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

   1 /*
   2  * Copyright (c) 1997 - 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_free.c 19539 2006-12-28 17:15:05Z lha $"
  37         "$NetBSD$");
  38
  39 static void
  40 free_primitive (const char *typename, const char *name)
  41 {
  42     fprintf (codefile, "der_free_%s(%s);\n", typename, name);
  43 }
  44
  45 static void
  46 free_type (const char *name, const Type *t, int preserve)
  47 {
  48     switch (t->type) {
  49     case TType:
  50 #if 0
  51         free_type (name, t->symbol->type, preserve);
  52 #endif
  53         fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
  54         break;
  55     case TInteger:
  56         if (t->range == NULL && t->members == NULL) {
  57             free_primitive ("heim_integer", name);
  58             break;
  59         }
  60     case TBoolean:
  61     case TEnumerated :
  62     case TNull:
  63     case TGeneralizedTime:
  64     case TUTCTime:
  65         break;
  66     case TBitString:
  67         if (ASN1_TAILQ_EMPTY(t->members))
  68             free_primitive("bit_string", name);
  69         break;
  70     case TOctetString:
  71         free_primitive ("octet_string", name);
  72         break;
  73     case TChoice:
  74     case TSet:
  75     case TSequence: {
  76         Member *m, *have_ellipsis = NULL;
  77
  78         if (t->members == NULL)
  79             break;
  80
  81         if ((t->type == TSequence || t->type == TChoice) && preserve)
  82             fprintf(codefile, "der_free_octet_string(&data->_save);\n");
  83
  84         if(t->type == TChoice)
  85             fprintf(codefile, "switch((%s)->element) {\n", name);
  86
  87         ASN1_TAILQ_FOREACH(m, t->members, members) {
  88             char *s;
  89
  90             if (m->ellipsis){
  91                 have_ellipsis = m;
  92                 continue;
  93             }
  94
  95             if(t->type == TChoice)
  96                 fprintf(codefile, "case %s:\n", m->label);
  97             asprintf (&s, "%s(%s)->%s%s",
  98                       m->optional ? "" : "&", name,
  99                       t->type == TChoice ? "u." : "", m->gen_name);
 100             if (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         asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name);
 133         if (n == NULL)
 134             errx(1, "malloc");
 135         free_type(n, t->subtype, FALSE);
 136         fprintf(codefile,
 137                 "(%s)->len--;\n"
 138                 "}\n",
 139                 name);
 140         fprintf(codefile,
 141                 "free((%s)->val);\n"
 142                 "(%s)->val = NULL;\n", name, name);
 143         free(n);
 144         break;
 145     }
 146     case TGeneralString:
 147         free_primitive ("general_string", name);
 148         break;
 149     case TUTF8String:
 150         free_primitive ("utf8string", name);
 151         break;
 152     case TPrintableString:
 153         free_primitive ("printable_string", name);
 154         break;
 155     case TIA5String:
 156         free_primitive ("ia5_string", name);
 157         break;
 158     case TBMPString:
 159         free_primitive ("bmp_string", name);
 160         break;
 161     case TUniversalString:
 162         free_primitive ("universal_string", name);
 163         break;
 164     case TVisibleString:
 165         free_primitive ("visible_string", name);
 166         break;
 167     case TTag:
 168         free_type (name, t->subtype, preserve);
 169         break;
 170     case TOID :
 171         free_primitive ("oid", name);
 172         break;
 173     default :
 174         abort ();
 175     }
 176 }
 177
 178 void
 179 generate_type_free (const Symbol *s)
 180 {
 181   int preserve = preserve_type(s->name) ? TRUE : FALSE;
 182
 183   fprintf (headerfile,
 184            "void   free_%s  (%s *);\n",
 185            s->gen_name, s->gen_name);
 186
 187   fprintf (codefile, "void\n"
 188            "free_%s(%s *data)\n"
 189            "{\n",
 190            s->gen_name, s->gen_name);
 191
 192   free_type ("data", s->type, preserve);
 193   fprintf (codefile, "}\n\n");
 194 }
 195