/*
 * =====================================================================================
 *
 *       Filename:  dll.h
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  05/02/24 08:03:38 PM IST
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  YOUR NAME (), 
 *   Organization:  
 *
 * =====================================================================================
 */

/*Header file for Doubly Linked List*/

typedef struct dll_node_{

    void *data;
    struct dll_node_ *left;
    struct dll_node_ *right;
} dll_node_t;

typedef struct dll_{
    dll_node_t *head;
    int (*key_match)(void *, void *);
    int (*comparison_fn)(void *, void *);
} dll_t;

void
register_key_match_callback(dll_t *dll, int (*key_match)(void *, void *));

void
register_comparison_callback(dll_t *dll, int (*comparison_cb)(void *, void *));

/*Generic Search function*/
void *
dll_search_by_key (dll_t *dll, void *key);

int
dll_priority_insert_data (dll_t *dll, void *data);

/* Public Function declaration to create and return
 * a new empty doubly linked list*/
dll_t *
get_new_dll();

/*  Public Function declaration to add the appication
 *  data to DLL*/
int
add_data_to_dll(dll_t *dll, void *appn_data);

/*Macro to iterate over a DLL*/

#define ITERATE_LIST_BEGIN(list_ptr, node_ptr)                              \
{                                                                           \
    dll_node_t *_node_ptr = NULL;                                           \
    node_ptr = list_ptr->head;                                              \
    for(; node_ptr!= NULL; node_ptr = _node_ptr){                           \
        if(!node_ptr) break;                                                \
        _node_ptr = node_ptr->right;

#define ITERATE_LIST_END  }}