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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 Utf8Parser
{
private static bool TryParseTimeSpanBigG(ReadOnlySpan<byte> source, out TimeSpan value, out int bytesConsumed)
{
int srcIndex = 0;
byte c = default;
while (srcIndex != source.Length)
{
c = source[srcIndex];
if (!(c == ' ' || c == '\t'))
break;
srcIndex++;
}
if (srcIndex == source.Length)
{
value = default;
bytesConsumed = 0;
return false;
}
bool isNegative = false;
if (c == Utf8Constants.Minus)
{
isNegative = true;
srcIndex++;
if (srcIndex == source.Length)
{
value = default;
bytesConsumed = 0;
return false;
}
}
if (!TryParseUInt32D(source.Slice(srcIndex), out uint days, out int justConsumed))
{
value = default;
bytesConsumed = 0;
return false;
}
srcIndex += justConsumed;
if (srcIndex == source.Length || source[srcIndex++] != Utf8Constants.Colon)
{
value = default;
bytesConsumed = 0;
return false;
}
if (!TryParseUInt32D(source.Slice(srcIndex), out uint hours, out justConsumed))
{
value = default;
bytesConsumed = 0;
return false;
}
srcIndex += justConsumed;
if (srcIndex == source.Length || source[srcIndex++] != Utf8Constants.Colon)
{
value = default;
bytesConsumed = 0;
return false;
}
if (!TryParseUInt32D(source.Slice(srcIndex), out uint minutes, out justConsumed))
{
value = default;
bytesConsumed = 0;
return false;
}
srcIndex += justConsumed;
if (srcIndex == source.Length || source[srcIndex++] != Utf8Constants.Colon)
{
value = default;
bytesConsumed = 0;
return false;
}
if (!TryParseUInt32D(source.Slice(srcIndex), out uint seconds, out justConsumed))
{
value = default;
bytesConsumed = 0;
return false;
}
srcIndex += justConsumed;
if (srcIndex == source.Length || source[srcIndex++] != Utf8Constants.Period)
{
value = default;
bytesConsumed = 0;
return false;
}
if (!TryParseTimeSpanFraction(source.Slice(srcIndex), out uint fraction, out justConsumed))
{
value = default;
bytesConsumed = 0;
return false;
}
srcIndex += justConsumed;
if (!TryCreateTimeSpan(isNegative: isNegative, days: days, hours: hours, minutes: minutes, seconds: seconds, fraction: fraction, out value))
{
value = default;
bytesConsumed = 0;
return false;
}
//
// There cannot legally be a sixth number. If the next character is a period or colon, treat this as a error as it's likely
// to indicate the start of a sixth number. Otherwise, treat as end of parse with data left over.
//
if (srcIndex != source.Length && (source[srcIndex] == Utf8Constants.Period || source[srcIndex] == Utf8Constants.Colon))
{
value = default;
bytesConsumed = 0;
return false;
}
bytesConsumed = srcIndex;
return true;
}
}
}
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