mirror of https://github.com/tmux/tmux.git
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* $Id: utf8.c,v 1.3 2009-01-17 18:38:12 nicm Exp $ */
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/*
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* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
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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 <string.h>
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#include "tmux.h"
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u_int
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utf8_combine(const u_char *data)
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{
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u_int uv;
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if (data[1] == 0xff)
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uv = data[0];
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else if (data[2] == 0xff) {
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uv = data[1] & 0x3f;
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uv |= (data[0] & 0x1f) << 6;
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} else if (data[3] == 0xff) {
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uv = data[2] & 0x3f;
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uv |= (data[1] & 0x3f) << 6;
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uv |= (data[0] & 0x0f) << 12;
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} else {
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uv = data[3] & 0x3f;
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uv |= (data[2] & 0x3f) << 6;
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uv |= (data[1] & 0x3f) << 12;
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uv |= (data[0] & 0x3f) << 18;
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}
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return (uv);
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}
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void
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utf8_split(u_int uv, u_char *data)
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{
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memset(data, 0xff, 4);
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if (uv <= 0x7f)
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data[0] = uv;
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else if (uv > 0x7f && uv <= 0x7ff) {
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data[0] = (uv >> 6) | 0xc0;
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data[1] = (uv & 0x3f) | 0x80;
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} else if (uv > 0x7ff && uv <= 0xffff) {
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data[0] = (uv >> 12) | 0xe0;
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data[1] = ((uv >> 6) & 0x3f) | 0x80;
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data[2] = (uv & 0x3f) | 0x80;
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} else if (uv > 0xffff && uv <= 0x10ffff) {
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data[0] = (uv >> 18) | 0xf0;
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data[1] = ((uv >> 12) & 0x3f) | 0x80;
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data[2] = ((uv >> 6) & 0x3f) | 0x80;
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data[3] = (uv & 0x3f) | 0x80;
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}
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}
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int
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utf8_width(u_int uv)
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{
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if ((uv >= 0x1100 && uv <= 0x115f) ||
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uv == 0x2329 ||
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uv == 0x232a ||
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(uv >= 0x2e80 && uv <= 0xa4cf && uv != 0x303f) ||
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(uv >= 0xac00 && uv <= 0xd7a3) ||
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(uv >= 0xf900 && uv <= 0xfaff) ||
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(uv >= 0xfe10 && uv <= 0xfe19) ||
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(uv >= 0xfe30 && uv <= 0xfe6f) ||
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(uv >= 0xff00 && uv <= 0xff60) ||
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(uv >= 0xffe0 && uv <= 0xffe6) ||
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(uv >= 0x20000 && uv <= 0x2fffd) ||
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(uv >= 0x30000 && uv <= 0x3fffd))
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return (2);
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return (1);
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}
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