97 lines
2.4 KiB
Haskell
97 lines
2.4 KiB
Haskell
--
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-- Copyright (C) 2004 Don Stewart - http://www.cse.unsw.edu.au/~dons
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--
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-- This library is free software; you can redistribute it and/or
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-- modify it under the terms of the GNU Lesser General Public
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-- License as published by the Free Software Foundation; either
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-- version 2.1 of the License, or (at your option) any later version.
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--
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-- This library is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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-- Lesser General Public License for more details.
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--
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-- You should have received a copy of the GNU Lesser General Public
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-- License along with this library; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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-- USA
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--
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--
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-- compile and run haskell strings at runtime.
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--
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module System.Eval.Utils (
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Import,
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symbol,
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escape,
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getPaths,
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mkUniqueWith,
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cleanup,
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module Data.Maybe,
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module Control.Monad,
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) where
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import System.Plugins.Load ( Symbol )
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import System.Plugins.Utils
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import System.IO
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import System.Directory
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import Data.Char
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--
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-- we export these so that eval() users have a nice time
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--
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import Data.Maybe
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import Control.Monad
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--
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-- imports Foo's
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--
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type Import = String
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--
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-- distinguished symbol name
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--
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symbol :: Symbol
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symbol = "resource"
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--
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-- turn a Haskell string into a printable version of the same string
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--
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escape s = concatMap (\c -> showLitChar c $ "") s
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--
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-- For Dynamic eval's, work out the compile and load command lines
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--
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getPaths :: IO ([String],[String])
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getPaths = do
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let make_line = ["-Onot","-fglasgow-exts","-package","plugins"]
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return (make_line,[])
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-- ---------------------------------------------------------------------
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-- create the tmp file, and write source into it, using wrapper to
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-- create extra .hs src.
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--
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mkUniqueWith :: (String -> String -> [Import] -> String)
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-> String
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-> [Import] -> IO FilePath
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mkUniqueWith wrapper src mods = do
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(tmpf,hdl) <- hMkUnique
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let nm = mkModid (basename tmpf) -- used as a module name
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src' = wrapper src nm mods
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hPutStr hdl src' >> hFlush hdl >> hClose hdl >> return tmpf
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--
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-- remove all the tmp files
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--
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cleanup :: String -> String -> IO ()
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cleanup a b = mapM_ removeFile [a, b, replaceSuffix b ".hi"]
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