| 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) && defined (HAVE_MBRTOWC) && defined (HAVE_MBRLEN) && defined (HAVE_WCWIDTH) |
| 49 | /* system is supposed to support XPG5 */ |
| 50 | # define HANDLE_MULTIBYTE 1 |
| 51 | # endif |
| 52 | #endif |
| 53 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 152 | #endif /* !HANDLE_MULTIBYTE */ |
| 153 | |
| 154 | extern int rl_byte_oriented; |
| 155 | |
| 156 | #endif /* _RL_MBUTIL_H_ */ |