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/* $OpenBSD: utf8-combined.c,v 1.3 2023/09/15 15:49:05 nicm Exp $ */
/*
* Copyright (c) 2023 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "tmux.h"
static const wchar_t utf8_modifier_table[] = {
0x1F1E6,
0x1F1E7,
0x1F1E8,
0x1F1E9,
0x1F1EA,
0x1F1EB,
0x1F1EC,
0x1F1ED,
0x1F1EE,
0x1F1EF,
0x1F1F0,
0x1F1F1,
0x1F1F2,
0x1F1F3,
0x1F1F4,
0x1F1F5,
0x1F1F6,
0x1F1F7,
0x1F1F8,
0x1F1F9,
0x1F1FA,
0x1F1FB,
0x1F1FC,
0x1F1FD,
0x1F1FE,
0x1F1FF,
0x1F3FB,
0x1F3FC,
0x1F3FD,
0x1F3FE,
0x1F3FF
};
/* Has this got a zero width joiner at the end? */
int
utf8_has_zwj(const struct utf8_data *ud)
{
if (ud->size < 3)
return (0);
return (memcmp(ud->data + ud->size - 3, "\342\200\215", 3) == 0);
}
/* Is this a zero width joiner? */
int
utf8_is_zwj(const struct utf8_data *ud)
{
if (ud->size != 3)
return (0);
return (memcmp(ud->data, "\342\200\215", 3) == 0);
}
/* Is this a variation selector? */
int
utf8_is_vs(const struct utf8_data *ud)
{
if (ud->size != 3)
return (0);
return (memcmp(ud->data, "\357\270\217", 3) == 0);
}
/* Is this in the modifier table? */
int
utf8_is_modifier(const struct utf8_data *ud)
{
wchar_t wc;
if (utf8_towc(ud, &wc) != UTF8_DONE)
return (0);
if (!utf8_in_table(wc, utf8_modifier_table,
nitems(utf8_modifier_table)))
return (0);
return (1);
}
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