gl/wctype_.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 2, 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 #define _GL_WCTYPE_H
  31
  32 #if @HAVE_WINT_T@
  33 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.
  34    Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
  35    <wchar.h>.
  36    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
  37    included before <wchar.h>.  */
  38 # include <stddef.h>
  39 # include <stdio.h>
  40 # include <time.h>
  41 # include <wchar.h>
  42 typedef wint_t __wctype_wint_t;
  43 #else
  44 typedef int __wctype_wint_t;
  45 #endif
  46
  47 /* Include the original <wctype.h> if it exists.
  48    BeOS 5 has the functions but no <wctype.h>.  */
  49 #if @HAVE_WCTYPE_H@
  50 # include @ABSOLUTE_WCTYPE_H@
  51 #endif
  52
  53 /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
  54    Assume all 12 functions are implemented the same way, or not at all.  */
  55 #if ! HAVE_ISWCNTRL
  56
  57 /* IRIX 5.3 has macros but no functions, its isw* macros refer to an
  58    undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
  59    refer to system functions like _iswctype that are not in the
  60    standard C library.  Rather than try to get ancient buggy
  61    implementations like this to work, just disable them.  */
  62 #  undef iswalnum
  63 #  undef iswalpha
  64 #  undef iswblank
  65 #  undef iswcntrl
  66 #  undef iswdigit
  67 #  undef iswgraph
  68 #  undef iswlower
  69 #  undef iswprint
  70 #  undef iswpunct
  71 #  undef iswspace
  72 #  undef iswupper
  73 #  undef iswxdigit
  74
  75 static inline int
  76 iswalnum (__wctype_wint_t wc)
  77 {
  78   return ((wc >= '0' && wc <= '9')
  79           || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
  80 }
  81
  82 static inline int
  83 iswalpha (__wctype_wint_t wc)
  84 {
  85   return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
  86 }
  87
  88 static inline int
  89 iswblank (__wctype_wint_t wc)
  90 {
  91   return wc == ' ' || wc == '\t';
  92 }
  93
  94 static inline int
  95 iswcntrl (__wctype_wint_t wc)
  96 {
  97   return (wc & ~0x1f) == 0 || wc == 0x7f;
  98 }
  99
 100 static inline int
 101 iswdigit (__wctype_wint_t wc)
 102 {
 103   return wc >= '0' && wc <= '9';
 104 }
 105
 106 static inline int
 107 iswgraph (__wctype_wint_t wc)
 108 {
 109   return wc >= '!' && wc <= '~';
 110 }
 111
 112 static inline int
 113 iswlower (__wctype_wint_t wc)
 114 {
 115   return wc >= 'a' && wc <= 'z';
 116 }
 117
 118 static inline int
 119 iswprint (__wctype_wint_t wc)
 120 {
 121   return wc >= ' ' && wc <= '~';
 122 }
 123
 124 static inline int
 125 iswpunct (__wctype_wint_t wc)
 126 {
 127   return (wc >= '!' && wc <= '~'
 128           && !((wc >= '0' && wc <= '9')
 129                || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
 130 }
 131
 132 static inline int
 133 iswspace (__wctype_wint_t wc)
 134 {
 135   return (wc == ' ' || wc == '\t'
 136           || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
 137 }
 138
 139 static inline int
 140 iswupper (__wctype_wint_t wc)
 141 {
 142   return wc >= 'A' && wc <= 'Z';
 143 }
 144
 145 static inline int
 146 iswxdigit (__wctype_wint_t wc)
 147 {
 148   return ((wc >= '0' && wc <= '9')
 149           || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
 150 }
 151
 152 # endif /* ! HAVE_ISWCNTRL */
 153
 154 #endif /* _GL_WCTYPE_H */