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Day 9

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This commit is contained in:
Chris Kaczor
2019-12-10 20:11:50 -05:00
parent 3888dc8e33
commit fbb941dd89
5 changed files with 107 additions and 39 deletions
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110
IntcodeComputer.cs
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@@ -1,5 +1,4 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace Advent
@@ -9,30 +8,60 @@ namespace Advent
private enum ParameterMode
{
Position,
Immediate
Immediate,
Relative
}
private readonly int[] _memory;
private readonly int _phase;
private readonly long[] _memory;
private readonly long _phase;
private bool _setPhase;
private int _instructionPointer;
private int _output;
private long _instructionPointer;
private long _output;
private long _relativeBase;
public bool Halted { get; private set; }
public IntcodeComputer(string memoryString, int phase)
public IntcodeComputer(string memoryString, long phase)
{
_memory = memoryString.Split(',').Select(int.Parse).ToArray();
_memory = new long[5000];
memoryString.Split(',').Select(long.Parse).ToArray().CopyTo(_memory, 0);
_phase = phase;
}
private static int GetValue(IReadOnlyList<int> codes, int parameter, ParameterMode mode)
private long GetValue(long parameter, ParameterMode mode)
{
return mode == ParameterMode.Immediate ? parameter : codes[parameter];
switch (mode)
{
case ParameterMode.Position:
return _memory[parameter];
case ParameterMode.Immediate:
return parameter;
case ParameterMode.Relative:
return _memory[_relativeBase + parameter];
default:
throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
}
}
public int Execute(int input)
private void SetValue(long value, long location, ParameterMode mode)
{
switch (mode)
{
case ParameterMode.Position:
_memory[location] = value;
break;
case ParameterMode.Relative:
_memory[_relativeBase + location] = value;
break;
default:
throw new ArgumentOutOfRangeException(nameof(mode), mode, null);
}
}
public long Execute(long input)
{
while (!Halted)
{
@@ -41,32 +70,42 @@ namespace Advent
switch (opCode)
{
case 1:
_memory[_memory[_instructionPointer + 3]] = GetValue(_memory, _memory[_instructionPointer + 1], mode1) + GetValue(_memory, _memory[_instructionPointer + 2], mode2);
{
var newValue = GetValue(_memory[_instructionPointer + 1], mode1) + GetValue(_memory[_instructionPointer + 2], mode2);
_instructionPointer += 4;
SetValue(newValue, _memory[_instructionPointer + 3], mode3);
break;
_instructionPointer += 4;
break;
}
case 2:
_memory[_memory[_instructionPointer + 3]] = GetValue(_memory, _memory[_instructionPointer + 1], mode1) * GetValue(_memory, _memory[_instructionPointer + 2], mode2);
{
var newValue = GetValue(_memory[_instructionPointer + 1], mode1) * GetValue(_memory[_instructionPointer + 2], mode2);
_instructionPointer += 4;
SetValue(newValue, _memory[_instructionPointer + 3], mode3);
break;
_instructionPointer += 4;
break;
}
case 3:
var inputValue = _setPhase ? input : _phase;
_setPhase = true;
_memory[_memory[_instructionPointer + 1]] = inputValue;
var writeValue = _memory[_instructionPointer + 1];
SetValue(inputValue, _memory[_instructionPointer + 3], mode3);
_instructionPointer += 2;
break;
case 4:
_output = GetValue(_memory, _memory[_instructionPointer + 1], ParameterMode.Position);
_output = GetValue(_memory[_instructionPointer + 1], mode1);
_instructionPointer += 2;
@@ -74,10 +113,10 @@ namespace Advent
case 5:
{
var value = GetValue(_memory, _memory[_instructionPointer + 1], mode1);
var value = GetValue(_memory[_instructionPointer + 1], mode1);
if (value != 0)
_instructionPointer = GetValue(_memory, _memory[_instructionPointer + 2], mode2);
_instructionPointer = GetValue(_memory[_instructionPointer + 2], mode2);
else
_instructionPointer += 3;
}
@@ -86,10 +125,10 @@ namespace Advent
case 6:
{
var value = GetValue(_memory, _memory[_instructionPointer + 1], mode1);
var value = GetValue(_memory[_instructionPointer + 1], mode1);
if (value == 0)
_instructionPointer = GetValue(_memory, _memory[_instructionPointer + 2], mode2);
_instructionPointer = GetValue(_memory[_instructionPointer + 2], mode2);
else
_instructionPointer += 3;
}
@@ -98,13 +137,13 @@ namespace Advent
case 7:
{
var value1 = GetValue(_memory, _memory[_instructionPointer + 1], mode1);
var value2 = GetValue(_memory, _memory[_instructionPointer + 2], mode2);
var value1 = GetValue(_memory[_instructionPointer + 1], mode1);
var value2 = GetValue(_memory[_instructionPointer + 2], mode2);
if (value1 < value2)
_memory[_memory[_instructionPointer + 3]] = 1;
SetValue(1, _memory[_instructionPointer + 3], mode3);
else
_memory[_memory[_instructionPointer + 3]] = 0;
SetValue(0, _memory[_instructionPointer + 3], mode3);
_instructionPointer += 4;
}
@@ -113,19 +152,26 @@ namespace Advent
case 8:
{
var value1 = GetValue(_memory, _memory[_instructionPointer + 1], mode1);
var value2 = GetValue(_memory, _memory[_instructionPointer + 2], mode2);
var value1 = GetValue(_memory[_instructionPointer + 1], mode1);
var value2 = GetValue(_memory[_instructionPointer + 2], mode2);
if (value1 == value2)
_memory[_memory[_instructionPointer + 3]] = 1;
SetValue(1, _memory[_instructionPointer + 3], mode3);
else
_memory[_memory[_instructionPointer + 3]] = 0;
SetValue(0, _memory[_instructionPointer + 3], mode3);
_instructionPointer += 4;
}
break;
case 9:
_relativeBase += GetValue(_memory[_instructionPointer + 1], mode1);
_instructionPointer += 2;
break;
case 99:
Halted = true;
@@ -136,7 +182,7 @@ namespace Advent
return _output;
}
private static (ParameterMode mode1, ParameterMode mode2, ParameterMode mode3, int opCode) ParseOpCode(int fullOpCode)
private static (ParameterMode mode1, ParameterMode mode2, ParameterMode mode3, int opCode) ParseOpCode(long fullOpCode)
{
var codeString = fullOpCode.ToString("00000").ToCharArray();