219     Py_off_t write_pos;  member
1660     self->write_pos = 0;  in _bufferedwriter_reset_buf()
1760     if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end)  in _bufferedwriter_flush_unlocked()
1763     rewind = RAW_OFFSET(self) + (self->pos - self->write_pos);  in _bufferedwriter_flush_unlocked()
1771     while (self->write_pos < self->write_end) {  in _bufferedwriter_flush_unlocked()
1773             self->buffer + self->write_pos,  in _bufferedwriter_flush_unlocked()
1774             Py_SAFE_DOWNCAST(self->write_end - self->write_pos,  in _bufferedwriter_flush_unlocked()
1784         self->write_pos += n;  in _bufferedwriter_flush_unlocked()
1785         self->raw_pos = self->write_pos;  in _bufferedwriter_flush_unlocked()
1835         if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) {  in bufferedwriter_write()
1836             self->write_pos = self->pos;  in bufferedwriter_write()
1855         memmove(self->buffer, self->buffer + self->write_pos,  in bufferedwriter_write()
1856                 Py_SAFE_DOWNCAST(self->write_end - self->write_pos,  in bufferedwriter_write()
1858         self->write_end -= self->write_pos;  in bufferedwriter_write()
1859         self->raw_pos -= self->write_pos;  in bufferedwriter_write()
1860         self->pos -= self->write_pos;  in bufferedwriter_write()
1861         self->write_pos = 0;  in bufferedwriter_write()
1938     self->write_pos = 0;  in bufferedwriter_write()