parse-dimacs (empty) → 1.0

raw patch · 4 files changed

+267/−0 lines, 4 filesdep +basedep +parsecsetup-changed

Dependencies added: base, parsec

Files

COPYING +165/−0
Language/CNF/Parse/ParseDIMACS.hs +83/−0
Setup.lhs +4/−0
parse-dimacs.cabal +15/−0

+ COPYING view

@@ -0,0 +1,165 @@+		   GNU LESSER GENERAL PUBLIC LICENSE+                       Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.+++  This version of the GNU Lesser General Public License incorporates+the terms and conditions of version 3 of the GNU General Public+License, supplemented by the additional permissions listed below.++  0. 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Combined Libraries.++  You may place library facilities that are a work based on the+Library side by side in a single library together with other library+facilities that are not Applications and are not covered by this+License, and convey such a combined library under terms of your+choice, if you do both of the following:++   a) Accompany the combined library with a copy of the same work based+   on the Library, uncombined with any other library facilities,+   conveyed under the terms of this License.++   b) Give prominent notice with the combined library that part of it+   is a work based on the Library, and explaining where to find the+   accompanying uncombined form of the same work.++  6. Revised Versions of the GNU Lesser General Public License.++  The Free Software Foundation may publish revised and/or new versions+of the GNU Lesser General Public License from time to time. 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If the Library as you+received it does not specify a version number of the GNU Lesser+General Public License, you may choose any version of the GNU Lesser+General Public License ever published by the Free Software Foundation.++  If the Library as you received it specifies that a proxy can decide+whether future versions of the GNU Lesser General Public License shall+apply, that proxy's public statement of acceptance of any version is+permanent authorization for you to choose that version for the+Library.

+ Language/CNF/Parse/ParseDIMACS.hs view

@@ -0,0 +1,83 @@+{-+    This program is free software: you can redistribute it and/or modify+    it under the terms of the GNU Lesser General Public License as published by+    the Free Software Foundation, either version 3 of the License, or+    (at your option) any later version.++    This program is distributed in the hope that it will be useful,+    but WITHOUT ANY WARRANTY; without even the implied warranty of+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the+    GNU Lesser General Public License for more details.++    You should have received a copy of the GNU Lesser General Public License+    along with this program.  If not, see <http://www.gnu.org/licenses/>.++    Copyright 2008 Denis Bueno+-}++-- | A simple Parsec module for parsing CNF files in DIMACS format.+module Language.CNF.Parse.ParseDIMACS+    (parseCNF, CNF(..)) where++import Text.ParserCombinators.Parsec++data CNF = CNF {numVars :: Int+               ,numClauses :: Int+               ,clauses :: [[Integer]]}++parseCNF :: String              -- ^ The filename.  Used to report errors.+         -> String              -- ^ The contents of the CNF file.+         -> CNF+parseCNF title input =+    case parse cnf title input of+      Left parseError -> error $ "Parse error: " ++ show parseError+      Right cs -> cs++cnf :: Parser CNF+cnf =+   do skipComments+      char 'p'+      spaces+      string "cnf"+      spaces+      numVars <- many1 digit+      spaces+      numClauses <- many1 digit+      manyTill space (try newline)+      actualClauses <- manyClause+      return $ CNF (read numVars) (read numClauses) (actualClauses)++skipComments :: Parser ()+skipComments =+    do try (do char 'c'+               _ <- manyTill anyChar (try (char '\n'))+               skipComments)+       <|> return ()++int :: Parser Integer+int = do parity <- option '+' $ choice $ map char "+-"+         first <- nonZeroDigit+         rest <- many digit+         return . read $+           case parity of+             '+' -> first : rest+             '-' -> '-' : first : rest+             _  -> error $ "unknown parity syntax: " ++ [parity]++nonZeroDigit :: Parser Char+nonZeroDigit = oneOf ['1'..'9']++intSpaces = do i <- int+               spaces+               return i++clause :: Parser [Integer]+clause =+    do spaces+       lits <- between (string "") (char '0') (many1 intSpaces)+       newline+       return $ lits++manyClause :: Parser [[Integer]]+manyClause = many1 clause+

+ Setup.lhs view

@@ -0,0 +1,4 @@+#! /usr/bin/env runhaskell++> import Distribution.Simple+> main = defaultMain

+ parse-dimacs.cabal view

@@ -0,0 +1,15 @@+Name:                parse-dimacs+Version:             1.0+Synopsis:            DIMACS CNF parser library+Description:         A DIMACS CNF parser library, implemented with Parsec.+Category:            Parsing+License:             LGPL+License-file:        COPYING+Author:              Denis Bueno+Maintainer:          <dbueno@gmail.com>+Stability:           provisional+Build-Depends:       base, parsec+Build-type:          Simple++Exposed-modules:     Language.CNF.Parse.ParseDIMACS+Ghc-options:         -W