||
        (input->buffer == NULL) || (input->raw == NULL))
        return(XML_ENC_ERR_INTERNAL);
    out = input->buffer;
    in = input->raw;

    toconv = xmlBufUse(in);
    if (toconv == 0)
        return (0);
    inData = xmlBufContent(in);
    inTotal = 0;

    do {
        c_in = toconv > INT_MAX / 2 ? INT_MAX / 2 : toconv;

        avail = xmlBufAvail(out);
        if (avail > INT_MAX)
            avail = INT_MAX;
        if (avail < 4096) {
            if (xmlBufGrow(out, 4096) < 0) {
                input->error = XML_ERR_NO_MEMORY;
                return(XML_ENC_ERR_MEMORY);
            }
            avail = xmlBufAvail(out);
        }

        c_in = toconv;
        c_out = avail;
        ret = xmlEncInputChunk(input->encoder, xmlBufEnd(out), &c_out,
                               inData, &c_in);
        inTotal += c_in;
        inData += c_in;
        toconv -= c_in;
        xmlBufAddLen(out, c_out);
    } while (ret == XML_ENC_ERR_SPACE);

    xmlBufShrink(in, inTotal);

    if (input->rawconsumed > ULONG_MAX - (unsigned long)c_in)
        input->rawconsumed = ULONG_MAX;
    else
        input->rawconsumed += c_in;

    if (((ret != 0) && (c_out == 0)) ||
        (ret == XML_ENC_ERR_MEMORY)) {