double add_delta(delta const& d)
{
deltas.push_back(d);
x+=d.d;
if (tmax<d.t)
tmax=d.t;
}
void index() {
file->seekg(0);
line_begins.clear();
line_begins.push_back(file->tellg());
while (!file->eof()) {
file->ignore(std::numeric_limits<std::streamsize>::max(), linesep); //FIXME: does setting max unsigned really work here? not if you have very very long lines ;) but those don't fit into memory.
pos end = file->tellg();
if (end > line_begins.back())
line_begins.push_back(end);
}
// should never be needed!
Assert(file->tellg() == line_begins.back());
/* pos eof=file->tellg();
if (eof > line_begins.back()) { // only necessary to handle lack of trailing newline in a friendly way
line_begins.push_back(eof);
}*/
file->clear(); // don't want EOF flag stopping reads.
line_begins.compact();
}