mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-18 11:32:41 +00:00
b0df6c1fce
Cosmopolitan now supports 104 time zones. They're embedded inside any binary that links the localtime() function. Doing so adds about 100kb to the binary size. This change also gets time zones working properly on Windows for the first time. It's not needed to have /etc/localtime exist on Windows, since we can get this information from WIN32. We're also now updated to the latest version of Paul Eggert's TZ library.
81 lines
3.6 KiB
C
81 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 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/asan.internal.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/time.h"
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static int sys_clock_getres_poly(int clock, struct timespec *ts, int64_t real,
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int64_t real_coarse, int64_t boot) {
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ts->tv_sec = 0;
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if (clock == CLOCK_REALTIME) {
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ts->tv_nsec = real;
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return 0;
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} else if (clock == CLOCK_REALTIME_COARSE) {
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ts->tv_nsec = real_coarse;
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return 0;
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} else if (clock == CLOCK_MONOTONIC) {
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ts->tv_nsec = 10;
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return 0;
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} else if (clock == CLOCK_BOOTTIME) {
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ts->tv_nsec = boot;
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return 0;
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} else {
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return einval();
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}
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}
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static int sys_clock_getres_nt(int clock, struct timespec *ts) {
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return sys_clock_getres_poly(clock, ts, 100, 1000000, 1000000);
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}
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static int sys_clock_getres_xnu(int clock, struct timespec *ts) {
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return sys_clock_getres_poly(clock, ts, 1000, 1000, 1000);
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}
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/**
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* Returns granularity of clock.
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*
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* @return 0 on success, or -1 w/ errno
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* @error EPERM if pledge() is in play without stdio promise
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* @error EINVAL if `clock` isn't supported on this system
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* @error EFAULT if `ts` points to bad memory
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*/
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int clock_getres(int clock, struct timespec *ts) {
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int rc;
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if (!ts || (IsAsan() && !__asan_is_valid_timespec(ts))) {
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rc = efault();
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} else if (clock == 127) {
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rc = einval(); // 127 is used by consts.sh to mean unsupported
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} else if (IsWindows()) {
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rc = sys_clock_getres_nt(clock, ts);
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} else if (IsXnu()) {
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rc = sys_clock_getres_xnu(clock, ts);
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} else {
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rc = sys_clock_getres(clock, ts);
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}
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STRACE("clock_getres(%s, [%s]) → %d% m", DescribeClockName(clock),
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DescribeTimespec(rc, ts), rc);
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return rc;
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}
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