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Add red-black tree base

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This commit is contained in:
Gregory Lirent
2022-06-05 21:40:37 +03:00
parent da1f20452c
commit 8058daf234
3 changed files with 432 additions and 6 deletions
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src/__internal/rbtree.h
+49
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@@ -0,0 +1,49 @@
/* This software is licensed by the Apache License 2.0, see LICENSE file */
/* Copyright © 2022 Gregory Lirent */
#include "vnode.h"
#ifndef LIBCDSB_SRC_INTERNAL_RBTREE_H
#define LIBCDSB_SRC_INTERNAL_RBTREE_H
typedef enum libcdsb_rbtree_iter_flags {
RBI_INORDER = 0,
RBI_PREORDER = 1,
RBI_POSTORDER = 2,
RBI_REVERSE = 4,
} rbiter_f;
typedef struct libcdsb_rbtree_node {
struct libcdsb_rbtree_node* left;
struct libcdsb_rbtree_node* right;
struct libcdsb_rbtree_node* parent;
vnode_t value;
short colored;
} rbnode_t;
typedef struct libcdsb_rbtree_iter {
struct libcdsb_rbtree_node* cursor;
int flags;
} rbiter_t;
extern const rbnode_t LIBCDSB_RBTREE_NODE_EMPTY[1];
extern void* libcdsb_rbtree_node_create(void* value, rbnode_t* parent, int colored, int size);
extern void libcdsb_rbtree_node_fixup (rbnode_t** root, rbnode_t* node);
extern rbnode_t* libcdsb_rbtree_node_delete(rbnode_t** root, rbnode_t* node);
extern _Bool libcdsb_rbtree_iter_init (rbiter_t* iter, rbnode_t *const *root, rbiter_f flags);
extern rbnode_t* libcdsb_rbtree_iter_next (rbiter_t* iter);
extern void libcdsb_rbtree_iter_reset(rbiter_t* iter);
#define rbnode_empty ((rbnode_t*)LIBCDSB_RBTREE_NODE_EMPTY)
#define rbnode_create(v, p, c) ((rbnode_t*)libcdsb_rbtree_node_create(v, p, c, sizeof(rbnode_t)))
#define rbnode_fixup libcdsb_rbtree_node_fixup
#define rbnode_delete libcdsb_rbtree_node_delete
#define rbnode_is_empty(n) ((n) == rbnode_empty)
#define rbnode_is_root(n) rbnode_is_empty((n)->parent)
#endif /* LIBCDSB_SRC_INTERNAL_RBTREE_H */
src/__internal/vnode.h
-6
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@@ -6,12 +6,6 @@
#ifndef LIBCDSB_SRC_INTERNAL_VNODE_H
#define LIBCDSB_SRC_INTERNAL_VNODE_H
#define mark_ptr(x, m) ((void*)((uintptr_t)(x)|(uintptr_t)(m)))
#define unmark_ptr(x) ((void*)((uintptr_t)(x)&~(uintptr_t)(_Alignof(max_align_t)-1)))
#define get_mark(x) ((int)((uintptr_t)(x)&(uintptr_t)(_Alignof(max_align_t)-1)))
#define unmark_ptr16(x) ((void*)((uintptr_t)(x)&~(uintptr_t)(15)))
#define get_mark16(x) ((int)((uintptr_t)(x)&(uintptr_t)(15)))
#define is_permissible(T) (sizeof(void*) >= sizeof(T) && _Alignof(void*) >= _Alignof(T))
typedef union {