1 /* rlmbutil.h -- utility functions for multibyte characters. */
3 /* Copyright (C) 2001-2009 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library (Readline), a library
6 for reading lines of text with interactive input and history editing.
8 Readline is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 Readline is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Readline. If not, see <http://www.gnu.org/licenses/>.
22 #if !defined (_RL_MBUTIL_H_)
27 /************************************************/
28 /* check multibyte capability for I18N code */
29 /************************************************/
31 /* For platforms which support the ISO C amendement 1 functionality we
32 support user defined character classes. */
33 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
34 #if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H) && defined (HAVE_LOCALE_H)
37 # if defined (HAVE_ISWCTYPE) && \
38 defined (HAVE_ISWLOWER) && \
39 defined (HAVE_ISWUPPER) && \
40 defined (HAVE_MBSRTOWCS) && \
41 defined (HAVE_MBRTOWC) && \
42 defined (HAVE_MBRLEN) && \
43 defined (HAVE_TOWLOWER) && \
44 defined (HAVE_TOWUPPER) && \
45 defined (HAVE_WCHAR_T) && \
46 defined (HAVE_WCWIDTH)
47 /* system is supposed to support XPG5 */
48 # define HANDLE_MULTIBYTE 1
52 /* If we don't want multibyte chars even on a system that supports them, let
53 the configuring user turn multibyte support off. */
54 #if defined (NO_MULTIBYTE_SUPPORT)
55 # undef HANDLE_MULTIBYTE
58 /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */
59 #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T)
60 # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0)
61 # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0)
62 # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0)
63 # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0)
64 # define mbrlen(s, n, ps) (mbrlen) (s, n, 0)
65 # define mbstate_t int
68 /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to
69 handle multibyte chars (some systems define MB_LEN_MAX as 1) */
70 #ifdef HANDLE_MULTIBYTE
72 # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16)
75 # if !defined (MB_LEN_MAX)
76 # define MB_LEN_MAX 16
80 /************************************************/
81 /* end of multibyte capability checks for I18N */
82 /************************************************/
85 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar:
87 * MB_FIND_ANY find any multibyte character
88 * MB_FIND_NONZERO find a non-zero-width multibyte character
91 #define MB_FIND_ANY 0x00
92 #define MB_FIND_NONZERO 0x01
94 extern int _rl_find_prev_mbchar
PARAMS((char *, int, int));
95 extern int _rl_find_next_mbchar
PARAMS((char *, int, int, int));
97 #ifdef HANDLE_MULTIBYTE
99 extern int _rl_compare_chars
PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));
100 extern int _rl_get_char_len
PARAMS((char *, mbstate_t *));
101 extern int _rl_adjust_point
PARAMS((char *, int, mbstate_t *));
103 extern int _rl_read_mbchar
PARAMS((char *, int));
104 extern int _rl_read_mbstring
PARAMS((int, char *, int));
106 extern int _rl_is_mbchar_matched
PARAMS((char *, int, int, char *, int));
108 extern wchar_t _rl_char_value
PARAMS((char *, int));
109 extern int _rl_walphabetic
PARAMS((wchar_t));
111 #define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))
112 #define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))
114 #define MB_NEXTCHAR(b,s,c,f) \
115 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
116 ? _rl_find_next_mbchar ((b), (s), (c), (f)) \
118 #define MB_PREVCHAR(b,s,f) \
119 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
120 ? _rl_find_prev_mbchar ((b), (s), (f)) \
123 #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
124 #define MB_NULLWCH(x) ((x) == 0)
126 #else /* !HANDLE_MULTIBYTE */
134 #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))
135 #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))
137 #define _rl_char_value(buf,ind) ((buf)[(ind)])
139 #define _rl_walphabetic(c) (rl_alphabetic (c))
141 #define _rl_to_wupper(c) (_rl_to_upper (c))
142 #define _rl_to_wlower(c) (_rl_to_lower (c))
144 #define MB_NEXTCHAR(b,s,c,f) ((s) + (c))
145 #define MB_PREVCHAR(b,s,f) ((s) - 1)
147 #define MB_INVALIDCH(x) (0)
148 #define MB_NULLWCH(x) (0)
150 #endif /* !HANDLE_MULTIBYTE */
152 extern int rl_byte_oriented
;
154 #endif /* _RL_MBUTIL_H_ */
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