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WriterLittleEndian.cs
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WriterLittleEndian.cs
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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.
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace System.Buffers.Binary
{
public static partial class BinaryPrimitives
{
/// <summary>
/// Writes a <see cref="double" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <remarks>Writes exactly 8 bytes to the beginning of the span.</remarks>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="destination" /> is too small to contain a <see cref="double" />.
/// </exception>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteDoubleLittleEndian(Span<byte> destination, double value)
{
if (!BitConverter.IsLittleEndian)
{
long tmp = ReverseEndianness(BitConverter.DoubleToInt64Bits(value));
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes a <see cref="Half" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <remarks>Writes exactly 2 bytes to the beginning of the span.</remarks>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="destination" /> is too small to contain a <see cref="Half" />.
/// </exception>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteHalfLittleEndian(Span<byte> destination, Half value)
{
if (!BitConverter.IsLittleEndian)
{
short tmp = ReverseEndianness(BitConverter.HalfToInt16Bits(value));
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes an Int16 into a span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteInt16LittleEndian(Span<byte> destination, short value)
{
if (!BitConverter.IsLittleEndian)
{
short tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes an Int32 into a span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteInt32LittleEndian(Span<byte> destination, int value)
{
if (!BitConverter.IsLittleEndian)
{
int tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes an Int64 into a span of bytes as little endian.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteInt64LittleEndian(Span<byte> destination, long value)
{
if (!BitConverter.IsLittleEndian)
{
long tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes a <see cref="float" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <remarks>Writes exactly 4 bytes to the beginning of the span.</remarks>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="destination" /> is too small to contain a <see cref="float" />.
/// </exception>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteSingleLittleEndian(Span<byte> destination, float value)
{
if (!BitConverter.IsLittleEndian)
{
int tmp = ReverseEndianness(BitConverter.SingleToInt32Bits(value));
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Write a UInt16 into a span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteUInt16LittleEndian(Span<byte> destination, ushort value)
{
if (!BitConverter.IsLittleEndian)
{
ushort tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Write a UInt32 into a span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteUInt32LittleEndian(Span<byte> destination, uint value)
{
if (!BitConverter.IsLittleEndian)
{
uint tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Write a UInt64 into a span of bytes as little endian.
/// </summary>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void WriteUInt64LittleEndian(Span<byte> destination, ulong value)
{
if (!BitConverter.IsLittleEndian)
{
ulong tmp = ReverseEndianness(value);
MemoryMarshal.Write(destination, ref tmp);
}
else
{
MemoryMarshal.Write(destination, ref value);
}
}
/// <summary>
/// Writes a <see cref="double" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <returns>
/// <see langword="true" /> if the span is large enough to contain a <see cref="double" />; otherwise, <see langword="false" />.
/// </returns>
/// <remarks>Writes exactly 8 bytes to the beginning of the span.</remarks>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteDoubleLittleEndian(Span<byte> destination, double value)
{
if (!BitConverter.IsLittleEndian)
{
long tmp = ReverseEndianness(BitConverter.DoubleToInt64Bits(value));
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Writes a <see cref="Half" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <returns>
/// <see langword="true" /> if the span is large enough to contain a <see cref="Half" />; otherwise, <see langword="false" />.
/// </returns>
/// <remarks>Writes exactly 2 bytes to the beginning of the span.</remarks>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteHalfLittleEndian(Span<byte> destination, Half value)
{
if (!BitConverter.IsLittleEndian)
{
short tmp = ReverseEndianness(BitConverter.HalfToInt16Bits(value));
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Writes an Int16 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteInt16LittleEndian(Span<byte> destination, short value)
{
if (!BitConverter.IsLittleEndian)
{
short tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Writes an Int32 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteInt32LittleEndian(Span<byte> destination, int value)
{
if (!BitConverter.IsLittleEndian)
{
int tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Writes an Int64 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteInt64LittleEndian(Span<byte> destination, long value)
{
if (!BitConverter.IsLittleEndian)
{
long tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Writes a <see cref="float" /> into a span of bytes, as little endian.
/// </summary>
/// <param name="destination">The span of bytes where the value is to be written, as little endian.</param>
/// <param name="value">The value to write into the span of bytes.</param>
/// <returns>
/// <see langword="true" /> if the span is large enough to contain a <see cref="float" />; otherwise, <see langword="false" />.
/// </returns>
/// <remarks>Writes exactly 4 bytes to the beginning of the span.</remarks>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteSingleLittleEndian(Span<byte> destination, float value)
{
if (!BitConverter.IsLittleEndian)
{
int tmp = ReverseEndianness(BitConverter.SingleToInt32Bits(value));
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Write a UInt16 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteUInt16LittleEndian(Span<byte> destination, ushort value)
{
if (!BitConverter.IsLittleEndian)
{
ushort tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Write a UInt32 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteUInt32LittleEndian(Span<byte> destination, uint value)
{
if (!BitConverter.IsLittleEndian)
{
uint tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
/// <summary>
/// Write a UInt64 into a span of bytes as little endian.
/// </summary>
/// <returns>If the span is too small to contain the value, return false.</returns>
[CLSCompliant(false)]
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool TryWriteUInt64LittleEndian(Span<byte> destination, ulong value)
{
if (!BitConverter.IsLittleEndian)
{
ulong tmp = ReverseEndianness(value);
return MemoryMarshal.TryWrite(destination, ref tmp);
}
return MemoryMarshal.TryWrite(destination, ref value);
}
}
}