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using System;
using System.IO;
using System.Threading;
#if NETCOREAPP1_0_OR_GREATER || NET45_OR_GREATER || NETSTANDARD1_0_OR_GREATER
using System.Threading.Tasks;
#endif
namespace Org.BouncyCastle.Utilities.IO
{
public abstract class BaseOutputStream
: Stream
{
public sealed override bool CanRead { get { return false; } }
public sealed override bool CanSeek { get { return false; } }
public sealed override bool CanWrite { get { return true; } }
#if NETCOREAPP2_0_OR_GREATER || NETSTANDARD2_1_OR_GREATER
// TODO[api] sealed
public override void CopyTo(Stream destination, int bufferSize) { throw new NotSupportedException(); }
#endif
#if NETCOREAPP1_0_OR_GREATER || NET45_OR_GREATER || NETSTANDARD1_0_OR_GREATER
// TODO[api] sealed
public override Task CopyToAsync(Stream destination, int bufferSize, CancellationToken cancellationToken)
{
throw new NotSupportedException();
}
#endif
public override void Flush() {}
public sealed override long Length { get { throw new NotSupportedException(); } }
public sealed override long Position
{
get { throw new NotSupportedException(); }
set { throw new NotSupportedException(); }
}
public sealed override int Read(byte[] buffer, int offset, int count) { throw new NotSupportedException(); }
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
public sealed override int Read(Span<byte> buffer) { throw new NotSupportedException(); }
// TODO[api] sealed
public override ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken = default)
{
throw new NotSupportedException();
}
#endif
public sealed override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(); }
public sealed override void SetLength(long value) { throw new NotSupportedException(); }
public override void Write(byte[] buffer, int offset, int count)
{
Streams.ValidateBufferArguments(buffer, offset, count);
for (int i = 0; i < count; ++i)
{
WriteByte(buffer[offset + i]);
}
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
public override void Write(ReadOnlySpan<byte> buffer)
{
int count = buffer.Length;
for (int i = 0; i < count; ++i)
{
WriteByte(buffer[i]);
}
}
public override ValueTask WriteAsync(ReadOnlyMemory<byte> buffer, CancellationToken cancellationToken = default)
{
return Streams.WriteAsync(this, buffer, cancellationToken);
}
#endif
public virtual void Write(params byte[] buffer)
{
Write(buffer, 0, buffer.Length);
}
}
}
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