/// <returns>total number of items in the sequence.</returns>
public override int Size()
{
// The line map is always 2 entries larger than the number of lines in
// the file. Index 0 is padded out/unused. The last index is the total
// length of the buffer, and acts as a sentinel.
//
return(lines.Size() - 2);
}
private static int FindForwardLine(IntList lines, int idx, int ptr)
{
int end = lines.Size() - 2;
while (idx < end && lines.Get(idx + 2) < ptr)
{
idx++;
}
return(idx);
}