1 /* $NetBSD: symbol.c,v 1.2 2017/01/28 21:31:45 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
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 #include "lex.h"
38
39 static Hashtab *htab;
40
41 static int
cmp(void * a,void * b)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
hash(void * a)51 hash(void *a)
52 {
53 Symbol *s = (Symbol *) a;
54
55 return hashjpw(s->name);
56 }
57
58 void
initsym(void)59 initsym(void)
60 {
61 htab = hashtabnew(101, cmp, hash);
62 }
63
64
65 void
output_name(char * s)66 output_name(char *s)
67 {
68 char *p;
69
70 for (p = s; *p; ++p)
71 if (*p == '-' || *p == '.')
72 *p = '_';
73 }
74
75 Symbol *
addsym(char * name)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 *) ecalloc(1, 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
checkfunc(void * ptr,void * arg)94 checkfunc(void *ptr, void *arg)
95 {
96 Symbol *s = ptr;
97 if (s->stype == SUndefined) {
98 lex_error_message("%s is still undefined\n", s->name);
99 *(int *) arg = 1;
100 }
101 return 0;
102 }
103
104 int
checkundefined(void)105 checkundefined(void)
106 {
107 int f = 0;
108 hashtabforeach(htab, checkfunc, &f);
109 return f;
110 }
111