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-rw-r--r--src/common/tree.h1159
1 files changed, 629 insertions, 530 deletions
diff --git a/src/common/tree.h b/src/common/tree.h
index 4a295f894..3da49e422 100644
--- a/src/common/tree.h
+++ b/src/common/tree.h
@@ -43,533 +43,632 @@
* The maximum height of a red-black tree is 2lg (n+1).
*/
-/* Macros that define a red-black tree */
-#define RB_HEAD(name, type) \
- struct name { \
- struct type* rbh_root; /* root of the tree */ \
- }
-
-#define RB_INITIALIZER(root) \
- { NULL }
-
-#define RB_INIT(root) \
- do { \
- (root)->rbh_root = NULL; \
- } while (/*CONSTCOND*/ 0)
-
-#define RB_BLACK 0
-#define RB_RED 1
-#define RB_ENTRY(type) \
- struct { \
- struct type* rbe_left; /* left element */ \
- struct type* rbe_right; /* right element */ \
- struct type* rbe_parent; /* parent element */ \
- int rbe_color; /* node color */ \
- }
-
-#define RB_LEFT(elm, field) (elm)->field.rbe_left
-#define RB_RIGHT(elm, field) (elm)->field.rbe_right
-#define RB_PARENT(elm, field) (elm)->field.rbe_parent
-#define RB_COLOR(elm, field) (elm)->field.rbe_color
-#define RB_ROOT(head) (head)->rbh_root
-#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
-
-#define RB_SET(elm, parent, field) \
- do { \
- RB_PARENT(elm, field) = parent; \
- RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
- RB_COLOR(elm, field) = RB_RED; \
- } while (/*CONSTCOND*/ 0)
-
-#define RB_SET_BLACKRED(black, red, field) \
- do { \
- RB_COLOR(black, field) = RB_BLACK; \
- RB_COLOR(red, field) = RB_RED; \
- } while (/*CONSTCOND*/ 0)
-
-#ifndef RB_AUGMENT
-#define RB_AUGMENT(x) \
- do { \
- } while (0)
-#endif
-
-#define RB_ROTATE_LEFT(head, elm, tmp, field) \
- do { \
- (tmp) = RB_RIGHT(elm, field); \
- if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
- RB_PARENT(RB_LEFT(tmp, field), field) = (elm); \
- } \
- RB_AUGMENT(elm); \
- if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
- if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
- RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
- else \
- RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
- } else \
- (head)->rbh_root = (tmp); \
- RB_LEFT(tmp, field) = (elm); \
- RB_PARENT(elm, field) = (tmp); \
- RB_AUGMENT(tmp); \
- if ((RB_PARENT(tmp, field))) \
- RB_AUGMENT(RB_PARENT(tmp, field)); \
- } while (/*CONSTCOND*/ 0)
-
-#define RB_ROTATE_RIGHT(head, elm, tmp, field) \
- do { \
- (tmp) = RB_LEFT(elm, field); \
- if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
- RB_PARENT(RB_RIGHT(tmp, field), field) = (elm); \
- } \
- RB_AUGMENT(elm); \
- if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
- if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
- RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
- else \
- RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
- } else \
- (head)->rbh_root = (tmp); \
- RB_RIGHT(tmp, field) = (elm); \
- RB_PARENT(elm, field) = (tmp); \
- RB_AUGMENT(tmp); \
- if ((RB_PARENT(tmp, field))) \
- RB_AUGMENT(RB_PARENT(tmp, field)); \
- } while (/*CONSTCOND*/ 0)
-
-/* Generates prototypes and inline functions */
-#define RB_PROTOTYPE(name, type, field, cmp) RB_PROTOTYPE_INTERNAL(name, type, field, cmp, )
-#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \
- RB_PROTOTYPE_INTERNAL(name, type, field, cmp, static)
-#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
- RB_PROTOTYPE_INSERT_COLOR(name, type, attr); \
- RB_PROTOTYPE_REMOVE_COLOR(name, type, attr); \
- RB_PROTOTYPE_INSERT(name, type, attr); \
- RB_PROTOTYPE_REMOVE(name, type, attr); \
- RB_PROTOTYPE_FIND(name, type, attr); \
- RB_PROTOTYPE_NFIND(name, type, attr); \
- RB_PROTOTYPE_FIND_LIGHT(name, type, attr); \
- RB_PROTOTYPE_NFIND_LIGHT(name, type, attr); \
- RB_PROTOTYPE_NEXT(name, type, attr); \
- RB_PROTOTYPE_PREV(name, type, attr); \
- RB_PROTOTYPE_MINMAX(name, type, attr);
-#define RB_PROTOTYPE_INSERT_COLOR(name, type, attr) \
- attr void name##_RB_INSERT_COLOR(struct name*, struct type*)
-#define RB_PROTOTYPE_REMOVE_COLOR(name, type, attr) \
- attr void name##_RB_REMOVE_COLOR(struct name*, struct type*, struct type*)
-#define RB_PROTOTYPE_REMOVE(name, type, attr) \
- attr struct type* name##_RB_REMOVE(struct name*, struct type*)
-#define RB_PROTOTYPE_INSERT(name, type, attr) \
- attr struct type* name##_RB_INSERT(struct name*, struct type*)
-#define RB_PROTOTYPE_FIND(name, type, attr) \
- attr struct type* name##_RB_FIND(struct name*, struct type*)
-#define RB_PROTOTYPE_NFIND(name, type, attr) \
- attr struct type* name##_RB_NFIND(struct name*, struct type*)
-#define RB_PROTOTYPE_FIND_LIGHT(name, type, attr) \
- attr struct type* name##_RB_FIND_LIGHT(struct name*, const void*)
-#define RB_PROTOTYPE_NFIND_LIGHT(name, type, attr) \
- attr struct type* name##_RB_NFIND_LIGHT(struct name*, const void*)
-#define RB_PROTOTYPE_NEXT(name, type, attr) attr struct type* name##_RB_NEXT(struct type*)
-#define RB_PROTOTYPE_PREV(name, type, attr) attr struct type* name##_RB_PREV(struct type*)
-#define RB_PROTOTYPE_MINMAX(name, type, attr) attr struct type* name##_RB_MINMAX(struct name*, int)
-
-/* Main rb operation.
- * Moves node close to the key of elm to top
- */
-#define RB_GENERATE_WITHOUT_COMPARE(name, type, field) \
- RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, )
-#define RB_GENERATE_WITHOUT_COMPARE_STATIC(name, type, field) \
- RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, static)
-#define RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, attr) \
- RB_GENERATE_REMOVE_COLOR(name, type, field, attr) \
- RB_GENERATE_REMOVE(name, type, field, attr) \
- RB_GENERATE_NEXT(name, type, field, attr) \
- RB_GENERATE_PREV(name, type, field, attr) \
- RB_GENERATE_MINMAX(name, type, field, attr)
-
-#define RB_GENERATE_WITH_COMPARE(name, type, field, cmp, lcmp) \
- RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, )
-#define RB_GENERATE_WITH_COMPARE_STATIC(name, type, field, cmp, lcmp) \
- RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, static)
-#define RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, lcmp, attr) \
- RB_GENERATE_INSERT_COLOR(name, type, field, attr) \
- RB_GENERATE_INSERT(name, type, field, cmp, attr) \
- RB_GENERATE_FIND(name, type, field, cmp, attr) \
- RB_GENERATE_NFIND(name, type, field, cmp, attr) \
- RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr) \
- RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr)
-
-#define RB_GENERATE_ALL(name, type, field, cmp) RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, )
-#define RB_GENERATE_ALL_STATIC(name, type, field, cmp) \
- RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, static)
-#define RB_GENERATE_ALL_INTERNAL(name, type, field, cmp, attr) \
- RB_GENERATE_WITHOUT_COMPARE_INTERNAL(name, type, field, attr) \
- RB_GENERATE_WITH_COMPARE_INTERNAL(name, type, field, cmp, attr)
-
-#define RB_GENERATE_INSERT_COLOR(name, type, field, attr) \
- attr void name##_RB_INSERT_COLOR(struct name* head, struct type* elm) { \
- struct type *parent, *gparent, *tmp; \
- while ((parent = RB_PARENT(elm, field)) != NULL && RB_COLOR(parent, field) == RB_RED) { \
- gparent = RB_PARENT(parent, field); \
- if (parent == RB_LEFT(gparent, field)) { \
- tmp = RB_RIGHT(gparent, field); \
- if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
- RB_COLOR(tmp, field) = RB_BLACK; \
- RB_SET_BLACKRED(parent, gparent, field); \
- elm = gparent; \
- continue; \
- } \
- if (RB_RIGHT(parent, field) == elm) { \
- RB_ROTATE_LEFT(head, parent, tmp, field); \
- tmp = parent; \
- parent = elm; \
- elm = tmp; \
- } \
- RB_SET_BLACKRED(parent, gparent, field); \
- RB_ROTATE_RIGHT(head, gparent, tmp, field); \
- } else { \
- tmp = RB_LEFT(gparent, field); \
- if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
- RB_COLOR(tmp, field) = RB_BLACK; \
- RB_SET_BLACKRED(parent, gparent, field); \
- elm = gparent; \
- continue; \
- } \
- if (RB_LEFT(parent, field) == elm) { \
- RB_ROTATE_RIGHT(head, parent, tmp, field); \
- tmp = parent; \
- parent = elm; \
- elm = tmp; \
- } \
- RB_SET_BLACKRED(parent, gparent, field); \
- RB_ROTATE_LEFT(head, gparent, tmp, field); \
- } \
- } \
- RB_COLOR(head->rbh_root, field) = RB_BLACK; \
- }
-
-#define RB_GENERATE_REMOVE_COLOR(name, type, field, attr) \
- attr void name##_RB_REMOVE_COLOR(struct name* head, struct type* parent, struct type* elm) { \
- struct type* tmp; \
- while ((elm == NULL || RB_COLOR(elm, field) == RB_BLACK) && elm != RB_ROOT(head)) { \
- if (RB_LEFT(parent, field) == elm) { \
- tmp = RB_RIGHT(parent, field); \
- if (RB_COLOR(tmp, field) == RB_RED) { \
- RB_SET_BLACKRED(tmp, parent, field); \
- RB_ROTATE_LEFT(head, parent, tmp, field); \
- tmp = RB_RIGHT(parent, field); \
- } \
- if ((RB_LEFT(tmp, field) == NULL || \
- RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) && \
- (RB_RIGHT(tmp, field) == NULL || \
- RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) { \
- RB_COLOR(tmp, field) = RB_RED; \
- elm = parent; \
- parent = RB_PARENT(elm, field); \
- } else { \
- if (RB_RIGHT(tmp, field) == NULL || \
- RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) { \
- struct type* oleft; \
- if ((oleft = RB_LEFT(tmp, field)) != NULL) \
- RB_COLOR(oleft, field) = RB_BLACK; \
- RB_COLOR(tmp, field) = RB_RED; \
- RB_ROTATE_RIGHT(head, tmp, oleft, field); \
- tmp = RB_RIGHT(parent, field); \
- } \
- RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
- RB_COLOR(parent, field) = RB_BLACK; \
- if (RB_RIGHT(tmp, field)) \
- RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK; \
- RB_ROTATE_LEFT(head, parent, tmp, field); \
- elm = RB_ROOT(head); \
- break; \
- } \
- } else { \
- tmp = RB_LEFT(parent, field); \
- if (RB_COLOR(tmp, field) == RB_RED) { \
- RB_SET_BLACKRED(tmp, parent, field); \
- RB_ROTATE_RIGHT(head, parent, tmp, field); \
- tmp = RB_LEFT(parent, field); \
- } \
- if ((RB_LEFT(tmp, field) == NULL || \
- RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) && \
- (RB_RIGHT(tmp, field) == NULL || \
- RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) { \
- RB_COLOR(tmp, field) = RB_RED; \
- elm = parent; \
- parent = RB_PARENT(elm, field); \
- } else { \
- if (RB_LEFT(tmp, field) == NULL || \
- RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) { \
- struct type* oright; \
- if ((oright = RB_RIGHT(tmp, field)) != NULL) \
- RB_COLOR(oright, field) = RB_BLACK; \
- RB_COLOR(tmp, field) = RB_RED; \
- RB_ROTATE_LEFT(head, tmp, oright, field); \
- tmp = RB_LEFT(parent, field); \
- } \
- RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
- RB_COLOR(parent, field) = RB_BLACK; \
- if (RB_LEFT(tmp, field)) \
- RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK; \
- RB_ROTATE_RIGHT(head, parent, tmp, field); \
- elm = RB_ROOT(head); \
- break; \
- } \
- } \
- } \
- if (elm) \
- RB_COLOR(elm, field) = RB_BLACK; \
- }
-
-#define RB_GENERATE_REMOVE(name, type, field, attr) \
- attr struct type* name##_RB_REMOVE(struct name* head, struct type* elm) { \
- struct type *child, *parent, *old = elm; \
- int color; \
- if (RB_LEFT(elm, field) == NULL) \
- child = RB_RIGHT(elm, field); \
- else if (RB_RIGHT(elm, field) == NULL) \
- child = RB_LEFT(elm, field); \
- else { \
- struct type* left; \
- elm = RB_RIGHT(elm, field); \
- while ((left = RB_LEFT(elm, field)) != NULL) \
- elm = left; \
- child = RB_RIGHT(elm, field); \
- parent = RB_PARENT(elm, field); \
- color = RB_COLOR(elm, field); \
- if (child) \
- RB_PARENT(child, field) = parent; \
- if (parent) { \
- if (RB_LEFT(parent, field) == elm) \
- RB_LEFT(parent, field) = child; \
- else \
- RB_RIGHT(parent, field) = child; \
- RB_AUGMENT(parent); \
- } else \
- RB_ROOT(head) = child; \
- if (RB_PARENT(elm, field) == old) \
- parent = elm; \
- (elm)->field = (old)->field; \
- if (RB_PARENT(old, field)) { \
- if (RB_LEFT(RB_PARENT(old, field), field) == old) \
- RB_LEFT(RB_PARENT(old, field), field) = elm; \
- else \
- RB_RIGHT(RB_PARENT(old, field), field) = elm; \
- RB_AUGMENT(RB_PARENT(old, field)); \
- } else \
- RB_ROOT(head) = elm; \
- RB_PARENT(RB_LEFT(old, field), field) = elm; \
- if (RB_RIGHT(old, field)) \
- RB_PARENT(RB_RIGHT(old, field), field) = elm; \
- if (parent) { \
- left = parent; \
- do { \
- RB_AUGMENT(left); \
- } while ((left = RB_PARENT(left, field)) != NULL); \
- } \
- goto color; \
- } \
- parent = RB_PARENT(elm, field); \
- color = RB_COLOR(elm, field); \
- if (child) \
- RB_PARENT(child, field) = parent; \
- if (parent) { \
- if (RB_LEFT(parent, field) == elm) \
- RB_LEFT(parent, field) = child; \
- else \
- RB_RIGHT(parent, field) = child; \
- RB_AUGMENT(parent); \
- } else \
- RB_ROOT(head) = child; \
- color: \
- if (color == RB_BLACK) \
- name##_RB_REMOVE_COLOR(head, parent, child); \
- return (old); \
- }
-
-#define RB_GENERATE_INSERT(name, type, field, cmp, attr) \
- /* Inserts a node into the RB tree */ \
- attr struct type* name##_RB_INSERT(struct name* head, struct type* elm) { \
- struct type* tmp; \
- struct type* parent = NULL; \
- int comp = 0; \
- tmp = RB_ROOT(head); \
- while (tmp) { \
- parent = tmp; \
- comp = (cmp)(elm, parent); \
- if (comp < 0) \
- tmp = RB_LEFT(tmp, field); \
- else if (comp > 0) \
- tmp = RB_RIGHT(tmp, field); \
- else \
- return (tmp); \
- } \
- RB_SET(elm, parent, field); \
- if (parent != NULL) { \
- if (comp < 0) \
- RB_LEFT(parent, field) = elm; \
- else \
- RB_RIGHT(parent, field) = elm; \
- RB_AUGMENT(parent); \
- } else \
- RB_ROOT(head) = elm; \
- name##_RB_INSERT_COLOR(head, elm); \
- return (NULL); \
- }
-
-#define RB_GENERATE_FIND(name, type, field, cmp, attr) \
- /* Finds the node with the same key as elm */ \
- attr struct type* name##_RB_FIND(struct name* head, struct type* elm) { \
- struct type* tmp = RB_ROOT(head); \
- int comp; \
- while (tmp) { \
- comp = cmp(elm, tmp); \
- if (comp < 0) \
- tmp = RB_LEFT(tmp, field); \
- else if (comp > 0) \
- tmp = RB_RIGHT(tmp, field); \
- else \
- return (tmp); \
- } \
- return (NULL); \
- }
-
-#define RB_GENERATE_NFIND(name, type, field, cmp, attr) \
- /* Finds the first node greater than or equal to the search key */ \
- attr struct type* name##_RB_NFIND(struct name* head, struct type* elm) { \
- struct type* tmp = RB_ROOT(head); \
- struct type* res = NULL; \
- int comp; \
- while (tmp) { \
- comp = cmp(elm, tmp); \
- if (comp < 0) { \
- res = tmp; \
- tmp = RB_LEFT(tmp, field); \
- } else if (comp > 0) \
- tmp = RB_RIGHT(tmp, field); \
- else \
- return (tmp); \
- } \
- return (res); \
- }
-
-#define RB_GENERATE_FIND_LIGHT(name, type, field, lcmp, attr) \
- /* Finds the node with the same key as elm */ \
- attr struct type* name##_RB_FIND_LIGHT(struct name* head, const void* lelm) { \
- struct type* tmp = RB_ROOT(head); \
- int comp; \
- while (tmp) { \
- comp = lcmp(lelm, tmp); \
- if (comp < 0) \
- tmp = RB_LEFT(tmp, field); \
- else if (comp > 0) \
- tmp = RB_RIGHT(tmp, field); \
- else \
- return (tmp); \
- } \
- return (NULL); \
- }
-
-#define RB_GENERATE_NFIND_LIGHT(name, type, field, lcmp, attr) \
- /* Finds the first node greater than or equal to the search key */ \
- attr struct type* name##_RB_NFIND_LIGHT(struct name* head, const void* lelm) { \
- struct type* tmp = RB_ROOT(head); \
- struct type* res = NULL; \
- int comp; \
- while (tmp) { \
- comp = lcmp(lelm, tmp); \
- if (comp < 0) { \
- res = tmp; \
- tmp = RB_LEFT(tmp, field); \
- } else if (comp > 0) \
- tmp = RB_RIGHT(tmp, field); \
- else \
- return (tmp); \
- } \
- return (res); \
- }
-
-#define RB_GENERATE_NEXT(name, type, field, attr) \
- /* ARGSUSED */ \
- attr struct type* name##_RB_NEXT(struct type* elm) { \
- if (RB_RIGHT(elm, field)) { \
- elm = RB_RIGHT(elm, field); \
- while (RB_LEFT(elm, field)) \
- elm = RB_LEFT(elm, field); \
- } else { \
- if (RB_PARENT(elm, field) && (elm == RB_LEFT(RB_PARENT(elm, field), field))) \
- elm = RB_PARENT(elm, field); \
- else { \
- while (RB_PARENT(elm, field) && (elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
- elm = RB_PARENT(elm, field); \
- elm = RB_PARENT(elm, field); \
- } \
- } \
- return (elm); \
- }
-
-#define RB_GENERATE_PREV(name, type, field, attr) \
- /* ARGSUSED */ \
- attr struct type* name##_RB_PREV(struct type* elm) { \
- if (RB_LEFT(elm, field)) { \
- elm = RB_LEFT(elm, field); \
- while (RB_RIGHT(elm, field)) \
- elm = RB_RIGHT(elm, field); \
- } else { \
- if (RB_PARENT(elm, field) && (elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
- elm = RB_PARENT(elm, field); \
- else { \
- while (RB_PARENT(elm, field) && (elm == RB_LEFT(RB_PARENT(elm, field), field))) \
- elm = RB_PARENT(elm, field); \
- elm = RB_PARENT(elm, field); \
- } \
- } \
- return (elm); \
- }
-
-#define RB_GENERATE_MINMAX(name, type, field, attr) \
- attr struct type* name##_RB_MINMAX(struct name* head, int val) { \
- struct type* tmp = RB_ROOT(head); \
- struct type* parent = NULL; \
- while (tmp) { \
- parent = tmp; \
- if (val < 0) \
- tmp = RB_LEFT(tmp, field); \
- else \
- tmp = RB_RIGHT(tmp, field); \
- } \
- return (parent); \
- }
-
-#define RB_NEGINF -1
-#define RB_INF 1
-
-#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
-#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
-#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
-#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
-#define RB_FIND_LIGHT(name, x, y) name##_RB_FIND_LIGHT(x, y)
-#define RB_NFIND_LIGHT(name, x, y) name##_RB_NFIND_LIGHT(x, y)
-#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
-#define RB_PREV(name, x, y) name##_RB_PREV(y)
-#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
-#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
-
-#define RB_FOREACH(x, name, head) \
- for ((x) = RB_MIN(name, head); (x) != NULL; (x) = name##_RB_NEXT(x))
-
-#define RB_FOREACH_FROM(x, name, y) \
- for ((x) = (y); ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); (x) = (y))
-
-#define RB_FOREACH_SAFE(x, name, head, y) \
- for ((x) = RB_MIN(name, head); ((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
- (x) = (y))
-
-#define RB_FOREACH_REVERSE(x, name, head) \
- for ((x) = RB_MAX(name, head); (x) != NULL; (x) = name##_RB_PREV(x))
-
-#define RB_FOREACH_REVERSE_FROM(x, name, y) \
- for ((x) = (y); ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); (x) = (y))
-
-#define RB_FOREACH_REVERSE_SAFE(x, name, head, y) \
- for ((x) = RB_MAX(name, head); ((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \
- (x) = (y))
+namespace Common {
+template <typename T>
+class RBHead {
+public:
+ [[nodiscard]] T* Root() {
+ return rbh_root;
+ }
+
+ [[nodiscard]] const T* Root() const {
+ return rbh_root;
+ }
+
+ void SetRoot(T* root) {
+ rbh_root = root;
+ }
+
+ [[nodiscard]] bool IsEmpty() const {
+ return Root() == nullptr;
+ }
+
+private:
+ T* rbh_root = nullptr;
+};
+
+enum class EntryColor {
+ Black,
+ Red,
+};
+
+template <typename T>
+class RBEntry {
+public:
+ [[nodiscard]] T* Left() {
+ return rbe_left;
+ }
+
+ [[nodiscard]] const T* Left() const {
+ return rbe_left;
+ }
+
+ void SetLeft(T* left) {
+ rbe_left = left;
+ }
+
+ [[nodiscard]] T* Right() {
+ return rbe_right;
+ }
+
+ [[nodiscard]] const T* Right() const {
+ return rbe_right;
+ }
+
+ void SetRight(T* right) {
+ rbe_right = right;
+ }
+
+ [[nodiscard]] T* Parent() {
+ return rbe_parent;
+ }
+
+ [[nodiscard]] const T* Parent() const {
+ return rbe_parent;
+ }
+
+ void SetParent(T* parent) {
+ rbe_parent = parent;
+ }
+
+ [[nodiscard]] bool IsBlack() const {
+ return rbe_color == EntryColor::Black;
+ }
+
+ [[nodiscard]] bool IsRed() const {
+ return rbe_color == EntryColor::Red;
+ }
+
+ [[nodiscard]] EntryColor Color() const {
+ return rbe_color;
+ }
+
+ void SetColor(EntryColor color) {
+ rbe_color = color;
+ }
+
+private:
+ T* rbe_left = nullptr;
+ T* rbe_right = nullptr;
+ T* rbe_parent = nullptr;
+ EntryColor rbe_color{};
+};
+
+template <typename Node>
+[[nodiscard]] RBEntry<Node>& RB_ENTRY(Node* node) {
+ return node->GetEntry();
+}
+
+template <typename Node>
+[[nodiscard]] const RBEntry<Node>& RB_ENTRY(const Node* node) {
+ return node->GetEntry();
+}
+
+template <typename Node>
+[[nodiscard]] Node* RB_PARENT(Node* node) {
+ return RB_ENTRY(node).Parent();
+}
+
+template <typename Node>
+[[nodiscard]] const Node* RB_PARENT(const Node* node) {
+ return RB_ENTRY(node).Parent();
+}
+
+template <typename Node>
+void RB_SET_PARENT(Node* node, Node* parent) {
+ return RB_ENTRY(node).SetParent(parent);
+}
+
+template <typename Node>
+[[nodiscard]] Node* RB_LEFT(Node* node) {
+ return RB_ENTRY(node).Left();
+}
+
+template <typename Node>
+[[nodiscard]] const Node* RB_LEFT(const Node* node) {
+ return RB_ENTRY(node).Left();
+}
+
+template <typename Node>
+void RB_SET_LEFT(Node* node, Node* left) {
+ return RB_ENTRY(node).SetLeft(left);
+}
+
+template <typename Node>
+[[nodiscard]] Node* RB_RIGHT(Node* node) {
+ return RB_ENTRY(node).Right();
+}
+
+template <typename Node>
+[[nodiscard]] const Node* RB_RIGHT(const Node* node) {
+ return RB_ENTRY(node).Right();
+}
+
+template <typename Node>
+void RB_SET_RIGHT(Node* node, Node* right) {
+ return RB_ENTRY(node).SetRight(right);
+}
+
+template <typename Node>
+[[nodiscard]] bool RB_IS_BLACK(const Node* node) {
+ return RB_ENTRY(node).IsBlack();
+}
+
+template <typename Node>
+[[nodiscard]] bool RB_IS_RED(const Node* node) {
+ return RB_ENTRY(node).IsRed();
+}
+
+template <typename Node>
+[[nodiscard]] EntryColor RB_COLOR(const Node* node) {
+ return RB_ENTRY(node).Color();
+}
+
+template <typename Node>
+void RB_SET_COLOR(Node* node, EntryColor color) {
+ return RB_ENTRY(node).SetColor(color);
+}
+
+template <typename Node>
+void RB_SET(Node* node, Node* parent) {
+ auto& entry = RB_ENTRY(node);
+ entry.SetParent(parent);
+ entry.SetLeft(nullptr);
+ entry.SetRight(nullptr);
+ entry.SetColor(EntryColor::Red);
+}
+
+template <typename Node>
+void RB_SET_BLACKRED(Node* black, Node* red) {
+ RB_SET_COLOR(black, EntryColor::Black);
+ RB_SET_COLOR(red, EntryColor::Red);
+}
+
+template <typename Node>
+void RB_ROTATE_LEFT(RBHead<Node>* head, Node* elm, Node*& tmp) {
+ tmp = RB_RIGHT(elm);
+ RB_SET_RIGHT(elm, RB_LEFT(tmp));
+ if (RB_RIGHT(elm) != nullptr) {
+ RB_SET_PARENT(RB_LEFT(tmp), elm);
+ }
+
+ RB_SET_PARENT(tmp, RB_PARENT(elm));
+ if (RB_PARENT(tmp) != nullptr) {
+ if (elm == RB_LEFT(RB_PARENT(elm))) {
+ RB_SET_LEFT(RB_PARENT(elm), tmp);
+ } else {
+ RB_SET_RIGHT(RB_PARENT(elm), tmp);
+ }
+ } else {
+ head->SetRoot(tmp);
+ }
+
+ RB_SET_LEFT(tmp, elm);
+ RB_SET_PARENT(elm, tmp);
+}
+
+template <typename Node>
+void RB_ROTATE_RIGHT(RBHead<Node>* head, Node* elm, Node*& tmp) {
+ tmp = RB_LEFT(elm);
+ RB_SET_LEFT(elm, RB_RIGHT(tmp));
+ if (RB_LEFT(elm) != nullptr) {
+ RB_SET_PARENT(RB_RIGHT(tmp), elm);
+ }
+
+ RB_SET_PARENT(tmp, RB_PARENT(elm));
+ if (RB_PARENT(tmp) != nullptr) {
+ if (elm == RB_LEFT(RB_PARENT(elm))) {
+ RB_SET_LEFT(RB_PARENT(elm), tmp);
+ } else {
+ RB_SET_RIGHT(RB_PARENT(elm), tmp);
+ }
+ } else {
+ head->SetRoot(tmp);
+ }
+
+ RB_SET_RIGHT(tmp, elm);
+ RB_SET_PARENT(elm, tmp);
+}
+
+template <typename Node>
+void RB_INSERT_COLOR(RBHead<Node>* head, Node* elm) {
+ Node* parent = nullptr;
+ Node* tmp = nullptr;
+
+ while ((parent = RB_PARENT(elm)) != nullptr && RB_IS_RED(parent)) {
+ Node* gparent = RB_PARENT(parent);
+ if (parent == RB_LEFT(gparent)) {
+ tmp = RB_RIGHT(gparent);
+ if (tmp && RB_IS_RED(tmp)) {
+ RB_SET_COLOR(tmp, EntryColor::Black);
+ RB_SET_BLACKRED(parent, gparent);
+ elm = gparent;
+ continue;
+ }
+
+ if (RB_RIGHT(parent) == elm) {
+ RB_ROTATE_LEFT(head, parent, tmp);
+ tmp = parent;
+ parent = elm;
+ elm = tmp;
+ }
+
+ RB_SET_BLACKRED(parent, gparent);
+ RB_ROTATE_RIGHT(head, gparent, tmp);
+ } else {
+ tmp = RB_LEFT(gparent);
+ if (tmp && RB_IS_RED(tmp)) {
+ RB_SET_COLOR(tmp, EntryColor::Black);
+ RB_SET_BLACKRED(parent, gparent);
+ elm = gparent;
+ continue;
+ }
+
+ if (RB_LEFT(parent) == elm) {
+ RB_ROTATE_RIGHT(head, parent, tmp);
+ tmp = parent;
+ parent = elm;
+ elm = tmp;
+ }
+
+ RB_SET_BLACKRED(parent, gparent);
+ RB_ROTATE_LEFT(head, gparent, tmp);
+ }
+ }
+
+ RB_SET_COLOR(head->Root(), EntryColor::Black);
+}
+
+template <typename Node>
+void RB_REMOVE_COLOR(RBHead<Node>* head, Node* parent, Node* elm) {
+ Node* tmp;
+ while ((elm == nullptr || RB_IS_BLACK(elm)) && elm != head->Root()) {
+ if (RB_LEFT(parent) == elm) {
+ tmp = RB_RIGHT(parent);
+ if (RB_IS_RED(tmp)) {
+ RB_SET_BLACKRED(tmp, parent);
+ RB_ROTATE_LEFT(head, parent, tmp);
+ tmp = RB_RIGHT(parent);
+ }
+
+ if ((RB_LEFT(tmp) == nullptr || RB_IS_BLACK(RB_LEFT(tmp))) &&
+ (RB_RIGHT(tmp) == nullptr || RB_IS_BLACK(RB_RIGHT(tmp)))) {
+ RB_SET_COLOR(tmp, EntryColor::Red);
+ elm = parent;
+ parent = RB_PARENT(elm);
+ } else {
+ if (RB_RIGHT(tmp) == nullptr || RB_IS_BLACK(RB_RIGHT(tmp))) {
+ Node* oleft;
+ if ((oleft = RB_LEFT(tmp)) != nullptr) {
+ RB_SET_COLOR(oleft, EntryColor::Black);
+ }
+
+ RB_SET_COLOR(tmp, EntryColor::Red);
+ RB_ROTATE_RIGHT(head, tmp, oleft);
+ tmp = RB_RIGHT(parent);
+ }
+
+ RB_SET_COLOR(tmp, RB_COLOR(parent));
+ RB_SET_COLOR(parent, EntryColor::Black);
+ if (RB_RIGHT(tmp)) {
+ RB_SET_COLOR(RB_RIGHT(tmp), EntryColor::Black);
+ }
+
+ RB_ROTATE_LEFT(head, parent, tmp);
+ elm = head->Root();
+ break;
+ }
+ } else {
+ tmp = RB_LEFT(parent);
+ if (RB_IS_RED(tmp)) {
+ RB_SET_BLACKRED(tmp, parent);
+ RB_ROTATE_RIGHT(head, parent, tmp);
+ tmp = RB_LEFT(parent);
+ }
+
+ if ((RB_LEFT(tmp) == nullptr || RB_IS_BLACK(RB_LEFT(tmp))) &&
+ (RB_RIGHT(tmp) == nullptr || RB_IS_BLACK(RB_RIGHT(tmp)))) {
+ RB_SET_COLOR(tmp, EntryColor::Red);
+ elm = parent;
+ parent = RB_PARENT(elm);
+ } else {
+ if (RB_LEFT(tmp) == nullptr || RB_IS_BLACK(RB_LEFT(tmp))) {
+ Node* oright;
+ if ((oright = RB_RIGHT(tmp)) != nullptr) {
+ RB_SET_COLOR(oright, EntryColor::Black);
+ }
+
+ RB_SET_COLOR(tmp, EntryColor::Red);
+ RB_ROTATE_LEFT(head, tmp, oright);
+ tmp = RB_LEFT(parent);
+ }
+
+ RB_SET_COLOR(tmp, RB_COLOR(parent));
+ RB_SET_COLOR(parent, EntryColor::Black);
+
+ if (RB_LEFT(tmp)) {
+ RB_SET_COLOR(RB_LEFT(tmp), EntryColor::Black);
+ }
+
+ RB_ROTATE_RIGHT(head, parent, tmp);
+ elm = head->Root();
+ break;
+ }
+ }
+ }
+
+ if (elm) {
+ RB_SET_COLOR(elm, EntryColor::Black);
+ }
+}
+
+template <typename Node>
+Node* RB_REMOVE(RBHead<Node>* head, Node* elm) {
+ Node* child = nullptr;
+ Node* parent = nullptr;
+ Node* old = elm;
+ EntryColor color{};
+
+ const auto finalize = [&] {
+ if (color == EntryColor::Black) {
+ RB_REMOVE_COLOR(head, parent, child);
+ }
+
+ return old;
+ };
+
+ if (RB_LEFT(elm) == nullptr) {
+ child = RB_RIGHT(elm);
+ } else if (RB_RIGHT(elm) == nullptr) {
+ child = RB_LEFT(elm);
+ } else {
+ Node* left;
+ elm = RB_RIGHT(elm);
+ while ((left = RB_LEFT(elm)) != nullptr) {
+ elm = left;
+ }
+
+ child = RB_RIGHT(elm);
+ parent = RB_PARENT(elm);
+ color = RB_COLOR(elm);
+
+ if (child) {
+ RB_SET_PARENT(child, parent);
+ }
+ if (parent) {
+ if (RB_LEFT(parent) == elm) {
+ RB_SET_LEFT(parent, child);
+ } else {
+ RB_SET_RIGHT(parent, child);
+ }
+ } else {
+ head->SetRoot(child);
+ }
+
+ if (RB_PARENT(elm) == old) {
+ parent = elm;
+ }
+
+ elm->SetEntry(old->GetEntry());
+
+ if (RB_PARENT(old)) {
+ if (RB_LEFT(RB_PARENT(old)) == old) {
+ RB_SET_LEFT(RB_PARENT(old), elm);
+ } else {
+ RB_SET_RIGHT(RB_PARENT(old), elm);
+ }
+ } else {
+ head->SetRoot(elm);
+ }
+ RB_SET_PARENT(RB_LEFT(old), elm);
+ if (RB_RIGHT(old)) {
+ RB_SET_PARENT(RB_RIGHT(old), elm);
+ }
+ if (parent) {
+ left = parent;
+ }
+
+ return finalize();
+ }
+
+ parent = RB_PARENT(elm);
+ color = RB_COLOR(elm);
+
+ if (child) {
+ RB_SET_PARENT(child, parent);
+ }
+ if (parent) {
+ if (RB_LEFT(parent) == elm) {
+ RB_SET_LEFT(parent, child);
+ } else {
+ RB_SET_RIGHT(parent, child);
+ }
+ } else {
+ head->SetRoot(child);
+ }
+
+ return finalize();
+}
+
+// Inserts a node into the RB tree
+template <typename Node, typename CompareFunction>
+Node* RB_INSERT(RBHead<Node>* head, Node* elm, CompareFunction cmp) {
+ Node* parent = nullptr;
+ Node* tmp = head->Root();
+ int comp = 0;
+
+ while (tmp) {
+ parent = tmp;
+ comp = cmp(elm, parent);
+ if (comp < 0) {
+ tmp = RB_LEFT(tmp);
+ } else if (comp > 0) {
+ tmp = RB_RIGHT(tmp);
+ } else {
+ return tmp;
+ }
+ }
+
+ RB_SET(elm, parent);
+
+ if (parent != nullptr) {
+ if (comp < 0) {
+ RB_SET_LEFT(parent, elm);
+ } else {
+ RB_SET_RIGHT(parent, elm);
+ }
+ } else {
+ head->SetRoot(elm);
+ }
+
+ RB_INSERT_COLOR(head, elm);
+ return nullptr;
+}
+
+// Finds the node with the same key as elm
+template <typename Node, typename CompareFunction>
+Node* RB_FIND(RBHead<Node>* head, Node* elm, CompareFunction cmp) {
+ Node* tmp = head->Root();
+
+ while (tmp) {
+ const int comp = cmp(elm, tmp);
+ if (comp < 0) {
+ tmp = RB_LEFT(tmp);
+ } else if (comp > 0) {
+ tmp = RB_RIGHT(tmp);
+ } else {
+ return tmp;
+ }
+ }
+
+ return nullptr;
+}
+
+// Finds the first node greater than or equal to the search key
+template <typename Node, typename CompareFunction>
+Node* RB_NFIND(RBHead<Node>* head, Node* elm, CompareFunction cmp) {
+ Node* tmp = head->Root();
+ Node* res = nullptr;
+
+ while (tmp) {
+ const int comp = cmp(elm, tmp);
+ if (comp < 0) {
+ res = tmp;
+ tmp = RB_LEFT(tmp);
+ } else if (comp > 0) {
+ tmp = RB_RIGHT(tmp);
+ } else {
+ return tmp;
+ }
+ }
+
+ return res;
+}
+
+// Finds the node with the same key as lelm
+template <typename Node, typename CompareFunction>
+Node* RB_FIND_LIGHT(RBHead<Node>* head, const void* lelm, CompareFunction lcmp) {
+ Node* tmp = head->Root();
+
+ while (tmp) {
+ const int comp = lcmp(lelm, tmp);
+ if (comp < 0) {
+ tmp = RB_LEFT(tmp);
+ } else if (comp > 0) {
+ tmp = RB_RIGHT(tmp);
+ } else {
+ return tmp;
+ }
+ }
+
+ return nullptr;
+}
+
+// Finds the first node greater than or equal to the search key
+template <typename Node, typename CompareFunction>
+Node* RB_NFIND_LIGHT(RBHead<Node>* head, const void* lelm, CompareFunction lcmp) {
+ Node* tmp = head->Root();
+ Node* res = nullptr;
+
+ while (tmp) {
+ const int comp = lcmp(lelm, tmp);
+ if (comp < 0) {
+ res = tmp;
+ tmp = RB_LEFT(tmp);
+ } else if (comp > 0) {
+ tmp = RB_RIGHT(tmp);
+ } else {
+ return tmp;
+ }
+ }
+
+ return res;
+}
+
+template <typename Node>
+Node* RB_NEXT(Node* elm) {
+ if (RB_RIGHT(elm)) {
+ elm = RB_RIGHT(elm);
+ while (RB_LEFT(elm)) {
+ elm = RB_LEFT(elm);
+ }
+ } else {
+ if (RB_PARENT(elm) && (elm == RB_LEFT(RB_PARENT(elm)))) {
+ elm = RB_PARENT(elm);
+ } else {
+ while (RB_PARENT(elm) && (elm == RB_RIGHT(RB_PARENT(elm)))) {
+ elm = RB_PARENT(elm);
+ }
+ elm = RB_PARENT(elm);
+ }
+ }
+ return elm;
+}
+
+template <typename Node>
+Node* RB_PREV(Node* elm) {
+ if (RB_LEFT(elm)) {
+ elm = RB_LEFT(elm);
+ while (RB_RIGHT(elm)) {
+ elm = RB_RIGHT(elm);
+ }
+ } else {
+ if (RB_PARENT(elm) && (elm == RB_RIGHT(RB_PARENT(elm)))) {
+ elm = RB_PARENT(elm);
+ } else {
+ while (RB_PARENT(elm) && (elm == RB_LEFT(RB_PARENT(elm)))) {
+ elm = RB_PARENT(elm);
+ }
+ elm = RB_PARENT(elm);
+ }
+ }
+ return elm;
+}
+
+template <typename Node>
+Node* RB_MINMAX(RBHead<Node>* head, bool is_min) {
+ Node* tmp = head->Root();
+ Node* parent = nullptr;
+
+ while (tmp) {
+ parent = tmp;
+ if (is_min) {
+ tmp = RB_LEFT(tmp);
+ } else {
+ tmp = RB_RIGHT(tmp);
+ }
+ }
+
+ return parent;
+}
+
+template <typename Node>
+Node* RB_MIN(RBHead<Node>* head) {
+ return RB_MINMAX(head, true);
+}
+
+template <typename Node>
+Node* RB_MAX(RBHead<Node>* head) {
+ return RB_MINMAX(head, false);
+}
+} // namespace Common
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 08:00:28 +0100