using System;
using System.Runtime.InteropServices;

namespace CPF.Mac.CoreFoundation
{
	internal class CFDataBuffer : IDisposable
	{
		private byte[] buffer;

		private CFData data;

		private bool owns;

		public IntPtr Handle => data.Handle;

		public byte[] Data => buffer;

		public byte this[int idx] => buffer[idx];

		public CFDataBuffer(byte[] buffer)
		{
			this.buffer = buffer;
			GCHandle gCHandle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
			data = CFData.FromData(gCHandle.AddrOfPinnedObject(), buffer.Length);
			gCHandle.Free();
			owns = true;
		}

		public CFDataBuffer(IntPtr ptr)
		{
			data = new CFData(ptr, owns: false);
			buffer = data.GetBuffer();
			owns = false;
		}

		~CFDataBuffer()
		{
			Dispose(disposing: false);
		}

		public void Dispose()
		{
			Dispose(disposing: true);
			GC.SuppressFinalize(this);
		}

		protected virtual void Dispose(bool disposing)
		{
			if (data != null)
			{
				data.Dispose();
				data = null;
			}
		}
	}
}