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module Main( main ) where
import System.Console.GetOpt
import System.Environment
import System.Exit
import System.IO
import Data.Maybe( fromMaybe, isJust, fromJust )
import Data.List (find, intercalate)
import Control.Monad
import Pas2C
main = do
args <- getArgs
if length args == 0
then do
name <- getProgName
hPutStrLn stderr $ usageInfo header options
exitFailure
else do
case getOpt RequireOrder options args of
(flags, [], []) | enoughFlags flags -> do
let m = flag flags isName
let i = flag flags isInput
let o = flag flags isOutput
let a = fromMaybe o $ liftM extractString $ find isAlt flags
let symbols = ["PAS2C", "FPC"] ++ (map extractString $ filter isSymbol flags)
hPutStrLn stdout $ "--------Pas2C Config--------"
hPutStrLn stdout $ "Main module: " ++ m
hPutStrLn stdout $ "Input path : " ++ i
hPutStrLn stdout $ "Output path: " ++ o
hPutStrLn stdout $ "Altern path: " ++ a
hPutStrLn stdout $ "Symbols defined: " ++ (intercalate ", " symbols)
hPutStrLn stdout $ "----------------------------"
pas2C m (i++"/") (o++"/") (a++"/") symbols
hPutStrLn stdout $ "----------------------------"
| otherwise -> error $ usageInfo header options
(_, nonOpts, []) -> error $ "unrecognized arguments: " ++ unwords nonOpts
(_, _, msgs) -> error $ usageInfo header options
where
header = "Freepascal to C conversion! Please specify -n -i -o options.\n"
enoughFlags f = and $ map (isJust . flip find f) [isName, isInput, isOutput]
flag f = extractString . fromJust . flip find f
data Flag = HelpMessage
| Name String
| Input String
| Output String
| Alternate String
| Symbol String
extractString :: Flag -> String
extractString (Name s) = s
extractString (Input s) = s
extractString (Output s) = s
extractString (Alternate s) = s
extractString (Symbol s) = s
extractString _ = undefined
isName, isInput, isOutput, isAlt, isSymbol :: Flag -> Bool
isName (Name _) = True
isName _ = False
isInput (Input _) = True
isInput _ = False
isOutput (Output _) = True
isOutput _ = False
isAlt (Alternate _) = True
isAlt _ = False
isSymbol (Symbol _) = True
isSymbol _ = False
options :: [OptDescr Flag]
options = [
Option ['h'] ["help"] (NoArg HelpMessage) "print this help message",
Option ['n'] ["name"] (ReqArg Name "MAIN") "name of the main Pascal module",
Option ['i'] ["input"] (ReqArg Input "DIR") "input directory, where .pas files will be read",
Option ['o'] ["output"] (ReqArg Output "DIR") "output directory, where .c/.h files will be written",
Option ['a'] ["alternate"] (ReqArg Alternate "DIR") "alternate input directory, for out of source builds",
Option ['d'] ["define"] (ReqArg Symbol "SYMBOL") "define symbol"
]
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