Refactor rbtree types

This commit is contained in:
Gregory Lirent 2022-08-14 18:24:16 +03:00
parent aa4828b4ed
commit 511516b218
8 changed files with 332 additions and 393 deletions

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@ -29,4 +29,19 @@ extern rbnode_t* libcdsb_rbtree_node_delete(rbnode_t** root, rbnode_t* node);
#define rbnode_is_empty(n) ((n) == rbnode_empty)
#define rbnode_is_root(n) rbnode_is_empty((n)->parent)
extern void* libcdsb_rbtree_duplicate(const rbnode_t* s, void* (*node_duplicate)(void* src, void* parent, void* info), void* info);
extern int libcdsb_rbtree_compare(const rbnode_t* s0, const rbnode_t* s1, int (*node_compare)(const rbnode_t* s0, const rbnode_t* s1, void* info), void* info);
extern hash_t libcdsb_rbtree_hash(const void* s, hash_t (*node_hash)(const void* s, void* info), void* info);
extern size_t libcdsb_rbtree_size(const void* s);
extern void libcdsb_rbtree_free(void* x, void (*node_free)(void* x, void* info), void* info);
#define rbtree_duplicate libcdsb_rbtree_duplicate
#define rbtree_compare libcdsb_rbtree_compare
#define rbtree_hash libcdsb_rbtree_hash
#define rbtree_size libcdsb_rbtree_size
#define rbtree_free libcdsb_rbtree_free
#endif /* LIBCDSB_SRC_INTERNAL_RBTREE_H */

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@ -3,106 +3,89 @@
#include "include.h"
#define mtree_duplicate(s, t) rbtree_duplicate((rbnode_t*)s, (void*)mnode_duplicate, t)
#define mtree_compare(s0, s1, t) rbtree_compare((void*)s0, (void*)s1, (void*)mnode_compare, (void*)t)
static mnode_t* mnode_duplicate(const mnode_t* s, mnode_t* p, const vtype* t) {
mnode_t* x;
x = mnode_create(vnode_duplicate(&s->key, *t), p, s->colored);
x->type = s->type;
x->value = vnode_duplicate(&s->value, s->type);
return x;
}
static int mnode_compare(const mnode_t* s0, const mnode_t* s1, vtype* t) {
int c = vnode_compare_eq(&s0->key, &s1->key, *t);
return !c ? vnode_compare(&s0->value, s0->type, &s1->value, s1->type) : c;
}
static hash_t mnode_hash(const mnode_t* s, vtype* tp) {
vtype t = (!is_null(tp)) ? *tp : VTYPE_POINTER;
return vnode_hash(s->key, t) + vnode_hash(s->value, s->type) + t;
}
void libcdsb_mnode_free(mnode_t* x, vtype* t) {
vnode_free(&x->key, *t);
vnode_free(&x->value, x->type);
}
/*#####################################################################################################################*/
hash_t map_hash(const map_t* s) {
return rbtree_hash(s->root, (void*)mnode_hash, (void*)&s->type) + VTYPE_MAP;
}
void map_init(map_t* x, vtype t) {
x->root = mnode_empty;
x->type = t;
}
void map_free(map_t* x) {
mnode_t* t;
mnode_t* c;
c = x->root;
while (!mnode_is_empty(x->root)) {
if (!mnode_is_empty(c->left)) {
c = c->left;
} else if (!mnode_is_empty(c->right)) {
c = c->right;
} else if (!mnode_is_root(c)) {
vnode_free(&c->key, x->type);
vnode_free(&c->value, c->type);
t = c;
c = c->parent;
if (t == c->left) c->left = mnode_empty;
else c->right = mnode_empty;
free(t);
} else {
vnode_free(&c->key, x->type);
vnode_free(&c->value, c->type);
x->root = mnode_empty;
}
}
rbtree_free(x->root, (void*)mnode_free, &x->type);
x->root = mnode_empty;
x->type = 0;
}
/*#####################################################################################################################*/
size_t map_size(const map_t* x) {
stack_t z = { .prev = 0, .value = x->root };
size_t n = 0;
rbnode_t* c;
if (!mnode_is_empty(x->root)) {
while ((c = stack_pop(&z))) {
++n;
if (!rbnode_is_empty(c->left))
stack_push(&z, c->left);
if (!rbnode_is_empty(c->right))
stack_push(&z, c->right);
}
}
return n;
return rbtree_size(x->root);
}
/*#####################################################################################################################*/
int map_compare(const map_t* s0, const map_t* s1) {
stack_t z = { .prev = 0, .value = 0 };
vtype t = s0->type;
int c = 0;
if (s0 == s1 || s0->root == s1->root) return 0;
if (s0 == s1) return 0;
if (s0->type != s1->type) return s0->type - s1->type;
stack_push(&z, s1->root);
stack_push(&z, s0->root);
for (mnode_t *c0, *c1;!is_null(z.value);) {
c0 = stack_pop(&z);
c1 = stack_pop(&z);
if (mnode_is_empty(c0) || mnode_is_empty(c1)) {
if (c0 != c1) {
stack_flush(&z);
return mnode_is_empty(c0) ? -1 : 1;
}
} else if ((c = vnode_compare(c0->key, t, c1->key, t)) || (c = vnode_compare(c0->value, c0->type, c1->value, c1->type))) {
if (c0->left == c1->right) {
c = vnode_compare(c1->key, t, c0->right->key, t );
if (!c) c = vnode_compare(c1->value, c1->type, c0->right->value, c0->type);
if (!c) c = vnode_compare(c1->left->key, t, c0->key, t );
if (!c) c = vnode_compare(c1->left->value, c1->type, c0->value, c0->type);
} else if (c0->right == c1->left) {
c = vnode_compare(c0->key, t, c1->right->key, t );
if (!c) c = vnode_compare(c0->value, c0->type, c1->right->value, c1->type);
if (!c) c = vnode_compare(c0->left->key, t, c1->key, t );
if (!c) c = vnode_compare(c0->left->value, c0->type, c1->value, c1->type);
}
if (c) { stack_flush(&z); return c; }
} else {
stack_push(&z, c1->right);
stack_push(&z, c0->right);
stack_push(&z, c1->left);
stack_push(&z, c0->left);
}
}
return 0;
return mtree_compare(s0->root, s1->root, &s0->type);
}
/*#####################################################################################################################*/
map_t map_copy(const map_t* s) {
map_t x;
x.type = s->type;
x.root = mtree_duplicate(s->root, &x.type);
return x;
}
map_t* map_duplicate(const map_t* s) {
map_t *x = malloc(sizeof(*x));
x->type = s->type;
x->root = mtree_duplicate(s->root, &x->type);
return x;
}
void map_copy_init(map_t* x, const map_t* s) {
x->type = s->type;
x->root = mtree_duplicate(s->root, &x->type);
}

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@ -1,120 +0,0 @@
/* This software is licensed by the MIT License, see LICENSE file */
/* Copyright © 2022 Gregory Lirent */
#include "include.h"
map_t map_copy(const map_t* s) {
map_t x = { .type = s->type };
stack_t z = { .prev = 0, .value = s->root };
vtype t = s->type;
if (!mnode_is_empty(s->root)) {
x.root = mnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x.root);
do {
mnode_t *p0 = stack_pop(&z);
mnode_t *p1 = stack_pop(&z);
if (!mnode_is_empty(p1->left)) {
p0->left = mnode_create(vnode_duplicate(&p1->left->key, t), p0, p1->left->colored);
p0->left->type = p1->left->type;
p0->left->value = vnode_duplicate(&p1->left->value, p1->left->type);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!mnode_is_empty(p1->right)) {
p0->right = mnode_create(vnode_duplicate(&p1->right->key, t), p0, p1->right->colored);
p0->right->type = p1->right->type;
p0->right->value = vnode_duplicate(&p1->right->value, p1->right->type);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x.root = mnode_empty;
return x;
}
map_t* map_duplicate(const map_t* s) {
map_t* x = malloc(sizeof(*x));
stack_t z = { .prev = 0, .value = s->root };
vtype t = x->type = s->type;
if (!mnode_is_empty(s->root)) {
x->root = mnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x->root);
do {
mnode_t *p0 = stack_pop(&z);
mnode_t *p1 = stack_pop(&z);
if (!mnode_is_empty(p1->left)) {
p0->left = mnode_create(vnode_duplicate(&p1->left->key, t), p0, p1->left->colored);
p0->left->type = p1->left->type;
p0->left->value = vnode_duplicate(&p1->left->value, p1->left->type);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!mnode_is_empty(p1->right)) {
p0->right = mnode_create(vnode_duplicate(&p1->right->key, t), p0, p1->right->colored);
p0->right->type = p1->right->type;
p0->right->value = vnode_duplicate(&p1->right->value, p1->right->type);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x->root = mnode_empty;
return x;
}
void map_copy_init(map_t* x, const map_t* s) {
stack_t z = { .prev = 0, .value = s->root };
vtype t = x->type = s->type;
if (!mnode_is_empty(s->root)) {
x->root = mnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x->root);
do {
mnode_t *p0 = stack_pop(&z);
mnode_t *p1 = stack_pop(&z);
if (!mnode_is_empty(p1->left)) {
p0->left = mnode_create(vnode_duplicate(&p1->left->key, t), p0, p1->left->colored);
p0->left->type = p1->left->type;
p0->left->value = vnode_duplicate(&p1->left->value, p1->left->type);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!mnode_is_empty(p1->right)) {
p0->right = mnode_create(vnode_duplicate(&p1->right->key, t), p0, p1->right->colored);
p0->right->type = p1->right->type;
p0->right->value = vnode_duplicate(&p1->right->value, p1->right->type);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x->root = mnode_empty;
}

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@ -20,8 +20,7 @@ bool libcdsb_map_update(map_t* x, const void* k, vtype kt, const void* v, vtype
cmp = vtype_compare(k, kt, vnode_peek(&n->key, kt), kt);
if (cmp == 0) {
vnode_free(&n->key, kt);
vnode_free(&n->value, n->type);
mnode_free(n, &kt);
n->key = kn;
n->value = vnode_create(v, vt);
@ -66,8 +65,7 @@ int libcdsb_map_find(map_t* x, const void* k, vtype t, void* _, map_access_callb
if (cut) {
c = mnode_delete(&x->root, c);
vnode_free(&c->key, x->type);
vnode_free(&c->value, c->type);
mnode_free(c, &x->type);
free(c);
}
@ -76,7 +74,6 @@ int libcdsb_map_find(map_t* x, const void* k, vtype t, void* _, map_access_callb
}
return -1;
}
@ -91,13 +88,11 @@ int libcdsb_map_foreach(map_t* x, void* dt, map_access_callback callback, bool f
if ((r = callback(vnode_peek(&c->key, x->type), x->type, vnode_peek(&c->value, c->type), c->type, dt)))
break;
if (!mnode_is_empty(c->right)) stack_push(&z, c->right);
if (!mnode_is_empty(c->left)) stack_push(&z, c->left);
if (flush) {
vnode_free(&c->key, x->type);
vnode_free(&c->value, c->type);
mnode_free(c, &x->type);
free(c);
}
}
@ -107,8 +102,7 @@ int libcdsb_map_foreach(map_t* x, void* dt, map_access_callback callback, bool f
if (!mnode_is_empty(c->right)) stack_push(&z, c->right);
if (!mnode_is_empty(c->left)) stack_push(&z, c->left);
vnode_free(&c->key, x->type);
vnode_free(&c->value, c->type);
mnode_free(c, &x->type);
free(c);
c = stack_pop(&z);

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@ -28,6 +28,7 @@ static_assert(offsetof(struct libcdsb_rbtree_node, value) == offsetof(struct lib
static_assert(offsetof(struct libcdsb_set, root) == offsetof(struct libcdsb_map, root), "Implementation assert");
static_assert(offsetof(struct libcdsb_set, type) == offsetof(struct libcdsb_map, type), "Implementation assert");
extern void libcdsb_mnode_free(mnode_t* x, vtype* t);
#define mnode_empty ((mnode_t*)LIBCDSB_RBTREE_NODE_EMPTY)
#define mnode_create(k, p, c) ((mnode_t*)libcdsb_rbtree_node_create(k, (rbnode_t*)p, c, sizeof(mnode_t)))
@ -37,4 +38,6 @@ static_assert(offsetof(struct libcdsb_set, type) == offsetof(struct libcdsb_map,
#define mnode_is_empty(n) ((n) == mnode_empty)
#define mnode_is_root(n) mnode_is_empty((n)->parent)
#define mnode_free libcdsb_mnode_free
#endif /* LIBCDSB_SRC_MAP_INCLUDE_H */

206
src/rbtree-extra.c Normal file
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@ -0,0 +1,206 @@
/* This software is licensed by the MIT License, see LICENSE file */
/* Copyright © 2022 Gregory Lirent */
#include "__internal/rbtree.h"
/*#####################################################################################################################*/
static rbnode_t* rbnode_duplicate(const rbnode_t* s, rbnode_t* p, const vtype* info) {
return rbnode_create(vnode_duplicate(&s->value, (info) ? *info : VTYPE_POINTER), p, s->colored);
}
static int rbnode_compare(const rbnode_t* s0, const rbnode_t* s1, vtype* tp) {
vtype t = !is_null(tp) ? *tp : VTYPE_POINTER;
return vnode_compare(s0->value, t, s1->value, t);
}
static hash_t rbnode_hash(const rbnode_t* s, vtype* tp) {
vtype t = (!is_null(tp)) ? *tp : VTYPE_POINTER;
return vnode_hash(s->value, t);
}
static void rbnode_free(rbnode_t* x, vtype *t) {
if (!is_null(t)) vnode_free(&x->value, *t);
}
/*#####################################################################################################################*/
hash_t libcdsb_rbtree_hash(const void* s, hash_t (*node_hash)(const void* s, void* info), void* info) {
rbnode_t *c0, *c1;
hash_t hash, v;
stack_t z;
if (rbnode_is_empty(s)) return 0;
if (is_null(node_hash)) node_hash = (void*)rbnode_hash;
z.prev = 0;
hash = 1;
c1 = (void*)s;
if (!rbnode_is_empty(z.value = c1->left)) do {
c0 = stack_pop(&z);
++hash;
if (!rbnode_is_empty(c0->left))
stack_push(&z, c1 = c0->left);
if (!rbnode_is_empty(c0->right))
stack_push(&z, c0->right);
} while (!is_null(z.value));
v = node_hash(c1, info);
c1 = (void*)s;
if (!rbnode_is_empty(z.value = c1->right)) do {
c0 = stack_pop(&z);
++hash;
if (!rbnode_is_empty(c0->left))
stack_push(&z, c1 = c0->left);
if (!rbnode_is_empty(c0->right))
stack_push(&z, c0->right);
} while (!is_null(z.value));
v += node_hash(c1, info);
return hash ^ v;
}
/*#####################################################################################################################*/
void* libcdsb_rbtree_duplicate(const rbnode_t* s, void* (*node_duplicate)(void* src, void* parent, void* info), void* info) {
rbnode_t *p0, *p1, *x;
stack_t z;
z.prev = 0;
z.value = (void*)s;
if (is_null(node_duplicate)) {
node_duplicate = (void*)rbnode_duplicate;
}
if (!rbnode_is_empty(s)) {
x = node_duplicate(z.value, rbnode_empty, info);
stack_push(&z, x);
do {
p0 = stack_pop(&z);
p1 = stack_pop(&z);
if (!rbnode_is_empty(p1->left)) {
p0->left = node_duplicate(p1->left, p0, info);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!rbnode_is_empty(p1->right)) {
p0->right = node_duplicate(p1->right, p0, info);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x = rbnode_empty;
return x;
}
/*#####################################################################################################################*/
int libcdsb_rbtree_compare(const rbnode_t* s0, const rbnode_t* s1, int (*node_compare)(const rbnode_t* s0, const rbnode_t* s1, void* info), void* info) {
rbnode_t *c0, *c1;
stack_t z;
int c = 0;
if (s0 == s1) return 0;
if (is_null(node_compare)) node_compare = (void*)rbnode_compare;
z.prev = 0;
z.value = 0;
stack_push(&z, (void*)s1);
stack_push(&z, (void*)s0);
do {
c0 = stack_pop(&z);
c1 = stack_pop(&z);
if (rbnode_is_empty(c0) || rbnode_is_empty(c1)) {
if (c0 != c1) {
stack_flush(&z);
return rbnode_is_empty(c0) ? -1 : 1;
}
} else if ((c = node_compare(c0, c1, info))) {
if (c0->left == c1->right) { // <-- rbnode_empty
c = node_compare(c0->right, c1, info);
if (!c) c = node_compare(c0, c1->left, info);
} else if (c0->right == c1->left) { // <-- rbnode_empty
c = node_compare(c0, c1->right, info);
if (!c) c = node_compare(c0->left, c1, info);
}
if (c) {
stack_flush(&z);
return c;
}
} else {
stack_push(&z, c1->right);
stack_push(&z, c0->right);
stack_push(&z, c1->left);
stack_push(&z, c0->left);
}
} while (!is_null(z.value));
return 0;
}
size_t libcdsb_rbtree_size(const void* s) {
stack_t z = { .prev = 0, .value = (void*)s };
size_t n = 0;
rbnode_t* c;
if (!rbnode_is_empty(s)) {
while ((c = stack_pop(&z))) {
++n;
if (!rbnode_is_empty(c->left))
stack_push(&z, c->left);
if (!rbnode_is_empty(c->right))
stack_push(&z, c->right);
}
}
return n;
}
void libcdsb_rbtree_free(void* x, void (*node_free)(void* x, void* info), void* info) {
rbnode_t *t, *c;
c = x;
if (is_null(node_free)) node_free = (void*)rbnode_free;
while (!rbnode_is_empty(x)) {
if (!rbnode_is_empty(c->left)) {
c = c->left;
} else if (!rbnode_is_empty(c->right)) {
c = c->right;
} else if (!rbnode_is_root(c)) {
node_free(c, info);
t = c;
c = c->parent;
if (t == c->left) c->left = rbnode_empty;
else c->right = rbnode_empty;
free(t);
} else {
node_free(c, info);
x = rbnode_empty;
}
}
}

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@ -4,6 +4,11 @@
#include "../../include/set.h"
#include "../__internal/rbtree.h"
/*#####################################################################################################################*/
hash_t vset_hash(const set_t* s) {
return rbtree_hash(s->root, nullptr, (void*)&s->type) + VTYPE_SET;
}
void vset_init(set_t* x, vtype t) {
x->root = rbnode_empty;
@ -12,92 +17,48 @@ void vset_init(set_t* x, vtype t) {
void vset_free(set_t* x) {
rbnode_t* t;
rbnode_t* c;
c = x->root;
while (!rbnode_is_empty(x->root)) {
if (!rbnode_is_empty(c->left)) {
c = c->left;
} else if (!rbnode_is_empty(c->right)) {
c = c->right;
} else if (!rbnode_is_root(c)) {
vnode_free(&c->value, x->type);
t = c;
c = c->parent;
if (t == c->left) c->left = rbnode_empty;
else c->right = rbnode_empty;
free(t);
} else {
vnode_free(&c->value, x->type);
x->root = rbnode_empty;
}
}
rbtree_free(x->root, nullptr, &x->type);
x->root = rbnode_empty;
x->type = 0;
}
/*#####################################################################################################################*/
size_t vset_size(const set_t* x) {
stack_t z = { .prev = 0, .value = x->root };
size_t n = 0;
rbnode_t* c;
if (!rbnode_is_empty(x->root)) {
while ((c = stack_pop(&z))) {
++n;
if (!rbnode_is_empty(c->left))
stack_push(&z, c->left);
if (!rbnode_is_empty(c->right))
stack_push(&z, c->right);
}
}
return n;
return rbtree_size(x->root);
}
/*#####################################################################################################################*/
int vset_compare(const set_t* s0, const set_t* s1) {
stack_t z = { .prev = 0, .value = 0 };
vtype t = s0->type;
int c = 0;
if (s0 == s1 || s0->root == s1->root) return 0;
if (s0 == s1) return 0;
if (s0->type != s1->type) return s0->type - s1->type;
stack_push(&z, s1->root);
stack_push(&z, s0->root);
for (rbnode_t *c0, *c1;!is_null(z.value);) {
c0 = stack_pop(&z);
c1 = stack_pop(&z);
if (rbnode_is_empty(c0) || rbnode_is_empty(c1)) {
if (c0 != c1) {
stack_flush(&z);
return rbnode_is_empty(c0) ? -1 : 1;
}
} else if ((c = vnode_compare(c0->value, t, c1->value, t))) {
if (c0->left == c1->right) {
c = vnode_compare(c1->value, t, c0->right->value, t);
if (!c) c = vnode_compare(c1->left->value, t, c0->value, t);
} else if (c0->right == c1->left) {
c = vnode_compare(c0->value, t, c1->right->value, t);
if (!c) c = vnode_compare(c0->left->value, t, c1->value, t);
}
if (c) { stack_flush(&z); return c; }
} else {
stack_push(&z, c1->right);
stack_push(&z, c0->right);
stack_push(&z, c1->left);
stack_push(&z, c0->left);
}
}
return 0;
return rbtree_compare(s0->root, s1->root, nullptr, (void*)&s0->type);
}
/*#####################################################################################################################*/
set_t vset_copy(const set_t* s) {
set_t x;
x.type = s->type;
x.root = rbtree_duplicate(s->root, nullptr, &x.type);
return x;
}
set_t* vset_duplicate(const set_t* s) {
set_t *x = malloc(sizeof(*x));
x->type = s->type;
x->root = rbtree_duplicate(s->root, nullptr, &x->type);
return x;
}
void vset_copy_init(set_t* x, const set_t* s) {
x->type = s->type;
x->root = rbtree_duplicate(s->root, nullptr, &x->type);
}

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@ -1,103 +0,0 @@
/* This software is licensed by the MIT License, see LICENSE file */
/* Copyright © 2022 Gregory Lirent */
#include "../../include/set.h"
#include "../__internal/rbtree.h"
set_t vset_copy(const set_t* s) {
set_t x = { .type = s->type };
stack_t z = { .prev = 0, .value = s->root };
vtype t = s->type;
if (!rbnode_is_empty(s->root)) {
x.root = rbnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x.root);
do {
rbnode_t *p0 = stack_pop(&z);
rbnode_t *p1 = stack_pop(&z);
if (!rbnode_is_empty(p1->left)) {
p0->left = rbnode_create(vnode_duplicate(&p1->left->value, t), p0, p1->left->colored);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!rbnode_is_empty(p1->right)) {
p0->right = rbnode_create(vnode_duplicate(&p1->right->value, t), p0, p1->right->colored);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x.root = rbnode_empty;
return x;
}
set_t* vset_duplicate(const set_t* s) {
set_t* x = malloc(sizeof(*x));
stack_t z = { .prev = 0, .value = s->root };
vtype t = x->type = s->type;
if (!rbnode_is_empty(s->root)) {
x->root = rbnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x->root);
do {
rbnode_t *p0 = stack_pop(&z);
rbnode_t *p1 = stack_pop(&z);
if (!rbnode_is_empty(p1->left)) {
p0->left = rbnode_create(vnode_duplicate(&p1->left->value, t), p0, p1->left->colored);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!rbnode_is_empty(p1->right)) {
p0->right = rbnode_create(vnode_duplicate(&p1->right->value, t), p0, p1->right->colored);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x->root = rbnode_empty;
return x;
}
void vset_copy_init(set_t* x, const set_t* s) {
stack_t z = { .prev = 0, .value = s->root };
vtype t = x->type = s->type;
if (!rbnode_is_empty(s->root)) {
x->root = rbnode_create(vnode_duplicate(&s->root->value, t), rbnode_empty, 0);
stack_push(&z, x->root);
do {
rbnode_t *p0 = stack_pop(&z);
rbnode_t *p1 = stack_pop(&z);
if (!rbnode_is_empty(p1->left)) {
p0->left = rbnode_create(vnode_duplicate(&p1->left->value, t), p0, p1->left->colored);
stack_push(&z, p1->left);
stack_push(&z, p0->left);
}
if (!rbnode_is_empty(p1->right)) {
p0->right = rbnode_create(vnode_duplicate(&p1->right->value, t), p0, p1->right->colored);
stack_push(&z, p1->right);
stack_push(&z, p0->right);
}
} while (!is_null(z.value));
} else x->root = rbnode_empty;
}