1 files changed, 31 insertions, 0 deletions
diff --git a/vbench/src/vbench/core/buffered_output.cpp b/vbench/src/vbench/core/buffered_output.cpp
new file mode 100644
index 00000000000..36e01e55fd5
--- /dev/null
+++ b/vbench/src/vbench/core/buffered_output.cpp
@@ -0,0 +1,31 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include <vespa/fastos/fastos.h>
+#include "buffered_output.h"
+
+namespace vbench {
+
+BufferedOutput &
+BufferedOutput::printf(const char *fmt, ...)
+{
+    ensureFree(256);
+    int space = (_data.size - _pos);
+    int size;
+    va_list ap;
+    va_start(ap, fmt);
+    size = vsnprintf(_data.data + _pos, space, fmt, ap);
+    va_end(ap);
+    assert(size >= 0);
+    if (size >= space) {
+        space = size + 1;
+        ensureFree(space);
+        va_start(ap, fmt);
+        size = vsnprintf(_data.data + _pos, space, fmt, ap);
+        va_end(ap);
+        assert((size + 1) == space);
+    }
+    _pos += size;
+    return *this;
+}
+
+} // namespace vbench