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
37static Hashtab *htab;
38
39static int
40cmp(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
48static unsigned
49hash(void *a)
50{
51    Symbol *s = (Symbol *) a;
52
53    return hashjpw(s->name);
54}
55
56void
57initsym(void)
58{
59    htab = hashtabnew(101, cmp, hash);
60}
61
62
63void
64output_name(char *s)
65{
66    char *p;
67
68    for (p = s; *p; ++p)
69	if (*p == '-' || *p == '.')
70	    *p = '_';
71}
72
73Symbol *
74addsym(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 *) emalloc(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
91static int
92checkfunc(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
102int
103checkundefined(void)
104{
105    int f = 0;
106    hashtabforeach(htab, checkfunc, &f);
107    return f;
108}
109