{-
Copyright © 2007-2012 Gracjan Polak
Copyright © 2012-2016 Ömer Sinan Ağacan
Copyright © 2017 Albert Krewinkel

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE ForeignFunctionInterface #-}
{-|
Module      : Foreign.Lua.Api.RawBindings
Copyright   : © 2007–2012 Gracjan Polak,
                2012–2016 Ömer Sinan Ağacan,
                2017 Albert Krewinkel
License     : MIT
Maintainer  : Albert Krewinkel <tarleb+hslua@zeitkraut.de>
Stability   : beta
Portability : ForeignFunctionInterface

Haskell bindings to lua C API functions.
-}
module Foreign.Lua.Api.RawBindings where

import Foreign.C
import Foreign.Lua.Api.Types
import Foreign.Ptr

#include "safer-api.h"

-- TODO: lua_getallocf, lua_setallocf
-- TODO: Debugger functions

-- Some of the Lua functions may call a Haskell function, and trigger
-- garbage collection, rescheduling etc. This means we must declare these
-- functions as 'safe'.


--------------------------------------------------------------------------------
-- * State manipulation

-- lua_newstate is currently not supported.

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_close lua_close>
foreign import ccall "lua.h lua_close"
  lua_close :: LuaState -> IO ()

-- lua_newthread is currently not supported.


--------------------------------------------------------------------------------
-- * Basic stack manipulation

#if LUA_VERSION_NUMBER >= 502
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_absindex lua_absindex>
foreign import ccall unsafe "lua.h lua_absindex"
  lua_absindex :: LuaState -> StackIndex -> IO StackIndex
#endif

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_gettop lua_gettop>
foreign import ccall unsafe "lua.h lua_gettop"
  lua_gettop :: LuaState -> IO StackIndex

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_settop lua_settop>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_settop"
#else
foreign import ccall safe "lua.h lua_settop"
#endif
  lua_settop :: LuaState -> StackIndex -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushvalue lua_pushvalue>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushvalue"
#else
foreign import ccall safe "lua.h lua_pushvalue"
#endif
  lua_pushvalue :: LuaState -> StackIndex -> IO ()

#if LUA_VERSION_NUMBER >= 503
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rotate lua_rotate>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rotate"
#else
foreign import ccall "lua.h lua_rotate"
#endif
  lua_rotate :: LuaState -> StackIndex -> CInt -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_copy lua_copy>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_copy"
#else
foreign import ccall "lua.h lua_copy"
#endif
  lua_copy :: LuaState -> StackIndex -> StackIndex -> IO ()
#else
-- | See <https://www.lua.org/manual/5.2/manual.html#lua_remove lua_remove>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_remove"
#else
foreign import ccall safe "lua.h lua_remove"
#endif
  lua_remove :: LuaState -> StackIndex -> IO ()

-- | See <https://www.lua.org/manual/5.2/manual.html#lua_insert lua_insert>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_insert"
#else
foreign import ccall safe "lua.h lua_insert"
#endif
  lua_insert :: LuaState -> StackIndex -> IO ()

-- | See <https://www.lua.org/manual/5.2/manual.html#lua_replace lua_replace>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_replace"
#else
foreign import ccall safe "lua.h lua_replace"
#endif
  lua_replace :: LuaState -> StackIndex -> IO ()
#endif

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_checkstack lua_checkstack>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_checkstack"
#else
foreign import ccall safe "lua.h lua_checkstack"
#endif
  lua_checkstack :: LuaState -> StackIndex -> IO LuaBool

-- lua_xmove is currently not supported.


--------------------------------------------------------------------------------
-- * Stack access functions

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_isnumber lua_isnumber>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_isnumber"
#else
foreign import ccall safe "lua.h lua_isnumber"
#endif
  lua_isnumber :: LuaState -> StackIndex -> IO LuaBool

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_isstring lua_isstring>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_isstring"
#else
foreign import ccall safe "lua.h lua_isstring"
#endif
  lua_isstring :: LuaState -> StackIndex -> IO LuaBool

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_iscfunction lua_iscfunction>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_iscfunction"
#else
foreign import ccall safe "lua.h lua_iscfunction"
#endif
  lua_iscfunction :: LuaState -> StackIndex -> IO LuaBool

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_isuserdata lua_isuserdata>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_isuserdata"
#else
foreign import ccall safe "lua.h lua_isuserdata"
#endif
  lua_isuserdata :: LuaState -> StackIndex -> IO LuaBool

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_type lua_type>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_type"
#else
foreign import ccall safe "lua.h lua_type"
#endif
  lua_type :: LuaState -> StackIndex -> IO TypeCode

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_typename lua_typename>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_typename"
#else
foreign import ccall safe "lua.h lua_typename"
#endif
  lua_typename :: LuaState -> TypeCode -> IO (Ptr CChar)

-- lua_compare is unsafe (might cause a longjmp), use hslua_compare instead.
#if LUA_VERSION_NUM >= 502
-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_compare \
-- @lua_compare@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_compare"
  hslua_compare :: LuaState -> StackIndex -> StackIndex -> CInt
                -> IO (Failable LuaBool)
#else
-- | See <https://www.lua.org/manual/5.1/manual.html#lua_equal lua_equal>
foreign import ccall "lua.h lua_equal"
  lua_equal :: LuaState -> StackIndex -> StackIndex -> IO CInt

-- | See <https://www.lua.org/manual/5.1/manual.html#lua_lessthan lua_lessthan>
foreign import ccall "lua.h lua_lessthan"
  lua_lessthan :: LuaState -> StackIndex -> StackIndex -> IO CInt
#endif

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawequal lua_rawequal>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawequal"
#else
foreign import ccall safe "lua.h lua_rawequal"
#endif
  lua_rawequal :: LuaState -> StackIndex -> StackIndex -> IO LuaBool

--
-- Type coercion
--
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_toboolean lua_toboolean>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_toboolean"
#else
foreign import ccall safe "lua.h lua_toboolean"
#endif
  lua_toboolean :: LuaState -> StackIndex -> IO StackIndex

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_tocfunction lua_tocfunction>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tocfunction"
#else
foreign import ccall safe "lua.h lua_tocfunction"
#endif
  lua_tocfunction :: LuaState -> StackIndex -> IO CFunction

#if LUA_VERSION_NUMBER >= 502
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_tointegerx lua_tointegerx>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tointegerx"
#else
foreign import ccall safe "lua.h lua_tointegerx"
#endif
  lua_tointegerx :: LuaState -> StackIndex -> Ptr LuaBool -> IO LuaInteger

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_tonumberx lua_tonumberx>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tonumberx"
#else
foreign import ccall safe "lua.h lua_tonumberx"
#endif
  lua_tonumberx :: LuaState -> StackIndex -> Ptr LuaBool -> IO LuaNumber
#else
-- | See <https://www.lua.org/manual/5.1/manual.html#lua_tointeger lua_tointeger>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tointeger"
#else
foreign import ccall safe "lua.h lua_tointeger"
#endif
  lua_tointeger :: LuaState -> StackIndex -> IO LuaInteger

-- | See <https://www.lua.org/manual/5.1/manual.html#lua_tonumber lua_tonumber>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tonumber"
#else
foreign import ccall safe "lua.h lua_tonumber"
#endif
  lua_tonumber :: LuaState -> StackIndex -> IO LuaNumber
#endif

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_tolstring lua_tolstring>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tolstring"
#else
foreign import ccall safe "lua.h lua_tolstring"
#endif
  lua_tolstring :: LuaState -> StackIndex -> Ptr CSize -> IO (Ptr CChar)

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_topointer lua_topointer>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_topointer"
#else
foreign import ccall safe "lua.h lua_topointer"
#endif
  lua_topointer :: LuaState -> StackIndex -> IO (Ptr ())

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_tothread lua_tothread>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_tothread"
#else
foreign import ccall safe "lua.h lua_tothread"
#endif
  lua_tothread :: LuaState -> StackIndex -> IO LuaState

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_touserdata lua_touserdata>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_touserdata"
#else
foreign import ccall safe "lua.h lua_touserdata"
#endif
  lua_touserdata :: LuaState -> StackIndex -> IO (Ptr a)


--
-- Object size
--

#if LUA_VERSION_NUMBER >= 502
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawlen lua_rawlen>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawlen"
#else
foreign import ccall safe "lua.h lua_rawlen"
#endif
  lua_rawlen :: LuaState -> StackIndex -> IO CSize
#else
-- | See <https://www.lua.org/manual/5.1/manual.html#lua_objlen lua_objlen>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_objlen"
#else
foreign import ccall safe "lua.h lua_objlen"
#endif
  lua_objlen :: LuaState -> StackIndex -> IO CSize
#endif


--------------------------------------------------------------------------------
-- * Push functions

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushnil lua_pushnil>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushnil"
#else
foreign import ccall safe "lua.h lua_pushnil"
#endif
  lua_pushnil :: LuaState -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushnumber lua_pushnumber>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushnumber"
#else
foreign import ccall safe "lua.h lua_pushnumber"
#endif
  lua_pushnumber :: LuaState -> LuaNumber -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushinteger lua_pushinteger>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushinteger"
#else
foreign import ccall safe "lua.h lua_pushinteger"
#endif
  lua_pushinteger :: LuaState -> LuaInteger -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushlstring lua_pushlstring>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushlstring"
#else
foreign import ccall safe "lua.h lua_pushlstring"
#endif
  lua_pushlstring :: LuaState -> Ptr CChar -> CSize -> IO ()

-- lua_pushstring is currently not supported. It's difficult to use in a haskell
-- context.

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushcclosure lua_pushcclosure>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushcclosure"
#else
foreign import ccall safe "lua.h lua_pushcclosure"
#endif
  lua_pushcclosure :: LuaState -> CFunction -> NumArgs -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushboolean lua_pushboolean>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushboolean"
#else
foreign import ccall safe "lua.h lua_pushboolean"
#endif
  lua_pushboolean :: LuaState -> LuaBool -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushlightuserdata lua_pushlightuserdata>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushlightuserdata"
#else
foreign import ccall safe "lua.h lua_pushlightuserdata"
#endif
  lua_pushlightuserdata :: LuaState -> Ptr a -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pushthread lua_pushthread>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_pushthread"
#else
foreign import ccall safe "lua.h lua_pushthread"
#endif
  lua_pushthread :: LuaState -> IO CInt


--------------------------------------------------------------------------------
-- * Get functions

-- lua_gettable is unsafe, use hslua_gettable instead.
-- lua_getfield is unsafe, use hslua_getfield instead.
-- lua_getglobal is unsafe, use hslua_getglobal instead.
-- lua_getfenv (5.1 only) is not supported.

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_gettable \
-- @lua_gettable@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_gettable"
  hslua_gettable :: LuaState -> StackIndex -> IO CInt

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_getfield \
-- @lua_getfield@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_getfield"
  hslua_getfield :: LuaState -> StackIndex -> Ptr CChar -> IO CInt

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawget lua_rawget>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawget"
#else
foreign import ccall safe "lua.h lua_rawget"
#endif
  lua_rawget :: LuaState -> StackIndex -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawgeti lua_rawgeti>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawgeti"
#else
foreign import ccall safe "lua.h lua_rawgeti"
#endif
  lua_rawgeti :: LuaState -> StackIndex -> CInt -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_createtable lua_createtable>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_createtable"
#else
foreign import ccall safe "lua.h lua_createtable"
#endif
  lua_createtable :: LuaState -> CInt -> CInt -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_newuserdata lua_newuserdata>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_newuserdata"
#else
foreign import ccall safe "lua.h lua_newuserdata"
#endif
  lua_newuserdata :: LuaState -> CInt -> IO (Ptr ())

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_getmetatable lua_getmetatable>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_getmetatable"
#else
foreign import ccall safe "lua.h lua_getmetatable"
#endif
  lua_getmetatable :: LuaState -> StackIndex -> IO CInt

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_getglobal \
-- @lua_getglobal@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_getglobal"
  hslua_getglobal :: LuaState -> Ptr CChar -> IO CInt


--------------------------------------------------------------------------------
-- * Set functions

-- lua_settable is unsafe, use hslua_settable instead.
-- lua_setfield is unsafe, use hslua_setfield instead.
-- lua_setglobal is unsafe, use hslua_setglobal instead.
-- lua_setfenv (5.1 only) is not supported.

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_settable \
-- @lua_settable@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_settable"
  hslua_settable :: LuaState -> StackIndex -> IO CInt

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_setfield \
-- @lua_setfield@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_setfield"
  hslua_setfield :: LuaState -> StackIndex -> Ptr CChar -> IO CInt

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawset lua_rawset>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawset"
#else
foreign import ccall safe "lua.h lua_rawset"
#endif
  lua_rawset :: LuaState -> StackIndex -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_rawseti lua_rawseti>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_rawseti"
#else
foreign import ccall safe "lua.h lua_rawseti"
#endif
  lua_rawseti :: LuaState -> StackIndex -> CInt -> IO ()

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_setmetatable lua_setmetatable>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lua.h lua_setmetatable"
#else
foreign import ccall safe "lua.h lua_setmetatable"
#endif
  lua_setmetatable :: LuaState -> StackIndex -> IO ()

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_setglobal \
-- @lua_setglobal@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_setglobal"
  hslua_setglobal :: LuaState -> Ptr CChar -> IO CInt


--------------------------------------------------------------------------------
-- * 'load' and 'call' functions (load and run Lua code)

#if LUA_VERSION_NUMBER >= 502
-- | See <https://www.lua.org/manual/5.3/manual.html#lua_pcallk lua_pcallk>
foreign import ccall "lua.h lua_pcallk"
  lua_pcallk :: LuaState -> NumArgs -> NumResults -> StackIndex
             -> CInt -> Ptr () -> IO StatusCode
#else
-- | See <https://www.lua.org/manual/5.1/manual.html#lua_pcall lua_pcall>
foreign import ccall "lua.h lua_pcall"
  lua_pcall :: LuaState -> NumArgs -> NumResults -> StackIndex
            -> IO StatusCode
#endif

-- currently unsupported:
-- lua_load
-- lua_dump


------------------------------------------------------------------------------
-- * Coroutine functions

-- lua_yield / lua_yieldk and lua_resume are currently not supported.

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_status lua_status>
foreign import ccall unsafe "lua.h lua_status"
  lua_status :: LuaState -> IO StatusCode


------------------------------------------------------------------------------
-- * Garbage-collection functions and options

-- | See <https://www.lua.org/manual/5.3/manual.html#lua_gc lua_gc>
foreign import ccall "lua.h lua_gc"
  lua_gc :: LuaState -> CInt -> CInt -> IO CInt


------------------------------------------------------------------------------
-- * Miscellaneous functions

-- lua_error is unsafe in a haskell context and hence not supported.
-- lua_next is unsafe, use hslua_next instead.
-- lua_concat is unsafe (may trigger a longjmp), use hslua_concat instead.

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_next \
-- @lua_next@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_next"
  hslua_next :: LuaState -> StackIndex -> IO (Failable LuaBool)

-- | Wrapper around <https://lua.org/manual/5.3/manual.html#lua_concat \
-- @lua_concat@> which catches any @longjmp@s.
foreign import ccall "safer-api.h hslua_concat"
  hslua_concat :: LuaState -> NumArgs -> IO (Failable LuaBool)


------------------------------------------------------------------------------
-- * Lua Libraries

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_openlibs luaL_openlibs>
foreign import ccall unsafe "lualib.h luaL_openlibs"
  luaL_openlibs :: LuaState -> IO ()

-- | Point to function opening the base library.
foreign import ccall unsafe "lualib.h &luaopen_base"
  lua_open_base_ptr :: CFunction

-- | Point to function opening the table library.
foreign import ccall unsafe "lualib.h &luaopen_table"
  lua_open_table_ptr :: CFunction

-- | Point to function opening the io library.
foreign import ccall unsafe "lualib.h &luaopen_io"
  lua_open_io_ptr :: CFunction

-- | Point to function opening the os library.
foreign import ccall unsafe "lualib.h &luaopen_os"
  lua_open_os_ptr :: CFunction

-- | Point to function opening the string library.
foreign import ccall unsafe "lualib.h &luaopen_string"
  lua_open_string_ptr :: CFunction

-- | Point to function opening the math library.
foreign import ccall unsafe "lualib.h &luaopen_math"
  lua_open_math_ptr :: CFunction

-- | Point to function opening the debug library.
foreign import ccall unsafe "lualib.h &luaopen_debug"
  lua_open_debug_ptr :: CFunction

-- | Point to function opening the package library.
foreign import ccall unsafe "lualib.h &luaopen_package"
  lua_open_package_ptr :: CFunction


--------------------------------------------------------------------------------
-- * The Auxiliary Library

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_newstate luaL_newstate>
foreign import ccall unsafe "lauxlib.h luaL_newstate"
  luaL_newstate :: IO LuaState

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_newmetatable luaL_newmetatable>
foreign import ccall "lauxlib.h luaL_newmetatable"
  luaL_newmetatable :: LuaState -> Ptr CChar -> IO LuaBool

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_ref luaL_ref>
foreign import ccall "lauxlib.h luaL_ref"
  luaL_ref :: LuaState -> StackIndex -> IO CInt

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_unref luaL_unref>
foreign import ccall "lauxlib.h luaL_unref"
  luaL_unref :: LuaState -> StackIndex -> CInt -> IO ()

#if LUA_VERSION_NUMBER >= 502
-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_loadfilex luaL_loadfilex>
foreign import ccall "lauxlib.h luaL_loadfilex"
  luaL_loadfilex :: LuaState -> Ptr CChar -> Ptr CChar -> IO StatusCode
#else
-- | See <https://www.lua.org/manual/5.1/manual.html#luaL_loadfile luaL_loadfile>
foreign import ccall "lauxlib.h luaL_loadfile"
  luaL_loadfile :: LuaState -> Ptr CChar -> IO StatusCode
#endif

-- | See <https://www.lua.org/manual/5.3/manual.html#luaL_loadstring luaL_loadstring>
#ifdef ALLOW_UNSAFE_GC
foreign import ccall unsafe "lauxlib.h luaL_loadstring"
#else
foreign import ccall safe "lauxlib.h luaL_loadstring"
#endif
  luaL_loadstring :: LuaState -> Ptr CChar -> IO StatusCode

--------------------------------------------------------------------------------
-- * Error transformation (Haskell to Lua)
foreign import ccall "safer-api.h &hslua_call_hs"
  hslua_call_hs_ptr :: CFunction