mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
c843243322
- Support deterministic stacks on OpenBSD - Support OpenBSD system call origin verification - Fix overrun by one in chibicc string token allocator - Get all chibicc tests passing under Address Sanitizer
60 lines
2.9 KiB
C
60 lines
2.9 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/str/oldutf16.internal.h"
|
|
#include "libc/str/str.h"
|
|
|
|
/* TODO(jart): DELETE */
|
|
|
|
/**
|
|
* Encodes character to string as UTF-16.
|
|
*
|
|
* Implementation Details: The header macro should ensure this function
|
|
* is only called for truly huge codepoints. Plus this function makes a
|
|
* promise to not clobber any registers but %rax.
|
|
*
|
|
* @param s is what ch gets encoded to
|
|
* @param size is the number of shorts available in s
|
|
* @param awesome enables numbers the IETF unilaterally banned
|
|
* @return number of shorts written or -1 w/ errno
|
|
* @todo delete
|
|
*/
|
|
int(pututf16)(char16_t *s, size_t size, wint_t wc, bool awesome) {
|
|
wint_t wc2;
|
|
if (size) {
|
|
if ((0 <= wc && wc < 32) && awesome && size >= 2) {
|
|
s[0] = 0xd800;
|
|
s[1] = 0xdc00 | wc;
|
|
return 2;
|
|
}
|
|
if ((0 <= wc && wc <= 0xD7FF) || (0xE000 <= wc && wc <= 0xFFFF)) {
|
|
s[0] = wc;
|
|
return 1;
|
|
} else if (0x10000 <= wc && wc <= 0x10FFFF && size >= 2) {
|
|
wc2 = wc - 0x10000;
|
|
s[0] = (wc2 >> 10) + 0xd800;
|
|
s[1] = (wc2 & 1023) + 0xdc00;
|
|
return 2;
|
|
} else {
|
|
s[0] = INVALID_CODEPOINT;
|
|
return -1;
|
|
}
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|