- char c;
- int joystick_nr = 0;
-
- if (device_name == NULL || device_name[0] == '\0')
- return 0;
-
- c = device_name[strlen(device_name) - 1];
-
- if (c >= '0' && c <= '9')
- joystick_nr = (int)(c - '0');
-
- if (joystick_nr < 0 || joystick_nr >= MAX_PLAYERS)
- joystick_nr = 0;
-
- return joystick_nr;
-}
-
-/* ------------------------------------------------------------------------- */
-/* some functions to handle lists of level directories */
-/* ------------------------------------------------------------------------- */
-
-struct LevelDirInfo *newLevelDirInfo()
-{
- return checked_calloc(sizeof(struct LevelDirInfo));
-}
-
-void pushLevelDirInfo(struct LevelDirInfo **node_first,
- struct LevelDirInfo *node_new)
-{
- node_new->next = *node_first;
- *node_first = node_new;
-}
-
-int numLevelDirInfo(struct LevelDirInfo *node)
-{
- int num = 0;
-
- while (node)
- {
- num++;
- node = node->next;
- }
-
- return num;
-}
-
-boolean validLevelSeries(struct LevelDirInfo *node)
-{
- return (node != NULL && !node->node_group && !node->parent_link);
-}
-
-struct LevelDirInfo *getFirstValidLevelSeries(struct LevelDirInfo *node)
-{
- if (node == NULL)
- {
- if (leveldir_first) /* start with first level directory entry */
- return getFirstValidLevelSeries(leveldir_first);
- else
- return NULL;
- }
- else if (node->node_group) /* enter level group (step down into tree) */
- return getFirstValidLevelSeries(node->node_group);
- else if (node->parent_link) /* skip start entry of level group */
- {
- if (node->next) /* get first real level series entry */
- return getFirstValidLevelSeries(node->next);
- else /* leave empty level group and go on */
- return getFirstValidLevelSeries(node->node_parent->next);
- }
- else /* this seems to be a regular level series */
- return node;
-}