wctype/wctype.h

   1 /* Copyright (C) 1996 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      ISO C Standard, Amendment 1, 7.15:
  21  *      Wide-character classification and mapping utilities  <wctype.h>
  22  */
  23
  24 #ifndef _WCTYPE_H
  25
  26 #define _WCTYPE_H       1
  27 #include <features.h>
  28
  29 __BEGIN_DECLS
  30
  31 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  32    there.  So define it ourselves if it remains undefined.  */
  33 #define __need_wint_t
  34 #include <stddef.h>
  35 #ifndef _WINT_T
  36 /* Integral type unchanged by default argument promotions that can
  37    hold any value corresponding to members of the extended character
  38    set, as well as at least one value that does not correspond to any
  39    member of the extended character set.  */
  40 #define _WINT_T
  41 typedef unsigned int wint_t;
  42 #endif
  43
  44 /* Scalar type that can hold values which represent locale-specific
  45    character mappings.  */
  46 typedef __const unsigned int *wctrans_t;
  47
  48 /* Scalar type that can hold values which represent locale-specific
  49    character classifications.  */
  50 typedef unsigned long int wctype_t;
  51
  52 /* Constant expression of type `wint_t' whose value does not correspond
  53    to any member of the extended character set.  */
  54 #ifndef WEOF
  55 #define WEOF (0xffffffffu)
  56 #endif
  57
  58 #ifndef _ISbit
  59 /* These are all the characteristics of characters.
  60    If there get to be more than 16 distinct characteristics,
  61    many things must be changed that use `unsigned short int's.
  62
  63    The characteristics are stored always in network byte order (big
  64    endian).  We define the bit value interpretations here dependent on the
  65    machine's byte order.  */
  66
  67 #include <endian.h>
  68 #if __BYTE_ORDER == __BIG_ENDIAN
  69 #define _ISbit(bit)     (1 << bit)
  70 #else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  71 #define _ISbit(bit)     (bit < 8 ? ((1 << bit) << 8) : ((1 << bit) >> 8))
  72 #endif
  73
  74 enum
  75 {
  76   _ISupper = _ISbit (0),        /* UPPERCASE.  */
  77   _ISlower = _ISbit (1),        /* lowercase.  */
  78   _ISalpha = _ISbit (2),        /* Alphabetic.  */
  79   _ISdigit = _ISbit (3),        /* Numeric.  */
  80   _ISxdigit = _ISbit (4),       /* Hexadecimal numeric.  */
  81   _ISspace = _ISbit (5),        /* Whitespace.  */
  82   _ISprint = _ISbit (6),        /* Printing.  */
  83   _ISgraph = _ISbit (7),        /* Graphical.  */
  84   _ISblank = _ISbit (8),        /* Blank (usually SPC and TAB).  */
  85   _IScntrl = _ISbit (9),        /* Control character.  */
  86   _ISpunct = _ISbit (10),       /* Punctuation.  */
  87   _ISalnum = _ISbit (11)        /* Alphanumeric.  */
  88 };
  89 #endif /* Not _ISbit  */
  90
  91
  92 /*
  93  * Wide-character classification functions: 7.15.2.1.
  94  */
  95
  96 /* Test for any wide character for which `iswalpha' or `iswdigit' is
  97    true.  */
  98 extern int iswalnum __P ((wint_t __wc));
  99
 100 /* Test for any wide character for which `iswupper' or 'iswlower' is
 101    true, or any wide character that is one of a locale-specific set of
 102    wide-characters for which none of `iswcntrl', `iswdigit',
 103    `iswpunct', or `iswspace' is true.  */
 104 extern int iswalpha __P ((wint_t __wc));
 105
 106 /* Test for any control wide character.  */
 107 extern int iswcntrl __P ((wint_t __wc));
 108
 109 /* Test for any wide character that corresponds to a decimal-digit
 110    character.  */
 111 extern int iswdigit __P ((wint_t __wc));
 112
 113 /* Test for any wide character for which `iswprint' is true and
 114    `iswspace' is false.  */
 115 extern int iswgraph __P ((wint_t __wc));
 116
 117 /* Test for any wide character that corresponds to a lowercase letter
 118    or is one of a locale-specific set of wide characters for which
 119    none of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
 120 extern int iswlower __P ((wint_t __wc));
 121
 122 /* Test for any printing wide character.  */
 123 extern int iswprint __P ((wint_t __wc));
 124
 125 /* Test for any printing wide character that is one of a
 126    locale-specific et of wide characters for which neither `iswspace'
 127    nor `iswalnum' is true.  */
 128 extern int iswpunct __P ((wint_t __wc));
 129
 130 /* Test for any wide character that corresponds to a locale-specific
 131    set of wide characters for which none of `iswalnum', `iswgraph', or
 132    `iswpunct' is true.  */
 133 extern int iswspace __P ((wint_t __wc));
 134
 135 /* Test for any wide character that corresponds to an uppercase letter
 136    or is one of a locale-specific set of wide character for which none
 137    of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
 138 extern int iswupper __P ((wint_t __wc));
 139
 140 /* Test for any wide character that corresponds to a hexadecimal-digit
 141    character equivalent to that performed be the functions described
 142    in the previous subclause.  */
 143 extern int iswxdigit __P ((wint_t __wc));
 144
 145 /*
 146  * Extensible wide-character classification functions: 7.15.2.2.
 147  */
 148
 149 /* Construct value that describes a class of wide characters identified
 150    by the string argument PROPERTY.  */
 151 extern wctype_t wctype __P ((__const char *__property));
 152
 153 /* Determine whether the wide-character WC has the property described by
 154    DESC.  */
 155 extern int __iswctype __P ((wint_t __wc, wctype_t __desc));
 156 extern int iswctype __P ((wint_t __wc, wctype_t __desc));
 157
 158
 159 /*
 160  * Wide-character case-mapping functions: 7.15.3.1.
 161  */
 162
 163 /* Converts an uppercase letter to the corresponding lowercase letter.  */
 164 extern wint_t towlower __P ((wint_t __wc));
 165
 166 /* Converts an lowercase letter to the corresponding uppercase letter.  */
 167 extern wint_t towupper __P ((wint_t __wc));
 168
 169 /*
 170  * Extensible wide-character mapping functions: 7.15.3.2.
 171  */
 172
 173 /* Construct value that describes a mapping between wide characters
 174    identified by the string argument PROPERTY.  */
 175 extern wctrans_t wctrans __P ((__const char *__property));
 176
 177 /* Map the wide character WC using the mapping described by DESC.  */
 178 extern wint_t towctrans __P ((wint_t __wc, wctrans_t __desc));
 179
 180
 181
 182 #ifndef __NO_WCTYPE
 183 #define iswalnum(wc)    __iswctype ((wc), _ISalnum)
 184 #define iswalpha(wc)    __iswctype ((wc), _ISalpha)
 185 #define iswcntrl(wc)    __iswctype ((wc), _IScntrl)
 186 #define iswdigit(wc)    __iswctype ((wc), _ISdigit)
 187 #define iswlower(wc)    __iswctype ((wc), _ISlower)
 188 #define iswgraph(wc)    __iswctype ((wc), _ISgraph)
 189 #define iswprint(wc)    __iswctype ((wc), _ISprint)
 190 #define iswpunct(wc)    __iswctype ((wc), _ISpunct)
 191 #define iswspace(wc)    __iswctype ((wc), _ISspace)
 192 #define iswupper(wc)    __iswctype ((wc), _ISupper)
 193 #define iswxdigit(wc)   __iswctype ((wc), _ISxdigit)
 194
 195 #ifdef  __USE_GNU
 196 #define iswblank(wc)    __iswctype ((wc), _ISblank)
 197 #endif
 198
 199 /* Pointer to conversion tables.  */
 200 extern __const int *__ctype_tolower; /* Case conversions.  */
 201 extern __const int *__ctype_toupper; /* Case conversions.  */
 202
 203 #define towlower(wc)    towctrans (wc, __ctype_tolower)
 204 #define towupper(wc)    towctrans (wc, __ctype_toupper)
 205
 206 #endif /* Not __NO_WCTYPE.  */
 207
 208 __END_DECLS
 209
 210 #endif /* wctype.h  */