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https://github.com/RGBCube/serenity
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c303bbde54
...and ten required AOs we didn't have yet: - BalanceISODate - BalanceISODateTime - BalanceISOYearMonth - BalanceTime - BuiltinTimeZoneGetPlainDateTimeFor - GetISOPartsFromEpoch - GetOffsetNanosecondsFor - ParseTemporalTimeZone - SystemDateTime - ToTemporalTimeZone
26 lines
731 B
C++
26 lines
731 B
C++
/*
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Temporal/PlainYearMonth.h>
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namespace JS::Temporal {
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// 9.5.5 BalanceISOYearMonth ( year, month ), https://tc39.es/proposal-temporal/#sec-temporal-balanceisoyearmonth
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ISOYearMonth balance_iso_year_month(i32 year, i32 month)
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{
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// 1. Assert: year and month are integers.
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// 2. Set year to year + floor((month - 1) / 12).
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year += (month - 1) / 12;
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// 3. Set month to (month − 1) modulo 12 + 1.
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month = (month - 1) % 12 + 1;
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// 4. Return the new Record { [[Year]]: year, [[Month]]: month }.
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return ISOYearMonth { .year = year, .month = static_cast<u8>(month) };
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}
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}
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