78 lines
2.1 KiB
JavaScript
78 lines
2.1 KiB
JavaScript
var instructions = [];
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var registers = {a: 7, b: 0, c: 0, d: 0};
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var instructionSet = {};
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instructionSet.cpy = (a, b)=>{
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if(b in registers){
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if(Number.isInteger(parseInt(a))){
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registers[b] = parseInt(a);
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}
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else{
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registers[b] = registers[a];
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}
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}
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}
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instructionSet.inc = (a)=>{
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if(a in registers){
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registers[a]++;
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}
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}
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instructionSet.dec = (a)=>{
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if(a in registers){
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registers[a]--;
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}
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}
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instructionSet.jnz = (a, b)=>{
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b = (Number.isInteger(parseInt(b))) ? parseInt(b) : registers[b];
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if((registers[a] != 0) || ((parseInt(a) != 0) && (!isNaN(parseInt(a))))){
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pc = pc + (parseInt(b) - 1);
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}
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}
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instructionSet.tgl = (a)=>{
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a = (Number.isInteger(parseInt(a))) ? parseInt(a) : registers[a];
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if((pc+a) < instructions.length){
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if(instructions[pc+a][1].length == 2){
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instructions[pc+a][0] = (instructions[pc+a][0] == "jnz") ? "cpy" : "jnz";
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}
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else{
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instructions[pc+a][0] = (instructions[pc+a][0] == "inc") ? "dec" : "inc";
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}
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}
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}
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var input = require("fs").readFileSync("input.txt").toString().replace(/\r/g, "");
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var instructions = input.split("\n").filter((a)=>(a)).map((instruction)=>{
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if(instruction.indexOf("cpy") > -1){
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var instructionParts = instruction.match("cpy ([^ ]+) ([^ ]+)");
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return ["cpy", [instructionParts[1], instructionParts[2]]];
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}
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if(instruction.indexOf("inc") > -1){
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var instructionParts = instruction.match("inc ([^ ]+)");
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return ["inc", [instructionParts[1]]];
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}
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if(instruction.indexOf("dec") > -1){
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var instructionParts = instruction.match("dec ([^ ]+)");
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return ["dec", [instructionParts[1]]];
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}
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if(instruction.indexOf("jnz") > -1){
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var instructionParts = instruction.match("jnz ([^ ]+) ([^ ]+)");
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return ["jnz", [instructionParts[1], instructionParts[2]]];
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}
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if(instruction.indexOf("tgl") > -1){
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var instructionParts = instruction.match("tgl ([^ ]+)");
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return ["tgl", [instructionParts[1]]];
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}
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});
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var pc = 0;
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while(pc < instructions.length){
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instructionSet[instructions[pc][0]].apply(null, instructions[pc][1]);
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pc++;
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}
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console.log(registers);
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