using System;
using System.Runtime.InteropServices;


namespace test
{
	/// <summary>
	/// Summary description for al.
	/// </summary>
	
		public class al
		{
			public al()
			{
				//
				// TODO: Add constructor logic here
				//
			}

			[DllImport("al21mfc.dll",EntryPoint="newALGlDecompressor")]
			public static extern long newALGlDecompressor(int compressionlevel);

			[DllImport("al21mfc.dll",EntryPoint="newALWinMemory")]
			public static extern long newALWinMemory(string BufferName,byte[] UserBuffer, long UserBufferSize);
		
			[DllImport("al21mfc.dll",EntryPoint="ALDecompress",SetLastError=true)]
			public static extern long ALDecompress(long Decompressor, long InputStorage, long OutputStorage, long CompressedLength);

			[DllImport("al21mfc.dll",EntryPoint="ALMemoryBaseGetBufferSize")]
			public static extern long ALMemoryBaseGetBufferSize(long storage);

			//		[DllImport("al21mfc.dll",EntryPoint="ALWinMemoryGetBuffer")]
			//		public static extern byte[] ALWinMemoryGetBuffer(long storage);

			[DllImport("al21mfc.dll",EntryPoint="deleteALStorage")]
			public static extern void deleteALStorage(long storage);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageIsOpen")]
			public static extern long ALStorageIsOpen(long storage);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageOpen")]
			public static extern long ALStorageOpen(long storage);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageFlushBuffer")]
			public static extern long ALStorageFlushBuffer(long storage);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageSeek")]
			public static extern long ALStorageSeek(long storage,long address);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageGetSize")]
			public static extern long ALStorageGetSize(long storage);
	
			[DllImport("al21mfc.dll",EntryPoint="ALStorageReadBuffer")]
			public static extern long ALStorageReadBuffer(long storage, byte [] buffer, long length);

			[DllImport("al21mfc.dll",EntryPoint="ALStorageClose")]
			public static extern long ALStorageClose(long storage);
		



			public static byte[] ALWinMemoryGetBuffer(long mem_object)
			{
				long open_object=0;
				open_object = ALStorageIsOpen(mem_object);
				if(open_object == 0 )
					ALStorageOpen (mem_object);
			
				long Length=0;
				ALStorageFlushBuffer (mem_object);
				long I;
				I = ALStorageSeek(mem_object, 0);
				Length = ALStorageGetSize(mem_object);
				byte[] a = new byte[Length];
				I = ALStorageReadBuffer(mem_object, a, Length);
			
				if (open_object == 0 ) 
					ALStorageClose (mem_object);
				return  a;
			}

			public enum Compressionlevel
			{
				AL_GREENLEAF_LEVEL_0 = 0,
				AL_GREENLEAF_LEVEL_1 = 1,
				AL_GREENLEAF_LEVEL_2 = 2,
				AL_GREENLEAF_LEVEL_3 = 3,
				AL_GREENLEAF_LEVEL_4 = 4
			}

		}
	}