Navid Nikaein
1ca500d264
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5576 818b1a75-f10b-46b9-bf7c-635c3b92a50f
174 lines
4.4 KiB
C
174 lines
4.4 KiB
C
/*******************************************************************************
|
|
|
|
Eurecom OpenAirInterface
|
|
Copyright(c) 1999 - 2011 Eurecom
|
|
|
|
This program is free software; you can redistribute it and/or modify it
|
|
under the terms and conditions of the GNU General Public License,
|
|
version 2, as published by the Free Software Foundation.
|
|
|
|
This program is distributed in the hope it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
The full GNU General Public License is included in this distribution in
|
|
the file called "COPYING".
|
|
|
|
Contact Information
|
|
Openair Admin: openair_admin@eurecom.fr
|
|
Openair Tech : openair_tech@eurecom.fr
|
|
Forums : http://forums.eurecom.fsr/openairinterface
|
|
Address : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France
|
|
|
|
*******************************************************************************/
|
|
|
|
/*! \file trace_hashtable.h
|
|
* \brief A 'C' implementation of a hashtable
|
|
* \author S. Uppoor
|
|
* \date 2011
|
|
* \version 0.1
|
|
* \company INRIA
|
|
* \email: sandesh.uppor@inria.fr
|
|
* \note
|
|
* \warning
|
|
*/
|
|
|
|
#ifndef _TRACE_HASHTABLE_H
|
|
#define _TRACE_HASHTABLE_H
|
|
#define LEN 1
|
|
#define RATIO 4
|
|
#include<sys/types.h>
|
|
#include<stdint.h>
|
|
#define DATA_ONLY 0
|
|
#define DATA_AND_STATUS_CHANGE 1
|
|
|
|
/**
|
|
* @struct Simple struct to hold only few information
|
|
* @brief The entry in each node is a line from the external mobility file
|
|
*/
|
|
|
|
|
|
|
|
|
|
typedef struct parsed_data
|
|
{
|
|
int vid;
|
|
int gid;
|
|
int type;
|
|
double time;
|
|
double x_pos;
|
|
double y_pos;
|
|
double speed;
|
|
int visit;
|
|
struct parsed_data* next;
|
|
}node_data;
|
|
|
|
|
|
|
|
/**
|
|
* @struct hash_table_element "hashtable.h"
|
|
* @brief stores an hash table element for use in the hash table
|
|
*/
|
|
|
|
|
|
typedef struct container
|
|
{
|
|
int flag;
|
|
int gid;
|
|
node_data* next;
|
|
node_data* end;
|
|
struct container* next_c;
|
|
}node_container;
|
|
|
|
|
|
/**
|
|
* @struct hash_table "hashtable.h"
|
|
* @brief identifies the hashtable for which operations are to be performed
|
|
*/
|
|
|
|
typedef struct hash_table
|
|
{
|
|
int key_len;
|
|
int key_count;
|
|
int ratio;
|
|
node_container **data_store;
|
|
}hash_table_t;
|
|
|
|
|
|
|
|
/**
|
|
* @struct struct acts as gateway to hashtable
|
|
* @brief holds vehicle id and initial pointer to the head of the linked list in hastable
|
|
*/
|
|
|
|
|
|
typedef struct nodeinfo
|
|
{
|
|
int vid;
|
|
int g_id;
|
|
struct nodeinfo* next;
|
|
}node_info;
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Function that returns a hash value for a given key and key_len
|
|
* @param key pointer to the key
|
|
* @param key_len length of the key
|
|
*f @param max_key max value of the hash to be returned by the function
|
|
* @returns hash value belonging to [0, max_key)
|
|
*/
|
|
uint16_t hash (int *key, int len);
|
|
|
|
// hash table operations
|
|
/**
|
|
* Fuction to create a new hash table
|
|
* @param mode hash_table_mode which the hash table should follow
|
|
* @returns hash_table_t object which references the hash table
|
|
* @returns NULL when no memory
|
|
*/
|
|
void create_new_table (int node_type);
|
|
|
|
/**
|
|
* Function to add a key - value pair to the hash table, use HT_ADD macro
|
|
* @param table hash table to add element to
|
|
* @param key pointer to the key for the hash table
|
|
* @param key_len length of the key in bytes
|
|
* @param value pointer to the value to be added against the key
|
|
* @param value_len length of the value in bytes
|
|
* @returns 0 on sucess
|
|
* @returns -1 when no memory
|
|
*/
|
|
void hash_table_add (hash_table_t* t_table, node_data* node, node_container* value);
|
|
|
|
|
|
/**
|
|
* Function to lookup a key in a particular table
|
|
* @note use this macro when size of key and/or value can be given by sizeof
|
|
* @param table table to look key in
|
|
* @param key pointer to key to be looked for
|
|
* @param key_len size of the key to be searched
|
|
* @returns NULL when key is not found in the hash table
|
|
* @returns void* pointer to the value in the table
|
|
*/
|
|
node_container* hash_table_lookup (hash_table_t* table, int id);
|
|
|
|
|
|
|
|
/**
|
|
* Function to resize the hash table store house
|
|
* @param table hash table to be resized
|
|
* @param len new length of the hash table
|
|
* @returns -1 when no elements in hash table
|
|
* @returns -2 when no emmory for new store house
|
|
* @returns 0 when sucess
|
|
*/
|
|
int hash_table_resize (void);
|
|
#endif
|