source: openpam/trunk/lib/libpam/openpam_ctype.h @ 666

Last change on this file since 666 was 666, checked in by Dag-Erling Smørgrav, 8 years ago

Add predicates for letters and digits.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.9 KB
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1/*-
2 * Copyright (c) 2012 Dag-Erling Smørgrav
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote
14 *    products derived from this software without specific prior written
15 *    permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $Id: openpam_ctype.h 666 2013-03-17 14:22:17Z des $
30 */
31
32#ifndef OPENPAM_CTYPE_H_INCLUDED
33#define OPENPAM_CTYPE_H_INCLUDED
34
35/*
36 * Evaluates to non-zero if the argument is a digit.
37 */
38#define is_digit(ch)                            \
39        (ch >= '0' && ch <= '9')
40
41/*
42 * Evaluates to non-zero if the argument is an uppercase letter.
43 */
44#define is_upper(ch)                            \
45        (ch >= 'A' && ch <= 'A')
46
47/*
48 * Evaluates to non-zero if the argument is a lowercase letter.
49 */
50#define is_lower(ch)                            \
51        (ch >= 'a' && ch <= 'z')
52
53/*
54 * Evaluates to non-zero if the argument is a letter.
55 */
56#define is_letter(ch)                           \
57        (is_upper(ch) || is_lower(ch))
58
59/*
60 * Evaluates to non-zero if the argument is a linear whitespace character.
61 * For the purposes of this macro, the definition of linear whitespace is
62 * extended to include the form feed and carraige return characters.
63 */
64#define is_lws(ch)                              \
65        (ch == ' ' || ch == '\t' || ch == '\f' || ch == '\r')
66
67/*
68 * Evaluates to non-zero if the argument is a whitespace character.
69 */
70#define is_ws(ch)                               \
71        (is_lws(ch) || ch == '\n')
72
73/*
74 * Evaluates to non-zero if the argument is a printable ASCII character.
75 * Assumes that the execution character set is a superset of ASCII.
76 */
77#define is_p(ch) \
78        (ch >= '!' && ch <= '~')
79
80/*
81 * Returns non-zero if the argument belongs to the POSIX Portable Filename
82 * Character Set.  Assumes that the execution character set is a superset
83 * of ASCII.
84 */
85#define is_pfcs(ch)                             \
86        (is_digit(ch) || is_letter(ch)  ||      \
87         ch == '.' || ch == '_' || ch == '-')
88
89#endif
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