-- GENERATED by C->Haskell Compiler, version 0.16.3 Crystal Seed, 24 Jan 2009 (Haskell)
-- Edit the ORIGNAL .chs file instead!
{-# LINE 1 ".\\HGamer3D\\Bindings\\Bullet\\Utils.chs" #-}{-# LANGUAGE ForeignFunctionInterface #-}
{-# LANGUAGE TypeSynonymInstances #-}
-- This source file is part of HGamer3D
-- (A project to enable 3D game development in Haskell)
-- For the latest info, see http://www.althainz.de/HGamer3D.html
--
-- (c) 2011, 2012 Peter Althainz
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Utils.hs
-- Marshalling Utilities
module HGamer3D.Bindings.Bullet.Utils where
import Foreign
import Foreign.Ptr
import Foreign.C
import HGamer3D.Data.HG3DClass
import HGamer3D.Data.Vector
import HGamer3D.Data.Colour
import HGamer3D.Data.Angle
import Control.Monad (liftM)
-- Strings with explicit length
--
withCStringLenIntConv :: Num n => String -> ((CString, n) -> IO a) -> IO a
withCStringLenIntConv s f = withCStringLen s $ \(p, n) -> f (p, fromIntegral n)
peekCStringLenIntConv :: Integral n => (CString, n) -> IO String
peekCStringLenIntConv (s, n) = peekCStringLen (s, fromIntegral n)
-- Marshalling of numerals
--
withIntConv :: (Storable b, Integral a, Integral b)
=> a -> (Ptr b -> IO c) -> IO c
withIntConv = with . fromIntegral
withFloatConv :: (Storable b, RealFloat a, RealFloat b)
=> a -> (Ptr b -> IO c) -> IO c
withFloatConv = with . realToFrac
peekIntConv :: (Storable a, Integral a, Integral b)
=> Ptr a -> IO b
peekIntConv = liftM fromIntegral . peek
peekFloatConv :: (Storable a, RealFloat a, RealFloat b)
=> Ptr a -> IO b
peekFloatConv = liftM realToFrac . peek
-- String Conversion functions
--
withCUString b f = withCWString b (f . castPtr)
peekCUString = peekCWString . castPtr
alloc64k = allocaBytes (1024 * 64)
-- c2hs replacements of utility functions, to get rid of annoying c2hs
-- deprecated messages
-- Passing Enums
cIntFromEnum :: Enum a => a -> CInt
cIntFromEnum = cIntConv . fromEnum
cIntToEnum :: Enum a => CInt -> a
cIntToEnum = toEnum . cIntConv
-- Passing Booleans by reference
--
withBoolUtil :: (Integral a, Storable a) => Bool -> (Ptr a -> IO b) -> IO b
withBoolUtil = with . fromBool
peekBoolUtil :: (Integral a, Storable a) => Ptr a -> IO Bool
peekBoolUtil = liftM toBool . peek
-- Passing enums by reference
--
withEnumUtil :: (Enum a, Integral b, Storable b) => a -> (Ptr b -> IO c) -> IO c
withEnumUtil = with . cFromEnum
peekEnumUtil :: (Enum a, Integral b, Storable b) => Ptr b -> IO a
peekEnumUtil = liftM cToEnum . peek
-- Conversion routines
-- -------------------
-- |Integral conversion
--
cIntConv :: (Integral a, Integral b) => a -> b
cIntConv = fromIntegral
-- |Floating conversion
--
cFloatConv :: (RealFloat a, RealFloat b) => a -> b
cFloatConv = realToFrac
-- |Convert a C enumeration to Haskell.
--
cToEnum :: (Integral i, Enum e) => i -> e
cToEnum = toEnum . fromIntegral
-- |Convert a Haskell enumeration to C.
--
cFromEnum :: (Enum e, Integral i) => e -> i
cFromEnum = fromIntegral . fromEnum