csu3_am335x/EVSE/Modularization/ocppfiles/hashmap.h

/*
 * hashmap.h
 *
 *  Created on: 2019�~4��27��
 *      Author: foluswen
 */

#ifndef HASHMAP_H_
#define HASHMAP_H_

#define KEY_COUNT (1024*1024)
#define KEY_MAX_LENGTH (37)
#define VALUE_MAX_LENGTH (65)

#define MAP_MISSING -3  /* No such element */
#define MAP_FULL -2 	/* Hashmap is full */
#define MAP_OMEM -1 	/* Out of Memory */
#define MAP_OK 0 	/* OK */

typedef struct data_struct_s
{
    char key_string[KEY_MAX_LENGTH];
    char key_value[VALUE_MAX_LENGTH];
} data_struct_t;

/*
 * any_t is a pointer.  This allows you to put arbitrary structures in
 * the hashmap.
 */
typedef void *any_t;

/*
 * PFany is a pointer to a function that can take two any_t arguments
 * and return an integer. Returns status code..
 */
typedef int (*PFany)(any_t, any_t);

/*
 * map_t is a pointer to an internally maintained data structure.
 * Clients of this package do not need to know how hashmaps are
 * represented.  They see and manipulate only map_t's.
 */
typedef any_t map_t;

/*
 * Return an empty hashmap. Returns NULL if empty.
*/
extern map_t hashmap_new();

/*
 * Iteratively call f with argument (item, data) for
 * each element data in the hashmap. The function must
 * return a map status code. If it returns anything other
 * than MAP_OK the traversal is terminated. f must
 * not reenter any hashmap functions, or deadlock may arise.
 */
extern int hashmap_iterate(map_t in, PFany f, any_t item);

/*
 * Add an element to the hashmap. Return MAP_OK or MAP_OMEM.
 */
extern int hashmap_put(map_t in, char* key, any_t value);

/*
 * Get an element from the hashmap. Return MAP_OK or MAP_MISSING.
 */
extern int hashmap_get(map_t in, char* key, any_t *arg);

/*
 * Remove an element from the hashmap. Return MAP_OK or MAP_MISSING.
 */
extern int hashmap_remove(map_t in, char* key);

/*
 * Get any element. Return MAP_OK or MAP_MISSING.
 * remove - should the element be removed from the hashmap
 */
extern int hashmap_get_one(map_t in, any_t *arg, int remove);

/*
 * Free the hashmap
 */
extern void hashmap_free(map_t in);

/*
 * Get the current size of a hashmap
 */
extern int hashmap_length(map_t in);

/*
 * hashmap_operation operation
 */
extern int hashmap_operation(int type, map_t in, char* key, any_t value, any_t *arg);

#endif /* HASHMAP_H_ */