1 /* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
3 Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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)
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.
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. */
19 /* Written by Bruno Haible and Paul Eggert. */
22 * ISO C 99 <wctype.h> for platforms that lack it.
23 * <http://www.opengroup.org/susv3xbd/wctype.h.html>
25 * iswctype, towctrans, towlower, towupper, wctrans, wctype,
26 * wctrans_t, and wctype_t are not yet implemented.
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
35 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
36 included before <wchar.h>. */
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. */
47 # if @HAVE_INCLUDE_NEXT@
48 # include_next <wctype.h>
50 # include @ABSOLUTE_WCTYPE_H@
58 typedef wint_t __wctype_wint_t;
60 typedef int __wctype_wint_t;
63 /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
64 Assume all 12 functions are implemented the same way, or not at all. */
67 /* IRIX 5.3 has macros but no functions, its isw* macros refer to an
68 undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
69 refer to system functions like _iswctype that are not in the
70 standard C library. Rather than try to get ancient buggy
71 implementations like this to work, just disable them. */
86 iswalnum (__wctype_wint_t wc)
88 return ((wc >= '0' && wc <= '9')
89 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
93 iswalpha (__wctype_wint_t wc)
95 return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
99 iswblank (__wctype_wint_t wc)
101 return wc == ' ' || wc == '\t';
105 iswcntrl (__wctype_wint_t wc)
107 return (wc & ~0x1f) == 0 || wc == 0x7f;
111 iswdigit (__wctype_wint_t wc)
113 return wc >= '0' && wc <= '9';
117 iswgraph (__wctype_wint_t wc)
119 return wc >= '!' && wc <= '~';
123 iswlower (__wctype_wint_t wc)
125 return wc >= 'a' && wc <= 'z';
129 iswprint (__wctype_wint_t wc)
131 return wc >= ' ' && wc <= '~';
135 iswpunct (__wctype_wint_t wc)
137 return (wc >= '!' && wc <= '~'
138 && !((wc >= '0' && wc <= '9')
139 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
143 iswspace (__wctype_wint_t wc)
145 return (wc == ' ' || wc == '\t'
146 || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
150 iswupper (__wctype_wint_t wc)
152 return wc >= 'A' && wc <= 'Z';
156 iswxdigit (__wctype_wint_t wc)
158 return ((wc >= '0' && wc <= '9')
159 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
162 # endif /* ! HAVE_ISWCNTRL */
164 #endif /* _GL_WCTYPE_H */
165 #endif /* _GL_WCTYPE_H */