include/ctype.h

   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.
   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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /*
  20  *      ISO C99 Standard 7.4: Character handling        <ctype.h>
  21  */
  22
  23 #ifndef _CTYPE_H
  24 #define _CTYPE_H        1
  25
  26 #include <features.h>
  27 #include <bits/types.h>
  28
  29 __BEGIN_DECLS
  30 __BEGIN_NAMESPACE_STD
  31
  32 /* The following names are all functions:
  33      int isCHARACTERISTIC(int c);
  34    which return nonzero iff C has CHARACTERISTIC.
  35    For the meaning of the characteristic names, see the `enum' above.  */
  36 extern int isalnum(int __c) __THROW;
  37 libc_hidden_proto(isalnum)
  38 extern int isalpha(int __c) __THROW;
  39 libc_hidden_proto(isalpha)
  40 extern int iscntrl(int __c) __THROW;
  41 libc_hidden_proto(iscntrl)
  42 extern int isdigit(int __c) __THROW;
  43 libc_hidden_proto(isdigit)
  44 extern int islower(int __c) __THROW;
  45 libc_hidden_proto(islower)
  46 extern int isgraph(int __c) __THROW;
  47 libc_hidden_proto(isgraph)
  48 extern int isprint(int __c) __THROW;
  49 libc_hidden_proto(isprint)
  50 extern int ispunct(int __c) __THROW;
  51 libc_hidden_proto(ispunct)
  52 extern int isspace(int __c) __THROW;
  53 libc_hidden_proto(isspace)
  54 extern int isupper(int __c) __THROW;
  55 libc_hidden_proto(isupper)
  56 extern int isxdigit(int __c) __THROW;
  57 libc_hidden_proto(isxdigit)
  58
  59
  60 /* Return the lowercase version of C.  */
  61 extern int tolower(int __c) __THROW;
  62 libc_hidden_proto(tolower)
  63
  64 /* Return the uppercase version of C.  */
  65 extern int toupper(int __c) __THROW;
  66 libc_hidden_proto(toupper)
  67
  68 #if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) && \
  69         defined __UCLIBC_SUSV4_LEGACY__
  70 /* Return nonzero iff C is in the ASCII set
  71    (i.e., is no more than 7 bits wide).  */
  72 extern int isascii(int __c) __THROW;
  73 libc_hidden_proto(isascii)
  74 /* Return the part of C that is in the ASCII set
  75    (i.e., the low-order 7 bits of C).  */
  76 extern int toascii(int __c) __THROW;
  77 #endif
  78
  79 __END_NAMESPACE_STD
  80
  81
  82 /* ISO C99 introduced one new function.  */
  83 #ifdef  __USE_ISOC99
  84 __BEGIN_NAMESPACE_C99
  85
  86 extern int isblank(int __c) __THROW;
  87 libc_hidden_proto(isblank)
  88
  89 __END_NAMESPACE_C99
  90 #endif
  91 __END_DECLS
  92
  93 #ifndef __UCLIBC_HAS_CTYPE_TABLES__
  94
  95 /* "Stub locale": we are permanently in C/POSIX locale.
  96  * Using simple(r) ctype.h machinery in this header instead: */
  97 #include <bits/uClibc_ctype.h>
  98
  99 #else
 100
 101 __BEGIN_DECLS
 102
 103 #ifndef _ISbit
 104 /* These are all the characteristics of characters.
 105    If there get to be more than 16 distinct characteristics,
 106    __ctype_mask_t will need to be adjusted. */
 107
 108 /* libstdc++ from gcc toolchain needs this macro. */
 109 # define _ISbit(bit)    (1 << (bit))
 110
 111 enum
 112 {
 113   _ISupper = _ISbit (0),        /* UPPERCASE.  */
 114   _ISlower = _ISbit (1),        /* lowercase.  */
 115   _ISalpha = _ISbit (2),        /* Alphabetic.  */
 116   _ISdigit = _ISbit (3),        /* Numeric.  */
 117   _ISxdigit = _ISbit (4),       /* Hexadecimal numeric.  */
 118   _ISspace = _ISbit (5),        /* Whitespace.  */
 119   _ISprint = _ISbit (6),        /* Printing.  */
 120   _ISgraph = _ISbit (7),        /* Graphical.  */
 121   _ISblank = _ISbit (8),        /* Blank (usually SPC and TAB).  */
 122   _IScntrl = _ISbit (9),        /* Control character.  */
 123   _ISpunct = _ISbit (10),       /* Punctuation.  */
 124   _ISalnum = _ISbit (11)        /* Alphanumeric.  */
 125 };
 126 #else
 127 #error _ISbit already defined!
 128 #endif /* ! _ISbit  */
 129
 130 /* __ctype_XXX_t types and __UCLIBC_CTYPE_x_TBL_OFFSET constants */
 131 #include <bits/uClibc_touplow.h>
 132
 133 #ifdef __UCLIBC_HAS_CTYPE_SIGNED__
 134 # define __UCLIBC_CTYPE_IN_TO_DOMAIN(c) (((unsigned int)((c) + 128)) < 384)
 135 #else
 136 # define __UCLIBC_CTYPE_IN_TO_DOMAIN(c) (((unsigned int)(c)) < 256)
 137 #endif
 138
 139 /* In the thread-specific locale model (see `uselocale' in <locale.h>)
 140    we cannot use global variables for these as was done in the past.
 141    Instead, the following accessor functions return the address of
 142    each variable, which is local to the current thread if multithreaded.
 143
 144    These point into arrays of 384, so they can be indexed by any `unsigned
 145    char' value [0,255]; by EOF (-1); or by any `signed char' value
 146    [-128,-1).  ISO C requires that the ctype functions work for `unsigned
 147    char' values and for EOF; we also support negative `signed char' values
 148    for broken old programs.  The case conversion arrays are of `int's
 149    rather than `unsigned char's because tolower (EOF) must be EOF, which
 150    doesn't fit into an `unsigned char'.  But today more important is that
 151    the arrays are also used for multi-byte character sets.  */
 152
 153 /* uClibc differences:
 154  *
 155  * When __UCLIBC_HAS_CTYPE_SIGNED is defined,
 156  *
 157  *    The upper and lower mapping arrays are type int16_t, so that
 158  *    they may store all char values plus EOF.  The glibc reasoning
 159  *    given above for these being type int is questionable, as the
 160  *    ctype mapping functions map from the set of (unsigned) char
 161  *    and EOF back into the set.  They have no awareness of multi-byte
 162  *    or wide characters.
 163  *
 164  * Otherwise,
 165  *
 166  *    The ctype array is defined for -1..255.
 167  *    The upper and lower mapping arrays are defined for 0..255.
 168  *    The upper and lower mapping arrays are type unsigned char.
 169  */
 170
 171 /* Pointers to the default C-locale data. */
 172 extern const __ctype_mask_t *__C_ctype_b;
 173 libc_hidden_proto(__C_ctype_b)
 174 extern const __ctype_touplow_t *__C_ctype_toupper;
 175 libc_hidden_proto(__C_ctype_toupper)
 176 extern const __ctype_touplow_t *__C_ctype_tolower;
 177 libc_hidden_proto(__C_ctype_tolower)
 178
 179 #ifdef __UCLIBC_HAS_XLOCALE__
 180
 181 const __ctype_mask_t **__ctype_b_loc(void) __attribute__ ((const));
 182 libc_hidden_proto(__ctype_b_loc)
 183 const __ctype_touplow_t **__ctype_tolower_loc(void) __attribute__ ((const));
 184 libc_hidden_proto(__ctype_tolower_loc)
 185 const __ctype_touplow_t **__ctype_toupper_loc(void) __attribute__ ((const));
 186 libc_hidden_proto(__ctype_toupper_loc)
 187 #define __UCLIBC_CTYPE_B        (*__ctype_b_loc())
 188 #define __UCLIBC_CTYPE_TOLOWER  (*__ctype_tolower_loc())
 189 #define __UCLIBC_CTYPE_TOUPPER  (*__ctype_toupper_loc())
 190
 191 #else  /* __UCLIBC_HAS_XLOCALE__ */
 192
 193 /* Pointers to the current global locale data in use. */
 194 extern const __ctype_mask_t *__ctype_b;
 195 libc_hidden_proto(__ctype_b)
 196 extern const __ctype_touplow_t *__ctype_toupper;
 197 libc_hidden_proto(__ctype_toupper)
 198 extern const __ctype_touplow_t *__ctype_tolower;
 199 libc_hidden_proto(__ctype_tolower)
 200 #define __UCLIBC_CTYPE_B        (__ctype_b)
 201 #define __UCLIBC_CTYPE_TOLOWER  (__ctype_tolower)
 202 #define __UCLIBC_CTYPE_TOUPPER  (__ctype_toupper)
 203
 204 #endif /* __UCLIBC_HAS_XLOCALE__ */
 205
 206 #ifdef __UCLIBC_SUSV4_LEGACY__
 207 #define __isascii(c)    (((c) & ~0x7f) == 0)    /* If C is a 7 bit value.  */
 208 #define __toascii(c)    ((c) & 0x7f)            /* Mask off high bits.  */
 209 #endif
 210
 211 #ifdef _LIBC
 212 /* These are uClibc-specific. */
 213 #define __isdigit_char(C)    (((unsigned char)((C) - '0')) <= 9)
 214 #define __isdigit_int(C)     (((unsigned int)((C) - '0')) <= 9)
 215 #endif
 216
 217 #ifdef __USE_GNU
 218 /* Test C for a set of character classes according to MASK.  */
 219 extern int isctype(int __c, int __mask) __THROW;
 220 #endif
 221
 222 #if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) \
 223         && defined __UCLIBC_SUSV4_LEGACY__
 224 /* These are the same as `toupper' and `tolower' except that they do not
 225    check the argument for being in the range of a `char'.  */
 226 extern int _toupper(int __c) __THROW;
 227 extern int _tolower(int __c) __THROW;
 228 #endif /* Use SVID or use misc.  */
 229
 230 /* This code is needed for the optimized mapping functions.  */
 231 #define __tobody(c, f, table, args) \
 232 (__extension__ ({ \
 233         int __res; \
 234         if (sizeof(c) > 1) { \
 235                 if (__builtin_constant_p(c)) { \
 236                         int __c = (c); \
 237                         __res = __UCLIBC_CTYPE_IN_TO_DOMAIN(__c) ? (table)[__c] : __c; \
 238                 } else \
 239                         __res = f args; \
 240         } else \
 241                 __res = (table)[(int) (c)]; \
 242         __res; \
 243 }))
 244
 245 #define __isctype(c, type) ((__UCLIBC_CTYPE_B)[(int)(c)] & (__ctype_mask_t)type)
 246 /* Do not combine in one #if - unifdef tool is not that clever */
 247 #ifndef __NO_CTYPE
 248 #ifndef __cplusplus
 249 # define isalnum(c)     __isctype((c), _ISalnum)
 250 # define isalpha(c)     __isctype((c), _ISalpha)
 251 # define iscntrl(c)     __isctype((c), _IScntrl)
 252 # define isdigit(c)     __isctype((c), _ISdigit)
 253 # define islower(c)     __isctype((c), _ISlower)
 254 # define isgraph(c)     __isctype((c), _ISgraph)
 255 # define isprint(c)     __isctype((c), _ISprint)
 256 # define ispunct(c)     __isctype((c), _ISpunct)
 257 # define isspace(c)     __isctype((c), _ISspace)
 258 # define isupper(c)     __isctype((c), _ISupper)
 259 # define isxdigit(c)    __isctype((c), _ISxdigit)
 260 # ifdef __USE_ISOC99
 261 #  define isblank(c)    __isctype((c), _ISblank)
 262 # endif
 263
 264 # ifdef __USE_EXTERN_INLINES
 265 __extern_inline int
 266 __NTH (tolower (int __c))
 267 {
 268   return __UCLIBC_CTYPE_IN_TO_DOMAIN(__c) ? (__UCLIBC_CTYPE_TOLOWER)[__c] : __c;
 269 }
 270 __extern_inline int
 271 __NTH (toupper (int __c))
 272 {
 273   return __UCLIBC_CTYPE_IN_TO_DOMAIN(__c) ? (__UCLIBC_CTYPE_TOUPPER)[__c] : __c;
 274 }
 275 # endif
 276
 277 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
 278 #  define tolower(c)    __tobody(c, tolower, __UCLIBC_CTYPE_TOLOWER, (c))
 279 #  define toupper(c)    __tobody(c, toupper, __UCLIBC_CTYPE_TOUPPER, (c))
 280 # endif /* Optimizing gcc */
 281
 282 # if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) \
 283         && defined __UCLIBC_SUSV4_LEGACY__
 284 #  define isascii(c)    __isascii (c)
 285 #  define toascii(c)    __toascii (c)
 286 #  define _tolower(c)   ((int) (__UCLIBC_CTYPE_TOLOWER)[(int) (c)])
 287 #  define _toupper(c)   ((int) (__UCLIBC_CTYPE_TOUPPER)[(int) (c)])
 288 # endif
 289
 290 #endif /* not __cplusplus */
 291 #endif /* not __NO_CTYPE */
 292
 293
 294 #if defined __USE_GNU && defined __UCLIBC_HAS_XLOCALE__
 295 /* The concept of one static locale per category is not very well
 296    thought out.  Many applications will need to process its data using
 297    information from several different locales.  Another application is
 298    the implementation of the internationalization handling in the
 299    upcoming ISO C++ standard library.  To support this another set of
 300    the functions using locale data exist which have an additional
 301    argument.
 302
 303    Attention: all these functions are *not* standardized in any form.
 304    This is a proof-of-concept implementation.  */
 305
 306 /* Structure for reentrant locale using functions.  This is an
 307    (almost) opaque type for the user level programs.  */
 308 # include <xlocale.h>
 309
 310 /* These definitions are similar to the ones above but all functions
 311    take as an argument a handle for the locale which shall be used.  */
 312 extern int isalnum_l(int, __locale_t) __THROW;
 313 libc_hidden_proto(isalnum_l)
 314 extern int isalpha_l(int, __locale_t) __THROW;
 315 libc_hidden_proto(isalpha_l)
 316 extern int iscntrl_l(int, __locale_t) __THROW;
 317 libc_hidden_proto(iscntrl_l)
 318 extern int isdigit_l(int, __locale_t) __THROW;
 319 libc_hidden_proto(isdigit_l)
 320 extern int islower_l(int, __locale_t) __THROW;
 321 libc_hidden_proto(islower_l)
 322 extern int isgraph_l(int, __locale_t) __THROW;
 323 libc_hidden_proto(isgraph_l)
 324 extern int isprint_l(int, __locale_t) __THROW;
 325 libc_hidden_proto(isprint_l)
 326 extern int ispunct_l(int, __locale_t) __THROW;
 327 libc_hidden_proto(ispunct_l)
 328 extern int isspace_l(int, __locale_t) __THROW;
 329 libc_hidden_proto(isspace_l)
 330 extern int isupper_l(int, __locale_t) __THROW;
 331 libc_hidden_proto(isupper_l)
 332 extern int isxdigit_l(int, __locale_t) __THROW;
 333 libc_hidden_proto(isxdigit_l)
 334 extern int isblank_l(int, __locale_t) __THROW;
 335 libc_hidden_proto(isblank_l)
 336
 337 # if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) \
 338         && defined __UCLIBC_SUSV4_LEGACY__
 339 /* Return nonzero iff C is in the ASCII set
 340    (i.e., is no more than 7 bits wide).  */
 341 extern int isascii_l (int __c) __THROW;
 342 libc_hidden_proto(isascii_l)
 343
 344 # endif
 345
 346 /* Return the lowercase version of C in locale L.  */
 347 extern int tolower_l (int __c, __locale_t __l) __THROW;
 348 libc_hidden_proto(tolower_l)
 349
 350 /* Return the uppercase version of C.  */
 351 extern int toupper_l (int __c, __locale_t __l) __THROW;
 352
 353 # if __GNUC__ >= 2 && defined __OPTIMIZE__ && !defined __cplusplus
 354 #  define tolower_l(c, locale) __tobody(c, tolower_l, (locale)->__ctype_tolower, (c, locale))
 355 #  define toupper_l(c, locale) __tobody(c, toupper_l, (locale)->__ctype_toupper, (c, locale))
 356 # endif /* Optimizing gcc */
 357
 358
 359 # define __isctype_l(c, type, locale) ((locale)->__ctype_b[(int) (c)] & (__ctype_mask_t) type)
 360 # ifndef __NO_CTYPE
 361 #  define __isalnum_l(c,l)      __isctype_l((c), _ISalnum, (l))
 362 #  define __isalpha_l(c,l)      __isctype_l((c), _ISalpha, (l))
 363 #  define __iscntrl_l(c,l)      __isctype_l((c), _IScntrl, (l))
 364 #  define __isdigit_l(c,l)      __isctype_l((c), _ISdigit, (l))
 365 #  define __islower_l(c,l)      __isctype_l((c), _ISlower, (l))
 366 #  define __isgraph_l(c,l)      __isctype_l((c), _ISgraph, (l))
 367 #  define __isprint_l(c,l)      __isctype_l((c), _ISprint, (l))
 368 #  define __ispunct_l(c,l)      __isctype_l((c), _ISpunct, (l))
 369 #  define __isspace_l(c,l)      __isctype_l((c), _ISspace, (l))
 370 #  define __isupper_l(c,l)      __isctype_l((c), _ISupper, (l))
 371 #  define __isxdigit_l(c,l)     __isctype_l((c), _ISxdigit, (l))
 372 #  define __isblank_l(c,l)      __isctype_l((c), _ISblank, (l))
 373
 374 #  if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) \
 375         && defined __UCLIBC_SUSV4_LEGACY__
 376 #   define __isascii_l(c,l)     ((l), __isascii (c))
 377 #   define __toascii_l(c,l)     ((l), __toascii (c))
 378 #  endif
 379
 380 #  define isalnum_l(c,l)        __isalnum_l ((c), (l))
 381 #  define isalpha_l(c,l)        __isalpha_l ((c), (l))
 382 #  define iscntrl_l(c,l)        __iscntrl_l ((c), (l))
 383 #  define isdigit_l(c,l)        __isdigit_l ((c), (l))
 384 #  define islower_l(c,l)        __islower_l ((c), (l))
 385 #  define isgraph_l(c,l)        __isgraph_l ((c), (l))
 386 #  define isprint_l(c,l)        __isprint_l ((c), (l))
 387 #  define ispunct_l(c,l)        __ispunct_l ((c), (l))
 388 #  define isspace_l(c,l)        __isspace_l ((c), (l))
 389 #  define isupper_l(c,l)        __isupper_l ((c), (l))
 390 #  define isxdigit_l(c,l)       __isxdigit_l ((c), (l))
 391 #  define isblank_l(c,l)        __isblank_l ((c), (l))
 392
 393 #  if (defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN) \
 394         && defined __UCLIBC_SUSV4_LEGACY__
 395 #   define isascii_l(c,l)       __isascii_l ((c), (l))
 396 #   define toascii_l(c,l)       __toascii_l ((c), (l))
 397 #  endif
 398
 399 # endif /* Not __NO_CTYPE.  */
 400
 401 #endif /* Use GNU.  */
 402
 403 __END_DECLS
 404
 405 #endif /* __UCLIBC_HAS_CTYPE_TABLES__ */
 406
 407 #if defined _LIBC && !defined __UCLIBC_SUSV4_LEGACY__
 408 /* We define {__,}isascii for internal use only */
 409 # define __isascii(c) (((c) & ~0x7f) == 0)
 410 # define isascii(c) __isascii (c)
 411 #endif
 412
 413 #endif /* ctype.h  */