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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/* Copyright (C) 1991, 92, 93, 95, 96, 97 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 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/*
* ISO C Standard 4.3: CHARACTER HANDLING <ctype.h>
*/
#ifndef _CTYPE_H
#define _CTYPE_H 1
#include <features.h>
#include <bits/types.h>
__BEGIN_DECLS
#ifndef _ISbit
/* 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. */
_ISalnum = _ISbit (11) /* Alphanumeric. */
};
#endif /* ! _ISbit */
/* 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). ISO C 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'. But today more important is that
the arrays are also used for multi-byte character sets. */
extern __const unsigned short int *__ctype_b; /* Characteristics. */
extern __const __int32_t *__ctype_tolower; /* Case conversions. */
extern __const __int32_t *__ctype_toupper; /* Case conversions. */
#define __isctype(c, type) \
(__ctype_b[(int) (c)] & (unsigned short int) type)
#define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
#define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
#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 || defined __USE_XOPEN
/* 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. */
#if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
/* 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 || defined __USE_XOPEN
# define isascii(c) __isascii(c)
# define toascii(c) __toascii(c)
#endif
#endif /* Not __NO_CTYPE. */
#ifdef __USE_GNU
/* The concept of one static locale per category is not very well
thought out. Many applications will need to process its data using
information from several different locales. Another application is
the implementation of the internationalization handling in the
upcoming ISO C++ standard library. To support this another set of
the functions using locale data exist which have an additional
argument.
Attention: all these functions are *not* standardized in any form.
This is a proof-of-concept implementation. */
/* Structure for reentrant locale using functions. This is an
(almost) opaque type for the user level programs. */
# include <xlocale.h>
/* These definitions are similar to the ones above but all functions
take as an argument a handle for the locale which shall be used. */
# define __isctype_l(c, type, locale) \
((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)
# define __tolower_l(c, locale) ((int) (locale)->__ctype_tolower[(int) (c)])
# define __toupper_l(c, locale) ((int) (locale)->__ctype_toupper[(int) (c)])
# define __exctype_l(name) extern int name __P ((int, __locale_t))
/* The following names are all functions:
int isCHARACTERISTIC(int c, locale_t *locale);
which return nonzero iff C has CHARACTERISTIC.
For the meaning of the characteristic names, see the `enum' above. */
__exctype_l (__isalnum_l);
__exctype_l (__isalpha_l);
__exctype_l (__iscntrl_l);
__exctype_l (__isdigit_l);
__exctype_l (__islower_l);
__exctype_l (__isgraph_l);
__exctype_l (__isprint_l);
__exctype_l (__ispunct_l);
__exctype_l (__isspace_l);
__exctype_l (__isupper_l);
__exctype_l (__isxdigit_l);
__exctype_l (__isblank_l);
/* Return the lowercase version of C in locale L. */
extern int __tolower_l __P ((int __c, __locale_t __l));
/* Return the uppercase version of C. */
extern int __toupper_l __P ((int __c, __locale_t __l));
# ifndef __NO_CTYPE
# define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l))
# define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l))
# define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l))
# define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l))
# define __islower_l(c,l) __isctype_l((c), _ISlower, (l))
# define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l))
# define __isprint_l(c,l) __isctype_l((c), _ISprint, (l))
# define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l))
# define __isspace_l(c,l) __isctype_l((c), _ISspace, (l))
# define __isupper_l(c,l) __isctype_l((c), _ISupper, (l))
# define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l))
# define __isblank_l(c,l) __isctype_l((c), _ISblank, (l))
# if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
# define __isascii_l(c,l) __isascii(c)
# define __toascii_l(c,l) __toascii(c)
# endif
# endif /* Not __NO_CTYPE. */
#endif /* Use GNU. */
__END_DECLS
#endif /* ctype.h */
|
