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111 lines
4.6 KiB
Haskell
111 lines
4.6 KiB
Haskell
module Main where
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import Diff
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import Patch
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import Term
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import Syntax
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import Control.Comonad.Cofree
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import Control.Monad.Free hiding (unfoldM)
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import Data.Maybe
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import Data.Set
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import System.Environment
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import Foreign
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import Foreign.C
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import Foreign.C.Types
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import Foreign.C.String
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import Foreign.ForeignPtr.Unsafe
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data TSLanguage = TsLanguage deriving (Show, Eq)
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foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_c" ts_language_c :: IO (Ptr TSLanguage)
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data TSDocument = TsDocument deriving (Show, Eq)
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_make" ts_document_make :: IO (Ptr TSDocument)
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_language" ts_document_set_language :: Ptr TSDocument -> Ptr TSLanguage -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_input_string" ts_document_set_input_string :: Ptr TSDocument -> CString -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_parse" ts_document_parse :: Ptr TSDocument -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_free" ts_document_free :: Ptr TSDocument -> IO ()
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data TSLength = TsLength { bytes :: CSize, chars :: CSize }
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deriving (Show, Eq)
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data TSNode = TsNode { _data :: Ptr (), offset :: TSLength }
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deriving (Show, Eq)
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instance Storable TSNode where
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alignment n = 24
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sizeOf n = 24
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peek p = error "Haskell code should never read TSNode values directly."
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poke p n = error "Haskell code should never write TSNode values directly."
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foreign import ccall "app/bridge.h ts_document_root_node_p" ts_document_root_node_p :: Ptr TSDocument -> Ptr TSNode -> IO ()
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foreign import ccall "app/bridge.h ts_node_p_name" ts_node_p_name :: Ptr TSNode -> Ptr TSDocument -> IO CString
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foreign import ccall "app/bridge.h ts_node_p_named_child_count" ts_node_p_named_child_count :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_named_child" ts_node_p_named_child :: Ptr TSNode -> CSize -> Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_pos_chars" ts_node_p_pos_chars :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_size_chars" ts_node_p_size_chars :: Ptr TSNode -> IO CSize
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main :: IO ()
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main = do
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args <- getArgs
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let (a, b) = files args in do
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a' <- parseTreeSitterFile a
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b' <- parseTreeSitterFile b
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return (a', b')
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return ()
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parseTreeSitterFile :: FilePath -> IO (Term String Info)
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parseTreeSitterFile file = do
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document <- ts_document_make
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language <- ts_language_c
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ts_document_set_language document language
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contents <- readFile file
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withCString contents (\source -> do
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ts_document_set_input_string document source
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ts_document_parse document
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term <- documentToTerm document contents
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ts_document_free document
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return term)
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documentToTerm :: Ptr TSDocument -> String -> IO (Term String Info)
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documentToTerm document contents = alloca $ \root -> do
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ts_document_root_node_p document root
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toTerm root where
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toTerm :: Ptr TSNode -> IO (Term String Info)
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toTerm node = do
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name <- ts_node_p_name node document
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name <- peekCString name
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children <- withNamedChildren node toTerm
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range <- range node
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annotation <- return . Info range $ singleton name
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return $ annotation :< case children of
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[] -> Leaf $ substring range contents
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_ | member name fixedProductions -> Fixed children
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_ | otherwise -> Indexed children
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keyedProductions = fromList [ "object" ]
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fixedProductions = fromList [ "pair", "rel_op", "math_op", "bool_op", "bitwise_op", "type_op", "math_assignment", "assignment", "subscript_access", "member_access", "new_expression", "function_call", "function", "ternary" ]
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withNamedChildren :: Ptr TSNode -> (Ptr TSNode -> IO a) -> IO [a]
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withNamedChildren node transformNode = do
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count <- ts_node_p_named_child_count node
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if count == 0
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then return []
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else mapM (alloca . getChild) [0..pred count] where
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getChild n out = do
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ts_node_p_named_child node n out
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transformNode out
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range :: Ptr TSNode -> IO Range
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range node = do
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pos <- ts_node_p_pos_chars node
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size <- ts_node_p_size_chars node
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return Range { start = fromEnum $ toInteger pos, end = (fromEnum $ toInteger pos) + (fromEnum $ toInteger size) }
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files (a : as) = (a, file as) where
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file (a : as) = a
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files [] = error "expected two files to diff"
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substring :: Range -> String -> String
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substring range = take (end range) . drop (start range)
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