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1 //===- llvm/unittest/Support/TimeValueTest.cpp - Time Value tests ---------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "gtest/gtest.h"
11 #include "llvm/Support/TimeValue.h"
12 #include <time.h>
13 
14 using namespace llvm;
15 namespace {
16 
TEST(TimeValue,time_t)17 TEST(TimeValue, time_t) {
18   sys::TimeValue now = sys::TimeValue::now();
19   time_t now_t = time(nullptr);
20   EXPECT_TRUE(std::abs(static_cast<long>(now_t - now.toEpochTime())) < 2);
21 }
22 
TEST(TimeValue,Win32FILETIME)23 TEST(TimeValue, Win32FILETIME) {
24   uint64_t epoch_as_filetime = 0x19DB1DED53E8000ULL;
25   uint32_t ns = 765432100;
26   sys::TimeValue epoch;
27 
28   // FILETIME has 100ns of intervals.
29   uint64_t ft1970 = epoch_as_filetime + ns / 100;
30   epoch.fromWin32Time(ft1970);
31 
32   // The "seconds" part in Posix time may be expected as zero.
33   EXPECT_EQ(0u, epoch.toEpochTime());
34   EXPECT_EQ(ns, static_cast<uint32_t>(epoch.nanoseconds()));
35 
36   // Confirm it reversible.
37   EXPECT_EQ(ft1970, epoch.toWin32Time());
38 }
39 
40 }
41