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84041b4c EZ |
1 | /* rlmbutil.h -- utility functions for multibyte characters. */ |
2 | ||
3 | /* Copyright (C) 2001 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of the GNU Readline Library, a library for | |
6 | reading lines of text with interactive input and history editing. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. */ | |
22 | ||
23 | #if !defined (_RL_MBUTIL_H_) | |
24 | #define _RL_MBUTIL_H_ | |
25 | ||
26 | #include "rlstdc.h" | |
27 | ||
28 | /************************************************/ | |
29 | /* check multibyte capability for I18N code */ | |
30 | /************************************************/ | |
31 | ||
32 | /* For platforms which support the ISO C amendement 1 functionality we | |
33 | support user defined character classes. */ | |
34 | /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */ | |
35 | #if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H) | |
36 | # include <wchar.h> | |
37 | # include <wctype.h> | |
b585a9fa EZ |
38 | # if defined (HAVE_MBSRTOWCS) && defined (HAVE_MBRTOWC) && defined (HAVE_MBRLEN) && defined (HAVE_WCWIDTH) |
39 | /* system is supposed to support XPG5 */ | |
84041b4c EZ |
40 | # define HANDLE_MULTIBYTE 1 |
41 | # endif | |
42 | #endif | |
43 | ||
b585a9fa EZ |
44 | /* If we don't want multibyte chars even on a system that supports them, let |
45 | the configuring user turn multibyte support off. */ | |
46 | #if defined (NO_MULTIBYTE_SUPPORT) | |
47 | # undef HANDLE_MULTIBYTE | |
48 | #endif | |
49 | ||
84041b4c EZ |
50 | /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */ |
51 | #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T) | |
52 | # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0) | |
53 | # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0) | |
54 | # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0) | |
55 | # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0) | |
56 | # define mbrlen(s, n, ps) (mbrlen) (s, n, 0) | |
57 | # define mbstate_t int | |
58 | #endif | |
59 | ||
60 | /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to | |
61 | handle multibyte chars (some systems define MB_LEN_MAX as 1) */ | |
62 | #ifdef HANDLE_MULTIBYTE | |
63 | # include <limits.h> | |
64 | # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) | |
65 | # undef MB_LEN_MAX | |
66 | # endif | |
67 | # if !defined (MB_LEN_MAX) | |
68 | # define MB_LEN_MAX 16 | |
69 | # endif | |
70 | #endif | |
71 | ||
72 | /************************************************/ | |
73 | /* end of multibyte capability checks for I18N */ | |
74 | /************************************************/ | |
75 | ||
76 | /* | |
77 | * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar: | |
78 | * | |
79 | * MB_FIND_ANY find any multibyte character | |
80 | * MB_FIND_NONZERO find a non-zero-width multibyte character | |
81 | */ | |
82 | ||
83 | #define MB_FIND_ANY 0x00 | |
84 | #define MB_FIND_NONZERO 0x01 | |
85 | ||
86 | extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); | |
87 | extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); | |
88 | ||
89 | #ifdef HANDLE_MULTIBYTE | |
90 | ||
91 | extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); | |
92 | extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); | |
93 | extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); | |
94 | ||
95 | extern int _rl_read_mbchar PARAMS((char *, int)); | |
96 | extern int _rl_read_mbstring PARAMS((int, char *, int)); | |
97 | ||
98 | extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); | |
99 | ||
b585a9fa EZ |
100 | extern wchar_t _rl_char_value PARAMS((char *, int)); |
101 | extern int _rl_walphabetic PARAMS((wchar_t)); | |
102 | ||
103 | #define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc)) | |
104 | #define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc)) | |
105 | ||
106 | #define MB_NEXTCHAR(b,s,c,f) \ | |
107 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \ | |
108 | ? _rl_find_next_mbchar ((b), (s), (c), (f)) \ | |
109 | : ((s) + (c))) | |
110 | #define MB_PREVCHAR(b,s,f) \ | |
111 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \ | |
112 | ? _rl_find_prev_mbchar ((b), (s), (f)) \ | |
113 | : ((s) - 1)) | |
114 | ||
115 | #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) | |
116 | #define MB_NULLWCH(x) ((x) == 0) | |
117 | ||
84041b4c EZ |
118 | #else /* !HANDLE_MULTIBYTE */ |
119 | ||
120 | #undef MB_LEN_MAX | |
121 | #undef MB_CUR_MAX | |
122 | ||
123 | #define MB_LEN_MAX 1 | |
124 | #define MB_CUR_MAX 1 | |
125 | ||
126 | #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1)) | |
127 | #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2)) | |
128 | ||
b585a9fa EZ |
129 | #define _rl_char_value(buf,ind) ((buf)[(ind)]) |
130 | ||
131 | #define _rl_walphabetic(c) (rl_alphabetic (c)) | |
132 | ||
133 | #define _rl_to_wupper(c) (_rl_to_upper (c)) | |
134 | #define _rl_to_wlower(c) (_rl_to_lower (c)) | |
135 | ||
136 | #define MB_NEXTCHAR(b,s,c,f) ((s) + (c)) | |
137 | #define MB_PREVCHAR(b,s,f) ((s) - 1) | |
138 | ||
139 | #define MB_INVALIDCH(x) (0) | |
140 | #define MB_NULLWCH(x) (0) | |
141 | ||
84041b4c EZ |
142 | #endif /* !HANDLE_MULTIBYTE */ |
143 | ||
144 | extern int rl_byte_oriented; | |
145 | ||
146 | #endif /* _RL_MBUTIL_H_ */ |