blob: 7de892f53cc8343af9a512bc41f4ba61597a5989 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
* hashtbl.h
*
* Efficient dictionary hash table class.
*/
#ifndef MENU_HASHTBL_H
#define MENU_HASHTBL_H
#include <inttypes.h>
#include <stddef.h>
/* This is expected to be embedded in a larger structure */
struct hash_symbol {
uint64_t hash;
const char *key;
};
struct hash_table {
struct hash_symbol **table;
size_t load;
size_t size;
size_t max_load;
};
struct hash_insert {
uint64_t hash;
struct hash_table *head;
struct hash_symbol **where;
};
uint64_t crc64(uint64_t crc, const char *string);
uint64_t crc64i(uint64_t crc, const char *string);
#define CRC64_INIT UINT64_C(0xffffffffffffffff)
/* Some reasonable initial sizes... */
#define HASH_SMALL 4
#define HASH_MEDIUM 16
#define HASH_LARGE 256
void hash_init(struct hash_table *head, size_t size);
struct hash_symbol *hash_find(struct hash_table *head, const char *string,
struct hash_insert *insert);
struct hash_symbol *hash_findi(struct hash_table *head, const char *string,
struct hash_insert *insert);
void hash_add(struct hash_insert *insert, struct hash_symbol *sym);
void hash_free(struct hash_table *head);
#endif /* MENU_HASHTBL_H */
|
