From f7399b05f94c3bf39469d7255b619850534da58f Mon Sep 17 00:00:00 2001
From: Arun Prakash Jana <engineerarun@gmail.com>
Date: Mon, 25 Dec 2017 01:44:48 +0530
Subject: [PATCH] Optimize xmemrchr()

---
 nnn.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/nnn.c b/nnn.c
index 1a28e997..0fe58661 100644
--- a/nnn.c
+++ b/nnn.c
@@ -433,17 +433,19 @@ xstrcmp(const char *s1, const char *s2)
 static void *
 xmemrchr(uchar *s, uchar ch, size_t n)
 {
+	static uchar *ptr;
+
 	if (!s || !n)
 		return NULL;
 
-	s = s + n - 1;
+	ptr = s + n;
 
-	while (n) {
-		if (*s == ch)
-			return s;
+	do {
+		--ptr;
 
-		--n, --s;
-	}
+		if (*ptr == ch)
+			return ptr;
+	} while (s != ptr);
 
 	return NULL;
 }