2022 Day 10 Complete!

2022/day10/main.go

@@ -0,0 +1,97 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	h "git.bullercodeworks.com/brian/adventofcode/helpers"
+)
+
+func main() {
+	inp := h.StdinToStringSlice()
+	//part1(inp)
+	part2(inp)
+}
+
+func part1(inp []string) {
+	c := NewCPU()
+	c.LoadProgram(inp)
+	c.DoPart = 1
+	fmt.Println(c.Run())
+}
+
+func part2(inp []string) {
+	c := NewCPU()
+	c.LoadProgram(inp)
+	c.DoPart = 2
+	c.Run()
+	fmt.Println()
+}
+
+type CPU struct {
+	cycle int
+	X     int
+
+	prog    []string
+	working string
+
+	DoPart int
+}
+
+func NewCPU() *CPU {
+	return &CPU{cycle: 1, X: 1}
+}
+
+func (c *CPU) Signal() int { return c.cycle * c.X }
+func (c *CPU) LoadProgram(inp []string) {
+	c.prog = make([]string, len(inp))
+	copy(c.prog, inp)
+}
+func (c *CPU) Run() int {
+	var result int
+	var pos int
+	for i := 0; i < len(c.prog); {
+		if c.DoPart == 2 {
+			if pos == 0 {
+				fmt.Println()
+			}
+			if c.X >= pos-1 && c.X <= pos+1 {
+				fmt.Print("#")
+			} else {
+				fmt.Print(".")
+			}
+			pos++
+			if pos == 40 {
+				pos = 0
+			}
+		}
+		c.cycle++
+		if len(c.working) > 0 {
+			c.doWork()
+		} else {
+			switch c.prog[i] {
+			case "noop":
+				c.working = ""
+			default:
+				c.working = c.prog[i]
+			}
+			i++
+		}
+		if c.DoPart == 1 {
+			if c.cycle == 20 || c.cycle == 60 || c.cycle == 100 || c.cycle == 140 || c.cycle == 180 || c.cycle == 220 {
+				result = c.Signal() + result
+			}
+		}
+	}
+	return result
+}
+
+func (c *CPU) doWork() {
+	pts := strings.Fields(c.working)
+	switch pts[0] {
+	case "addx":
+		val := h.Atoi(pts[1])
+		c.X += val
+	}
+	c.working = ""
+}