text: // This code is in the public domain -- castano@gmail.com
  
  #include "FileSystem.h"
  
  #if NV_OS_WIN32
  #define _CRT_NONSTDC_NO_WARNINGS // _chdir is defined deprecated, but that's a bug, chdir is deprecated, _chdir is *not*.
  //#include <shlwapi.h> // PathFileExists
  #include <windows.h> // GetFileAttributes
  #include <direct.h> // _mkdir
  #elif NV_OS_XBOX
  #include <Xtl.h>
  #else
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <unistd.h>
  #endif
  #include <stdio.h> // remove, unlink
  
  using namespace nv;
  
  
  bool FileSystem::exists(const char * path)
  {
  #if NV_OS_UNIX
  	return access(path, F_OK|R_OK) == 0;
  	//struct stat buf;
  	//return stat(path, &buf) == 0;
  #elif NV_OS_WIN32 || NV_OS_XBOX
      // PathFileExists requires linking to shlwapi.lib
      //return PathFileExists(path) != 0;
      return GetFileAttributesA(path) != INVALID_FILE_ATTRIBUTES;
  #else
  	if (FILE * fp = fopen(path, "r"))
  	{
  		fclose(fp);
  		return true;
  	}
  	return false;
  #endif
  }
  
  bool FileSystem::createDirectory(const char * path)
  {
  #if NV_OS_WIN32 || NV_OS_XBOX
      return CreateDirectoryA(path, NULL) != 0;
  #else
      return mkdir(path, 0777) != -1;
  #endif
  }
  
  bool FileSystem::changeDirectory(const char * path)
  {
  #if NV_OS_WIN32
      return _chdir(path) != -1;
  #elif NV_OS_XBOX
  	// Xbox doesn't support Current Working Directory!
  	return false;
  #else
      return chdir(path) != -1;
  #endif
  }
  
  bool FileSystem::removeFile(const char * path)
  {
      // @@ Use unlink or remove?
      return remove(path) == 0;
  }
  