private IntList LineMap(int ptr, int end)
{
// Experimentally derived from multiple source repositories
// the average number of bytes/line is 36. Its a rough guess
// to initially size our map close to the target.
//
IntList map = new IntList((end - ptr) / 36);
map.FillTo(1, int.MinValue);
for (; ptr < end; ptr = NextLF(ptr))
{
map.Add(ptr);
}
map.Add(end);
return(map);
}
