private void InternalCopyRationalValues <TDest>(ReadOnlySpan <byte> buffer, Span <TDest> values, Func <TiffRational, TDest>?convertFunc = null) where TDest : struct
{
ReadOnlySpan <byte> src = buffer.Slice(0, 8 * values.Length);
bool reverseEndianNeeded = _reverseEndianNeeded;
if (typeof(TDest) == typeof(TiffRational) && convertFunc is null)
{
Span <TiffRational> dest = MemoryMarshal.Cast <TDest, TiffRational>(values);
for (int i = 0; i < values.Length; i++)
{
uint numerator = MemoryMarshal.Read <uint>(src);
uint denominator = MemoryMarshal.Read <uint>(src.Slice(4));
if (reverseEndianNeeded)
{
numerator = BinaryPrimitives.ReverseEndianness(numerator);
denominator = BinaryPrimitives.ReverseEndianness(denominator);
}
dest[i] = new TiffRational(numerator, denominator);
src = src.Slice(8);
}
}
else if (typeof(TDest) == typeof(TiffSRational) && convertFunc is null)
{
Span <TiffSRational> dest = MemoryMarshal.Cast <TDest, TiffSRational>(values);
for (int i = 0; i < values.Length; i++)
{
int numerator = MemoryMarshal.Read <int>(src);
int denominator = MemoryMarshal.Read <int>(src.Slice(4));
if (reverseEndianNeeded)
{
numerator = BinaryPrimitives.ReverseEndianness(numerator);
denominator = BinaryPrimitives.ReverseEndianness(denominator);
}
dest[i] = new TiffSRational(numerator, denominator);
src = src.Slice(8);
}
}
else
{
if (convertFunc is null)
{
throw new ArgumentNullException(nameof(convertFunc));
}
for (int i = 0; i < values.Length; i++)
{
uint numerator = MemoryMarshal.Read <uint>(src);
uint denominator = MemoryMarshal.Read <uint>(src.Slice(4));
if (reverseEndianNeeded)
{
numerator = BinaryPrimitives.ReverseEndianness(numerator);
denominator = BinaryPrimitives.ReverseEndianness(denominator);
}
values[i] = convertFunc(new TiffRational(numerator, denominator));
src = src.Slice(8);
}
}
}
/// <inheritdoc />
public bool Equals(TiffRational other)
{
return(Numerator == other.Numerator && Denominator == other.Denominator);
}