1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2001,02
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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
21 * ISO C99 Standard 7.4: Character handling <ctype.h>
28 #include <bits/types.h>
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.
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. */
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))
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. */
65 /* These are defined in ctype-info.c.
66 The declarations here must match those in localeinfo.h.
68 These point into arrays of 384, so they can be indexed by any `unsigned
69 char' value [0,255]; by EOF (-1); or by any `signed char' value
70 [-128,-1). ISO C requires that the ctype functions work for `unsigned
71 char' values and for EOF; we also support negative `signed char' values
72 for broken old programs. The case conversion arrays are of `int's
73 rather than `unsigned char's because tolower (EOF) must be EOF, which
74 doesn't fit into an `unsigned char'. But today more important is that
75 the arrays are also used for multi-byte character sets. */
76 extern __const unsigned short int *__ctype_b; /* Characteristics. */
77 extern __const __int32_t *__ctype_tolower; /* Case conversions. */
78 extern __const __int32_t *__ctype_toupper; /* Case conversions. */
80 #define __isctype(c, type) \
81 (__ctype_b[(int) (c)] & (unsigned short int) type)
83 #define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */
84 #define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */
86 #define __exctype(name) extern int name (int) __THROW
90 /* The following names are all functions:
91 int isCHARACTERISTIC(int c);
92 which return nonzero iff C has CHARACTERISTIC.
93 For the meaning of the characteristic names, see the `enum' above. */
104 __exctype (isxdigit);
107 /* Return the lowercase version of C. */
108 extern int tolower (int __c) __THROW;
110 /* Return the uppercase version of C. */
111 extern int toupper (int __c) __THROW;
116 /* ISO C99 introduced one new function. */
118 __BEGIN_NAMESPACE_C99
126 /* Test C for a set of character classes according to MASK. */
127 extern int isctype (int __c, int __mask) __THROW;
130 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
132 /* Return nonzero iff C is in the ASCII set
133 (i.e., is no more than 7 bits wide). */
134 extern int isascii (int __c) __THROW;
136 /* Return the part of C that is in the ASCII set
137 (i.e., the low-order 7 bits of C). */
138 extern int toascii (int __c) __THROW;
140 /* These are the same as `toupper' and `tolower' except that they do not
141 check the argument for being in the range of a `char'. */
142 __exctype (_toupper);
143 __exctype (_tolower);
144 #endif /* Use SVID or use misc. */
146 /* This code is needed for the optimized mapping functions. */
147 #define __tobody(c, f, a, args) \
150 if (sizeof (c) > 1) \
152 if (__builtin_constant_p (c)) \
155 __res = __c < -128 || __c > 255 ? __c : (a)[__c]; \
161 __res = (a)[(int) (c)]; \
164 #if !defined __NO_CTYPE && !defined __cplusplus
165 # define isalnum(c) __isctype((c), _ISalnum)
166 # define isalpha(c) __isctype((c), _ISalpha)
167 # define iscntrl(c) __isctype((c), _IScntrl)
168 # define isdigit(c) __isctype((c), _ISdigit)
169 # define islower(c) __isctype((c), _ISlower)
170 # define isgraph(c) __isctype((c), _ISgraph)
171 # define isprint(c) __isctype((c), _ISprint)
172 # define ispunct(c) __isctype((c), _ISpunct)
173 # define isspace(c) __isctype((c), _ISspace)
174 # define isupper(c) __isctype((c), _ISupper)
175 # define isxdigit(c) __isctype((c), _ISxdigit)
178 # define isblank(c) __isctype((c), _ISblank)
181 # ifdef __USE_EXTERN_INLINES
183 tolower (int __c) __THROW
185 return __c >= -128 && __c < 256 ? __ctype_tolower[__c] : __c;
189 toupper (int __c) __THROW
191 return __c >= -128 && __c < 256 ? __ctype_toupper[__c] : __c;
195 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
196 # define tolower(c) __tobody (c, tolower, __ctype_tolower, (c))
197 # define toupper(c) __tobody (c, toupper, __ctype_toupper, (c))
198 # endif /* Optimizing gcc */
200 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
201 # define isascii(c) __isascii (c)
202 # define toascii(c) __toascii (c)
204 # define _tolower(c) ((int) __ctype_tolower[(int) (c)])
205 # define _toupper(c) ((int) __ctype_toupper[(int) (c)])
208 #endif /* Not __NO_CTYPE. */
212 /* The concept of one static locale per category is not very well
213 thought out. Many applications will need to process its data using
214 information from several different locales. Another application is
215 the implementation of the internationalization handling in the
216 upcoming ISO C++ standard library. To support this another set of
217 the functions using locale data exist which have an additional
220 Attention: all these functions are *not* standardized in any form.
221 This is a proof-of-concept implementation. */
223 /* Structure for reentrant locale using functions. This is an
224 (almost) opaque type for the user level programs. */
225 # include <xlocale.h>
227 /* These definitions are similar to the ones above but all functions
228 take as an argument a handle for the locale which shall be used. */
229 # define __isctype_l(c, type, locale) \
230 ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type)
232 # define __exctype_l(name) \
233 extern int name (int, __locale_t) __THROW
235 /* The following names are all functions:
236 int isCHARACTERISTIC(int c, locale_t *locale);
237 which return nonzero iff C has CHARACTERISTIC.
238 For the meaning of the characteristic names, see the `enum' above. */
239 __exctype_l (isalnum_l);
240 __exctype_l (isalpha_l);
241 __exctype_l (iscntrl_l);
242 __exctype_l (isdigit_l);
243 __exctype_l (islower_l);
244 __exctype_l (isgraph_l);
245 __exctype_l (isprint_l);
246 __exctype_l (ispunct_l);
247 __exctype_l (isspace_l);
248 __exctype_l (isupper_l);
249 __exctype_l (isxdigit_l);
251 __exctype_l (isblank_l);
254 /* Return the lowercase version of C in locale L. */
255 extern int __tolower_l (int __c, __locale_t __l) __THROW;
256 extern int tolower_l (int __c, __locale_t __l) __THROW;
258 /* Return the uppercase version of C. */
259 extern int __toupper_l (int __c, __locale_t __l) __THROW;
260 extern int toupper_l (int __c, __locale_t __l) __THROW;
262 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
263 # define __tolower_l(c, locale) \
264 __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale))
265 # define __toupper_l(c, locale) \
266 __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale))
267 # define tolower_l(c, locale) __tolower_l ((c), (locale))
268 # define toupper_l(c, locale) __toupper_l ((c), (locale))
269 # endif /* Optimizing gcc */
273 # define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l))
274 # define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l))
275 # define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l))
276 # define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l))
277 # define __islower_l(c,l) __isctype_l((c), _ISlower, (l))
278 # define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l))
279 # define __isprint_l(c,l) __isctype_l((c), _ISprint, (l))
280 # define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l))
281 # define __isspace_l(c,l) __isctype_l((c), _ISspace, (l))
282 # define __isupper_l(c,l) __isctype_l((c), _ISupper, (l))
283 # define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l))
285 # define __isblank_l(c,l) __isctype_l((c), _ISblank, (l))
287 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
288 # define __isascii_l(c,l) ((l), __isascii (c))
289 # define __toascii_l(c,l) ((l), __toascii (c))
292 # define isalnum_l(c,l) __isalnum_l ((c), (l))
293 # define isalpha_l(c,l) __isalpha_l ((c), (l))
294 # define iscntrl_l(c,l) __iscntrl_l ((c), (l))
295 # define isdigit_l(c,l) __isdigit_l ((c), (l))
296 # define islower_l(c,l) __islower_l ((c), (l))
297 # define isgraph_l(c,l) __isgraph_l ((c), (l))
298 # define isprint_l(c,l) __isprint_l ((c), (l))
299 # define ispunct_l(c,l) __ispunct_l ((c), (l))
300 # define isspace_l(c,l) __isspace_l ((c), (l))
301 # define isupper_l(c,l) __isupper_l ((c), (l))
302 # define isxdigit_l(c,l) __isxdigit_l ((c), (l))
304 # define isblank_l(c,l) __isblank_l ((c), (l))
306 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN
307 # define isascii_l(c,l) __isascii_l ((c), (l))
308 # define toascii_l(c,l) __toascii_l ((c), (l))
311 # endif /* Not __NO_CTYPE. */
313 #endif /* Use GNU. */