--- /dev/null
+{-# LANGUAGE NegativeLiterals #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE BangPatterns #-}
+
+import Debug.Trace
+
+-- import Prelude hiding ((++))
+import Data.Text (Text)
+import qualified Data.Text as T
+import qualified Data.Text.IO as TIO
+
+import Data.Void (Void)
+import Text.Megaparsec hiding (State)
+import Text.Megaparsec.Char
+import qualified Text.Megaparsec.Char.Lexer as L
+import qualified Control.Applicative as CA
+
+import qualified Data.Map.Strict as M
+import Data.Map.Strict ((!))
+import qualified Data.Set as S
+import Data.Bits ((.&.), (.|.))
+
+import Control.Monad (when)
+import Control.Monad.State.Strict
+import Control.Monad.Reader
+import Control.Monad.Writer
+
+type Memory = M.Map Integer Integer
+
+data Location = Literal Integer | Register Integer deriving (Show, Eq)
+data Instruction =
+ Addr Integer Integer Integer
+ | Addi Integer Integer Integer
+ | Mulr Integer Integer Integer
+ | Muli Integer Integer Integer
+ | Banr Integer Integer Integer
+ | Bani Integer Integer Integer
+ | Borr Integer Integer Integer
+ | Bori Integer Integer Integer
+ | Setr Integer Integer Integer
+ | Seti Integer Integer Integer
+ | Gtir Integer Integer Integer
+ | Gtri Integer Integer Integer
+ | Gtrr Integer Integer Integer
+ | Eqir Integer Integer Integer
+ | Eqri Integer Integer Integer
+ | Eqrr Integer Integer Integer
+ deriving (Eq, Show, Ord)
+
+
+data Machine = Machine { _registers :: M.Map Integer Integer
+ , _pc :: Int
+ , _history :: S.Set Integer
+ , _previous :: Integer
+ -- , _pcReg :: Integer
+ }
+ deriving (Show, Eq)
+
+type ProgrammedMachine = WriterT [Integer] (ReaderT (Integer, [Instruction]) (State Machine)) ()
+
+emptyMachine = Machine { _registers = M.fromList (zip [0..5] (repeat 0))
+ , _pc = 0
+ , _history = S.empty
+ , _previous = 0
+ }
+
+main :: IO ()
+main = do
+ text <- TIO.readFile "data/advent21.txt"
+ let (ip, instrs) = successfulParse text
+ -- print (ip, instrs)
+ -- print $ zip [0..] instrs
+ print $ part1 ip instrs
+ print $ part2 ip instrs
+
+part1 ip instructions =
+ runState (
+ runReaderT (
+ runWriterT executeInstructions1
+ )
+ (ip, instructions)
+ )
+ emptyMachine
+
+part2 ip instructions =
+ runState (
+ runReaderT (
+ runWriterT executeInstructions2
+ )
+ (ip, instructions)
+ )
+ emptyMachine
+
+
+-- part2 ip instructions = head (dropWhile terminates [11592302..]) - 1
+-- part2 ip instructions = terminates 11592301
+-- where emptyRegisters = _registers emptyMachine
+-- m2 reg0 = emptyMachine {_registers = M.insert 0 reg0 emptyRegisters}
+-- terminates reg0 = null $ runResult (m2 reg0) ip instructions
+
+-- runResult machine ip instructions = r1Repeat
+-- where
+-- r1Repeat = snd $ fst $ result
+-- result =
+-- runState (
+-- runReaderT (
+-- runWriterT executeInstructions2
+-- )
+-- (ip, instructions)
+-- )
+-- machine
+
+
+executeInstructions1 =
+ do (_, instrs) <- ask
+ m <- get
+ if (_pc m == 28) then do
+ tell [(_registers m)!1]
+ else do
+ when (_pc m >= 0 && _pc m < length instrs)
+ $
+ do executeInstruction
+ executeInstructions1
+
+executeInstructions2 =
+ do (_, instrs) <- ask
+ m0 <- get
+ let r1 = (trace ("R1 = " ++ (show $ (_registers m0)!1) ++ " :: " ++ (show $ S.size (_history m0)))) $ (_registers m0)!1
+ if (_pc m0 == 28 && (S.member r1 (_history m0))) then do
+ -- abort as found a loop
+ tell $ [_previous m0]
+ else do
+ when (_pc m0 == 28)
+ $
+ do
+ let m0' = m0 { _history = S.insert ((_registers m0)!1) (_history m0)
+ , _previous = (_registers m0)!1 }
+ -- let x = trace ("PC = 28, register 1 = " ++ (show ((_registers m0)!1))) $! True
+ put m0'
+ m <- get
+ when (_pc m >= 0 && _pc m < length instrs)
+ $
+ do executeInstruction
+ executeInstructions2
+
+
+executeInstruction :: ProgrammedMachine
+executeInstruction =
+ do (pcIs, instrs) <- ask
+ m <- get
+ let instr = instrs!!(_pc m)
+ let memory0 = _registers m
+ let memory1 = M.insert pcIs (fromIntegral (_pc m)) memory0
+ let memory2 = perform instr memory1
+ let pc' = fromIntegral ((memory2!pcIs) + 1)
+ -- let aaa = trace ("pc: " ++ show (_pc m) ++ " m0: " ++ show memory0 ++ " m1: " ++ show memory1 ++ "m2: " ++ show memory2 ++ "pc': " ++ show pc') $! True
+ let m' = m {_registers = memory2, _pc = pc'}
+ put m'
+
+
+perform :: Instruction -> Memory -> Memory
+-- perform instr memory | ((memory!5 == 7) || ((memory!5 == 3) && (memory!1 == 1))) && (trace ("Perform " ++ show instr ++ " " ++ show memory) False) = undefined
+-- perform instr memory | trace ("Perform " ++ show instr ++ " " ++ show memory) False = undefined
+perform (Addr a b c) !memory = M.insert c (memory!a + memory!b) memory
+perform (Addi a b c) !memory = M.insert c (memory!a + b) memory
+perform (Mulr a b c) !memory = M.insert c (memory!a * memory!b) memory
+perform (Muli a b c) !memory = M.insert c (memory!a * b) memory
+perform (Banr a b c) !memory = M.insert c (memory!a .&. memory!b) memory
+perform (Bani a b c) !memory = M.insert c (memory!a .&. b) memory
+perform (Borr a b c) !memory = M.insert c (memory!a .|. memory!b) memory
+perform (Bori a b c) !memory = M.insert c (memory!a .|. b) memory
+perform (Setr a b c) !memory = M.insert c (memory!a) memory
+perform (Seti a b c) !memory = M.insert c a memory
+perform (Gtir a b c) !memory = M.insert c (if a > (memory!b) then 1 else 0) memory
+perform (Gtri a b c) !memory = M.insert c (if (memory!a) > b then 1 else 0) memory
+perform (Gtrr a b c) !memory = M.insert c (if (memory!a) > (memory!b) then 1 else 0) memory
+perform (Eqir a b c) !memory = M.insert c (if a == memory!b then 1 else 0) memory
+perform (Eqri a b c) !memory = M.insert c (if (memory!a) == b then 1 else 0) memory
+perform (Eqrr a b c) !memory = M.insert c (if (memory!a) == (memory!b) then 1 else 0) memory
+
+
+-- evaluate :: Machine -> Location -> Integer
+-- evaluate _ (Literal i) = i
+-- evaluate m (Register r) = M.findWithDefault 0 r (registers m)
+
+
+
+type Parser = Parsec Void Text
+
+sc :: Parser ()
+sc = L.space (skipSome spaceChar) CA.empty CA.empty
+
+lexeme = L.lexeme sc
+integer = lexeme L.decimal
+symb = L.symbol sc
+
+
+instructionsP = (,) <$> headerP <*> many instructionP
+instructionP = choice [ addrP, addiP, mulrP, muliP, banrP, baniP,
+ borrP, boriP, setrP, setiP, gtirP, gtriP, gtrrP,
+ eqirP, eqriP, eqrrP ]
+
+headerP = symb "#ip" *> integer
+
+addrP = Addr <$> (try (symb "addr") *> integer) <*> integer <*> integer
+addiP = Addi <$> (try (symb "addi") *> integer) <*> integer <*> integer
+mulrP = Mulr <$> (try (symb "mulr") *> integer) <*> integer <*> integer
+muliP = Muli <$> (try (symb "muli") *> integer) <*> integer <*> integer
+banrP = Banr <$> (try (symb "banr") *> integer) <*> integer <*> integer
+baniP = Bani <$> (try (symb "bani") *> integer) <*> integer <*> integer
+borrP = Borr <$> (try (symb "borr") *> integer) <*> integer <*> integer
+boriP = Bori <$> (try (symb "bori") *> integer) <*> integer <*> integer
+setrP = Setr <$> (try (symb "setr") *> integer) <*> integer <*> integer
+setiP = Seti <$> (try (symb "seti") *> integer) <*> integer <*> integer
+gtirP = Gtir <$> (try (symb "gtir") *> integer) <*> integer <*> integer
+gtriP = Gtri <$> (try (symb "gtri") *> integer) <*> integer <*> integer
+gtrrP = Gtrr <$> (try (symb "gtrr") *> integer) <*> integer <*> integer
+eqirP = Eqir <$> (try (symb "eqir") *> integer) <*> integer <*> integer
+eqriP = Eqri <$> (try (symb "eqri") *> integer) <*> integer <*> integer
+eqrrP = Eqrr <$> (try (symb "eqrr") *> integer) <*> integer <*> integer
+
+successfulParse :: Text -> (Integer, [Instruction])
+successfulParse input =
+ case parse instructionsP "input" input of
+ Left _error -> (0, []) -- TIO.putStr $ T.pack $ parseErrorPretty err
+ Right instructions -> instructions
\ No newline at end of file
projects / advent-of-code-18.git / blobdiff