source: orxonox.OLD/branches/std/src/lib/util/multi_type.cc @ 7202

/*
   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: ...
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_

#include "multi_type.h"

//#include "stdincl.h"
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sstream>

#ifdef DEBUG
#include "debug.h"
#endif

using namespace std;

/**
 * @brief creates a multiType without any stored value at all.
 */
MultiType::MultiType(MT_Type type)
{
  this->type = type;
  switch (this->type)
  {
    case MT_BOOL:
      this->value.Bool = false;
      break;
    case MT_INT:
      this->value.Int = 0;
      break;
    case MT_FLOAT:
      this->value.Float = 0.0f;
      break;
    case MT_CHAR:
      this->value.Char = '\0';
      break;
    case MT_STRING:
      this->storedString = "";
      break;
  }
}
/**
 * @brief creates a multiType out of a boolean
 * @param value the Value of this MulitType
 */
MultiType::MultiType(bool value)
{
  this->setBool(value);
}

/**
 * @brief creates a multiType out of an integer
 * @param value the Value of this MulitType
 */
MultiType::MultiType(int value)
{
  this->setInt(value);
}

/**
 * @brief creates a multiType out of a float (double)
 * @param value the Value of this MulitType
 */
MultiType::MultiType(double value)
{
  this->setFloat(value);
}

/**
 * @brief creates a multiType out of a char
 * @param value the Value of this MulitType
 */
MultiType::MultiType(char value)
{
  this->setChar(value);
}

/**
 * @brief creates a multiType out of a C-String
 * @param value the Value of this MulitType
 */
MultiType::MultiType(const char* value)
{
  this->setString(value);
}

/**
 * @brief creates a multiType out of a String
 * @param value the Value of this MulitType
 */
MultiType::MultiType(const std::string& value)
{
  this->setString(value);
}

/**
 * @brief constructs a new MultiType from another one (copy)
 */
MultiType::MultiType(const MultiType& multiType)
{
  *this = multiType;
}

/**
 * @brief standard deconstructor
*/
MultiType::~MultiType ()
{ }

/**
 * @brief copy operator
 * @param mt: the entity to copy
 * @returns A Copy of itself. (strings inside are copied as well)
 */
MultiType& MultiType::operator= (const MultiType& mt)
{
  this->type = mt.type;
  this->value = mt.value;
  this->storedString = mt.storedString;

  return *this;
}

/**
 * @brief checks if the two Multitypes match
 * @param mt MultiType to check against this one
 * @returns true on match. false otherwise
 *
 * Two MultiType match if and only if
 *  1. the internal Type is the same
 *  2. the stored values match
 */
bool MultiType::operator==(const MultiType& mt) const
{
  if (this->type != mt.type)
    return false;

  switch (this->type)
  {
    case MT_NULL:
      return true;
    case MT_BOOL:
      return (this->value.Bool == mt.value.Bool);
    case MT_INT:
      return (this->value.Int == mt.value.Int);
    case MT_CHAR:
      return (this->value.Char == mt.value.Char);
    case MT_FLOAT:
      return (this->value.Float == mt.value.Float);
    case MT_STRING:
      return (this->storedString == mt.storedString);
  }
}


/**
 * @brief sets the type of this MultiType and resets to the default value
 * @param type the new Type
 */
void MultiType::setType(MT_Type type)
{
  if (this->type == type)
    return;

  switch (type)
  {
    case MT_BOOL:
      this->setBool(this->getBool());
      break;
    case MT_INT:
      this->setInt(this->getInt());
      break;
    case MT_FLOAT:
      this->setFloat(this->getFloat());
      break;
    case MT_CHAR:
      this->setChar(this->getChar());
      break;
    case MT_STRING:
      this->setString(this->getString());
      break;
  }
}

/**
 * @brief sets the Value of mt without changing the type of this MultiType
 * @param mt: the MultiType to get the value from
 *
 * This is a pure Value copy. The current type will be preserved.
 *
 * @TODO speedup
 */
void MultiType::setValueOf(const MultiType& mt)
{
  MT_Type prevType = this->type;

  *this = mt;
  this->setType(prevType);
}


/**
 * @brief sets a new Value to the MultiType
 * @param value the new Value as a bool
 */
void MultiType::setBool(bool value)
{
  this->type = MT_BOOL;
  this->value.Bool = value;
}

/**
 * @brief sets a new Value to the MultiType
 * @param value the new Value as an int
 */
void MultiType::setInt(int value)
{
  this->type = MT_INT;
  this->value.Int = value;
}

/**
 * @brief sets a new Value to the MultiType
 * @param value the new Value as a float
 */
void MultiType::setFloat(float value)
{
  this->type = MT_FLOAT;
  this->value.Float = value;
}

/**
 * @brief sets a new Value to the MultiType
 * @param value the new Value as a char
 */
void MultiType::setChar(char value)
{
  this->type = MT_CHAR;
  this->value.Char = value;
}

/**
 * @brief sets a new Value to the MultiType
 * @param value the new Value as a String
 */
void MultiType::setString(const std::string& value)
{
  this->type = MT_STRING;
  this->storedString = value;
}


/**************************
*** RETRIEVAL FUNCTIONS ***
**************************/
/**
 * @returns the Value of this MultiType as a int
 */
bool MultiType::getBool() const
{
  // default case:
  if (this->type & MT_BOOL)
    return this->value.Bool;
  // Special Cases:
  else if (this->type & MT_INT) return (this->value.Int == 0)? false : true;
  else if (this->type & MT_FLOAT) return (this->value.Float == 0.0f)? false : true;
  else if (this->type & MT_CHAR) return (this->value.Char == '\0')? false : true;
  else if (this->type & MT_STRING) return (this->storedString == "true" ||
                                            this->storedString == "TRUE" ||
                                            this->storedString != "0"); //! @TODO make this better...

  return false;
}

/**
 * @returns the Value of this MultiType as a int
 */
int MultiType::getInt() const
{
  // default case:
  if (this->type & MT_INT)
    return this->value.Int;
  if (this->type & MT_BOOL) return (this->value.Bool)? 1 : 0;
  else if (this->type & MT_FLOAT) return (int) this->value.Float;
  else if (this->type & MT_CHAR) return (int) this->value.Char;
  else if (this->type & MT_STRING)
  {
    if (this->storedString == "") return 0;
    char* endPtr = NULL;
    int result = strtol(this->storedString.c_str(), &endPtr, 10);
    if ( endPtr >= this->storedString.c_str() && endPtr < this->storedString.c_str() + strlen(this->storedString.c_str()))
      return 0;
    else
      return result;
  }
  return 0;
}


/**
 * @returns the Value of this MultiType as a float
 */
float MultiType::getFloat() const
{
  // default case:
  if (this->type & MT_FLOAT)
    return this->value.Float;
  if (this->type & MT_BOOL) return (this->value.Bool == true)? 1.0f : 0.0f;
  else if (this->type & MT_INT) return (float) this->value.Int;
  else if (this->type & MT_CHAR) return (float) this->value.Char;
  else if (this->type & MT_STRING)
  {
    char* endPtr = NULL;
    double result = strtod(this->storedString.c_str(), &endPtr);
    if ( endPtr >= this->storedString.c_str() && endPtr < this->storedString.c_str() + strlen(this->storedString.c_str()))
      return 0.0f;
    else
      return result;
  }
  return 0.0f;
}


/**
 * @returns the Value of this MultiType as a char
 */
char MultiType::getChar() const
{
  // default case:
  if (this->type & MT_INT)
    return this->value.Int;
  if (this->type & MT_BOOL) return (this->value.Bool)? 'y' : 'n';
  else if (this->type & MT_INT) return (int) this->value.Int;
  else if (this->type & MT_FLOAT) return (char) this->value.Float;
  else if (this->type & MT_STRING) return this->storedString[0];

  return '\0';
}


/**
 * @returns the Value of this MultiType as a String
 */
std::string MultiType::getString() const
{
  // default case:
  if (this->type & MT_STRING)
    return this->storedString;
  else
  {
    if (this->type & MT_BOOL) return (this->value.Bool)? "true" : "false";

    else if (this->type & MT_INT)
    {
      char tmpString[32];
      sprintf(tmpString, "%d", this->value.Int);
      return tmpString;
    }
    else if (this->type & MT_FLOAT)
    {
      char tmpString[64];
      sprintf(tmpString, "%f", this->value.Float);
      return tmpString;
    }
    else if (this->type & MT_CHAR)
    {
      char tmpString[2];
      tmpString[0] = this->value.Char;
      tmpString[1] = '\0';
      return tmpString;
    }
  }
  return "";
}

/**
 * @returns a formated c-string of the held value
 */
const char* MultiType::getCString()
{
  if (this->type & MT_STRING) return this->storedString.c_str();
  else
  {
    this->storedString = this->getString();
    return this->storedString.c_str();
  }
}

/**
 * @brief prints out some nice debug output
 */
void MultiType::debug() const
{
#ifdef DEBUG
  PRINT(0)
#else
  printf
#endif
  ("MultiType of Type '%s' :: Values: BOOL: '%d', INT: '%d', FLOAT: '%f', CHAR: '%c', STRING '%s'\n",
   MultiType::MultiTypeToString(this->type),
   this->getBool(),
   this->getInt(),
   this->getFloat(),
   this->getChar(),
   this->getString().c_str()
  );
}


/**
 * @brief Resets the MultiType to default values.
 */
void MultiType::reset()
{
  switch ( this->type )
  {
    case MT_BOOL:
      this->setBool(false);
      break;
    case MT_INT:
      this->setInt(0);
      break;
    case MT_FLOAT:
      this->setFloat(0.0f);
      break;
    case MT_CHAR:
      this->setChar('\0');
      break;
    case MT_STRING:
      this->setString("");
      break;
    default:
#ifdef DEBUG
      PRINTF(2)("Unknown Type not reseting\n");
#endif
      break;
  }
}

/**
 * @brief converts a MT_Type into a String
 * @param type: the MT_Type
 * @returns: the Type as a constant String (do not delete)
 */
const char* MultiType::MultiTypeToString(MT_Type type)
{
  switch ( type )
  {
    case MT_BOOL:
      return "bool";
    case MT_INT:
      return "int";
    case MT_FLOAT:
      return "float";
    case MT_CHAR:
      return "char";
    case MT_STRING:
      return "string";
  }
  return "NONE";
}

/**
 * @brief converts a String into a MT_Type
 * @param type: the Type as a String
 * @returns: the Type as MT_Type
 */
MT_Type MultiType::StringToMultiType(const char* type)
{
  if (!strncmp(type, "bool", 4))
    return MT_BOOL;
  if (!strncmp(type, "int", 3))
    return MT_INT;
  if (!strncmp(type, "float", 5))
    return MT_FLOAT;
  if (!strncmp(type, "char", 4))
    return MT_CHAR;
  if (!strncmp(type, "string", 6))
    return MT_STRING;

  return MT_NULL;
}