/*-

 * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.

 * Redistribution and modifications are permitted subject to BSD license.

 */

#ifndef	_DER_ENCODER_H_

#define	_DER_ENCODER_H_

#include <asn_application.h>

#ifdef __cplusplus

extern "C" {

#endif

struct asn_TYPE_descriptor_s;	/* Forward declaration */

/*

 * The DER encoder of any type. May be invoked by the application.

 * The ber_decode() function (ber_decoder.h) is an opposite of der_encode().

 */

asn_enc_rval_t der_encode(struct asn_TYPE_descriptor_s *type_descriptor,

		void *struct_ptr,	/* Structure to be encoded */

		asn_app_consume_bytes_f *consume_bytes_cb,

		void *app_key		/* Arbitrary callback argument */

	);

/* A variant of der_encode() which encodes data into the pre-allocated buffer */

asn_enc_rval_t der_encode_to_buffer(

		struct asn_TYPE_descriptor_s *type_descriptor,

		void *struct_ptr,	/* Structure to be encoded */

		void *buffer,		/* Pre-allocated buffer */

		size_t buffer_size	/* Initial buffer size (maximum) */

	);

/*

 * Type of the generic DER encoder.

 */

typedef asn_enc_rval_t (der_type_encoder_f)(

		struct asn_TYPE_descriptor_s *type_descriptor,

		void *struct_ptr,	/* Structure to be encoded */

		int tag_mode,		/* {-1,0,1}: IMPLICIT, no, EXPLICIT */

		ber_tlv_tag_t tag,

		asn_app_consume_bytes_f *consume_bytes_cb,	/* Callback */

		void *app_key		/* Arbitrary callback argument */

	);

/*******************************

 * INTERNALLY USEFUL FUNCTIONS *

 *******************************/

/*

 * Write out leading TL[v] sequence according to the type definition.

 */

ssize_t der_write_tags(

		struct asn_TYPE_descriptor_s *type_descriptor,

		size_t struct_length,

		int tag_mode,		/* {-1,0,1}: IMPLICIT, no, EXPLICIT */

		int last_tag_form,	/* {0,!0}: prim, constructed */

		ber_tlv_tag_t tag,

		asn_app_consume_bytes_f *consume_bytes_cb,

		void *app_key

	);

#ifdef __cplusplus

}

#endif

#endif	/* _DER_ENCODER_H_ */