package aoc2019 import ( "io/ioutil" "strings" "github.com/pkg/errors" ) func solveDay5FromFile(inFile string, diagProgram int64) (int64, error) { raw, err := ioutil.ReadFile(inFile) if err != nil { return 0, errors.Wrap(err, "Unable to read input") } code, err := parseIntcode(strings.TrimSpace(string(raw))) if err != nil { return 0, errors.Wrap(err, "Unable to parse Intcode") } var ( in = make(chan int64, 1) out = make(chan int64, len(code)) // There cannot be more outputs than number of code parts outputs []int64 ) /* * The TEST diagnostic program will start by requesting from the user * the ID of the system to test by running an input instruction - provide * it 1, the ID for the ship's air conditioner unit. */ in <- diagProgram if _, err := executeIntcode(code, in, out); err != nil { return 0, errors.Wrap(err, "Program execution failed") } for o := range out { outputs = append(outputs, o) } if len(outputs) < 1 { return 0, errors.New("Program did not yield any output") } for i, check := range outputs[:len(outputs)-1] { if check != 0 { return 0, errors.Errorf("Non-zero check result in position %d: %d", i, check) } } return outputs[len(outputs)-1], nil } func solveDay5Part1(inFile string) (int64, error) { /* * The TEST diagnostic program will start by requesting from the user * the ID of the system to test by running an input instruction - provide * it 1, the ID for the ship's air conditioner unit. */ return solveDay5FromFile(inFile, 1) } func solveDay5Part2(inFile string) (int64, error) { /* * This time, when the TEST diagnostic program runs its input * instruction to get the ID of the system to test, provide it 5, * the ID for the ship's thermal radiator controller. This * diagnostic test suite only outputs one number, the diagnostic code. */ return solveDay5FromFile(inFile, 5) }