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Introduce a new dsf_equivalent() function.

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Not very interesting, but the idiom for checking equivalence via two
calls to dsf_canonify is cumbersome enough to be worth abbreviating.
This commit is contained in:
Simon Tatham
2023-04-20 15:32:10 +01:00
parent 088fdeee38
commit 14e1e05510
7 changed files with 28 additions and 18 deletions
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2
divvy.c
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@ -632,7 +632,7 @@ DSF *divvy_rectangle_attempt(int w, int h, int k, random_state *rs)
dsf_merge(tmpdsf, y*w+x, (y+1)*w+x);
for (i = 0; i < wh; i++) {
j = dsf_canonify(retdsf, i);
assert(dsf_canonify(tmpdsf, j) == dsf_canonify(tmpdsf, i));
assert(dsf_equivalent(tmpdsf, j, i));
}
cleanup: