1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2001,2002,2004,2007,2008,2009
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 /*
21 * ISO C99 Standard 7.4: Character handling <ctype.h>
22 */
23
24 #ifndef _CTYPE_H
25 #define _CTYPE_H 1
26
27 #include <features.h>
28 #include <bits/types.h>
29
30 __BEGIN_DECLS
31
32 #ifndef _ISbit
33 /* These are all the characteristics of characters.
34 If there get to be more than 16 distinct characteristics,
35 many things must be changed that use `unsigned short int's.
36
37 The characteristics are stored always in network byte order (big
38 endian). We define the bit value interpretations here dependent on the
39 machine's byte order. */
40
41 # include <endian.h>
42 # if __BYTE_ORDER == __BIG_ENDIAN
43 # define _ISbit(bit) (1 << (bit))
44 # else /* __BYTE_ORDER == __LITTLE_ENDIAN */
45 # define _ISbit(bit) ((bit) < 8 ? ((1 << (bit)) << 8) : ((1 << (bit)) >> 8))
46 # endif
47
48 enum
49 {
50 _ISupper = _ISbit (0), /* UPPERCASE. */
51 _ISlower = _ISbit (1), /* lowercase. */
52 _ISalpha = _ISbit (2), /* Alphabetic. */
53 _ISdigit = _ISbit (3), /* Numeric. */
54 _ISxdigit = _ISbit (4), /* Hexadecimal numeric. */
55 _ISspace = _ISbit (5), /* Whitespace. */
56 _ISprint = _ISbit (6), /* Printing. */
57 _ISgraph = _ISbit (7), /* Graphical. */
58 _ISblank = _ISbit (8), /* Blank (usually SPC and TAB). */
59 _IScntrl = _ISbit (9), /* Control character. */
60 _ISpunct = _ISbit (10), /* Punctuation. */
61 _ISalnum = _ISbit (11) /* Alphanumeric. */
62 };
63 #endif /* ! _ISbit */
64
65 /* These are defined in ctype-info.c.
66 The declarations here must match those in localeinfo.h.
67
68 In the thread-specific locale model (see `uselocale' in <locale.h>)
69 we cannot use global variables for these as was done in the past.
70 Instead, the following accessor functions return the address of
71 each variable, which is local to the current thread if multithreaded.
72
73 These point into arrays of 384, so they can be indexed by any `unsigned
74 char' value [0,255]; by EOF (-1); or by any `signed char' value
75 [-128,-1). ISO C requires that the ctype functions work for `unsigned
76 char' values and for EOF; we also support negative `signed char' values
77 for broken old programs. The case conversion arrays are of `int's
78 rather than `unsigned char's because tolower (EOF) must be EOF, which
79 doesn't fit into an `unsigned char'. But today more important is that
80 the arrays are also used for multi-byte character sets. */
81 extern __const unsigned short int **__ctype_b_loc (void)
82 __THROW __attribute__ ((__const));
83 extern __const __int32_t **__ctype_tolower_loc (void)
84 __THROW __attribute__ ((__const));
85 extern __const __int32_t **__ctype_toupper_loc (void)
86 __THROW __attribute__ ((__const));
87
88 #define __isctype(c, type) \
89 ((*__ctype_b_loc ())[(int) (c)] & (unsigned short int) type)
90
91 #define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
92 #define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
93
94 #define __exctype(name) extern int name (int) __THROW
95
96 __BEGIN_NAMESPACE_STD
97
98 /* The following names are all functions:
99 int isCHARACTERISTIC(int c);
100 which return nonzero iff C has CHARACTERISTIC.
101 For the meaning of the characteristic names, see the `enum' above. */
102 __exctype (isalnum);
103 __exctype (isalpha);
104 __exctype (iscntrl);
105 __exctype (isdigit);
106 __exctype (islower);
107 __exctype (isgraph);
108 __exctype (isprint);
109 __exctype (ispunct);
110 __exctype (isspace);
111 __exctype (isupper);
112 __exctype (isxdigit);
113
114
115 /* Return the lowercase version of C. */
116 extern int tolower (int __c) __THROW;
117
118 /* Return the uppercase version of C. */
119 extern int toupper (int __c) __THROW;
120
121 __END_NAMESPACE_STD
122
123
124 /* ISO C99 introduced one new function. */
125 #ifdef __USE_ISOC99
126 __BEGIN_NAMESPACE_C99
127
128 __exctype (isblank);
129
130 __END_NAMESPACE_C99
131 #endif
132
133 #ifdef __USE_GNU
134 /* Test C for a set of character classes according to MASK. */
135 extern int isctype (int __c, int __mask) __THROW;
136 #endif
137
138 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
139
140 /* Return nonzero iff C is in the ASCII set
141 (i.e., is no more than 7 bits wide). */
142 extern int isascii (int __c) __THROW;
143
144 /* Return the part of C that is in the ASCII set
145 (i.e., the low-order 7 bits of C). */
146 extern int toascii (int __c) __THROW;
147
148 /* These are the same as `toupper' and `tolower' except that they do not
149 check the argument for being in the range of a `char'. */
150 __exctype (_toupper);
151 __exctype (_tolower);
152 #endif /* Use SVID or use misc. */
153
154 /* This code is needed for the optimized mapping functions. */
155 #define __tobody(c, f, a, args) \
156 (__extension__ \
157 ({ int __res; \
158 if (sizeof (c) > 1) \
159 { \
160 if (__builtin_constant_p (c)) \
161 { \
162 int __c = (c); \
163 __res = __c < -128 || __c > 255 ? __c : (a)[__c]; \
164 } \
165 else \
166 __res = f args; \
167 } \
168 else \
169 __res = (a)[(int) (c)]; \
170 __res; }))
171
172 #if !defined __NO_CTYPE && !defined __cplusplus
173 # define isalnum(c) __isctype((c), _ISalnum)
174 # define isalpha(c) __isctype((c), _ISalpha)
175 # define iscntrl(c) __isctype((c), _IScntrl)
176 # define isdigit(c) __isctype((c), _ISdigit)
177 # define islower(c) __isctype((c), _ISlower)
178 # define isgraph(c) __isctype((c), _ISgraph)
179 # define isprint(c) __isctype((c), _ISprint)
180 # define ispunct(c) __isctype((c), _ISpunct)
181 # define isspace(c) __isctype((c), _ISspace)
182 # define isupper(c) __isctype((c), _ISupper)
183 # define isxdigit(c) __isctype((c), _ISxdigit)
184
185 # ifdef __USE_ISOC99
186 # define isblank(c) __isctype((c), _ISblank)
187 # endif
188
189 # ifdef __USE_EXTERN_INLINES
190 __extern_inline int
191 __NTH (tolower (int __c))
192 {
193 return __c >= -128 && __c < 256 ? (*__ctype_tolower_loc ())[__c] : __c;
194 }
195
196 __extern_inline int
197 __NTH (toupper (int __c))
198 {
199 return __c >= -128 && __c < 256 ? (*__ctype_toupper_loc ())[__c] : __c;
200 }
201 # endif
202
203 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
204 # define tolower(c) __tobody (c, tolower, *__ctype_tolower_loc (), (c))
205 # define toupper(c) __tobody (c, toupper, *__ctype_toupper_loc (), (c))
206 # endif /* Optimizing gcc */
207
208 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
209 # define isascii(c) __isascii (c)
210 # define toascii(c) __toascii (c)
211
212 # define _tolower(c) ((int) (*__ctype_tolower_loc ())[(int) (c)])
213 # define _toupper(c) ((int) (*__ctype_toupper_loc ())[(int) (c)])
214 # endif
215
216 #endif /* Not __NO_CTYPE. */
217
218
219 #ifdef __USE_XOPEN2K8
220 /* The concept of one static locale per category is not very well
221 thought out. Many applications will need to process its data using
222 information from several different locales. Another application is
223 the implementation of the internationalization handling in the
224 upcoming ISO C++ standard library. To support this another set of
225 the functions using locale data exist which have an additional
226 argument.
227
228 Attention: all these functions are *not* standardized in any form.
229 This is a proof-of-concept implementation. */
230
231 /* Structure for reentrant locale using functions. This is an
232 (almost) opaque type for the user level programs. */
233 # include <xlocale.h>
234
235 /* These definitions are similar to the ones above but all functions
236 take as an argument a handle for the locale which shall be used. */
237 # define __isctype_l(c, type, locale) \
238 ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)
239
240 # define __exctype_l(name) \
241 extern int name (int, __locale_t) __THROW
242
243 /* The following names are all functions:
244 int isCHARACTERISTIC(int c, locale_t *locale);
245 which return nonzero iff C has CHARACTERISTIC.
246 For the meaning of the characteristic names, see the `enum' above. */
247 __exctype_l (isalnum_l);
248 __exctype_l (isalpha_l);
249 __exctype_l (iscntrl_l);
250 __exctype_l (isdigit_l);
251 __exctype_l (islower_l);
252 __exctype_l (isgraph_l);
253 __exctype_l (isprint_l);
254 __exctype_l (ispunct_l);
255 __exctype_l (isspace_l);
256 __exctype_l (isupper_l);
257 __exctype_l (isxdigit_l);
258
259 __exctype_l (isblank_l);
260
261
262 /* Return the lowercase version of C in locale L. */
263 extern int __tolower_l (int __c, __locale_t __l) __THROW;
264 extern int tolower_l (int __c, __locale_t __l) __THROW;
265
266 /* Return the uppercase version of C. */
267 extern int __toupper_l (int __c, __locale_t __l) __THROW;
268 extern int toupper_l (int __c, __locale_t __l) __THROW;
269
270 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
271 # define __tolower_l(c, locale) \
272 __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale))
273 # define __toupper_l(c, locale) \
274 __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale))
275 # define tolower_l(c, locale) __tolower_l ((c), (locale))
276 # define toupper_l(c, locale) __toupper_l ((c), (locale))
277 # endif /* Optimizing gcc */
278
279
280 # ifndef __NO_CTYPE
281 # define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l))
282 # define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l))
283 # define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l))
284 # define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l))
285 # define __islower_l(c,l) __isctype_l((c), _ISlower, (l))
286 # define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l))
287 # define __isprint_l(c,l) __isctype_l((c), _ISprint, (l))
288 # define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l))
289 # define __isspace_l(c,l) __isctype_l((c), _ISspace, (l))
290 # define __isupper_l(c,l) __isctype_l((c), _ISupper, (l))
291 # define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l))
292
293 # define __isblank_l(c,l) __isctype_l((c), _ISblank, (l))
294
295 # if defined __USE_SVID || defined __USE_MISC
296 # define __isascii_l(c,l) ((l), __isascii (c))
297 # define __toascii_l(c,l) ((l), __toascii (c))
298 # endif
299
300 # define isalnum_l(c,l) __isalnum_l ((c), (l))
301 # define isalpha_l(c,l) __isalpha_l ((c), (l))
302 # define iscntrl_l(c,l) __iscntrl_l ((c), (l))
303 # define isdigit_l(c,l) __isdigit_l ((c), (l))
304 # define islower_l(c,l) __islower_l ((c), (l))
305 # define isgraph_l(c,l) __isgraph_l ((c), (l))
306 # define isprint_l(c,l) __isprint_l ((c), (l))
307 # define ispunct_l(c,l) __ispunct_l ((c), (l))
308 # define isspace_l(c,l) __isspace_l ((c), (l))
309 # define isupper_l(c,l) __isupper_l ((c), (l))
310 # define isxdigit_l(c,l) __isxdigit_l ((c), (l))
311
312 # define isblank_l(c,l) __isblank_l ((c), (l))
313
314 # if defined __USE_SVID || defined __USE_MISC
315 # define isascii_l(c,l) __isascii_l ((c), (l))
316 # define toascii_l(c,l) __toascii_l ((c), (l))
317 # endif
318
319 # endif /* Not __NO_CTYPE. */
320
321 #endif /* Use POSIX 2008. */
322
323 __END_DECLS
324
325 #endif /* ctype.h */
326