crypto/external/bsd/heimdal/dist/lib/asn1/gen_seq.c

   1 /*      $NetBSD: gen_seq.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $   */
   2
   3 /*
   4  * Copyright (c) 1997 - 2006 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "gen_locl.h"
  37
  38 __RCSID("NetBSD");
  39
  40 void
  41 generate_type_seq (const Symbol *s)
  42 {
  43     char *subname;
  44     Type *type;
  45
  46     if (!seq_type(s->name))
  47         return;
  48     type = s->type;
  49     while(type->type == TTag)
  50         type = type->subtype;
  51
  52     if (type->type != TSequenceOf && type->type != TSetOf) {
  53         fprintf(stderr, "%s not seq of %d\n", s->name, (int)type->type);
  54         return;
  55     }
  56
  57     /*
  58      * Require the subtype to be a type so we can name it and use
  59      * copy_/free_
  60      */
  61
  62     if (type->subtype->type != TType) {
  63         fprintf(stderr, "%s subtype is not a type, can't generate "
  64                "sequence code for this case: %d\n",
  65                 s->name, (int)type->subtype->type);
  66         exit(1);
  67     }
  68
  69     subname = type->subtype->symbol->gen_name;
  70
  71     fprintf (headerfile,
  72              "ASN1EXP int   ASN1CALL add_%s  (%s *, const %s *);\n"
  73              "ASN1EXP int   ASN1CALL remove_%s  (%s *, unsigned int);\n",
  74              s->gen_name, s->gen_name, subname,
  75              s->gen_name, s->gen_name);
  76
  77     fprintf (codefile, "int ASN1CALL\n"
  78              "add_%s(%s *data, const %s *element)\n"
  79              "{\n",
  80              s->gen_name, s->gen_name, subname);
  81
  82     fprintf (codefile,
  83              "int ret;\n"
  84              "void *ptr;\n"
  85              "\n"
  86              "ptr = realloc(data->val, \n"
  87              "\t(data->len + 1) * sizeof(data->val[0]));\n"
  88              "if (ptr == NULL) return ENOMEM;\n"
  89              "data->val = ptr;\n\n"
  90              "ret = copy_%s(element, &data->val[data->len]);\n"
  91              "if (ret) return ret;\n"
  92              "data->len++;\n"
  93              "return 0;\n",
  94              subname);
  95
  96     fprintf (codefile, "}\n\n");
  97
  98     fprintf (codefile, "int ASN1CALL\n"
  99              "remove_%s(%s *data, unsigned int element)\n"
 100              "{\n",
 101              s->gen_name, s->gen_name);
 102
 103     fprintf (codefile,
 104              "void *ptr;\n"
 105              "\n"
 106              "if (data->len == 0 || element >= data->len)\n"
 107              "\treturn ASN1_OVERRUN;\n"
 108              "free_%s(&data->val[element]);\n"
 109              "data->len--;\n"
 110              /* don't move if its the last element */
 111              "if (element < data->len)\n"
 112              "\tmemmove(&data->val[element], &data->val[element + 1], \n"
 113              "\t\tsizeof(data->val[0]) * (data->len - element));\n"
 114              /* resize but don't care about failures since it doesn't matter */
 115              "ptr = realloc(data->val, data->len * sizeof(data->val[0]));\n"
 116              "if (ptr != NULL || data->len == 0) data->val = ptr;\n"
 117              "return 0;\n",
 118              subname);
 119
 120     fprintf (codefile, "}\n\n");
 121 }