add front demo in this project

LFtid1056/cloudfront/code/log4cplus/helpers/snprintf.h

@@ -0,0 +1,62 @@
+// -*- C++ -*-
+//  Copyright (C) 2010-2017, Vaclav Zeman. All rights reserved.
+//  
+//  Redistribution and use in source and binary forms, with or without modifica-
+//  tion, are permitted provided that the following conditions are met:
+//  
+//  1. Redistributions of  source code must  retain the above copyright  notice,
+//     this list of conditions and the following disclaimer.
+//  
+//  2. Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+//  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+//  FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED.  IN NO  EVENT SHALL  THE
+//  APACHE SOFTWARE  FOUNDATION  OR ITS CONTRIBUTORS  BE LIABLE FOR  ANY DIRECT,
+//  INDIRECT, INCIDENTAL, SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLU-
+//  DING, BUT NOT LIMITED TO, PROCUREMENT  OF SUBSTITUTE GOODS OR SERVICES; LOSS
+//  OF USE, DATA, OR  PROFITS; OR BUSINESS  INTERRUPTION)  HOWEVER CAUSED AND ON
+//  ANY  THEORY OF LIABILITY,  WHETHER  IN CONTRACT,  STRICT LIABILITY,  OR TORT
+//  (INCLUDING  NEGLIGENCE OR  OTHERWISE) ARISING IN  ANY WAY OUT OF THE  USE OF
+//  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef LOG4CPLUS_HELPERS_SNPRINTF_H
+#define LOG4CPLUS_HELPERS_SNPRINTF_H
+
+#include <log4cplus/config.hxx>
+
+#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
+#pragma once
+#endif
+
+#include <log4cplus/tchar.h>
+#include <cstdarg>
+#include <vector>
+
+
+namespace log4cplus { namespace helpers {
+
+
+class LOG4CPLUS_EXPORT snprintf_buf
+{
+public:
+    snprintf_buf ();
+
+    tchar const * print (tchar const * fmt, ...)
+        LOG4CPLUS_FORMAT_ATTRIBUTE (__printf__, 2, 3);
+
+    int print_va_list (tchar const * & str, tchar const * fmt, std::va_list)
+        LOG4CPLUS_FORMAT_ATTRIBUTE (__printf__, 3, 0);
+
+private:
+    std::vector<tchar> buf;
+};
+  
+
+} } // namespace log4cplus { namespace helpers
+
+
+
+#endif // LOG4CPLUS_HELPERS_SNPRINTF_H