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);
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 = new gpgme_data_read_cb_t(_read_cb);
cbs_lfs.read = new gpgme_data_read_cb_t(_read_cb);
}
else
{
cbs.read = null;
cbs_lfs.read = null;
}
// Write function
if (canWrite)
{
cbs.write = new gpgme_data_write_cb_t(_write_cb);
cbs_lfs.write = new gpgme_data_write_cb_t(_write_cb);
}
else
{
cbs.write = null;
cbs_lfs.write = null;
}
// Seek function
if (canSeek)
{
cbs.seek = new gpgme_data_seek_cb_t(_seek_cb);
cbs_lfs.seek = new gpgme_data_seek_cb_t_lfs(_seek_cb_lfs);
}
else
{
cbs.seek = null;
cbs_lfs.seek = null;
}
// Release
if (canRelease)
{
cbs.release = new gpgme_data_release_cb_t(_release_cb);
cbs_lfs.release = new gpgme_data_release_cb_t(_release_cb);
}
else
{
cbs.release = null;
cbs_lfs.release = null;
}
pinnedCbs = GCHandle.Alloc(cbs);
pinnedCbs_lfs = GCHandle.Alloc(cbs_lfs);
if (libgpgme.use_lfs)
{
cbsPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(cbs_lfs));
Marshal.StructureToPtr(cbs_lfs, cbsPtr, false);
} else {
cbsPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(cbs));
Marshal.StructureToPtr(cbs, cbsPtr, false);
}
int err = libgpgme.gpgme_data_new_from_cbs(
out dataPtr,
cbsPtr,
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 + ")");
}