From 0db25e13fc53548ab531de8a3cb8e0a2e6138c01 Mon Sep 17 00:00:00 2001
From: piaip <piaip@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Fri, 15 May 2009 03:52:36 +0000
Subject: pfterm: don't use bs to optimize when there's wrap concern.

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@4452 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 mbbsd/pfterm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'mbbsd')

diff --git a/mbbsd/pfterm.c b/mbbsd/pfterm.c
index 27c27bff..caedce88 100644
--- a/mbbsd/pfterm.c
+++ b/mbbsd/pfterm.c
@@ -2080,7 +2080,8 @@ fterm_rawmove_opt(int y, int x)
 #endif // !DBG_TEXT_FD
 
     // x--: compare with FTMV_COST: ESC[m;nH costs 5-8 bytes
-    if (x < ft.rx && y >= ft.ry && (adx+ady) < FTMV_COST)
+    // in order to prevent wrap, don't use bs when rx exceed boundary (ft.cols)
+    if (x < ft.rx && y >= ft.ry && (adx+ady) < FTMV_COST && ft.rx < ft.cols)
     {
         while (adx > 0)
             fterm_rawc('\b'), adx--;
-- 
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