From f263e3fe2e11810a517925d580640a21402ae36b Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 21 Nov 2022 17:04:55 -0700
Subject: [PATCH] [cff] Manually copy short strings instead of memcpy()

---
 src/hb-subset-cff-common.hh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/hb-subset-cff-common.hh b/src/hb-subset-cff-common.hh
index c7e858e0b..2b7a2dab3 100644
--- a/src/hb-subset-cff-common.hh
+++ b/src/hb-subset-cff-common.hh
@@ -119,7 +119,11 @@ struct str_encoder_t
       set_error ();
       return;
     }
-    memcpy (buff.arrayZ + offset, &str[0], str.length);
+    /* Since our strings are one or two bytes typically,
+     * this is faster than memcpy. */
+    for (unsigned i = 0; i < str.length; i++)
+      buff.arrayZ[i + offset] = str.arrayZ[i];
+    // memcpy (buff.arrayZ + offset, &str[0], str.length);
   }
 
   bool is_error () const { return error; }