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
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# if @HAVE_INCLUDE_NEXT@
48#  include_next <wctype.h>
49# else
50#  include @ABSOLUTE_WCTYPE_H@
51# endif
52#endif
53
54#ifndef _GL_WCTYPE_H
55#define _GL_WCTYPE_H
56
57#if @HAVE_WINT_T@
58typedef wint_t __wctype_wint_t;
59#else
60typedef int __wctype_wint_t;
61#endif
62
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.  */
65#if ! @HAVE_ISWCNTRL@
66
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.  */
72#  undef iswalnum
73#  undef iswalpha
74#  undef iswblank
75#  undef iswcntrl
76#  undef iswdigit
77#  undef iswgraph
78#  undef iswlower
79#  undef iswprint
80#  undef iswpunct
81#  undef iswspace
82#  undef iswupper
83#  undef iswxdigit
84
85static inline int
86iswalnum (__wctype_wint_t wc)
87{
88  return ((wc >= '0' && wc <= '9')
89	  || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
90}
91
92static inline int
93iswalpha (__wctype_wint_t wc)
94{
95  return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
96}
97
98static inline int
99iswblank (__wctype_wint_t wc)
100{
101  return wc == ' ' || wc == '\t';
102}
103
104static inline int
105iswcntrl (__wctype_wint_t wc)
106{
107  return (wc & ~0x1f) == 0 || wc == 0x7f;
108}
109
110static inline int
111iswdigit (__wctype_wint_t wc)
112{
113  return wc >= '0' && wc <= '9';
114}
115
116static inline int
117iswgraph (__wctype_wint_t wc)
118{
119  return wc >= '!' && wc <= '~';
120}
121
122static inline int
123iswlower (__wctype_wint_t wc)
124{
125  return wc >= 'a' && wc <= 'z';
126}
127
128static inline int
129iswprint (__wctype_wint_t wc)
130{
131  return wc >= ' ' && wc <= '~';
132}
133
134static inline int
135iswpunct (__wctype_wint_t wc)
136{
137  return (wc >= '!' && wc <= '~'
138	  && !((wc >= '0' && wc <= '9')
139	       || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
140}
141
142static inline int
143iswspace (__wctype_wint_t wc)
144{
145  return (wc == ' ' || wc == '\t'
146	  || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
147}
148
149static inline int
150iswupper (__wctype_wint_t wc)
151{
152  return wc >= 'A' && wc <= 'Z';
153}
154
155static inline int
156iswxdigit (__wctype_wint_t wc)
157{
158  return ((wc >= '0' && wc <= '9')
159	  || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
160}
161
162# endif /* ! HAVE_ISWCNTRL */
163
164#endif /* _GL_WCTYPE_H */
165#endif /* _GL_WCTYPE_H */
166