symbol.c revision 90926 
1/*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan
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
36RCSID("$Id: symbol.c,v 1.9 2001/09/25 13:39:27 assar Exp $");
37
38static Hashtab *htab;
39
40static int
41cmp (void *a, void *b)
42{
43  Symbol *s1 = (Symbol *)a;
44  Symbol *s2 = (Symbol *)b;
45
46  return strcmp (s1->name, s2->name);
47}
48
49static unsigned
50hash (void *a)
51{
52  Symbol *s = (Symbol *)a;
53
54  return hashjpw (s->name);
55}
56
57void
58initsym (void)
59{
60  htab = hashtabnew (101, cmp, hash);
61}
62
63
64void
65output_name (char *s)
66{
67  char *p;
68
69  for (p = s; *p; ++p)
70    if (*p == '-')
71      *p = '_';
72}
73
74Symbol*
75addsym (char *name)
76{
77  Symbol key, *s;
78
79  key.name = name;
80  s = (Symbol *)hashtabsearch (htab, (void *)&key);
81  if (s == NULL) {
82    s = (Symbol *)malloc (sizeof (*s));
83    s->name = name;
84    s->gen_name = strdup(name);
85    output_name (s->gen_name);
86    s->stype = SUndefined;
87    hashtabadd (htab, s);
88  }
89  return s;
90}
91