207 lines
6.1 KiB
C
207 lines
6.1 KiB
C
/*
|
|
Copyright (c) 2014 Anton Titov.
|
|
|
|
Copyright (c) 2014 pCloud Ltd. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met: Redistributions of source code must retain the above
|
|
copyright notice, this list of conditions and the following
|
|
disclaimer. Redistributions in binary form must reproduce the
|
|
above copyright notice, this list of conditions and the following
|
|
disclaimer in the documentation and/or other materials provided
|
|
with the distribution. Neither the name of pCloud Ltd nor the
|
|
names of its contributors may be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL pCloud
|
|
Ltd BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
|
|
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
|
DAMAGE.
|
|
*/
|
|
|
|
#ifndef _PSYNC_TREE_H
|
|
#define _PSYNC_TREE_H
|
|
|
|
#include "pcompiler.h"
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
|
|
typedef struct _psync_tree {
|
|
struct _psync_tree *left;
|
|
struct _psync_tree *right;
|
|
struct _psync_tree *parent;
|
|
long int height;
|
|
} psync_tree;
|
|
|
|
#define PSYNC_TREE_EMPTY NULL
|
|
|
|
#define psync_tree_isempty(l) ((l)==NULL)
|
|
#define psync_tree_element(a, t, n) ((t *)((char *)(a)-offsetof(t, n)))
|
|
#define psync_tree_for_each(a, l) for (a=psync_tree_get_first(l); a!=NULL; a=psync_tree_get_next(a))
|
|
#define psync_tree_for_each_element(a, l, t, n) for (a=psync_tree_element(psync_tree_get_first(l), t, n);\
|
|
&a->n!=NULL;\
|
|
a=psync_tree_element(psync_tree_get_next(&a->n), t, n))
|
|
|
|
#define psync_tree_for_each_element_call(l, t, n, c)\
|
|
do {\
|
|
psync_tree *___tmpa;\
|
|
___tmpa=psync_tree_get_first(l);\
|
|
while (___tmpa){\
|
|
c(psync_tree_element(___tmpa, t, n));\
|
|
___tmpa=psync_tree_get_next(___tmpa);\
|
|
}\
|
|
} while (0)
|
|
|
|
#define psync_tree_for_each_element_call_safe(l, t, n, c)\
|
|
do {\
|
|
psync_tree *___tmpa, *___tmpb;\
|
|
___tmpa=psync_tree_get_first_safe(l);\
|
|
while (___tmpa){\
|
|
___tmpb=psync_tree_get_next_safe(___tmpa);\
|
|
c(psync_tree_element(___tmpa, t, n));\
|
|
___tmpa=___tmpb;\
|
|
}\
|
|
} while (0)
|
|
|
|
|
|
typedef int (*psync_tree_compare)(const psync_tree *, const psync_tree *);
|
|
|
|
static inline long int psync_tree_height(psync_tree *tree){
|
|
return tree?tree->height:0;
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_first(psync_tree *tree){
|
|
if (!tree)
|
|
return tree;
|
|
while (tree->left)
|
|
tree=tree->left;
|
|
return tree;
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_last(psync_tree *tree){
|
|
if (!tree)
|
|
return tree;
|
|
while (tree->right)
|
|
tree=tree->right;
|
|
return tree;
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_next(psync_tree *tree){
|
|
if (tree->right){
|
|
tree=tree->right;
|
|
while (tree->left)
|
|
tree=tree->left;
|
|
return tree;
|
|
}
|
|
else {
|
|
while (tree->parent && tree==tree->parent->right)
|
|
tree=tree->parent;
|
|
return tree->parent;
|
|
}
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_prev(psync_tree *tree){
|
|
if (tree->left){
|
|
tree=tree->left;
|
|
while (tree->right)
|
|
tree=tree->right;
|
|
return tree;
|
|
}
|
|
else {
|
|
while (tree->parent && tree==tree->parent->left)
|
|
tree=tree->parent;
|
|
return tree->parent;
|
|
}
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_first_safe(psync_tree *tree){
|
|
if (!tree)
|
|
return tree;
|
|
while (1){
|
|
if (tree->left)
|
|
tree=tree->left;
|
|
else if (tree->right)
|
|
tree=tree->right;
|
|
else
|
|
break;
|
|
}
|
|
return tree;
|
|
}
|
|
|
|
static inline psync_tree *psync_tree_get_next_safe(psync_tree *tree){
|
|
if (!tree->parent)
|
|
return NULL;
|
|
if (tree->parent->right==tree || tree->parent->right==NULL)
|
|
return tree->parent;
|
|
tree=tree->parent->right;
|
|
while (1){
|
|
if (tree->left)
|
|
tree=tree->left;
|
|
else if (tree->right)
|
|
tree=tree->right;
|
|
else
|
|
break;
|
|
}
|
|
return tree;
|
|
}
|
|
|
|
psync_tree *psync_tree_get_add_after(psync_tree *tree, psync_tree *node, psync_tree *newnode);
|
|
psync_tree *psync_tree_get_add_before(psync_tree *tree, psync_tree *node, psync_tree *newnode);
|
|
psync_tree *psync_tree_get_added_at(psync_tree *tree, psync_tree *parent, psync_tree *newnode);
|
|
|
|
psync_tree *psync_tree_get_del(psync_tree *tree, psync_tree *node);
|
|
|
|
|
|
static inline psync_tree *psync_tree_get_add(psync_tree *tree, psync_tree *newnode, psync_tree_compare comp){
|
|
psync_tree *el;
|
|
if (!tree)
|
|
return psync_tree_get_add_after(tree, NULL, newnode);
|
|
el=tree;
|
|
while (1){
|
|
if (comp(newnode, el)<0){
|
|
if (el->left)
|
|
el=el->left;
|
|
else
|
|
return psync_tree_get_add_before(tree, el, newnode);
|
|
}
|
|
else{
|
|
if (el->right)
|
|
el=el->right;
|
|
else
|
|
return psync_tree_get_add_after(tree, el, newnode);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void psync_tree_add_after(psync_tree **tree, psync_tree *node, psync_tree *newnode){
|
|
*tree=psync_tree_get_add_after(*tree, node, newnode);
|
|
}
|
|
|
|
static inline void psync_tree_add_before(psync_tree **tree, psync_tree *node, psync_tree *newnode){
|
|
*tree=psync_tree_get_add_before(*tree, node, newnode);
|
|
}
|
|
|
|
static inline void psync_tree_added_at(psync_tree **tree, psync_tree *parent, psync_tree *newnode){
|
|
*tree=psync_tree_get_added_at(*tree, parent, newnode);
|
|
}
|
|
|
|
static inline void psync_tree_del(psync_tree **tree, psync_tree *node){
|
|
*tree=psync_tree_get_del(*tree, node);
|
|
}
|
|
|
|
static inline void psync_tree_add(psync_tree **tree, psync_tree *newnode, psync_tree_compare comp){
|
|
*tree=psync_tree_get_add(*tree, newnode, comp);
|
|
}
|
|
|
|
#endif
|