guess I'm done with re-org

src/RTLILParser/AST.hs

@@ -0,0 +1,24 @@
+module RTLILParser.AST(
+    PublicId(..),
+    AutogenId(..),
+    AutoIdxStmt(..),
+    Id(..),
+    Value(..)
+    ) where
+import Text.Read (Lexeme(Ident))
+
+data PublicId       = PublicId      String  deriving (Show)
+data AutogenId      = AutogenId     String  deriving (Show)
+data Id             = Public    PublicId
+                    | Autogen   AutogenId
+                    deriving (Show)
+data AutoIdxStmt    = AutoIdxStmt   Int     deriving (Show)
+data Value = Value
+    { width :: Int
+    , value :: Int
+    }
+    deriving (Show)
+data Constant = ConstantValue   Value
+              | ConstantInteger Int
+              | ConstantString  String
+              deriving (Show)

src/RTLILParser/Parser.hs

@@ -0,0 +1,85 @@
+-- this parser largely references:
+-- https://github.com/YosysHQ/yosys/blob/111b747d2797238eadf541879848492a9d34909a/docs/source/yosys_internals/formats/rtlil_text.rst
+module RTLILParser.Parser(a, val) where
+
+
+import Control.Monad (void)
+import Text.Parsec
+import Text.Parsec.String (Parser)
+import RTLILParser.AST(
+    PublicId(..), 
+    Id(..),
+    AutogenId(..),
+    AutoIdxStmt(..),
+    Value(..)
+    )
+import Util(binaryStringToInt) 
+import RTLILParser.Primitives(pEscapedChar)
+
+-- https://github.com/YosysHQ/yosys/blob/111b747d2797238eadf541879848492a9d34909a/frontends/rtlil/rtlil_lexer.l#L88C1-L88C17
+nonws :: Parser Char
+nonws = noneOf " \t\r\n"
+
+pWs :: Parser String
+pWs = many1 (oneOf " \t")
+
+pEol :: Parser String
+pEol = many1 (oneOf "\r\n")
+
+pPublicId   :: Parser PublicId
+pPublicId   = PublicId <$> (char '\\' *> many1 nonws)
+
+pAutogenId  :: Parser AutogenId
+pAutogenId  = AutogenId <$> (char '$' *> many1 nonws)
+
+pId :: Parser Id
+pId = Public  <$> pPublicId
+  <|> Autogen <$> pAutogenId
+
+decimalDigit :: Parser Char
+decimalDigit = oneOf "0123456789"
+
+-- update in the future to support 4 state logic
+-- by converting x and z to 0 and warning about it.
+pBinaryDigit :: Parser Char
+pBinaryDigit = oneOf "01"
+
+pString :: Parser String
+pString = 
+    between delimiter delimiter parseString
+    where
+        delimiter = char '"'
+        parseString = many (pEscapedChar <|> noneOf "\\\"")
+
+
+pValue :: Parser Value
+pValue = Value  <$> pInteger 
+                <*> (binaryStringToInt <$> many1 pBinaryDigit)
+
+pInteger :: Parser Int
+pInteger = do
+    sign <- optionMaybe (char '-')
+    digits <- many1 digit
+    let value = read digits
+    return $ case sign of
+        Just _  -> -value
+        Nothing ->  value
+
+
+pAutoIdxStmt :: Parser AutoIdxStmt
+pAutoIdxStmt = AutoIdxStmt <$> (string "autoidx" *> pWs *> pInteger <* pEol)
+
+pModuleStmt :: Parser Id
+pModuleStmt = string "module" *> pWs *> pId <* pEol
+
+pModuleEndStmt :: Parser ()
+pModuleEndStmt = void (string "end")
+
+-- pModuleStmt :: Parser ()
+-- pModuleStmt = 
+
+-- val = parse pInteger "pInteger" "721"
+val = parse pModuleStmt "pModuleStmt" "module \\top\n"
+
+a :: Int
+a = 3

src/RTLILParser/Primitives.hs

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+module RTLILParser.Primitives(
+    pOctal,
+    pEscapedChar
+) where
+
+import Control.Monad (void)
+import Text.Parsec
+import Text.Parsec.String (Parser)
+import Data.Char (digitToInt)
+import Util(binaryStringToInt, octalStringToInt)
+
+
+pOctal :: Parser Char
+pOctal = do
+    digits <- count 1 digit -- At least 1 digit
+    moreDigits <- option "" (count 2 digit) -- Up to 3 digits total
+    case octalStringToInt (digits ++ moreDigits) of
+        Just value -> return $ toEnum value -- Convert integer to a Char
+        Nothing    -> fail "Invalid octal escape sequence"
+
+pEscapedChar :: Parser Char
+pEscapedChar = do
+    char '\\' -- Match the backslash
+    choice
+        [ char 'n' >> return '\n'
+        , char 't' >> return '\t'
+        , try pOctal             
+        , anyChar                
+        ]