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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace System.Buffers.Binary
{
public static partial class BinaryPrimitives
{
/// <summary>
/// Reads an Int16 out of a read-only span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static short ReadInt16LittleEndian(ReadOnlySpan<byte> source)
{
short result = MemoryMarshal.Read<short>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads an Int32 out of a read-only span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ReadInt32LittleEndian(ReadOnlySpan<byte> source)
{
int result = MemoryMarshal.Read<int>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads an Int64 out of a read-only span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static long ReadInt64LittleEndian(ReadOnlySpan<byte> source)
{
long result = MemoryMarshal.Read<long>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads a UInt16 out of a read-only span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ushort ReadUInt16LittleEndian(ReadOnlySpan<byte> source)
{
ushort result = MemoryMarshal.Read<ushort>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads a UInt32 out of a read-only span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static uint ReadUInt32LittleEndian(ReadOnlySpan<byte> source)
{
uint result = MemoryMarshal.Read<uint>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads a UInt64 out of a read-only span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ulong ReadUInt64LittleEndian(ReadOnlySpan<byte> source)
{
ulong result = MemoryMarshal.Read<ulong>(source);
if (!BitConverter.IsLittleEndian)
{
result = ReverseEndianness(result);
}
return result;
}
/// <summary>
/// Reads an Int16 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain an Int16, return false.</returns>
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadInt16LittleEndian(ReadOnlySpan<byte> source, out short value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
/// <summary>
/// Reads an Int32 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain an Int32, return false.</returns>
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadInt32LittleEndian(ReadOnlySpan<byte> source, out int value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
/// <summary>
/// Reads an Int64 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain an Int64, return false.</returns>
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadInt64LittleEndian(ReadOnlySpan<byte> source, out long value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
/// <summary>
/// Reads a UInt16 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain a UInt16, return false.</returns>
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadUInt16LittleEndian(ReadOnlySpan<byte> source, out ushort value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
/// <summary>
/// Reads a UInt32 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain a UInt32, return false.</returns>
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadUInt32LittleEndian(ReadOnlySpan<byte> source, out uint value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
/// <summary>
/// Reads a UInt64 out of a read-only span of bytes as little endian.
/// <returns>If the span is too small to contain a UInt64, return false.</returns>
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryReadUInt64LittleEndian(ReadOnlySpan<byte> source, out ulong value)
{
bool success = MemoryMarshal.TryRead(source, out value);
if (!BitConverter.IsLittleEndian)
{
value = ReverseEndianness(value);
}
return success;
}
}
}
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