47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include "macro.h"
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#include "siphash24.h"
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typedef void (*hash_func_t)(const void *p, struct siphash *state);
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typedef int (*compare_func_t)(const void *a, const void *b);
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struct hash_ops {
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hash_func_t hash;
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compare_func_t compare;
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};
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void string_hash_func(const void *p, struct siphash *state);
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int string_compare_func(const void *a, const void *b) _pure_;
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extern const struct hash_ops string_hash_ops;
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void path_hash_func(const void *p, struct siphash *state);
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int path_compare_func(const void *a, const void *b) _pure_;
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extern const struct hash_ops path_hash_ops;
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/* This will compare the passed pointers directly, and will not dereference them. This is hence not useful for strings
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* or suchlike. */
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void trivial_hash_func(const void *p, struct siphash *state);
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int trivial_compare_func(const void *a, const void *b) _const_;
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extern const struct hash_ops trivial_hash_ops;
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/* 32bit values we can always just embed in the pointer itself, but in order to support 32bit archs we need store 64bit
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* values indirectly, since they don't fit in a pointer. */
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void uint64_hash_func(const void *p, struct siphash *state);
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int uint64_compare_func(const void *a, const void *b) _pure_;
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extern const struct hash_ops uint64_hash_ops;
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/* On some archs dev_t is 32bit, and on others 64bit. And sometimes it's 64bit on 32bit archs, and sometimes 32bit on
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* 64bit archs. Yuck! */
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#if SIZEOF_DEV_T != 8
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void devt_hash_func(const void *p, struct siphash *state) _pure_;
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int devt_compare_func(const void *a, const void *b) _pure_;
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extern const struct hash_ops devt_hash_ops;
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#else
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#define devt_hash_func uint64_hash_func
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#define devt_compare_func uint64_compare_func
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#define devt_hash_ops uint64_hash_ops
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#endif
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