1/*- 2 * Copyright (c) 1999, 2000 3 * Intel Corporation. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * 20 * This product includes software developed by Intel Corporation and 21 * its contributors. 22 * 23 * 4. Neither the name of Intel Corporation or its contributors may be 24 * used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' 28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE 31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 37 * THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD$"); 42 43#include <time.h> 44#include <sys/time.h> 45#include <stand.h> 46 47#include "libski.h" 48 49/* 50// Accurate only for the past couple of centuries; 51// that will probably do. 52// 53// (#defines From FreeBSD 3.2 lib/libc/stdtime/tzfile.h) 54*/ 55 56#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) 57#define SECSPERHOUR ( 60*60 ) 58#define SECSPERDAY (24 * SECSPERHOUR) 59 60struct ssc_time { 61 int Year; 62 int Month; 63 int Day; 64 int Hour; 65 int Minute; 66 int Second; 67 int Msec; 68 int Wday; 69}; 70 71time_t 72EfiTimeToUnixTime(struct ssc_time *ETime) 73{ 74 /* 75 // These arrays give the cumulative number of days up to the first of the 76 // month number used as the index (1 -> 12) for regular and leap years. 77 // The value at index 13 is for the whole year. 78 */ 79 static time_t CumulativeDays[2][14] = { 80 {0, 81 0, 82 31, 83 31 + 28, 84 31 + 28 + 31, 85 31 + 28 + 31 + 30, 86 31 + 28 + 31 + 30 + 31, 87 31 + 28 + 31 + 30 + 31 + 30, 88 31 + 28 + 31 + 30 + 31 + 30 + 31, 89 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31, 90 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 91 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 92 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 93 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }, 94 {0, 95 0, 96 31, 97 31 + 29, 98 31 + 29 + 31, 99 31 + 29 + 31 + 30, 100 31 + 29 + 31 + 30 + 31, 101 31 + 29 + 31 + 30 + 31 + 30, 102 31 + 29 + 31 + 30 + 31 + 30 + 31, 103 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31, 104 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30, 105 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31, 106 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30, 107 31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }}; 108 109 time_t UTime; 110 int Year; 111 112 ETime->Year += 1900; 113 114 /* 115 // Do a santity check 116 */ 117 if ( ETime->Year < 1998 || ETime->Year > 2099 || 118 ETime->Month == 0 || ETime->Month > 12 || 119 ETime->Day == 0 || ETime->Month > 31 || 120 ETime->Hour > 23 || 121 ETime->Minute > 59 || 122 ETime->Second > 59 ) { 123 return (0); 124 } 125 126 /* 127 // Years 128 */ 129 UTime = 0; 130 for (Year = 1970; Year != ETime->Year; ++Year) { 131 UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY); 132 } 133 134 /* 135 // UTime should now be set to 00:00:00 on Jan 1 of the file's year. 136 // 137 // Months 138 */ 139 UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY); 140 141 /* 142 // UTime should now be set to 00:00:00 on the first of the file's month and year 143 // 144 // Days -- Don't count the file's day 145 */ 146 UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY); 147 148 /* 149 // Hours 150 */ 151 UTime += (ETime->Hour * SECSPERHOUR); 152 153 /* 154 // Minutes 155 */ 156 UTime += (ETime->Minute * 60); 157 158 /* 159 // Seconds 160 */ 161 UTime += ETime->Second; 162 163 return UTime; 164} 165 166time_t 167time(time_t *tloc) 168{ 169 struct ssc_time time; 170 171 ssc((u_int64_t) &time, 0, 0, 0, SSC_GET_RTC); 172 173 return *tloc = EfiTimeToUnixTime(&time); 174} 175