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/*
* Copyright (c) 2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
#ifndef OER_DECODER_H
#define OER_DECODER_H
#include <asn_application.h>
#include <oer_support.h>
#ifdef __cplusplus
extern "C" {
#endif
struct asn_TYPE_descriptor_s; /* Forward declaration */
struct asn_codec_ctx_s; /* Forward declaration */
/*
* The Octet Encoding Rules (OER, X.696 08/2015) decoder for any given type.
* This function may be invoked directly by the application.
* Parses CANONICAL-OER and BASIC-OER.
*/
asn_dec_rval_t oer_decode(const struct asn_codec_ctx_s *opt_codec_ctx,
const struct asn_TYPE_descriptor_s *type_descriptor,
void **struct_ptr, /* Pointer to a target structure's pointer */
const void *buffer, /* Data to be decoded */
size_t size /* Size of that buffer */
);
/*
* Type of generic function which decodes the byte stream into the structure.
*/
typedef asn_dec_rval_t(oer_type_decoder_f)(
const struct asn_codec_ctx_s *opt_codec_ctx,
const struct asn_TYPE_descriptor_s *type_descriptor,
const asn_oer_constraints_t *constraints,
void **struct_ptr,
const void *buf_ptr,
size_t size);
/*
* Swallow the Open Type (X.696 (08/2015), #30) into /dev/null.
* RETURN VALUES:
* -1: Fatal error deciphering length.
* 0: More data expected than bufptr contains.
* >0: Number of bytes used from bufptr.
*/
ssize_t oer_open_type_skip(const void *bufptr, size_t size);
/*
* Read the Open Type (X.696 (08/2015), #30).
* RETURN VALUES:
* 0: More data expected than bufptr contains.
* -1: Fatal error deciphering length.
* >0: Number of bytes used from bufptr.
*/
ssize_t oer_open_type_get(const asn_codec_ctx_t *opt_codec_ctx,
const struct asn_TYPE_descriptor_s *td,
const asn_oer_constraints_t *constraints,
void **struct_ptr, const void *bufptr, size_t size);
/*
* Length-prefixed buffer decoding for primitive types.
*/
oer_type_decoder_f oer_decode_primitive;
#ifdef __cplusplus
}
#endif
#endif /* OER_DECODER_H */
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