public static bool TryReadUInt64(ref ReadOnlySpan <byte> remaining, out ulong result, char standardFormat)
{
result = default;
switch (GetTokenType(ref remaining))
{
case JsonTokenType.Number:
if (!Utf8Reader.TryReadUInt64(ref remaining, out result, JsonSerializer.IntFormat.Symbol))
{
return(false);
}
return(true);
case JsonTokenType.String:
remaining = remaining.Slice(1);
if (!Utf8Reader.TryReadUInt64(ref remaining, out result, standardFormat))
{
return(false);
}
if (remaining.Length == 0 || remaining[0] != '"')
{
return(false);
}
remaining = remaining.Slice(1);
return(true);
}
return(false);
}
public static bool TryReadUInt64(ref ReadOnlySpan <byte> remaining, out ulong result, char standardFormat)
{
result = default;
if (standardFormat != '\0')
{
if (!TryReadUtf8Bytes(ref remaining, out var bytes))
{
return(false);
}
return(Utf8Reader.TryReadUInt64(ref bytes, out result, standardFormat));
}
switch (GetTokenType(ref remaining))
{
case EtfTokenType.SmallInteger:
{
//remaining = remaining.Slice(1);
result = remaining[1];
remaining = remaining.Slice(2);
return(true);
}
case EtfTokenType.Integer:
{
remaining = remaining.Slice(1);
int signedResult = BinaryPrimitives.ReadInt32BigEndian(remaining);
if (signedResult < 0)
{
return(false);
}
result = (ulong)signedResult;
remaining = remaining.Slice(4);
return(true);
}
case EtfTokenType.SmallBig:
{
//remaining = remaining.Slice(1);
byte bytes = remaining[1];
bool isPositive = remaining[2] == 0;
remaining = remaining.Slice(3);
return(TryReadUnsignedBigNumber(bytes, isPositive, ref remaining, out result));
}
case EtfTokenType.LargeBig:
{
remaining = remaining.Slice(1);
if (!BinaryPrimitives.TryReadUInt32BigEndian(remaining, out uint bytes))
{
return(false);
}
if (bytes > int.MaxValue)
{
return(false); // TODO: Spans dont allow uint accessors
}
bool isPositive = remaining[4] == 0;
remaining = remaining.Slice(5);
return(TryReadUnsignedBigNumber((int)bytes, isPositive, ref remaining, out result));
}
default:
return(false);
}
}