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