mii_emu/libmui/mui/mui_utils.c

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/*
* mui_utils.c
*
* Copyright (C) 2023 Michel Pollet <buserror@gmail.com>
*
* SPDX-License-Identifier: MIT
*/
#include <time.h>
#include "mui.h"
mui_time_t
mui_get_time()
{
struct timespec tim;
clock_gettime(CLOCK_MONOTONIC_RAW, &tim);
uint64_t time = ((uint64_t)tim.tv_sec) * (1000000 / MUI_TIME_RES) +
tim.tv_nsec / (1000 * MUI_TIME_RES);
return time;
}
uint32_t
mui_hash(
const char * inString )
{
if (!inString)
return 0;
/* Described http://papa.bretmulvey.com/post/124027987928/hash-functions */
const uint32_t p = 16777619;
uint32_t hash = 0x811c9dc5;
while (*inString)
hash = (hash ^ (*inString++)) * p;
hash += hash << 13;
hash ^= hash >> 7;
hash += hash << 3;
hash ^= hash >> 17;
hash += hash << 5;
return hash;
}