1 | /* Copyright (C) 1991-2019 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
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 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ |
17 | |
18 | /* |
19 | * ISO C99 Standard 7.4: Character handling <ctype.h> |
20 | */ |
21 | |
22 | #ifndef _CTYPE_H |
23 | #define _CTYPE_H 1 |
24 | |
25 | #include <features.h> |
26 | #include <bits/types.h> |
27 | |
28 | __BEGIN_DECLS |
29 | |
30 | #ifndef _ISbit |
31 | /* These are all the characteristics of characters. |
32 | If there get to be more than 16 distinct characteristics, |
33 | many things must be changed that use `unsigned short int's. |
34 | |
35 | The characteristics are stored always in network byte order (big |
36 | endian). We define the bit value interpretations here dependent on the |
37 | machine's byte order. */ |
38 | |
39 | # include <endian.h> |
40 | # if __BYTE_ORDER == __BIG_ENDIAN |
41 | # define _ISbit(bit) (1 << (bit)) |
42 | # else /* __BYTE_ORDER == __LITTLE_ENDIAN */ |
43 | # define _ISbit(bit) ((bit) < 8 ? ((1 << (bit)) << 8) : ((1 << (bit)) >> 8)) |
44 | # endif |
45 | |
46 | enum |
47 | { |
48 | _ISupper = _ISbit (0), /* UPPERCASE. */ |
49 | _ISlower = _ISbit (1), /* lowercase. */ |
50 | _ISalpha = _ISbit (2), /* Alphabetic. */ |
51 | _ISdigit = _ISbit (3), /* Numeric. */ |
52 | _ISxdigit = _ISbit (4), /* Hexadecimal numeric. */ |
53 | _ISspace = _ISbit (5), /* Whitespace. */ |
54 | _ISprint = _ISbit (6), /* Printing. */ |
55 | _ISgraph = _ISbit (7), /* Graphical. */ |
56 | _ISblank = _ISbit (8), /* Blank (usually SPC and TAB). */ |
57 | _IScntrl = _ISbit (9), /* Control character. */ |
58 | _ISpunct = _ISbit (10), /* Punctuation. */ |
59 | _ISalnum = _ISbit (11) /* Alphanumeric. */ |
60 | }; |
61 | #endif /* ! _ISbit */ |
62 | |
63 | /* These are defined in ctype-info.c. |
64 | The declarations here must match those in localeinfo.h. |
65 | |
66 | In the thread-specific locale model (see `uselocale' in <locale.h>) |
67 | we cannot use global variables for these as was done in the past. |
68 | Instead, the following accessor functions return the address of |
69 | each variable, which is local to the current thread if multithreaded. |
70 | |
71 | These point into arrays of 384, so they can be indexed by any `unsigned |
72 | char' value [0,255]; by EOF (-1); or by any `signed char' value |
73 | [-128,-1). ISO C requires that the ctype functions work for `unsigned |
74 | char' values and for EOF; we also support negative `signed char' values |
75 | for broken old programs. The case conversion arrays are of `int's |
76 | rather than `unsigned char's because tolower (EOF) must be EOF, which |
77 | doesn't fit into an `unsigned char'. But today more important is that |
78 | the arrays are also used for multi-byte character sets. */ |
79 | extern const unsigned short int **__ctype_b_loc (void) |
80 | __THROW __attribute__ ((__const__)); |
81 | extern const __int32_t **__ctype_tolower_loc (void) |
82 | __THROW __attribute__ ((__const__)); |
83 | extern const __int32_t **__ctype_toupper_loc (void) |
84 | __THROW __attribute__ ((__const__)); |
85 | |
86 | |
87 | #ifndef __cplusplus |
88 | # define __isctype(c, type) \ |
89 | ((*__ctype_b_loc ())[(int) (c)] & (unsigned short int) type) |
90 | #elif defined __USE_EXTERN_INLINES |
91 | # define __isctype_f(type) \ |
92 | __extern_inline int \ |
93 | is##type (int __c) __THROW \ |
94 | { \ |
95 | return (*__ctype_b_loc ())[(int) (__c)] & (unsigned short int) _IS##type; \ |
96 | } |
97 | #endif |
98 | |
99 | #define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */ |
100 | #define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */ |
101 | |
102 | #define __exctype(name) extern int name (int) __THROW |
103 | |
104 | /* The following names are all functions: |
105 | int isCHARACTERISTIC(int c); |
106 | which return nonzero iff C has CHARACTERISTIC. |
107 | For the meaning of the characteristic names, see the `enum' above. */ |
108 | __exctype (isalnum); |
109 | __exctype (isalpha); |
110 | __exctype (iscntrl); |
111 | __exctype (isdigit); |
112 | __exctype (islower); |
113 | __exctype (isgraph); |
114 | __exctype (isprint); |
115 | __exctype (ispunct); |
116 | __exctype (isspace); |
117 | __exctype (isupper); |
118 | __exctype (isxdigit); |
119 | |
120 | |
121 | /* Return the lowercase version of C. */ |
122 | extern int tolower (int __c) __THROW; |
123 | |
124 | /* Return the uppercase version of C. */ |
125 | extern int toupper (int __c) __THROW; |
126 | |
127 | |
128 | /* ISO C99 introduced one new function. */ |
129 | #ifdef __USE_ISOC99 |
130 | __exctype (isblank); |
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_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 X/Open 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 |
173 | # ifdef __isctype_f |
174 | __isctype_f (alnum) |
175 | __isctype_f (alpha) |
176 | __isctype_f (cntrl) |
177 | __isctype_f (digit) |
178 | __isctype_f (lower) |
179 | __isctype_f (graph) |
180 | __isctype_f (print) |
181 | __isctype_f (punct) |
182 | __isctype_f (space) |
183 | __isctype_f (upper) |
184 | __isctype_f (xdigit) |
185 | # ifdef __USE_ISOC99 |
186 | __isctype_f (blank) |
187 | # endif |
188 | # elif defined __isctype |
189 | # define isalnum(c) __isctype((c), _ISalnum) |
190 | # define isalpha(c) __isctype((c), _ISalpha) |
191 | # define iscntrl(c) __isctype((c), _IScntrl) |
192 | # define isdigit(c) __isctype((c), _ISdigit) |
193 | # define islower(c) __isctype((c), _ISlower) |
194 | # define isgraph(c) __isctype((c), _ISgraph) |
195 | # define isprint(c) __isctype((c), _ISprint) |
196 | # define ispunct(c) __isctype((c), _ISpunct) |
197 | # define isspace(c) __isctype((c), _ISspace) |
198 | # define isupper(c) __isctype((c), _ISupper) |
199 | # define isxdigit(c) __isctype((c), _ISxdigit) |
200 | # ifdef __USE_ISOC99 |
201 | # define isblank(c) __isctype((c), _ISblank) |
202 | # endif |
203 | # endif |
204 | |
205 | # ifdef __USE_EXTERN_INLINES |
206 | __extern_inline int |
207 | __NTH (tolower (int __c)) |
208 | { |
209 | return __c >= -128 && __c < 256 ? (*__ctype_tolower_loc ())[__c] : __c; |
210 | } |
211 | |
212 | __extern_inline int |
213 | __NTH (toupper (int __c)) |
214 | { |
215 | return __c >= -128 && __c < 256 ? (*__ctype_toupper_loc ())[__c] : __c; |
216 | } |
217 | # endif |
218 | |
219 | # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus |
220 | # define tolower(c) __tobody (c, tolower, *__ctype_tolower_loc (), (c)) |
221 | # define toupper(c) __tobody (c, toupper, *__ctype_toupper_loc (), (c)) |
222 | # endif /* Optimizing gcc */ |
223 | |
224 | # if defined __USE_MISC || defined __USE_XOPEN |
225 | # define isascii(c) __isascii (c) |
226 | # define toascii(c) __toascii (c) |
227 | |
228 | # define _tolower(c) ((int) (*__ctype_tolower_loc ())[(int) (c)]) |
229 | # define _toupper(c) ((int) (*__ctype_toupper_loc ())[(int) (c)]) |
230 | # endif |
231 | |
232 | #endif /* Not __NO_CTYPE. */ |
233 | |
234 | |
235 | #ifdef __USE_XOPEN2K8 |
236 | /* POSIX.1-2008 extended locale interface (see locale.h). */ |
237 | # include <bits/types/locale_t.h> |
238 | |
239 | /* These definitions are similar to the ones above but all functions |
240 | take as an argument a handle for the locale which shall be used. */ |
241 | # define __isctype_l(c, type, locale) \ |
242 | ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type) |
243 | |
244 | # define __exctype_l(name) \ |
245 | extern int name (int, locale_t) __THROW |
246 | |
247 | /* The following names are all functions: |
248 | int isCHARACTERISTIC(int c, locale_t *locale); |
249 | which return nonzero iff C has CHARACTERISTIC. |
250 | For the meaning of the characteristic names, see the `enum' above. */ |
251 | __exctype_l (isalnum_l); |
252 | __exctype_l (isalpha_l); |
253 | __exctype_l (iscntrl_l); |
254 | __exctype_l (isdigit_l); |
255 | __exctype_l (islower_l); |
256 | __exctype_l (isgraph_l); |
257 | __exctype_l (isprint_l); |
258 | __exctype_l (ispunct_l); |
259 | __exctype_l (isspace_l); |
260 | __exctype_l (isupper_l); |
261 | __exctype_l (isxdigit_l); |
262 | |
263 | __exctype_l (isblank_l); |
264 | |
265 | |
266 | /* Return the lowercase version of C in locale L. */ |
267 | extern int __tolower_l (int __c, locale_t __l) __THROW; |
268 | extern int tolower_l (int __c, locale_t __l) __THROW; |
269 | |
270 | /* Return the uppercase version of C. */ |
271 | extern int __toupper_l (int __c, locale_t __l) __THROW; |
272 | extern int toupper_l (int __c, locale_t __l) __THROW; |
273 | |
274 | # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus |
275 | # define __tolower_l(c, locale) \ |
276 | __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale)) |
277 | # define __toupper_l(c, locale) \ |
278 | __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale)) |
279 | # define tolower_l(c, locale) __tolower_l ((c), (locale)) |
280 | # define toupper_l(c, locale) __toupper_l ((c), (locale)) |
281 | # endif /* Optimizing gcc */ |
282 | |
283 | |
284 | # ifndef __NO_CTYPE |
285 | # define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l)) |
286 | # define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l)) |
287 | # define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l)) |
288 | # define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l)) |
289 | # define __islower_l(c,l) __isctype_l((c), _ISlower, (l)) |
290 | # define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l)) |
291 | # define __isprint_l(c,l) __isctype_l((c), _ISprint, (l)) |
292 | # define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l)) |
293 | # define __isspace_l(c,l) __isctype_l((c), _ISspace, (l)) |
294 | # define __isupper_l(c,l) __isctype_l((c), _ISupper, (l)) |
295 | # define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l)) |
296 | |
297 | # define __isblank_l(c,l) __isctype_l((c), _ISblank, (l)) |
298 | |
299 | # ifdef __USE_MISC |
300 | # define __isascii_l(c,l) ((l), __isascii (c)) |
301 | # define __toascii_l(c,l) ((l), __toascii (c)) |
302 | # endif |
303 | |
304 | # define isalnum_l(c,l) __isalnum_l ((c), (l)) |
305 | # define isalpha_l(c,l) __isalpha_l ((c), (l)) |
306 | # define iscntrl_l(c,l) __iscntrl_l ((c), (l)) |
307 | # define isdigit_l(c,l) __isdigit_l ((c), (l)) |
308 | # define islower_l(c,l) __islower_l ((c), (l)) |
309 | # define isgraph_l(c,l) __isgraph_l ((c), (l)) |
310 | # define isprint_l(c,l) __isprint_l ((c), (l)) |
311 | # define ispunct_l(c,l) __ispunct_l ((c), (l)) |
312 | # define isspace_l(c,l) __isspace_l ((c), (l)) |
313 | # define isupper_l(c,l) __isupper_l ((c), (l)) |
314 | # define isxdigit_l(c,l) __isxdigit_l ((c), (l)) |
315 | |
316 | # define isblank_l(c,l) __isblank_l ((c), (l)) |
317 | |
318 | # ifdef __USE_MISC |
319 | # define isascii_l(c,l) __isascii_l ((c), (l)) |
320 | # define toascii_l(c,l) __toascii_l ((c), (l)) |
321 | # endif |
322 | |
323 | # endif /* Not __NO_CTYPE. */ |
324 | |
325 | #endif /* Use POSIX 2008. */ |
326 | |
327 | __END_DECLS |
328 | |
329 | #endif /* ctype.h */ |
330 | |