+char *getSetupFilename()
+{
+ static char *filename = NULL;
+
+ if (filename != NULL)
+ free(filename);
+
+ filename = getPath2(getSetupDir(), SETUP_FILENAME);
+
+ return filename;
+}
+
+static char *getCorrectedImageBasename(char *basename)
+{
+ char *basename_corrected = basename;
+
+#if defined(PLATFORM_MSDOS)
+ if (program.filename_prefix != NULL)
+ {
+ int prefix_len = strlen(program.filename_prefix);
+
+ if (strncmp(basename, program.filename_prefix, prefix_len) == 0)
+ basename_corrected = &basename[prefix_len];
+
+ /* if corrected filename is still longer than standard MS-DOS filename
+ size (8 characters + 1 dot + 3 characters file extension), shorten
+ filename by writing file extension after 8th basename character */
+ if (strlen(basename_corrected) > 8+1+3)
+ {
+ static char *msdos_filename = NULL;
+
+ if (msdos_filename != NULL)
+ free(msdos_filename);
+
+ msdos_filename = getStringCopy(basename_corrected);
+ strncpy(&msdos_filename[8], &basename[strlen(basename) - 1+3], 1+3 + 1);
+ }
+ }
+#endif
+
+ return basename_corrected;
+}
+
+static boolean fileExists(char *filename)
+{
+#if 0
+ printf("checking file '%s'\n", filename);
+#endif
+
+ return (access(filename, F_OK) == 0);
+}
+
+char *getCustomImageFilename(char *basename)
+{
+ static char *filename = NULL;
+
+ if (filename != NULL)
+ free(filename);
+
+ basename = getCorrectedImageBasename(basename);
+
+ if (!setup.override_level_graphics)
+ {
+ /* 1st try: look for special artwork configured in level series config */
+ filename = getPath2(getLevelArtworkDir(TREE_TYPE_GRAPHICS_DIR), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 2nd try: look for special artwork in current level series directory */
+ filename = getPath3(getCurrentLevelDir(), GRAPHICS_DIRECTORY, basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+ }
+
+ /* 3rd try: look for special artwork in configured artwork directory */
+ filename = getPath2(getSetupArtworkDir(artwork.gfx_current), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 4th try: look for default artwork in new default artwork directory */
+ filename = getPath2(getDefaultGraphicsDir(GRAPHICS_SUBDIR), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 5th try: look for default artwork in old default artwork directory */
+ filename = getPath2(options.graphics_directory, basename);
+ if (fileExists(filename))
+ return filename;
+
+ return NULL; /* cannot find specified artwork file anywhere */
+}
+
+char *getCustomSoundFilename(char *basename)
+{
+ static char *filename = NULL;
+
+ if (filename != NULL)
+ free(filename);
+
+ if (!setup.override_level_sounds)
+ {
+ /* 1st try: look for special artwork configured in level series config */
+ filename = getPath2(getLevelArtworkDir(TREE_TYPE_SOUNDS_DIR), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 2nd try: look for special artwork in current level series directory */
+ filename = getPath3(getCurrentLevelDir(), SOUNDS_DIRECTORY, basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+ }
+
+ /* 3rd try: look for special artwork in configured artwork directory */
+ filename = getPath2(getSetupArtworkDir(artwork.snd_current), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 4th try: look for default artwork in new default artwork directory */
+ filename = getPath2(getDefaultSoundsDir(SOUNDS_SUBDIR), basename);
+ if (fileExists(filename))
+ return filename;
+
+ free(filename);
+
+ /* 5th try: look for default artwork in old default artwork directory */
+ filename = getPath2(options.sounds_directory, basename);
+ if (fileExists(filename))
+ return filename;
+
+ return NULL; /* cannot find specified artwork file anywhere */
+}
+
+char *getCustomArtworkFilename(char *basename, int type)
+{
+ if (type == ARTWORK_TYPE_GRAPHICS)
+ return getCustomImageFilename(basename);
+ else if (type == ARTWORK_TYPE_SOUNDS)
+ return getCustomSoundFilename(basename);
+ else
+ return UNDEFINED_FILENAME;
+}
+
+char *getCustomArtworkConfigFilename(int type)
+{
+ return getCustomArtworkFilename(ARTWORKINFO_FILENAME(type), type);
+}
+
+char *getCustomMusicDirectory(void)
+{
+ static char *directory = NULL;
+
+ if (directory != NULL)
+ free(directory);
+
+ if (!setup.override_level_music)
+ {
+ /* 1st try: look for special artwork configured in level series config */
+ directory = getStringCopy(getLevelArtworkDir(TREE_TYPE_MUSIC_DIR));
+ if (fileExists(directory))
+ return directory;
+
+ free(directory);
+
+ /* 2nd try: look for special artwork in current level series directory */
+ directory = getPath2(getCurrentLevelDir(), MUSIC_DIRECTORY);
+ if (fileExists(directory))
+ return directory;
+
+ free(directory);
+ }
+
+ /* 3rd try: look for special artwork in configured artwork directory */
+ directory = getStringCopy(getSetupArtworkDir(artwork.mus_current));
+ if (fileExists(directory))
+ return directory;
+
+ free(directory);
+
+ /* 4th try: look for default artwork in new default artwork directory */
+ directory = getStringCopy(getDefaultMusicDir(MUSIC_SUBDIR));
+ if (fileExists(directory))
+ return directory;
+
+ free(directory);
+
+ /* 5th try: look for default artwork in old default artwork directory */
+ directory = getStringCopy(options.music_directory);
+ if (fileExists(directory))
+ return directory;
+
+ return NULL; /* cannot find specified artwork file anywhere */
+}
+