48 lines
1.3 KiB
C
48 lines
1.3 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_SUPPORT_H
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#define OER_SUPPORT_H
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#include <asn_system.h> /* Platform-specific types */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Pre-computed OER constraints.
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*/
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typedef struct asn_oer_constraint_number_s {
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unsigned width; /* ±8,4,2,1 fixed bytes */
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unsigned positive; /* 1 for unsigned number, 0 for signed */
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} asn_oer_constraint_number_t;
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typedef struct asn_oer_constraints_s {
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asn_oer_constraint_number_t value;
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ssize_t size; /* -1 (no constraint) or >= 0 */
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} asn_oer_constraints_t;
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/*
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* Fetch the length determinant (X.696 (08/2015), #8.6) into *len_r.
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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_fetch_length(const void *bufptr, size_t size, size_t *len_r);
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/*
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* Serialize OER length. Returns the number of bytes serialized
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* or -1 if a given callback returned with negative result.
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*/
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ssize_t oer_serialize_length(size_t length, asn_app_consume_bytes_f *cb, void *app_key);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OER_SUPPORT_H */
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