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using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Common.Utilities
{
public static class SpanHelpers
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> CreateSpan<T>(scoped ref T reference, int length)
{
return MemoryMarshal.CreateSpan(ref reference, length);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<T> AsSpan<T>(scoped ref T reference) where T : unmanaged
{
return CreateSpan(ref reference, 1);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<TSpan> AsSpan<TStruct, TSpan>(scoped ref TStruct reference)
where TStruct : unmanaged where TSpan : unmanaged
{
return CreateSpan(ref Unsafe.As<TStruct, TSpan>(ref reference),
Unsafe.SizeOf<TStruct>() / Unsafe.SizeOf<TSpan>());
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static Span<byte> AsByteSpan<T>(scoped ref T reference) where T : unmanaged
{
return CreateSpan(ref Unsafe.As<T, byte>(ref reference), Unsafe.SizeOf<T>());
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ReadOnlySpan<T> CreateReadOnlySpan<T>(scoped ref T reference, int length)
{
return MemoryMarshal.CreateReadOnlySpan(ref reference, length);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ReadOnlySpan<T> AsReadOnlySpan<T>(scoped ref T reference) where T : unmanaged
{
return CreateReadOnlySpan(ref reference, 1);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ReadOnlySpan<TSpan> AsReadOnlySpan<TStruct, TSpan>(scoped ref TStruct reference)
where TStruct : unmanaged where TSpan : unmanaged
{
return CreateReadOnlySpan(ref Unsafe.As<TStruct, TSpan>(ref reference),
Unsafe.SizeOf<TStruct>() / Unsafe.SizeOf<TSpan>());
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ReadOnlySpan<byte> AsReadOnlyByteSpan<T>(scoped ref T reference) where T : unmanaged
{
return CreateReadOnlySpan(ref Unsafe.As<T, byte>(ref reference), Unsafe.SizeOf<T>());
}
}
}
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