b816037739
This is Abstract Operation is required for the majority of InstantConstructor's and InstantPrototype's methods. The implementation is not entirely complete, (specifically 2 of the underlying required abstract operations, ParseTemporalTimeZoneString and ParseISODateTime are missing the required lexing, and as such are TODO()-ed) but the majority of it is done.
57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@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/Calendar.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS::Temporal {
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// 12.1.30 IsISOLeapYear ( year ), https://tc39.es/proposal-temporal/#sec-temporal-isisoleapyear
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bool is_iso_leap_year(i32 year)
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{
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// 1. Assert: year is an integer.
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// 2. If year modulo 4 ≠ 0, return false.
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if (year % 4 != 0)
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return false;
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// 3. If year modulo 400 = 0, return true.
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if (year % 400 == 0)
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return true;
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// 4. If year modulo 100 = 0, return false.
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if (year % 100 == 0)
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return false;
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// 5. Return true.
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return true;
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}
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// 12.1.32 ISODaysInMonth ( year, month ), https://tc39.es/proposal-temporal/#sec-temporal-isodaysinmonth
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i32 iso_days_in_month(i32 year, i32 month)
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{
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// 1. Assert: year is an integer.
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// 2. Assert: month is an integer, month ≥ 1, and month ≤ 12.
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VERIFY(month >= 1 && month <= 12);
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// 3. If month is 1, 3, 5, 7, 8, 10, or 12, return 31.
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if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12)
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return 31;
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// 4. If month is 4, 6, 9, or 11, return 30.
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if (month == 4 || month == 6 || month == 9 || month == 11)
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return 30;
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// 5. If ! IsISOLeapYear(year) is true, return 29.
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if (is_iso_leap_year(year))
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return 29;
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// 6. Return 28.
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return 28;
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}
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}
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