source: orxonox.OLD/trunk/src/lib/util/debug_buffer.cc @ 9917

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...
*/

#include "debug_buffer.h"

#include <stdarg.h>

#include "debug.h"
#include "compiler.h"
#include "threading.h"

/**
 * @brief standard constructor
 */
DebugBuffer::DebugBuffer ()
{
  DebugBuffer::singletonRef = this;

  this->lineCount = 0;
  this->bufferArray[0] = '\0';

  this->setMaxBufferSize(100);
}

DebugBuffer* DebugBuffer::singletonRef = NULL;
std::list<std::string> DebugBuffer::buffer;
char DebugBuffer::bufferArray[DEBUG_BUFFER_SIZE] = "";


/**
 * @brief standard deconstructor
 */
DebugBuffer::~DebugBuffer ()
{
  DebugBuffer::singletonRef = NULL;
}

/**
 * @brief deletes all the Buffers
 */
void DebugBuffer::flush()
{
  this->buffer.clear();
}

/**
 * @brief adds a new Line to the List of Buffers
 * @param line the Line as in the first argument in printf
 */
void DebugBuffer::addBufferLineStatic(const char* line, ...)
{
  static OrxThread::Mutex DebugBuffer__bufferMutex;

  OrxThread::MutexLock bufferLock(&DebugBuffer__bufferMutex);

  va_list arguments;
  va_start(arguments, line);
  vsnprintf(DebugBuffer::bufferArray, DEBUG_BUFFER_SIZE, line, arguments);
  va_end(arguments);

#if DEBUG_LEVEL < 3
  if (DebugBuffer::singletonRef == NULL)
#endif
    printf(DebugBuffer::bufferArray);
#if DEBUG_LEVEL < 3
  else
#else
  if (DebugBuffer::singletonRef != NULL)
#endif
    DebugBuffer::singletonRef->addBufferLine(DebugBuffer::bufferArray);
}

/**
 * @brief add a Line to the List of Buffers
 * @param line
 * @param arguments
 *
 * This function Adds one line to the buffer.
 * and displays the line as the First Line of the display-buffer
 */
void DebugBuffer::addBufferLine(const char* line)
{
  std::string inputBuffer = this->keepBuffer + line;

  unsigned int lineBegin = 0;
  unsigned int lineEnd = 0;
  // adding all the new Lines
  while (lineEnd < inputBuffer.size())
  {
    lineBegin = lineEnd;
    lineEnd = inputBuffer.find('\n', (lineBegin == 0) ? 0: ++lineBegin);
    if (likely(lineEnd != std::string::npos ))
    {
      this->lineCount++;
      this->buffer.push_front(inputBuffer.substr(lineBegin, lineEnd - lineBegin));
    }
    else      // No end of Line reached.
    {
      this->keepBuffer = inputBuffer.substr(lineBegin, inputBuffer.size() - lineBegin);
      break;
    }

    if (inputBuffer[lineBegin] == '\n')
      lineBegin++, lineEnd++;

    if (this->buffer.size() > this->maxBufferSize)
      this->buffer.pop_back();
  }
}

/**
 * @brief displays some nice output from the Debug
 */
void DebugBuffer::debug() const
{
  PRINT(3)("Debugging output to console (not this debug)\n");

  std::list<std::string>::const_iterator bufferLine;
  for (bufferLine = --this->buffer.end(); bufferLine != this->buffer.begin(); --bufferLine)
    printf((*bufferLine).c_str());
}