Interface.hs

{-# LANGUAGE EmptyDataDecls, ExistentialQuantification,
  FlexibleContexts, FlexibleInstances, ForeignFunctionInterface,
  MultiParamTypeClasses, ScopedTypeVariables, TypeFamilies,
  TypeSynonymInstances #-}
module GDAL.OGRLayer.Interface where
import Data.Word
import Data.Int
import Foreign.C
import Foreign.Ptr
import FFICXX.Runtime.Cast
import GDAL.OGRLayer.RawType
import GDAL.OGRFeature.RawType
import GDAL.OGRFeatureDefn.RawType
import GDAL.GDALMajorObject.Interface

class (IGDALMajorObject a) => IOGRLayer a where
        getFeature :: () => a -> CInt -> IO OGRFeature
        
        getFeatureCount :: () => a -> CInt -> IO CInt
        
        getLayerDefn :: () => a -> IO OGRFeatureDefn
        
        getNextFeature :: () => a -> IO OGRFeature
        
        resetReading :: () => a -> IO ()

upcastOGRLayer :: forall a . (FPtr a, IOGRLayer a) => a -> OGRLayer
upcastOGRLayer h
  = let fh = get_fptr h
        fh2 :: Ptr RawOGRLayer = castPtr fh
      in cast_fptr_to_obj fh2

downcastOGRLayer ::
                 forall a . (FPtr a, IOGRLayer a) => OGRLayer -> a
downcastOGRLayer h
  = let fh = get_fptr h
        fh2 = castPtr fh
      in cast_fptr_to_obj fh2