Cedric Roux
aea6b4b5a6
For whatever reason most of the files had their permission changed from 644 to 755, which is not wanted.
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file trace_hashtable.h
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* \brief A 'C' implementation of a hashtable
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* \author S. Uppoor
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* \date 2011
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* \version 0.1
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* \company INRIA
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* \email: sandesh.uppor@inria.fr
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* \note
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* \warning
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*/
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#ifndef _TRACE_HASHTABLE_H
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#define _TRACE_HASHTABLE_H
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#define LEN 1
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#define RATIO 4
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#include<sys/types.h>
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#include<stdint.h>
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#define DATA_ONLY 0
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#define DATA_AND_STATUS_CHANGE 1
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/**
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* @struct Simple struct to hold only few information
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* @brief The entry in each node is a line from the external mobility file
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*/
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typedef struct parsed_data {
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int vid;
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int gid;
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int type;
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double time;
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double x_pos;
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double y_pos;
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double speed;
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int visit;
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struct parsed_data* next;
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} node_data;
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/**
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* @struct hash_table_element "hashtable.h"
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* @brief stores an hash table element for use in the hash table
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*/
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typedef struct container {
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int flag;
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int gid;
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node_data* next;
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node_data* end;
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struct container* next_c;
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} node_container;
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/**
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* @struct hash_table "hashtable.h"
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* @brief identifies the hashtable for which operations are to be performed
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*/
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typedef struct hash_table {
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int key_len;
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int key_count;
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int ratio;
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node_container **data_store;
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} hash_table_t;
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/**
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* @struct struct acts as gateway to hashtable
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* @brief holds vehicle id and initial pointer to the head of the linked list in hastable
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*/
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typedef struct nodeinfo {
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int vid;
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int g_id;
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struct nodeinfo* next;
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} node_info;
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/**
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* Function that returns a hash value for a given key and key_len
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* @param key pointer to the key
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* @param key_len length of the key
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*f @param max_key max value of the hash to be returned by the function
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* @returns hash value belonging to [0, max_key)
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*/
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uint16_t hash (int *key, int len);
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// hash table operations
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/**
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* Fuction to create a new hash table
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* @param mode hash_table_mode which the hash table should follow
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* @returns hash_table_t object which references the hash table
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* @returns NULL when no memory
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*/
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void create_new_table (int node_type);
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/**
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* Function to add a key - value pair to the hash table, use HT_ADD macro
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* @param table hash table to add element to
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* @param key pointer to the key for the hash table
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* @param key_len length of the key in bytes
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* @param value pointer to the value to be added against the key
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* @param value_len length of the value in bytes
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* @returns 0 on sucess
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* @returns -1 when no memory
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*/
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void hash_table_add (hash_table_t* t_table, node_data* node, node_container* value);
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/**
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* Function to lookup a key in a particular table
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* @note use this macro when size of key and/or value can be given by sizeof
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* @param table table to look key in
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* @param key pointer to key to be looked for
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* @param key_len size of the key to be searched
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* @returns NULL when key is not found in the hash table
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* @returns void* pointer to the value in the table
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*/
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node_container* hash_table_lookup (hash_table_t* table, int id);
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/**
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* Function to resize the hash table store house
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* @param table hash table to be resized
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* @param len new length of the hash table
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* @returns -1 when no elements in hash table
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* @returns -2 when no emmory for new store house
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* @returns 0 when sucess
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*/
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int hash_table_resize (void);
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#endif
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