1/* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
2
3   Copyright (C) 2006, 2007, 2008, 2009 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 __GNUC__ >= 3
32@PRAGMA_SYSTEM_HEADER@
33#endif
34
35#if @HAVE_WINT_T@
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
38   <wchar.h>.
39   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
40   included before <wchar.h>.  */
41# include <stddef.h>
42# include <stdio.h>
43# include <time.h>
44# include <wchar.h>
45#endif
46
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.  */
50#if @HAVE_WCTYPE_H@
51# @INCLUDE_NEXT@ @NEXT_WCTYPE_H@
52#endif
53
54#ifndef _GL_WCTYPE_H
55#define _GL_WCTYPE_H
56
57/* Define wint_t.  (Also done in wchar.in.h.)  */
58#if !@HAVE_WINT_T@ && !defined wint_t
59# define wint_t int
60# ifndef WEOF
61#  define WEOF -1
62# endif
63#endif
64
65/* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
66   Linux libc5 has <wctype.h> and the functions but they are broken.
67   Assume all 12 functions are implemented the same way, or not at all.  */
68#if ! @HAVE_ISWCNTRL@ || @REPLACE_ISWCNTRL@
69
70/* IRIX 5.3 has macros but no functions, its isw* macros refer to an
71   undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
72   refer to system functions like _iswctype that are not in the
73   standard C library.  Rather than try to get ancient buggy
74   implementations like this to work, just disable them.  */
75#  undef iswalnum
76#  undef iswalpha
77#  undef iswblank
78#  undef iswcntrl
79#  undef iswdigit
80#  undef iswgraph
81#  undef iswlower
82#  undef iswprint
83#  undef iswpunct
84#  undef iswspace
85#  undef iswupper
86#  undef iswxdigit
87
88/* Linux libc5 has <wctype.h> and the functions but they are broken.  */
89#  if @REPLACE_ISWCNTRL@
90#   define iswalnum rpl_iswalnum
91#   define iswalpha rpl_iswalpha
92#   define iswblank rpl_iswblank
93#   define iswcntrl rpl_iswcntrl
94#   define iswdigit rpl_iswdigit
95#   define iswgraph rpl_iswgraph
96#   define iswlower rpl_iswlower
97#   define iswprint rpl_iswprint
98#   define iswpunct rpl_iswpunct
99#   define iswspace rpl_iswspace
100#   define iswupper rpl_iswupper
101#   define iswxdigit rpl_iswxdigit
102#  endif
103
104static inline int
105iswalnum (wint_t wc)
106{
107  return ((wc >= '0' && wc <= '9')
108	  || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
109}
110
111static inline int
112iswalpha (wint_t wc)
113{
114  return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
115}
116
117static inline int
118iswblank (wint_t wc)
119{
120  return wc == ' ' || wc == '\t';
121}
122
123static inline int
124iswcntrl (wint_t wc)
125{
126  return (wc & ~0x1f) == 0 || wc == 0x7f;
127}
128
129static inline int
130iswdigit (wint_t wc)
131{
132  return wc >= '0' && wc <= '9';
133}
134
135static inline int
136iswgraph (wint_t wc)
137{
138  return wc >= '!' && wc <= '~';
139}
140
141static inline int
142iswlower (wint_t wc)
143{
144  return wc >= 'a' && wc <= 'z';
145}
146
147static inline int
148iswprint (wint_t wc)
149{
150  return wc >= ' ' && wc <= '~';
151}
152
153static inline int
154iswpunct (wint_t wc)
155{
156  return (wc >= '!' && wc <= '~'
157	  && !((wc >= '0' && wc <= '9')
158	       || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
159}
160
161static inline int
162iswspace (wint_t wc)
163{
164  return (wc == ' ' || wc == '\t'
165	  || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
166}
167
168static inline int
169iswupper (wint_t wc)
170{
171  return wc >= 'A' && wc <= 'Z';
172}
173
174static inline int
175iswxdigit (wint_t wc)
176{
177  return ((wc >= '0' && wc <= '9')
178	  || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
179}
180
181# endif /* ! HAVE_ISWCNTRL */
182
183#endif /* _GL_WCTYPE_H */
184#endif /* _GL_WCTYPE_H */
185