1//===-- Unittests for gmtime_r --------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/time/gmtime_r.h"
10#include "src/time/time_constants.h"
11#include "test/UnitTest/Test.h"
12#include "test/src/time/TmMatcher.h"
13
14// gmtime and gmtime_r share the same code and thus didn't repeat all the tests
15// from gmtime. Added couple of validation tests.
16TEST(LlvmLibcGmTimeR, EndOf32BitEpochYear) {
17 // Test for maximum value of a signed 32-bit integer.
18 // Test implementation can encode time for Tue 19 January 2038 03:14:07 UTC.
19 time_t seconds = 0x7FFFFFFF;
20 struct tm tm_data;
21 struct tm *tm_data_ptr;
22 tm_data_ptr = LIBC_NAMESPACE::gmtime_r(&seconds, &tm_data);
23 EXPECT_TM_EQ(
24 (tm{7, // sec
25 14, // min
26 3, // hr
27 19, // day
28 0, // tm_mon starts with 0 for Jan
29 2038 - LIBC_NAMESPACE::time_constants::TIME_YEAR_BASE, // year
30 2, // wday
31 7, // yday
32 0}),
33 *tm_data_ptr);
34 EXPECT_TM_EQ(*tm_data_ptr, tm_data);
35}
36
37TEST(LlvmLibcGmTimeR, Max64BitYear) {
38 if (sizeof(time_t) == 4)
39 return;
40 // Test for Tue Jan 1 12:50:50 in 2,147,483,647th year.
41 time_t seconds = 67767976202043050;
42 struct tm tm_data;
43 struct tm *tm_data_ptr;
44 tm_data_ptr = LIBC_NAMESPACE::gmtime_r(&seconds, &tm_data);
45 EXPECT_TM_EQ(
46 (tm{50, // sec
47 50, // min
48 12, // hr
49 1, // day
50 0, // tm_mon starts with 0 for Jan
51 2147483647 - LIBC_NAMESPACE::time_constants::TIME_YEAR_BASE, // year
52 2, // wday
53 50, // yday
54 0}),
55 *tm_data_ptr);
56 EXPECT_TM_EQ(*tm_data_ptr, tm_data);
57}
58

source code of libc/test/src/time/gmtime_r_test.cpp