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 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 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) && defined (HAVE_LOCALE_H) 36 # include <wchar.h> 37 # include <wctype.h> 38 # if defined (HAVE_ISWCTYPE) && \ 39 defined (HAVE_ISWLOWER) && \ 40 defined (HAVE_ISWUPPER) && \ 41 defined (HAVE_MBSRTOWCS) && \ 42 defined (HAVE_MBRTOWC) && \ 43 defined (HAVE_MBRLEN) && \ 44 defined (HAVE_TOWLOWER) && \ 45 defined (HAVE_TOWUPPER) && \ 46 defined (HAVE_WCHAR_T) && \ 47 defined (HAVE_WCWIDTH) 48 /* system is supposed to support XPG5 */ 49 # define HANDLE_MULTIBYTE 1 50 # endif 51 #endif 52 53 /* If we don't want multibyte chars even on a system that supports them, let 54 the configuring user turn multibyte support off. */ 55 #if defined (NO_MULTIBYTE_SUPPORT) 56 # undef HANDLE_MULTIBYTE 57 #endif 58 59 /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */ 60 #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T) 61 # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0) 62 # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0) 63 # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0) 64 # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0) 65 # define mbrlen(s, n, ps) (mbrlen) (s, n, 0) 66 # define mbstate_t int 67 #endif 68 69 /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to 70 handle multibyte chars (some systems define MB_LEN_MAX as 1) */ 71 #ifdef HANDLE_MULTIBYTE 72 # include <limits.h> 73 # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) 74 # undef MB_LEN_MAX 75 # endif 76 # if !defined (MB_LEN_MAX) 77 # define MB_LEN_MAX 16 78 # endif 79 #endif 80 81 /************************************************/ 82 /* end of multibyte capability checks for I18N */ 83 /************************************************/ 84 85 /* 86 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar: 87 * 88 * MB_FIND_ANY find any multibyte character 89 * MB_FIND_NONZERO find a non-zero-width multibyte character 90 */ 91 92 #define MB_FIND_ANY 0x00 93 #define MB_FIND_NONZERO 0x01 94 95 extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); 96 extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); 97 98 #ifdef HANDLE_MULTIBYTE 99 100 extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); 101 extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); 102 extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); 103 104 extern int _rl_read_mbchar PARAMS((char *, int)); 105 extern int _rl_read_mbstring PARAMS((int, char *, int)); 106 107 extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); 108 109 extern wchar_t _rl_char_value PARAMS((char *, int)); 110 extern int _rl_walphabetic PARAMS((wchar_t)); 111 112 #define _rl_to_wupper(wc) (iswlower (wc) ? (wchar_t)towupper (wc) : (wc)) 113 #define _rl_to_wlower(wc) (iswupper (wc) ? (wchar_t)towlower (wc) : (wc)) 114 115 #define MB_NEXTCHAR(b,s,c,f) \ 116 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \ 117 ? _rl_find_next_mbchar ((b), (s), (c), (f)) \ 118 : ((s) + (c))) 119 #define MB_PREVCHAR(b,s,f) \ 120 ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \ 121 ? _rl_find_prev_mbchar ((b), (s), (f)) \ 122 : ((s) - 1)) 123 124 #define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2) 125 #define MB_NULLWCH(x) ((x) == 0) 126 127 #else /* !HANDLE_MULTIBYTE */ 128 129 #undef MB_LEN_MAX 130 #undef MB_CUR_MAX 131 132 #define MB_LEN_MAX 1 133 #define MB_CUR_MAX 1 134 135 #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1)) 136 #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2)) 137 138 #define _rl_char_value(buf,ind) ((buf)[(ind)]) 139 140 #define _rl_walphabetic(c) (rl_alphabetic (c)) 141 142 #define _rl_to_wupper(c) (_rl_to_upper (c)) 143 #define _rl_to_wlower(c) (_rl_to_lower (c)) 144 145 #define MB_NEXTCHAR(b,s,c,f) ((s) + (c)) 146 #define MB_PREVCHAR(b,s,f) ((s) - 1) 147 148 #define MB_INVALIDCH(x) (0) 149 #define MB_NULLWCH(x) (0) 150 151 #endif /* !HANDLE_MULTIBYTE */ 152 153 extern int rl_byte_oriented; 154 155 #endif /* _RL_MBUTIL_H_ */ 156