33 lines
2.3 KiB
C
33 lines
2.3 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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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/conv/conv.h"
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#include "libc/nt/struct/filetime.h"
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/**
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* Converts Windows COBOL timestamp to UNIX epoch in nanoseconds.
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*/
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void filetimetotimespec(struct timespec *ts, struct NtFileTime ft) {
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uint64_t t = (uint64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime;
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uint64_t x = t - MODERNITYSECONDS * HECTONANOSECONDS;
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ts->tv_sec = x / HECTONANOSECONDS;
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ts->tv_nsec = x % HECTONANOSECONDS * 100;
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}
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