lib/asn1/gen_copy.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("$Id$");
  37
  38 static int used_fail;
  39
  40 static void
  41 copy_primitive (const char *typename, const char *from, const char *to)
  42 {
  43     fprintf (codefile, "if(der_copy_%s(%s, %s)) goto fail;\n",
  44              typename, from, to);
  45     used_fail++;
  46 }
  47
  48 static void
  49 copy_type (const char *from, const char *to, const Type *t, int preserve)
  50 {
  51     switch (t->type) {
  52     case TType:
  53 #if 0
  54         copy_type (from, to, t->symbol->type, preserve);
  55 #endif
  56         fprintf (codefile, "if(copy_%s(%s, %s)) goto fail;\n",
  57                  t->symbol->gen_name, from, to);
  58         used_fail++;
  59         break;
  60     case TInteger:
  61         if (t->range == NULL && t->members == NULL) {
  62             copy_primitive ("heim_integer", from, to);
  63             break;
  64         }
  65     case TBoolean:
  66     case TEnumerated :
  67         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  68         break;
  69     case TOctetString:
  70         copy_primitive ("octet_string", from, to);
  71         break;
  72     case TBitString:
  73         if (ASN1_TAILQ_EMPTY(t->members))
  74             copy_primitive ("bit_string", from, to);
  75         else
  76             fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  77         break;
  78     case TSet:
  79     case TSequence:
  80     case TChoice: {
  81         Member *m, *have_ellipsis = NULL;
  82
  83         if(t->members == NULL)
  84             break;
  85
  86         if ((t->type == TSequence || t->type == TChoice) && preserve) {
  87             fprintf(codefile,
  88                     "{ int ret;\n"
  89                     "ret = der_copy_octet_string(&(%s)->_save, &(%s)->_save);\n"
  90                     "if (ret) goto fail;\n"
  91                     "}\n",
  92                     from, to);
  93             used_fail++;
  94         }
  95
  96         if(t->type == TChoice) {
  97             fprintf(codefile, "(%s)->element = (%s)->element;\n", to, from);
  98             fprintf(codefile, "switch((%s)->element) {\n", from);
  99         }
 100
 101         ASN1_TAILQ_FOREACH(m, t->members, members) {
 102             char *fs;
 103             char *ts;
 104
 105             if (m->ellipsis) {
 106                 have_ellipsis = m;
 107                 continue;
 108             }
 109
 110             if(t->type == TChoice)
 111                 fprintf(codefile, "case %s:\n", m->label);
 112
 113             asprintf (&fs, "%s(%s)->%s%s",
 114                       m->optional ? "" : "&", from,
 115                       t->type == TChoice ? "u." : "", m->gen_name);
 116             if (fs == NULL)
 117                 errx(1, "malloc");
 118             asprintf (&ts, "%s(%s)->%s%s",
 119                       m->optional ? "" : "&", to,
 120                       t->type == TChoice ? "u." : "", m->gen_name);
 121             if (ts == NULL)
 122                 errx(1, "malloc");
 123             if(m->optional){
 124                 fprintf(codefile, "if(%s) {\n", fs);
 125                 fprintf(codefile, "%s = malloc(sizeof(*%s));\n", ts, ts);
 126                 fprintf(codefile, "if(%s == NULL) goto fail;\n", ts);
 127                 used_fail++;
 128             }
 129             copy_type (fs, ts, m->type, FALSE);
 130             if(m->optional){
 131                 fprintf(codefile, "}else\n");
 132                 fprintf(codefile, "%s = NULL;\n", ts);
 133             }
 134             free (fs);
 135             free (ts);
 136             if(t->type == TChoice)
 137                 fprintf(codefile, "break;\n");
 138         }
 139         if(t->type == TChoice) {
 140             if (have_ellipsis) {
 141                 fprintf(codefile, "case %s: {\n"
 142                         "int ret;\n"
 143                         "ret=der_copy_octet_string(&(%s)->u.%s, &(%s)->u.%s);\n"
 144                         "if (ret) goto fail;\n"
 145                         "break;\n"
 146                         "}\n",
 147                         have_ellipsis->label,
 148                         from, have_ellipsis->gen_name,
 149                         to, have_ellipsis->gen_name);
 150                 used_fail++;
 151             }
 152             fprintf(codefile, "}\n");
 153         }
 154         break;
 155     }
 156     case TSetOf:
 157     case TSequenceOf: {
 158         char *f;
 159         char *T;
 160
 161         fprintf (codefile, "if(((%s)->val = "
 162                  "malloc((%s)->len * sizeof(*(%s)->val))) == NULL && (%s)->len != 0)\n",
 163                  to, from, to, from);
 164         fprintf (codefile, "goto fail;\n");
 165         used_fail++;
 166         fprintf(codefile,
 167                 "for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
 168                 to, to, from, to);
 169         asprintf(&f, "&(%s)->val[(%s)->len]", from, to);
 170         if (f == NULL)
 171             errx(1, "malloc");
 172         asprintf(&T, "&(%s)->val[(%s)->len]", to, to);
 173         if (T == NULL)
 174             errx(1, "malloc");
 175         copy_type(f, T, t->subtype, FALSE);
 176         fprintf(codefile, "}\n");
 177         free(f);
 178         free(T);
 179         break;
 180     }
 181     case TGeneralizedTime:
 182         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 183         break;
 184     case TGeneralString:
 185         copy_primitive ("general_string", from, to);
 186         break;
 187     case TTeletexString:
 188         copy_primitive ("general_string", from, to);
 189         break;
 190     case TUTCTime:
 191         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 192         break;
 193     case TUTF8String:
 194         copy_primitive ("utf8string", from, to);
 195         break;
 196     case TPrintableString:
 197         copy_primitive ("printable_string", from, to);
 198         break;
 199     case TIA5String:
 200         copy_primitive ("ia5_string", from, to);
 201         break;
 202     case TBMPString:
 203         copy_primitive ("bmp_string", from, to);
 204         break;
 205     case TUniversalString:
 206         copy_primitive ("universal_string", from, to);
 207         break;
 208     case TVisibleString:
 209         copy_primitive ("visible_string", from, to);
 210         break;
 211     case TTag:
 212         copy_type (from, to, t->subtype, preserve);
 213         break;
 214     case TOID:
 215         copy_primitive ("oid", from, to);
 216         break;
 217     case TNull:
 218         break;
 219     default :
 220         abort ();
 221     }
 222 }
 223
 224 void
 225 generate_type_copy (const Symbol *s)
 226 {
 227   int preserve = preserve_type(s->name) ? TRUE : FALSE;
 228
 229   used_fail = 0;
 230
 231   fprintf (headerfile,
 232            "int    copy_%s  (const %s *, %s *);\n",
 233            s->gen_name, s->gen_name, s->gen_name);
 234
 235   fprintf (codefile, "int\n"
 236            "copy_%s(const %s *from, %s *to)\n"
 237            "{\n"
 238            "memset(to, 0, sizeof(*to));\n",
 239            s->gen_name, s->gen_name, s->gen_name);
 240   copy_type ("from", "to", s->type, preserve);
 241   fprintf (codefile, "return 0;\n");
 242
 243   if (used_fail)
 244       fprintf (codefile, "fail:\n"
 245                "free_%s(to);\n"
 246                "return ENOMEM;\n",
 247                s->gen_name);
 248
 249   fprintf(codefile,
 250           "}\n\n");
 251 }
 252