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.NET-Community-Toolkit/CommunityToolkit.HighPerformance/Streams/MemoryStream.Validate.cs
2021-12-29 18:56:14 +01:00

81 lines
2.5 KiB
C#

// 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.IO;
using System.Runtime.CompilerServices;
namespace CommunityToolkit.HighPerformance.Streams;
/// <inheritdoc/>
partial class MemoryStream
{
/// <summary>
/// Validates the <see cref="Stream.Position"/> argument (it needs to be in the [0, length]) range.
/// </summary>
/// <param name="position">The new <see cref="Stream.Position"/> value being set.</param>
/// <param name="length">The maximum length of the target <see cref="Stream"/>.</param>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ValidatePosition(long position, int length)
{
if ((ulong)position > (ulong)length)
{
ThrowArgumentOutOfRangeExceptionForPosition();
}
}
/// <summary>
/// Validates the <see cref="Stream.Read(byte[],int,int)"/> or <see cref="Stream.Write(byte[],int,int)"/> arguments.
/// </summary>
/// <param name="buffer">The target array.</param>
/// <param name="offset">The offset within <paramref name="buffer"/>.</param>
/// <param name="count">The number of elements to process within <paramref name="buffer"/>.</param>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ValidateBuffer(byte[]? buffer, int offset, int count)
{
if (buffer is null)
{
ThrowArgumentNullExceptionForBuffer();
}
if (offset < 0)
{
ThrowArgumentOutOfRangeExceptionForOffset();
}
if (count < 0)
{
ThrowArgumentOutOfRangeExceptionForCount();
}
if (offset + count > buffer!.Length)
{
ThrowArgumentExceptionForLength();
}
}
/// <summary>
/// Validates the <see cref="MemoryStream{TSource}.CanWrite"/> property.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ValidateCanWrite(bool canWrite)
{
if (!canWrite)
{
ThrowNotSupportedException();
}
}
/// <summary>
/// Validates that a given <see cref="Stream"/> instance hasn't been disposed.
/// </summary>
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ValidateDisposed(bool disposed)
{
if (disposed)
{
ThrowObjectDisposedException();
}
}
}