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module Grasp.Interpreter (
grasp
) where
import qualified System.Random as Random
import qualified Control.Monad as Monad
import Control.Monad.IO.Class( liftIO )
import qualified Data.Maybe as Maybe
import Data.List( (!!) )
import qualified Data.List as List
import Grasp.Monad( GraspM )
import qualified Grasp.Monad as GMonad
import Grasp.Types.GNode( GNode )
import qualified Grasp.Types.GNode as GN
import Grasp.Types.GEdge( GEdge )
import qualified Grasp.Types.GEdge as GE
import Grasp.Types.Instruction( Instruction )
import qualified Grasp.Types.Instruction as IN
import Grasp.Types.EdgeLabel( EdgeLabel )
import qualified Grasp.Types.EdgeLabel as EL
grasp :: ([GNode],[GEdge]) -> IO ([GNode],[GEdge])
grasp input = GMonad.finalise $ GMonad.construct input >> interpret
interpret :: GraspM ()
interpret = do
n <- GMonad.peekIP
if (Maybe.isNothing n) then return () else do
case (IN.toString . GN.toInst . Maybe.fromJust $ n) of
"set" -> setI
"new" -> newI
"del" -> delI
"push" -> pushI
"pop" -> popI
"pick" -> pickI
"call" -> callI
"ret" -> retI
"add" -> addI
"mul" -> mulI
"sub" -> subI
"div" -> divI
"mod" -> modI
"getc" -> getcI
"putc" -> putcI
"gets" -> getsI
"puts" -> putsI
inst | Maybe.isJust . IN.toInt . IN.mk $ inst -> implicitPushI
x -> error ("Unknown instruction " ++ x)
GMonad.nextIP
interpret
setI :: GraspM ()
setI = do
curNode <- GMonad.peekIP >>= return . Maybe.fromJust
inNodes <- GMonad.nodesOut (EL.mk "in") curNode
outNodes <- GMonad.nodesOut (EL.mk "out") curNode
Monad.when (length inNodes /= 0) (do
r <- liftIO (Random.getStdRandom (Random.randomR (0, length inNodes - 1)))
mapM_ (GMonad.reLabel (GN.toInst (inNodes !! r))) outNodes )
GMonad.updateIP
newI :: GraspM ()
newI = do
curNode <- GMonad.peekIP >>= return . Maybe.fromJust
tailNodes <- GMonad.nodesOut (EL.mk "tail") curNode
headNodes <- GMonad.nodesOut (EL.mk "head") curNode
labelNodes <- GMonad.nodesOut (EL.mk "label") curNode
Monad.when (length tailNodes /= 1) (error "Instruction new should have one tail argument")
Monad.when (length headNodes /= 1) (error "Instruction new should have one head argument")
Monad.when (length labelNodes /= 1) (error "Instruction new should have one label argument")
Monad.when (Maybe.isJust . IN.toFloat . GN.toInst $ (head labelNodes))
(error "Label argument to instruction new should not be a number")
let edgeLabel = EL.mk . IN.toString . GN.toInst $ (head labelNodes)
GMonad.insEdge (GE.mk (GN.toNode (head tailNodes), GN.toNode (head headNodes), edgeLabel))
GMonad.updateIP
delI :: GraspM ()
delI = GMonad.updateIP
pushI :: GraspM ()
pushI = GMonad.updateIP
implicitPushI :: GraspM ()
implicitPushI = GMonad.updateIP
popI :: GraspM ()
popI = GMonad.updateIP
pickI :: GraspM ()
pickI = GMonad.updateIP
callI :: GraspM ()
callI = GMonad.updateIP
retI :: GraspM ()
retI = GMonad.updateIP
addI :: GraspM ()
addI = GMonad.updateIP
mulI :: GraspM ()
mulI = GMonad.updateIP
subI :: GraspM ()
subI = GMonad.updateIP
divI :: GraspM ()
divI = GMonad.updateIP
modI :: GraspM ()
modI = GMonad.updateIP
getcI :: GraspM ()
getcI = GMonad.updateIP
putcI :: GraspM ()
putcI = GMonad.updateIP
getsI :: GraspM ()
getsI = GMonad.updateIP
putsI :: GraspM ()
putsI = GMonad.updateIP
|
