From 71f28db1b8e26377d56f0eb0aef01f6c6c3afbd0 Mon Sep 17 00:00:00 2001
From: eug-vs <eugene@eug-vs.xyz>
Date: Wed, 14 Sep 2022 17:44:42 +0300
Subject: feat: implement bitscanAndReset

---
 src/bitboard.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'src/bitboard.c')

diff --git a/src/bitboard.c b/src/bitboard.c
index e9a7d53..cffe40f 100644
--- a/src/bitboard.c
+++ b/src/bitboard.c
@@ -25,6 +25,13 @@ inline Bitboard ls1b(Bitboard bb) {
 /* Log base 2 (aka Trailing Zero Count)
  * Only works for SINGLE Bitboards
  * Useful for calculating bit-index of LS1B */
-inline Bitboard bitscan(Bitboard bb) {
+inline int bitscan(Bitboard bb) {
   return pop_count(ls1b(bb) - 1);
 }
+
+/* Bitscan forward with LS1B reset */
+inline int bitscanAndReset(Bitboard* bb) {
+  int idx = bitscan(*bb);
+  *bb &= *bb - 1;
+  return idx;
+}
-- 
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