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LibJS: Basic implementation of most of Date's constructor arguments
The constructor with a string argument isn't implemented yet, but this implements the other variants. The timestamp constructor doens't handle negative timestamps correctly. Out-of-bound and invalid arguments aren't handled correctly.
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2 changed files with 83 additions and 6 deletions
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@ -60,13 +60,48 @@ Value DateConstructor::call(Interpreter& interpreter)
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return js_string(interpreter, static_cast<Date&>(date.as_object()).string());
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}
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Value DateConstructor::construct(Interpreter&, Function&)
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Value DateConstructor::construct(Interpreter& interpreter, Function&)
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{
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// TODO: Support args
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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auto datetime = Core::DateTime::now();
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auto milliseconds = static_cast<u16>(tv.tv_usec / 1000);
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if (interpreter.argument_count() == 0) {
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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auto datetime = Core::DateTime::now();
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auto milliseconds = static_cast<u16>(tv.tv_usec / 1000);
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return Date::create(global_object(), datetime, milliseconds);
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}
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if (interpreter.argument_count() == 1 && interpreter.argument(0).is_string()) {
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// FIXME: Parse simplified ISO8601-like string, like Date.parse() will do.
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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auto datetime = Core::DateTime::now();
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auto milliseconds = static_cast<u16>(tv.tv_usec / 1000);
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return Date::create(global_object(), datetime, milliseconds);
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}
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if (interpreter.argument_count() == 1) {
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// A timestamp since the epoch, in UTC.
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// FIXME: Date() probably should use a double as internal representation, so that NaN arguments and larger offsets are handled correctly.
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// FIXME: DateTime::from_timestamp() seems to not support negative offsets.
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double value = interpreter.argument(0).to_double(interpreter);
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auto datetime = Core::DateTime::from_timestamp(static_cast<time_t>(value / 1000));
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auto milliseconds = static_cast<u16>(fmod(value, 1000));
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return Date::create(global_object(), datetime, milliseconds);
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}
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// A date/time in components, in local time.
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// FIXME: This doesn't construct an "Invalid Date" object if one of the parameters is NaN.
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// FIXME: This doesn't range-check args and convert months > 12 to year increments etc.
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auto arg_or = [&interpreter](size_t i, i32 fallback) { return interpreter.argument_count() > i ? interpreter.argument(i).to_i32(interpreter) : fallback; };
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int year = interpreter.argument(0).to_i32(interpreter);
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int month_index = interpreter.argument(1).to_i32(interpreter);
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int day = arg_or(2, 1);
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int hours = arg_or(3, 0);
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int minutes = arg_or(4, 0);
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int seconds = arg_or(5, 0);
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int milliseconds = arg_or(6, 0);
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if (year >= 0 && year <= 99)
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year += 1900;
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int month = month_index + 1;
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auto datetime = Core::DateTime::create(year, month, day, hours, minutes, seconds);
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return Date::create(global_object(), datetime, milliseconds);
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}
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