wreadln: optimize wreadln_delete_char() with memmove()

Let memmove() do the dirty work on overlapping buffers..

diff --git a/src/wreadln.c b/src/wreadln.c
index 608141f6414e589d6ec74aca7c2610f33694feb1..89bcc123ce371de17e06b2d9f529755b76ed3ca4 100644 (file)
--- 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 */