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/*-*- 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/calls/internal.h"
#include "libc/calls/struct/metastat.internal.h"
#include "libc/dce.h"
#define SWITCHEROO(S1, S2, A, B, C, D, E, F, G, H, I, J, K, L, M) \
do { \
autotype((S2).A) a = (typeof((S2).A))(S1).A; \
autotype((S2).B) b = (typeof((S2).B))(S1).B; \
autotype((S2).C) c = (typeof((S2).C))(S1).C; \
autotype((S2).D) d = (typeof((S2).D))(S1).D; \
autotype((S2).E) e = (typeof((S2).E))(S1).E; \
autotype((S2).F) f = (typeof((S2).F))(S1).F; \
autotype((S2).G) g = (typeof((S2).G))(S1).G; \
autotype((S2).H) h = (typeof((S2).H))(S1).H; \
autotype((S2).I) i = (typeof((S2).I))(S1).I; \
autotype((S2).J) j = (typeof((S2).J))(S1).J; \
autotype((S2).K) k = (typeof((S2).K))(S1).K; \
autotype((S2).L) l = (typeof((S2).L))(S1).L; \
autotype((S2).M) m = (typeof((S2).M))(S1).M; \
(S2).A = a; \
(S2).B = b; \
(S2).C = c; \
(S2).D = d; \
(S2).E = e; \
(S2).F = f; \
(S2).G = g; \
(S2).H = h; \
(S2).I = i; \
(S2).J = j; \
(S2).K = k; \
(S2).L = l; \
(S2).M = m; \
} while (0);
forceinline void stat2linux_xnu(union metastat *ms) {
SWITCHEROO(ms->xnu, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
st_ctim);
}
forceinline void stat2linux_freebsd(union metastat *ms) {
SWITCHEROO(ms->freebsd, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
st_ctim);
}
forceinline void stat2linux_openbsd(union metastat *ms) {
SWITCHEROO(ms->openbsd, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
st_ctim);
}
/**
* Transcodes “The Dismal Data Structure” from BSD→Linux ABI.
* @asyncsignalsafe
*/
textstartup void stat2linux(void *ms) {
if (ms) {
if (SupportsXnu() && IsXnu()) {
stat2linux_xnu((union metastat *)ms);
} else if (SupportsFreebsd() && IsFreebsd()) {
stat2linux_freebsd((union metastat *)ms);
} else if (SupportsOpenbsd() && IsOpenbsd()) {
stat2linux_openbsd((union metastat *)ms);
}
}
}