1/*	$NetBSD: efigetsecs.c,v 1.1 2017/01/24 11:09:14 nonaka Exp $	*/
2
3/*
4 * Copyright (c) 2015 YASUOKA Masahiko <yasuoka@yasuoka.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include "efiboot.h"
20
21#include <lib/libsa/net.h>
22
23satime_t
24getsecs(void)
25{
26	static const int daytab[][14] = {
27	    { 0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364 },
28	    { 0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
29	};
30	EFI_TIME t;
31	satime_t r;
32	int y;
33#define isleap(_y) (((_y) % 4) == 0 && (((_y) % 100) != 0 || ((_y) % 400) == 0))
34
35	uefi_call_wrapper(RT->GetTime, 2, &t, NULL);
36
37	/* Calc days from UNIX epoch */
38	r = (t.Year - 1970) * 365;
39	for (y = 1970; y < t.Year; y++) {
40		if (isleap(y))
41			r++;
42	}
43	r += daytab[isleap(t.Year) ? 1 : 0][t.Month] + t.Day;
44
45	/* Calc secs */
46	r *= 60 * 60 * 24;
47	r += ((t.Hour * 60) + t.Minute) * 60 + t.Second;
48	if (-24 * 60 < t.TimeZone && t.TimeZone < 24 * 60)
49		r += t.TimeZone * 60;
50
51	return r;
52}
53