1 /* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
3 Copyright (C) 2006-2010 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 @PRAGMA_SYSTEM_HEADER@
36 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.
37 Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
39 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
40 included before <wchar.h>. */
47 /* Include the original <wctype.h> if it exists.
48 BeOS 5 has the functions but no <wctype.h>. */
49 /* The include_next requires a split double-inclusion guard. */
51 # @INCLUDE_NEXT@ @NEXT_WCTYPE_H@
57 /* Define wint_t. (Also done in wchar.in.h.) */
58 #if !@HAVE_WINT_T@ && !defined wint_t
69 /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
70 Linux libc5 has <wctype.h> and the functions but they are broken.
71 Assume all 12 functions are implemented the same way, or not at all. */
72 #if ! @HAVE_ISWCNTRL@ || @REPLACE_ISWCNTRL@
74 /* IRIX 5.3 has macros but no functions, its isw* macros refer to an
75 undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
76 refer to system functions like _iswctype that are not in the
77 standard C library. Rather than try to get ancient buggy
78 implementations like this to work, just disable them. */
94 /* Linux libc5 has <wctype.h> and the functions but they are broken. */
95 # if @REPLACE_ISWCNTRL@
96 # define iswalnum rpl_iswalnum
97 # define iswalpha rpl_iswalpha
98 # define iswblank rpl_iswblank
99 # define iswcntrl rpl_iswcntrl
100 # define iswdigit rpl_iswdigit
101 # define iswgraph rpl_iswgraph
102 # define iswlower rpl_iswlower
103 # define iswprint rpl_iswprint
104 # define iswpunct rpl_iswpunct
105 # define iswspace rpl_iswspace
106 # define iswupper rpl_iswupper
107 # define iswxdigit rpl_iswxdigit
108 # define towlower rpl_towlower
109 # define towupper rpl_towupper
115 return ((wc >= '0' && wc <= '9')
116 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
122 return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
128 return wc == ' ' || wc == '\t';
134 return (wc & ~0x1f) == 0 || wc == 0x7f;
140 return wc >= '0' && wc <= '9';
146 return wc >= '!' && wc <= '~';
152 return wc >= 'a' && wc <= 'z';
158 return wc >= ' ' && wc <= '~';
164 return (wc >= '!' && wc <= '~'
165 && !((wc >= '0' && wc <= '9')
166 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
172 return (wc == ' ' || wc == '\t'
173 || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
179 return wc >= 'A' && wc <= 'Z';
183 iswxdigit (wint_t wc)
185 return ((wc >= '0' && wc <= '9')
186 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
192 return (wc >= 'A' && wc <= 'Z' ? wc - 'A' + 'a' : wc);
198 return (wc >= 'a' && wc <= 'z' ? wc - 'a' + 'A' : wc);
201 # endif /* ! HAVE_ISWCNTRL */
203 # if defined __MINGW32__
205 /* On native Windows, wchar_t is uint16_t, and wint_t is uint32_t.
206 The functions towlower and towupper are implemented in the MSVCRT library
207 to take a wchar_t argument and return a wchar_t result. mingw declares
208 these functions to take a wint_t argument and return a wint_t result.
210 1. When the user passes an argument outside the range 0x0000..0xFFFF, the
211 function will look only at the lower 16 bits. This is allowed according
213 2. The return value is returned in the lower 16 bits of the result register.
214 The upper 16 bits are random: whatever happened to be in that part of the
215 result register. We need to fix this by adding a zero-extend from
216 wchar_t to wint_t after the call. */
219 rpl_towlower (wint_t wc)
221 return (wint_t) (wchar_t) towlower (wc);
223 # define towlower rpl_towlower
226 rpl_towupper (wint_t wc)
228 return (wint_t) (wchar_t) towupper (wc);
230 # define towupper rpl_towupper
238 #endif /* _GL_WCTYPE_H */
239 #endif /* _GL_WCTYPE_H */