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util: introduce two trivial hash_ops

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Will be used in a later commit.
This commit is contained in:
Yu Watanabe 2020-10-13 22:40:19 +09:00
parent 11e9fec259
commit 5e71868ced
2 changed files with 15 additions and 0 deletions
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13
src/basic/hash-funcs.c
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@ -71,6 +71,19 @@ const struct hash_ops trivial_hash_ops = {
.compare = trivial_compare_func,
};
const struct hash_ops trivial_hash_ops_free = {
.hash = trivial_hash_func,
.compare = trivial_compare_func,
.free_key = free,
};
const struct hash_ops trivial_hash_ops_free_free = {
.hash = trivial_hash_func,
.compare = trivial_compare_func,
.free_key = free,
.free_value = free,
};
void uint64_hash_func(const uint64_t *p, struct siphash *state) {
siphash24_compress(p, sizeof(uint64_t), state);
}

2
src/basic/hash-funcs.h
View File

@ -88,6 +88,8 @@ extern const struct hash_ops path_hash_ops_free;
void trivial_hash_func(const void *p, struct siphash *state);
int trivial_compare_func(const void *a, const void *b) _const_;
extern const struct hash_ops trivial_hash_ops;
extern const struct hash_ops trivial_hash_ops_free;
extern const struct hash_ops trivial_hash_ops_free_free;
/* 32bit values we can always just embed in the pointer itself, but in order to support 32bit archs we need store 64bit
* values indirectly, since they don't fit in a pointer. */