lib/asn1/symbol.c

   1 /*
   2  * Copyright (c) 1997 - 2005 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 #include "lex.h"
  36
  37 static Hashtab *htab;
  38
  39 static int
  40 cmp(void *a, void *b)
  41 {
  42     Symbol *s1 = (Symbol *) a;
  43     Symbol *s2 = (Symbol *) b;
  44
  45     return strcmp(s1->name, s2->name);
  46 }
  47
  48 static unsigned
  49 hash(void *a)
  50 {
  51     Symbol *s = (Symbol *) a;
  52
  53     return hashjpw(s->name);
  54 }
  55
  56 void
  57 initsym(void)
  58 {
  59     htab = hashtabnew(101, cmp, hash);
  60 }
  61
  62
  63 void
  64 output_name(char *s)
  65 {
  66     char *p;
  67
  68     for (p = s; *p; ++p)
  69         if (*p == '-' || *p == '.')
  70             *p = '_';
  71 }
  72
  73 Symbol *
  74 addsym(char *name)
  75 {
  76     Symbol key, *s;
  77
  78     key.name = name;
  79     s = (Symbol *) hashtabsearch(htab, (void *) &key);
  80     if (s == NULL) {
  81         s = (Symbol *) ecalloc(1, sizeof(*s));
  82         s->name = name;
  83         s->gen_name = estrdup(name);
  84         output_name(s->gen_name);
  85         s->stype = SUndefined;
  86         hashtabadd(htab, s);
  87     }
  88     return s;
  89 }
  90
  91 static int
  92 checkfunc(void *ptr, void *arg)
  93 {
  94     Symbol *s = ptr;
  95     if (s->stype == SUndefined) {
  96         lex_error_message("%s is still undefined\n", s->name);
  97         *(int *) arg = 1;
  98     }
  99     return 0;
 100 }
 101
 102 int
 103 checkundefined(void)
 104 {
 105     int f = 0;
 106     hashtabforeach(htab, checkfunc, &f);
 107     return f;
 108 }