Day seventeen part one

day-17-haskell/.gitignore

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+.stack-work/
+*~

day-17-haskell/Setup.hs

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+import Distribution.Simple
+main = defaultMain

day-17-haskell/app/Main.hs

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+module Main (main) where
+
+import System.Environment.Blank ( getArgs )
+import Lib (task1, task2)
+
+main :: IO ()
+main = do
+  args <- getArgs
+  case args of
+    ["1", file] -> do
+      input <- readFile file
+      result <- task1 input
+      print result
+    ["2", file] -> do
+      input <- readFile file
+      result <- task2 input
+      print result
+    _ -> error "Usage: <1|2> <input file>"

day-17-haskell/day17-haskell.cabal

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+cabal-version: 2.2
+
+-- This file has been generated from package.yaml by hpack version 0.37.0.
+--
+-- see: https://github.com/sol/hpack
+
+name:           day17-haskell
+version:        0.1.0.0
+homepage:       https://github.com/Siphalor/day17-haskell#readme
+bug-reports:    https://github.com/Siphalor/day17-haskell/issues
+author:         Siphalor
+maintainer:     info@siphalor.de
+copyright:      Siphalor
+license:        BSD-3-Clause
+build-type:     Simple
+
+source-repository head
+  type: git
+  location: https://github.com/Siphalor/day17-haskell
+
+library
+  exposed-modules:
+      Lib
+  hs-source-dirs:
+      src
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints
+  build-depends:
+      base >=4.7 && <5
+    , containers
+    , flow
+  default-language: Haskell2010
+
+executable day17-haskell-exe
+  main-is: Main.hs
+  hs-source-dirs:
+      app
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , day17-haskell
+  default-language: Haskell2010
+
+test-suite day17-haskell-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  hs-source-dirs:
+      test
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      base >=4.7 && <5
+    , day17-haskell
+  default-language: Haskell2010

day-17-haskell/package.yaml

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+name:                day17-haskell
+version:             0.1.0.0
+github:              "Siphalor/day17-haskell"
+license:             BSD-3-Clause
+author:              "Siphalor"
+maintainer:          "info@siphalor.de"
+copyright:           "Siphalor"
+spec-version:        0.36.0
+
+dependencies:
+- base >= 4.7 && < 5
+
+ghc-options:
+- -Wall
+- -Wcompat
+- -Widentities
+- -Wincomplete-record-updates
+- -Wincomplete-uni-patterns
+- -Wmissing-home-modules
+- -Wpartial-fields
+- -Wredundant-constraints
+
+library:
+  source-dirs: src
+  dependencies:
+  - flow
+  - containers
+
+executables:
+  day17-haskell-exe:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - day17-haskell
+
+tests:
+  day17-haskell-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - day17-haskell

day-17-haskell/src/Lib.hs

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+{-# LANGUAGE NamedFieldPuns #-}
+
+module Lib where
+
+import Control.Monad (join)
+import Data.Bits (xor)
+import Data.Char (isNumber)
+import qualified Data.Map.Strict as Map
+import Flow
+import Text.ParserCombinators.ReadP
+
+type IntType = Int
+
+type Registers = Map.Map Char IntType
+data DebuggerInfo = DebuggerInfo { dRegs :: Registers, dInstructions :: [IntType] }
+
+task1 :: String -> IO IntType
+task1 input =
+  let di = readInput input
+  in do
+    outs <- tick 0 (dRegs di) di
+    print outs
+    outs |> map show |> join |> read |> return
+
+tick :: IntType -> Registers -> DebuggerInfo -> IO [IntType]
+tick pos regs di@DebuggerInfo { dInstructions } = do
+  print regs
+  case drop pos dInstructions of 
+    [] -> return []
+    (0:operand:_) ->
+      let result = (regs Map.! 'A') `div` (2 ^ comboValue operand)
+      in tick (pos+2) (Map.insert 'A' result regs) di
+    (1:operand:_) ->
+      let result = (regs Map.! 'B') `xor` operand
+      in tick (pos+2) (Map.insert 'B' result regs) di
+    (2:operand:_) ->
+      let result = comboValue operand `mod` 8
+      in tick (pos+2) (Map.insert 'B' result regs) di
+    (3:operand:_) ->
+      if regs Map.! 'A' == 0
+      then tick (pos+2) regs di
+      else tick operand regs di
+    (4:_:_) ->
+      let result = (regs Map.! 'B') `xor` (regs Map.! 'C')
+      in tick (pos+2) (Map.insert 'B' result regs) di
+    (5:operand:_) -> do
+      rest <- tick (pos+2) regs di
+      return $ (comboValue operand `mod` 8) : rest
+    (6:operand:_) ->
+      let result = (regs Map.! 'A') `div` (2 ^ comboValue operand)
+      in tick (pos+2) (Map.insert 'B' result regs) di
+    (7:operand:_) ->
+      let result = (regs Map.! 'A') `div` (2 ^ comboValue operand)
+      in tick (pos+2) (Map.insert 'C' result regs) di
+    (opcode) -> error $ "Illegal opcode (" ++ (show opcode) ++ ") at " ++ (show pos)
+
+  where
+    comboValue :: IntType -> IntType
+    comboValue 0 = 0
+    comboValue 1 = 1
+    comboValue 2 = 2
+    comboValue 3 = 3
+    comboValue 4 = regs Map.! 'A'
+    comboValue 5 = regs Map.! 'B'
+    comboValue 6 = regs Map.! 'C'
+    comboValue other = error $ "Illegal combo operand (" ++ (show other) ++ ") at " ++ (show pos)
+
+task2 :: String -> IO IntType
+task2 _ = return 2
+
+readInput :: String -> DebuggerInfo
+readInput input = case readP_to_S parseDebuggerInfo input of
+  [] -> error "Failed to parse input"
+  ((res,_):_) -> res
+
+parseDebuggerInfo :: ReadP DebuggerInfo
+parseDebuggerInfo = do
+  registers <- sepBy1 parseRegister (char '\n')
+  _ <- munch isNewLine
+  _ <- string "Program: "
+  instrs <- sepBy1 parseInt (char ',') 
+  _ <- munch isNewLine
+  _ <- eof
+  return DebuggerInfo { dRegs = Map.fromList registers, dInstructions = instrs }
+
+parseRegister :: ReadP (Char, IntType)
+parseRegister = do
+  _ <- string "Register "
+  name <- get
+  _ <- string ": "
+  initial <- parseInt
+  return (name, initial)
+
+parseInt :: ReadP IntType
+parseInt = do
+  digits <- munch1 isNumber
+  return $ read digits
+
+isNewLine :: Char -> Bool
+isNewLine = (==) '\n'

day-17-haskell/stack.yaml

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+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# A 'specific' Stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# snapshot: lts-22.28
+# snapshot: nightly-2024-07-05
+# snapshot: ghc-9.6.6
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# snapshot: ./custom-snapshot.yaml
+# snapshot: https://example.com/snapshots/2024-01-01.yaml
+snapshot:
+  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/0.yaml
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the snapshot.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+# extra-deps: []
+
+# Override default flag values for project packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of Stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=3.1"
+#
+# Override the architecture used by Stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by Stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

day-17-haskell/stack.yaml.lock

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+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages: []
+snapshots:
+- completed:
+    sha256: 9444fadfa30b67a93080254d53872478c087592ad64443e47c546cdcd13149ae
+    size: 678857
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/0.yaml
+  original:
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/0.yaml

day-17-haskell/test/Spec.hs

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+main :: IO ()
+main = putStrLn "Test suite not yet implemented"