public DegraStream(Stream stream)
{
gcHandle = GCHandle.Alloc(stream, GCHandleType.Normal);
var initializer = new NativeBridge.DegraStreamInitializer();
initializer.user_data = GCHandle.ToIntPtr(gcHandle);
if (stream.CanRead)
{
initializer.read = (IntPtr userData, IntPtr buffer, ulong length) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
byte [] arr = new byte [length];
int read = originalStream.Read(arr, 0, ( int )length);
Marshal.Copy(arr, 0, buffer, read);
return(( ulong )read);
};
}
if (stream.CanWrite)
{
initializer.write = (IntPtr userData, IntPtr data, ulong length) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
byte [] arr = new byte [length];
Marshal.Copy(data, arr, 0, ( int )length);
originalStream.Write(arr, 0, ( int )length);
return(length);
};
}
if (stream.CanSeek)
{
initializer.seek = (IntPtr userData, System.IO.SeekOrigin origin, ulong offset) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
originalStream.Seek(( long )offset, origin);
return(true);
};
}
initializer.flush = ( IntPtr userData ) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
originalStream.Flush();
};
initializer.position = ( IntPtr userData ) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
return(( ulong )originalStream.Position);
};
initializer.length = ( IntPtr userData ) =>
{
GCHandle handle = GCHandle.FromIntPtr(userData);
var originalStream = handle.Target as Stream;
return(( ulong )originalStream.Length);
};
this.stream = NativeBridge.Degra_CreateStream(ref initializer);
if (this.stream == IntPtr.Zero)
{
throw new IOException();
}
}