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

   1 /*      $NetBSD: gen_free.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $  */
   2
   3 /*
   4  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * 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
  38 __RCSID("NetBSD");
  39
  40 static void
  41 free_primitive (const char *typename, const char *name)
  42 {
  43     fprintf (codefile, "der_free_%s(%s);\n", typename, name);
  44 }
  45
  46 static void
  47 free_type (const char *name, const Type *t, int preserve)
  48 {
  49     switch (t->type) {
  50     case TType:
  51 #if 0
  52         free_type (name, t->symbol->type, preserve);
  53 #endif
  54         fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
  55         break;
  56     case TInteger:
  57         if (t->range == NULL && t->members == NULL) {
  58             free_primitive ("heim_integer", name);
  59             break;
  60         }
  61     case TBoolean:
  62     case TEnumerated :
  63     case TNull:
  64     case TGeneralizedTime:
  65     case TUTCTime:
  66         break;
  67     case TBitString:
  68         if (ASN1_TAILQ_EMPTY(t->members))
  69             free_primitive("bit_string", name);
  70         break;
  71     case TOctetString:
  72         free_primitive ("octet_string", name);
  73         break;
  74     case TChoice:
  75     case TSet:
  76     case TSequence: {
  77         Member *m, *have_ellipsis = NULL;
  78
  79         if (t->members == NULL)
  80             break;
  81
  82         if ((t->type == TSequence || t->type == TChoice) && preserve)
  83             fprintf(codefile, "der_free_octet_string(&data->_save);\n");
  84
  85         if(t->type == TChoice)
  86             fprintf(codefile, "switch((%s)->element) {\n", name);
  87
  88         ASN1_TAILQ_FOREACH(m, t->members, members) {
  89             char *s;
  90
  91             if (m->ellipsis){
  92                 have_ellipsis = m;
  93                 continue;
  94             }
  95
  96             if(t->type == TChoice)
  97                 fprintf(codefile, "case %s:\n", m->label);
  98             if (asprintf (&s, "%s(%s)->%s%s",
  99                           m->optional ? "" : "&", name,
 100                           t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
 101                 errx(1, "malloc");
 102             if(m->optional)
 103                 fprintf(codefile, "if(%s) {\n", s);
 104             free_type (s, m->type, FALSE);
 105             if(m->optional)
 106                 fprintf(codefile,
 107                         "free(%s);\n"
 108                         "%s = NULL;\n"
 109                         "}\n",s, s);
 110             free (s);
 111             if(t->type == TChoice)
 112                 fprintf(codefile, "break;\n");
 113         }
 114
 115         if(t->type == TChoice) {
 116             if (have_ellipsis)
 117                 fprintf(codefile,
 118                         "case %s:\n"
 119                         "der_free_octet_string(&(%s)->u.%s);\n"
 120                         "break;",
 121                         have_ellipsis->label,
 122                         name, have_ellipsis->gen_name);
 123             fprintf(codefile, "}\n");
 124         }
 125         break;
 126     }
 127     case TSetOf:
 128     case TSequenceOf: {
 129         char *n;
 130
 131         fprintf (codefile, "while((%s)->len){\n", name);
 132         if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || 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 TTeletexString:
 149         free_primitive ("general_string", name);
 150         break;
 151     case TUTF8String:
 152         free_primitive ("utf8string", name);
 153         break;
 154     case TPrintableString:
 155         free_primitive ("printable_string", name);
 156         break;
 157     case TIA5String:
 158         free_primitive ("ia5_string", name);
 159         break;
 160     case TBMPString:
 161         free_primitive ("bmp_string", name);
 162         break;
 163     case TUniversalString:
 164         free_primitive ("universal_string", name);
 165         break;
 166     case TVisibleString:
 167         free_primitive ("visible_string", name);
 168         break;
 169     case TTag:
 170         free_type (name, t->subtype, preserve);
 171         break;
 172     case TOID :
 173         free_primitive ("oid", name);
 174         break;
 175     default :
 176         abort ();
 177     }
 178 }
 179
 180 void
 181 generate_type_free (const Symbol *s)
 182 {
 183     int preserve = preserve_type(s->name) ? TRUE : FALSE;
 184
 185     fprintf (codefile, "void ASN1CALL\n"
 186              "free_%s(%s *data)\n"
 187              "{\n",
 188              s->gen_name, s->gen_name);
 189
 190     free_type ("data", s->type, preserve);
 191     fprintf (codefile, "}\n\n");
 192 }
 193