81 lines
3.3 KiB
C
81 lines
3.3 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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│ 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/struct/timespec.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/mem/mem.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/time/struct/tm.h"
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#include "libc/time/time.h"
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#include "libc/x/x.h"
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STATIC_YOINK("stoa");
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STATIC_YOINK("ntoa");
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/**
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* @fileoverview Timestamps in One True Format w/o toil.
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*/
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static char *xiso8601$impl(struct timespec *opt_ts, int sswidth) {
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char *p;
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struct tm tm;
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struct timespec ts;
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int64_t sec, subsec;
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char timebuf[64], zonebuf[8];
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if (opt_ts) {
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sec = opt_ts->tv_sec;
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subsec = opt_ts->tv_nsec;
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} else {
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errno = 0;
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clock_gettime(CLOCK_REALTIME, &ts);
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sec = ts.tv_sec;
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subsec = ts.tv_nsec;
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sswidth = 9;
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if (errno == ENOSYS) {
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subsec /= 1000;
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sswidth = 6;
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}
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}
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if (IsWindows() && sswidth == 9) {
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subsec /= 100;
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sswidth = 7; /* windows nt uses hectonanoseconds */
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}
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localtime_r(&sec, &tm);
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strftime(timebuf, sizeof(timebuf), "%Y-%m-%dT%H:%M:%S", &tm);
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strftime(zonebuf, sizeof(zonebuf), "%z", &tm);
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(asprintf)(&p, "%s.%0*ld%s", timebuf, sswidth, subsec, zonebuf);
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return p;
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}
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/**
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* Returns allocated string representation of nanosecond timestamp.
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*/
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char *xiso8601ts(struct timespec *opt_ts) {
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return xiso8601$impl(opt_ts, 9);
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}
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/**
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* Returns allocated string representation of microsecond timestamp.
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*/
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char *xiso8601tv(struct timeval *opt_tv) {
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return xiso8601$impl(
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opt_tv ? &(struct timespec){opt_tv->tv_sec, opt_tv->tv_usec} : NULL, 6);
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}
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