1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
20 * ISO C99 Standard 7.4: Character handling <ctype.h>
27 #include <bits/types.h>
32 /* These are all the characteristics of characters.
33 If there get to be more than 16 distinct characteristics,
34 many things must be changed that use `unsigned short int's.
36 The characteristics are stored always in network byte order (big
37 endian). We define the bit value interpretations here dependent on the
38 machine's byte order. */
41 # if __BYTE_ORDER == __BIG_ENDIAN
42 # define _ISbit(bit) (1 << (bit))
43 # else /* __BYTE_ORDER == __LITTLE_ENDIAN */
44 # define _ISbit(bit) ((bit) < 8 ? ((1 << (bit)) << 8) : ((1 << (bit)) >> 8))
49 _ISupper
= _ISbit (0), /* UPPERCASE. */
50 _ISlower
= _ISbit (1), /* lowercase. */
51 _ISalpha
= _ISbit (2), /* Alphabetic. */
52 _ISdigit
= _ISbit (3), /* Numeric. */
53 _ISxdigit
= _ISbit (4), /* Hexadecimal numeric. */
54 _ISspace
= _ISbit (5), /* Whitespace. */
55 _ISprint
= _ISbit (6), /* Printing. */
56 _ISgraph
= _ISbit (7), /* Graphical. */
57 _ISblank
= _ISbit (8), /* Blank (usually SPC and TAB). */
58 _IScntrl
= _ISbit (9), /* Control character. */
59 _ISpunct
= _ISbit (10), /* Punctuation. */
60 _ISalnum
= _ISbit (11) /* Alphanumeric. */
64 /* These are defined in ctype-info.c.
65 The declarations here must match those in localeinfo.h.
67 These point into arrays of 384, so they can be indexed by any `unsigned
68 char' value [0,255]; by EOF (-1); or by any `signed char' value
69 [-128,-1). ISO C requires that the ctype functions work for `unsigned
70 char' values and for EOF; we also support negative `signed char' values
71 for broken old programs. The case conversion arrays are of `int's
72 rather than `unsigned char's because tolower (EOF) must be EOF, which
73 doesn't fit into an `unsigned char'. But today more important is that
74 the arrays are also used for multi-byte character sets. */
75 extern __const
unsigned short int *__ctype_b
; /* Characteristics. */
76 extern __const __int32_t
*__ctype_tolower
; /* Case conversions. */
77 extern __const __int32_t
*__ctype_toupper
; /* Case conversions. */
79 #define __isctype(c, type) \
80 (__ctype_b[(int) (c)] & (unsigned short int) type)
82 #define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
83 #define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
85 #define __exctype(name) extern int name (int) __THROW
87 /* The following names are all functions:
88 int isCHARACTERISTIC(int c);
89 which return nonzero iff C has CHARACTERISTIC.
90 For the meaning of the characteristic names, see the `enum' above. */
101 __exctype (isxdigit
);
108 /* Return the lowercase version of C. */
109 extern int tolower (int __c
) __THROW
;
111 /* Return the uppercase version of C. */
112 extern int toupper (int __c
) __THROW
;
115 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
117 /* Return nonzero iff C is in the ASCII set
118 (i.e., is no more than 7 bits wide). */
119 extern int isascii (int __c
) __THROW
;
121 /* Return the part of C that is in the ASCII set
122 (i.e., the low-order 7 bits of C). */
123 extern int toascii (int __c
) __THROW
;
125 /* These are the same as `toupper' and `tolower' except that they do not
126 check the argument for being in the range of a `char'. */
127 __exctype (_toupper
);
128 __exctype (_tolower
);
129 #endif /* Use SVID or use misc. */
131 /* This code is needed for the optimized mapping functions. */
132 #define __tobody(c, f, a, args) \
135 if (sizeof (c) > 1) \
137 if (__builtin_constant_p (c)) \
140 __res = __c < -128 || __c > 255 ? __c : a[__c]; \
146 __res = a[(int) (c)]; \
150 # define isalnum(c) __isctype((c), _ISalnum)
151 # define isalpha(c) __isctype((c), _ISalpha)
152 # define iscntrl(c) __isctype((c), _IScntrl)
153 # define isdigit(c) __isctype((c), _ISdigit)
154 # define islower(c) __isctype((c), _ISlower)
155 # define isgraph(c) __isctype((c), _ISgraph)
156 # define isprint(c) __isctype((c), _ISprint)
157 # define ispunct(c) __isctype((c), _ISpunct)
158 # define isspace(c) __isctype((c), _ISspace)
159 # define isupper(c) __isctype((c), _ISupper)
160 # define isxdigit(c) __isctype((c), _ISxdigit)
163 # define isblank(c) __isctype((c), _ISblank)
166 # ifdef __USE_EXTERN_INLINES
168 tolower (int __c
) __THROW
170 return __c
>= -128 && __c
< 256 ? __ctype_tolower
[__c
] : __c
;
174 toupper (int __c
) __THROW
176 return __c
>= -128 && __c
< 256 ? __ctype_toupper
[__c
] : __c
;
180 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
181 # define tolower(c) __tobody (c, tolower, __ctype_tolower, (c))
182 # define toupper(c) __tobody (c, toupper, __ctype_toupper, (c))
183 # endif /* Optimizing gcc */
185 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
186 # define isascii(c) __isascii (c)
187 # define toascii(c) __toascii (c)
189 # define _tolower(c) ((int) __ctype_tolower[(int) (c)])
190 # define _toupper(c) ((int) __ctype_toupper[(int) (c)])
193 #endif /* Not __NO_CTYPE. */
197 /* The concept of one static locale per category is not very well
198 thought out. Many applications will need to process its data using
199 information from several different locales. Another application is
200 the implementation of the internationalization handling in the
201 upcoming ISO C++ standard library. To support this another set of
202 the functions using locale data exist which have an additional
205 Attention: all these functions are *not* standardized in any form.
206 This is a proof-of-concept implementation. */
208 /* Structure for reentrant locale using functions. This is an
209 (almost) opaque type for the user level programs. */
210 # include <xlocale.h>
212 /* These definitions are similar to the ones above but all functions
213 take as an argument a handle for the locale which shall be used. */
214 # define __isctype_l(c, type, locale) \
215 ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)
217 # define __exctype_l(name) extern int name (int, __locale_t) __THROW
219 /* The following names are all functions:
220 int isCHARACTERISTIC(int c, locale_t *locale);
221 which return nonzero iff C has CHARACTERISTIC.
222 For the meaning of the characteristic names, see the `enum' above. */
223 __exctype_l (__isalnum_l
);
224 __exctype_l (__isalpha_l
);
225 __exctype_l (__iscntrl_l
);
226 __exctype_l (__isdigit_l
);
227 __exctype_l (__islower_l
);
228 __exctype_l (__isgraph_l
);
229 __exctype_l (__isprint_l
);
230 __exctype_l (__ispunct_l
);
231 __exctype_l (__isspace_l
);
232 __exctype_l (__isupper_l
);
233 __exctype_l (__isxdigit_l
);
235 __exctype_l (__isblank_l
);
238 /* Return the lowercase version of C in locale L. */
239 extern int __tolower_l (int __c
, __locale_t __l
) __THROW
;
241 /* Return the uppercase version of C. */
242 extern int __toupper_l (int __c
, __locale_t __l
) __THROW
;
244 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
245 # define __tolower_l(c, locale) \
246 __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale))
247 # define __toupper_l(c, locale) \
248 __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale))
249 # endif /* Optimizing gcc */
253 # define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l))
254 # define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l))
255 # define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l))
256 # define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l))
257 # define __islower_l(c,l) __isctype_l((c), _ISlower, (l))
258 # define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l))
259 # define __isprint_l(c,l) __isctype_l((c), _ISprint, (l))
260 # define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l))
261 # define __isspace_l(c,l) __isctype_l((c), _ISspace, (l))
262 # define __isupper_l(c,l) __isctype_l((c), _ISupper, (l))
263 # define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l))
265 # define __isblank_l(c,l) __isctype_l((c), _ISblank, (l))
267 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
268 # define __isascii_l(c,l) __isascii(c)
269 # define __toascii_l(c,l) __toascii(c)
272 # endif /* Not __NO_CTYPE. */
274 #endif /* Use GNU. */