lib/asn1/gen_free.c

   1 /*
   2  * Copyright (c) 1997 - 2003 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 void
  39 free_primitive (const char *typename, const char *name)
  40 {
  41     fprintf (codefile, "free_%s(%s);\n", typename, name);
  42 }
  43
  44 static void
  45 free_type (const char *name, const Type *t)
  46 {
  47   switch (t->type) {
  48   case TType:
  49 #if 0
  50       free_type (name, t->symbol->type);
  51 #endif
  52       fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
  53       break;
  54   case TInteger:
  55   case TUInteger:
  56   case TEnumerated :
  57       break;
  58   case TOctetString:
  59       free_primitive ("octet_string", name);
  60       break;
  61   case TOID :
  62       free_primitive ("oid", 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                       "%s = NULL;\n"
  86                       "}\n", s, s);
  87           if (tag == -1)
  88               tag = m->val;
  89           free (s);
  90       }
  91       break;
  92   }
  93   case TSequenceOf: {
  94       char *n;
  95
  96       fprintf (codefile, "while((%s)->len){\n", name);
  97       asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name);
  98       free_type(n, t->subtype);
  99       fprintf(codefile,
 100               "(%s)->len--;\n"
 101               "}\n",
 102               name);
 103       fprintf(codefile,
 104               "free((%s)->val);\n"
 105               "(%s)->val = NULL;\n", name, name);
 106       free(n);
 107       break;
 108   }
 109   case TGeneralizedTime:
 110       break;
 111   case TGeneralString:
 112       free_primitive ("general_string", name);
 113       break;
 114   case TApplication:
 115       free_type (name, t->subtype);
 116       break;
 117   default :
 118       abort ();
 119   }
 120 }
 121
 122 void
 123 generate_type_free (const Symbol *s)
 124 {
 125   fprintf (headerfile,
 126            "void   free_%s  (%s *);\n",
 127            s->gen_name, s->gen_name);
 128
 129   fprintf (codefile, "void\n"
 130            "free_%s(%s *data)\n"
 131            "{\n",
 132            s->gen_name, s->gen_name);
 133
 134   free_type ("data", s->type);
 135   fprintf (codefile, "}\n\n");
 136 }
 137