1 /*
2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "gen_locl.h"
35
36 RCSID("$Id$");
37
38 static void
free_primitive(const char * typename,const char * name)39 free_primitive (const char *typename, const char *name)
40 {
41 fprintf (codefile, "der_free_%s(%s);\n", typename, name);
42 }
43
44 static void
free_type(const char * name,const Type * t,int preserve)45 free_type (const char *name, const Type *t, int preserve)
46 {
47 switch (t->type) {
48 case TType:
49 #if 0
50 free_type (name, t->symbol->type, preserve);
51 #endif
52 fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
53 break;
54 case TInteger:
55 if (t->range == NULL && t->members == NULL) {
56 free_primitive ("heim_integer", name);
57 break;
58 }
59 case TBoolean:
60 case TEnumerated :
61 case TNull:
62 case TGeneralizedTime:
63 case TUTCTime:
64 break;
65 case TBitString:
66 if (ASN1_TAILQ_EMPTY(t->members))
67 free_primitive("bit_string", name);
68 break;
69 case TOctetString:
70 free_primitive ("octet_string", name);
71 break;
72 case TChoice:
73 case TSet:
74 case TSequence: {
75 Member *m, *have_ellipsis = NULL;
76
77 if (t->members == NULL)
78 break;
79
80 if ((t->type == TSequence || t->type == TChoice) && preserve)
81 fprintf(codefile, "der_free_octet_string(&data->_save);\n");
82
83 if(t->type == TChoice)
84 fprintf(codefile, "switch((%s)->element) {\n", name);
85
86 ASN1_TAILQ_FOREACH(m, t->members, members) {
87 char *s;
88
89 if (m->ellipsis){
90 have_ellipsis = m;
91 continue;
92 }
93
94 if(t->type == TChoice)
95 fprintf(codefile, "case %s:\n", m->label);
96 if (asprintf (&s, "%s(%s)->%s%s",
97 m->optional ? "" : "&", name,
98 t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
99 errx(1, "malloc");
100 if(m->optional)
101 fprintf(codefile, "if(%s) {\n", s);
102 free_type (s, m->type, FALSE);
103 if(m->optional)
104 fprintf(codefile,
105 "free(%s);\n"
106 "%s = NULL;\n"
107 "}\n",s, s);
108 free (s);
109 if(t->type == TChoice)
110 fprintf(codefile, "break;\n");
111 }
112
113 if(t->type == TChoice) {
114 if (have_ellipsis)
115 fprintf(codefile,
116 "case %s:\n"
117 "der_free_octet_string(&(%s)->u.%s);\n"
118 "break;",
119 have_ellipsis->label,
120 name, have_ellipsis->gen_name);
121 fprintf(codefile, "}\n");
122 }
123 break;
124 }
125 case TSetOf:
126 case TSequenceOf: {
127 char *n;
128
129 fprintf (codefile, "while((%s)->len){\n", name);
130 if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
131 errx(1, "malloc");
132 free_type(n, t->subtype, FALSE);
133 fprintf(codefile,
134 "(%s)->len--;\n"
135 "}\n",
136 name);
137 fprintf(codefile,
138 "free((%s)->val);\n"
139 "(%s)->val = NULL;\n", name, name);
140 free(n);
141 break;
142 }
143 case TGeneralString:
144 free_primitive ("general_string", name);
145 break;
146 case TTeletexString:
147 free_primitive ("general_string", name);
148 break;
149 case TUTF8String:
150 free_primitive ("utf8string", name);
151 break;
152 case TPrintableString:
153 free_primitive ("printable_string", name);
154 break;
155 case TIA5String:
156 free_primitive ("ia5_string", name);
157 break;
158 case TBMPString:
159 free_primitive ("bmp_string", name);
160 break;
161 case TUniversalString:
162 free_primitive ("universal_string", name);
163 break;
164 case TVisibleString:
165 free_primitive ("visible_string", name);
166 break;
167 case TTag:
168 free_type (name, t->subtype, preserve);
169 break;
170 case TOID :
171 free_primitive ("oid", name);
172 break;
173 default :
174 abort ();
175 }
176 }
177
178 void
generate_type_free(const Symbol * s)179 generate_type_free (const Symbol *s)
180 {
181 int preserve = preserve_type(s->name) ? TRUE : FALSE;
182
183 fprintf (codefile, "void ASN1CALL\n"
184 "free_%s(%s *data)\n"
185 "{\n",
186 s->gen_name, s->gen_name);
187
188 free_type ("data", s->type, preserve);
189 fprintf (codefile, "}\n\n");
190 }
191
192