crypto/external/bsd/heimdal/dist/lib/asn1/gen_glue.c

   1 /*      $NetBSD: gen_glue.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $  */
   2
   3 /*
   4  * Copyright (c) 1997, 1999, 2000, 2003 - 2005 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * 3. Neither the name of the Institute nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #include "gen_locl.h"
  39
  40 __RCSID("NetBSD");
  41
  42 static void
  43 generate_2int (const Type *t, const char *gen_name)
  44 {
  45     Member *m;
  46
  47     fprintf (headerfile,
  48              "unsigned %s2int(%s);\n",
  49              gen_name, gen_name);
  50
  51     fprintf (codefile,
  52              "unsigned %s2int(%s f)\n"
  53              "{\n"
  54              "unsigned r = 0;\n",
  55              gen_name, gen_name);
  56
  57     ASN1_TAILQ_FOREACH(m, t->members, members) {
  58         fprintf (codefile, "if(f.%s) r |= (1U << %d);\n",
  59                  m->gen_name, m->val);
  60     }
  61     fprintf (codefile, "return r;\n"
  62              "}\n\n");
  63 }
  64
  65 static void
  66 generate_int2 (const Type *t, const char *gen_name)
  67 {
  68     Member *m;
  69
  70     fprintf (headerfile,
  71              "%s int2%s(unsigned);\n",
  72              gen_name, gen_name);
  73
  74     fprintf (codefile,
  75              "%s int2%s(unsigned n)\n"
  76              "{\n"
  77              "\t%s flags;\n\n"
  78              "\tmemset(&flags, 0, sizeof(flags));\n\n",
  79              gen_name, gen_name, gen_name);
  80
  81     if(t->members) {
  82         ASN1_TAILQ_FOREACH(m, t->members, members) {
  83             fprintf (codefile, "\tflags.%s = (n >> %d) & 1;\n",
  84                      m->gen_name, m->val);
  85         }
  86     }
  87     fprintf (codefile, "\treturn flags;\n"
  88              "}\n\n");
  89 }
  90
  91 /*
  92  * This depends on the bit string being declared in increasing order
  93  */
  94
  95 static void
  96 generate_units (const Type *t, const char *gen_name)
  97 {
  98     Member *m;
  99
 100     if (template_flag) {
 101         fprintf (headerfile,
 102                  "extern const struct units *asn1_%s_table_units;\n",
 103                  gen_name);
 104         fprintf (headerfile, "#define asn1_%s_units() (asn1_%s_table_units)\n",
 105                  gen_name, gen_name);
 106     } else {
 107         fprintf (headerfile,
 108                  "const struct units * asn1_%s_units(void);\n",
 109                  gen_name);
 110     }
 111
 112     fprintf (codefile,
 113              "static struct units %s_units[] = {\n",
 114              gen_name);
 115
 116     if(t->members) {
 117         ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
 118             fprintf (codefile,
 119                      "\t{\"%s\",\t1U << %d},\n", m->name, m->val);
 120         }
 121     }
 122
 123     fprintf (codefile,
 124              "\t{NULL,\t0}\n"
 125              "};\n\n");
 126
 127     if (template_flag)
 128         fprintf (codefile,
 129                  "const struct units * asn1_%s_table_units = %s_units;\n",
 130                  gen_name, gen_name);
 131     else
 132         fprintf (codefile,
 133                  "const struct units * asn1_%s_units(void){\n"
 134                  "return %s_units;\n"
 135                  "}\n\n",
 136                  gen_name, gen_name);
 137
 138
 139 }
 140
 141 void
 142 generate_glue (const Type *t, const char *gen_name)
 143 {
 144     switch(t->type) {
 145     case TTag:
 146         generate_glue(t->subtype, gen_name);
 147         break;
 148     case TBitString :
 149         if (!ASN1_TAILQ_EMPTY(t->members)) {
 150             generate_2int (t, gen_name);
 151             generate_int2 (t, gen_name);
 152             generate_units (t, gen_name);
 153         }
 154         break;
 155     default :
 156         break;
 157     }
 158 }