1// SPDX-License-Identifier: GPL-3.0-or-later
2
3#include <mos/lib/structures/hashmap_common.hpp>
4#include <mos/types.hpp>
5#include <mos_string.hpp>
6
7static hash_t __pure string_hash(const char *s, const int n)
8{
9 const int p = 31, m = 1e9 + 7;
10 hash_t h = { .hash: 0 };
11 long p_pow = 1;
12 for (int i = 0; i < n; i++)
13 {
14 h.hash = (h.hash + (s[i] - 'a' + 1) * p_pow) % m;
15 p_pow = (p_pow * p) % m;
16 }
17 return h;
18}
19
20hash_t __pure hashmap_hash_string(uintn key)
21{
22 return string_hash(s: (const char *) key, n: strlen(str: (const char *) key));
23}
24
25int __pure hashmap_compare_string(uintn key1, uintn key2)
26{
27 return strcmp(str1: (const char *) key1, str2: (const char *) key2) == 0;
28}
29
30int __pure hashmap_simple_key_compare(uintn key1, uintn key2)
31{
32 return key1 == key2;
33}
34
35hash_t hashmap_identity_hash(uintn key)
36{
37 return (hash_t) { .hash = key };
38}
39