public static LDim Parse(SqlString s)
{
if (s.IsNull)
{
return(Null);
}
// regular expression to test, extract
string fp = @"-?([0-9]+(\.[0-9]*)?|\.[0-9]+)";
Regex vu = new Regex(@"(?<v>" + fp + @") (?<u>in|ft|yd)");
if (!vu.IsMatch(s.Value))
{
throw new Exception("Bad format", null);
}
Match m = vu.Match(s.Value);
LDim d = new LDim();
d.units = m.Result("${u}");
d.value = decimal.Parse(m.Result("${v}"));
if (!CheckRangeAndAccurcy(d))
{
throw new Exception("Out of range or accuracy", null);
}
return(d);
}
public static SqlString Reverse(LDim dim)
{
if (dim.IsNull)
{
return(SqlString.Null);
}
string sdim = dim.ToString();
char[] chs = sdim.ToCharArray();
Array.Reverse(chs);
return(new string(chs));
}
public LDim GetScaledCNR(SqlDecimal scale)
{
LDim ldim = new LDim();
if (!IsNull)
{
ldim.value = this.value;
ldim.units = this.units;
ldim.value *= scale.Value;
if (!CheckRangeAndAccurcy(ldim))
{
ldim = this;
}
}
return(ldim);
}
static bool CheckRangeAndAccurcy(LDim d)
{
decimal value = d.value;
// check overall range
if (d.units == "in")
{
if ((value > (52800M * 12M)) ||
(value < -(52800M * 12M)))
{
return(false);
}
}
if (d.units == "ft")
{
if ((value > 52800M) ||
(value < -52800M))
{
return(false);
}
}
if (d.units == "yd")
{
if ((value > (52800M / 3M)) ||
(value < -(52800M) / 3M))
{
return(false);
}
}
// check accuracy to 0.001 inches
if (d.units == "ft")
{
value *= 12M;
}
if (d.units == "yd")
{
value *= 36M;
}
decimal norm = value * 1000M;
norm = decimal.Round(norm);
if ((norm - (value * 1000M)) != 0M)
{
return(false);
}
return(true);
}
static public LDim operator +(LDim d1, LDim d2)
{
if (d1.IsNull || d2.IsNull)
{
return(Null);
}
if (d1.units == d2.units)
{
LDim dim = new LDim();
dim.units = d1.units;
dim.value = d1.value + d2.value;
return(dim);
}
LDim dim1 = new LDim();
dim1.units = "in";
dim1.value = d1.Inches.Value + d2.Inches.Value;
return(dim1);
}
void IXmlSerializable.ReadXml(System.Xml.XmlReader reader)
{
XPathDocument xdoc = new XPathDocument(reader);
XPathNavigator nav = xdoc.CreateNavigator();
XmlNamespaceManager nm = new XmlNamespaceManager(nav.NameTable);
nm.AddNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
if ((bool)(nav.Evaluate("boolean(//@xsi:nil = 'true')", nm)))
{
value = 0;
units = null;
}
else
{
LDim dim = Parse((string)(nav.Evaluate(
"concat(//value, ' ', //units)")));
units = dim.units;
value = dim.value;
}
}
