mirror of https://gerrit.osmocom.org/asn1c
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/*-
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* Copyright (c) 2003 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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#include <NULL.h>
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#include <BOOLEAN.h> /* Implemented in terms of BOOLEAN type */
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/*
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* NULL basic type description.
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*/
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static ber_tlv_tag_t asn1_DEF_NULL_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (5 << 2))
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};
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asn1_TYPE_descriptor_t asn1_DEF_NULL = {
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"NULL",
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asn_generic_no_constraint,
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BOOLEAN_decode_ber, /* Implemented in terms of BOOLEAN */
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NULL_encode_der, /* Special handling of DER encoding */
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NULL_print,
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BOOLEAN_free,
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0, /* Use generic outmost tag fetcher */
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asn1_DEF_NULL_tags,
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sizeof(asn1_DEF_NULL_tags)/sizeof(asn1_DEF_NULL_tags[0]),
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1, /* Single UNIVERSAL tag may be implicitly overriden */
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0 /* Always in primitive form */
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};
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der_enc_rval_t
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NULL_encode_der(asn1_TYPE_descriptor_t *sd, void *ptr,
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int tag_mode, ber_tlv_tag_t tag,
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asn_app_consume_bytes_f *cb, void *app_key) {
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der_enc_rval_t erval;
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erval.encoded = der_write_tags(sd, 0, tag_mode, tag, cb, app_key);
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if(erval.encoded == -1) {
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erval.failed_type = sd;
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erval.structure_ptr = ptr;
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}
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return erval;
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}
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int
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NULL_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel,
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asn_app_consume_bytes_f *cb, void *app_key) {
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if(sptr) {
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return cb("<present>", 9, app_key);
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} else {
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return cb("<absent>", 8, app_key);
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}
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}
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