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Diffstat (limited to '')
| -rw-r--r-- | src/list.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/list.h b/src/list.h new file mode 100644 index 000000000..8a38ba4fe --- /dev/null +++ b/src/list.h @@ -0,0 +1,99 @@ +/* the Music Player Daemon (MPD) + * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu) + * This project's homepage is: http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#ifndef LIST_H +#define LIST_H + +#include <stdlib.h> + +/* used to make a list where free() will be used to free data in list */ +#define DEFAULT_FREE_DATA_FUNC free + +/* typedef for function to free data stored in the list nodes */ +typedef void ListFreeDataFunc(void *); + +typedef struct _ListNode { + /* used to identify node (ie. when using findInList) */ + char * key; + /* data store in node */ + void * data; + /* next node in list */ + struct _ListNode * nextNode; + /* previous node in list */ + struct _ListNode * prevNode; +} ListNode; + +typedef struct _List { + /* first node in list */ + ListNode * firstNode; + /* last node in list */ + ListNode * lastNode; + /* function used to free data stored in nodes of the list */ + ListFreeDataFunc * freeDataFunc; + /* number of nodes */ + long numberOfNodes; + /* array for searching when list is sorted */ + ListNode ** nodesArray; +} List; + +/* allocates memory for a new list and initializes it + * _freeDataFunc_ -> pointer to function used to free data, use + * DEFAULT_FREE_DATAFUNC to use free() + * returns pointer to new list if successful, NULL otherwise + */ +List * makeList(ListFreeDataFunc * freeDataFunc); + +/* inserts a node into _list_ with _key_ and _data_ + * _list_ -> list the data will be inserted in + * _key_ -> identifier for node/data to be inserted into list + * _data_ -> data to be inserted in list + * returns 1 if successful, 0 otherwise + */ +int insertInList(List * list,char * key,void * data); + +int insertInListWithoutKey(List * list,void * data); + +/* deletes the first node in the list with the key _key_ + * _list_ -> list the node will be deleted from + * _key_ -> key used to identify node to delete + * returns 1 if node is found and deleted, 0 otherwise + */ +int deleteFromList(List * list,char * key); + +void deleteNodeFromList(List * list,ListNode * node); + +/* finds data in a list based on key + * _list_ -> list to search for _key_ in + * _key_ -> which node is being searched for + * _data_ -> a pointer to where data will be placed, + * _data_ memory should not by allocated or freed + * returns 1 if successful, 0 otherwise + */ +int findInList(List * list, char * key, void ** data); + +/* frees memory malloc'd for list and its nodes + * _list_ -> List to be free'd + */ +void freeList(void * list); + +void clearList(List * list); + +void sortList(List * list); + +#endif |