/**
* Compute a <code>PreCompInfo</code> for a point on this curve, under a given name. Used by
* <code>ECMultiplier</code>s to save the precomputation for this <code>ECPoint</code> for use
* by subsequent multiplication.
*
* @param point
* The <code>ECPoint</code> to store precomputations for.
* @param name
* A <code>String</code> used to index precomputations of different types.
* @param callback
* Called to calculate the <code>PreCompInfo</code>.
*/
public virtual PreCompInfo Precompute(ECPoint point, string name, IPreCompCallback callback)
{
CheckPoint(point);
IDictionary table;
lock (point)
{
table = point.m_preCompTable;
if (null == table)
{
point.m_preCompTable = table = BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities.Platform.CreateHashtable(4);
}
}
lock (table)
{
PreCompInfo existing = (PreCompInfo)table[name];
PreCompInfo result = callback.Precompute(existing);
if (result != existing)
{
table[name] = result;
}
return(result);
}
}
/**
* Compute a <code>PreCompInfo</code> for a point on this curve, under a given name. Used by
* <code>ECMultiplier</code>s to save the precomputation for this <code>ECPoint</code> for use
* by subsequent multiplication.
*
* @param point
* The <code>ECPoint</code> to store precomputations for.
* @param name
* A <code>String</code> used to index precomputations of different types.
* @param callback
* Called to calculate the <code>PreCompInfo</code>.
*/
public virtual PreCompInfo Precompute(ECPoint point, string name, IPreCompCallback callback)
{
CheckPoint(point);
IDictionary table;
lock (point)
{
table = point.m_preCompTable;
if (null == table)
{
point.m_preCompTable = table = new Dictionary <object, object>(4);
}
}
lock (table)
{
PreCompInfo existing = (PreCompInfo)table[name];
PreCompInfo result = callback.Precompute(existing);
if (result != existing)
{
table[name] = result;
}
return(result);
}
}
