author | koda |
Wed, 03 Apr 2013 00:46:19 +0200 | |
changeset 8835 | 01bcf9ea68c1 |
parent 8138 | cfb228baa598 |
permissions | -rw-r--r-- |
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module PascalPreprocessor where |
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import Text.Parsec |
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import Control.Monad.IO.Class |
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import Control.Monad |
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import System.IO |
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import qualified Data.Map as Map |
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import Data.Char |
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-- comments are removed |
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comment = choice [ |
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char '{' >> notFollowedBy (char '$') >> manyTill anyChar (try $ char '}') >> return "" |
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, (try $ string "(*") >> manyTill anyChar (try $ string "*)") >> return "" |
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, (try $ string "//") >> manyTill anyChar (try newline) >> return "\n" |
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] |
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initDefines = Map.fromList [ |
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("FPC", "") |
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, ("PAS2C", "") |
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, ("ENDIAN_LITTLE", "") |
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] |
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preprocess :: String -> IO String |
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preprocess fn = do |
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- Parse unions, sets, function type, packed arrays and some more imporvements to the parser. Now it parses uVariable, uConsts and even SDLh.pas
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r <- runParserT (preprocessFile fn) (initDefines, [True]) "" "" |
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case r of |
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(Left a) -> do |
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hPutStrLn stderr (show a) |
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return "" |
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(Right a) -> return a |
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where |
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preprocessFile fn = do |
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f <- liftIO (readFile fn) |
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setInput f |
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preprocessor |
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preprocessor, codeBlock, switch :: ParsecT String (Map.Map String String, [Bool]) IO String |
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preprocessor = chainr codeBlock (return (++)) "" |
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codeBlock = do |
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s <- choice [ |
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switch |
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, comment |
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, char '\'' >> many (noneOf "'\n") >>= \s -> char '\'' >> return ('\'' : s ++ "'") |
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, identifier >>= replace |
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, noneOf "{" >>= \a -> return [a] |
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] |
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(_, ok) <- getState |
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return $ if and ok then s else "" |
8474b7fa84d6
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--otherChar c = c `notElem` "{/('_" && not (isAlphaNum c) |
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identifier = do |
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c <- letter <|> oneOf "_" |
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s <- many (alphaNum <|> oneOf "_") |
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return $ c:s |
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switch = do |
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try $ string "{$" |
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s <- choice [ |
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include |
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, ifdef |
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Countless imporvements to the parser and countless help to the parser in sources.
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, if' |
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, elseSwitch |
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, endIf |
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, define |
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, unknown |
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] |
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return s |
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include = do |
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try $ string "INCLUDE" |
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spaces |
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(char '"') |
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fn <- many1 $ noneOf "\"\n" |
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char '"' |
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spaces |
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char '}' |
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f <- liftIO (readFile fn `catch` error ("File not found: " ++ fn)) |
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c <- getInput |
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setInput $ f ++ c |
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return "" |
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ifdef = do |
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s <- try (string "IFDEF") <|> try (string "IFNDEF") |
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let f = if s == "IFNDEF" then not else id |
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spaces |
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- Parse unions, sets, function type, packed arrays and some more imporvements to the parser. Now it parses uVariable, uConsts and even SDLh.pas
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d <- identifier |
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spaces |
8474b7fa84d6
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char '}' |
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updateState $ \(m, b) -> |
8474b7fa84d6
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(m, (f $ d `Map.member` m) : b) |
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return "" |
6453
11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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if' = do |
11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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s <- try (string "IF" >> notFollowedBy alphaNum) |
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Countless imporvements to the parser and countless help to the parser in sources.
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manyTill anyChar (char '}') |
11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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--char '}' |
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Countless imporvements to the parser and countless help to the parser in sources.
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updateState $ \(m, b) -> |
11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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(m, False : b) |
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11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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return "" |
11c578d30bd3
Countless imporvements to the parser and countless help to the parser in sources.
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Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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elseSwitch = do |
8474b7fa84d6
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try $ string "ELSE}" |
8474b7fa84d6
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updateState $ \(m, b:bs) -> (m, (not b):bs) |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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return "" |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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endIf = do |
8474b7fa84d6
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try $ string "ENDIF}" |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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updateState $ \(m, b:bs) -> (m, bs) |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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return "" |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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define = do |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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try $ string "DEFINE" |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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spaces |
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i <- identifier |
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d <- ((string ":=" >> return ()) <|> spaces) >> many (noneOf "}") |
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Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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char '}' |
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A solution to char vs string problem: mark single-letter strings with _S macro
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updateState $ \(m, b) -> (if (and b) && (head i /= '_') then Map.insert i d m else m, b) |
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Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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return "" |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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replace s = do |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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(m, _) <- getState |
8474b7fa84d6
Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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return $ Map.findWithDefault s s m |
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unknown = do |
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fn <- many1 $ noneOf "}\n" |
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char '}' |
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Finish preprocessor. Now it correctly handles $IFDEF, $IFNDEF, $ELSE, $ENDIF and $DEFINE.
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return $ "{$" ++ fn ++ "}" |