libcxx/src/strstream.cpp

193   off_type newoff;
197     newoff = 0;
200     newoff = (pos_in ? gptr() : pptr()) - eback();
203     newoff = seekhigh - eback();
208   newoff += __off;
209   if (newoff < 0 || newoff > seekhigh - eback())
212   char* newpos = eback() + newoff;
221   return pos_type(newoff);
233   off_type newoff = __sp;
235   if (newoff < 0 || newoff > seekhigh - eback())
238   char* newpos = eback() + newoff;
247   return pos_type(newoff);