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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
signpost.c
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@ -173,7 +173,7 @@ static bool isvalidmove(const game_state *state, bool clever,
/* can't create a new connection between cells in the same region
* as that would create a loop. */
if (dsf_canonify(state->dsf, from) == dsf_canonify(state->dsf, to))
if (dsf_equivalent(state->dsf, from, to))
return false;
/* if both cells are actual numbers, can't drag if we're not