isctype.c revision 1.3 
1/*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#if defined(LIBC_SCCS) && !defined(lint)
40static char rcsid[] = "$OpenBSD: isctype.c,v 1.3 2001/06/27 07:17:07 pjanzen Exp $";
41#endif /* LIBC_SCCS and not lint */
42
43#define _ANSI_LIBRARY
44#include <ctype.h>
45#include <stdio.h>
46
47#undef isalnum
48int
49isalnum(c)
50	int c;
51{
52	if (c == EOF)
53		return(0);
54	return((_ctype_ + 1)[(unsigned char)c] & (_U|_L|_N));
55}
56
57#undef isalpha
58int
59isalpha(c)
60	int c;
61{
62	if (c == EOF)
63		return(0);
64	return((_ctype_ + 1)[(unsigned char)c] & (_U|_L));
65}
66
67#undef isblank
68int
69isblank(c)
70	int c;
71{
72	return(c == ' ' || c == '\t');
73}
74
75#undef iscntrl
76int
77iscntrl(c)
78	int c;
79{
80	if (c == EOF)
81		return(0);
82	return((_ctype_ + 1)[(unsigned char)c] & _C);
83}
84
85#undef isdigit
86int
87isdigit(c)
88	int c;
89{
90	if (c == EOF)
91		return(0);
92	return((_ctype_ + 1)[(unsigned char)c] & _N);
93}
94
95#undef isgraph
96int
97isgraph(c)
98	int c;
99{
100	if (c == EOF)
101		return(0);
102	return((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N));
103}
104
105#undef islower
106int
107islower(c)
108	int c;
109{
110	if (c == EOF)
111		return(0);
112	return((_ctype_ + 1)[(unsigned char)c] & _L);
113}
114
115#undef isprint
116int
117isprint(c)
118	int c;
119{
120	if (c == EOF)
121		return(0);
122	return((_ctype_ + 1)[(unsigned char)c] & (_P|_U|_L|_N|_B));
123}
124
125#undef ispunct
126int
127ispunct(c)
128	int c;
129{
130	if (c == EOF)
131		return(0);
132	return((_ctype_ + 1)[(unsigned char)c] & _P);
133}
134
135#undef isspace
136int
137isspace(c)
138	int c;
139{
140	if (c == EOF)
141		return(0);
142	return((_ctype_ + 1)[(unsigned char)c] & _S);
143}
144
145#undef isupper
146int
147isupper(c)
148	int c;
149{
150	if (c == EOF)
151		return(0);
152	return((_ctype_ + 1)[(unsigned char)c] & _U);
153}
154
155#undef isxdigit
156int
157isxdigit(c)
158	int c;
159{
160	if (c == EOF)
161		return(0);
162	return((_ctype_ + 1)[(unsigned char)c] & (_N|_X));
163}
164
165#undef isascii
166int
167isascii(c)
168	int c;
169{
170	if (c == EOF)
171		return(0);
172	return ((unsigned)(c) <= 0177);
173}
174
175#undef toascii
176int
177toascii(c)
178	int c;
179{
180	return ((c) & 0177);
181}
182
183#undef _toupper
184int
185_toupper(c)
186	int c;
187{
188	return (c - 'a' + 'A');
189}
190
191#undef _tolower
192int
193_tolower(c)
194	int c;
195{
196	return (c - 'A' + 'a');
197}
198