lib/asn1/gen_free.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 free_primitive (char *typename, char *name)
  45 {
  46     fprintf (codefile, "free_%s(%s);\n", typename, name);
  47 }
  48
  49 static void
  50 free_type (char *name, Type *t)
  51 {
  52   switch (t->type) {
  53   case TType:
  54 #if 0
  55       free_type (name, t->symbol->type);
  56 #endif
  57       fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
  58       break;
  59   case TInteger:
  60       break;
  61   case TOctetString:
  62       free_primitive ("octet_string", name);
  63       break;
  64   case TBitString: {
  65       break;
  66   }
  67   case TSequence: {
  68       Member *m;
  69       int tag = -1;
  70
  71       if (t->members == NULL)
  72           break;
  73
  74       for (m = t->members; m && tag != m->val; m = m->next) {
  75           char *s;
  76
  77           asprintf (&s, "%s(%s)->%s",
  78                     m->optional ? "" : "&", name, m->gen_name);
  79           if(m->optional)
  80               fprintf(codefile, "if(%s) {\n", s);
  81           free_type (s, m->type);
  82           if(m->optional)
  83               fprintf(codefile,
  84                       "free(%s);\n"
  85                       "}\n",s);
  86           if (tag == -1)
  87               tag = m->val;
  88           free (s);
  89       }
  90       break;
  91   }
  92   case TSequenceOf: {
  93       char *n;
  94
  95       fprintf (codefile, "while((%s)->len){\n", name);
  96       asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name);
  97       free_type(n, t->subtype);
  98       fprintf(codefile,
  99               "(%s)->len--;\n"
 100               "}\n",
 101               name);
 102       fprintf(codefile,
 103               "free((%s)->val);\n", name);
 104       free(n);
 105       break;
 106   }
 107   case TGeneralizedTime:
 108       break;
 109   case TGeneralString:
 110       free_primitive ("general_string", name);
 111       break;
 112   case TApplication:
 113       free_type (name, t->subtype);
 114       break;
 115   default :
 116       abort ();
 117   }
 118 }
 119
 120 void
 121 generate_type_free (Symbol *s)
 122 {
 123   fprintf (headerfile,
 124            "void   free_%s  (%s *);\n",
 125            s->gen_name, s->gen_name);
 126
 127   fprintf (codefile, "void\n"
 128            "free_%s(%s *data)\n"
 129            "{\n",
 130            s->gen_name, s->gen_name);
 131
 132   free_type ("data", s->type);
 133   fprintf (codefile, "}\n\n");
 134 }
 135