From 5eb5480fe1954e6f72548bff7e23f1f446465df3 Mon Sep 17 00:00:00 2001
From: piaip <piaip@63ad8ddf-47c3-0310-b6dd-a9e9d9715204>
Date: Sun, 22 Apr 2012 14:32:26 +0000
Subject: Fix utf8 output mode issue

git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5668 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
---
 pttbbs/mbbsd/io.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pttbbs/mbbsd/io.c b/pttbbs/mbbsd/io.c
index 63325338..51c7163d 100644
--- a/pttbbs/mbbsd/io.c
+++ b/pttbbs/mbbsd/io.c
@@ -7,6 +7,14 @@
 #define OBUFSIZE  3072
 #define IBUFSIZE  128
 
+// When CONVERT is applied, we may need to write extra N bytes into buffer for
+// one character input. Currently the number is 3 (UTF8).
+#ifdef CONVERT
+# define OBUFMINSPACE (3)
+#else
+# define OBUFMINSPACE (1)
+#endif
+
 #ifdef DEBUG
 #define register
 #define inline
@@ -129,7 +137,7 @@ ochar(int c)
     szLastOutput ++;
 #endif // DBG_OUTRPT
 
-    if (vbuf_is_full(pvout))
+    if (vbuf_space(pvout) < OBUFMINSPACE)
         oflush();
 
 #ifdef CONVERT
-- 
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