unsafe private static void WriteNumber64(StringBuilder stringBuilder, Number64 value)
{
const int MaxNumberLength = 32;
Span <byte> buffer = stackalloc byte[MaxNumberLength];
if (value.IsInteger)
{
if (!Utf8Formatter.TryFormat(
value: Number64.ToLong(value),
destination: buffer,
bytesWritten: out int bytesWritten))
{
throw new InvalidOperationException($"Failed to write a long.");
}
buffer = buffer.Slice(start: 0, length: bytesWritten);
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append((char)buffer[i]);
}
}
else
{
// Until we move to Core 3.0 we have to call ToString(),
// since neither G with precision nor R are supported for Utf8Formatter.
stringBuilder.Append(value.ToString("R", CultureInfo.InvariantCulture));
}
}
