1/* Copyright (C) 1991-2020 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 <https://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 <bits/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 
46enum 
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. */ 
79extern const unsigned short int **__ctype_b_loc (void) 
80 __THROW __attribute__ ((__const__)); 
81extern const __int32_t **__ctype_tolower_loc (void) 
82 __THROW __attribute__ ((__const__)); 
83extern 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. */ 
122extern int tolower (int __c) __THROW; 
123 
124/* Return the uppercase version of C. */ 
125extern 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. */ 
135extern 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). */ 
142extern 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). */ 
146extern 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. */ 
267extern int __tolower_l (int __c, locale_t __l) __THROW; 
268extern int tolower_l (int __c, locale_t __l) __THROW; 
269 
270/* Return the uppercase version of C. */ 
271extern int __toupper_l (int __c, locale_t __l) __THROW; 
272extern 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