private static void FormatToRightJustify <TBufferWriter, T>(ref TBufferWriter sb, T arg, int width, StandardFormat format, string argName)
where TBufferWriter : IBufferWriter <byte>
{
if (typeof(T) == typeof(string))
{
var s = Unsafe.As <string>(arg);
int padding = width - s.Length;
if (padding > 0)
{
var paddingSpan = sb.GetSpan(padding);
paddingSpan.Fill(sp);
sb.Advance(padding);
}
ZString.AppendChars(ref sb, s.AsSpan());
}
else
{
Span <byte> s = stackalloc byte[typeof(T).IsValueType ? Unsafe.SizeOf <T>() * 8 : 1024];
if (!Utf8ValueStringBuilder.FormatterCache <T> .TryFormatDelegate(arg, s, out var charsWritten, format))
{
s = stackalloc byte[s.Length * 2];
if (!Utf8ValueStringBuilder.FormatterCache <T> .TryFormatDelegate(arg, s, out charsWritten, format))
{
ExceptionUtil.ThrowArgumentException(argName);
}
}
int padding = width - charsWritten;
if (padding > 0)
{
var paddingSpan = sb.GetSpan(padding);
paddingSpan.Fill(sp);
sb.Advance(padding);
}
var span = sb.GetSpan(charsWritten);
s.CopyTo(span);
sb.Advance(charsWritten);
}
}
/// <summary>
/// Creates a new instance with given format provider.
/// </summary>
public ZStringWriter(IFormatProvider formatProvider) : base(formatProvider)
{
sb = ZString.CreateStringBuilder();
isOpen = true;
}