new GFCC format in GF/GFCC

src/GF/GFCC/API.hs

@@ -0,0 +1,129 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : GFCCAPI
+-- Maintainer  : Aarne Ranta
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 
+-- > CVS $Author: 
+-- > CVS $Revision: 
+--
+-- Reduced Application Programmer's Interface to GF, meant for
+-- embedded GF systems. AR 19/9/2007
+-----------------------------------------------------------------------------
+
+module  GF.GFCC.API where
+
+import GF.GFCC.DataGFCC
+import GF.GFCC.AbsGFCC
+import GF.GFCC.ParGFCC
+import GF.GFCC.PrintGFCC
+import GF.GFCC.ErrM
+import GF.GFCC.Generate
+----import GF.Parsing.FCFG
+----import GF.Conversion.SimpleToFCFG (convertGrammar,FCat(..))
+
+--import GF.Data.Operations
+--import GF.Infra.UseIO
+import qualified Data.Map as Map
+import System.Random (newStdGen)
+import System.Directory (doesFileExist)
+
+
+-- This API is meant to be used when embedding GF grammars in Haskell 
+-- programs. The embedded system is supposed to use the
+-- .gfcm grammar format, which is first produced by the gf program.
+
+---------------------------------------------------
+-- Interface
+---------------------------------------------------
+
+----data MultiGrammar = MultiGrammar {gfcc :: GFCC, parsers :: [(Language,FCFPInfo)]}
+data MultiGrammar = MultiGrammar {gfcc :: GFCC, parsers :: [(Language,())]}
+type Language     = String
+type Category     = String
+type Tree         = Exp
+
+file2grammar :: FilePath -> IO MultiGrammar
+
+linearize    :: MultiGrammar -> Language -> Tree -> String
+parse        :: MultiGrammar -> Language -> Category -> String -> [Tree]
+
+linearizeAll     :: MultiGrammar -> Tree -> [String]
+linearizeAllLang :: MultiGrammar -> Tree -> [(Language,String)]
+
+parseAll     :: MultiGrammar -> Category -> String -> [[Tree]]
+parseAllLang :: MultiGrammar -> Category -> String -> [(Language,[Tree])]
+
+generateAll    :: MultiGrammar -> Category -> [Tree]
+generateRandom :: MultiGrammar -> Category -> IO [Tree]
+
+readTree   :: MultiGrammar -> String -> Tree
+showTree   ::                 Tree -> String
+
+languages  :: MultiGrammar -> [Language]
+categories :: MultiGrammar -> [Category]
+
+startCat   :: MultiGrammar -> Category
+
+---------------------------------------------------
+-- Implementation
+---------------------------------------------------
+
+file2grammar f = do
+  gfcc <- file2gfcc f
+----  let fcfgs = convertGrammar gfcc
+----  return (MultiGrammar gfcc [(lang, buildFCFPInfo fcfg) | (CId lang,fcfg) <- fcfgs])
+  return (MultiGrammar gfcc [])
+
+file2gfcc f =
+  readFileIf f >>= err (error) (return . mkGFCC) . pGrammar . myLexer
+
+linearize mgr lang = GF.GFCC.DataGFCC.linearize (gfcc mgr) (CId lang)
+
+parse mgr lang cat s = error "no parser"
+----parse mgr lang cat s = 
+----  case lookup lang (parsers mgr) of
+----    Nothing    -> error "no parser"
+----    Just pinfo -> case parseFCF "bottomup" pinfo (CId cat) (words s) of
+----                    Ok x -> x
+----                    Bad s -> error s
+
+linearizeAll mgr = map snd . linearizeAllLang mgr
+linearizeAllLang mgr t = 
+  [(lang,linearThis mgr lang t) | lang <- languages mgr]
+
+parseAll mgr cat = map snd . parseAllLang mgr cat
+
+parseAllLang mgr cat s = 
+  [(lang,ts) | lang <- languages mgr, let ts = parse mgr lang cat s, not (null ts)]
+
+generateRandom mgr cat = do
+  gen <- newStdGen
+  return $ genRandom gen (gfcc mgr) (CId cat)
+
+generateAll mgr cat = generate (gfcc mgr) (CId cat)
+
+readTree _ = err (const exp0) id . (pExp . myLexer)
+
+showTree t = printTree t
+
+languages mgr = [l | CId l <- cncnames (gfcc mgr)]
+
+categories mgr = [c | CId c <- Map.keys (cats (abstract (gfcc mgr)))]
+
+startCat mgr = "S" ----
+
+------------ for internal use only
+
+linearThis = GF.GFCC.API.linearize
+
+err f g ex = case ex of
+  Ok x -> g x
+  Bad s -> f s
+
+readFileIf f = do
+  b <- doesFileExist f
+  if b then readFile f 
+       else putStrLn ("file " ++ f ++ " not found") >> return ""