From 003f90586c1eab5f17cdc85bf0fc43e5f2a170ec Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 6 Oct 2008 14:56:18 +0200
Subject: [PATCH] wreadln: optimize wreadln_delete_char() with memmove()

Let memmove() do the dirty work on overlapping buffers..
---
 src/wreadln.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/wreadln.c b/src/wreadln.c
index 608141f..89bcc12 100644
--- a/src/wreadln.c
+++ b/src/wreadln.c
@@ -136,12 +136,13 @@ wreadln_insert_byte(struct wreadln *wr, gint key)
 static void
 wreadln_delete_char(struct wreadln *wr, size_t x)
 {
-	size_t i;
+	size_t rest;
+	const size_t length = 1;
 
 	assert(x < strlen(wr->line));
 
-	for (i = x; wr->line[i] != 0; i++)
-		wr->line[i] = wr->line[i + 1];
+	rest = strlen(&wr->line[x + length]) + 1;
+	memmove(&wr->line[x], &wr->line[x + length], rest);
 }
 
 /* libcurses version */
-- 
2.30.2