aboutsummaryrefslogtreecommitdiffstats
path: root/skeletons/NULL.c
blob: 62bc91e05081c223d48d9713314ae95b79152715 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*-
 * Copyright (c) 2003, 2005 Lev Walkin <vlm@lionet.info>. All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <asn_codecs_prim.h>
#include <NULL.h>
#include <BOOLEAN.h>	/* Implemented in terms of BOOLEAN type */

/*
 * NULL basic type description.
 */
static const ber_tlv_tag_t asn_DEF_NULL_tags[] = {
	(ASN_TAG_CLASS_UNIVERSAL | (5 << 2))
};
asn_TYPE_descriptor_t asn_DEF_NULL = {
	"NULL",
	"NULL",
	BOOLEAN_free,
	NULL_print,
	asn_generic_no_constraint,
	BOOLEAN_decode_ber,	/* Implemented in terms of BOOLEAN */
	NULL_encode_der,	/* Special handling of DER encoding */
	NULL_decode_xer,
	NULL_encode_xer,
	NULL_decode_uper,	/* Unaligned PER decoder */
	NULL_encode_uper,	/* Unaligned PER encoder */
	0, /* Use generic outmost tag fetcher */
	asn_DEF_NULL_tags,
	sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]),
	asn_DEF_NULL_tags,	/* Same as above */
	sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]),
	0,	/* No PER visible constraints */
	0, 0,	/* No members */
	0	/* No specifics */
};

asn_enc_rval_t
NULL_encode_der(asn_TYPE_descriptor_t *td, void *ptr,
	int tag_mode, ber_tlv_tag_t tag,
	asn_app_consume_bytes_f *cb, void *app_key) {
	asn_enc_rval_t erval;

	erval.encoded = der_write_tags(td, 0, tag_mode, 0, tag, cb, app_key);
	if(erval.encoded == -1) {
		erval.failed_type = td;
		erval.structure_ptr = ptr;
	}

	ASN__ENCODED_OK(erval);
}

asn_enc_rval_t
NULL_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
	int ilevel, enum xer_encoder_flags_e flags,
		asn_app_consume_bytes_f *cb, void *app_key) {
	asn_enc_rval_t er;

	(void)td;
	(void)sptr;
	(void)ilevel;
	(void)flags;
	(void)cb;
	(void)app_key;

	/* XMLNullValue is empty */
	er.encoded = 0;
	ASN__ENCODED_OK(er);
}


static enum xer_pbd_rval
NULL__xer_body_decode(asn_TYPE_descriptor_t *td, void *sptr, const void *chunk_buf, size_t chunk_size) {
	(void)td;
	(void)sptr;
	(void)chunk_buf;    /* Going to be empty according to the rules below. */

	/*
	 * There must be no content in self-terminating <NULL/> tag.
	 */
	if(chunk_size)
		return XPBD_BROKEN_ENCODING;
	else
		return XPBD_BODY_CONSUMED;
}

asn_dec_rval_t
NULL_decode_xer(asn_codec_ctx_t *opt_codec_ctx,
	asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname,
		const void *buf_ptr, size_t size) {

	return xer_decode_primitive(opt_codec_ctx, td,
		sptr, sizeof(NULL_t), opt_mname, buf_ptr, size,
		NULL__xer_body_decode);
}

int
NULL_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
	asn_app_consume_bytes_f *cb, void *app_key) {

	(void)td;	/* Unused argument */
	(void)ilevel;	/* Unused argument */

	if(sptr) {
		return (cb("<present>", 9, app_key) < 0) ? -1 : 0;
	} else {
		return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
	}
}

asn_dec_rval_t
NULL_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
	asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
	asn_dec_rval_t rv;

	(void)opt_codec_ctx;
	(void)td;
	(void)constraints;
	(void)pd;

	if(!*sptr) {
		*sptr = MALLOC(sizeof(NULL_t));
		if(*sptr) {
			*(NULL_t *)*sptr = 0;
		} else {
			ASN__DECODE_FAILED;
		}
	}

	/*
	 * NULL type does not have content octets.
	 */

	rv.code = RC_OK;
	rv.consumed = 0;
	return rv;
}

asn_enc_rval_t
NULL_encode_uper(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints,
		void *sptr, asn_per_outp_t *po) {
	asn_enc_rval_t er;

	(void)td;
	(void)constraints;
	(void)sptr;
	(void)po;

	er.encoded = 0;
	ASN__ENCODED_OK(er);
}