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/*
This file is part of tgl-library
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Copyright Vitaly Valtman 2013-2014
*/
#ifndef __TREE_H__
#define __TREE_H__
#include <stdio.h>
#include <memory.h>
#include <assert.h>
#pragma pack(push,4)
#define DEFINE_TREE(X_NAME, X_TYPE, X_CMP, X_UNSET) \
struct tree_ ## X_NAME { \
struct tree_ ## X_NAME *left, *right;\
X_TYPE x;\
int y;\
};\
\
static struct tree_ ## X_NAME *new_tree_node_ ## X_NAME (X_TYPE x, int y) {\
struct tree_ ## X_NAME *T = malloc (sizeof (*T));\
T->x = x;\
T->y = y;\
T->left = T->right = 0;\
return T;\
}\
\
static void delete_tree_node_ ## X_NAME (struct tree_ ## X_NAME *T) {\
free (T);\
}\
\
static void tree_split_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x, struct tree_ ## X_NAME **L, struct tree_ ## X_NAME **R) {\
if (!T) {\
*L = *R = 0;\
} else {\
int c = X_CMP (x, T->x);\
if (c < 0) {\
tree_split_ ## X_NAME (T->left, x, L, &T->left);\
*R = T;\
} else {\
tree_split_ ## X_NAME (T->right, x, &T->right, R);\
*L = T;\
}\
}\
}\
\
static struct tree_ ## X_NAME *tree_insert_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x, int y) __attribute__ ((warn_unused_result,unused));\
static struct tree_ ## X_NAME *tree_insert_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x, int y) {\
if (!T) {\
return new_tree_node_ ## X_NAME (x, y);\
} else {\
if (y > T->y) {\
struct tree_ ## X_NAME *N = new_tree_node_ ## X_NAME (x, y);\
tree_split_ ## X_NAME (T, x, &N->left, &N->right);\
return N;\
} else {\
int c = X_CMP (x, T->x);\
assert (c);\
if (c < 0) { \
T->left = tree_insert_ ## X_NAME (T->left, x, y);\
} else { \
T->right = tree_insert_ ## X_NAME (T->right, x, y);\
} \
return T; \
}\
}\
}\
\
static struct tree_ ## X_NAME *tree_merge_ ## X_NAME (struct tree_ ## X_NAME *L, struct tree_ ## X_NAME *R) {\
if (!L || !R) {\
return L ? L : R;\
} else {\
if (L->y > R->y) {\
L->right = tree_merge_ ## X_NAME (L->right, R);\
return L;\
} else {\
R->left = tree_merge_ ## X_NAME (L, R->left);\
return R;\
}\
}\
}\
\
static struct tree_ ## X_NAME *tree_delete_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x) __attribute__ ((warn_unused_result,unused));\
static struct tree_ ## X_NAME *tree_delete_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x) {\
assert (T);\
int c = X_CMP (x, T->x);\
if (!c) {\
struct tree_ ## X_NAME *N = tree_merge_ ## X_NAME (T->left, T->right);\
delete_tree_node_ ## X_NAME (T);\
return N;\
} else {\
if (c < 0) { \
T->left = tree_delete_ ## X_NAME (T->left, x); \
} else { \
T->right = tree_delete_ ## X_NAME (T->right, x); \
} \
return T; \
}\
}\
\
static X_TYPE tree_get_min_ ## X_NAME (struct tree_ ## X_NAME *t) __attribute__ ((unused));\
static X_TYPE tree_get_min_ ## X_NAME (struct tree_ ## X_NAME *T) {\
if (!T) { return X_UNSET; } \
while (T->left) { T = T->left; }\
return T->x; \
} \
\
static X_TYPE tree_lookup_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x) __attribute__ ((unused));\
static X_TYPE tree_lookup_ ## X_NAME (struct tree_ ## X_NAME *T, X_TYPE x) {\
int c;\
while (T && (c = X_CMP (x, T->x))) {\
T = (c < 0 ? T->left : T->right);\
}\
return T ? T->x : X_UNSET;\
}\
\
static void tree_act_ ## X_NAME (struct tree_ ## X_NAME *T, void (*act)(X_TYPE)) __attribute__ ((unused));\
static void tree_act_ ## X_NAME (struct tree_ ## X_NAME *T, void (*act)(X_TYPE)) {\
if (!T) { return; } \
tree_act_ ## X_NAME (T->left, act); \
act (T->x); \
tree_act_ ## X_NAME (T->right, act); \
}\
\
static void tree_act_ex_ ## X_NAME (struct tree_ ## X_NAME *T, void (*act)(X_TYPE, void *), void *extra) __attribute__ ((unused));\
static void tree_act_ex_ ## X_NAME (struct tree_ ## X_NAME *T, void (*act)(X_TYPE, void *), void *extra) {\
if (!T) { return; } \
tree_act_ex_ ## X_NAME (T->left, act, extra); \
act (T->x, extra); \
tree_act_ex_ ## X_NAME (T->right, act, extra); \
}\
\
static int tree_count_ ## X_NAME (struct tree_ ## X_NAME *T) __attribute__ ((unused));\
static int tree_count_ ## X_NAME (struct tree_ ## X_NAME *T) { \
if (!T) { return 0; }\
return 1 + tree_count_ ## X_NAME (T->left) + tree_count_ ## X_NAME (T->right); \
}\
static void tree_check_ ## X_NAME (struct tree_ ## X_NAME *T) __attribute__ ((unused));\
static void tree_check_ ## X_NAME (struct tree_ ## X_NAME *T) { \
if (!T) { return; }\
if (T->left) { \
assert (T->left->y <= T->y);\
assert (X_CMP (T->left->x, T->x) < 0); \
}\
if (T->right) { \
assert (T->right->y <= T->y);\
assert (X_CMP (T->right->x, T->x) > 0); \
}\
tree_check_ ## X_NAME (T->left); \
tree_check_ ## X_NAME (T->right); \
}\
static struct tree_ ## X_NAME *tree_clear_ ## X_NAME (struct tree_ ## X_NAME *T) __attribute__ ((unused));\
static struct tree_ ## X_NAME *tree_clear_ ## X_NAME (struct tree_ ## X_NAME *T) { \
if (!T) { return 0; }\
tree_clear_ ## X_NAME (T->left); \
tree_clear_ ## X_NAME (T->right); \
delete_tree_node_ ## X_NAME (T); \
return 0; \
} \
#define int_cmp(a,b) ((a) - (b))
#pragma pack(pop)
#endif
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