{- |

Module : ./CSL/EvalSpec.hs

Description : EvalSpec program

Copyright : (c) Ewaryst Schulz, DFKI Bremen 2010

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : ewaryst.schulz@dfki.de

Stability : experimental

Portability : non-portable (via imports)

Program for evaluating EnCL specifications

-}

module Main (main, runMain) where

import System.Environment

import System.Console.GetOpt

import qualified Interfaces.Process as PC

import CSL.AnEvenTool (evalWithVerification, CAS (..), CASState (..), runTool)

import Common.Utils

import Data.Bits

import Data.Maybe

import Data.List

import Control.Monad

main :: IO ()

main = getArgs >>= runMain True >> putStr ""

-- main = runTool >> return ()

runMain :: Bool -> [String] -> IO (Maybe CASState)

runMain cl args =

case processArgs args of

Left msg -> do

putStrLn $ "Evaluation: " ++ msg ++ "\n\n" ++ esUsage

return Nothing

Right st -> liftM Just $ runProg cl st

runProg :: Bool -> ProgSettings -> IO CASState

runProg cl st =

evalWithVerification cl

(cas st)

(logFile st)

(connectionName st)

(symbolicmode st)

(debugmode st)

(timeout st)

(verbosity st)

(lib st)

(spec st)

-- ----------------------- Input Arguments -------------------------

processArgs :: [String] -> Either String ProgSettings

processArgs args =

let (flags, noopts, unrecopts, errs) =

getOpt' (ReturnInOrder PFLib) options args

msgl = checkFlags flags

f str (l, s) = if null l then str else str ++ "\n" ++ s ++ unlines l

msg = foldl f ""

[ (noopts, "non-handled extra arguments encountered ")

, (unrecopts, "unrecognized flags encountered ")

, (errs, "")

, (msgl, "")

]

in if null msg then Right $ getSettings flags else Left msg

esHeader :: String

esHeader = unlines

[ "Usage: evalspec [OPTION...] [file]"

, ""

, "evalspec /tmp/f.het -sFlangeComplete"

, ""

]

esUsage :: String

esUsage = usageInfo esHeader options

{- | 'options' describes all available options and is used to generate usage

information -}

options :: [OptDescr ProgFlag]

-- Option [Char] [String] (ArgDescr a) String

options = map f

[ ( "lib", "Path to the hets file", ReqArg PFLib "FILE")

, ( "spec"

, "Name of specification importing both, " ++

"the pattern and the design specification"

, ReqArg PFSpec "SPECNAME")

, ( "CAS"

, "Name of the computer algebra system to " ++

"carry out the computations"

, ReqArg (PFCAS . fromMaybe (error "Unknown CAS") . readMaybe)

"Mathematica or Maple")

, ( "Logfile"

, "Path to a logfile which will contain low " ++

"level CAS connection information"

, ReqArg PFLogFile "FILE")

, ( "connection"

, "A connection name as given e.g. to the MathLink server"

, ReqArg PFConnection "String")

, ( "timeout"

, "Timeout for communication with external CAS " ++

"system in deziseconds (tenth of a second)"

, ReqArg (PFTimeout . fromRational

. fromMaybe (error "Could not parse timeout")

. (readMaybe :: String -> Maybe Rational)

. (++ "%10")) "1-1000")

, ( "verbosity"

, "A value from 0=quiet to 4=print out all " ++

"information during processing"

, ReqArg (PFVerbosity . read) "0-4")

, ( "quiet", "Equal to -v0", NoArg PFQuiet)

, ( "Symbolic", "Enables symbolic evaluation mode",

NoArg (PFSymbolic True))

, ( "debug", "Enables debug mode", NoArg (PFDebug True))

] where

f (fs, descr, arg) = Option [head fs] [fs] arg descr

checkFlags :: [ProgFlag] -> [String]

checkFlags = g . mapAccumL f (0 :: Int) where

f i (PFLib _) = (setBit i 0, ())

f i (PFSpec _) = (setBit i 1, ())

f i _ = (i, ())

g (i, _) = mapMaybe (h i) [ (0, "lib")

, (1, "spec") ]

h i (j, s)

| testBit i j = Nothing

| otherwise = Just $ s ++ " argument is missing"

data ProgSettings =

ProgSettings

{ lib :: String

, spec :: String

, cas :: CAS

, logFile :: Maybe FilePath

, connectionName :: Maybe String

, timeout :: PC.DTime

, verbosity :: Int

, debugmode :: Bool

, symbolicmode :: Bool

}

defaultSettings :: ProgSettings

defaultSettings = ProgSettings

{ lib = error "uninitialized settings"

, spec = error "uninitialized settings"

, cas = Maple

, timeout = 1

, verbosity = 4

, debugmode = False

, symbolicmode = False

, logFile = Nothing

, connectionName = Nothing

}

data ProgFlag =

PFLib String

| PFSpec String

| PFTimeout PC.DTime

| PFVerbosity Int

| PFLogFile FilePath

| PFConnection String

| PFCAS CAS

| PFQuiet

| PFDebug Bool

| PFSymbolic Bool

makeSettings :: ProgSettings -> ProgFlag -> ProgSettings

makeSettings settings flg =

case flg of

PFLib s -> settings { lib = s }

PFSpec s -> settings { spec = s }

PFVerbosity i -> settings { verbosity = i }

PFQuiet -> settings { verbosity = 0 }

PFTimeout t -> settings { timeout = t }

PFDebug b -> settings { debugmode = b }

PFSymbolic b -> settings { symbolicmode = b }

PFLogFile fp -> settings { logFile = Just fp }

PFConnection n -> settings { connectionName = Just n }

PFCAS c -> settings { cas = c }

getSettings :: [ProgFlag] -> ProgSettings

getSettings = foldl makeSettings defaultSettings