summaryrefslogtreecommitdiffstats
path: root/src/constr_SEQUENCE_OF.c
blob: aa101176d649ee2b26e3616e88197d9488991bb2 (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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
/*-
 * Copyright (c) 2003, 2004, 2006 Lev Walkin <vlm@lionet.info>.
 * All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <constr_SEQUENCE_OF.h>
#include <asn_SEQUENCE_OF.h>

/*
 * The DER encoder of the SEQUENCE OF type.
 */
asn_enc_rval_t
SEQUENCE_OF_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_TYPE_member_t *elm = td->elements;
	asn_anonymous_sequence_ *list = _A_SEQUENCE_FROM_VOID(ptr);
	size_t computed_size = 0;
	ssize_t encoding_size = 0;
	asn_enc_rval_t erval;
	int edx;

	ASN_DEBUG("Estimating size of SEQUENCE OF %s", td->name);

	/*
	 * Gather the length of the underlying members sequence.
	 */
	for(edx = 0; edx < list->count; edx++) {
		void *memb_ptr = list->array[edx];
		if(!memb_ptr) continue;
		erval = elm->type->der_encoder(elm->type, memb_ptr,
			0, elm->tag,
			0, 0);
		if(erval.encoded == -1)
			return erval;
		computed_size += erval.encoded;
	}

	/*
	 * Encode the TLV for the sequence itself.
	 */
	encoding_size = der_write_tags(td, computed_size, tag_mode, 1, tag,
		cb, app_key);
	if(encoding_size == -1) {
		erval.encoded = -1;
		erval.failed_type = td;
		erval.structure_ptr = ptr;
		return erval;
	}

	computed_size += encoding_size;
	if(!cb) {
		erval.encoded = computed_size;
		_ASN_ENCODED_OK(erval);
	}

	ASN_DEBUG("Encoding members of SEQUENCE OF %s", td->name);

	/*
	 * Encode all members.
	 */
	for(edx = 0; edx < list->count; edx++) {
		void *memb_ptr = list->array[edx];
		if(!memb_ptr) continue;
		erval = elm->type->der_encoder(elm->type, memb_ptr,
			0, elm->tag,
			cb, app_key);
		if(erval.encoded == -1)
			return erval;
		encoding_size += erval.encoded;
	}

	if(computed_size != (size_t)encoding_size) {
		/*
		 * Encoded size is not equal to the computed size.
		 */
		erval.encoded = -1;
		erval.failed_type = td;
		erval.structure_ptr = ptr;
	} else {
		erval.encoded = computed_size;
		erval.structure_ptr = 0;
		erval.failed_type = 0;
	}

	return erval;
}

asn_enc_rval_t
SEQUENCE_OF_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;
        asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
	asn_TYPE_member_t *elm = td->elements;
	asn_anonymous_sequence_ *list = _A_SEQUENCE_FROM_VOID(sptr);
	const char *mname = specs->as_XMLValueList
		? 0 : ((*elm->name) ? elm->name : elm->type->xml_tag);
	unsigned int mlen = mname ? strlen(mname) : 0;
	int xcan = (flags & XER_F_CANONICAL);
	int i;

	if(!sptr) _ASN_ENCODE_FAILED;

	er.encoded = 0;

	for(i = 0; i < list->count; i++) {
		asn_enc_rval_t tmper;
		void *memb_ptr = list->array[i];
		if(!memb_ptr) continue;

		if(mname) {
			if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel);
			_ASN_CALLBACK3("<", 1, mname, mlen, ">", 1);
		}

		tmper = elm->type->xer_encoder(elm->type, memb_ptr,
				ilevel + 1, flags, cb, app_key);
		if(tmper.encoded == -1) return tmper;
                if(tmper.encoded == 0 && specs->as_XMLValueList) {
                        const char *name = elm->type->xml_tag;
			size_t len = strlen(name);
			if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel + 1);
			_ASN_CALLBACK3("<", 1, name, len, "/>", 2);
                }

		if(mname) {
			_ASN_CALLBACK3("</", 2, mname, mlen, ">", 1);
			er.encoded += 5;
		}

		er.encoded += (2 * mlen) + tmper.encoded;
	}

	if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1);

	_ASN_ENCODED_OK(er);
cb_failed:
	_ASN_ENCODE_FAILED;
}

asn_enc_rval_t
SEQUENCE_OF_encode_uper(asn_TYPE_descriptor_t *td,
	asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) {
	asn_anonymous_sequence_ *list;
	asn_per_constraint_t *ct;
	asn_enc_rval_t er;
	asn_TYPE_member_t *elm = td->elements;
	int seq;

	if(!sptr) _ASN_ENCODE_FAILED;
	list = _A_SEQUENCE_FROM_VOID(sptr);

	er.encoded = 0;

	ASN_DEBUG("Encoding %s as SEQUENCE OF (%d)", td->name, list->count);

	if(constraints) ct = &constraints->size;
	else if(td->per_constraints) ct = &td->per_constraints->size;
	else ct = 0;

	/* If extensible constraint, check if size is in root */
	if(ct) {
		int not_in_root = (list->count < ct->lower_bound
				|| list->count > ct->upper_bound);
		ASN_DEBUG("lb %ld ub %ld %s",
			ct->lower_bound, ct->upper_bound,
			ct->flags & APC_EXTENSIBLE ? "ext" : "fix");
		if(ct->flags & APC_EXTENSIBLE) {
			/* Declare whether size is in extension root */
			if(per_put_few_bits(po, not_in_root, 1))
				_ASN_ENCODE_FAILED;
			if(not_in_root) ct = 0;
		} else if(not_in_root && ct->effective_bits >= 0)
			_ASN_ENCODE_FAILED;
	}

	if(ct && ct->effective_bits >= 0) {
		/* X.691, #19.5: No length determinant */
		if(per_put_few_bits(po, list->count - ct->lower_bound,
				ct->effective_bits))
			_ASN_ENCODE_FAILED;
	}

	for(seq = -1; seq < list->count;) {
		ssize_t mayEncode;
		if(seq < 0) seq = 0;
		if(ct && ct->effective_bits >= 0) {
			mayEncode = list->count;
		} else {
			mayEncode = uper_put_length(po, list->count - seq);
			if(mayEncode < 0) _ASN_ENCODE_FAILED;
		}

		while(mayEncode--) {
			void *memb_ptr = list->array[seq++];
			if(!memb_ptr) _ASN_ENCODE_FAILED;
			er = elm->type->uper_encoder(elm->type,
				elm->per_constraints, memb_ptr, po);
			if(er.encoded == -1)
				_ASN_ENCODE_FAILED;
		}
	}

	_ASN_ENCODED_OK(er);
}