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added the minimal Haskell API for storing expressions/triples in the semantic graph

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krasimir
2015-09-02 07:12:36 +00:00
parent 4a1da62d84
commit 73b41687c8
6 changed files with 321 additions and 137 deletions
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39
src/runtime/haskell-bind/SG/FFI.hs Normal file
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{-# LANGUAGE ForeignFunctionInterface, MagicHash #-}
module SG.FFI where
import Foreign
import Foreign.C
import PGF2.FFI
import GHC.Ptr
import Data.Int
data SgSG
type SgId = Int64
foreign import ccall "sg/sg.h sg_open"
sg_open :: CString -> Ptr GuExn -> IO (Ptr SgSG)
foreign import ccall "sg/sg.h sg_close"
sg_close :: Ptr SgSG -> Ptr GuExn -> IO ()
foreign import ccall "sg/sg.h sg_begin_trans"
sg_begin_trans :: Ptr SgSG -> Ptr GuExn -> IO ()
foreign import ccall "sg/sg.h sg_commit"
sg_commit :: Ptr SgSG -> Ptr GuExn -> IO ()
foreign import ccall "sg/sg.h sg_rollback"
sg_rollback :: Ptr SgSG -> Ptr GuExn -> IO ()
foreign import ccall "sg/sg.h sg_insert_expr"
sg_insert_expr :: Ptr SgSG -> PgfExpr -> Ptr GuExn -> IO SgId
foreign import ccall "sg/sg.h sg_insert_triple"
sg_insert_triple :: Ptr SgSG -> SgTriple -> Ptr GuExn -> IO SgId
type SgTriple = Ptr SgId
withTriple :: (SgTriple -> IO a) -> IO a
withTriple = allocaArray 3
gu_exn_type_SgError = Ptr "SgError"# :: CString