X-Git-Url: https://git.tcpdump.org/libpcap/blobdiff_plain/d6a15166ef0d55f113d53f49462abe100cba893b..c82a08e93128e63ae1ca843fd6fd08e76e7eda40:/optimize.c

diff --git a/optimize.c b/optimize.c
index dba8edfd..a284d413 100644
--- a/optimize.c
+++ b/optimize.c
@@ -63,8 +63,26 @@ extern int _w32_ffs (int mask);
 #define ffs _w32_ffs
 #endif
 
+/*
+ * So is the check for _MSC_VER done because MinGW has this?
+ */
 #if defined(_WIN32) && defined (_MSC_VER)
-int ffs(int mask);
+/*
+ * ffs -- vax ffs instruction
+ *
+ * XXX - with versions of VS that have it, use _BitScanForward()?
+ */
+static int
+ffs(int mask)
+{
+	int bit;
+
+	if (mask == 0)
+		return(0);
+	for (bit = 1; !(mask & 1); bit++)
+		mask >>= 1;
+	return(bit);
+}
 #endif
 
 /*