Clean exported ByteString custom functions

src/Data/ByteString/Char8/Util.hs

@@ -2,15 +2,15 @@ module Data.ByteString.Char8.Util (
       decodeHex
     , fromInt
     , hexString
-    , parseBytes
     , previous
     , subBS
     , toInt
+    , toBytes
     , utf16BEToutf8
   ) where
 
 import Data.ByteString (ByteString, snoc)
-import qualified Data.ByteString as BS (foldl, pack, singleton)
+import qualified Data.ByteString as BS (empty, foldl, pack, singleton)
 import qualified Data.ByteString.Char8 as Char8 (drop, index, take, unpack)
 import Data.Text.Encoding (encodeUtf8, decodeUtf16BE)
 import Prelude hiding (length)
@@ -31,19 +31,15 @@ fromInt n
   | n < 0x100 = BS.singleton $ toEnum n
   | otherwise = fromInt (n `div` 0x100) `snoc` (toEnum (n `mod` 0x100))
 
+toBytes :: Int -> Int -> ByteString
+toBytes 0 _ = BS.empty
+toBytes size n = toBytes (size - 1) (n `div` 0x100) `snoc` (toEnum (n `mod` 0x100))
+
 toInt :: ByteString -> Int
 toInt = BS.foldl (\n w -> 0x100*n + fromEnum w) 0
 
-{-
-encodeHex :: ByteString -> ByteString
-encodeHex = 
--}
-
 decodeHex :: ByteString -> ByteString
-decodeHex = parseBytes . Char8.unpack
+decodeHex = BS.pack . fmap hexString . pairDigits . Char8.unpack
-
-parseBytes :: String -> ByteString
-parseBytes = BS.pack . fmap hexString . pairDigits
   where
     pairDigits "" = []
     pairDigits [c] = [[c]]

src/PDF/Object.hs

@@ -27,7 +27,6 @@ module PDF.Object (
     , magicNumber
     , name
     , number
-    , parseBytes
     , regular
     , stringObject
     , structure
@@ -36,14 +35,12 @@ module PDF.Object (
 import Control.Applicative ((<|>), many)
 import Data.Attoparsec.ByteString.Char8 (choice, count, option, sepBy)
 import Data.ByteString (ByteString)
-import qualified Data.ByteString as BS (concat, pack)
+import qualified Data.ByteString as BS (concat)
 import qualified Data.ByteString.Char8 as Char8 (cons, pack, singleton, unpack)
-import Data.ByteString.Char8.Util (hexString, parseBytes)
 import Data.Map (Map, (!), mapWithKey)
 import qualified Data.Map as Map (
     delete, empty, fromList, lookup, minViewWithKey, toList, union
   )
-import Data.Text.Encoding (decodeUtf16BE, encodeUtf8)
 import qualified PDF.EOL as EOL (charset, parser)
 import qualified PDF.Output as Output (concat, line, string)
 import PDF.Output (