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--
-- A script to translate the pcre.c testsuite into Haskell
--
import System.Environment
import System.IO
import Data.Char
import Data.List
import Text.PrettyPrint.HughesPJ
data Test = Test String [String] [Maybe [String]]
deriving (Eq,Show,Read)
main = do
[f,g] <- getArgs
inf <- readFile f
outf <- readFile g
let in_str = lines inf
out_str = lines outf
let loop [] [] = []
loop i_xs o_xs = Test r subj results : loop (dropWhile (=="") i_ys)
(dropWhile (=="") o_ys)
where
((r:subj), i_ys) = break (== "") i_xs
((_:results'),o_ys) = break (== "") o_xs
results= [ if s == "No match"
then Nothing
else Just [s]
| s <- filter (not . all isSpace . take 2) results'
]
print . vcat . intersperse (char ',') . map ppr . loop in_str $ out_str
breakReg ('/':rest) =
let s = reverse . dropWhile (/= '/') . reverse $ rest
t = case head (reverse rest) of
'i' -> ["caseless"]
'/' -> []
_ -> ["ERROR"]
in if s == "" then ("ERROR", [])
else (init s, t)
breakReg ('"':rest) =
let s = reverse . dropWhile (/= '"') . reverse $ rest
t = case head (reverse rest) of
'i' -> ["caseless"]
'/' -> []
_ -> ["ERROR"]
in if s == "" then ("ERROR", [])
else (init s, t)
breakReg s = ("ERROR", [])
ppr :: Test -> Doc
ppr (Test r subjs res) =
hang (empty <+> text "testRegex" <+> text
(show (fst $ breakReg r)) <+>
bracket (case snd (breakReg r) of
[] -> empty
[x] -> text x
))
4 $
(bracket $ vcat $ punctuate (char ',') (map (text.show) subjs))
$+$
(bracket $ vcat $ punctuate (char ',') (map (text.show) res))
bracket x = char '[' <> x <> char ']'
|
