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--
-- Haddock - A Haskell Documentation Tool
--
-- (c) Simon Marlow 2003
--
module Haddock.InterfaceFile (
InterfaceFile(..),
writeInterfaceFile,
readInterfaceFile,
iface2interface
) where
import Haddock.Types
import Haddock.Exception
import Data.List
import Data.Word
import Data.Array
import Data.IORef
import qualified Data.Map as Map
import System.IO
import Control.Monad
import GHC
import SrcLoc ( noSrcSpan ) -- tmp, GHC now exports this
import Binary
import Name
import UniqSupply
import UniqFM
import IfaceEnv
import Module
import Packages
import HscTypes
import FastMutInt
import InstEnv
import HsDoc
data InterfaceMod = InterfaceMod {
imModule :: Module,
imFilename :: FilePath,
imExportItems :: [ExportItem DocName]
}
data InterfaceFile = InterfaceFile {
ifLinkEnv :: LinkEnv,
ifModules :: [Module]
}
instance Binary InterfaceFile where
put_ bh (InterfaceFile env mods) = do
put_ bh (Map.toList env)
put_ bh mods
get bh = do
env <- get bh
mods <- get bh
return (InterfaceFile (Map.fromList env) mods)
iface2interface iface = InterfaceMod {
imModule = ifaceMod iface,
imFilename = ifaceOrigFilename iface,
imExportItems = ifaceRnExportItems iface
}
binaryInterfaceMagic = 0xD0Cface :: Word32
binaryInterfaceVersion = 0 :: Word16
initBinMemSize = (1024*1024) :: Int
writeInterfaceFile :: FilePath -> InterfaceFile -> IO ()
writeInterfaceFile filename iface = do
bh <- openBinMem initBinMemSize
put_ bh binaryInterfaceMagic
put_ bh binaryInterfaceVersion
-- remember where the dictionary pointer will go
dict_p_p <- tellBin bh
put_ bh dict_p_p
-- remember where the symbol table pointer will go
symtab_p_p <- tellBin bh
put_ bh symtab_p_p
-- Make some intial state
ud <- newWriteState
-- put the main thing
bh <- return $ setUserData bh ud
put_ bh iface
-- write the symtab pointer at the fornt of the file
symtab_p <- tellBin bh
putAt bh symtab_p_p symtab_p
seekBin bh symtab_p
-- write the symbol table itself
symtab_next <- readFastMutInt (ud_symtab_next ud)
symtab_map <- readIORef (ud_symtab_map ud)
putSymbolTable bh symtab_next symtab_map
-- write the dictionary pointer at the fornt of the file
dict_p <- tellBin bh
putAt bh dict_p_p dict_p
seekBin bh dict_p
-- write the dictionary itself
dict_next <- readFastMutInt (ud_dict_next ud)
dict_map <- readIORef (ud_dict_map ud)
putDictionary bh dict_next dict_map
-- snd send the result to the file
writeBinMem bh filename
return ()
readInterfaceFile :: FilePath -> IO (Either String InterfaceFile)
readInterfaceFile filename = do
bh <- readBinMem filename
magic <- get bh
version <- get bh
case () of
_ | magic /= binaryInterfaceMagic -> return . Left $
"Magic number mismatch: couldn't load interface file: " ++ filename
| version /= binaryInterfaceVersion -> return . Left $
"Interface file is of wrong version: " ++ filename
| otherwise -> do
-- get the dictionary
dict_p <- get bh
data_p <- tellBin bh
seekBin bh dict_p
dict <- getDictionary bh
seekBin bh data_p
-- initialise the user-data field of bh
ud <- newReadState dict
bh <- return (setUserData bh ud)
-- get the symbol table
symtab_p <- get bh
data_p <- tellBin bh
seekBin bh symtab_p
-- (construct an empty name cache)
u <- mkSplitUniqSupply 'a' -- ??
let nc = initNameCache u []
(_, symtab) <- getSymbolTable bh nc
seekBin bh data_p
-- set the symbol table
let ud = getUserData bh
bh <- return $! setUserData bh ud{ud_symtab = symtab}
-- load the actual data
iface <- get bh
return (Right iface)
-------------------------------------------------------------------------------
-- Symbol table
-------------------------------------------------------------------------------
putSymbolTable :: BinHandle -> Int -> UniqFM (Int,Name) -> IO ()
putSymbolTable bh next_off symtab = do
put_ bh next_off
let names = elems (array (0,next_off-1) (eltsUFM symtab))
mapM_ (\n -> serialiseName bh n symtab) names
getSymbolTable :: BinHandle -> NameCache -> IO (NameCache, Array Int Name)
getSymbolTable bh namecache = do
sz <- get bh
od_names <- sequence (replicate sz (get bh))
let
arr = listArray (0,sz-1) names
(namecache', names) =
mapAccumR (fromOnDiskName arr) namecache od_names
--
return (namecache', arr)
type OnDiskName = (PackageId, ModuleName, OccName)
fromOnDiskName
:: Array Int Name
-> NameCache
-> OnDiskName
-> (NameCache, Name)
fromOnDiskName arr nc (pid, mod_name, occ) =
let
mod = mkModule pid mod_name
cache = nsNames nc
in
case lookupOrigNameCache cache mod occ of
Just name -> (nc, name)
Nothing ->
let
us = nsUniqs nc
uniq = uniqFromSupply us
name = mkExternalName uniq mod occ noSrcSpan
new_cache = extendNameCache cache mod occ name
in
case splitUniqSupply us of { (us',_) ->
( nc{ nsUniqs = us', nsNames = new_cache }, name )
}
serialiseName :: BinHandle -> Name -> UniqFM (Int,Name) -> IO ()
serialiseName bh name symtab = do
let mod = nameModule name
put_ bh (modulePackageId mod, moduleName mod, nameOccName name)
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