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)

diff --git a/crypto/bio/bio_dump.c b/crypto/bio/bio_dump.c
index c453da62688c6cf7efab531df38436d8194c7c7b..40c18410e4cf073f7f65530a8967eb5600e655ce 100644 (file)
--- 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)