gl/wctype.in.h

   1 /* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
   2
   3    Copyright (C) 2006, 2007 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Bruno Haible and Paul Eggert.  */
  20
  21 /*
  22  * ISO C 99 <wctype.h> for platforms that lack it.
  23  * <http://www.opengroup.org/susv3xbd/wctype.h.html>
  24  *
  25  * iswctype, towctrans, towlower, towupper, wctrans, wctype,
  26  * wctrans_t, and wctype_t are not yet implemented.
  27  */
  28
  29 #ifndef _GL_WCTYPE_H
  30
  31 #if @HAVE_WINT_T@
  32 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.
  33    Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
  34    <wchar.h>.
  35    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
  36    included before <wchar.h>.  */
  37 # include <stddef.h>
  38 # include <stdio.h>
  39 # include <time.h>
  40 # include <wchar.h>
  41 #endif
  42
  43 /* Include the original <wctype.h> if it exists.
  44    BeOS 5 has the functions but no <wctype.h>.  */
  45 /* The include_next requires a split double-inclusion guard.  */
  46 #if @HAVE_WCTYPE_H@
  47 # @INCLUDE_NEXT@ @NEXT_WCTYPE_H@
  48 #endif
  49
  50 #ifndef _GL_WCTYPE_H
  51 #define _GL_WCTYPE_H
  52
  53 #if @HAVE_WINT_T@
  54 typedef wint_t __wctype_wint_t;
  55 #else
  56 typedef int __wctype_wint_t;
  57 #endif
  58
  59 /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
  60    Assume all 12 functions are implemented the same way, or not at all.  */
  61 #if ! @HAVE_ISWCNTRL@
  62
  63 /* IRIX 5.3 has macros but no functions, its isw* macros refer to an
  64    undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
  65    refer to system functions like _iswctype that are not in the
  66    standard C library.  Rather than try to get ancient buggy
  67    implementations like this to work, just disable them.  */
  68 #  undef iswalnum
  69 #  undef iswalpha
  70 #  undef iswblank
  71 #  undef iswcntrl
  72 #  undef iswdigit
  73 #  undef iswgraph
  74 #  undef iswlower
  75 #  undef iswprint
  76 #  undef iswpunct
  77 #  undef iswspace
  78 #  undef iswupper
  79 #  undef iswxdigit
  80
  81 static inline int
  82 iswalnum (__wctype_wint_t wc)
  83 {
  84   return ((wc >= '0' && wc <= '9')
  85           || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
  86 }
  87
  88 static inline int
  89 iswalpha (__wctype_wint_t wc)
  90 {
  91   return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
  92 }
  93
  94 static inline int
  95 iswblank (__wctype_wint_t wc)
  96 {
  97   return wc == ' ' || wc == '\t';
  98 }
  99
 100 static inline int
 101 iswcntrl (__wctype_wint_t wc)
 102 {
 103   return (wc & ~0x1f) == 0 || wc == 0x7f;
 104 }
 105
 106 static inline int
 107 iswdigit (__wctype_wint_t wc)
 108 {
 109   return wc >= '0' && wc <= '9';
 110 }
 111
 112 static inline int
 113 iswgraph (__wctype_wint_t wc)
 114 {
 115   return wc >= '!' && wc <= '~';
 116 }
 117
 118 static inline int
 119 iswlower (__wctype_wint_t wc)
 120 {
 121   return wc >= 'a' && wc <= 'z';
 122 }
 123
 124 static inline int
 125 iswprint (__wctype_wint_t wc)
 126 {
 127   return wc >= ' ' && wc <= '~';
 128 }
 129
 130 static inline int
 131 iswpunct (__wctype_wint_t wc)
 132 {
 133   return (wc >= '!' && wc <= '~'
 134           && !((wc >= '0' && wc <= '9')
 135                || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
 136 }
 137
 138 static inline int
 139 iswspace (__wctype_wint_t wc)
 140 {
 141   return (wc == ' ' || wc == '\t'
 142           || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
 143 }
 144
 145 static inline int
 146 iswupper (__wctype_wint_t wc)
 147 {
 148   return wc >= 'A' && wc <= 'Z';
 149 }
 150
 151 static inline int
 152 iswxdigit (__wctype_wint_t wc)
 153 {
 154   return ((wc >= '0' && wc <= '9')
 155           || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
 156 }
 157
 158 # endif /* ! HAVE_ISWCNTRL */
 159
 160 #endif /* _GL_WCTYPE_H */
 161 #endif /* _GL_WCTYPE_H */