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 96extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); 97extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); 98 99#ifdef HANDLE_MULTIBYTE 100 101extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); 102extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); 103extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); 104 105extern int _rl_read_mbchar PARAMS((char *, int)); 106extern int _rl_read_mbstring PARAMS((int, char *, int)); 107 108extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int)); 109 110extern wchar_t _rl_char_value PARAMS((char *, int)); 111extern 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 154extern int rl_byte_oriented; 155 156#endif /* _RL_MBUTIL_H_ */ 157