{-# LINE 1 "Magic/Init.hsc" #-}
{- -*- Mode: haskell; -*-
Haskell magic Interface
Copyright (C) 2005 John Goerzen <jgoerzen@complete.org>

This code is under a 3-clause BSD license; see COPYING for details.
-}

{- |
   Module     : Magic.Init
   Copyright  : Copyright (C) 2005 John Goerzen
   License    : BSD

   Maintainer : John Goerzen,
   Maintainer : jgoerzen\@complete.org
   Stability  : provisional
   Portability: portable

Initialization and shutdown for magic programs

Written by John Goerzen, jgoerzen\@complete.org
-}

module Magic.Init(magicOpen, magicLoad, magicLoadDefault)
where

import Foreign.Ptr
import Foreign.C.String
import Magic.Types
import Foreign.C.Types
import Magic.Utils
import Magic.TypesLL
import Foreign.Marshal.Utils

{- | Create a Magic object.  You must call either 'magicLoadDefault'
or 'magicLoad' after this.
-}
magicOpen :: [MagicFlag] -> IO Magic
magicOpen :: [MagicFlag] -> IO Magic
magicOpen [MagicFlag]
mfl =
    String -> IO (Ptr CMagic) -> IO Magic
fromMagicPtr String
"magicOpen" (CInt -> IO (Ptr CMagic)
magic_open CInt
flags)
    where flags :: CInt
flags = [MagicFlag] -> CInt
flaglist2int [MagicFlag]
mfl

{- | Load the system's default magic database. -}
magicLoadDefault :: Magic -> IO ()
magicLoadDefault :: Magic -> IO ()
magicLoadDefault Magic
m = Magic -> (Ptr CMagic -> IO ()) -> IO ()
forall a. Magic -> (Ptr CMagic -> IO a) -> IO a
withMagicPtr Magic
m (\Ptr CMagic
cmagic ->
    String -> Magic -> IO CInt -> IO ()
checkIntError String
"magicLoadDefault" Magic
m (IO CInt -> IO ()) -> IO CInt -> IO ()
forall a b. (a -> b) -> a -> b
$ Ptr CMagic -> CString -> IO CInt
magic_load Ptr CMagic
cmagic CString
forall a. Ptr a
nullPtr)

{- | Load the specified magic database(s).  The given string may contain
multiple colon-separated pathnames. -}
magicLoad :: Magic -> String -> IO ()
magicLoad :: Magic -> String -> IO ()
magicLoad Magic
m String
s = Magic -> (Ptr CMagic -> IO ()) -> IO ()
forall a. Magic -> (Ptr CMagic -> IO a) -> IO a
withMagicPtr Magic
m (\Ptr CMagic
cmagic ->
    String -> (CString -> IO ()) -> IO ()
forall a. String -> (CString -> IO a) -> IO a
withCString String
s (\CString
cs ->
     String -> Magic -> IO CInt -> IO ()
checkIntError String
"magicLoad" Magic
m (IO CInt -> IO ()) -> IO CInt -> IO ()
forall a b. (a -> b) -> a -> b
$ Ptr CMagic -> CString -> IO CInt
magic_load Ptr CMagic
cmagic CString
cs))
    
foreign import ccall unsafe "magic.h magic_open"
  magic_open :: CInt -> IO (Ptr CMagic)

foreign import ccall unsafe "magic.h magic_load"
  magic_load :: Ptr CMagic -> CString -> IO CInt