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

   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  * 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("$Heimdal: gen_glue.c 15617 2005-07-12 06:27:42Z lha $"
  37         "$NetBSD$");
  38
  39 static void
  40 generate_2int (const Type *t, const char *gen_name)
  41 {
  42     Member *m;
  43
  44     fprintf (headerfile,
  45              "unsigned %s2int(%s);\n",
  46              gen_name, gen_name);
  47
  48     fprintf (codefile,
  49              "unsigned %s2int(%s f)\n"
  50              "{\n"
  51              "unsigned r = 0;\n",
  52              gen_name, gen_name);
  53
  54     ASN1_TAILQ_FOREACH(m, t->members, members) {
  55         fprintf (codefile, "if(f.%s) r |= (1U << %d);\n",
  56                  m->gen_name, m->val);
  57     }
  58     fprintf (codefile, "return r;\n"
  59              "}\n\n");
  60 }
  61
  62 static void
  63 generate_int2 (const Type *t, const char *gen_name)
  64 {
  65     Member *m;
  66
  67     fprintf (headerfile,
  68              "%s int2%s(unsigned);\n",
  69              gen_name, gen_name);
  70
  71     fprintf (codefile,
  72              "%s int2%s(unsigned n)\n"
  73              "{\n"
  74              "\t%s flags;\n\n",
  75              gen_name, gen_name, gen_name);
  76
  77     if(t->members) {
  78         ASN1_TAILQ_FOREACH(m, t->members, members) {
  79             fprintf (codefile, "\tflags.%s = (n >> %d) & 1;\n",
  80                      m->gen_name, m->val);
  81         }
  82     }
  83     fprintf (codefile, "\treturn flags;\n"
  84              "}\n\n");
  85 }
  86
  87 /*
  88  * This depends on the bit string being declared in increasing order
  89  */
  90
  91 static void
  92 generate_units (const Type *t, const char *gen_name)
  93 {
  94     Member *m;
  95
  96     fprintf (headerfile,
  97              "const struct units * asn1_%s_units(void);",
  98              gen_name);
  99
 100     fprintf (codefile,
 101              "static struct units %s_units[] = {\n",
 102              gen_name);
 103
 104     if(t->members) {
 105         ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
 106             fprintf (codefile,
 107                      "\t{\"%s\",\t1U << %d},\n", m->gen_name, m->val);
 108         }
 109     }
 110
 111     fprintf (codefile,
 112              "\t{NULL,\t0}\n"
 113              "};\n\n");
 114
 115     fprintf (codefile,
 116              "const struct units * asn1_%s_units(void){\n"
 117              "return %s_units;\n"
 118              "}\n\n",
 119              gen_name, gen_name);
 120
 121
 122 }
 123
 124 void
 125 generate_glue (const Type *t, const char *gen_name)
 126 {
 127     switch(t->type) {
 128     case TTag:
 129         generate_glue(t->subtype, gen_name);
 130         break;
 131     case TBitString :
 132         if (!ASN1_TAILQ_EMPTY(t->members)) {
 133             generate_2int (t, gen_name);
 134             generate_int2 (t, gen_name);
 135             generate_units (t, gen_name);
 136         }
 137         break;
 138     default :
 139         break;
 140     }
 141 }