%
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% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
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% You should have received a copy of the GNU General Public License
% along with this program. If not, see .
\ignore{
\begin{code}
module DBus.Padding
( padding
, alignment
) where
import Data.Word (Word8, Word64)
import qualified DBus.Types as T
\end{code}
}
\section{Byte padding and alignment}
\begin{code}
padding :: Word64 -> Word8 -> Word64
padding current count = required where
count' = fromIntegral count
missing = mod current count'
required = if missing > 0
then count' missing
else 0
\end{code}
\begin{code}
alignment :: T.Type -> Word8
alignment T.BooleanT = 4
alignment T.ByteT = 1
alignment T.UInt16T = 2
alignment T.UInt32T = 4
alignment T.UInt64T = 8
alignment T.Int16T = 2
alignment T.Int32T = 4
alignment T.Int64T = 8
alignment T.DoubleT = 8
alignment T.StringT = 4
alignment T.ObjectPathT = 4
alignment T.SignatureT = 1
alignment (T.ArrayT _) = 4
alignment (T.DictionaryT _ _) = 4
alignment (T.StructureT _) = 8
alignment T.VariantT = 1
\end{code}