public T Decode <T>(byte[] buffer, int index, int count, int formatStringOffset, bool force32Bit, int alignment) where T : struct
{
PicklePtrToStructure converter = delegate(IntPtr ptr)
{
return(TypeMarshal.ToStruct <T>(ptr, force32Bit, alignment));
};
return((T)Decode(converter, buffer, index, count, formatStringOffset));
}
public object Decode(PicklePtrToStructure converter, byte[] buffer, int index, int count, int formatStringOffset)
{
if (converter == null)
{
throw new ArgumentNullException("converter");
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (index < 0 || index >= buffer.Length)
{
throw new ArgumentOutOfRangeException("index", "index is out of range");
}
if (count < 0 || (index + count) > buffer.Length)
{
throw new ArgumentOutOfRangeException("count", "count is out of range");
}
IntPtr ndrHandle = IntPtr.Zero;
IntPtr pObj = IntPtr.Zero;
IntPtr pBuf = IntPtr.Zero;
try
{
#region init handle and environment
pBuf = Marshal.AllocHGlobal(buffer.Length);
Marshal.Copy(buffer, index, pBuf, count);
int rt = PickleNativeMethods.MesDecodeBufferHandleCreate(pBuf, (uint)buffer.Length, out ndrHandle);
if (rt != PickleError.RPC_S_OK)
{
throw new PickleException(rt, "Failed to create handle on given buffer.");
}
if (stubDesc.pHandle != IntPtr.Zero)
{
Marshal.FreeHGlobal(stubDesc.pHandle);
stubDesc.pHandle = IntPtr.Zero;
}
stubDesc.pHandle = Marshal.AllocHGlobal(Marshal.SizeOf(ndrHandle));
Marshal.WriteIntPtr(stubDesc.pHandle, ndrHandle);
#endregion
byte[] format = new byte[typeFormatString.Length - formatStringOffset];
Buffer.BlockCopy(typeFormatString, formatStringOffset, format, 0, format.Length);
PickleNativeMethods.NdrMesTypeDecode2(
ndrHandle,
ref __MIDL_TypePicklingInfo,
ref stubDesc,
format,
ref pObj);
if (pObj == IntPtr.Zero)
{
throw new PickleException("Failed to decode on given buffer and formatStringOffset.");
}
return(converter(pObj));
}
finally
{
if (ndrHandle != IntPtr.Zero)
{
PickleNativeMethods.MesHandleFree(ndrHandle);
//Ignore error
}
if (stubDesc.pHandle != IntPtr.Zero)
{
Marshal.FreeHGlobal(stubDesc.pHandle);
stubDesc.pHandle = IntPtr.Zero;
}
if (pObj != IntPtr.Zero)
{
MIDL_user_free(pObj);
pObj = IntPtr.Zero;
}
if (pBuf != IntPtr.Zero)
{
Marshal.FreeHGlobal(pBuf);
pBuf = IntPtr.Zero;
}
}
}
