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comments and refactoring

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kamoshi 2019-12-09 22:09:39 +01:00 committed by GitHub
parent 4b2819df99
commit 0829fe9fd3
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1 changed files with 17 additions and 11 deletions
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28
2019/Scala/intcode/Machine.scala
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@ -1,12 +1,12 @@
package intcode
import intcode.opcode.{Action, Input, Jump, OpCode9, OpCode99, Output}
import intcode.opcode.{Action, Jump, OpCode3, OpCode4, OpCode9, OpCode99}
import scala.collection.mutable.ListBuffer
/**
* Virtual IntCode machine
* @param input Memory used to initialize the machine with.
* @param input Program memory used to initialize the machine
*/
class Machine(input: Array[Long])
{
@ -73,18 +73,14 @@ class Machine(input: Array[Long])
val tuple = OpCode99.parseInt(software(pointer).toInt)
tuple match
{
// 99 -> Reached end of the program -> halt
case (_, _, _, OpCode99) =>
state = Finished
println("Machine finished")
this
case (_, _, m1, outputInstr: Output) =>
outputStream.addOne(outputInstr.output(software, relative, software(pointer+1), m1))
pointer += outputInstr.length
state = Ready
run()
case (_, _, m1, inputInstr: Input) =>
// 3 -> Trying to retrieve an input value from the buffer; in case of failure -> halt
case (_, _, m1, OpCode3) =>
//buffer is empty
if (inputStream.isEmpty)
{
@ -95,12 +91,20 @@ class Machine(input: Array[Long])
// buffer contains inputs
else
{
inputInstr.input(software, relative, software(pointer+1), m1, inputStream.remove(0))
pointer += inputInstr.length
OpCode3.input(software, relative, software(pointer+1), m1, inputStream.remove(0))
pointer += OpCode3.length
state = Ready
run()
}
// 4 -> Outputting value to the OutputStream buffer
case (_, _, m1, OpCode4) =>
outputStream.addOne(OpCode4.output(software, relative, software(pointer+1), m1))
pointer += OpCode4.length
state = Ready
run()
// 5, 6 -> Check condition; if true modify instruction pointer
case (m3, m2, m1, instruction: Jump) =>
val (bool, jmpPtr) = instruction.checkConditionAndJump(software, relative, software(pointer+1), software(pointer+2), software(pointer+3), m1, m2, m3)
if (bool) pointer = jmpPtr
@ -108,12 +112,14 @@ class Machine(input: Array[Long])
state = Ready
run()
// 1, 2, 7, 8 -> Perform an action
case (m3, m2, m1, instruction: Action) =>
instruction.exec(software, relative, software(pointer+1), software(pointer+2), software(pointer+3), m1, m2, m3)
pointer += instruction.length
state = Ready
run()
// 9 -> Modify relative pointer
case (_, _, m1, OpCode9) =>
relative += OpCode9.exec(software, relative, software(pointer+1), m1)
pointer += OpCode9.length