243   unsigned PieceOffs = 0;  in split()  local
245   while (Offset >= PieceOffs+Pieces[i].size()) {  in split()
246     PieceOffs += Pieces[i].size();  in split()
252   if (PieceOffs == Offset)  in split()
257   unsigned IntraPieceOffset = Offset-PieceOffs;  in split()
339   unsigned PieceOffs = 0;  in erase()  local
341   for (; Offset > PieceOffs; ++i)  in erase()
342     PieceOffs += getPiece(i).size();  in erase()
343   assert(PieceOffs == Offset && "Split didn't occur before erase!");  in erase()
349   for (; Offset+NumBytes > PieceOffs+getPiece(i).size(); ++i)  in erase()
350     PieceOffs += getPiece(i).size();  in erase()
353   if (Offset+NumBytes == PieceOffs+getPiece(i).size()) {  in erase()
354     PieceOffs += getPiece(i).size();  in erase()
369     unsigned CoverBytes = PieceOffs-Offset;  in erase()