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
