xref: /freebsd/crypto/heimdal/lib/asn1/gen_free.c (revision 195ebc7e9e4b129de810833791a19dfb4349d6a9)
1 /*
2  * Copyright (c) 1997 - 2005 Kungliga Tekniska H�gskolan
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: gen_free.c 19539 2006-12-28 17:15:05Z lha $");
37 
38 static void
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
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 	    asprintf (&s, "%s(%s)->%s%s",
97 		      m->optional ? "" : "&", name,
98 		      t->type == TChoice ? "u." : "", m->gen_name);
99 	    if (s == NULL)
100 		errx(1, "malloc");
101 	    if(m->optional)
102 		fprintf(codefile, "if(%s) {\n", s);
103 	    free_type (s, m->type, FALSE);
104 	    if(m->optional)
105 		fprintf(codefile,
106 			"free(%s);\n"
107 			"%s = NULL;\n"
108 			"}\n",s, s);
109 	    free (s);
110 	    if(t->type == TChoice)
111 		fprintf(codefile, "break;\n");
112 	}
113 
114 	if(t->type == TChoice) {
115 	    if (have_ellipsis)
116 		fprintf(codefile,
117 			"case %s:\n"
118 			"der_free_octet_string(&(%s)->u.%s);\n"
119 			"break;",
120 			have_ellipsis->label,
121 			name, have_ellipsis->gen_name);
122 	    fprintf(codefile, "}\n");
123 	}
124 	break;
125     }
126     case TSetOf:
127     case TSequenceOf: {
128 	char *n;
129 
130 	fprintf (codefile, "while((%s)->len){\n", name);
131 	asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name);
132 	if (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 TUTF8String:
149 	free_primitive ("utf8string", name);
150 	break;
151     case TPrintableString:
152 	free_primitive ("printable_string", name);
153 	break;
154     case TIA5String:
155 	free_primitive ("ia5_string", name);
156 	break;
157     case TBMPString:
158 	free_primitive ("bmp_string", name);
159 	break;
160     case TUniversalString:
161 	free_primitive ("universal_string", name);
162 	break;
163     case TVisibleString:
164 	free_primitive ("visible_string", name);
165 	break;
166     case TTag:
167 	free_type (name, t->subtype, preserve);
168 	break;
169     case TOID :
170 	free_primitive ("oid", name);
171 	break;
172     default :
173 	abort ();
174     }
175 }
176 
177 void
178 generate_type_free (const Symbol *s)
179 {
180   int preserve = preserve_type(s->name) ? TRUE : FALSE;
181 
182   fprintf (headerfile,
183 	   "void   free_%s  (%s *);\n",
184 	   s->gen_name, s->gen_name);
185 
186   fprintf (codefile, "void\n"
187 	   "free_%s(%s *data)\n"
188 	   "{\n",
189 	   s->gen_name, s->gen_name);
190 
191   free_type ("data", s->type, preserve);
192   fprintf (codefile, "}\n\n");
193 }
194 
195