| 1 | /* rlmbutil.h -- utility functions for multibyte characters. */ |
| 2 | |
| 3 | /* Copyright (C) 2001, 2003 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 | |
| 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 | |
| 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> |
| 48 | # if defined (HAVE_MBSTATE_T) && defined (HAVE_MBSRTOWCS) |
| 49 | /* system is supposed to support XPG5 */ |
| 50 | # define HANDLE_MULTIBYTE 1 |
| 51 | # endif |
| 52 | #endif |
| 53 | |
| 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_ */ |