/*
     Tracer.h
  
     Copyright (C) 2002-2004 René Nyffenegger
  
     This source code is provided 'as-is', without any express or implied
     warranty. In no event will the author be held liable for any damages
     arising from the use of this software.
  
     Permission is granted to anyone to use this software for any purpose,
     including commercial applications, and to alter it and redistribute it
     freely, subject to the following restrictions:
  
     1. The origin of this source code must not be misrepresented; you must not
        claim that you wrote the original source code. If you use this source code
        in a product, an acknowledgment in the product documentation would be
        appreciated but is not required.
  
     2. Altered source versions must be plainly marked as such, and must not be
        misrepresented as being the original source code.
  
     3. This notice may not be removed or altered from any source distribution.
  
     The most current version of Tracer.h can be found at
     http://www.adp-gmbh.ch/cpp/common/Tracer.html
  
     René Nyffenegger rene.nyffenegger@adp-gmbh.ch
  */
  
  ifndef TRACER_H__
  define TRACER_H__
  
  include <hush/export.h>
  ifdef DO_TRACE 
  
  include <string>
  include <sstream>
  
  include <windows.h>
  
  define StartTrace(x)    TraceFunc_::StartTrace_(x)
  define Trace(x)         dummy_____for_trace_func______.Trace_(x)
  define Trace2(x,y)      dummy_____for_trace_func______.Trace_(x,y)
  define TraceFunc(x)     TraceFunc_ dummy_____for_trace_func______(x)
  define TraceFunc2(x,y)  TraceFunc_ dummy_____for_trace_func______(x,y)
  
  class  TraceFunc_ {
    std::string func_name_;
    public:
      /*
        Calling TraceFunc_ indents the output until the enclosing scope ( {...} )
        is left.
      */
      TraceFunc_(std::string const&);
      TraceFunc_(std::string const&, std::string const& something);
     ~TraceFunc_();
  
     /*
        Creates the trace output file named by filename.
        Must be called before any other tracing function.
        Use the StartTrace macro for it.
     */
     static void StartTrace_(std::string const& filename);
  
     template <class T>
     void Trace_(T const& t) {
       DWORD d;
       std::string indent_s;
       std::stringstream s;
  
       s << t;
    
       for (int i=0; i< indent; i++) indent_s += " ";
    
       ::WriteFile(trace_file_,indent_s.c_str(), indent_s.size(), &d, 0);
       ::WriteFile(trace_file_, s.str().c_str(), s.str().size() ,&d, 0);
       ::WriteFile(trace_file_,"\x0a",1,&d,0);
     }
  
     template <class T, class U>
     void Trace_(T const& t, U const& u) {
       std::string indent_s;
       std::stringstream s;
  
       s << t;
       s << u;
       Trace_(s.str());
     }
  
     static int indent;
     /*  trace_file_ is a HANDLE for the file in which the traced output goes.
         The file is opened (that is, created) by calling StartTrace_.
         Better yet, use the StartTrace macro
         to create the file.
     */
     static HANDLE trace_file_;
  };
  
  else
  
  define StartTrace(x)
  define Trace(x)
  define Trace2(x,y)
  define TraceFunc(x)
  define TraceFunc2(x,y)
  
  endif
  
  endif  // TRACER_H__