add support for OutputDebugString on windows

cpplog.hpp

@@ -12,6 +12,10 @@
 #include <ctime>
 #include <vector>
 
+#ifdef _WIN32
+#include "outputdebugstram.hpp"
+#endif
+
 // The following #define's will change the behaviour of this library.
 // #define CPPLOG_FILTER_LEVEL <level>
 // Prevents all log messages with level less than <level> from being emitted.
@@ -382,6 +386,17 @@ namespace cpplog
  }
  };
 
+#ifdef _WIN32
+ class OutputDebugStringLogger : public OstreamLogger
+ {
+ private:
+ dbgwin_stream m_stream;
+ public:
+ OutputDebugStringLogger() : OstreamLogger(m_stream)
+ { }
+ };
+#endif
+
  // Log to file.
  class FileLogger : public OstreamLogger
  {

outputdebugstram.hpp

@@ -0,0 +1,45 @@
+#pragma once
+#ifndef _OUTPUT_DEBUG_STREAM_H
+#define _OUTPUT_DEBUG_STREAM_H
+
+#include <windows.h>
+
+template <class Elem>
+class outputdebug_buf: public std::basic_stringbuf<Elem>
+{
+public:
+ virtual int sync ( )
+ {
+ output_debug_string(str().c_str());
+ return 0;
+ }
+private:
+ void output_debug_string(const Elem* e);
+};
+
+template<>
+void outputdebug_buf<char>::output_debug_string(const char* e)
+{
+ ::OutputDebugStringA(e);
+}
+
+template<>
+void outputdebug_buf<wchar_t>::output_debug_string(const wchar_t* e)
+{
+ ::OutputDebugStringW(e);
+}
+
+template <class _Elem>
+class outputdebug_stream: public std::basic_ostream<_Elem>
+{
+public:
+ outputdebug_stream() : std::basic_ostream<_Elem>(new outputdebug_buf<_Elem>())
+ {}
+
+ ~outputdebug_stream(){ delete rdbuf(); }
+};
+
+typedef outputdebug_stream<char> dbgwin_stream;
+typedef outputdebug_stream<wchar_t> wdbgwin_stream;
+
+#endif