/* Compares binary trees rooted at |a| and |b|, making sure that they are identical. */ static int compare_trees (struct rtbst_node *a, struct rtbst_node *b) { int okay; if (a == NULL || b == NULL) { if (a != NULL || b != NULL) { printf (" a=%d b=%d\n", a ? *(int *) a->rtbst_data : -1, b ? *(int *) b->rtbst_data : -1); assert (0); } return 1; } assert (a != b); if (*(int *) a->rtbst_data != *(int *) b->rtbst_data || a->rtbst_rtag != b->rtbst_rtag) { printf (" Copied nodes differ: a=%d b=%d a:", *(int *) a->rtbst_data, *(int *) b->rtbst_data); if (a->rtbst_rtag == RTBST_CHILD) printf ("r"); printf (" b:"); if (b->rtbst_rtag == RTBST_CHILD) printf ("r"); printf ("\n"); return 0; } if (a->rtbst_rtag == RTBST_THREAD) assert ((a->rtbst_link[1] == NULL) != (a->rtbst_link[1] != b->rtbst_link[1])); okay = compare_trees (a->rtbst_link[0], b->rtbst_link[0]); if (a->rtbst_rtag == RTBST_CHILD) okay &= compare_trees (a->rtbst_link[1], b->rtbst_link[1]); return okay; }