1 /* $NetBSD: gen_free.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "gen_locl.h"
37
38 __RCSID("NetBSD");
39
40 static void
free_primitive(const char * typename,const char * name)41 free_primitive (const char *typename, const char *name)
42 {
43 fprintf (codefile, "der_free_%s(%s);\n", typename, name);
44 }
45
46 static void
free_type(const char * name,const Type * t,int preserve)47 free_type (const char *name, const Type *t, int preserve)
48 {
49 switch (t->type) {
50 case TType:
51 #if 0
52 free_type (name, t->symbol->type, preserve);
53 #endif
54 fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
55 break;
56 case TInteger:
57 if (t->range == NULL && t->members == NULL) {
58 free_primitive ("heim_integer", name);
59 break;
60 }
61 case TBoolean:
62 case TEnumerated :
63 case TNull:
64 case TGeneralizedTime:
65 case TUTCTime:
66 break;
67 case TBitString:
68 if (ASN1_TAILQ_EMPTY(t->members))
69 free_primitive("bit_string", name);
70 break;
71 case TOctetString:
72 free_primitive ("octet_string", name);
73 break;
74 case TChoice:
75 case TSet:
76 case TSequence: {
77 Member *m, *have_ellipsis = NULL;
78
79 if (t->members == NULL)
80 break;
81
82 if ((t->type == TSequence || t->type == TChoice) && preserve)
83 fprintf(codefile, "der_free_octet_string(&data->_save);\n");
84
85 if(t->type == TChoice)
86 fprintf(codefile, "switch((%s)->element) {\n", name);
87
88 ASN1_TAILQ_FOREACH(m, t->members, members) {
89 char *s;
90
91 if (m->ellipsis){
92 have_ellipsis = m;
93 continue;
94 }
95
96 if(t->type == TChoice)
97 fprintf(codefile, "case %s:\n", m->label);
98 if (asprintf (&s, "%s(%s)->%s%s",
99 m->optional ? "" : "&", name,
100 t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
101 errx(1, "malloc");
102 if(m->optional)
103 fprintf(codefile, "if(%s) {\n", s);
104 free_type (s, m->type, FALSE);
105 if(m->optional)
106 fprintf(codefile,
107 "free(%s);\n"
108 "%s = NULL;\n"
109 "}\n",s, s);
110 free (s);
111 if(t->type == TChoice)
112 fprintf(codefile, "break;\n");
113 }
114
115 if(t->type == TChoice) {
116 if (have_ellipsis)
117 fprintf(codefile,
118 "case %s:\n"
119 "der_free_octet_string(&(%s)->u.%s);\n"
120 "break;",
121 have_ellipsis->label,
122 name, have_ellipsis->gen_name);
123 fprintf(codefile, "}\n");
124 }
125 break;
126 }
127 case TSetOf:
128 case TSequenceOf: {
129 char *n;
130
131 fprintf (codefile, "while((%s)->len){\n", name);
132 if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
133 errx(1, "malloc");
134 free_type(n, t->subtype, FALSE);
135 fprintf(codefile,
136 "(%s)->len--;\n"
137 "}\n",
138 name);
139 fprintf(codefile,
140 "free((%s)->val);\n"
141 "(%s)->val = NULL;\n", name, name);
142 free(n);
143 break;
144 }
145 case TGeneralString:
146 free_primitive ("general_string", name);
147 break;
148 case TTeletexString:
149 free_primitive ("general_string", name);
150 break;
151 case TUTF8String:
152 free_primitive ("utf8string", name);
153 break;
154 case TPrintableString:
155 free_primitive ("printable_string", name);
156 break;
157 case TIA5String:
158 free_primitive ("ia5_string", name);
159 break;
160 case TBMPString:
161 free_primitive ("bmp_string", name);
162 break;
163 case TUniversalString:
164 free_primitive ("universal_string", name);
165 break;
166 case TVisibleString:
167 free_primitive ("visible_string", name);
168 break;
169 case TTag:
170 free_type (name, t->subtype, preserve);
171 break;
172 case TOID :
173 free_primitive ("oid", name);
174 break;
175 default :
176 abort ();
177 }
178 }
179
180 void
generate_type_free(const Symbol * s)181 generate_type_free (const Symbol *s)
182 {
183 int preserve = preserve_type(s->name) ? TRUE : FALSE;
184
185 fprintf (codefile, "void ASN1CALL\n"
186 "free_%s(%s *data)\n"
187 "{\n",
188 s->gen_name, s->gen_name);
189
190 free_type ("data", s->type, preserve);
191 fprintf (codefile, "}\n\n");
192 }
193
194