From 9a2b240c89bbc0c1f2d969fd59ce458a2b40eab5 Mon Sep 17 00:00:00 2001
From: Arkaitz Jimenez <arkaitzj@gmail.com>
Date: Sun, 3 Jun 2012 20:51:17 +0100
Subject: [PATCH] Show ellipsis sign when log line is truncated

---
 src/rt/rust_sched_loop.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/rt/rust_sched_loop.cpp b/src/rt/rust_sched_loop.cpp
index 697f460d3a6..27883391cce 100644
--- a/src/rt/rust_sched_loop.cpp
+++ b/src/rt/rust_sched_loop.cpp
@@ -54,7 +54,13 @@ rust_sched_loop::log(rust_task* task, uint32_t level, char const *fmt, ...) {
     char buf[BUF_BYTES];
     va_list args;
     va_start(args, fmt);
-    vsnprintf(buf, sizeof(buf), fmt, args);
+    int formattedbytes = vsnprintf(buf, sizeof(buf), fmt, args);
+    if( formattedbytes and (unsigned)formattedbytes > BUF_BYTES ){
+        const char truncatedstr[] = "[...]";
+        memcpy( &buf[BUF_BYTES-sizeof(truncatedstr)],
+                truncatedstr,
+                sizeof(truncatedstr));
+    }
     _log.trace_ln(task, level, buf);
     va_end(args);
 }