🦄 refactor(directory structure): restructure and rename src to infra

infra/snowflake/test/snowflake_tool.cpp

@@ -0,0 +1,38 @@
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "snowflake.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]);
+    struct snowflake_meta meta = {};
+    snowflake_deserialize(id, &meta);
+
+    printf("id              : %lu\n", id);
+    printf("base_id         : %u\n", meta.worker_base_id);
+    printf("offset_id       : %u\n", meta.worker_offset_id);
+    printf("device_id       : %u\n", meta.device_id);
+    printf("thread_id       : %u\n", meta.thread_id);
+    printf("time_cycle      : %lu sec (%lu year)\n", meta.time_cycle, meta.time_cycle / 3600 / 24 / 365);
+    printf("time_relative   : %lu sec\n", meta.time_relative);
+    printf("sequence        : %lu\n", meta.sequence);
+
+    for (int i = 6; i < 10; i++)
+    {
+        char buff[64];
+        time_t tt = meta.time_cycle * i + meta.time_relative;
+        struct tm *tm = localtime(&tt);
+        strftime(buff, sizeof(buff), "%Y-%m-%d %H:%M:%S", tm);
+        printf("\ttime_cycle * %d + time_relative => %s\n", i, buff);
+    }
+
+    return 0;
+}