Function xmlBufBackToBuffer

ThirdParty/libxml2/vtklibxml2/buf.c:867–918

* xmlBufBackToBuffer: * @buf: new buffer wrapping the old one * * Function to be called once internal processing had been done to * update back the buffer provided by the user. This can lead to * a failure in case the size accumulated in the xmlBuf is larger * than what an xmlBuffer can support on 64 bits (INT_MAX) * The xmlBufPtr @buf wrapper is deallocated by this call in any case. * *

 * Returns the old xmlBufferPtr unless the call failed and NULL is returned
 */
xmlBufferPtr
xmlBufBackToBuffer(xmlBufPtr buf) {
    xmlBufferPtr ret;

    if (buf == NULL)
        return(NULL);
    CHECK_COMPAT(buf)
    ret = buf->buffer;

    if ((buf->error) || (ret == NULL)) {
        xmlBufFree(buf);
        if (ret != NULL) {
            ret->content = NULL;
            ret->contentIO = NULL;
            ret->use = 0;
            ret->size = 0;
        }
        return(NULL);
    }

    /*
     * What to do in case of error in the buffer ???
     */
    if (buf->use > INT_MAX) {
        /*
         * Worse case, we really allocated and used more than the
         * maximum allowed memory for an xmlBuffer on this architecture.
         * Keep the buffer but provide a truncated size value.
         */
        xmlBufOverflowError(buf);
        ret->use = INT_MAX;
        ret->size = INT_MAX;
    } else if (buf->size > INT_MAX) {
        /*
         * milder case, we allocated more than the maximum allowed memory
         * for an xmlBuffer on this architecture, but used less than the
         * limit.
         * Keep the buffer but provide a truncated size value.
         */
        xmlBufOverflowError(buf);
        ret->use = buf->use;
        ret->size = INT_MAX;
    } else {
        ret->use = buf->use;
        ret->size = buf->size;
    }
    ret->alloc = buf->alloc;
    ret->content = buf->content;
    ret->contentIO = buf->contentIO;
    xmlFree(buf);
    return(ret);
}

/**
 * xmlBufResetInput: