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34d7a8fa69
ICU's Islamic calendar implementations always set ERA=0, even for dates before the Hijra (622 CE), using negative year values instead. However, the CLDR defines two eras: "Anno Hegirae" (era 0) and "Before Hijrah" (era 1). ECMA-402 expects distinct era names in formatToParts output. Similarly, ICU's Coptic calendar has an empty CLDR era 0 name, causing the era parts to be omitted entirely from formatted output. This patch adds another icu::Calendar subclass to handle these cases.
23 lines
547 B
C++
23 lines
547 B
C++
/*
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* Copyright (c) 2026, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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namespace Unicode {
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// https://github.com/unicode-org/icu/blob/main/icu4c/source/i18n/gregoimp.h#L127
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constexpr inline i64 EPOCH_START_AS_JULIAN_DAY = 2440588;
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// https://en.wikipedia.org/wiki/Chinese_calendar_correspondence_table
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constexpr inline i32 CHINESE_CALENDAR_FIRST_YEAR = -2637;
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// https://en.wikipedia.org/wiki/Dangun_calendar
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constexpr inline i32 DANGI_CALENDAR_FIRST_YEAR = -2333;
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}
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