#include <string.h>
#include <stdarg.h>
#include "RANAP_PDU_Descriptions.hh"

extern "C" {
#include <fftranscode/transcode.h>
}

namespace RANAP__Types {

TTCN_Module RANAP__EncDec("RANAP_EncDec", __DATE__, __TIME__);

OCTETSTRING enc__RANAP__PDU(const RANAP__PDU__Descriptions::RANAP__PDU &pdu)
{
	uint8_t *aper_buf;
	int aper_buf_len;
	TTCN_Buffer TTCN_buf;
	TTCN_buf.clear();

	/* Encode from abstract data type into BER/DER */
	pdu.encode(RANAP__PDU__Descriptions::RANAP__PDU_descr_, TTCN_buf,
		   TTCN_EncDec::CT_BER, BER_ENCODE_DER);

	aper_buf_len = fftranscode_ber2aper(FFTRANSC_T_RANAP, &aper_buf, TTCN_buf.get_data(), TTCN_buf.get_len());
	if (aper_buf_len < 0) {
		TTCN_Logger::begin_event_log2str();
		TTCN_buf.log();
		TTCN_error("fftranscode_ber2aper failed: %s", (const char *) TTCN_Logger::end_event_log2str());
	}

	/* make octetstring from output buffer */
	OCTETSTRING ret_val(aper_buf_len, aper_buf);

	/* release dynamically-allocated output buffer */
	fftranscode_free(aper_buf);

	return ret_val;
}

RANAP__PDU__Descriptions::RANAP__PDU dec__RANAP__PDU(const OCTETSTRING &stream)
{
	uint8_t *ber_buf;
	int ber_buf_len;

	/* First, decode APER + re-encode as BER */
	ber_buf_len = fftranscode_aper2ber(FFTRANSC_T_RANAP, &ber_buf, (const unsigned char *)stream, stream.lengthof());
	if (ber_buf_len < 0) {
		TTCN_error("fftranscode_aper2ber failed.");
	}

	/* Then, re-encode from BER to TITAN representation */
	RANAP__PDU__Descriptions::RANAP__PDU ret_dcc;
	TTCN_Buffer TTCN_buf;
	TTCN_buf.clear();
	TTCN_buf.put_s(ber_buf_len, ber_buf);

	ret_dcc.decode(RANAP__PDU__Descriptions::RANAP__PDU_descr_, TTCN_buf,
			TTCN_EncDec::CT_BER, BER_ACCEPT_ALL);

	fftranscode_free(ber_buf);

	return ret_dcc;
}

}