public static byte[] Reinterpret <TConvertType>(this TConvertType value, byte[] bytes, int start)
where TConvertType : struct
{
if (!TypeIntrospector <TConvertType> .IsPrimitive)
{
ThrowHelpers.ThrowOnlyPrimitivesException <TConvertType>();
}
return(ReinterpretFromPrimitive(value, bytes, start));
}
private static void ReinterpretFromPrimitive <TConvertType>(TConvertType value, Span <byte> bytes, int start = 0)
where TConvertType : unmanaged
{
if (bytes.Length - start < MarshalSizeOf <TConvertType> .SizeOf)
{
ThrowHelpers.ThrowBufferTooSmall <TConvertType>(bytes.Length - start);
}
Unsafe.As <byte, TConvertType>(ref bytes[start]) = value;
}
public static unsafe TConvertType Reinterpret <TConvertType>(this byte[] bytes, int start)
where TConvertType : struct
{
if (!TypeIntrospector <TConvertType> .IsPrimitive)
{
ThrowHelpers.ThrowOnlyPrimitivesException <TConvertType>();
}
return(ReinterpretPrimitive <TConvertType>(bytes, start));
}
/// <summary>
/// Reinterprets the provided <see cref="bytes"/> to the specified generic array of value types.
/// </summary>
/// <typeparam name="TConvertType">The element type to reinterpret to.</typeparam>
/// <param name="bytes">The bytes chunk.</param>
/// <returns>The array of converted values.</returns>
public static TConvertType[] ReinterpretToArray <TConvertType>(this Span <byte> bytes)
where TConvertType : unmanaged
{
//Don't check nullness for perf. Callers shouldn't give us null arrays
if (bytes.Length == 0)
{
return(Array.Empty <TConvertType>());
}
if (bytes.Length % MarshalSizeOf <TConvertType> .SizeOf != 0)
{
ThrowHelpers.ThrowMismatchedArraySizeForElementType <char>();
}
return(ReinterpretPrimitiveArray <TConvertType>(bytes));
}
public static unsafe TConvertType Reinterpret <TConvertType>(this IntPtr bytes)
where TConvertType : struct
{
//Originally we null and length checked the bytes. This caused performance issues on .NET Core for some reason
//Removing them increased the speed by almost an order of magnitude.
//We shouldn't really handhold the user trying to reinterpet things into other things
//If they're using this library then they should KNOW they shouldn't mess around and anything could happen
//We already sacrfice safety for performance. An order of magnitude performance increase is a no brainer here.
if (!TypeIntrospector <TConvertType> .IsPrimitive)
{
ThrowHelpers.ThrowOnlyPrimitivesException <TConvertType>();
}
return(ReinterpretPrimitive <TConvertType>((byte *)bytes));
}
public unsafe static byte[] Reinterpret <TConvertType>(this TConvertType[] values)
where TConvertType : struct
{
//Don't check if null. It's a lot faster not to
if (values.Length == 0)
{
return(new byte[0]);
}
if (!TypeIntrospector <TConvertType> .IsPrimitive)
{
ThrowHelpers.ThrowOnlyPrimitivesException <TConvertType>();
}
//BlockCopy is slightly faster if we have to reallocate
byte[] bytes = new byte[MarshalSizeOf <TConvertType> .SizeOf * values.Length];
Buffer.BlockCopy(values, 0, bytes, 0, MarshalSizeOf <TConvertType> .SizeOf * values.Length);
return(bytes);
}
/// <summary>
/// Reinterprets the provided <see cref="bytes"/> to the specified generic array of value types.
/// </summary>
/// <typeparam name="TConvertType">The element type to reinterpret to.</typeparam>
/// <param name="bytes">The bytes chunk.</param>
/// <returns>The array of converted values.</returns>
public static unsafe TConvertType[] ReinterpretToArray <TConvertType>(this byte[] bytes)
where TConvertType : struct
{
//Don't check nullness for perf. Callers shouldn't give us null arrays
if (bytes.Length == 0)
{
return(new TConvertType[0]);
}
if (!TypeIntrospector <TConvertType> .IsPrimitive)
{
ThrowHelpers.ThrowOnlyPrimitivesException <TConvertType>();
}
if (bytes.Length % MarshalSizeOf <TConvertType> .SizeOf != 0)
{
ThrowHelpers.ThrowMismatchedArraySizeForElementType <char>();
}
return(ReinterpretPrimitiveArray <TConvertType>(bytes));
}
