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/*-
* Copyright (c) 2003 Lev Walkin <vlm@lionet.info>. All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
#include <NULL.h>
#include <BOOLEAN.h> /* Implemented in terms of BOOLEAN type */
/*
* NULL basic type description.
*/
static ber_tlv_tag_t asn1_DEF_NULL_tags[] = {
(ASN_TAG_CLASS_UNIVERSAL | (5 << 2))
};
asn1_TYPE_descriptor_t asn1_DEF_NULL = {
"NULL",
asn_generic_no_constraint,
BOOLEAN_decode_ber, /* Implemented in terms of BOOLEAN */
NULL_encode_der, /* Special handling of DER encoding */
NULL_print,
BOOLEAN_free,
0, /* Use generic outmost tag fetcher */
asn1_DEF_NULL_tags,
sizeof(asn1_DEF_NULL_tags)/sizeof(asn1_DEF_NULL_tags[0]),
1, /* Single UNIVERSAL tag may be implicitly overriden */
0 /* Always in primitive form */
};
der_enc_rval_t
NULL_encode_der(asn1_TYPE_descriptor_t *sd, void *ptr,
int tag_mode, ber_tlv_tag_t tag,
asn_app_consume_bytes_f *cb, void *app_key) {
der_enc_rval_t erval;
erval.encoded = der_write_tags(sd, 0, tag_mode, tag, cb, app_key);
if(erval.encoded == -1) {
erval.failed_type = sd;
erval.structure_ptr = ptr;
}
return erval;
}
int
NULL_print(asn1_TYPE_descriptor_t *td, const void *sptr, int ilevel,
asn_app_consume_bytes_f *cb, void *app_key) {
if(sptr) {
return cb("<present>", 9, app_key);
} else {
return cb("<absent>", 8, app_key);
}
}
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