/// <summary>Creates a CBOR number object from a CBOR object
/// representing a number (that is, one for which the IsNumber property
/// in.NET or the isNumber() method in Java returns true).</summary>
/// <param name='o'>The parameter is a CBOR object representing a
/// number.</param>
/// <returns>A CBOR number object, or null if the given CBOR object is
/// null or does not represent a number.</returns>
public static CBORNumber FromCBORObject(CBORObject o)
{
if (o == null)
{
return(null);
}
if (IsUntaggedInteger(o))
{
if (o.CanValueFitInInt64())
{
return(new CBORNumber(Kind.Integer, o.AsInt64Value()));
}
else
{
return(new CBORNumber(Kind.EInteger, o.AsEIntegerValue()));
}
}
else if (!o.IsTagged && o.Type == CBORType.FloatingPoint)
{
return(CBORNumber.FromObject(o.AsDoubleValue()));
}
if (o.HasOneTag(2) || o.HasOneTag(3))
{
return(BignumToNumber(o));
}
else if (o.HasOneTag(4) ||
o.HasOneTag(5) ||
o.HasOneTag(264) ||
o.HasOneTag(265) ||
o.HasOneTag(268) ||
o.HasOneTag(269))
{
return(BigFracToNumber(o,
o.MostOuterTag.ToInt32Checked()));
}
else if (o.HasOneTag(30) ||
o.HasOneTag(270))
{
return(RationalToNumber(o,
o.MostOuterTag.ToInt32Checked()));
}
else
{
return(null);
}
}
internal static string ToStringHelper(CBORObject obj, int depth)
{
StringBuilder sb = null;
string simvalue = null;
CBORType type = obj.Type;
CBORObject curobject;
if (obj.IsTagged)
{
if (sb == null)
{
if (type == CBORType.TextString)
{
// The default capacity of StringBuilder may be too small
// for many strings, so set a suggested capacity
// explicitly
string str = obj.AsString();
sb = new StringBuilder(Math.Min(str.Length, 4096) + 16);
}
else
{
sb = new StringBuilder();
}
}
// Append opening tags if needed
curobject = obj;
while (curobject.IsTagged)
{
EInteger ei = curobject.MostOuterTag;
sb.Append(ei.ToString());
sb.Append('(');
curobject = curobject.UntagOne();
}
}
switch (type)
{
case CBORType.SimpleValue:
sb = sb ?? new StringBuilder();
if (obj.IsUndefined)
{
sb.Append("undefined");
}
else if (obj.IsNull)
{
sb.Append("null");
}
else
{
sb.Append("simple(");
int thisItemInt = obj.SimpleValue;
char c;
if (thisItemInt >= 100)
{
// NOTE: '0'-'9' have ASCII code 0x30-0x39
c = (char)(0x30 + ((thisItemInt / 100) % 10));
sb.Append(c);
}
if (thisItemInt >= 10)
{
c = (char)(0x30 + ((thisItemInt / 10) % 10));
sb.Append(c);
c = (char)(0x30 + (thisItemInt % 10));
}
else
{
c = (char)(0x30 + thisItemInt);
}
sb.Append(c);
sb.Append(")");
}
break;
case CBORType.Boolean:
case CBORType.Integer:
simvalue = obj.Untag().ToJSONString();
if (sb == null)
{
return(simvalue);
}
sb.Append(simvalue);
break;
case CBORType.FloatingPoint: {
double f = obj.AsDoubleValue();
simvalue = Double.IsNegativeInfinity(f) ? "-Infinity" :
(Double.IsPositiveInfinity(f) ? "Infinity" : (Double.IsNaN(f) ?
"NaN" : obj.Untag().ToJSONString()));
if (sb == null)
{
return(simvalue);
}
sb.Append(simvalue);
break;
}
case CBORType.ByteString: {
sb = sb ?? new StringBuilder();
sb.Append("h'");
byte[] data = obj.GetByteString();
int length = data.Length;
for (var i = 0; i < length; ++i)
{
sb.Append(HexAlphabet[(data[i] >> 4) & 15]);
sb.Append(HexAlphabet[data[i] & 15]);
}
sb.Append("'");
break;
}
case CBORType.TextString: {
if (sb == null)
{
return("\"" + obj.AsString() + "\"");
}
sb.Append('\"');
sb.Append(obj.AsString());
sb.Append('\"');
break;
}
case CBORType.Array: {
sb = sb ?? new StringBuilder();
var first = true;
sb.Append("[");
if (depth >= 50)
{
sb.Append("...");
}
else
{
for (var i = 0; i < obj.Count; ++i)
{
if (!first)
{
sb.Append(", ");
}
sb.Append(ToStringHelper(obj[i], depth + 1));
first = false;
}
}
sb.Append("]");
break;
}
case CBORType.Map: {
sb = sb ?? new StringBuilder();
var first = true;
sb.Append("{");
if (depth >= 50)
{
sb.Append("...");
}
else
{
ICollection <KeyValuePair <CBORObject, CBORObject> > entries =
obj.Entries;
foreach (KeyValuePair <CBORObject, CBORObject> entry
in entries)
{
CBORObject key = entry.Key;
CBORObject value = entry.Value;
if (!first)
{
sb.Append(", ");
}
sb.Append(ToStringHelper(key, depth + 1));
sb.Append(": ");
sb.Append(ToStringHelper(value, depth + 1));
first = false;
}
}
sb.Append("}");
break;
}
default: {
sb = sb ?? new StringBuilder();
sb.Append("???");
break;
}
}
// Append closing tags if needed
curobject = obj;
while (curobject.IsTagged)
{
sb.Append(')');
curobject = curobject.UntagOne();
}
return(sb.ToString());
}