In S_sv_pos_u2b_midway, inline the call to S_sv_pos_u2b_forwards.

1 files changed, 9 insertions, 2 deletions

diff --git a/sv.c b/sv.c
index c38a318f74..45a98946ef 100644
--- a/sv.c
+++ b/sv.c
@@ -6110,7 +6110,7 @@ S_sv_pos_u2b_forwards(const U8 *const start, const U8 *const send,
    the passed in UTF-8 offset.  */
 static STRLEN
 S_sv_pos_u2b_midway(const U8 *const start, const U8 *send,
-		      const STRLEN uoffset, const STRLEN uend)
+		    STRLEN uoffset, const STRLEN uend)
 {
     STRLEN backw = uend - uoffset;
 
@@ -6120,7 +6120,14 @@ S_sv_pos_u2b_midway(const U8 *const start, const U8 *send,
 	/* The assumption is that going forwards is twice the speed of going
 	   forward (that's where the 2 * backw comes from).
 	   (The real figure of course depends on the UTF-8 data.)  */
-	return sv_pos_u2b_forwards(start, send, uoffset);
+	const U8 *s = start;
+
+	while (s < send && uoffset--)
+	    s += UTF8SKIP(s);
+	assert (s <= send);
+	if (s > send)
+	    s = send;
+	return s - start;
     }
 
     while (backw--) {