Added a space on --version.
[supertux.git] / lib / app / setup.cpp
index 2daf4d9..ca667bb 100644 (file)
@@ -42,7 +42,6 @@
 #include <cctype>
 
 #include "../app/globals.h"
-#include "../app/defines.h"
 #include "../app/setup.h"
 #include "../video/screen.h"
 #include "../video/surface.h"
@@ -60,21 +59,16 @@ using namespace SuperTux;
 #define DATA_PREFIX "./data/"
 #endif
 
-/* Screen proprities: */
-/* Don't use this to test for the actual screen sizes. Use screen->w/h instead! */
-#define SCREEN_W 800
-#define SCREEN_H 600
-
 /* Local function prototypes: */
 
 void seticon(void);
 void usage(char * prog, int ret);
 
 /* Does the given file exist and is it accessible? */
-int SuperTux::faccessible(const char *filename)
+int FileSystem::faccessible(const std::string& filename)
 {
   struct stat filestat;
-  if (stat(filename, &filestat) == -1)
+  if (stat(filename.c_str(), &filestat) == -1)
     {
       return false;
     }
@@ -88,10 +82,10 @@ int SuperTux::faccessible(const char *filename)
 }
 
 /* Can we write to this location? */
-int SuperTux::fwriteable(const char *filename)
+int FileSystem::fwriteable(const std::string& filename)
 {
   FILE* fi;
-  fi = fopen(filename, "wa");
+  fi = fopen(filename.c_str(), "wa");
   if (fi == NULL)
     {
       return false;
@@ -100,14 +94,13 @@ int SuperTux::fwriteable(const char *filename)
 }
 
 /* Makes sure a directory is created in either the SuperTux home directory or the SuperTux base directory.*/
-int SuperTux::fcreatedir(const char* relative_dir)
+int FileSystem::fcreatedir(const std::string& relative_dir)
 {
-  char path[1024];
-  snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
-  if(mkdir(path,0755) != 0)
+  std::string path = st_dir + "/" + relative_dir + "/";
+  if(mkdir(path.c_str(),0755) != 0)
     {
-      snprintf(path, 1024, "%s/%s/", datadir.c_str(), relative_dir);
-      if(mkdir(path,0755) != 0)
+      path = datadir + "/" + relative_dir + "/";
+      if(mkdir(path.c_str(),0755) != 0)
         {
           return false;
         }
@@ -122,101 +115,69 @@ int SuperTux::fcreatedir(const char* relative_dir)
     }
 }
 
-FILE * SuperTux::opendata(const char * rel_filename, const char * mode)
-{
-  char * filename = NULL;
-  FILE * fi;
-
-  filename = (char *) malloc(sizeof(char) * (strlen(st_dir) +
-                                             strlen(rel_filename) + 1));
-
-  strcpy(filename, st_dir);
-  /* Open the high score file: */
-
-  strcat(filename, rel_filename);
-
-  /* Try opening the file: */
-  fi = fopen(filename, mode);
-
-  if (fi == NULL)
-    {
-      fprintf(stderr, "Warning: Unable to open the file \"%s\" ", filename);
-
-      if (strcmp(mode, "r") == 0)
-        fprintf(stderr, "for read!!!\n");
-      else if (strcmp(mode, "w") == 0)
-        fprintf(stderr, "for write!!!\n");
-    }
-  free( filename );
-
-  return(fi);
-}
-
 /* Get all names of sub-directories in a certain directory. */
 /* Returns the number of sub-directories found. */
 /* Note: The user has to free the allocated space. */
-string_list_type SuperTux::dsubdirs(const char *rel_path,const  char* expected_file)
+std::set<std::string> FileSystem::dsubdirs(const std::string &rel_path,const  std::string& expected_file)
 {
   DIR *dirStructP;
   struct dirent *direntp;
-  string_list_type sdirs;
-  char filename[1024];
-  char path[1024];
+  std::set<std::string> sdirs;
+  std::string filename;
+  std::string path = st_dir + "/" + rel_path;
 
-  string_list_init(&sdirs);
-  sprintf(path,"%s/%s",st_dir,rel_path);
-  if((dirStructP = opendir(path)) != NULL)
+  if((dirStructP = opendir(path.c_str())) != NULL)
     {
       while((direntp = readdir(dirStructP)) != NULL)
         {
-          char absolute_filename[1024];
+          std::string absolute_filename;
           struct stat buf;
 
-          sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
+          absolute_filename = path + "/" + direntp->d_name;
 
-          if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
+          if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISDIR(buf.st_mode))
             {
-              if(expected_file != NULL)
+              if(!expected_file.empty())
                 {
-                  sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
+                  filename = path + "/" + direntp->d_name + "/" + expected_file;
                   if(!faccessible(filename))
                     continue;
                 }
 
-              string_list_add_item(&sdirs,direntp->d_name);
+             sdirs.insert(direntp->d_name);
             }
         }
       closedir(dirStructP);
     }
 
-  sprintf(path,"%s/%s",datadir.c_str(),rel_path);
-  if((dirStructP = opendir(path)) != NULL)
+  path = datadir + "/" + rel_path;
+  if((dirStructP = opendir(path.c_str())) != NULL)
     {
       while((direntp = readdir(dirStructP)) != NULL)
         {
-          char absolute_filename[1024];
+          std::string absolute_filename;
           struct stat buf;
 
-          sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
+          absolute_filename = path + "/" + direntp->d_name;
 
-          if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
+          if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISDIR(buf.st_mode))
             {
-              if(expected_file != NULL)
+              if(!expected_file.empty())
                 {
-                  sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
-                  if(!faccessible(filename))
+                  filename = path + "/" + direntp->d_name + "/" + expected_file;
+                  if(!faccessible(filename.c_str()))
                     {
                       continue;
                     }
                   else
                     {
-                      sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
-                      if(faccessible(filename))
+                      filename = st_dir + "/" + rel_path + "/" + direntp->d_name + "/" + expected_file;
+                      if(faccessible(filename.c_str()))
                         continue;
                     }
                 }
 
-              string_list_add_item(&sdirs,direntp->d_name);
+             sdirs.insert(direntp->d_name);
             }
         }
       closedir(dirStructP);
@@ -225,63 +186,61 @@ string_list_type SuperTux::dsubdirs(const char *rel_path,const  char* expected_f
   return sdirs;
 }
 
-string_list_type SuperTux::dfiles(const char *rel_path, const  char* glob, const  char* exception_str)
+std::set<std::string> FileSystem::dfiles(const std::string& rel_path, const  std::string& glob, const  std::string& exception_str)
 {
   DIR *dirStructP;
   struct dirent *direntp;
-  string_list_type sdirs;
-  char path[1024];
+  std::set<std::string> sdirs;
+  std::string path = st_dir + "/" + rel_path;
 
-  string_list_init(&sdirs);
-  sprintf(path,"%s/%s",st_dir,rel_path);
-  if((dirStructP = opendir(path)) != NULL)
+  if((dirStructP = opendir(path.c_str())) != NULL)
     {
       while((direntp = readdir(dirStructP)) != NULL)
         {
-          char absolute_filename[1024];
+          std::string absolute_filename;
           struct stat buf;
 
-          sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
+          absolute_filename = path + "/" + direntp->d_name;
 
-          if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
+          if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISREG(buf.st_mode))
             {
-              if(exception_str != NULL)
+              if(!exception_str.empty())
                 {
-                  if(strstr(direntp->d_name,exception_str) != NULL)
+                  if(strstr(direntp->d_name,exception_str.c_str()) != NULL)
                     continue;
                 }
-              if(glob != NULL)
-                if(strstr(direntp->d_name,glob) == NULL)
+              if(!glob.empty())
+                if(strstr(direntp->d_name,glob.c_str()) == NULL)
                   continue;
 
-              string_list_add_item(&sdirs,direntp->d_name);
+             sdirs.insert(direntp->d_name);
             }
         }
       closedir(dirStructP);
     }
 
-  sprintf(path,"%s/%s",datadir.c_str(),rel_path);
-  if((dirStructP = opendir(path)) != NULL)
+  path = datadir + "/" + rel_path;
+  if((dirStructP = opendir(path.c_str())) != NULL)
     {
       while((direntp = readdir(dirStructP)) != NULL)
         {
-          char absolute_filename[1024];
+          std::string absolute_filename;
           struct stat buf;
 
-          sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
+          absolute_filename = path + "/" + direntp->d_name;
 
-          if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
+          if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISREG(buf.st_mode))
             {
-              if(exception_str != NULL)
+              if(!exception_str.empty())
                 {
-                  if(strstr(direntp->d_name,exception_str) != NULL)
+                  if(strstr(direntp->d_name,exception_str.c_str()) != NULL)
                     continue;
                 }
-              if(glob != NULL)
-                if(strstr(direntp->d_name,glob) == NULL)
+              if(!glob.empty())
+                if(strstr(direntp->d_name,glob.c_str()) == NULL)
                   continue;
 
-              string_list_add_item(&sdirs,direntp->d_name);
+             sdirs.insert(direntp->d_name);
             }
         }
       closedir(dirStructP);
@@ -290,19 +249,18 @@ string_list_type SuperTux::dfiles(const char *rel_path, const  char* glob, const
   return sdirs;
 }
 
-void SuperTux::free_strings(char **strings, int num)
+void Setup::info(const std::string& _package_name, const std::string& _package_symbol_name, const std::string& _package_version)
 {
-  int i;
-  for(i=0; i < num; ++i)
-    free(strings[i]);
+package_name = _package_name;
+package_symbol_name = _package_symbol_name;
+package_version = _package_version;
 }
 
 /* --- SETUP --- */
 /* Set SuperTux configuration and save directories */
-void SuperTux::st_directory_setup(void)
+void Setup::directories(void)
 {
-  char *home;
-  char str[1024];
+  std::string home;
   /* Get home directory (from $HOME variable)... if we can't determine it,
      use the current directory ("."): */
   if (getenv("HOME") != NULL)
@@ -310,29 +268,21 @@ void SuperTux::st_directory_setup(void)
   else
     home = ".";
 
-  st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
-                                           strlen("/.supertux") + 1));
-  strcpy(st_dir, home);
-  strcat(st_dir, "/.supertux");
+  st_dir = home + "/." + package_symbol_name;
 
   /* Remove .supertux config-file from old SuperTux versions */
-  if(faccessible(st_dir))
+  if(FileSystem::faccessible(st_dir))
     {
-      remove
-        (st_dir);
+      remove(st_dir.c_str());
     }
 
-  st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
-
-  strcpy(st_save_dir,st_dir);
-  strcat(st_save_dir,"/save");
+  st_save_dir = st_dir + "/save";
 
   /* Create them. In the case they exist they won't destroy anything. */
-  mkdir(st_dir, 0755);
-  mkdir(st_save_dir, 0755);
+  mkdir(st_dir.c_str(), 0755);
+  mkdir(st_save_dir.c_str(), 0755);
 
-  sprintf(str, "%s/levels", st_dir);
-  mkdir(str, 0755);
+  mkdir((st_dir + "/levels").c_str(), 0755);
 
   // User has not that a datadir, so we try some magic
   if (datadir.empty())
@@ -347,16 +297,21 @@ void SuperTux::st_directory_setup(void)
         }
       else
         {
-          std::string exedir = std::string(dirname(exe_file)) + "/";
-          
+         std::string exedir = std::string(dirname(exe_file)) + "/";
+         
           datadir = exedir + "../data"; // SuperTux run from source dir
           if (access(datadir.c_str(), F_OK) != 0)
             {
-              datadir = exedir + "../share/supertux"; // SuperTux run from PATH
+             datadir = exedir + "../../data";  //SuperTux run from source dir (with libtool script)
+             
+             if (access(datadir.c_str(), F_OK) != 0)
+             {
+              datadir = exedir + "../share/" + package_symbol_name; // SuperTux run from PATH
               if (access(datadir.c_str(), F_OK) != 0) 
                 { // If all fails, fall back to compiled path
                   datadir = DATA_PREFIX; 
                 }
+             }
             }
         }
 #else
@@ -366,7 +321,7 @@ void SuperTux::st_directory_setup(void)
   printf("Datadir: %s\n", datadir.c_str());
 }
 
-void SuperTux::st_general_setup(void)
+void Setup::general(void)
 {
   /* Seed random number generator: */
 
@@ -380,20 +335,6 @@ void SuperTux::st_general_setup(void)
 
   SDL_EnableUNICODE(1);
 
-  /* Load global images: */
-  gold_text = new Font(datadir + "/images/fonts/gold.png", Font::TEXT, 16,18);
-  blue_text = new Font(datadir + "/images/fonts/blue.png", Font::TEXT, 16,18,3);
-  white_text  = new Font(datadir + "/images/fonts/white.png",
-      Font::TEXT, 16,18);
-  gray_text  = new Font(datadir + "/images/fonts/gray.png",
-      Font::TEXT, 16,18);
-  white_small_text = new Font(datadir + "/images/fonts/white-small.png",
-          Font::TEXT, 8,9, 1);
-  white_big_text   = new Font(datadir + "/images/fonts/white-big.png",
-      Font::TEXT, 20,22, 3);
-  yellow_nums = new Font(datadir + "/images/fonts/numbers.png",
-      Font::NUM, 32,32);
-
   /* Load GUI/menu images: */
   checkbox = new Surface(datadir + "/images/status/checkbox.png", true);
   checkbox_checked = new Surface(datadir + "/images/status/checkbox-checked.png", true);
@@ -407,18 +348,9 @@ void SuperTux::st_general_setup(void)
   
 }
 
-void SuperTux::st_general_free(void)
+void Setup::general_free(void)
 {
 
-  /* Free global images: */
-  delete gold_text;
-  delete white_text;
-  delete blue_text;
-  delete gray_text;
-  delete white_small_text;
-  delete white_big_text;
-  delete yellow_nums;
-
   /* Free GUI/menu images: */
   delete checkbox;
   delete checkbox_checked;
@@ -431,7 +363,7 @@ void SuperTux::st_general_free(void)
   
 }
 
-void SuperTux::st_video_setup(void)
+void Setup::video(unsigned int screen_w, unsigned int screen_h)
 {
   /* Init SDL Video: */
   if (SDL_Init(SDL_INIT_VIDEO) < 0)
@@ -445,21 +377,21 @@ void SuperTux::st_video_setup(void)
 
   /* Open display: */
   if(use_gl)
-    st_video_setup_gl();
+    video_gl(screen_w, screen_h);
   else
-    st_video_setup_sdl();
+    video_sdl(screen_w, screen_h);
 
   Surface::reload_all();
 
   /* Set window manager stuff: */
-  SDL_WM_SetCaption("SuperTux " VERSION, "SuperTux");
+  SDL_WM_SetCaption((package_name + " " + package_version).c_str(), package_name.c_str());
 }
 
-void SuperTux::st_video_setup_sdl(void)
+void Setup::video_sdl(unsigned int screen_w, unsigned int screen_h)
 {
   if (use_fullscreen)
     {
-      screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
+      screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
       if (screen == NULL)
         {
           fprintf(stderr,
@@ -472,7 +404,7 @@ void SuperTux::st_video_setup_sdl(void)
     }
   else
     {
-      screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
+      screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 
       if (screen == NULL)
         {
@@ -485,7 +417,7 @@ void SuperTux::st_video_setup_sdl(void)
     }
 }
 
-void SuperTux::st_video_setup_gl(void)
+void Setup::video_gl(unsigned int screen_w, unsigned int screen_h)
 {
 #ifndef NOOPENGL
 
@@ -497,7 +429,7 @@ void SuperTux::st_video_setup_gl(void)
 
   if (use_fullscreen)
     {
-      screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
+      screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
       if (screen == NULL)
         {
           fprintf(stderr,
@@ -510,7 +442,7 @@ void SuperTux::st_video_setup_gl(void)
     }
   else
     {
-      screen = SDL_SetVideoMode(SCREEN_W, SCREEN_H, 0, SDL_OPENGL);
+      screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_OPENGL);
 
       if (screen == NULL)
         {
@@ -541,7 +473,7 @@ void SuperTux::st_video_setup_gl(void)
 
 }
 
-void SuperTux::st_joystick_setup(void)
+void Setup::joystick(void)
 {
 
   /* Init Joystick: */
@@ -602,19 +534,19 @@ void SuperTux::st_joystick_setup(void)
     }
 }
 
-void SuperTux::st_audio_setup(void)
+void Setup::audio(void)
 {
 
   /* Init SDL Audio silently even if --disable-sound : */
 
-  if (audio_device)
+  if (SoundManager::get()->audio_device_available())
     {
       if (SDL_Init(SDL_INIT_AUDIO) < 0)
         {
           /* only print out message if sound or music
              was not disabled at command-line
            */
-          if (use_sound || use_music)
+          if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
             {
               fprintf(stderr,
                       "\nWarning: I could not initialize audio!\n"
@@ -625,23 +557,23 @@ void SuperTux::st_audio_setup(void)
              because in this case, use_sound & use_music' values are ignored
              when there's no available audio device
           */
-          use_sound = false;
-          use_music = false;
-          audio_device = false;
+          SoundManager::get()->enable_sound(false);
+          SoundManager::get()->enable_music(false);
+          SoundManager::get()->set_audio_device_available(false);
         }
     }
 
 
   /* Open sound silently regarless the value of "use_sound": */
 
-  if (audio_device)
+  if (SoundManager::get()->audio_device_available())
     {
-      if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
+      if (SoundManager::get()->open_audio(44100, AUDIO_S16, 2, 2048) < 0)
         {
           /* only print out message if sound or music
              was not disabled at command-line
            */
-          if (use_sound || use_music)
+          if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
             {
               fprintf(stderr,
                       "\nWarning: I could not set up audio for 44100 Hz "
@@ -649,9 +581,9 @@ void SuperTux::st_audio_setup(void)
                       "The Simple DirectMedia error that occured was:\n"
                       "%s\n\n", SDL_GetError());
             }
-          use_sound = false;
-          use_music = false;
-          audio_device = false;
+          SoundManager::get()->enable_sound(false);
+          SoundManager::get()->enable_music(false);
+          SoundManager::get()->set_audio_device_available(false);
         }
     }
 
@@ -660,20 +592,20 @@ void SuperTux::st_audio_setup(void)
 
 /* --- SHUTDOWN --- */
 
-void SuperTux::st_shutdown(void)
+void Termination::shutdown(void)
 {
-  close_audio();
-  SDL_Quit();
   config->save();
+  SoundManager::get()->close_audio();
+  SDL_Quit();
 }
 
 /* --- ABORT! --- */
 
-void SuperTux::st_abort(const std::string& reason, const std::string& details)
+void Termination::abort(const std::string& reason, const std::string& details)
 {
   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
-  st_shutdown();
-  abort();
+  shutdown();
+  ::abort();
 }
 
 /* Set Icon (private) */
@@ -687,13 +619,13 @@ void seticon(void)
 
   /* Load icon into a surface: */
 
-  icon = IMG_Load((datadir + "/images/supertux.xpm").c_str());
+  icon = IMG_Load((datadir + "/images/" + package_symbol_name + ".xpm").c_str());
   if (icon == NULL)
     {
       fprintf(stderr,
               "\nError: I could not load the icon image: %s%s\n"
               "The Simple DirectMedia error that occured was:\n"
-              "%s\n\n", datadir.c_str(), "/images/supertux.xpm", SDL_GetError());
+              "%s\n\n", datadir.c_str(), ("/images/" + package_symbol_name + ".xpm").c_str(), SDL_GetError());
       exit(1);
     }
 
@@ -719,7 +651,7 @@ void seticon(void)
 
 /* Parse command-line arguments: */
 
-void SuperTux::parseargs(int argc, char * argv[])
+void Setup::parseargs(int argc, char * argv[])
 {
   int i;
 
@@ -775,6 +707,10 @@ void SuperTux::parseargs(int argc, char * argv[])
         {
           launch_worldmap_mode = true;
         }
+      else if (strcmp(argv[i], "--flip-levels") == 0)
+        {
+          flip_levels_mode = true;
+        }
       else if (strcmp(argv[i], "--datadir") == 0 
                || strcmp(argv[i], "-d") == 0 )
         {
@@ -809,21 +745,20 @@ void SuperTux::parseargs(int argc, char * argv[])
       else if (strcmp(argv[i], "--version") == 0)
         {
           /* Show version: */
-          printf("SuperTux " VERSION "\n");
+          printf((package_name + " " + package_version + "\n").c_str() );
           exit(0);
         }
       else if (strcmp(argv[i], "--disable-sound") == 0)
         {
           /* Disable the compiled in sound feature */
           printf("Sounds disabled \n");
-          use_sound = false;
-          audio_device = false;
+          SoundManager::get()->enable_sound(false); 
         }
       else if (strcmp(argv[i], "--disable-music") == 0)
         {
           /* Disable the compiled in sound feature */
           printf("Music disabled \n");
-          use_music = false;
+          SoundManager::get()->enable_music(false); 
         }
       else if (strcmp(argv[i], "--debug") == 0)
         {
@@ -833,8 +768,8 @@ void SuperTux::parseargs(int argc, char * argv[])
         }
       else if (strcmp(argv[i], "--help") == 0)
         {     /* Show help: */
-          puts(_("  SuperTux  " VERSION "\n"
-               "  Please see the file \"README.txt\" for more details.\n"));
+          puts(_(("  SuperTux  " + package_version + "\n"
+               "  Please see the file \"README.txt\" for more details.\n").c_str()));
           printf(_("Usage: %s [OPTIONS] FILENAME\n\n"), argv[0]);
           puts(_("Display Options:\n"
                "  -f, --fullscreen    Run in fullscreen mode.\n"
@@ -854,6 +789,7 @@ void SuperTux::parseargs(int argc, char * argv[])
                "                      Define how joystick buttons and axis should be mapped\n"
                "  --leveleditor       Opens the leveleditor in a file.\n"
                "  --worldmap          Opens the specified worldmap file.\n"
+               "  --flip-levels       Flip levels upside-down.\n"
                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
                "  --debug             Enables the debug mode, which is useful for developers.\n"
                "  --help              Display a help message summarizing command-line\n"
@@ -894,7 +830,7 @@ void usage(char * prog, int ret)
 
   /* Display the usage message: */
 
-  fprintf(fi, _("Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug] | [--usage | --help | --version] [--leveleditor] [--worldmap] FILENAME\n"),
+  fprintf(fi, _("Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug] | [--usage | --help | --version] [--leveleditor] [--worldmap] [--flip-levels] FILENAME\n"),
           prog);
 
 
@@ -903,9 +839,9 @@ void usage(char * prog, int ret)
   exit(ret);
 }
 
-std::vector<std::string> SuperTux::read_directory(const std::string& pathname)
+std::set<std::string> FileSystem::read_directory(const std::string& pathname)
 {
-  std::vector<std::string> dirnames;
+  std::set<std::string> dirnames;
   
   DIR* dir = opendir(pathname.c_str());
   if (dir)
@@ -914,7 +850,7 @@ std::vector<std::string> SuperTux::read_directory(const std::string& pathname)
       
       while((direntp = readdir(dir)))
         {
-          dirnames.push_back(direntp->d_name);
+          dirnames.insert(direntp->d_name);
         }
       
       closedir(dir);