1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* ANSI Standard 4.3: CHARACTER HANDLING <ctype.h>
*/
#ifndef _CTYPE_H
#define _CTYPE_H 1
#include <features.h>
__BEGIN_DECLS
/* These are all the characteristics of characters.
If there get to be more than 16 distinct characteristics,
many things must be changed that use `unsigned short int's.
The characteristics are stored always in network byte order (big
endian). We define the bit value interpretations here dependent on the
machine's byte order. */
#include <endian.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define _ISbit(bit) (1 << bit)
#else /* __BYTE_ORDER == __LITTLE_ENDIAN */
#define _ISbit(bit) (bit < 8 ? ((1 << bit) << 8) : ((1 << bit) >> 8))
#endif
enum
{
_ISupper = _ISbit (0), /* UPPERCASE. */
_ISlower = _ISbit (1), /* lowercase. */
_ISalpha = _ISbit (2), /* Alphabetic. */
_ISdigit = _ISbit (3), /* Numeric. */
_ISxdigit = _ISbit (4), /* Hexadecimal numeric. */
_ISspace = _ISbit (5), /* Whitespace. */
_ISprint = _ISbit (6), /* Printing. */
_ISgraph = _ISbit (7), /* Graphical. */
_ISblank = _ISbit (8), /* Blank (usually SPC and TAB). */
_IScntrl = _ISbit (9), /* Control character. */
_ISpunct = _ISbit (10), /* Punctuation. */
/* The following are defined in POSIX.2 as being combinations of the
classes above. */
_ISalnum = _ISalpha | _ISdigit /* Alphanumeric. */
};
/* These are defined in ctype-info.c.
The declarations here must match those in localeinfo.h.
These point into arrays of 384, so they can be indexed by any `unsigned
char' value [0,255]; by EOF (-1); or by any `signed char' value
[-128,-1). ANSI requires that the ctype functions work for `unsigned
char' values and for EOF; we also support negative `signed char' values
for broken old programs. The case conversion arrays are of `int's
rather than `unsigned char's because tolower (EOF) must be EOF, which
doesn't fit into an `unsigned char'. */
extern __const unsigned short int *__ctype_b; /* Characteristics. */
extern __const int *__ctype_tolower; /* Case conversions. */
extern __const int *__ctype_toupper; /* Case conversions. */
#define __isctype(c, type) \
(__ctype_b[(int) (c)] & (unsigned short int) type)
#define __isascii(c) (((c) & (1 << 7)) == 0) /* If high bit is set. */
#define __toascii(c) ((c) & 0x7f) /* Mask off high bit. */
#define __tolower(c) ((int) __ctype_tolower[(int) (c)])
#define __toupper(c) ((int) __ctype_toupper[(int) (c)])
#define __exctype(name) extern int name __P ((int))
/* The following names are all functions:
int isCHARACTERISTIC(int c);
which return nonzero iff C has CHARACTERISTIC.
For the meaning of the characteristic names, see the `enum' above. */
__exctype (isalnum);
__exctype (isalpha);
__exctype (iscntrl);
__exctype (isdigit);
__exctype (islower);
__exctype (isgraph);
__exctype (isprint);
__exctype (ispunct);
__exctype (isspace);
__exctype (isupper);
__exctype (isxdigit);
#ifdef __USE_GNU
__exctype (isblank);
#endif
/* Return the lowercase version of C. */
extern int tolower __P ((int __c));
/* Return the uppercase version of C. */
extern int toupper __P ((int __c));
#if defined(__USE_SVID) || defined(__USE_MISC)
/* Return nonzero iff C is in the ASCII set
(i.e., is no more than 7 bits wide). */
extern int isascii __P ((int __c));
/* Return the part of C that is in the ASCII set
(i.e., the low-order 7 bits of C). */
extern int toascii __P ((int __c));
#endif /* Use SVID or use misc. */
#ifdef __USE_SVID
/* These are the same as `toupper' and `tolower'. */
__exctype (_toupper);
__exctype (_tolower);
#endif
#ifndef __NO_CTYPE
#define isalnum(c) __isctype((c), _ISalnum)
#define isalpha(c) __isctype((c), _ISalpha)
#define iscntrl(c) __isctype((c), _IScntrl)
#define isdigit(c) __isctype((c), _ISdigit)
#define islower(c) __isctype((c), _ISlower)
#define isgraph(c) __isctype((c), _ISgraph)
#define isprint(c) __isctype((c), _ISprint)
#define ispunct(c) __isctype((c), _ISpunct)
#define isspace(c) __isctype((c), _ISspace)
#define isupper(c) __isctype((c), _ISupper)
#define isxdigit(c) __isctype((c), _ISxdigit)
#ifdef __USE_GNU
#define isblank(c) __isctype((c), _ISblank)
#endif
#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)
#if defined(__USE_SVID) || defined(__USE_MISC)
#define isascii(c) __isascii(c)
#define toascii(c) __toascii(c)
#endif
#endif /* Not __NO_CTYPE. */
__END_DECLS
#endif /* ctype.h */
|
