-- file: Augeas.hsc

-- Haskell bindings for the Augeas library
-- Copyright (c) 2009-2012, Jude Nagurney

-- This library is free software; you can redistribute it and/or modify it 
-- under the terms of the GNU Lesser General Public License as published by 
-- the Free Software Foundation; either version 3 of the License, or 
-- (at your option) any later version.

-- This library 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 Lesser General Public 
-- License for more details.

-- You should have received a copy of the GNU Lesser General Public License 
-- along with this library; if not, write to the Free Software Foundation, 
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 

--
-- Contact the author at
-- jude@pwan.org

{-# LANGUAGE CPP, ForeignFunctionInterface, EmptyDataDecls, StandaloneDeriving #-}

#ifndef _config_h
#include "Config.h"
#define _config_h
#endif

module System.AugeasHsc where

import Foreign.C.Types
import Foreign.Storable

#include "augeas.h"


-- ----------------------------------
-- Maps to aug_flags enum in augeas.h
-- ----------------------------------

newtype AugFlag = AugFlag { unAugFlag :: CInt }
        deriving (Eq, Show)

#{enum AugFlag, AugFlag
       , none = AUG_NONE
       , save_backup = AUG_SAVE_BACKUP
       , save_newfile = AUG_SAVE_NEWFILE
       , type_check = AUG_TYPE_CHECK
       , no_stdinc = AUG_NO_STDINC
       , save_noop = AUG_SAVE_NOOP
       , no_load = AUG_NO_LOAD
       , no_modl_autoload = AUG_NO_MODL_AUTOLOAD
#ifdef HAS_AUGEAS_SPAN
       , enable_span = AUG_ENABLE_SPAN
#endif
}

-- ---------------------------------
-- Maps to auf_errcode_t in augeas.h
-- ---------------------------------

newtype AugErrCode = AugErrCode { unAugErrCode :: CInt }
        deriving (Eq, Show)

#{enum AugErrCode, AugErrCode
       , no_error = AUG_NOERROR
       , err_no_memory = AUG_ENOMEM
       , err_internal = AUG_EINTERNAL
       , err_bad_path = AUG_EPATHX
       , err_no_match = AUG_ENOMATCH
       , err_multi_matches = AUG_EMMATCH
       , err_syntax = AUG_ESYNTAX
       , err_no_lens = AUG_ENOLENS
       , err_multi_xfm = AUG_EMXFM
#ifdef HAS_AUGEAS_SPAN
       , err_no_span = AUG_ENOSPAN
#endif
#ifdef HAS_AUGEAS_SRUN
       , err_mv_desc = AUG_EMVDESC
       , err_cmd_run = AUG_ECMDRUN
#endif
#ifdef HAS_AUGEAS_TO_XML
       , err_bad_arg = AUG_EBADARG
#endif
}

#ifdef HAS_AUGEAS_TO_XML
#include <libxml/tree.h>
#let alignment t = "%lu", (unsigned long)offsetof(struct {char x__; t (y__); }, y__)
--data xmlNode
data AugeasXmlNode
--        deriving (Eq, Show)

data AugeasXmlNodeHandle = Ptr AugeasXmlNode

instance Storable AugeasXmlNode where
    alignment _ = #{alignment xmlNode}
    sizeOf _ = #{size xmlNode}
--    peek ptr = do  
--      _type <- #{peek xmlNode, type} ptr
--      name <- #{peek xmlNode, name} ptr
--      children <- #{peek xmlNode, children} ptr
--      last <- #{peek xmlNode, last} ptr
--      parent <- #{peek xmlNode, parent} ptr
--      next <- #{peek xmlNode, next} ptr
--      prev <- #{peek xmlNode, prev} ptr
--      doc <- #{peek xmlNode, doc} ptr
--      return (XmlNode _type name children last parent next prev doc)
--      return (XmlNode _type name )
--    poke ptr (XmlNode _type name children last parent next prev doc) = do 
--    poke ptr (XmlNode _type name) = do 
--       #{poke xmlNode, type} ptr _type
--       #{poke xmlNode, name} ptr name
    
#endif