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 80extern int _rl_find_prev_mbchar PARAMS((char *, int, int)); 81extern int _rl_find_next_mbchar PARAMS((char *, int, int, int)); 82 83#ifdef HANDLE_MULTIBYTE 84 85extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *)); 86extern int _rl_get_char_len PARAMS((char *, mbstate_t *)); 87extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *)); 88 89extern int _rl_read_mbchar PARAMS((char *, int)); 90extern int _rl_read_mbstring PARAMS((int, char *, int)); 91 92extern 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 107extern int rl_byte_oriented; 108 109#endif /* _RL_MBUTIL_H_ */ 110