gen_free.c revision 178826 
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
36RCSID("$Id: gen_free.c 19539 2006-12-28 17:15:05Z lha $");
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
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
177void
178generate_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