//===-- Unittests for gmtime ----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/__support/CPP/limits.h" // INT_MAX, INT_MIN
#include "src/errno/libc_errno.h"
#include "src/time/gmtime.h"
#include "src/time/time_utils.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
#include "test/src/time/TmMatcher.h"
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
using LIBC_NAMESPACE::time_utils::TimeConstants;
TEST(LlvmLibcGmTime, OutOfRange) {
if (sizeof(time_t) < sizeof(int64_t))
return;
time_t seconds =
1 + INT_MAX * static_cast<int64_t>(
TimeConstants::NUMBER_OF_SECONDS_IN_LEAP_YEAR);
struct tm *tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TRUE(tm_data == nullptr);
ASSERT_ERRNO_EQ(EOVERFLOW);
LIBC_NAMESPACE::libc_errno = 0;
seconds = INT_MIN * static_cast<int64_t>(
TimeConstants::NUMBER_OF_SECONDS_IN_LEAP_YEAR) -
1;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TRUE(tm_data == nullptr);
ASSERT_ERRNO_EQ(EOVERFLOW);
}
TEST(LlvmLibcGmTime, InvalidSeconds) {
time_t seconds = 0;
struct tm *tm_data = nullptr;
// -1 second from 1970-01-01 00:00:00 returns 1969-12-31 23:59:59.
seconds = -1;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{59, // sec
59, // min
23, // hr
31, // day
12 - 1, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
364, // yday
0}),
*tm_data);
// 60 seconds from 1970-01-01 00:00:00 returns 1970-01-01 00:01:00.
seconds = 60;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
1, // min
0, // hr
1, // day
0, // tm_mon starts with 0 for Jan
1970 - TimeConstants::TIME_YEAR_BASE, // year
4, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, InvalidMinutes) {
time_t seconds = 0;
struct tm *tm_data = nullptr;
// -1 minute from 1970-01-01 00:00:00 returns 1969-12-31 23:59:00.
seconds = -TimeConstants::SECONDS_PER_MIN;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
59, // min
23, // hr
31, // day
11, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
0, // yday
0}),
*tm_data);
// 60 minutes from 1970-01-01 00:00:00 returns 1970-01-01 01:00:00.
seconds = 60 * TimeConstants::SECONDS_PER_MIN;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
1, // hr
1, // day
0, // tm_mon starts with 0 for Jan
1970 - TimeConstants::TIME_YEAR_BASE, // year
4, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, InvalidHours) {
time_t seconds = 0;
struct tm *tm_data = nullptr;
// -1 hour from 1970-01-01 00:00:00 returns 1969-12-31 23:00:00.
seconds = -TimeConstants::SECONDS_PER_HOUR;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
23, // hr
31, // day
11, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
0, // yday
0}),
*tm_data);
// 24 hours from 1970-01-01 00:00:00 returns 1970-01-02 00:00:00.
seconds = 24 * TimeConstants::SECONDS_PER_HOUR;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
2, // day
0, // tm_mon starts with 0 for Jan
1970 - TimeConstants::TIME_YEAR_BASE, // year
5, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, InvalidYear) {
// -1 year from 1970-01-01 00:00:00 returns 1969-01-01 00:00:00.
time_t seconds =
-TimeConstants::DAYS_PER_NON_LEAP_YEAR * TimeConstants::SECONDS_PER_DAY;
struct tm *tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
0, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, InvalidMonths) {
time_t seconds = 0;
struct tm *tm_data = nullptr;
// -1 month from 1970-01-01 00:00:00 returns 1969-12-01 00:00:00.
seconds = -31 * TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
12 - 1, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
1, // wday
0, // yday
0}),
*tm_data);
// 1970-13-01 00:00:00 returns 1971-01-01 00:00:00.
seconds =
TimeConstants::DAYS_PER_NON_LEAP_YEAR * TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
0, // tm_mon starts with 0 for Jan
1971 - TimeConstants::TIME_YEAR_BASE, // year
5, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, InvalidDays) {
time_t seconds = 0;
struct tm *tm_data = nullptr;
// -1 day from 1970-01-01 00:00:00 returns 1969-12-31 00:00:00.
seconds = -1 * TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
31, // day
11, // tm_mon starts with 0 for Jan
1969 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
0, // yday
0}),
*tm_data);
// 1970-01-32 00:00:00 returns 1970-02-01 00:00:00.
seconds = 31 * TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
0, // tm_mon starts with 0 for Jan
1970 - TimeConstants::TIME_YEAR_BASE, // year
0, // wday
0, // yday
0}),
*tm_data);
// 1970-02-29 00:00:00 returns 1970-03-01 00:00:00.
seconds = 59 * TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
2, // tm_mon starts with 0 for Jan
1970 - TimeConstants::TIME_YEAR_BASE, // year
0, // wday
0, // yday
0}),
*tm_data);
// 1972-02-30 00:00:00 returns 1972-03-01 00:00:00.
seconds = ((2 * TimeConstants::DAYS_PER_NON_LEAP_YEAR) + 60) *
TimeConstants::SECONDS_PER_DAY;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{0, // sec
0, // min
0, // hr
1, // day
2, // tm_mon starts with 0 for Jan
1972 - TimeConstants::TIME_YEAR_BASE, // year
3, // wday
0, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, EndOf32BitEpochYear) {
// Test for maximum value of a signed 32-bit integer.
// Test implementation can encode time for Tue 19 January 2038 03:14:07 UTC.
time_t seconds = 0x7FFFFFFF;
struct tm *tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{7, // sec
14, // min
3, // hr
19, // day
0, // tm_mon starts with 0 for Jan
2038 - TimeConstants::TIME_YEAR_BASE, // year
2, // wday
7, // yday
0}),
*tm_data);
}
TEST(LlvmLibcGmTime, Max64BitYear) {
if (sizeof(time_t) == 4)
return;
// Mon Jan 1 12:50:50 2170 (200 years from 1970),
time_t seconds = 6311479850;
struct tm *tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{50, // sec
50, // min
12, // hr
1, // day
0, // tm_mon starts with 0 for Jan
2170 - TimeConstants::TIME_YEAR_BASE, // year
1, // wday
50, // yday
0}),
*tm_data);
// Test for Tue Jan 1 12:50:50 in 2,147,483,647th year.
seconds = 67767976202043050;
tm_data = LIBC_NAMESPACE::gmtime(&seconds);
EXPECT_TM_EQ((tm{50, // sec
50, // min
12, // hr
1, // day
0, // tm_mon starts with 0 for Jan
2147483647 - TimeConstants::TIME_YEAR_BASE, // year
2, // wday
50, // yday
0}),
*tm_data);
}
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