Function xmlDocDumpFormatMemoryEnc

ThirdParty/libxml2/vtklibxml2/xmlsave.c:2634–2705

 */

void
xmlDocDumpFormatMemoryEnc(xmlDocPtr out_doc, xmlChar **doc_txt_ptr,
		int * doc_txt_len, const char * txt_encoding,
		int format) {
    xmlSaveCtxt ctxt;
    int                         dummy = 0;
    xmlOutputBufferPtr          out_buff = NULL;
    xmlCharEncodingHandlerPtr   conv_hdlr = NULL;

    if (doc_txt_len == NULL) {
        doc_txt_len = &dummy;   /*  Continue, caller just won't get length */
    }

    if (doc_txt_ptr == NULL) {
        *doc_txt_len = 0;
        return;
    }

    *doc_txt_ptr = NULL;
    *doc_txt_len = 0;

    if (out_doc == NULL) {
        /*  No document, no output  */
        return;
    }

    /*
     *  Validate the encoding value, if provided.
     *  This logic is copied from xmlSaveFileEnc.
     */

    if (txt_encoding == NULL)
	txt_encoding = (const char *) out_doc->encoding;
    if (txt_encoding != NULL) {
        int res;

	res = xmlOpenCharEncodingHandler(txt_encoding, /* output */ 1,
                                         &conv_hdlr);
	if (res != XML_ERR_OK) {
            xmlSaveErr(NULL, res, NULL, txt_encoding);
	    return;
	}
    }

    if ((out_buff = xmlAllocOutputBuffer(conv_hdlr)) == NULL ) {
        xmlSaveErrMemory(NULL);
        xmlCharEncCloseFunc(conv_hdlr);
        return;
    }

    memset(&ctxt, 0, sizeof(ctxt));
    ctxt.buf = out_buff;
    ctxt.level = 0;
    ctxt.format = format ? 1 : 0;
    ctxt.encoding = (const xmlChar *) txt_encoding;
    xmlSaveCtxtInit(&ctxt);
    ctxt.options |= XML_SAVE_AS_XML;
    xmlDocContentDumpOutput(&ctxt, out_doc);