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))
}