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9255ee31 EZ |
1 | /* rlmbutil.h -- utility functions for multibyte characters. */ |
2 | ||
f4daae62 | 3 | /* Copyright (C) 2001, 2003 Free Software Foundation, Inc. |
9255ee31 EZ |
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 | |
f4daae62 MC |
33 | support user defined character classes. |
34 | ||
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. | |
38 | ||
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. */ | |
43 | ||
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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) | |
46 | # include <wchar.h> | |
47 | # include <wctype.h> | |
5bdf8622 | 48 | # if defined (HAVE_MBSTATE_T) && defined (HAVE_MBSRTOWCS) && defined (HAVE_MBRTOWC) && defined (HAVE_MBRLEN) && defined (HAVE_WCWIDTH) |
832a9484 | 49 | /* system is supposed to support XPG5 */ |
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50 | # define HANDLE_MULTIBYTE 1 |
51 | # endif | |
52 | #endif | |
53 | ||
5bdf8622 DJ |
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 | |
58 | #endif | |
59 | ||
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 | |
68 | #endif | |
69 | ||
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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 | |
73 | # include <limits.h> | |
74 | # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) | |
75 | # undef MB_LEN_MAX | |
76 | # endif | |
77 | # if !defined (MB_LEN_MAX) | |
78 | # define MB_LEN_MAX 16 | |
79 | # endif | |
80 | #endif | |
81 | ||
82 | /************************************************/ | |
83 | /* end of multibyte capability checks for I18N */ | |
84 | /************************************************/ | |
85 | ||
86 | /* | |
87 | * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar: | |
88 | * | |
89 | * MB_FIND_ANY find any multibyte character | |
90 | * MB_FIND_NONZERO find a non-zero-width multibyte character | |
91 | */ | |
92 | ||
93 | #define MB_FIND_ANY 0x00 | |
94 | #define MB_FIND_NONZERO 0x01 | |
95 | ||
96 | extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); | |
97 | extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); | |
98 | ||
99 | #ifdef HANDLE_MULTIBYTE | |
100 | ||
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 *)); | |
104 | ||
105 | extern int _rl_read_mbchar PARAMS((char *, int)); | |
106 | extern int _rl_read_mbstring PARAMS((int, char *, int)); | |
107 | ||
108 | extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); | |
109 | ||
5bdf8622 DJ |
110 | extern wchar_t _rl_char_value PARAMS((char *, int)); |
111 | extern int _rl_walphabetic PARAMS((wchar_t)); | |
112 | ||
113 | #define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc)) | |
114 | #define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc)) | |
115 | ||
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)) \ | |
119 | : ((s) + (c))) | |
120 | #define MB_PREVCHAR(b,s,f) \ | |
121 | ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \ | |
122 | ? _rl_find_prev_mbchar ((b), (s), (f)) \ | |
123 | : ((s) - 1)) | |
124 | ||
125 | #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) | |
126 | #define MB_NULLWCH(x) ((x) == 0) | |
127 | ||
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128 | #else /* !HANDLE_MULTIBYTE */ |
129 | ||
130 | #undef MB_LEN_MAX | |
131 | #undef MB_CUR_MAX | |
132 | ||
133 | #define MB_LEN_MAX 1 | |
134 | #define MB_CUR_MAX 1 | |
135 | ||
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)) | |
138 | ||
5bdf8622 DJ |
139 | #define _rl_char_value(buf,ind) ((buf)[(ind)]) |
140 | ||
141 | #define _rl_walphabetic(c) (rl_alphabetic (c)) | |
142 | ||
143 | #define _rl_to_wupper(c) (_rl_to_upper (c)) | |
144 | #define _rl_to_wlower(c) (_rl_to_lower (c)) | |
145 | ||
146 | #define MB_NEXTCHAR(b,s,c,f) ((s) + (c)) | |
147 | #define MB_PREVCHAR(b,s,f) ((s) - 1) | |
148 | ||
149 | #define MB_INVALIDCH(x) (0) | |
150 | #define MB_NULLWCH(x) (0) | |
151 | ||
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152 | #endif /* !HANDLE_MULTIBYTE */ |
153 | ||
154 | extern int rl_byte_oriented; | |
155 | ||
156 | #endif /* _RL_MBUTIL_H_ */ |