lib/asn1/gen_seq.c

   1 /*
   2  * Copyright (c) 1997 - 2006 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 void
  39 generate_type_seq (const Symbol *s)
  40 {
  41     char *subname;
  42     Type *type;
  43
  44     if (!seq_type(s->name))
  45         return;
  46     type = s->type;
  47     while(type->type == TTag)
  48         type = type->subtype;
  49
  50     if (type->type != TSequenceOf) {
  51         printf("%s not seq of %d\n", s->name, (int)type->type);
  52         return;
  53     }
  54
  55     /*
  56      * Require the subtype to be a type so we can name it and use
  57      * copy_/free_
  58      */
  59
  60     if (type->subtype->type != TType) {
  61         fprintf(stderr, "%s subtype is not a type, can't generate "
  62                "sequence code for this case: %d\n",
  63                 s->name, (int)type->subtype->type);
  64         exit(1);
  65     }
  66
  67     subname = type->subtype->symbol->gen_name;
  68
  69     fprintf (headerfile,
  70              "int   add_%s  (%s *, const %s *);\n"
  71              "int   remove_%s  (%s *, unsigned int);\n",
  72              s->gen_name, s->gen_name, subname,
  73              s->gen_name, s->gen_name);
  74
  75     fprintf (codefile, "int\n"
  76              "add_%s(%s *data, const %s *element)\n"
  77              "{\n",
  78              s->gen_name, s->gen_name, subname);
  79
  80     fprintf (codefile,
  81              "int ret;\n"
  82              "void *ptr;\n"
  83              "\n"
  84              "ptr = realloc(data->val, \n"
  85              "\t(data->len + 1) * sizeof(data->val[0]));\n"
  86              "if (ptr == NULL) return ENOMEM;\n"
  87              "data->val = ptr;\n\n"
  88              "ret = copy_%s(element, &data->val[data->len]);\n"
  89              "if (ret) return ret;\n"
  90              "data->len++;\n"
  91              "return 0;\n",
  92              subname);
  93
  94     fprintf (codefile, "}\n\n");
  95
  96     fprintf (codefile, "int\n"
  97              "remove_%s(%s *data, unsigned int element)\n"
  98              "{\n",
  99              s->gen_name, s->gen_name);
 100
 101     fprintf (codefile,
 102              "void *ptr;\n"
 103              "\n"
 104              "if (data->len == 0 || element >= data->len)\n"
 105              "\treturn ASN1_OVERRUN;\n"
 106              "free_%s(&data->val[element]);\n"
 107              "data->len--;\n"
 108              /* don't move if its the last element */
 109              "if (element < data->len)\n"
 110              "\tmemmove(&data->val[element], &data->val[element + 1], \n"
 111              "\t\tsizeof(data->val[0]) * data->len);\n"
 112              /* resize but don't care about failures since it doesn't matter */
 113              "ptr = realloc(data->val, data->len * sizeof(data->val[0]));\n"
 114              "if (ptr != NULL || data->len == 0) data->val = ptr;\n"
 115              "return 0;\n",
 116              subname);
 117
 118     fprintf (codefile, "}\n\n");
 119 }