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
36RCSID("$Id$");
37
38static void
39free_primitive (const char *typename, const char *name)
40{
41    fprintf (codefile, "der_free_%s(%s);\n", typename, name);
42}
43
44static void
45free_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	    fprintf(codefile,
86		    "case ASN1_CHOICE_INVALID: break;\n");
87	}
88
89	ASN1_TAILQ_FOREACH(m, t->members, members) {
90	    char *s;
91
92	    if (m->ellipsis){
93		have_ellipsis = m;
94		continue;
95	    }
96
97	    if(t->type == TChoice)
98		fprintf(codefile, "case %s:\n", m->label);
99	    if (asprintf (&s, "%s(%s)->%s%s",
100			  m->optional ? "" : "&", name,
101			  t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
102		errx(1, "malloc");
103	    if(m->optional)
104		fprintf(codefile, "if(%s) {\n", s);
105	    free_type (s, m->type, FALSE);
106	    if(m->optional)
107		fprintf(codefile,
108			"free(%s);\n"
109			"%s = NULL;\n"
110			"}\n",s, s);
111	    free (s);
112	    if(t->type == TChoice)
113		fprintf(codefile, "break;\n");
114	}
115
116	if(t->type == TChoice) {
117	    if (have_ellipsis)
118		fprintf(codefile,
119			"case %s:\n"
120			"der_free_octet_string(&(%s)->u.%s);\n"
121			"break;",
122			have_ellipsis->label,
123			name, have_ellipsis->gen_name);
124	    fprintf(codefile, "}\n");
125	}
126	break;
127    }
128    case TSetOf:
129    case TSequenceOf: {
130	char *n;
131
132	fprintf (codefile, "while((%s)->len){\n", name);
133	if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
134	    errx(1, "malloc");
135	free_type(n, t->subtype, FALSE);
136	fprintf(codefile,
137		"(%s)->len--;\n"
138		"}\n",
139		name);
140	fprintf(codefile,
141		"free((%s)->val);\n"
142		"(%s)->val = NULL;\n", name, name);
143	free(n);
144	break;
145    }
146    case TGeneralString:
147	free_primitive ("general_string", name);
148	break;
149    case TTeletexString:
150	free_primitive ("general_string", name);
151	break;
152    case TUTF8String:
153	free_primitive ("utf8string", name);
154	break;
155    case TPrintableString:
156	free_primitive ("printable_string", name);
157	break;
158    case TIA5String:
159	free_primitive ("ia5_string", name);
160	break;
161    case TBMPString:
162	free_primitive ("bmp_string", name);
163	break;
164    case TUniversalString:
165	free_primitive ("universal_string", name);
166	break;
167    case TVisibleString:
168	free_primitive ("visible_string", name);
169	break;
170    case TTag:
171	free_type (name, t->subtype, preserve);
172	break;
173    case TOID :
174	free_primitive ("oid", name);
175	break;
176    default :
177	abort ();
178    }
179}
180
181void
182generate_type_free (const Symbol *s)
183{
184    int preserve = preserve_type(s->name) ? TRUE : FALSE;
185
186    fprintf (codefile, "void ASN1CALL\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