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
|
#include "asn1fix_internal.h"
#define ADD_TAG(skip, newtag) do { \
void *__p; \
if(skip && !(flags & AFT_FULL_COLLECT)) { \
if(newtag.tag_mode != TM_IMPLICIT) \
skip--; \
break; \
} else { \
if(newtag.tag_mode == TM_IMPLICIT) \
skip++; \
} \
__p = realloc((*tags), \
sizeof(struct asn1p_type_tag_s) * (count + 1)); \
if(!__p) return -1; \
*tags = __p; \
(*tags)[count++] = newtag; \
if((flags & AFT_FETCH_OUTMOST)) return count; \
} while(0)
/* X.691, #22.2 */
static int asn1f_fetch_minimal_choice_root_tag(arg_t *arg, struct asn1p_type_tag_s *tag, enum asn1f_aft_flags_e flags);
static int
asn1f_fetch_tags_impl(arg_t *arg, struct asn1p_type_tag_s **tags, int count, int skip, enum asn1f_aft_flags_e flags) {
asn1p_expr_t *expr = arg->expr;
DEBUG("Fetching tag from %s: meta %d, type %s", expr->Identifier,
expr->meta_type, expr->expr_type);
/* If this type is tagged, add this tag first */
if(expr->tag.tag_class != TC_NOCLASS)
ADD_TAG(skip, expr->tag);
/* REMOVE ME */
if(expr->expr_type == A1TC_EXTENSIBLE) {
struct asn1p_type_tag_s tt;
memset(&tt, 0, sizeof(tt));
tt.tag_class = -1;
ADD_TAG(skip, tt);
return count;
}
if(expr->meta_type == AMT_TYPE) {
struct asn1p_type_tag_s tt;
memset(&tt, 0, sizeof(tt));
tt.tag_class = TC_UNIVERSAL;
tt.tag_value = expr_type2uclass_value[expr->expr_type];
if(tt.tag_value == 0) {
if(expr->expr_type == ASN_TYPE_ANY
&& (flags & AFT_IMAGINARY_ANY))
tt.tag_value = -1;
else if(expr->expr_type != ASN_CONSTR_CHOICE)
return -1;
else if(count) return count;
else if((flags & AFT_CANON_CHOICE) == 0)
return -1;
else if(asn1f_fetch_minimal_choice_root_tag(arg,
&tt, flags))
return -1;
}
ADD_TAG(skip, tt);
return count;
}
if(expr->meta_type == AMT_TYPEREF) {
asn1p_expr_t *nexpr;
DEBUG("Following the reference %s", expr->Identifier);
nexpr = asn1f_lookup_symbol(arg, expr->module, expr->rhs_pspecs, expr->reference);
if(nexpr == NULL) {
if(errno != EEXIST) /* -fknown-extern-type */
return -1;
if(!count)
return 0; /* OK */
if((*tags)[count-1].tag_mode == TM_IMPLICIT) {
WARNING("Tagging mode for %s "
"is IMPLICIT, assuming %s "
"has exactly one tag",
expr->Identifier,
asn1f_printable_reference(expr->reference)
);
return count;
}
FATAL("Tagging mode %s -> %s "
"dangerously incompatible",
expr->Identifier,
asn1f_printable_reference(expr->reference)
);
return -1;
} else {
arg->expr = nexpr;
}
if(expr->_mark & TM_RECURSION)
return -1;
expr->_mark |= TM_RECURSION;
count = asn1f_fetch_tags_impl(arg, tags, count, skip, flags);
expr->_mark &= ~TM_RECURSION;
return count;
}
DEBUG("No tags discovered for type %d", expr->expr_type);
return -1;
}
static int
asn1f_fetch_minimal_choice_root_tag(arg_t *arg, struct asn1p_type_tag_s *tag, enum asn1f_aft_flags_e flags) {
struct asn1p_type_tag_s min_tag;
asn1p_expr_t *v;
memset(&min_tag, 0, sizeof(min_tag));
min_tag.tag_class = TC_PRIVATE + 1;
TQ_FOR(v, &(arg->expr->members), next) {
arg_t tmparg = *arg;
struct asn1p_type_tag_s *tags = 0;
int count;
if(v->expr_type == A1TC_EXTENSIBLE)
break; /* Search only within extension root */
tmparg.expr = v;
count = asn1f_fetch_tags_impl(&tmparg, &tags, 0, 0, flags);
if(count <= 0) continue;
if(tags[0].tag_class < min_tag.tag_class)
min_tag = tags[0];
else if(tags[0].tag_class == min_tag.tag_class
&& tags[0].tag_value < min_tag.tag_value)
min_tag = tags[0];
free(tags);
}
if(min_tag.tag_class == TC_PRIVATE + 1)
return -1;
else
*tag = min_tag;
return 0;
}
int
asn1f_fetch_outmost_tag(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s *tag, enum asn1f_aft_flags_e flags) {
struct asn1p_type_tag_s *tags;
int count;
flags |= AFT_FETCH_OUTMOST;
count = asn1f_fetch_tags(asn, mod, expr, &tags, flags);
if(count <= 0) return count;
*tag = tags[0];
free(tags);
return 0;
}
int
asn1f_fetch_tags(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s **tags_r, enum asn1f_aft_flags_e flags) {
arg_t arg;
struct asn1p_type_tag_s *tags = 0;
int count;
memset(&arg, 0, sizeof(arg));
arg.asn = asn;
arg.mod = mod;
arg.expr = expr;
count = asn1f_fetch_tags_impl(&arg, &tags, 0, 0, flags);
if(count <= 0 && tags) {
free(tags);
tags = 0;
}
*tags_r = tags;
return count;
}
|
