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2019/day5/Main.scala

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+package day5
+
+import day5.opcode.{Action, Jump, OpCode1, OpCode2, OpCode99}
+
+import scala.io.Source
+
+object Main {
+
+  val insertTape = Source.fromFile(getClass.getResource("/input5.txt").getFile).mkString.split("[^\\d-]+").map(x => x.toInt)
+
+  def opCodeRunner(tape: Array[Int], nextPtr: Int): Boolean =
+  {
+    //println("=======\nParsing at "+nextPtr+": ["+tape(nextPtr)+", "+tape(nextPtr+1)+", "+tape(nextPtr+2)+", "+tape(nextPtr+3)+ "]");
+    val tuple = OpCode1.parseInt(tape(nextPtr));
+    //println("Executing: " + tuple)
+    tuple match
+    {
+      case (_, _, _, OpCode99) => true // finish
+      case (m3, m2, m1, instruction: Jump) =>
+        {
+          val (bool, jmpPtr) = instruction.checkConditionAndJump(tape, tape(nextPtr+1), tape(nextPtr+2), tape(nextPtr+3), m1, m2, m3)
+          //println("Jumping?: " + bool + " " + jmpPtr)
+          if (bool) opCodeRunner(tape, jmpPtr)
+          else opCodeRunner(tape, nextPtr + instruction.length)
+        }
+      case (m3, m2, m1, instruction: Action) =>
+        {
+          instruction.exec(tape, tape(nextPtr+1), tape(nextPtr+2), tape(nextPtr+3), m1, m2, m3)
+          opCodeRunner(tape, nextPtr + instruction.length)
+        }
+    }
+  }
+
+  def main(args: Array[String]): Unit = {
+    println("Starting program...")
+
+    opCodeRunner(insertTape, 0)
+
+    println("Program finished...")
+  }
+}

2019/day5/opcode/Action.scala

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+package day5.opcode
+
+trait Action extends OpCode
+{
+  /** Executes instruction for given parameters and modes */
+  def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int)
+}

2019/day5/opcode/Jump.scala

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+package day5.opcode
+
+trait Jump extends OpCode
+{
+  /** Executes instruction for given parameters and modes */
+  def checkConditionAndJump(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): (Boolean, Int)
+}
+

2019/day5/opcode/OpCode.scala

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+package day5.opcode
+
+abstract trait OpCode
+{
+  /** length of an instruction */
+  val length: Int
+
+  /** Parse int to full OpCode */
+  def parseInt(code: Int): (Int, Int, Int, OpCode) = // Dunno how to make this static lmao
+  {
+    val opCodeInt: Int = code % 100 // Instruction Code
+    val modeStr = code.toString.substring(0, {if (code.toString.length > 1) code.toString.length - 2 else 0})
+    val modes = ("000".substring(modeStr.length) + modeStr).toArray.map(_.asDigit) // List of modes
+    opCodeInt match {
+      case 1 => (modes(0), modes(1), modes(2), OpCode1)
+      case 2 => (modes(0), modes(1), modes(2), OpCode2)
+      case 3 => (modes(0), modes(1), modes(2), OpCode3)
+      case 4 => (modes(0), modes(1), modes(2), OpCode4)
+      case 5 => (modes(0), modes(1), modes(2), OpCode5)
+      case 6 => (modes(0), modes(1), modes(2), OpCode6)
+      case 7 => (modes(0), modes(1), modes(2), OpCode7)
+      case 8 => (modes(0), modes(1), modes(2), OpCode8)
+      case 99 => (0, 0, 0, OpCode99)
+      case c => throw new Exception("Wrong instruction code " + c)
+    }
+  }
+
+  /** Returns correct value, immediate or positional */
+  protected[this] def accessor(param: Int, mode: Int, tape: Array[Int]): Int =
+  {
+    mode match
+    {
+      case 0 => /* println("Reading "+tape(param)+" from array("+param+")");*/ tape(param);
+      case 1 => /*println("Reading "+param+" immediate");*/ param
+      case p => throw new Exception("HCF: wrong accessor parameter " + p)
+    }
+  }
+
+  /** Writes to the tape in a manner specified by the mode */
+  protected[this] def writer(param: Int, mode: Int, tape: Array[Int], value: Int): Unit =
+  {
+    mode match
+    {
+      case 0 => tape(param) = value//; println("Writing "+value+" to array("+param+")")
+      case 1 => throw new Exception("HCF: unimplemented writer parameter 1")
+      case p => throw new Exception("HCF: wrong writer parameter " + p)
+    }
+  }
+}

2019/day5/opcode/OpCode1.scala

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+package day5.opcode
+
+/** Sum */
+case object OpCode1 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 4
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    val result = accessor(param1, mode1, tape) + accessor(param2, mode2, tape)
+    writer(param3, 0, tape, result) // Write mode is 0 default for now
+  }
+}

2019/day5/opcode/OpCode2.scala

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+package day5.opcode
+
+/** Multiplication */
+case object OpCode2 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 4
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    val result = accessor(param1, mode1, tape) * accessor(param2, mode2, tape)
+    writer(param3, 0, tape, result) // Write mode is 0 default for now
+  }
+}

2019/day5/opcode/OpCode3.scala

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+package day5.opcode
+
+/** Input */
+case object OpCode3 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 2
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    println("<< input")
+    val userInput = scala.io.StdIn.readInt()
+    writer(param1, 0, tape, userInput)
+  }
+}

2019/day5/opcode/OpCode4.scala

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+package day5.opcode
+
+/** Output */
+case object OpCode4 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 2
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    mode1 match
+    {
+      case 0 => println(accessor(param1, 0, tape))
+      case 1 => println(param1)
+    }
+  }
+}

2019/day5/opcode/OpCode5.scala

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+package day5.opcode
+
+case object OpCode5 extends Jump
+{
+  /** length of an instruction */
+  override val length: Int = 3
+
+  /** Executes instruction for given parameters and modes */
+  override def checkConditionAndJump(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): (Boolean, Int) =
+  {
+    if (accessor(param1, mode1, tape) != 0) (true, accessor(param2, mode2, tape))
+    else (false, 0)
+  }
+}

2019/day5/opcode/OpCode6.scala

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+package day5.opcode
+
+case object OpCode6 extends Jump
+{
+  /** length of an instruction */
+  override val length: Int = 3
+
+  /** Executes instruction for given parameters and modes */
+  override def checkConditionAndJump(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): (Boolean, Int) =
+  {
+    if (accessor(param1, mode1, tape) == 0) (true, accessor(param2, mode2, tape))
+    else (false, 0)
+  }
+}

2019/day5/opcode/OpCode7.scala

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+package day5.opcode
+
+case object OpCode7 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 4
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    if (accessor(param1, mode1, tape) < accessor(param2, mode2, tape))
+      writer(param3, 0, tape, 1)
+    else
+      writer(param3, 0, tape, 0)
+  }
+}

2019/day5/opcode/OpCode8.scala

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+package day5.opcode
+
+case object OpCode8 extends Action
+{
+  /** length of an instruction */
+  override val length: Int = 4
+
+  /** Executes instruction for given parameters and modes */
+  override def exec(tape: Array[Int], param1: Int, param2: Int, param3: Int, mode1: Int, mode2: Int, mode3: Int): Unit =
+  {
+    if (accessor(param1, mode1, tape) == accessor(param2, mode2, tape))
+      writer(param3, 0, tape, 1)
+    else
+      writer(param3, 0, tape, 0)
+  }
+}

2019/day5/opcode/OpCode99.scala

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+package day5.opcode
+
+case object OpCode99 extends OpCode {
+  /** length of an instruction */
+  override val length: Int = 1
+}