public double ValueForIndex(int index, bool approximate = true)
{
if (approximate || this.indicesWithValue[index])
{
return(IndexStorage.LongToDouble(this[index], IndexStorage.PrecisionMultiplier));
}
return(0.0);
}
public double OffsetFromIndex(int endIndex)
{
////IndexStorage.CheckIndex(endIndex, this.size);
if (this.aggregateInfoUpdateInProgress)
{
Debugger.Break();
}
var index = endIndex;
// Debug.Assert is not enough!
// in some cases like continuous adding of a new item (ShowInsertRow = true)
// without these two checks exception is thrown
if (index < 0)
{
return(this.storage[0]);
}
if (index >= this.storage.Length)
{
return(this.storage[this.storage.Length - 1]);
}
long result = this.storage[index];
if ((index % 2) == 1)
{
result += this.storage[index - 1];
}
index = (index + this.size) >> 1;
while (index != 1)
{
bool comeFromRight = index % 2 == 1;
if (comeFromRight)
{
result += this.aggregateInfo[index - 1];
}
index >>= 1;
}
return(IndexStorage.LongToDouble(result, IndexStorage.PrecisionMultiplier));
}