1 /* 2 * Copyright (C) 2018 Alexander Borisov 3 * 4 * Author: Alexander Borisov <borisov@lexbor.com> 5 */ 6 7 #include "lexbor/core/utils.h" 8 9 10 size_t lexbor_utils_power(size_t t,size_t k)11lexbor_utils_power(size_t t, size_t k) 12 { 13 size_t res = 1; 14 15 while (k) { 16 if (k & 1) { 17 res *= t; 18 } 19 20 t *= t; 21 k >>= 1; 22 } 23 24 return res; 25 } 26 27 size_t lexbor_utils_hash_hash(const lxb_char_t * key,size_t key_size)28lexbor_utils_hash_hash(const lxb_char_t *key, size_t key_size) 29 { 30 size_t hash, i; 31 32 for (hash = i = 0; i < key_size; i++) { 33 hash += key[i]; 34 hash += (hash << 10); 35 hash ^= (hash >> 6); 36 } 37 38 hash += (hash << 3); 39 hash ^= (hash >> 11); 40 hash += (hash << 15); 41 42 return hash; 43 } 44
