cosmopolitan/libc/intrin/bswap.c
Jōshin e16a7d8f3b
flip et / noet in modelines
`et` means `expandtab`.

```sh
rg 'vi: .* :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\)  :vi/vi: \1 xoet\2:vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2  :vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/'
```
2023-12-07 22:17:11 -05:00

47 lines
2.7 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 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/bswap.h"
#include "libc/intrin/newbie.h"
#include "libc/sock/sock.h"
uint16_t(bswap_16)(uint16_t x) {
return (0x00ff & x) << 010 | (0xff00 & x) >> 010;
}
__strong_reference(bswap_16, ntohs);
__strong_reference(bswap_16, htons);
uint32_t(bswap_32)(uint32_t x) {
return (0x000000ffu & x) << 030 | (0x0000ff00u & x) << 010 |
(0x00ff0000u & x) >> 010 | (0xff000000u & x) >> 030;
}
__strong_reference(bswap_32, ntohl);
__strong_reference(bswap_32, htonl);
uint64_t(bswap_64)(uint64_t x) {
return (0x00000000000000ffull & x) << 070 |
(0x000000000000ff00ull & x) << 050 |
(0x0000000000ff0000ull & x) << 030 |
(0x00000000ff000000ull & x) << 010 |
(0x000000ff00000000ull & x) >> 010 |
(0x0000ff0000000000ull & x) >> 030 |
(0x00ff000000000000ull & x) >> 050 |
(0xff00000000000000ull & x) >> 070;
}