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www.mikescher.com/www/statics/aoc/2019/09_solution-2.ts

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2019-12-09 14:39:03 +01:00
namespace AdventOfCode2019_09_2
{
const DAY = 9;
const PROBLEM = 2;
export async function run()
{
let input = await AdventOfCode.getInput(DAY);
if (input == null) return;
const code = input.split(",").map(p => parseInt(p.trim()));
let runner = new Interpreter(code, [2]);
runner.run();
AdventOfCode.output(DAY, PROBLEM, runner.output.reverse()[0].toString());
}
class Interpreter
{
program: InfMem;
input: number[];
instructionpointer: number;
inputpointer: number;
output: number[];
relative_base: number;
constructor(prog: number[], input: number[])
{
this.program = new InfMem(prog);
this.input = input;
this.instructionpointer = 0;
this.inputpointer = 0;
this.output = [];
this.relative_base = 0;
}
run()
{
while(true)
{
const cmd = new Op(this.program.r(this.instructionpointer));
let ipinc = true;
if (cmd.opcode == OpCode.ADD)
{
const p0 = cmd.getParameter(this, 0);
const p1 = cmd.getParameter(this, 1);
const pv = p0 + p1;
cmd.setParameter(this, 2, pv);
}
else if (cmd.opcode == OpCode.MUL)
{
const p0 = cmd.getParameter(this, 0);
const p1 = cmd.getParameter(this, 1);
const pv = p0 * p1;
cmd.setParameter(this, 2, pv);
}
else if (cmd.opcode == OpCode.HALT)
{
return;
}
else if (cmd.opcode == OpCode.IN)
{
const pv = this.input[this.inputpointer];
cmd.setParameter(this, 0, pv);
this.inputpointer++;
}
else if (cmd.opcode == OpCode.OUT)
{
const p0 = cmd.getParameter(this, 0);
this.output.push(p0);
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AdventOfCode.outputConsole("# " + p0);
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}
else if (cmd.opcode == OpCode.TJMP)
{
const p0 = cmd.getParameter(this, 0);
if (p0 != 0) { this.instructionpointer = cmd.getParameter(this, 1); ipinc=false; }
}
else if (cmd.opcode == OpCode.FJMP)
{
const p0 = cmd.getParameter(this, 0);
if (p0 == 0) { this.instructionpointer = cmd.getParameter(this, 1); ipinc=false; }
}
else if (cmd.opcode == OpCode.LT)
{
const p0 = cmd.getParameter(this, 0);
const p1 = cmd.getParameter(this, 1);
const pv = p0 < p1 ? 1 : 0;
cmd.setParameter(this, 2, pv);
}
else if (cmd.opcode == OpCode.EQ)
{
const p0 = cmd.getParameter(this, 0);
const p1 = cmd.getParameter(this, 1);
const pv = p0 == p1 ? 1 : 0;
cmd.setParameter(this, 2, pv);
}
else if (cmd.opcode == OpCode.ARB)
{
const p0 = cmd.getParameter(this, 0);
this.relative_base = this.relative_base+p0;
}
else throw "Unknown Op: " + cmd.opcode + " @ " + this.instructionpointer;
if (ipinc) this.instructionpointer += 1 + cmd.parametercount;
}
}
}
enum OpCode
{
ADD = 1,
MUL = 2,
IN = 3,
OUT = 4,
TJMP = 5,
FJMP = 6,
LT = 7,
EQ = 8,
ARB = 9,
HALT = 99,
}
enum ParamMode
{
POSITION_MODE = 0,
IMMEDIATE_MODE = 1,
RELATIVE_MODE = 2,
}
class Op
{
opcode: OpCode;
modes: ParamMode[];
name: string;
parametercount: number;
constructor(v: number)
{
this.opcode = v%100;
v = Math.floor(v/100);
this.modes = [];
for(let i=0; i<4; i++)
{
this.modes.push(v%10);
v = Math.floor(v/10);
}
if (this.opcode == OpCode.ADD) { this.name="ADD"; this.parametercount=3; }
else if (this.opcode == OpCode.MUL) { this.name="MUL"; this.parametercount=3; }
else if (this.opcode == OpCode.HALT) { this.name="HALT"; this.parametercount=0; }
else if (this.opcode == OpCode.IN) { this.name="IN"; this.parametercount=1; }
else if (this.opcode == OpCode.OUT) { this.name="OUT"; this.parametercount=1; }
else if (this.opcode == OpCode.TJMP) { this.name="TJMP"; this.parametercount=2; }
else if (this.opcode == OpCode.FJMP) { this.name="FJMP"; this.parametercount=2; }
else if (this.opcode == OpCode.LT) { this.name="LT"; this.parametercount=3; }
else if (this.opcode == OpCode.EQ) { this.name="EQ"; this.parametercount=3; }
else if (this.opcode == OpCode.ARB) { this.name="ARB"; this.parametercount=1; }
else throw "Unknown opcode: "+this.opcode;
}
getParameter(proc: Interpreter, index: number): number
{
const prog = proc.program;
const ip = proc.instructionpointer;
let p = prog.r(ip+1+index);
if (this.modes[index] == ParamMode.POSITION_MODE) p = prog.r(p);
else if (this.modes[index] == ParamMode.IMMEDIATE_MODE) p = p;
else if (this.modes[index] == ParamMode.RELATIVE_MODE) p = prog.r(proc.relative_base+p);
else throw "Unknown ParamMode: "+this.modes[index];
return p;
}
setParameter(proc: Interpreter, index: number, value: number): void
{
const prog = proc.program;
const ip = proc.instructionpointer;
let p = prog.r(ip+1+index);
if (this.modes[index] == ParamMode.POSITION_MODE) prog.w(p, value);
else if (this.modes[index] == ParamMode.IMMEDIATE_MODE) throw "Immediate mode not allowed in write";
else if (this.modes[index] == ParamMode.RELATIVE_MODE) prog.w(proc.relative_base+p, value);
else throw "Unknown ParamMode: "+this.modes[index];
}
}
class InfMem
{
private data: { [_:number]:number } = {};
constructor(v: number[])
{
for(let i=0; i<v.length;i++) this.data[i]=v[i];
}
r(pos: number): number
{
if (!(pos in this.data)) this.data[pos] = 0;
return this.data[pos];
}
w(pos: number, val: number): number
{
return this.data[pos] = val;
}
}
}