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