mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-23 16:09:47 +00:00
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
|
|
*
|
|
* ---------------------------------------------------------------------------------------
|
|
* The following license statement only applies to this file (bintree.c).
|
|
* ---------------------------------------------------------------------------------------
|
|
*
|
|
* Permission is hereby granted, free of charge,
|
|
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <retro_inline.h>
|
|
|
|
#include "bintree.h"
|
|
|
|
static void * const NIL_NODE = (void*)&NIL_NODE;
|
|
|
|
static struct bintree_node *bintree_new_nil_node(
|
|
struct bintree_node *parent)
|
|
{
|
|
struct bintree_node *node = (struct bintree_node *)
|
|
malloc(sizeof(struct bintree_node));
|
|
|
|
if (!node)
|
|
return NULL;
|
|
|
|
node->value = NIL_NODE;
|
|
node->parent = parent;
|
|
node->left = NULL;
|
|
node->right = NULL;
|
|
|
|
return node;
|
|
}
|
|
|
|
int bintree_insert(bintree_t *t, struct bintree_node *root, void *value)
|
|
{
|
|
int cmp_res = 0;
|
|
|
|
if (!root || (root->value == NIL_NODE))
|
|
{
|
|
root->left = bintree_new_nil_node(root);
|
|
root->right = bintree_new_nil_node(root);
|
|
root->value = value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
cmp_res = t->cmp(root->value, value, t->ctx);
|
|
|
|
if (cmp_res > 0)
|
|
return bintree_insert(t, root->left, value);
|
|
else if (cmp_res < 0)
|
|
return bintree_insert(t, root->right, value);
|
|
return -1;
|
|
}
|
|
|
|
int bintree_iterate(struct bintree_node *n, bintree_iter_cb cb, void *ctx)
|
|
{
|
|
int rv;
|
|
|
|
if (!n || (n->value == NIL_NODE))
|
|
return 0;
|
|
|
|
if ((rv = bintree_iterate(n->left, cb, ctx)) != 0)
|
|
return rv;
|
|
if ((rv = cb(n->value, ctx)) != 0)
|
|
return rv;
|
|
if ((rv = bintree_iterate(n->right, cb, ctx)) != 0)
|
|
return rv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bintree_free(struct bintree_node *n)
|
|
{
|
|
if (!n)
|
|
return;
|
|
if (n->value != NIL_NODE)
|
|
{
|
|
n->value = NULL;
|
|
if (n->left)
|
|
bintree_free(n->left);
|
|
if (n->right)
|
|
bintree_free(n->right);
|
|
}
|
|
free(n);
|
|
}
|
|
|
|
bintree_t *bintree_new(bintree_cmp_func cmp, void *ctx)
|
|
{
|
|
bintree_t *t = (bintree_t*)malloc(sizeof(*t));
|
|
|
|
if (!t)
|
|
return NULL;
|
|
|
|
t->root = bintree_new_nil_node(NULL);
|
|
t->cmp = cmp;
|
|
t->ctx = ctx;
|
|
|
|
return t;
|
|
}
|