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/* rlmbutil.h -- utility functions for multibyte characters. */
/* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
This file is part of the GNU Readline Library, a library for
reading lines of text with interactive input and history editing.
The GNU Readline Library is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2, or
(at your option) any later version.
The GNU Readline Library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#if !defined (_RL_MBUTIL_H_)
#define _RL_MBUTIL_H_
#include "rlstdc.h"
/************************************************/
/* check multibyte capability for I18N code */
/************************************************/
/* For platforms which support the ISO C amendement 1 functionality we
support user defined character classes.
Some platforms have the multibyte functions such as mbsrtowcs but
are lacking the multitype type mbstate_t. BeOS (unknown version)
and HP/UX 11.23 without _XOPEN_SOURCE=500 are like this.
We really need mbstate_t type to operate properly. For example, see
compute_lcd_of_matches, where two mbstate_t's are active at the same
time. So we require both the functions and the mbstate_t type in
order to enable multibyte support. */
/* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
#if defined (HAVE_WCTYPE_H) && defined (HAVE_WCHAR_H)
# include <wchar.h>
# include <wctype.h>
# if defined (HAVE_MBSTATE_T) && defined (HAVE_MBSRTOWCS) && defined (HAVE_MBRTOWC) && defined (HAVE_MBRLEN) && defined (HAVE_WCWIDTH)
/* system is supposed to support XPG5 */
# define HANDLE_MULTIBYTE 1
# endif
#endif
/* If we don't want multibyte chars even on a system that supports them, let
the configuring user turn multibyte support off. */
#if defined (NO_MULTIBYTE_SUPPORT)
# undef HANDLE_MULTIBYTE
#endif
/* Some systems, like BeOS, have multibyte encodings but lack mbstate_t. */
#if HANDLE_MULTIBYTE && !defined (HAVE_MBSTATE_T)
# define wcsrtombs(dest, src, len, ps) (wcsrtombs) (dest, src, len, 0)
# define mbsrtowcs(dest, src, len, ps) (mbsrtowcs) (dest, src, len, 0)
# define wcrtomb(s, wc, ps) (wcrtomb) (s, wc, 0)
# define mbrtowc(pwc, s, n, ps) (mbrtowc) (pwc, s, n, 0)
# define mbrlen(s, n, ps) (mbrlen) (s, n, 0)
# define mbstate_t int
#endif
/* Make sure MB_LEN_MAX is at least 16 on systems that claim to be able to
handle multibyte chars (some systems define MB_LEN_MAX as 1) */
#ifdef HANDLE_MULTIBYTE
# include <limits.h>
# if defined(MB_LEN_MAX) && (MB_LEN_MAX < 16)
# undef MB_LEN_MAX
# endif
# if !defined (MB_LEN_MAX)
# define MB_LEN_MAX 16
# endif
#endif
/************************************************/
/* end of multibyte capability checks for I18N */
/************************************************/
/*
* Flags for _rl_find_prev_mbchar and _rl_find_next_mbchar:
*
* MB_FIND_ANY find any multibyte character
* MB_FIND_NONZERO find a non-zero-width multibyte character
*/
#define MB_FIND_ANY 0x00
#define MB_FIND_NONZERO 0x01
extern int _rl_find_prev_mbchar PARAMS((char *, int, int));
extern int _rl_find_next_mbchar PARAMS((char *, int, int, int));
#ifdef HANDLE_MULTIBYTE
extern int _rl_compare_chars PARAMS((char *, int, mbstate_t *, char *, int, mbstate_t *));
extern int _rl_get_char_len PARAMS((char *, mbstate_t *));
extern int _rl_adjust_point PARAMS((char *, int, mbstate_t *));
extern int _rl_read_mbchar PARAMS((char *, int));
extern int _rl_read_mbstring PARAMS((int, char *, int));
extern int _rl_is_mbchar_matched PARAMS((char *, int, int, char *, int));
extern wchar_t _rl_char_value PARAMS((char *, int));
extern int _rl_walphabetic PARAMS((wchar_t));
#define _rl_to_wupper(wc) (iswlower (wc) ? towupper (wc) : (wc))
#define _rl_to_wlower(wc) (iswupper (wc) ? towlower (wc) : (wc))
#define MB_NEXTCHAR(b,s,c,f) \
((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
? _rl_find_next_mbchar ((b), (s), (c), (f)) \
: ((s) + (c)))
#define MB_PREVCHAR(b,s,f) \
((MB_CUR_MAX > 1 && rl_byte_oriented == 0) \
? _rl_find_prev_mbchar ((b), (s), (f)) \
: ((s) - 1))
#define MB_INVALIDCH(x) ((x) == (size_t)-1 || (x) == (size_t)-2)
#define MB_NULLWCH(x) ((x) == 0)
#else /* !HANDLE_MULTIBYTE */
#undef MB_LEN_MAX
#undef MB_CUR_MAX
#define MB_LEN_MAX 1
#define MB_CUR_MAX 1
#define _rl_find_prev_mbchar(b, i, f) (((i) == 0) ? (i) : ((i) - 1))
#define _rl_find_next_mbchar(b, i1, i2, f) ((i1) + (i2))
#define _rl_char_value(buf,ind) ((buf)[(ind)])
#define _rl_walphabetic(c) (rl_alphabetic (c))
#define _rl_to_wupper(c) (_rl_to_upper (c))
#define _rl_to_wlower(c) (_rl_to_lower (c))
#define MB_NEXTCHAR(b,s,c,f) ((s) + (c))
#define MB_PREVCHAR(b,s,f) ((s) - 1)
#define MB_INVALIDCH(x) (0)
#define MB_NULLWCH(x) (0)
#endif /* !HANDLE_MULTIBYTE */
extern int rl_byte_oriented;
#endif /* _RL_MBUTIL_H_ */
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