86 lines
4.9 KiB
C
86 lines
4.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/metastat.internal.h"
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#include "libc/dce.h"
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#define SWITCHEROO(S1, S2, A, B, C, D, E, F, G, H, I, J, K, L, M) \
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do { \
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autotype((S2).A) a = (typeof((S2).A))(S1).A; \
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autotype((S2).B) b = (typeof((S2).B))(S1).B; \
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autotype((S2).C) c = (typeof((S2).C))(S1).C; \
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autotype((S2).D) d = (typeof((S2).D))(S1).D; \
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autotype((S2).E) e = (typeof((S2).E))(S1).E; \
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autotype((S2).F) f = (typeof((S2).F))(S1).F; \
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autotype((S2).G) g = (typeof((S2).G))(S1).G; \
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autotype((S2).H) h = (typeof((S2).H))(S1).H; \
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autotype((S2).I) i = (typeof((S2).I))(S1).I; \
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autotype((S2).J) j = (typeof((S2).J))(S1).J; \
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autotype((S2).K) k = (typeof((S2).K))(S1).K; \
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autotype((S2).L) l = (typeof((S2).L))(S1).L; \
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autotype((S2).M) m = (typeof((S2).M))(S1).M; \
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(S2).A = a; \
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(S2).B = b; \
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(S2).C = c; \
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(S2).D = d; \
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(S2).E = e; \
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(S2).F = f; \
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(S2).G = g; \
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(S2).H = h; \
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(S2).I = i; \
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(S2).J = j; \
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(S2).K = k; \
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(S2).L = l; \
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(S2).M = m; \
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} while (0);
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forceinline void stat2linux_xnu(union metastat *ms) {
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SWITCHEROO(ms->xnu, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
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st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
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st_ctim);
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}
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forceinline void stat2linux_freebsd(union metastat *ms) {
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SWITCHEROO(ms->freebsd, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
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st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
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st_ctim);
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}
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forceinline void stat2linux_openbsd(union metastat *ms) {
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SWITCHEROO(ms->openbsd, ms->linux, st_dev, st_ino, st_nlink, st_mode, st_uid,
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st_gid, st_rdev, st_size, st_blksize, st_blocks, st_atim, st_mtim,
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st_ctim);
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}
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/**
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* Transcodes “The Dismal Data Structure” from BSD→Linux ABI.
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* @asyncsignalsafe
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*/
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textstartup void stat2linux(void *ms) {
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if (ms) {
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if (SupportsXnu() && IsXnu()) {
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stat2linux_xnu((union metastat *)ms);
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} else if (SupportsFreebsd() && IsFreebsd()) {
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stat2linux_freebsd((union metastat *)ms);
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} else if (SupportsOpenbsd() && IsOpenbsd()) {
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stat2linux_openbsd((union metastat *)ms);
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}
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}
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}
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