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[Refactor] #37353 コメント整理 / Refactor comments.
[hengband/hengband.git]
/
src
/
z-util.c
diff --git
a/src/z-util.c
b/src/z-util.c
index
2f4c1df
..
d11e840
100644
(file)
--- a/
src/z-util.c
+++ b/
src/z-util.c
@@
-266,3
+266,19
@@
void s64b_mod(s32b *A1, u32b *A2, s32b B1, u32b B2)
s64b_sub(A1, A2, tmp1, tmp2);
}
+/*!
+* @brief 符号なし32ビット整数のビット数を返す。
+* @param x ビット数を調べたい変数
+* @return ビット数
+*/
+int count_bits(BIT_FLAGS x)
+{
+ int n = 0;
+
+ if (x) do
+ {
+ n++;
+ } while (0 != (x = x&(x - 1)));
+
+ return (n);
+}