1 files changed, 41 insertions, 0 deletions
diff --git a/mustache/src/Text/Mustache/Internal.hs b/mustache/src/Text/Mustache/Internal.hs
new file mode 100644
index 0000000..c1bf8b7
--- /dev/null
+++ b/mustache/src/Text/Mustache/Internal.hs
@@ -0,0 +1,41 @@
+{-|
+Module      : $Header$
+Description : Types and conversions
+Copyright   : (c) Justus Adam, 2015
+License     : BSD3
+Maintainer  : dev@justus.science
+Stability   : experimental
+Portability : POSIX
+
+escapeXML and xmlEntities curtesy to the tagsoup library.
+-}
+module Text.Mustache.Internal (uncons, escapeXMLText) where
+
+
+import           Data.Char   (ord)
+import qualified Data.IntMap as IntMap
+import qualified Data.Text   as T
+
+
+uncons :: [α] -> Maybe (α, [α])
+uncons []     = Nothing
+uncons (x:xs) = return (x, xs)
+
+
+escapeXMLText :: T.Text -> T.Text
+escapeXMLText = T.pack . escapeXML . T.unpack
+
+
+escapeXML :: String -> String
+escapeXML = concatMap $ \x -> IntMap.findWithDefault [x] (ord x) mp
+    where mp = IntMap.fromList [(ord b, "&"++a++";") | (a,[b]) <- xmlEntities]
+
+
+xmlEntities :: [(String, String)]
+xmlEntities =
+  [ ("quot", "\"")
+  , ("#39", "'")
+  , ("amp" , "&")
+  , ("lt"  , "<")
+  , ("gt"  , ">")
+  ]