private void Init(bool canRead, bool canWrite, bool canSeek, bool canRelease)
{
#if (VERBOSE_DEBUG)
DebugOutput("GpgmeCbsData.Init(" + canRead.ToString() + ","
+ canWrite.ToString() + ","
+ canSeek.ToString() + ","
+ canRelease.ToString() + ")");
#endif
_handle = IncGlobalHandle(); // increment the global handle
_cbs = new _gpgme_data_cbs();
_cbs_lfs = new _gpgme_data_cbs_lfs();
// Read function
if (canRead)
{
_cbs.read = InternalReadCallback;
_cbs_lfs.read = InternalReadCallback;
}
else
{
_cbs.read = null;
_cbs_lfs.read = null;
}
// Write function
if (canWrite)
{
_cbs.write = InternalWriteCallback;
_cbs_lfs.write = InternalWriteCallback;
}
else
{
_cbs.write = null;
_cbs_lfs.write = null;
}
// Seek function
if (canSeek)
{
_cbs.seek = InternalSeekCallback;
_cbs_lfs.seek = InternalSeekLfsCallback;
}
else
{
_cbs.seek = null;
_cbs_lfs.seek = null;
}
// Release
if (canRelease)
{
_cbs.release = InternalReleaseCallback;
_cbs_lfs.release = InternalReleaseCallback;
}
else
{
_cbs.release = null;
_cbs_lfs.release = null;
}
_pinned_cbs = GCHandle.Alloc(_cbs);
_pinned_cbs_lfs = GCHandle.Alloc(_cbs_lfs);
if (libgpgme.use_lfs)
{
_cbs_ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(_cbs_lfs));
Marshal.StructureToPtr(_cbs_lfs, _cbs_ptr, false);
}
else
{
_cbs_ptr = Marshal.AllocCoTaskMem(Marshal.SizeOf(_cbs));
Marshal.StructureToPtr(_cbs, _cbs_ptr, false);
}
int err = libgpgme.NativeMethods.gpgme_data_new_from_cbs(
out dataPtr,
_cbs_ptr,
_handle);
#if (VERBOSE_DEBUG)
DebugOutput("gpgme_data_new_from_cbs(..) DONE.");
#endif
gpg_err_code_t errcode = libgpgme.gpgme_err_code(err);
if (errcode == gpg_err_code_t.GPG_ERR_NO_ERROR)
{
return;
}
if (errcode == gpg_err_code_t.GPG_ERR_ENOMEM)
{
throw new OutOfMemoryException("Not enough memory available to create user defined GPGME data object.");
}
throw new GeneralErrorException("Unknown error " + errcode + " (" + err + ")");
}
internal static extern int gpgme_data_new_from_cbs(
[Out] out IntPtr dh,
[In][MarshalAs(UnmanagedType.FunctionPtr)] _gpgme_data_cbs cbs, //gpgme_data_cbs_t
[In] IntPtr handle);