Extending boost::filesystem for Windows and Linux: Part 1

/************************************************************
 *                                                          *
 *          Written by Stanic Igor 2012/2013                *
 *  Header with basic defines/typedefs. This is the place   *
 *  where you need to define the platform you target        *
 *  compilation for(WINDOWS/LINUX).                         *
 *                                                          *
 ************************************************************/

#ifndef BASEDECL_BOOST_FILESYSTEM_HELPER_H
#define BASEDECL_BOOST_FILESYSTEM_HELPER_H

/***********************************************/
//Change define to specify platform where you
//need to compile
/***********************************************/
#define WINDOWS
//#define LINUX

#include <string>
#include <sstream>
#include <typeinfo>
#include <limits>


#ifdef WINDOWS
typedef std::wstring STRING_TYPE;
typedef std::wstringstream STR_STREAM;

#define EMPTYSTR std::wstring()
//char array literal to wchar_t array
#define CHRARR_CON(x) L ##x

#elif defined(LINUX)
typedef std::string STRING_TYPE;
typedef std::stringstream STR_STREAM;

#define EMPTYSTR std::string()
#define CHRARR_CON(x) STRING_TYPE(x)
#define CH_TYPE(x) x

#endif

typedef long long LLONG;
typedef unsigned long long ULLONG;
typedef unsigned int UINT;
typedef unsigned long ULONG;
#define STR_SET Helpers::STRING_TYPES<STRING_TYPE, STR_STREAM>

template<typename TSTR = STRING_TYPE>
inline bool IS_W_STRING()
{
    return typeid(TSTR) == typeid(std::wstring);
}

inline std::wstring TO_STRING_TYPE(const std::wstring& str)
{
    return str;
}

template<typename TSTR = STRING_TYPE>
inline TSTR TO_STRING_TYPE(const std::string& str)
{
#ifdef WINDOWS
        TSTR retval(str.begin(), str.end());
        return retval;
#elif defined(LINUX)
        return str;
#endif
}

template<typename TSTR = STRING_TYPE>
inline TSTR TO_STRING_TYPE(const char* chars)
{
        std::string temp(chars);
#ifdef WINDOWS
        TSTR retval(temp.begin(), temp.end());
        return retval;
#elif defined(LINUX)
        return temp;
#endif
}

#endif // BASEDECL_H