1 /* rlmbutil.h -- utility functions for multibyte characters. */
3 /* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library, a library for
6 reading lines of text with interactive input and history editing.
8 The GNU Readline Library is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2, or
11 (at your option) any later version.
13 The GNU Readline Library is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 The GNU General Public License is often shipped with GNU software, and
19 is generally kept in a file called COPYING or LICENSE. If you do not
20 have a copy of the license, write to the Free Software Foundation,
21 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
23 #if !defined (_RL_MBUTIL_H_)
28 /************************************************/
29 /* check multibyte capability for I18N code */
30 /************************************************/
32 /* For platforms which support the ISO C amendement 1 functionality we
33 support user defined character classes.
35 Some platforms have the multibyte functions such as mbsrtowcs but
36 are lacking the multitype type mbstate_t. BeOS (unknown version)
37 and HP/UX 11.23 without _XOPEN_SOURCE=500 are like this.
39 We really need mbstate_t type to operate properly. For example, see
40 compute_lcd_of_matches, where two mbstate_t's are active at the same
41 time. So we require both the functions and the mbstate_t type in
42 order to enable multibyte support. */
44 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
45 #if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H)
48 # if defined (HAVE_MBSTATE_T) && defined (HAVE_MBSRTOWCS) && defined (HAVE_MBRTOWC) && defined (HAVE_MBRLEN) && defined (HAVE_WCWIDTH)
49 /* system is supposed to support XPG5 */
50 # define HANDLE_MULTIBYTE 1
54 /* If we don't want multibyte chars even on a system that supports them, let
55 the configuring user turn multibyte support off. */
56 #if defined (NO_MULTIBYTE_SUPPORT)
57 # undef HANDLE_MULTIBYTE
60 /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */
61 #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T)
62 # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0)
63 # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0)
64 # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0)
65 # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0)
66 # define mbrlen(s, n, ps) (mbrlen) (s, n, 0)
67 # define mbstate_t int
70 /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to
71 handle multibyte chars (some systems define MB_LEN_MAX as 1) */
72 #ifdef HANDLE_MULTIBYTE
74 # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16)
77 # if !defined (MB_LEN_MAX)
78 # define MB_LEN_MAX 16
82 /************************************************/
83 /* end of multibyte capability checks for I18N */
84 /************************************************/
87 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar:
89 * MB_FIND_ANY find any multibyte character
90 * MB_FIND_NONZERO find a non-zero-width multibyte character
93 #define MB_FIND_ANY 0x00
94 #define MB_FIND_NONZERO 0x01
96 extern int _rl_find_prev_mbchar
PARAMS((char *, int, int));
97 extern int _rl_find_next_mbchar
PARAMS((char *, int, int, int));
99 #ifdef HANDLE_MULTIBYTE
101 extern int _rl_compare_chars
PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));
102 extern int _rl_get_char_len
PARAMS((char *, mbstate_t *));
103 extern int _rl_adjust_point
PARAMS((char *, int, mbstate_t *));
105 extern int _rl_read_mbchar
PARAMS((char *, int));
106 extern int _rl_read_mbstring
PARAMS((int, char *, int));
108 extern int _rl_is_mbchar_matched
PARAMS((char *, int, int, char *, int));
110 extern wchar_t _rl_char_value
PARAMS((char *, int));
111 extern int _rl_walphabetic
PARAMS((wchar_t));
113 #define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))
114 #define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))
116 #define MB_NEXTCHAR(b,s,c,f) \
117 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
118 ? _rl_find_next_mbchar ((b), (s), (c), (f)) \
120 #define MB_PREVCHAR(b,s,f) \
121 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
122 ? _rl_find_prev_mbchar ((b), (s), (f)) \
125 #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
126 #define MB_NULLWCH(x) ((x) == 0)
128 #else /* !HANDLE_MULTIBYTE */
136 #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))
137 #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))
139 #define _rl_char_value(buf,ind) ((buf)[(ind)])
141 #define _rl_walphabetic(c) (rl_alphabetic (c))
143 #define _rl_to_wupper(c) (_rl_to_upper (c))
144 #define _rl_to_wlower(c) (_rl_to_lower (c))
146 #define MB_NEXTCHAR(b,s,c,f) ((s) + (c))
147 #define MB_PREVCHAR(b,s,f) ((s) - 1)
149 #define MB_INVALIDCH(x) (0)
150 #define MB_NULLWCH(x) (0)
152 #endif /* !HANDLE_MULTIBYTE */
154 extern int rl_byte_oriented
;
156 #endif /* _RL_MBUTIL_H_ */
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