terrahs-0.7: A library for GIS Programs in Haskell. Contents Index

TerraHS.Algebras.Base.Object

Contents The Pointer class The Convert class The Element class The Size class

Description

Module for handling terralib an haskell objects

Synopsis

class Pointer a where new :: a -> IO (Ptr a) fromPointer :: Ptr a -> IO a delete :: Ptr a -> IO () class Convert a b where to :: a -> b from :: b -> a class Element a b where getElement :: Ptr a -> Int32 -> IO b class Size a where size :: Ptr a -> IO Int32

The Pointer class

class Pointer a where

The class Pointer is a class for handling pointers to objects, ex: TePoint and TePointPtr Methods new :: a -> IO (Ptr a) create a pointer from haskell object fromPointer :: Ptr a -> IO a create a haskell object from a pointer delete :: Ptr a -> IO () delete a pointer from memory Instances Pointer TeDatabase Pointer TeTable Pointer TeBox Pointer TeCellSet Pointer TeCell Pointer TePointSet Pointer TePoint Pointer TeLineSet Pointer TeLine2D Pointer TePolygonSet Pointer TePolygon Pointer TeLayer Pointer TeProjection Pointer TeTheme Pointer TeSTInstance Pointer TeQuerier Pointer (TeRaster Double)

The Convert class

class Convert a b where

The class Convert permit the converts from diferents objects Methods to :: a -> b convert from a to b from :: b -> a convert from b to a

The Element class

class Element a b where

Methods getElement :: Ptr a -> Int32 -> IO b Instances Element TeCellSet TeCell Element TeCellSet TeCell Element TePointSet TePoint Element TePointSet TePoint Element TeLineSet TeLine2D Element TeLineSet TeLine2D Element TePolygonSet TePolygon Element TePolygonSet TePolygon

The Size class

class Size a where

Methods size :: Ptr a -> IO Int32 Instances Size TeCellSet Size TePointSet Size TeLineSet Size TePolygonSet

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