/*-

 * Copyright (c) 2005, 2007 Lev Walkin <vlm@lionet.info>. All rights reserved.

 * Redistribution and modifications are permitted subject to BSD license.

 */

#ifndef	_PER_DECODER_H_

#define	_PER_DECODER_H_

#include <asn_application.h>

#include <per_support.h>

#ifdef __cplusplus

extern "C" {

#endif

struct asn_TYPE_descriptor_s;	/* Forward declaration */

/*

 * Unaligned PER decoder of a "complete encoding" as per X.691#10.1.

 * On success, this call always returns (.consumed >= 1), as per X.691#10.1.3.

 */

asn_dec_rval_t uper_decode_complete(struct asn_codec_ctx_s *opt_codec_ctx,

	struct asn_TYPE_descriptor_s *type_descriptor,	/* Type to decode */

	void **struct_ptr,	/* Pointer to a target structure's pointer */

	const void *buffer,	/* Data to be decoded */

	size_t size		/* Size of data buffer */

	);

/*

 * Unaligned PER decoder of any ASN.1 type. May be invoked by the application.

 * WARNING: This call returns the number of BITS read from the stream. Beware.

 */

asn_dec_rval_t uper_decode(struct asn_codec_ctx_s *opt_codec_ctx,

	struct asn_TYPE_descriptor_s *type_descriptor,	/* Type to decode */

	void **struct_ptr,	/* Pointer to a target structure's pointer */

	const void *buffer,	/* Data to be decoded */

	size_t size,		/* Size of data buffer */

	int skip_bits,		/* Number of unused leading bits, 0..7 */

	int unused_bits		/* Number of unused tailing bits, 0..7 */

	);

/*

 * Type of the type-specific PER decoder function.

 */

typedef asn_dec_rval_t (per_type_decoder_f)(asn_codec_ctx_t *opt_codec_ctx,

		struct asn_TYPE_descriptor_s *type_descriptor,

		asn_per_constraints_t *constraints,

		void **struct_ptr,

		asn_per_data_t *per_data

	);

#ifdef __cplusplus

}

#endif

#endif	/* _PER_DECODER_H_ */