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
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      ISO/IEC 9899:1990/Amendment 1:1995 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
  30 __BEGIN_DECLS
  31
  32 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  33    there.  So define it ourselves if it remains undefined.  */
  34 #define __need_wint_t
  35 #include <stddef.h>
  36 #ifndef _WINT_T
  37 /* Integral type unchanged by default argument promotions that can
  38    hold any value corresponding to members of the extended character
  39    set, as well as at least one value that does not correspond to any
  40    member of the extended character set.  */
  41 #define _WINT_T
  42 typedef unsigned int wint_t;
  43 #endif
  44
  45 /* Scalar type that can hold values which represent locale-specific
  46    character mappings.  */
  47 typedef const unsigned int *wctrans_t;
  48
  49 /* Scalar type that can hold values which represent locale-specific
  50    character classifications.  */
  51 typedef unsigned long int wctype_t;
  52
  53 /* Constant expression of type `wint_t' whose value does not correspond
  54    to any member of the extended character set.  */
  55 #ifndef WEOF
  56 #define WEOF (0xffffffffu)
  57 #endif
  58
  59 #ifndef _ISbit
  60 /* These are all the characteristics of characters.
  61    If there get to be more than 16 distinct characteristics,
  62    many things must be changed that use `unsigned short int's.
  63
  64    The characteristics are stored always in network byte order (big
  65    endian).  We define the bit value interpretations here dependent on the
  66    machine's byte order.  */
  67
  68 #include <endian.h>
  69 #if __BYTE_ORDER == __BIG_ENDIAN
  70 #define _ISbit(bit)     (1 << bit)
  71 #else /* __BYTE_ORDER == __LITTLE_ENDIAN */
  72 #define _ISbit(bit)     (bit < 8 ? ((1 << bit) << 8) : ((1 << bit) >> 8))
  73 #endif
  74
  75 enum
  76 {
  77   _ISupper = _ISbit (0),        /* UPPERCASE.  */
  78   _ISlower = _ISbit (1),        /* lowercase.  */
  79   _ISalpha = _ISbit (2),        /* Alphabetic.  */
  80   _ISdigit = _ISbit (3),        /* Numeric.  */
  81   _ISxdigit = _ISbit (4),       /* Hexadecimal numeric.  */
  82   _ISspace = _ISbit (5),        /* Whitespace.  */
  83   _ISprint = _ISbit (6),        /* Printing.  */
  84   _ISgraph = _ISbit (7),        /* Graphical.  */
  85   _ISblank = _ISbit (8),        /* Blank (usually SPC and TAB).  */
  86   _IScntrl = _ISbit (9),        /* Control character.  */
  87   _ISpunct = _ISbit (10),       /* Punctuation.  */
  88   _ISalnum = _ISbit (11)        /* Alphanumeric.  */
  89 };
  90 #endif /* Not _ISbit  */
  91
  92
  93 /*
  94  * Wide-character classification functions: 7.15.2.1.
  95  */
  96
  97 /* Test for any wide character for which `iswalpha' or `iswdigit' is
  98    true.  */
  99 int iswalnum __P ((wint_t __wc));
 100
 101 /* Test for any wide character for which `iswupper' or 'iswlower' is
 102    true, or any wide character that is one of a locale-specific set of
 103    wide-characters for which none of `iswcntrl', `iswdigit',
 104    `iswpunct', or `iswspace' is true.  */
 105 int iswalpha __P ((wint_t __wc));
 106
 107 /* Test for any control wide character.  */
 108 int iswcntrl __P ((wint_t __wc));
 109
 110 /* Test for any wide character that corresponds to a decimal-digit
 111    character.  */
 112 int iswdigit __P ((wint_t __wc));
 113
 114 /* Test for any wide character for which `iswprint' is true and
 115    `iswspace' is false.  */
 116 int iswgraph __P ((wint_t __wc));
 117
 118 /* Test for any wide character that corresponds to a lowercase letter
 119    or is one of a locale-specific set of wide characters for which
 120    none of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
 121 int iswlower __P ((wint_t __wc));
 122
 123 /* Test for any printing wide character.  */
 124 int iswprint __P ((wint_t __wc));
 125
 126 /* Test for any printing wide character that is one of a
 127    locale-specific et of wide characters for which neither `iswspace'
 128    nor `iswalnum' is true.  */
 129 int iswpunct __P ((wint_t __wc));
 130
 131 /* Test for any wide character that corresponds to a locale-specific
 132    set of wide characters for which none of `iswalnum', `iswgraph', or
 133    `iswpunct' is true.  */
 134 int iswspace __P ((wint_t __wc));
 135
 136 /* Test for any wide character that corresponds to an uppercase letter
 137    or is one of a locale-specific set of wide character for which none
 138    of `iswcntrl', `iswdigit', `iswpunct', or `iswspace' is true.  */
 139 int iswupper __P ((wint_t __wc));
 140
 141 /* Test for any wide character that corresponds to a hexadecimal-digit
 142    character equivalent to that performed be the functions described
 143    in the previous subclause.  */
 144 int iswxdigit __P ((wint_t __wc));
 145
 146 /*
 147  * Extensible wide-character classification functions: 7.15.2.2.
 148  */
 149
 150 /* Construct value that describes a class of wide characters identified
 151    by the string argument PROPERTY.  */
 152 wctype_t wctype __P ((__const char *__property));
 153
 154 /* Determine whether the wide-character WC has the property described by
 155    DESC.  */
 156 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 wint_t towlower __P ((wint_t __wc));
 165
 166 /* Converts an lowercase letter to the corresponding uppercase letter.  */
 167 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 wctrans_t wctrans __P ((__const char *__property));
 176
 177 /* Map the wide character WC using the mapping described by DESC.  */
 178 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  */