chore: cleanup

utils.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"crypto/sha1"
+	"fmt"
+	"strconv"
+)
+
+func rgbFromHex(hex string) (int, int, int) {
+	r, _ := strconv.ParseUint(hex[0:2], 16, 8)
+	g, _ := strconv.ParseUint(hex[2:4], 16, 8)
+	b, _ := strconv.ParseUint(hex[4:6], 16, 8)
+	return int(r), int(g), int(b)
+}
+
+func hash(str string) string {
+	h := sha1.New()
+	h.Write([]byte(str))
+	res := h.Sum(nil)
+	return fmt.Sprintf("%x", res)
+}
+
+func hasBit(n uint64, pos int) bool {
+    val := n & (1 << pos)
+    return (val > 0)
+}