652 lines
20 KiB
C
652 lines
20 KiB
C
/*
|
|
* $Id$
|
|
*
|
|
Copyright (c) 2006-2020 Chung, Hyung-Hwan. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. 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.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 THE AUTHOR 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 _HAWK_RBT_H_
|
|
#define _HAWK_RBT_H_
|
|
|
|
#include <hawk-cmn.h>
|
|
|
|
/** \file
|
|
* This file provides a red-black tree encapsulated in the #hawk_rbt_t type that
|
|
* implements a self-balancing binary search tree.Its interface is very close
|
|
* to #hawk_htb_t.
|
|
*
|
|
* This sample code adds a series of keys and values and print them
|
|
* in descending key order.
|
|
* \code
|
|
* #include <hawk-rbt.h>
|
|
*
|
|
* static hawk_rbt_walk_t walk (hawk_rbt_t* rbt, hawk_rbt_pair_t* pair, void* ctx)
|
|
* {
|
|
* hawk_printf (HAWK_T("key = %d, value = %d\n"),
|
|
* *(int*)HAWK_RBT_KPTR(pair), *(int*)HAWK_RBT_VPTR(pair));
|
|
* return HAWK_RBT_WALK_FORWARD;
|
|
* }
|
|
*
|
|
* int main ()
|
|
* {
|
|
* hawk_rbt_t* s1;
|
|
* int i;
|
|
*
|
|
* s1 = hawk_rbt_open (HAWK_MMGR_GETDFL(), 0, 1, 1); // error handling skipped
|
|
* hawk_rbt_setstyle (s1, hawk_get_rbt_style(HAWK_RBT_STYLE_INLINE_COPIERS));
|
|
*
|
|
* for (i = 0; i < 20; i++)
|
|
* {
|
|
* int x = i * 20;
|
|
* hawk_rbt_insert (s1, &i, HAWK_SIZEOF(i), &x, HAWK_SIZEOF(x)); // eror handling skipped
|
|
* }
|
|
*
|
|
* hawk_rbt_rwalk (s1, walk, HAWK_NULL);
|
|
*
|
|
* hawk_rbt_close (s1);
|
|
* return 0;
|
|
* }
|
|
* \endcode
|
|
*/
|
|
|
|
typedef struct hawk_rbt_t hawk_rbt_t;
|
|
typedef struct hawk_rbt_pair_t hawk_rbt_pair_t;
|
|
|
|
/**
|
|
* The hawk_rbt_walk_t type defines values that the callback function can
|
|
* return to control hawk_rbt_walk() and hawk_rbt_rwalk().
|
|
*/
|
|
enum hawk_rbt_walk_t
|
|
{
|
|
HAWK_RBT_WALK_STOP = 0,
|
|
HAWK_RBT_WALK_FORWARD = 1
|
|
};
|
|
typedef enum hawk_rbt_walk_t hawk_rbt_walk_t;
|
|
|
|
/**
|
|
* The hawk_rbt_id_t type defines IDs to indicate a key or a value in various
|
|
* functions
|
|
*/
|
|
enum hawk_rbt_id_t
|
|
{
|
|
HAWK_RBT_KEY = 0, /**< indicate a key */
|
|
HAWK_RBT_VAL = 1 /**< indicate a value */
|
|
};
|
|
typedef enum hawk_rbt_id_t hawk_rbt_id_t;
|
|
|
|
/**
|
|
* The hawk_rbt_copier_t type defines a pair contruction callback.
|
|
*/
|
|
typedef void* (*hawk_rbt_copier_t) (
|
|
hawk_rbt_t* rbt /**< red-black tree */,
|
|
void* dptr /**< pointer to a key or a value */,
|
|
hawk_oow_t dlen /**< length of a key or a value */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_freeer_t defines a key/value destruction callback.
|
|
*/
|
|
typedef void (*hawk_rbt_freeer_t) (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* dptr, /**< pointer to a key or a value */
|
|
hawk_oow_t dlen /**< length of a key or a value */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_comper_t type defines a key comparator that is called when
|
|
* the rbt needs to compare keys. A red-black tree is created with a default
|
|
* comparator which performs bitwise comparison of two keys.
|
|
* The comparator should return 0 if the keys are the same, 1 if the first
|
|
* key is greater than the second key, -1 otherwise.
|
|
*/
|
|
typedef int (*hawk_rbt_comper_t) (
|
|
const hawk_rbt_t* rbt, /**< red-black tree */
|
|
const void* kptr1, /**< key pointer */
|
|
hawk_oow_t klen1, /**< key length */
|
|
const void* kptr2, /**< key pointer */
|
|
hawk_oow_t klen2 /**< key length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_keeper_t type defines a value keeper that is called when
|
|
* a value is retained in the context that it should be destroyed because
|
|
* it is identical to a new value. Two values are identical if their
|
|
* pointers and lengths are equal.
|
|
*/
|
|
typedef void (*hawk_rbt_keeper_t) (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* vptr, /**< value pointer */
|
|
hawk_oow_t vlen /**< value length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_walker_t defines a pair visitor.
|
|
*/
|
|
typedef hawk_rbt_walk_t (*hawk_rbt_walker_t) (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
hawk_rbt_pair_t* pair, /**< pointer to a key/value pair */
|
|
void* ctx /**< pointer to user-defined data */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_cbserter_t type defines a callback function for hawk_rbt_cbsert().
|
|
* The hawk_rbt_cbserter() function calls it to allocate a new pair for the
|
|
* key pointed to by \a kptr of the length \a klen and the callback context
|
|
* \a ctx. The second parameter \a pair is passed the pointer to the existing
|
|
* pair for the key or #HAWK_NULL in case of no existing key. The callback
|
|
* must return a pointer to a new or a reallocated pair. When reallocating the
|
|
* existing pair, this callback must destroy the existing pair and return the
|
|
* newly reallocated pair. It must return #HAWK_NULL for failure.
|
|
*/
|
|
typedef hawk_rbt_pair_t* (*hawk_rbt_cbserter_t) (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
hawk_rbt_pair_t* pair, /**< pair pointer */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
void* ctx /**< callback context */
|
|
);
|
|
|
|
enum hawk_rbt_pair_color_t
|
|
{
|
|
HAWK_RBT_RED,
|
|
HAWK_RBT_BLACK
|
|
};
|
|
typedef enum hawk_rbt_pair_color_t hawk_rbt_pair_color_t;
|
|
|
|
/**
|
|
* The hawk_rbt_pair_t type defines red-black tree pair. A pair is composed
|
|
* of a key and a value. It maintains pointers to the beginning of a key and
|
|
* a value plus their length. The length is scaled down with the scale factor
|
|
* specified in an owning tree. Use macros defined in the
|
|
*/
|
|
struct hawk_rbt_pair_t
|
|
{
|
|
struct
|
|
{
|
|
void* ptr;
|
|
hawk_oow_t len;
|
|
} key;
|
|
|
|
struct
|
|
{
|
|
void* ptr;
|
|
hawk_oow_t len;
|
|
} val;
|
|
|
|
/* management information below */
|
|
hawk_rbt_pair_color_t color;
|
|
hawk_rbt_pair_t* parent;
|
|
hawk_rbt_pair_t* child[2]; /* left and right */
|
|
};
|
|
|
|
typedef struct hawk_rbt_style_t hawk_rbt_style_t;
|
|
|
|
/**
|
|
* The hawk_rbt_style_t type defines callback function sets for key/value
|
|
* pair manipulation.
|
|
*/
|
|
struct hawk_rbt_style_t
|
|
{
|
|
hawk_rbt_copier_t copier[2]; /**< key and value copier */
|
|
hawk_rbt_freeer_t freeer[2]; /**< key and value freeer */
|
|
hawk_rbt_comper_t comper; /**< key comparator */
|
|
hawk_rbt_keeper_t keeper; /**< value keeper */
|
|
};
|
|
|
|
/**
|
|
* The hawk_rbt_style_kind_t type defines the type of predefined
|
|
* callback set for pair manipulation.
|
|
*/
|
|
enum hawk_rbt_style_kind_t
|
|
{
|
|
/** store the key and the value pointer */
|
|
HAWK_RBT_STYLE_DEFAULT,
|
|
/** copy both key and value into the pair */
|
|
HAWK_RBT_STYLE_INLINE_COPIERS,
|
|
/** copy the key into the pair but store the value pointer */
|
|
HAWK_RBT_STYLE_INLINE_KEY_COPIER,
|
|
/** copy the value into the pair but store the key pointer */
|
|
HAWK_RBT_STYLE_INLINE_VALUE_COPIER
|
|
};
|
|
|
|
typedef enum hawk_rbt_style_kind_t hawk_rbt_style_kind_t;
|
|
|
|
typedef struct hawk_rbt_itr_t hawk_rbt_itr_t;
|
|
struct hawk_rbt_itr_t
|
|
{
|
|
hawk_rbt_pair_t* pair;
|
|
hawk_rbt_pair_t* _prev;
|
|
unsigned int _dir: 1; /* 0 or 1 */
|
|
unsigned int _state: 8;
|
|
#if defined(HAWK_ENABLE_RBT_ITR_PROTECTION)
|
|
unsigned int _prot_updated: 1;
|
|
hawk_oow_t _prot_seqno;
|
|
hawk_rbt_itr_t* _prot_prev;
|
|
hawk_rbt_itr_t* _prot_next;
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* The hawk_rbt_t type defines a red-black tree.
|
|
*/
|
|
struct hawk_rbt_t
|
|
{
|
|
hawk_gem_t* gem;
|
|
const hawk_rbt_style_t* style;
|
|
hawk_oob_t scale[2]; /**< length scale */
|
|
hawk_rbt_pair_t xnil; /**< internal nil node */
|
|
hawk_oow_t size; /**< number of pairs */
|
|
hawk_rbt_pair_t* root; /**< root pair */
|
|
#if defined(HAWK_ENABLE_RBT_ITR_PROTECTION)
|
|
hawk_rbt_itr_t _prot_itr; /**< protected iterators */
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* The HAWK_RBT_COPIER_SIMPLE macros defines a copier that remembers the
|
|
* pointer and length of data in a pair.
|
|
*/
|
|
#define HAWK_RBT_COPIER_SIMPLE ((hawk_rbt_copier_t)1)
|
|
|
|
/**
|
|
* The HAWK_RBT_COPIER_INLINE macros defines a copier that copies data into
|
|
* a pair.
|
|
*/
|
|
#define HAWK_RBT_COPIER_INLINE ((hawk_rbt_copier_t)2)
|
|
|
|
#define HAWK_RBT_COPIER_DEFAULT (HAWK_RBT_COPIER_SIMPLE)
|
|
#define HAWK_RBT_FREEER_DEFAULT (HAWK_NULL)
|
|
#define HAWK_RBT_COMPER_DEFAULT (hawk_rbt_dflcomp)
|
|
#define HAWK_RBT_KEEPER_DEFAULT (HAWK_NULL)
|
|
|
|
/**
|
|
* The HAWK_RBT_SIZE() macro returns the number of pairs in red-black tree.
|
|
*/
|
|
#define HAWK_RBT_SIZE(m) ((const hawk_oow_t)(m)->size)
|
|
#define HAWK_RBT_KSCALE(m) ((const int)(m)->scale[HAWK_RBT_KEY])
|
|
#define HAWK_RBT_VSCALE(m) ((const int)(m)->scale[HAWK_RBT_VAL])
|
|
|
|
#define HAWK_RBT_KPTL(p) (&(p)->key)
|
|
#define HAWK_RBT_VPTL(p) (&(p)->val)
|
|
|
|
#define HAWK_RBT_KPTR(p) ((p)->key.ptr)
|
|
#define HAWK_RBT_KLEN(p) ((p)->key.len)
|
|
#define HAWK_RBT_VPTR(p) ((p)->val.ptr)
|
|
#define HAWK_RBT_VLEN(p) ((p)->val.len)
|
|
|
|
#define HAWK_RBT_NEXT(p) ((p)->next)
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* The hawk_get_rbt_style() functions returns a predefined callback set for
|
|
* pair manipulation.
|
|
*/
|
|
HAWK_EXPORT const hawk_rbt_style_t* hawk_get_rbt_style (
|
|
hawk_rbt_style_kind_t kind
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_open() function creates a red-black tree.
|
|
* \return hawk_rbt_t pointer on success, HAWK_NULL on failure.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_t* hawk_rbt_open (
|
|
hawk_gem_t* gem,
|
|
hawk_oow_t xtnsize, /**< extension size in bytes */
|
|
int kscale, /**< key scale */
|
|
int vscale /**< value scale */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_close() function destroys a red-black tree.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_close (
|
|
hawk_rbt_t* rbt /**< red-black tree */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_init() function initializes a red-black tree
|
|
*/
|
|
HAWK_EXPORT int hawk_rbt_init (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
hawk_gem_t* gem,
|
|
int kscale, /**< key scale */
|
|
int vscale /**< value scale */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_fini() funtion finalizes a red-black tree
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_fini (
|
|
hawk_rbt_t* rbt /**< red-black tree */
|
|
);
|
|
|
|
#if defined(HAWK_HAVE_INLINE)
|
|
static HAWK_INLINE void* hawk_rbt_getxtn (hawk_rbt_t* rbt) { return (void*)(rbt + 1); }
|
|
#else
|
|
#define hawk_rbt_getxtn(rbt) ((void*)((hawk_rbt_t*)(rbt) + 1))
|
|
#endif
|
|
|
|
/**
|
|
* The hawk_rbt_getstyle() function gets manipulation callback function set.
|
|
*/
|
|
HAWK_EXPORT const hawk_rbt_style_t* hawk_rbt_getstyle (
|
|
const hawk_rbt_t* rbt /**< red-black tree */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_setstyle() function sets internal manipulation callback
|
|
* functions for data construction, destruction, comparison, etc.
|
|
* The callback structure pointed to by \a style must outlive the tree
|
|
* pointed to by \a htb as the tree doesn't copy the contents of the
|
|
* structure.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_setstyle (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
const hawk_rbt_style_t* style /**< callback function set */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_getsize() function gets the number of pairs in red-black tree.
|
|
*/
|
|
HAWK_EXPORT hawk_oow_t hawk_rbt_getsize (
|
|
const hawk_rbt_t* rbt /**< red-black tree */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_search() function searches red-black tree to find a pair with a
|
|
* matching key. It returns the pointer to the pair found. If it fails
|
|
* to find one, it returns HAWK_NULL.
|
|
* \return pointer to the pair with a maching key,
|
|
* or HAWK_NULL if no match is found.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_search (
|
|
const hawk_rbt_t* rbt, /**< red-black tree */
|
|
const void* kptr, /**< key pointer */
|
|
hawk_oow_t klen /**< the size of the key */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_upsert() function searches red-black tree for the pair with a
|
|
* matching key. If one is found, it updates the pair. Otherwise, it inserts
|
|
* a new pair with the key and the value given. It returns the pointer to the
|
|
* pair updated or inserted.
|
|
* \return a pointer to the updated or inserted pair on success,
|
|
* HAWK_NULL on failure.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_upsert (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
void* vptr, /**< value pointer */
|
|
hawk_oow_t vlen /**< value length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_ensert() function inserts a new pair with the key and the value
|
|
* given. If there exists a pair with the key given, the function returns
|
|
* the pair containing the key.
|
|
* \return pointer to a pair on success, HAWK_NULL on failure.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_ensert (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
void* vptr, /**< value pointer */
|
|
hawk_oow_t vlen /**< value length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_insert() function inserts a new pair with the key and the value
|
|
* given. If there exists a pair with the key given, the function returns
|
|
* HAWK_NULL without channging the value.
|
|
* \return pointer to the pair created on success, HAWK_NULL on failure.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_insert (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
void* vptr, /**< value pointer */
|
|
hawk_oow_t vlen /**< value length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_update() function updates the value of an existing pair
|
|
* with a matching key.
|
|
* \return pointer to the pair on success, HAWK_NULL on no matching pair
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_update (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
void* vptr, /**< value pointer */
|
|
hawk_oow_t vlen /**< value length */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_cbsert() function inserts a key/value pair by delegating pair
|
|
* allocation to a callback function. Depending on the callback function,
|
|
* it may behave like hawk_rbt_insert(), hawk_rbt_upsert(), hawk_rbt_update(),
|
|
* hawk_rbt_ensert(), or totally differently. The sample code below inserts
|
|
* a new pair if the key is not found and appends the new value to the
|
|
* existing value delimited by a comma if the key is found.
|
|
*
|
|
* \code
|
|
* hawk_rbt_walk_t print_map_pair (hawk_rbt_t* map, hawk_rbt_pair_t* pair, void* ctx)
|
|
* {
|
|
* hawk_printf (HAWK_T("%.*s[%d] => %.*s[%d]\n"),
|
|
* HAWK_RBT_KLEN(pair), HAWK_RBT_KPTR(pair), (int)HAWK_RBT_KLEN(pair),
|
|
* HAWK_RBT_VLEN(pair), HAWK_RBT_VPTR(pair), (int)HAWK_RBT_VLEN(pair));
|
|
* return HAWK_RBT_WALK_FORWARD;
|
|
* }
|
|
*
|
|
* hawk_rbt_pair_t* cbserter (
|
|
* hawk_rbt_t* rbt, hawk_rbt_pair_t* pair,
|
|
* void* kptr, hawk_oow_t klen, void* ctx)
|
|
* {
|
|
* hawk_cstr_t* v = (hawk_cstr_t*)ctx;
|
|
* if (pair == HAWK_NULL)
|
|
* {
|
|
* // no existing key for the key
|
|
* return hawk_rbt_allocpair (rbt, kptr, klen, v->ptr, v->len);
|
|
* }
|
|
* else
|
|
* {
|
|
* // a pair with the key exists.
|
|
* // in this sample, i will append the new value to the old value
|
|
* // separated by a comma
|
|
* hawk_rbt_pair_t* new_pair;
|
|
* hawk_ooch_t comma = HAWK_T(',');
|
|
* hawk_oob_t* vptr;
|
|
*
|
|
* // allocate a new pair, but without filling the actual value.
|
|
* // note vptr is given HAWK_NULL for that purpose
|
|
* new_pair = hawk_rbt_allocpair (
|
|
* rbt, kptr, klen, HAWK_NULL, pair->vlen + 1 + v->len);
|
|
* if (new_pair == HAWK_NULL) return HAWK_NULL;
|
|
*
|
|
* // fill in the value space
|
|
* vptr = new_pair->vptr;
|
|
* hawk_memcpy (vptr, pair->vptr, pair->vlen*HAWK_SIZEOF(hawk_ooch_t));
|
|
* vptr += pair->vlen*HAWK_SIZEOF(hawk_ooch_t);
|
|
* hawk_memcpy (vptr, &comma, HAWK_SIZEOF(hawk_ooch_t));
|
|
* vptr += HAWK_SIZEOF(hawk_ooch_t);
|
|
* hawk_memcpy (vptr, v->ptr, v->len*HAWK_SIZEOF(hawk_ooch_t));
|
|
*
|
|
* // this callback requires the old pair to be destroyed
|
|
* hawk_rbt_freepair (rbt, pair);
|
|
*
|
|
* // return the new pair
|
|
* return new_pair;
|
|
* }
|
|
* }
|
|
*
|
|
* int main ()
|
|
* {
|
|
* hawk_rbt_t* s1;
|
|
* int i;
|
|
* hawk_ooch_t* keys[] = { HAWK_T("one"), HAWK_T("two"), HAWK_T("three") };
|
|
* hawk_ooch_t* vals[] = { HAWK_T("1"), HAWK_T("2"), HAWK_T("3"), HAWK_T("4"), HAWK_T("5") };
|
|
*
|
|
* s1 = hawk_rbt_open (
|
|
* HAWK_MMGR_GETDFL(), 0,
|
|
* HAWK_SIZEOF(hawk_ooch_t), HAWK_SIZEOF(hawk_ooch_t)
|
|
* ); // note error check is skipped
|
|
* hawk_rbt_setstyle (s1, &style1);
|
|
*
|
|
* for (i = 0; i < HAWK_COUNTOF(vals); i++)
|
|
* {
|
|
* hawk_cstr_t ctx;
|
|
* ctx.ptr = vals[i]; ctx.len = hawk_count_oocstr(vals[i]);
|
|
* hawk_rbt_cbsert (s1,
|
|
* keys[i%HAWK_COUNTOF(keys)], hawk_count_oocstr(keys[i%HAWK_COUNTOF(keys)]),
|
|
* cbserter, &ctx
|
|
* ); // note error check is skipped
|
|
* }
|
|
* hawk_rbt_walk (s1, print_map_pair, HAWK_NULL);
|
|
*
|
|
* hawk_rbt_close (s1);
|
|
* return 0;
|
|
* }
|
|
* \endcode
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_cbsert (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
void* kptr, /**< key pointer */
|
|
hawk_oow_t klen, /**< key length */
|
|
hawk_rbt_cbserter_t cbserter, /**< callback function */
|
|
void* ctx /**< callback context */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_delete() function deletes a pair with a matching key
|
|
* \return 0 on success, -1 on failure
|
|
*/
|
|
HAWK_EXPORT int hawk_rbt_delete (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
const void* kptr, /**< key pointer */
|
|
hawk_oow_t klen /**< key size */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_clear() function empties a red-black tree.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_clear (
|
|
hawk_rbt_t* rbt /**< red-black tree */
|
|
);
|
|
|
|
HAWK_EXPORT void hawk_init_rbt_itr (
|
|
hawk_rbt_itr_t* itr,
|
|
int dir /* 0 or 1 */
|
|
);
|
|
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_getfirstpair (
|
|
hawk_rbt_t* rbt,
|
|
hawk_rbt_itr_t* itr
|
|
);
|
|
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_getnextpair (
|
|
hawk_rbt_t* rbt,
|
|
hawk_rbt_itr_t* itr
|
|
);
|
|
|
|
#if defined(HAWK_ENABLE_RBT_ITR_PROTECTION)
|
|
HAWK_EXPORT void hawk_rbt_protectitr (
|
|
hawk_rbt_t* rbt,
|
|
hawk_rbt_itr_t* itr
|
|
);
|
|
|
|
HAWK_EXPORT void hawk_rbt_unprotectitr (
|
|
hawk_rbt_t* rbt,
|
|
hawk_rbt_itr_t* itr
|
|
);
|
|
#endif
|
|
|
|
/**
|
|
* The hawk_rbt_walk() function traverses a red-black tree in preorder
|
|
* from the leftmost child.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_walk (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
hawk_rbt_walker_t walker, /**< callback function for each pair */
|
|
void* ctx /**< pointer to user-specific data */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_walk() function traverses a red-black tree in preorder
|
|
* from the rightmost child.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_rwalk (
|
|
hawk_rbt_t* rbt, /**< red-black tree */
|
|
hawk_rbt_walker_t walker, /**< callback function for each pair */
|
|
void* ctx /**< pointer to user-specific data */
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_allocpair() function allocates a pair for a key and a value
|
|
* given. But it does not chain the pair allocated into the red-black tree \a rbt.
|
|
* Use this function at your own risk.
|
|
*
|
|
* Take note of he following special behavior when the copier is
|
|
* #HAWK_RBT_COPIER_INLINE.
|
|
* - If \a kptr is #HAWK_NULL, the key space of the size \a klen is reserved but
|
|
* not propagated with any data.
|
|
* - If \a vptr is #HAWK_NULL, the value space of the size \a vlen is reserved
|
|
* but not propagated with any data.
|
|
*/
|
|
HAWK_EXPORT hawk_rbt_pair_t* hawk_rbt_allocpair (
|
|
hawk_rbt_t* rbt,
|
|
void* kptr,
|
|
hawk_oow_t klen,
|
|
void* vptr,
|
|
hawk_oow_t vlen
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_freepair() function destroys a pair. But it does not detach
|
|
* the pair destroyed from the red-black tree \a rbt. Use this function at your
|
|
* own risk.
|
|
*/
|
|
HAWK_EXPORT void hawk_rbt_freepair (
|
|
hawk_rbt_t* rbt,
|
|
hawk_rbt_pair_t* pair
|
|
);
|
|
|
|
/**
|
|
* The hawk_rbt_dflcomp() function defines the default key comparator.
|
|
*/
|
|
HAWK_EXPORT int hawk_rbt_dflcomp (
|
|
const hawk_rbt_t* rbt,
|
|
const void* kptr1,
|
|
hawk_oow_t klen1,
|
|
const void* kptr2,
|
|
hawk_oow_t klen2
|
|
);
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|