ThrowHelper.cs

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using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;
 
namespace System.Security.Cryptography;
 
internal static class ThrowHelper
{
    public enum ExceptionArgument
    {
        inputBuffer,
        outputBuffer,
        inputOffset,
        inputCount
    }
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static void ValidateTransformBlock(byte[] inputBuffer, int inputOffset, int inputCount)
    {
        if (inputBuffer == null)
        {
            ThrowArgumentNull(ExceptionArgument.inputBuffer);
        }
        if ((uint)inputCount > inputBuffer.Length)
        {
            ThrowArgumentOutOfRange(ExceptionArgument.inputCount);
        }
        if (inputOffset < 0)
        {
            ThrowArgumentOutOfRange(ExceptionArgument.inputOffset);
        }
        if (inputBuffer.Length - inputCount < inputOffset)
        {
            ThrowInvalidOffLen();
        }
    }
 
    [DoesNotReturn]
    public static void ThrowArgumentNull(ExceptionArgument argument)
    {
        throw new ArgumentNullException(argument.ToString());
    }
 
    [DoesNotReturn]
    public static void ThrowArgumentOutOfRange(ExceptionArgument argument)
    {
        throw new ArgumentOutOfRangeException(argument.ToString(), System.SR.ArgumentOutOfRange_NeedNonNegNum);
    }
 
    [DoesNotReturn]
    public static void ThrowInvalidOffLen()
    {
        throw new ArgumentException(System.SR.Argument_InvalidOffLen);
    }
 
    [DoesNotReturn]
    public static void ThrowObjectDisposed()
    {
        throw new ObjectDisposedException(null, System.SR.ObjectDisposed_Generic);
    }
 
    [DoesNotReturn]
    public static void ThrowBase64FormatException()
    {
        throw new FormatException();
    }
}