7025dd1fa7
Thread UTF-16 string input through JSON, script parsing, Date parsing, Intl option parsing, Temporal parsing, and the helper library boundaries that feed those parsers. Preserve ASCII fast paths where the source data is known to be ASCII.
209 lines
7.6 KiB
C++
209 lines
7.6 KiB
C++
/*
|
||
* Copyright (c) 2026, Tim Flynn <trflynn89@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <LibUnicode/Calendar.h>
|
||
#include <LibUnicode/RustFFI.h>
|
||
|
||
namespace Unicode {
|
||
|
||
// https://tc39.es/proposal-temporal/#prod-MonthCode
|
||
static constexpr bool is_valid_month_code_string(StringView month_code)
|
||
{
|
||
// MonthCode :::
|
||
// M00L
|
||
// M0 NonZeroDigit L[opt]
|
||
// M NonZeroDigit DecimalDigit L[opt]
|
||
auto length = month_code.length();
|
||
|
||
if (length != 3 && length != 4)
|
||
return false;
|
||
|
||
if (month_code[0] != 'M')
|
||
return false;
|
||
|
||
if (!is_ascii_digit(month_code[1]) || !is_ascii_digit(month_code[2]))
|
||
return false;
|
||
|
||
if (length == 3 && month_code[1] == '0' && month_code[2] == '0')
|
||
return false;
|
||
if (length == 4 && month_code[3] != 'L')
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
static constexpr bool is_valid_month_code_string(Utf16View month_code)
|
||
{
|
||
// MonthCode :::
|
||
// M00L
|
||
// M0 NonZeroDigit L[opt]
|
||
// M NonZeroDigit DecimalDigit L[opt]
|
||
auto length = month_code.length_in_code_units();
|
||
|
||
if (length != 3 && length != 4)
|
||
return false;
|
||
|
||
if (month_code.code_unit_at(0) != 'M')
|
||
return false;
|
||
|
||
if (!is_ascii_digit(month_code.code_unit_at(1)) || !is_ascii_digit(month_code.code_unit_at(2)))
|
||
return false;
|
||
|
||
if (length == 3 && month_code.code_unit_at(1) == '0' && month_code.code_unit_at(2) == '0')
|
||
return false;
|
||
if (length == 4 && month_code.code_unit_at(3) != 'L')
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
// 12.2.1 ParseMonthCode ( argument ), https://tc39.es/proposal-temporal/#sec-temporal-parsemonthcode
|
||
Optional<MonthCode> parse_month_code(StringView month_code)
|
||
{
|
||
// 3. If ParseText(StringToCodePoints(monthCode), MonthCode) is a List of errors, throw a RangeError exception.
|
||
if (!is_valid_month_code_string(month_code))
|
||
return {};
|
||
|
||
// 4. Let isLeapMonth be false.
|
||
auto is_leap_month = false;
|
||
|
||
// 5. If the length of monthCode = 4, then
|
||
if (month_code.length() == 4) {
|
||
// a. Assert: The fourth code unit of monthCode is 0x004C (LATIN CAPITAL LETTER L).
|
||
VERIFY(month_code[3] == 'L');
|
||
|
||
// b. Set isLeapMonth to true.
|
||
is_leap_month = true;
|
||
}
|
||
|
||
// 6. Let monthCodeDigits be the substring of monthCode from 1 to 3.
|
||
auto month_code_digits = month_code.substring_view(1, 2);
|
||
|
||
// 7. Let monthNumber be ℝ(StringToNumber(monthCodeDigits)).
|
||
auto month_number = month_code_digits.to_number<u8>().value();
|
||
|
||
// 8. Return the Record { [[MonthNumber]]: monthNumber, [[IsLeapMonth]]: isLeapMonth }.
|
||
return MonthCode { month_number, is_leap_month };
|
||
}
|
||
|
||
// 12.2.1 ParseMonthCode ( argument ), https://tc39.es/proposal-temporal/#sec-temporal-parsemonthcode
|
||
Optional<MonthCode> parse_month_code(Utf16View month_code)
|
||
{
|
||
// 3. If ParseText(StringToCodePoints(monthCode), MonthCode) is a List of errors, throw a RangeError exception.
|
||
if (!is_valid_month_code_string(month_code))
|
||
return {};
|
||
|
||
// 4. Let isLeapMonth be false.
|
||
auto is_leap_month = false;
|
||
|
||
// 5. If the length of monthCode = 4, then
|
||
if (month_code.length_in_code_units() == 4) {
|
||
// a. Assert: The fourth code unit of monthCode is 0x004C (LATIN CAPITAL LETTER L).
|
||
VERIFY(month_code.code_unit_at(3) == 'L');
|
||
|
||
// b. Set isLeapMonth to true.
|
||
is_leap_month = true;
|
||
}
|
||
|
||
// 6. Let monthCodeDigits be the substring of monthCode from 1 to 3.
|
||
|
||
// 7. Let monthNumber be ℝ(StringToNumber(monthCodeDigits)).
|
||
auto month_number = static_cast<u8>((month_code.code_unit_at(1) - '0') * 10 + (month_code.code_unit_at(2) - '0'));
|
||
|
||
// 8. Return the Record { [[MonthNumber]]: monthNumber, [[IsLeapMonth]]: isLeapMonth }.
|
||
return MonthCode { month_number, is_leap_month };
|
||
}
|
||
|
||
// 12.2.2 CreateMonthCode ( monthNumber, isLeapMonth ), https://tc39.es/proposal-temporal/#sec-temporal-createmonthcode
|
||
String create_month_code(u8 month_number, bool is_leap_month)
|
||
{
|
||
// 1. Assert: If isLeapMonth is false, monthNumber > 0.
|
||
if (!is_leap_month)
|
||
VERIFY(month_number > 0);
|
||
|
||
// 2. Let numberPart be ToZeroPaddedDecimalString(monthNumber, 2).
|
||
|
||
// 3. If isLeapMonth is true, then
|
||
if (is_leap_month) {
|
||
// a. Return the string-concatenation of the code unit 0x004D (LATIN CAPITAL LETTER M), numberPart, and the
|
||
// code unit 0x004C (LATIN CAPITAL LETTER L).
|
||
return MUST(String::formatted("M{:02}L", month_number));
|
||
}
|
||
|
||
// 4. Return the string-concatenation of the code unit 0x004D (LATIN CAPITAL LETTER M) and numberPart.
|
||
return MUST(String::formatted("M{:02}", month_number));
|
||
}
|
||
|
||
CalendarDate iso_date_to_calendar_date(String const& calendar, ISODate iso_date)
|
||
{
|
||
auto result = FFI::icu_iso_date_to_calendar_date(calendar.bytes().data(), calendar.bytes().size(), iso_date.year, iso_date.month, iso_date.day);
|
||
|
||
return CalendarDate {
|
||
.era = {},
|
||
.era_year = {},
|
||
.year = result.year,
|
||
.month = result.month,
|
||
.month_code = String::from_utf8_without_validation({ result.month_code, result.month_code_length }),
|
||
.day = result.day,
|
||
.day_of_week = result.day_of_week,
|
||
.day_of_year = result.day_of_year,
|
||
.week_of_year = {},
|
||
.days_in_week = result.days_in_week,
|
||
.days_in_month = result.days_in_month,
|
||
.days_in_year = result.days_in_year,
|
||
.months_in_year = result.months_in_year,
|
||
.in_leap_year = result.in_leap_year,
|
||
};
|
||
}
|
||
|
||
Optional<ISODate> calendar_date_to_iso_date(String const& calendar, i32 year, u8 month, u8 day)
|
||
{
|
||
auto result = FFI::icu_calendar_date_to_iso_date(calendar.bytes().data(), calendar.bytes().size(), year, month, day);
|
||
if (!result.has_value)
|
||
return {};
|
||
|
||
return ISODate { result.iso_date.year, result.iso_date.month, result.iso_date.day };
|
||
}
|
||
|
||
Optional<ISODate> iso_year_and_month_code_to_iso_date(String const& calendar, i32 year, StringView month_code, u8 day)
|
||
{
|
||
auto result = FFI::icu_iso_year_and_month_code_to_iso_date(calendar.bytes().data(), calendar.bytes().size(), year, month_code.bytes().data(), month_code.length(), day);
|
||
if (!result.has_value)
|
||
return {};
|
||
|
||
return ISODate { result.iso_date.year, result.iso_date.month, result.iso_date.day };
|
||
}
|
||
|
||
Optional<ISODate> calendar_year_and_month_code_to_iso_date(String const& calendar, i32 arithmetic_year, StringView month_code, u8 day)
|
||
{
|
||
auto result = FFI::icu_calendar_year_and_month_code_to_iso_date(calendar.bytes().data(), calendar.bytes().size(), arithmetic_year, month_code.bytes().data(), month_code.length(), day);
|
||
if (!result.has_value)
|
||
return {};
|
||
|
||
return ISODate { result.iso_date.year, result.iso_date.month, result.iso_date.day };
|
||
}
|
||
|
||
u8 calendar_months_in_year(String const& calendar, i32 arithmetic_year)
|
||
{
|
||
return FFI::icu_calendar_months_in_year(calendar.bytes().data(), calendar.bytes().size(), arithmetic_year);
|
||
}
|
||
|
||
u8 calendar_days_in_month(String const& calendar, i32 arithmetic_year, u8 ordinal_month)
|
||
{
|
||
return FFI::icu_calendar_days_in_month(calendar.bytes().data(), calendar.bytes().size(), arithmetic_year, ordinal_month);
|
||
}
|
||
|
||
u8 calendar_max_days_in_month_code(String const& calendar, StringView month_code)
|
||
{
|
||
return FFI::icu_calendar_max_days_in_month_code(calendar.bytes().data(), calendar.bytes().size(), month_code.bytes().data(), month_code.length());
|
||
}
|
||
|
||
bool calendar_year_contains_month_code(String const& calendar, i32 arithmetic_year, StringView month_code)
|
||
{
|
||
return FFI::icu_year_contains_month_code(calendar.bytes().data(), calendar.bytes().size(), arithmetic_year, month_code.bytes().data(), month_code.length());
|
||
}
|
||
|
||
}
|