Boundary.hs

--
-- Copyright (c) 2013-2023 Nicola Bonelli <nicola@larthia.com>
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 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 General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
--

module CGrep.Boundary (
     Boundary(..)
    , BoundaryType(..)
    , pattern Begin
    , pattern End) where

import qualified Data.ByteString.Char8 as C
import Data.Word ( Word8 )

data Boundary = Boundary {
    bBegin :: C.ByteString
 ,  bEnd :: C.ByteString
} deriving stock (Show, Eq)


newtype BoundaryType = BoundaryType { unpackBoundaryType :: Word8 }
    deriving newtype (Eq, Ord)

instance Show BoundaryType where
    show Begin = "begin"
    show End = "end"

pattern Begin :: BoundaryType
pattern Begin = BoundaryType 0
pattern End :: BoundaryType
pattern End = BoundaryType 1

{-# COMPLETE Begin, End #-}