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efigetsecs.c revision 1.1 
      1 /*	$NetBSD: efigetsecs.c,v 1.1 2017/01/24 11:09:14 nonaka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2015 YASUOKA Masahiko <yasuoka (at) 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 
     23 satime_t
     24 getsecs(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