1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
#include <time.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
if (argc != 2)
{
printf("Usage: %s <id>\n", argv[0]);
return -1;
}
uint64_t id = atoll(argv[1]);
uint64_t sequence = id & 0x7FFF;
uint64_t time_relative = (id >> 15) & 0xFFFFFFF;
uint64_t seed = (id >> 43) & 0xFFFFF;
uint64_t thread_id = seed & 0xFF;
uint64_t instance_id = (seed >> 8) & 0xFFF;
printf("id: %lu, seed: %lu, instance_id: %lu, thread_id: %lu, time_relative: %lu, sequence: %lu\n", id, seed, instance_id, thread_id, time_relative, sequence);
#define MAX_ID_BASE_TIME (268435456L)
for (int i = 6; i < 10; i++)
{
char buff[64];
time_t tt = MAX_ID_BASE_TIME * i + time_relative;
struct tm *tm = localtime(&tt);
strftime(buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", tm);
printf("\ttime_period * %d + time_relative => %s\n", i, buff);
}
return 0;
}
|
