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      1 /*	$NetBSD: gen_seq.c,v 1.2 2017/01/28 21:31:45 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 - 2006 Kungliga Tekniska Hgskolan
      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: gen_seq.c,v 1.2 2017/01/28 21:31:45 christos Exp $");
     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 }
    122