mirror of
https://github.com/tmux/tmux.git
synced 2024-11-18 02:18:53 +00:00
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* $Id: utf8.c,v 1.2 2008-09-25 20:08:56 nicm Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
|
|
*
|
|
* 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 <string.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
u_int
|
|
utf8_combine(const u_char data[4])
|
|
{
|
|
u_int uv;
|
|
|
|
if (data[1] == 0xff)
|
|
uv = data[0];
|
|
else if (data[2] == 0xff) {
|
|
uv = data[1] & 0x3f;
|
|
uv |= (data[0] & 0x1f) << 6;
|
|
} else if (data[3] == 0xff) {
|
|
uv = data[2] & 0x3f;
|
|
uv |= (data[1] & 0x3f) << 6;
|
|
uv |= (data[0] & 0x0f) << 12;
|
|
} else {
|
|
uv = data[3] & 0x3f;
|
|
uv |= (data[2] & 0x3f) << 6;
|
|
uv |= (data[1] & 0x3f) << 12;
|
|
uv |= (data[0] & 0x3f) << 18;
|
|
}
|
|
return (uv);
|
|
}
|
|
|
|
void
|
|
utf8_split(u_int uv, u_char data[4])
|
|
{
|
|
memset(data, 0xff, sizeof data);
|
|
|
|
if (uv <= 0x7f)
|
|
data[0] = uv;
|
|
else if (uv > 0x7f && uv <= 0x7ff) {
|
|
data[0] = (uv >> 6) | 0xc0;
|
|
data[1] = (uv & 0x3f) | 0x80;
|
|
} else if (uv > 0x7ff && uv <= 0xffff) {
|
|
data[0] = (uv >> 12) | 0xe0;
|
|
data[1] = ((uv >> 6) & 0x3f) | 0x80;
|
|
data[2] = (uv & 0x3f) | 0x80;
|
|
} else if (uv > 0xffff && uv <= 0x10ffff) {
|
|
data[0] = (uv >> 18) | 0xf0;
|
|
data[1] = ((uv >> 12) & 0x3f) | 0x80;
|
|
data[2] = ((uv >> 6) & 0x3f) | 0x80;
|
|
data[3] = (uv & 0x3f) | 0x80;
|
|
}
|
|
}
|
|
|
|
int
|
|
utf8_width(u_int uv)
|
|
{
|
|
if ((uv >= 0x1100 && uv <= 0x115f) ||
|
|
uv == 0x2329 ||
|
|
uv == 0x232a ||
|
|
(uv >= 0x2e80 && uv <= 0xa4cf && uv != 0x303f) ||
|
|
(uv >= 0xac00 && uv <= 0xd7a3) ||
|
|
(uv >= 0xf900 && uv <= 0xfaff) ||
|
|
(uv >= 0xfe10 && uv <= 0xfe19) ||
|
|
(uv >= 0xfe30 && uv <= 0xfe6f) ||
|
|
(uv >= 0xff00 && uv <= 0xff60) ||
|
|
(uv >= 0xffe0 && uv <= 0xffe6) ||
|
|
(uv >= 0x20000 && uv <= 0x2fffd) ||
|
|
(uv >= 0x30000 && uv <= 0x3fffd))
|
|
return (2);
|
|
return (1);
|
|
}
|