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/* $OpenBSD: chartype.h,v 1.20 2016/05/06 18:01:40 schwarze Exp $ */
/* $NetBSD: chartype.h,v 1.31 2016/04/11 18:56:31 christos Exp $ */
/*-
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _h_chartype_f
#define _h_chartype_f
/* Ideally we should also test the value of the define to see if it
* supports non-BMP code points without requiring UTF-16, but nothing
* seems to actually advertise this properly, despite Unicode 3.1 having
* been around since 2001... */
#if !defined(__NetBSD__) && !defined(__OpenBSD__)
#ifndef __STDC_ISO_10646__
/* In many places it is assumed that the first 127 code points are ASCII
* compatible, so ensure wchar_t indeed does ISO 10646 and not some other
* funky encoding that could break us in weird and wonderful ways. */
#error wchar_t must store ISO 10646 characters
#endif
#endif
/* Oh for a <uchar.h> with char32_t and __STDC_UTF_32__ in it...
* ref: ISO/IEC DTR 19769
*/
#if WCHAR_MAX < INT32_MAX
#warning Build environment does not support non-BMP characters
#endif
/*
* Conversion buffer
*/
typedef struct ct_buffer_t {
char *cbuff;
size_t csize;
wchar_t *wbuff;
size_t wsize;
} ct_buffer_t;
/* Encode a wide-character string and return the UTF-8 encoded result. */
char *ct_encode_string(const wchar_t *, ct_buffer_t *);
/* Decode a (multi)?byte string and return the wide-character string result. */
wchar_t *ct_decode_string(const char *, ct_buffer_t *);
/* Decode a (multi)?byte argv string array.
* The pointer returned must be free()d when done. */
protected wchar_t **ct_decode_argv(int, const char *[], ct_buffer_t *);
/* Encode a character into the destination buffer, provided there is sufficient
* buffer space available. Returns the number of bytes used up (zero if the
* character cannot be encoded, -1 if there was not enough space available). */
protected ssize_t ct_encode_char(char *, size_t, wchar_t);
protected size_t ct_enc_width(wchar_t);
/* The maximum buffer size to hold the most unwieldy visual representation,
* in this case \U+nnnnn. */
#define VISUAL_WIDTH_MAX 8
/* The terminal is thought of in terms of X columns by Y lines. In the cases
* where a wide character takes up more than one column, the adjacent
* occupied column entries will contain this faux character. */
#define MB_FILL_CHAR ((wchar_t)-1)
/* Visual width of character c, taking into account ^? , \0177 and \U+nnnnn
* style visual expansions. */
protected int ct_visual_width(wchar_t);
/* Turn the given character into the appropriate visual format, matching
* the width given by ct_visual_width(). Returns the number of characters used
* up, or -1 if insufficient space. Buffer length is in count of wchar_t's. */
protected ssize_t ct_visual_char(wchar_t *, size_t, wchar_t);
/* Convert the given string into visual format, using the ct_visual_char()
* function. Uses a static buffer, so not threadsafe. */
protected const wchar_t *ct_visual_string(const wchar_t *);
/* printable character, use ct_visual_width() to find out display width */
#define CHTYPE_PRINT ( 0)
/* control character found inside the ASCII portion of the charset */
#define CHTYPE_ASCIICTL (-1)
/* a \t */
#define CHTYPE_TAB (-2)
/* a \n */
#define CHTYPE_NL (-3)
/* non-printable character */
#define CHTYPE_NONPRINT (-4)
/* classification of character c, as one of the above defines */
protected int ct_chr_class(wchar_t c);
#endif /* _chartype_f */
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