public static int Read(IntPtr dh, byte[] buffer, int offset, int count)
{
// Allocate an unmanaged memory buffer
var bufPtr = Marshal.AllocHGlobal(count);
// Allow GpgMe to fill the unmanaged buffer
var read = GpgMeWrapper.gpgme_data_read(dh, bufPtr, count);
// Copy the unmanaged buffer into the managed buffer
Marshal.Copy(bufPtr, buffer, offset, count);
// And free the unmanaged buffer
Marshal.FreeHGlobal(bufPtr);
return(read);
}
/// <summary>
/// Read a GpgME data buffer into a C# byte buffer.
/// </summary>
public static byte[] ReadBuffer(IntPtr dh, int bufferSize = 4096)
{
var allData = new List <byte>();
int read;
do
{
// Allocate an unmanaged memory buffer
var bufPtr = Marshal.AllocHGlobal(bufferSize);
// Allow GpgMe to fill the unmanaged buffer
read = GpgMeWrapper.gpgme_data_read(dh, bufPtr, bufferSize);
// Copy the unmanaged buffer into a managed buffer
var buffer = new byte[bufferSize];
Marshal.Copy(bufPtr, buffer, 0, bufferSize);
// And free the unmanaged buffer
Marshal.FreeHGlobal(bufPtr);
allData.AddRange(buffer.Take(read));
} while (read == bufferSize);
// All those copies are pretty slow, but for now, we'll just have to live with that.
return(allData.ToArray());
}