17 void xrow_add(xrow_t*xrow, int32_t x);
18 void xrow_sort(xrow_t*xrow);
19 int xrow_find(xrow_t*r, int32_t x);
20 char xrow_contains(xrow_t*xrow, int32_t x);
21 void xrow_dump(xrow_t*xrow, double gridsize);
22 void xrow_reset(xrow_t*xrow);
23 void xrow_destroy(xrow_t*xrow);