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 RCSID("$Id$");
  38
  39 static Hashtab *htab;
  40
  41 static int
  42 cmp(void *a, void *b)
  43 {
  44     Symbol *s1 = (Symbol *) a;
  45     Symbol *s2 = (Symbol *) b;
  46
  47     return strcmp(s1->name, s2->name);
  48 }
  49
  50 static unsigned
  51 hash(void *a)
  52 {
  53     Symbol *s = (Symbol *) a;
  54
  55     return hashjpw(s->name);
  56 }
  57
  58 void
  59 initsym(void)
  60 {
  61     htab = hashtabnew(101, cmp, hash);
  62 }
  63
  64
  65 void
  66 output_name(char *s)
  67 {
  68     char *p;
  69
  70     for (p = s; *p; ++p)
  71         if (*p == '-')
  72             *p = '_';
  73 }
  74
  75 Symbol *
  76 addsym(char *name)
  77 {
  78     Symbol key, *s;
  79
  80     key.name = name;
  81     s = (Symbol *) hashtabsearch(htab, (void *) &key);
  82     if (s == NULL) {
  83         s = (Symbol *) emalloc(sizeof(*s));
  84         s->name = name;
  85         s->gen_name = estrdup(name);
  86         output_name(s->gen_name);
  87         s->stype = SUndefined;
  88         hashtabadd(htab, s);
  89     }
  90     return s;
  91 }
  92
  93 static int
  94 checkfunc(void *ptr, void *arg)
  95 {
  96     Symbol *s = ptr;
  97     if (s->stype == SUndefined) {
  98         error_message("%s is still undefined\n", s->name);
  99         *(int *) arg = 1;
 100     }
 101     return 0;
 102 }
 103
 104 int
 105 checkundefined(void)
 106 {
 107     int f = 0;
 108     hashtabforeach(htab, checkfunc, &f);
 109     return f;
 110 }