* This list uses an obstack and a free-list to efficiently manage its
* elements.
* @author Kimon Hoffmann
- * @date 14.07.2005
+ * @date 14.07.2005
+ * @cvs-id $Id$
* @note Until now the code is entirely untested so it probably contains
* plenty of errors.
*/
#include <stddef.h>
#include "obst.h"
-typedef struct PListElement PListElement;
-typedef struct PList PList;
+typedef struct _plist_element plist_element_t;
+typedef struct _plist plist_t;
/**
- * The Plist data type.
+ * The plist data type.
*/
-struct PList {
+struct _plist {
/**
* The obstack used for all allocations.
*/
- struct obstack obst;
+ struct obstack *obst;
+
+ /* Set to 1 if plist uses a foreign obstack */
+ unsigned foreign_obstack : 1;
+
/**
* First element in the list.
*/
- PListElement* firstElement;
+ plist_element_t *first_element;
+
/**
* Last element in the list.
*/
- PListElement* lastElement;
+ plist_element_t *last_element;
+
/**
* Current number of elements in the list.
*/
- int elementCount;
+ int element_count;
+
/**
* First element in the free list.
* Please note that the free list is a single linked list and all back
* references are invalid.
*/
- PListElement* firstFreeElement;
+ plist_element_t* first_free_element;
};
/**
* An element in the pointer list.
*/
-struct PListElement {
- PListElement* next;
- PListElement* prev;
- void* data;
+struct _plist_element {
+ plist_element_t *next;
+ plist_element_t *prev;
+ void *data;
};
/**
* Creates a new pointer list and initializes it.
* @return The newly created pointer list.
*/
-PList* plist_new(void);
+plist_t *plist_new(void);
+
+/**
+ * Creates a new pointer list and initializes it.
+ * Uses the given obstack instead of creating one.
+ * @param obst The obstack to use
+ * @return The newly created pointer list.
+ */
+plist_t *plist_obstack_new(struct obstack *obst);
/**
* Frees the passed pointer list.
* After a call to this function all references to the list and any of
* its elements are invalid.
*/
-void plist_free(PList* list);
+void plist_free(plist_t *list);
/**
* Returns the number of elements in a pointer list.
* @return The number of elements in a pointer list.
*/
#define plist_count(list) \
- ((list)->elementCount)
+ ((list)->element_count)
/**
* Inserts an element at the back of a pointer list.
* @param list the pointer list to append the new element to.
* @param value the element value to append.
*/
-void plist_insert_back(PList* list, void* value);
+void plist_insert_back(plist_t *list, void *value);
/**
* Inserts an element at the front of a pointer list.
* @param list the pointer list to prepend the new element to.
* @param value the element value to prepend.
*/
-void plist_insert_front(PList* list, void* value);
+void plist_insert_front(plist_t *list, void *value);
/**
* Inserts an element into a pointer list before the specified element,
* be inserted. This element must be a part of @p list.
* @param value the element value to insert.
*/
-void plist_insert_before(PList* list, PListElement* element, void* value);
+void plist_insert_before(plist_t *list, plist_element_t *element, void *value);
/**
* Inserts an element into a pointer list after the specified element,
* be inserted. This element must be a part of @p list.
* @param value the element value to insert.
*/
-void plist_insert_after(PList* list, PListElement* element, void* value);
+void plist_insert_after(plist_t *list, plist_element_t *element, void *value);
+
+/**
+ * Checks if list has an element with the given data pointer.
+ * @param list the list to check
+ * @param value the data pointer to look for
+ * @return 1 if element with data pointer found, 0 otherwise
+ */
+int plist_has_value(plist_t *list, void *value);
+
+/**
+ * Tries to find list element associated to the given data pointer.
+ * @param list the list to check
+ * @param value the data pointer to look for
+ * @return The first list element associated to data pointer if found, NULL otherwise
+ */
+plist_element_t *plist_find_value(plist_t *list, void *value);
/**
* Erases the specified element from the pointer list.
- * @param list the pointer list from which the lement should be erased.
+ * @param list the pointer list from which the element should be erased.
* @param element the list element to erase. This element must be a part
* of @p list.
*/
-void plist_erase(PList* list, PListElement* element);
+void plist_erase(plist_t *list, plist_element_t *element);
/**
* Erases all elements from the specified pointer list.
- * @param list the pointer list that should be cleard.
+ * @param list the pointer list that should be cleared.
*/
-void plist_clear(PList* list);
+void plist_clear(plist_t *list);
/**
* Returns the first element of a pointer list.
* @return a pointer to the element or NULL if the list is empty
*/
#define plist_first(list) \
- ((list)->firstElement)
+ ((list)->first_element)
/**
* Returns the last element of a pointer list.
* @return a pointer to the element or NULL if the list is empty
*/
#define plist_last(list) \
- ((list)->lastElement)
+ ((list)->last_element)
/**
* Checks whether a pointer list element has a successor or not.
- * @param element the list element that should be queried for existance
+ * @param element the list element that should be queried for existence
* of a successor.
* @return TRUE if @p element has a successor, otherwise FALSE.
*/
/**
* Checks whether a pointer list element has a predecessor or not.
- * @param element the list element that should be queried for existance
+ * @param element the list element that should be queried for existence
* of a predecessor.
* @return TRUE if @p element has a successor, otherwise FALSE.
*/
#define plist_element_get_value(element) \
((element)->data)
+/**
+ * Convenience macro to iterate over a plist.
+ */
+#define foreach_plist(list, el) \
+ for (el = plist_first(list); el; el = plist_element_get_next(el))
+
#endif /*_PLIST_H_*/
projects / libfirm / blobdiff