1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 Copyright 2010 Lennart Poettering
6 Copyright 2014 Michal Schmidt
10 #include "siphash24.h"
12 typedef void (*hash_func_t
)(const void *p
, struct siphash
*state
);
13 typedef int (*compare_func_t
)(const void *a
, const void *b
);
17 compare_func_t compare
;
20 void string_hash_func(const void *p
, struct siphash
*state
);
21 int string_compare_func(const void *a
, const void *b
) _pure_
;
22 extern const struct hash_ops string_hash_ops
;
24 void path_hash_func(const void *p
, struct siphash
*state
);
25 int path_compare_func(const void *a
, const void *b
) _pure_
;
26 extern const struct hash_ops path_hash_ops
;
28 /* This will compare the passed pointers directly, and will not dereference them. This is hence not useful for strings
30 void trivial_hash_func(const void *p
, struct siphash
*state
);
31 int trivial_compare_func(const void *a
, const void *b
) _const_
;
32 extern const struct hash_ops trivial_hash_ops
;
34 /* 32bit values we can always just embed in the pointer itself, but in order to support 32bit archs we need store 64bit
35 * values indirectly, since they don't fit in a pointer. */
36 void uint64_hash_func(const void *p
, struct siphash
*state
);
37 int uint64_compare_func(const void *a
, const void *b
) _pure_
;
38 extern const struct hash_ops uint64_hash_ops
;
40 /* On some archs dev_t is 32bit, and on others 64bit. And sometimes it's 64bit on 32bit archs, and sometimes 32bit on
41 * 64bit archs. Yuck! */
43 void devt_hash_func(const void *p
, struct siphash
*state
) _pure_
;
44 int devt_compare_func(const void *a
, const void *b
) _pure_
;
45 extern const struct hash_ops devt_hash_ops
;
47 #define devt_hash_func uint64_hash_func
48 #define devt_compare_func uint64_compare_func
49 #define devt_hash_ops uint64_hash_ops