1 /* Copyright (C) 1991,92,93,95,96,97,98,99,2001,2002,2004,2007,2008,2009,2011 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 89 #ifndef __cplusplus 90 # define __isctype(c, type) \ 91 ((*__ctype_b_loc ())[(int) (c)] & (unsigned short int) type) 92 #elif defined __USE_EXTERN_INLINES 93 # define __isctype_f(type) \ 94 __extern_inline int \ 95 is##type (int __c) __THROW \ 96 { \ 97 return (*__ctype_b_loc ())[(int) (__c)] & (unsigned short int) _IS##type; \ 98 } 99 #endif 100 101 #define __isascii(c) (((c) & ~0x7f) == 0) /* If C is a 7 bit value. */ 102 #define __toascii(c) ((c) & 0x7f) /* Mask off high bits. */ 103 104 #define __exctype(name) extern int name (int) __THROW 105 106 __BEGIN_NAMESPACE_STD 107 108 /* The following names are all functions: 109 int isCHARACTERISTIC(int c); 110 which return nonzero iff C has CHARACTERISTIC. 111 For the meaning of the characteristic names, see the `enum' above. */ 112 __exctype (isalnum); 113 __exctype (isalpha); 114 __exctype (iscntrl); 115 __exctype (isdigit); 116 __exctype (islower); 117 __exctype (isgraph); 118 __exctype (isprint); 119 __exctype (ispunct); 120 __exctype (isspace); 121 __exctype (isupper); 122 __exctype (isxdigit); 123 124 125 /* Return the lowercase version of C. */ 126 extern int tolower (int __c) __THROW; 127 128 /* Return the uppercase version of C. */ 129 extern int toupper (int __c) __THROW; 130 131 __END_NAMESPACE_STD 132 133 134 /* ISO C99 introduced one new function. */ 135 #ifdef __USE_ISOC99 136 __BEGIN_NAMESPACE_C99 137 138 __exctype (isblank); 139 140 __END_NAMESPACE_C99 141 #endif 142 143 #ifdef __USE_GNU 144 /* Test C for a set of character classes according to MASK. */ 145 extern int isctype (int __c, int __mask) __THROW; 146 #endif 147 148 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN 149 150 /* Return nonzero iff C is in the ASCII set 151 (i.e., is no more than 7 bits wide). */ 152 extern int isascii (int __c) __THROW; 153 154 /* Return the part of C that is in the ASCII set 155 (i.e., the low-order 7 bits of C). */ 156 extern int toascii (int __c) __THROW; 157 158 /* These are the same as `toupper' and `tolower' except that they do not 159 check the argument for being in the range of a `char'. */ 160 __exctype (_toupper); 161 __exctype (_tolower); 162 #endif /* Use SVID or use misc. */ 163 164 /* This code is needed for the optimized mapping functions. */ 165 #define __tobody(c, f, a, args) \ 166 (__extension__ \ 167 ({ int __res; \ 168 if (sizeof (c) > 1) \ 169 { \ 170 if (__builtin_constant_p (c)) \ 171 { \ 172 int __c = (c); \ 173 __res = __c < -128 || __c > 255 ? __c : (a)[__c]; \ 174 } \ 175 else \ 176 __res = f args; \ 177 } \ 178 else \ 179 __res = (a)[(int) (c)]; \ 180 __res; })) 181 182 #if !defined __NO_CTYPE 183 # ifdef __isctype_f 184 __isctype_f (alnum) 185 __isctype_f (alpha) 186 __isctype_f (cntrl) 187 __isctype_f (digit) 188 __isctype_f (lower) 189 __isctype_f (graph) 190 __isctype_f (print) 191 __isctype_f (punct) 192 __isctype_f (space) 193 __isctype_f (upper) 194 __isctype_f (xdigit) 195 # ifdef __USE_ISOC99 196 __isctype_f (blank) 197 # endif 198 # elif defined __isctype 199 # define isalnum(c) __isctype((c), _ISalnum) 200 # define isalpha(c) __isctype((c), _ISalpha) 201 # define iscntrl(c) __isctype((c), _IScntrl) 202 # define isdigit(c) __isctype((c), _ISdigit) 203 # define islower(c) __isctype((c), _ISlower) 204 # define isgraph(c) __isctype((c), _ISgraph) 205 # define isprint(c) __isctype((c), _ISprint) 206 # define ispunct(c) __isctype((c), _ISpunct) 207 # define isspace(c) __isctype((c), _ISspace) 208 # define isupper(c) __isctype((c), _ISupper) 209 # define isxdigit(c) __isctype((c), _ISxdigit) 210 # ifdef __USE_ISOC99 211 # define isblank(c) __isctype((c), _ISblank) 212 # endif 213 # endif 214 215 # ifdef __USE_EXTERN_INLINES 216 __extern_inline int 217 __NTH (tolower (int __c)) 218 { 219 return __c >= -128 && __c < 256 ? (*__ctype_tolower_loc ())[__c] : __c; 220 } 221 222 __extern_inline int 223 __NTH (toupper (int __c)) 224 { 225 return __c >= -128 && __c < 256 ? (*__ctype_toupper_loc ())[__c] : __c; 226 } 227 # endif 228 229 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus 230 # define tolower(c) __tobody (c, tolower, *__ctype_tolower_loc (), (c)) 231 # define toupper(c) __tobody (c, toupper, *__ctype_toupper_loc (), (c)) 232 # endif /* Optimizing gcc */ 233 234 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN 235 # define isascii(c) __isascii (c) 236 # define toascii(c) __toascii (c) 237 238 # define _tolower(c) ((int) (*__ctype_tolower_loc ())[(int) (c)]) 239 # define _toupper(c) ((int) (*__ctype_toupper_loc ())[(int) (c)]) 240 # endif 241 242 #endif /* Not __NO_CTYPE. */ 243 244 245 #ifdef __USE_XOPEN2K8 246 /* The concept of one static locale per category is not very well 247 thought out. Many applications will need to process its data using 248 information from several different locales. Another application is 249 the implementation of the internationalization handling in the 250 upcoming ISO C++ standard library. To support this another set of 251 the functions using locale data exist which have an additional 252 argument. 253 254 Attention: all these functions are *not* standardized in any form. 255 This is a proof-of-concept implementation. */ 256 257 /* Structure for reentrant locale using functions. This is an 258 (almost) opaque type for the user level programs. */ 259 # include <xlocale.h> 260 261 /* These definitions are similar to the ones above but all functions 262 take as an argument a handle for the locale which shall be used. */ 263 # define __isctype_l(c, type, locale) \ 264 ((locale)->__ctype_b[(int) (c)] & (unsigned short int) type) 265 266 # define __exctype_l(name) \ 267 extern int name (int, __locale_t) __THROW 268 269 /* The following names are all functions: 270 int isCHARACTERISTIC(int c, locale_t *locale); 271 which return nonzero iff C has CHARACTERISTIC. 272 For the meaning of the characteristic names, see the `enum' above. */ 273 __exctype_l (isalnum_l); 274 __exctype_l (isalpha_l); 275 __exctype_l (iscntrl_l); 276 __exctype_l (isdigit_l); 277 __exctype_l (islower_l); 278 __exctype_l (isgraph_l); 279 __exctype_l (isprint_l); 280 __exctype_l (ispunct_l); 281 __exctype_l (isspace_l); 282 __exctype_l (isupper_l); 283 __exctype_l (isxdigit_l); 284 285 __exctype_l (isblank_l); 286 287 288 /* Return the lowercase version of C in locale L. */ 289 extern int __tolower_l (int __c, __locale_t __l) __THROW; 290 extern int tolower_l (int __c, __locale_t __l) __THROW; 291 292 /* Return the uppercase version of C. */ 293 extern int __toupper_l (int __c, __locale_t __l) __THROW; 294 extern int toupper_l (int __c, __locale_t __l) __THROW; 295 296 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus 297 # define __tolower_l(c, locale) \ 298 __tobody (c, __tolower_l, (locale)->__ctype_tolower, (c, locale)) 299 # define __toupper_l(c, locale) \ 300 __tobody (c, __toupper_l, (locale)->__ctype_toupper, (c, locale)) 301 # define tolower_l(c, locale) __tolower_l ((c), (locale)) 302 # define toupper_l(c, locale) __toupper_l ((c), (locale)) 303 # endif /* Optimizing gcc */ 304 305 306 # ifndef __NO_CTYPE 307 # define __isalnum_l(c,l) __isctype_l((c), _ISalnum, (l)) 308 # define __isalpha_l(c,l) __isctype_l((c), _ISalpha, (l)) 309 # define __iscntrl_l(c,l) __isctype_l((c), _IScntrl, (l)) 310 # define __isdigit_l(c,l) __isctype_l((c), _ISdigit, (l)) 311 # define __islower_l(c,l) __isctype_l((c), _ISlower, (l)) 312 # define __isgraph_l(c,l) __isctype_l((c), _ISgraph, (l)) 313 # define __isprint_l(c,l) __isctype_l((c), _ISprint, (l)) 314 # define __ispunct_l(c,l) __isctype_l((c), _ISpunct, (l)) 315 # define __isspace_l(c,l) __isctype_l((c), _ISspace, (l)) 316 # define __isupper_l(c,l) __isctype_l((c), _ISupper, (l)) 317 # define __isxdigit_l(c,l) __isctype_l((c), _ISxdigit, (l)) 318 319 # define __isblank_l(c,l) __isctype_l((c), _ISblank, (l)) 320 321 # if defined __USE_SVID || defined __USE_MISC 322 # define __isascii_l(c,l) ((l), __isascii (c)) 323 # define __toascii_l(c,l) ((l), __toascii (c)) 324 # endif 325 326 # define isalnum_l(c,l) __isalnum_l ((c), (l)) 327 # define isalpha_l(c,l) __isalpha_l ((c), (l)) 328 # define iscntrl_l(c,l) __iscntrl_l ((c), (l)) 329 # define isdigit_l(c,l) __isdigit_l ((c), (l)) 330 # define islower_l(c,l) __islower_l ((c), (l)) 331 # define isgraph_l(c,l) __isgraph_l ((c), (l)) 332 # define isprint_l(c,l) __isprint_l ((c), (l)) 333 # define ispunct_l(c,l) __ispunct_l ((c), (l)) 334 # define isspace_l(c,l) __isspace_l ((c), (l)) 335 # define isupper_l(c,l) __isupper_l ((c), (l)) 336 # define isxdigit_l(c,l) __isxdigit_l ((c), (l)) 337 338 # define isblank_l(c,l) __isblank_l ((c), (l)) 339 340 # if defined __USE_SVID || defined __USE_MISC 341 # define isascii_l(c,l) __isascii_l ((c), (l)) 342 # define toascii_l(c,l) __toascii_l ((c), (l)) 343 # endif 344 345 # endif /* Not __NO_CTYPE. */ 346 347 #endif /* Use POSIX 2008. */ 348 349 __END_DECLS 350 351 #endif /* ctype.h */ 352
