mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
59 lines
3.1 KiB
C
59 lines
3.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or 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 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 "libc/intrin/likely.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/str/unicode.h"
|
|
|
|
extern const uint8_t kEastAsianWidth[];
|
|
extern const uint32_t kEastAsianWidthBits;
|
|
extern const uint8_t kCombiningChars[];
|
|
extern const uint32_t kCombiningCharsBits;
|
|
|
|
/**
|
|
* Returns cell width of monospace character.
|
|
*/
|
|
int wcwidth(wchar_t c) {
|
|
#ifdef __x86_64__
|
|
if (LIKELY(32 <= c && c < 127)) {
|
|
return 1;
|
|
} else if (!c) {
|
|
return 0;
|
|
} else if ((0 < c && c < 32) || (0x7f <= c && c < 0xA0)) {
|
|
return -1;
|
|
} else if ((0 <= c && c < kCombiningCharsBits) &&
|
|
!!(kCombiningChars[c >> 3] & (1 << (c & 7)))) {
|
|
return 0;
|
|
} else if (0 <= c && c < kEastAsianWidthBits) {
|
|
return 1 + !!(kEastAsianWidth[c >> 3] & (1 << (c & 7)));
|
|
} else {
|
|
return 1;
|
|
}
|
|
#else
|
|
if (!c) return 0;
|
|
if (c < 0 || iswcntrl(c)) return -1;
|
|
return 1 +
|
|
(c >= 0x1100 &&
|
|
(c <= 0x115f || c == 0x2329 || c == 0x232a ||
|
|
(c >= 0x2e80 && c <= 0xa4cf && c != 0x303f) ||
|
|
(c >= 0xac00 && c <= 0xd7a3) || (c >= 0xf900 && c <= 0xfaff) ||
|
|
(c >= 0xfe10 && c <= 0xfe19) || (c >= 0xfe30 && c <= 0xfe6f) ||
|
|
(c >= 0xff00 && c <= 0xff60) || (c >= 0xffe0 && c <= 0xffe6) ||
|
|
(c >= 0x20000 && c <= 0x2fffd) || (c >= 0x30000 && c <= 0x3fffd)));
|
|
#endif
|
|
}
|