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using System;
namespace Org.BouncyCastle.Asn1
{
internal class DLSequence
: DerSequence
{
internal static new readonly DLSequence Empty = new DLSequence();
internal static new DLSequence FromVector(Asn1EncodableVector elementVector)
{
return elementVector.Count < 1 ? Empty : new DLSequence(elementVector);
}
private int m_contentsLengthDL = -1;
/**
* create an empty sequence
*/
internal DLSequence()
: base()
{
}
/**
* create a sequence containing one object
*/
internal DLSequence(Asn1Encodable element)
: base(element)
{
}
internal DLSequence(params Asn1Encodable[] elements)
: base(elements)
{
}
/**
* create a sequence containing a vector of objects.
*/
internal DLSequence(Asn1EncodableVector elementVector)
: base(elementVector)
{
}
internal DLSequence(Asn1Encodable[] elements, bool clone)
: base(elements, clone)
{
}
internal override int EncodedLength(int encoding, bool withID)
{
if (Asn1OutputStream.EncodingDer == encoding)
return base.EncodedLength(encoding, withID);
return Asn1OutputStream.GetLengthOfEncodingDL(withID, GetContentsLengthDL());
}
internal override void Encode(Asn1OutputStream asn1Out, bool withID)
{
if (Asn1OutputStream.EncodingDer == asn1Out.Encoding)
{
base.Encode(asn1Out, withID);
return;
}
// TODO[asn1] Use DL encoding when supported
//asn1Out = asn1Out.GetDLSubStream();
asn1Out.WriteIdentifier(withID, Asn1Tags.Constructed | Asn1Tags.Sequence);
int count = elements.Length;
if (m_contentsLengthDL >= 0 || count > 16)
{
asn1Out.WriteDL(GetContentsLengthDL());
for (int i = 0; i < count; ++i)
{
Asn1Object asn1Object = elements[i].ToAsn1Object();
asn1Object.Encode(asn1Out, true);
}
}
else
{
int contentsLength = 0;
Asn1Object[] asn1Objects = new Asn1Object[count];
for (int i = 0; i < count; ++i)
{
Asn1Object asn1Object = elements[i].ToAsn1Object();
asn1Objects[i] = asn1Object;
contentsLength += asn1Object.EncodedLength(asn1Out.Encoding, true);
}
this.m_contentsLengthDL = contentsLength;
asn1Out.WriteDL(contentsLength);
for (int i = 0; i < count; ++i)
{
asn1Objects[i].Encode(asn1Out, true);
}
}
}
internal override Asn1Set ToAsn1Set()
{
return new DLSet(false, elements);
}
private int GetContentsLengthDL()
{
if (m_contentsLengthDL < 0)
{
// TODO[asn1] Use DL encoding when supported
m_contentsLengthDL = CalculateContentsLength(Asn1OutputStream.EncodingBer);
}
return m_contentsLengthDL;
}
}
}
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