mirror of https://gerrit.osmocom.org/asn1c
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*-
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* Copyright (c) 2003, 2004 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 _CONSTR_SET_H_
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#define _CONSTR_SET_H_
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#include <constr_TYPE.h>
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/*
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* Description of a single element of the SET type.
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*/
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typedef struct asn1_SET_element_s {
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int memb_offset; /* Offset of the element */
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int optional; /* Whether the element is optional */
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ber_tlv_tag_t tag; /* Outmost (most immediate) tag */
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int tag_mode; /* IMPLICIT/no/EXPLICIT tag at current level */
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asn1_TYPE_descriptor_t
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*type; /* Member type descriptor */
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char *name; /* ASN.1 identifier of the element */
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} asn1_SET_element_t;
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/*
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* Map between the outmost tag of the element and the corresponding
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* element's index.
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*/
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typedef struct asn1_SET_tag2member_s {
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ber_tlv_tag_t el_tag; /* Outmost tag of the member */
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int el_no; /* Index of the associated member, base 0 */
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} asn1_SET_tag2member_t;
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typedef struct asn1_SET_specifics_s {
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/*
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* Target structure description.
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*/
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int struct_size; /* Size of the target structure. */
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int ctx_offset; /* Offset of the ber_dec_ctx_t member */
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int pres_offset; /* Offset of _presence_map member */
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/*
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* Members of the SET structure.
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*/
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asn1_SET_element_t *elements;
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int elements_count;
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/*
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* Tags to members mapping table (sorted).
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*/
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asn1_SET_tag2member_t *tag2el;
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int tag2el_count;
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/*
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* Extensions-related stuff.
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*/
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int extensible; /* Whether SET is extensible */
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unsigned int *_mandatory_elements; /* Bitmask of mandatory ones */
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} asn1_SET_specifics_t;
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/*
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* A set specialized functions dealing with the SET type.
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*/
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asn_constr_check_f SET_constraint;
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ber_type_decoder_f SET_decode_ber;
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der_type_encoder_f SET_encode_der;
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asn_struct_print_f SET_print;
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asn_struct_free_f SET_free;
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/***********************
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* Some handy helpers. *
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***********************/
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/*
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* Figure out whether the SET member indicated by PR_x has already been decoded.
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* It is very simple bitfield test, despite its visual complexity.
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*/
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#define ASN_SET_ISPRESENT(set_ptr, PR_x) \
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ASN_SET_ISPRESENT2(&((set_ptr)->_presence_map))
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#define ASN_SET_ISPRESENT2(map_ptr, PR_x) \
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(((unsigned int *)(map_ptr)) \
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[(PR_x) / (8 * sizeof(unsigned int))] \
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& (1 << ((8 * sizeof(unsigned int)) - 1 \
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- ((PR_x) % (8 * sizeof(unsigned int))))))
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#define ASN_SET_MKPRESENT(map_ptr, PR_x) \
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(((unsigned int *)(map_ptr)) \
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[(PR_x) / (8 * sizeof(unsigned int))] \
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|= (1 << ((8 * sizeof(unsigned int)) - 1 \
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- ((PR_x) % (8 * sizeof(unsigned int))))))
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#endif /* _CONSTR_SET_H_ */
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