222     Py_off_t write_end;  member
338     (self->writable && self->write_end != -1)
1661     self->write_end = -1;  in _bufferedwriter_reset_buf()
1760     if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end)  in _bufferedwriter_flush_unlocked()
1771     while (self->write_pos < self->write_end) {  in _bufferedwriter_flush_unlocked()
1774             Py_SAFE_DOWNCAST(self->write_end - self->write_pos,  in _bufferedwriter_flush_unlocked()
1839         if (self->pos > self->write_end)  in bufferedwriter_write()
1840             self->write_end = self->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()
1862         avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end,  in bufferedwriter_write()
1867             memcpy(self->buffer + self->write_end, buf.buf, buf.len);  in bufferedwriter_write()
1868             self->write_end += buf.len;  in bufferedwriter_write()
1874         memcpy(self->buffer + self->write_end, buf.buf, avail);  in bufferedwriter_write()
1875         self->write_end += avail;  in bufferedwriter_write()
1915                 self->write_end = self->buffer_size;  in bufferedwriter_write()
1940     self->write_end = remaining;  in bufferedwriter_write()