1/*
2 * Copyright (c) 1997, 1999, 2000, 2003 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Portions Copyright (c) 2009 Apple Inc. 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
38RCSID("$Id$");
39
40static void
41generate_2int (const Type *t, const char *gen_name)
42{
43    Member *m;
44
45    fprintf (headerfile,
46	     "unsigned %s2int(%s);\n",
47	     gen_name, gen_name);
48
49    fprintf (codefile,
50	     "unsigned %s2int(%s f)\n"
51	     "{\n"
52	     "unsigned r = 0;\n",
53	     gen_name, gen_name);
54
55    ASN1_TAILQ_FOREACH(m, t->members, members) {
56	fprintf (codefile, "if(f.%s) r |= (1U << %d);\n",
57		 m->gen_name, m->val);
58    }
59    fprintf (codefile, "return r;\n"
60	     "}\n\n");
61}
62
63static void
64generate_int2 (const Type *t, const char *gen_name)
65{
66    Member *m;
67
68    fprintf (headerfile,
69	     "%s int2%s(unsigned);\n",
70	     gen_name, gen_name);
71
72    fprintf (codefile,
73	     "%s int2%s(unsigned n)\n"
74	     "{\n"
75	     "\t%s flags;\n\n"
76	     "\tmemset(&flags, 0, sizeof(flags));\n\n",
77	     gen_name, gen_name, gen_name);
78
79    if(t->members) {
80	ASN1_TAILQ_FOREACH(m, t->members, members) {
81	    fprintf (codefile, "\tflags.%s = (n >> %d) & 1;\n",
82		     m->gen_name, m->val);
83	}
84    }
85    fprintf (codefile, "\treturn flags;\n"
86	     "}\n\n");
87}
88
89/*
90 * This depends on the bit string being declared in increasing order
91 */
92
93static void
94generate_units (const Type *t, const char *gen_name)
95{
96    Member *m;
97
98    if (template_flag) {
99	fprintf (headerfile,
100		 "extern const struct units *asn1_%s_table_units;\n",
101		 gen_name);
102	fprintf (headerfile, "#define asn1_%s_units() (asn1_%s_table_units)\n",
103		 gen_name, gen_name);
104    } else {
105	fprintf (headerfile,
106		 "const struct units * asn1_%s_units(void);\n",
107		 gen_name);
108    }
109
110    fprintf (codefile,
111	     "static struct units %s_units[] = {\n",
112	     gen_name);
113
114    if(t->members) {
115	ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
116	    fprintf (codefile,
117		     "\t{\"%s\",\t1U << %d},\n", m->name, m->val);
118	}
119    }
120
121    fprintf (codefile,
122	     "\t{NULL,\t0}\n"
123	     "};\n\n");
124
125    if (template_flag)
126	fprintf (codefile,
127		 "const struct units * asn1_%s_table_units = %s_units;\n",
128		 gen_name, gen_name);
129    else
130	fprintf (codefile,
131		 "const struct units * asn1_%s_units(void){\n"
132		 "return %s_units;\n"
133		 "}\n\n",
134		 gen_name, gen_name);
135
136
137}
138
139void
140generate_glue (const Type *t, const char *gen_name)
141{
142    switch(t->type) {
143    case TTag:
144	generate_glue(t->subtype, gen_name);
145	break;
146    case TBitString :
147	if (!ASN1_TAILQ_EMPTY(t->members)) {
148	    generate_2int (t, gen_name);
149	    generate_int2 (t, gen_name);
150	    if (parse_units_flag)
151		generate_units (t, gen_name);
152	}
153	break;
154    default :
155	break;
156    }
157}
158