{amin, omin, \
"Width and height for this grid type must both be at least " #amin, \
"At least one of width and height for this grid type must be at least " #omin,},
-enum { GRIDLIST(GRID_LOOPYTYPE) };
+enum { GRIDLIST(GRID_LOOPYTYPE) LOOPY_GRID_DUMMY_TERMINATOR };
static char const *const gridnames[] = { GRIDLIST(GRID_NAME) };
#define GRID_CONFIGS GRIDLIST(GRID_CONFIG)
static grid_type grid_types[] = { GRIDLIST(GRID_GRIDTYPE) };
state->lines[e_next - g->edges] != state->lines[i])
break;
+ if (e_next == e) {
+ /*
+ * Special case: we might have come all the
+ * way round a loop and found our way back to
+ * the same edge we started from. In that
+ * situation, we must terminate not only this
+ * while loop, but the 'for' outside it that
+ * was tracing in both directions from the
+ * starting edge, because if we let it trace
+ * in the second direction then we'll only
+ * find ourself traversing the same loop in
+ * the other order and generate an encoded
+ * move string that mentions the same set of
+ * edges twice.
+ */
+ goto autofollow_done;
+ }
+
dot = (e_next->dot1 != dot ? e_next->dot1 : e_next->dot2);
if (movelen > movesize - 40) {
movesize = movesize * 5 / 4 + 128;
(int)(e_this - g->edges), button_char);
}
}
+ autofollow_done:;
}
}