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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef HASHTABLE_H
#define HASHTABLE_H
#include "array_size.h"
#include "list.h"
#define HASH_SIZE(name) (ARRAY_SIZE(name))
#define HASHTABLE_DECLARE(name, size) struct hlist_head name[size]
#define HASHTABLE_DEFINE(name, size) \
HASHTABLE_DECLARE(name, size) = \
{ [0 ... ((size) - 1)] = HLIST_HEAD_INIT }
#define hash_head(table, key) (&(table)[(key) % HASH_SIZE(table)])
/**
* hash_add - add an object to a hashtable
* @table: hashtable to add to
* @node: the &struct hlist_node of the object to be added
* @key: the key of the object to be added
*/
#define hash_add(table, node, key) \
hlist_add_head(node, hash_head(table, key))
/**
* hash_for_each - iterate over a hashtable
* @table: hashtable to iterate
* @obj: the type * to use as a loop cursor for each entry
* @member: the name of the hlist_node within the struct
*/
#define hash_for_each(table, obj, member) \
for (int _bkt = 0; _bkt < HASH_SIZE(table); _bkt++) \
hlist_for_each_entry(obj, &table[_bkt], member)
/**
* hash_for_each_possible - iterate over all possible objects hashing to the
* same bucket
* @table: hashtable to iterate
* @obj: the type * to use as a loop cursor for each entry
* @member: the name of the hlist_node within the struct
* @key: the key of the objects to iterate over
*/
#define hash_for_each_possible(table, obj, member, key) \
hlist_for_each_entry(obj, hash_head(table, key), member)
#endif /* HASHTABLE_H */
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