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1 | /* rlmbutil.h -- utility functions for multibyte characters. */ |
2 | ||
f4daae62 | 3 | /* Copyright (C) 2001, 2003 Free Software Foundation, Inc. |
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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> | |
f4daae62 | 48 | # if defined (HAVE_MBSTATE_T) && defined (HAVE_MBSRTOWCS) |
832a9484 | 49 | /* system is supposed to support XPG5 */ |
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50 | # define HANDLE_MULTIBYTE 1 |
51 | # endif | |
52 | #endif | |
53 | ||
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54 | /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to |
55 | handle multibyte chars (some systems define MB_LEN_MAX as 1) */ | |
56 | #ifdef HANDLE_MULTIBYTE | |
57 | # include <limits.h> | |
58 | # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) | |
59 | # undef MB_LEN_MAX | |
60 | # endif | |
61 | # if !defined (MB_LEN_MAX) | |
62 | # define MB_LEN_MAX 16 | |
63 | # endif | |
64 | #endif | |
65 | ||
66 | /************************************************/ | |
67 | /* end of multibyte capability checks for I18N */ | |
68 | /************************************************/ | |
69 | ||
70 | /* | |
71 | * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar: | |
72 | * | |
73 | * MB_FIND_ANY find any multibyte character | |
74 | * MB_FIND_NONZERO find a non-zero-width multibyte character | |
75 | */ | |
76 | ||
77 | #define MB_FIND_ANY 0x00 | |
78 | #define MB_FIND_NONZERO 0x01 | |
79 | ||
80 | extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); | |
81 | extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); | |
82 | ||
83 | #ifdef HANDLE_MULTIBYTE | |
84 | ||
85 | extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); | |
86 | extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); | |
87 | extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); | |
88 | ||
89 | extern int _rl_read_mbchar PARAMS((char *, int)); | |
90 | extern int _rl_read_mbstring PARAMS((int, char *, int)); | |
91 | ||
92 | extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); | |
93 | ||
94 | #else /* !HANDLE_MULTIBYTE */ | |
95 | ||
96 | #undef MB_LEN_MAX | |
97 | #undef MB_CUR_MAX | |
98 | ||
99 | #define MB_LEN_MAX 1 | |
100 | #define MB_CUR_MAX 1 | |
101 | ||
102 | #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1)) | |
103 | #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2)) | |
104 | ||
105 | #endif /* !HANDLE_MULTIBYTE */ | |
106 | ||
107 | extern int rl_byte_oriented; | |
108 | ||
109 | #endif /* _RL_MBUTIL_H_ */ |