lib/asn1/gen_copy.c

   1 /*
   2  * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by Kungliga Tekniska
  20  *      Högskolan and its contributors.
  21  *
  22  * 4. Neither the name of the Institute nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  */
  38
  39 #include "gen_locl.h"
  40
  41 RCSID("$Id$");
  42
  43 static void
  44 copy_primitive (char *typename, char *from, char *to)
  45 {
  46     fprintf (codefile, "if(copy_%s(%s, %s)) return ENOMEM;\n",
  47              typename, from, to);
  48 }
  49
  50 static void
  51 copy_type (char *from, char *to, Type *t)
  52 {
  53   switch (t->type) {
  54   case TType:
  55 #if 0
  56       copy_type (from, to, t->symbol->type);
  57 #endif
  58       fprintf (codefile, "if(copy_%s(%s, %s)) return ENOMEM;\n",
  59                t->symbol->gen_name, from, to);
  60       break;
  61   case TInteger:
  62       fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  63       break;
  64   case TOctetString:
  65       copy_primitive ("octet_string", from, to);
  66       break;
  67   case TBitString: {
  68       fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  69       break;
  70   }
  71   case TSequence: {
  72       Member *m;
  73       int tag = -1;
  74
  75       if (t->members == NULL)
  76           break;
  77
  78       for (m = t->members; m && tag != m->val; m = m->next) {
  79           char *f;
  80           char *t;
  81
  82           asprintf (&f, "%s(%s)->%s",
  83                     m->optional ? "" : "&", from, m->gen_name);
  84           asprintf (&t, "%s(%s)->%s",
  85                     m->optional ? "" : "&", to, m->gen_name);
  86           if(m->optional){
  87               fprintf(codefile, "if(%s) {\n", f);
  88               fprintf(codefile, "%s = malloc(sizeof(*%s));\n", t, t);
  89               fprintf(codefile, "if(%s == NULL) return ENOMEM;\n", t);
  90           }
  91           copy_type (f, t, m->type);
  92           if(m->optional){
  93               fprintf(codefile, "}else\n");
  94               fprintf(codefile, "%s = NULL;\n", t);
  95           }
  96           if (tag == -1)
  97               tag = m->val;
  98           free (f);
  99           free (t);
 100       }
 101       break;
 102   }
 103   case TSequenceOf: {
 104       char *f;
 105       char *T;
 106
 107       fprintf (codefile, "if(((%s)->val = "
 108                "malloc((%s)->len * sizeof(*(%s)->val))) == NULL)\n",
 109                to, from, to);
 110       fprintf (codefile, "return ENOMEM;\n");
 111       fprintf(codefile,
 112               "for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
 113               to, to, from, to);
 114       asprintf(&f, "&(%s)->val[(%s)->len]", from, to);
 115       asprintf(&T, "&(%s)->val[(%s)->len]", to, to);
 116       copy_type(f, T, t->subtype);
 117       fprintf(codefile, "}\n");
 118       free(f);
 119       free(T);
 120       break;
 121   }
 122   case TGeneralizedTime:
 123       fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 124       break;
 125   case TGeneralString:
 126       copy_primitive ("general_string", from, to);
 127       break;
 128   case TApplication:
 129       copy_type (from, to, t->subtype);
 130       break;
 131   default :
 132       abort ();
 133   }
 134 }
 135
 136 void
 137 generate_type_copy (Symbol *s)
 138 {
 139   fprintf (headerfile,
 140            "int    copy_%s  (const %s *, %s *);\n",
 141            s->gen_name, s->gen_name, s->gen_name);
 142
 143   fprintf (codefile, "int\n"
 144            "copy_%s(const %s *from, %s *to)\n"
 145            "{\n",
 146            s->gen_name, s->gen_name, s->gen_name);
 147
 148   copy_type ("from", "to", s->type);
 149   fprintf (codefile, "return 0;\n}\n\n");
 150 }
 151