public void TestAbs()
{
TestCommon.CompareTestEqual(
ToCN(2),
ToCN(-2).Abs());
TestCommon.CompareTestEqual(
ToCN(2),
ToCN(2).Abs());
TestCommon.CompareTestEqual(
ToCN(2.5),
ToCN(-2.5).Abs());
{
CBORNumber objectTemp = ToCN(EDecimal.FromString("6.63"));
CBORNumber objectTemp2 = ToCN(EDecimal.FromString(
"-6.63")).Abs();
TestCommon.CompareTestEqual(objectTemp, objectTemp2);
}
{
CBORNumber objectTemp = ToCN(EFloat.FromString("2.75"));
CBORNumber objectTemp2 = ToCN(EFloat.FromString("-2.75")).Abs();
TestCommon.CompareTestEqual(objectTemp, objectTemp2);
}
{
CBORNumber objectTemp = ToCN(ERational.FromDouble(2.5));
CBORNumber objectTemp2 = ToCN(ERational.FromDouble(-2.5)).Abs();
TestCommon.CompareTestEqual(objectTemp, objectTemp2);
}
}
public DateTime FromCBORObject(CBORObject obj)
{
CBORObject untaggedObject = obj;
if (obj.HasMostOuterTag(0))
{
throw new CBORException("Only numeric representation of date is permitted");
}
else if (obj.HasMostOuterTag(1))
{
Console.WriteLine("Section 2 of RFC8392 states that the leading 1 tag MUST be omitted, but it is present here");
untaggedObject = obj.UntagOne();
}
if (!untaggedObject.IsNumber)
{
throw new CBORException("Expected number for representation of date");
}
CBORNumber num = untaggedObject.AsNumber();
if (!num.IsFinite())
{
throw new CBORException("Not a finite number");
}
if (num.CompareTo(Int64.MinValue) < 0 || num.CompareTo(Int64.MaxValue) > 0)
{
throw new CBORException("Date can not be represented as Instant (too small or large)");
}
// Section 2.4.1 of RFC7049 states:
// Tag value 1 is for numerical representation of seconds relative to
// 1970-01-01T00:00Z in UTC time. (For the non-negative values that the
// Portable Operating System Interface (POSIX) defines, the number of
// seconds is counted in the same way as for POSIX "seconds since the
// epoch" [TIME_T].) The tagged item can be a positive or negative
// integer (major types 0 and 1), or a floating-point number (major type
// 7 with additional information 25, 26, or 27). Note that the number
// can be negative (time before 1970-01-01T00:00Z) and, if a floating-
// point number, indicate fractional seconds.
//
// We only support a positive integer ...
//
if (!num.IsInteger())
{
throw new CBORException(
String.Format("Date is represented as {0} - Only {1} is supported", num.GetType(), CBORNumber.NumberKind.Integer));
}
System.DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, System.DateTimeKind.Utc);
dtDateTime = dtDateTime.AddSeconds(num.ToInt64Unchecked()).ToUniversalTime();
return(dtDateTime);
}
