public static bool TryParseSpeed(string s, out KilometerPerHour result)
{
result = (KilometerPerHour)double.MaxValue;
if (string.IsNullOrWhiteSpace(s) || (int)s[0] != 48 && (int)s[0] != 49 && ((int)s[0] != 50 && (int)s[0] != 51) && ((int)s[0] != 52 && (int)s[0] != 53 && ((int)s[0] != 54 && (int)s[0] != 55)) && ((int)s[0] != 56 && (int)s[0] != 57) || s.Contains(","))
{
return(false);
}
double result1;
if (double.TryParse(s, NumberStyles.Any, (IFormatProvider)CultureInfo.InvariantCulture, out result1))
{
result = (KilometerPerHour)result1;
}
if (KilometerPerHour.TryParse(s, out result))
{
return(true);
}
MilesPerHour result2;
if (MilesPerHour.TryParse(s, out result2))
{
result = (KilometerPerHour)result2;
return(true);
}
Knots result3;
if (!Knots.TryParse(s, out result3))
{
return(false);
}
result = (KilometerPerHour)result3;
return(true);
}
/// <summary>
/// Tries to parse a speed value from a given tag-value.
/// </summary>
/// <param name="s"></param>
/// <param name="result"></param>
/// <returns></returns>
public static bool TryParseSpeed(string s, out KilometerPerHour result)
{
result = double.MaxValue;
if (string.IsNullOrWhiteSpace(s))
{
return(false);
}
if (s[0] != '0' && s[0] != '1' && s[0] != '2' && s[0] != '3' && s[0] != '4' &&
s[0] != '5' && s[0] != '6' && s[0] != '7' && s[0] != '8' && s[0] != '9')
{ // performance inprovement, quick negative answer.
return(false);
}
if (s.Contains(','))
{ // refuse comma as a decimal seperator or anywhere else in the number.
return(false);
}
// try regular speed: convention in OSM is km/h in this case.
double kmphDouble;
if (double.TryParse(s, NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out kmphDouble))
{
result = kmphDouble;
}
// try km/h
if (KilometerPerHour.TryParse(s, out result))
{
return(true);
}
// try mph.
MilesPerHour resultMph;
if (MilesPerHour.TryParse(s, out resultMph))
{
result = resultMph;
return(true);
}
// try knots.
Knots resultKnots;
if (Knots.TryParse(s, out resultKnots))
{
result = resultKnots;
return(true);
}
return(false);
}
public void TestKilometerPerHour()
{
// initialize value.
KilometerPerHour ten = 10;
// convert from.
Knots tenInKnots = 5.39956803;
MeterPerSecond tenInMeterPerSecond = 2.77777777778;
MilesPerHour tenInMilesPerHour = 6.21371192;
// test converts to.
Assert.AreEqual(ten.Value, ((KilometerPerHour)tenInKnots).Value, 0.000001);
Assert.AreEqual(ten.Value, ((KilometerPerHour)tenInMeterPerSecond).Value, 0.000001);
Assert.AreEqual(ten.Value, ((KilometerPerHour)tenInMilesPerHour).Value, 0.000001);
// tests division of distance with time resulting in speed.
Kilometer twenty = ten * (Hour)2;
Assert.AreEqual(20, twenty.Value);
// tests some parsing functions.
KilometerPerHour tenPointFive = 10.5;
KilometerPerHour tenPointFiveParsed;
Assert.IsTrue(KilometerPerHour.TryParse(tenPointFive.ToString(), out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5 km/h", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5 kmh", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5 kph", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5 kmph", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5km/h", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5kmh", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5kph", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsTrue(KilometerPerHour.TryParse("10.5kmph", out tenPointFiveParsed));
Assert.AreEqual(tenPointFive.Value, tenPointFiveParsed.Value);
Assert.IsFalse(KilometerPerHour.TryParse("10.5 m/s", out tenPointFiveParsed));
Assert.IsFalse(KilometerPerHour.TryParse("10.5 mph", out tenPointFiveParsed));
Assert.IsFalse(KilometerPerHour.TryParse("10.5 knots", out tenPointFiveParsed));
}