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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable enable
namespace System.Buffers.Text
{
public static partial class Utf8Formatter
{
// Rfc1123 - lowercase
//
// 01234567890123456789012345678
// -----------------------------
// tue, 03 jan 2017 08:08:05 gmt
//
private static bool TryFormatDateTimeL(DateTime value, Span<byte> destination, out int bytesWritten)
{
// Writing the check in this fashion elides all bounds checks on 'buffer'
// for the remainder of the method.
if ((uint)28 >= (uint)destination.Length)
{
bytesWritten = 0;
return false;
}
uint dayAbbrev = s_dayAbbreviationsLowercase[(int)value.DayOfWeek];
destination[0] = (byte)dayAbbrev;
dayAbbrev >>= 8;
destination[1] = (byte)dayAbbrev;
dayAbbrev >>= 8;
destination[2] = (byte)dayAbbrev;
destination[3] = Utf8Constants.Comma;
destination[4] = Utf8Constants.Space;
FormattingHelpers.WriteTwoDecimalDigits((uint)value.Day, destination, 5);
destination[7] = Utf8Constants.Space;
uint monthAbbrev = s_monthAbbreviationsLowercase[value.Month - 1];
destination[8] = (byte)monthAbbrev;
monthAbbrev >>= 8;
destination[9] = (byte)monthAbbrev;
monthAbbrev >>= 8;
destination[10] = (byte)monthAbbrev;
destination[11] = Utf8Constants.Space;
FormattingHelpers.WriteFourDecimalDigits((uint)value.Year, destination, 12);
destination[16] = Utf8Constants.Space;
FormattingHelpers.WriteTwoDecimalDigits((uint)value.Hour, destination, 17);
destination[19] = Utf8Constants.Colon;
FormattingHelpers.WriteTwoDecimalDigits((uint)value.Minute, destination, 20);
destination[22] = Utf8Constants.Colon;
FormattingHelpers.WriteTwoDecimalDigits((uint)value.Second, destination, 23);
destination[25] = Utf8Constants.Space;
destination[26] = GMT1Lowercase;
destination[27] = GMT2Lowercase;
destination[28] = GMT3Lowercase;
bytesWritten = 29;
return true;
}
}
}
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