protocol/aprs: refactored

protocol/aprs/util.go

@@ -0,0 +1,56 @@
+package aprs
+
+import (
+	"strconv"
+	"strings"
+)
+
+func isDigit(b byte) bool {
+	return b >= '0' && b <= '9'
+}
+
+func feetToMeters(v float64) float64 {
+	return v * 0.3048
+
+}
+
+func knotsToMetersPerSecond(v float64) float64 {
+	return v * 0.514444444
+}
+
+func milesToMeters(v float64) float64 {
+	return v * 1609.344
+}
+
+func fahrenheitToCelcius(v float64) float64 {
+	return (v - 32) / 1.8
+}
+
+func fillZeros(s string) string {
+	s = strings.Replace(s, " ", "0", -1)
+	s = strings.Replace(s, ".", "0", -1)
+	return s
+}
+
+func pow(n, exp int) int {
+	if n <= 0 {
+		return 1
+	}
+
+	result := 1
+	for i := 0; i < exp; i++ {
+		result *= n
+	}
+	return result
+}
+
+func parseBytesWithSpaces(b []byte) (int, error) {
+	for i := len(b) - 1; i >= 0; i-- {
+		if b[i] == ' ' {
+			b[i] = '0'
+		} else {
+			break
+		}
+	}
+	return strconv.Atoi(string(b))
+}