From d6e4056805f54bb1a0ef41fa3a6a35b70c94edba Mon Sep 17 00:00:00 2001
From: Rose <83477269+AtariDreams@users.noreply.github.com>
Date: Tue, 19 Dec 2023 11:19:38 -0500
Subject: [PATCH] Optimize circular buffer to avoid modulo

CLA: trivial

Avoid doing the division via modulo where possible.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23097)
---
 crypto/bio/bio_dump.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/crypto/bio/bio_dump.c b/crypto/bio/bio_dump.c
index c453da6268..40c18410e4 100644
--- a/crypto/bio/bio_dump.c
+++ b/crypto/bio/bio_dump.c
@@ -141,9 +141,10 @@ int BIO_hex_string(BIO *out, int indent, int width, const void *data,
 
         BIO_printf(out, "%02X:", d[i]);
 
-        j = (j + 1) % width;
-        if (!j)
+        if (++j >= width) {
+            j = 0;
             BIO_printf(out, "\n");
+        }
     }
 
     if (i && !j)