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 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 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */ 35 #if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H) 36 # include <wchar.h> 37 # include <wctype.h> 38 # if defined (HAVE_MBSRTOWCS) /* system is supposed to support XPG5 */ 39 # define HANDLE_MULTIBYTE 1 40 # endif 41 #endif 42 43 /* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */ 44 #if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T) 45 # define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0) 46 # define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0) 47 # define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0) 48 # define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0) 49 # define mbrlen(s, n, ps) (mbrlen) (s, n, 0) 50 # define mbstate_t int 51 #endif 52 53 /* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to 54 handle multibyte chars (some systems define MB_LEN_MAX as 1) */ 55 #ifdef HANDLE_MULTIBYTE 56 # include <limits.h> 57 # if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16) 58 # undef MB_LEN_MAX 59 # endif 60 # if !defined (MB_LEN_MAX) 61 # define MB_LEN_MAX 16 62 # endif 63 #endif 64 65 /************************************************/ 66 /* end of multibyte capability checks for I18N */ 67 /************************************************/ 68 69 /* 70 * Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar: 71 * 72 * MB_FIND_ANY find any multibyte character 73 * MB_FIND_NONZERO find a non-zero-width multibyte character 74 */ 75 76 #define MB_FIND_ANY 0x00 77 #define MB_FIND_NONZERO 0x01 78 79 extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); 80 extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); 81 82 #ifdef HANDLE_MULTIBYTE 83 84 extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); 85 extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); 86 extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); 87 88 extern int _rl_read_mbchar PARAMS((char *, int)); 89 extern int _rl_read_mbstring PARAMS((int, char *, int)); 90 91 extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); 92 93 #else /* !HANDLE_MULTIBYTE */ 94 95 #undef MB_LEN_MAX 96 #undef MB_CUR_MAX 97 98 #define MB_LEN_MAX 1 99 #define MB_CUR_MAX 1 100 101 #define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1)) 102 #define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2)) 103 104 #endif /* !HANDLE_MULTIBYTE */ 105 106 extern int rl_byte_oriented; 107 108 #endif /* _RL_MBUTIL_H_ */ 109