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1 | /** @file\r |
2 | *\r | |
3 | * Copyright (c) 2016, Hisilicon Limited. All rights reserved.\r | |
4 | * Copyright (c) 2016, Linaro Limited. All rights reserved.\r | |
5 | *\r | |
6 | * This program and the accompanying materials\r | |
7 | * are licensed and made available under the terms and conditions of the BSD License\r | |
8 | * which accompanies this distribution. The full text of the license may be found at\r | |
9 | * http://opensource.org/licenses/bsd-license.php\r | |
10 | *\r | |
11 | * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | *\r | |
14 | **/\r | |
15 | \r | |
16 | #include <Uefi/UefiBaseType.h>\r | |
17 | #include <Uefi/UefiSpec.h>\r | |
18 | #include <Library/DebugLib.h>\r | |
19 | #include <Library/TimeBaseLib.h>\r | |
20 | \r | |
21 | /**\r | |
22 | Converts Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC) to EFI_TIME\r | |
23 | **/\r | |
24 | VOID\r | |
25 | EFIAPI\r | |
26 | EpochToEfiTime (\r | |
27 | IN UINTN EpochSeconds,\r | |
28 | OUT EFI_TIME *Time\r | |
29 | )\r | |
30 | {\r | |
31 | UINTN a;\r | |
32 | UINTN b;\r | |
33 | UINTN c;\r | |
34 | UINTN d;\r | |
35 | UINTN g;\r | |
36 | UINTN j;\r | |
37 | UINTN m;\r | |
38 | UINTN y;\r | |
39 | UINTN da;\r | |
40 | UINTN db;\r | |
41 | UINTN dc;\r | |
42 | UINTN dg;\r | |
43 | UINTN hh;\r | |
44 | UINTN mm;\r | |
45 | UINTN ss;\r | |
46 | UINTN J;\r | |
47 | \r | |
48 | J = (EpochSeconds / 86400) + 2440588;\r | |
49 | j = J + 32044;\r | |
50 | g = j / 146097;\r | |
51 | dg = j % 146097;\r | |
52 | c = (((dg / 36524) + 1) * 3) / 4;\r | |
53 | dc = dg - (c * 36524);\r | |
54 | b = dc / 1461;\r | |
55 | db = dc % 1461;\r | |
56 | a = (((db / 365) + 1) * 3) / 4;\r | |
57 | da = db - (a * 365);\r | |
58 | y = (g * 400) + (c * 100) + (b * 4) + a;\r | |
59 | m = (((da * 5) + 308) / 153) - 2;\r | |
60 | d = da - (((m + 4) * 153) / 5) + 122;\r | |
61 | \r | |
62 | Time->Year = y - 4800 + ((m + 2) / 12);\r | |
63 | Time->Month = ((m + 2) % 12) + 1;\r | |
64 | Time->Day = d + 1;\r | |
65 | \r | |
66 | ss = EpochSeconds % 60;\r | |
67 | a = (EpochSeconds - ss) / 60;\r | |
68 | mm = a % 60;\r | |
69 | b = (a - mm) / 60;\r | |
70 | hh = b % 24;\r | |
71 | \r | |
72 | Time->Hour = hh;\r | |
73 | Time->Minute = mm;\r | |
74 | Time->Second = ss;\r | |
75 | Time->Nanosecond = 0;\r | |
76 | \r | |
77 | }\r | |
78 | \r | |
79 | /**\r | |
91c31ff0 | 80 | Calculate Epoch days\r |
b4895995 LL |
81 | **/\r |
82 | UINTN\r | |
83 | EFIAPI\r | |
91c31ff0 | 84 | EfiGetEpochDays (\r |
b4895995 LL |
85 | IN EFI_TIME *Time\r |
86 | )\r | |
87 | {\r | |
88 | UINTN a;\r | |
89 | UINTN y;\r | |
90 | UINTN m;\r | |
91 | UINTN JulianDate; // Absolute Julian Date representation of the supplied Time\r | |
92 | UINTN EpochDays; // Number of days elapsed since EPOCH_JULIAN_DAY\r | |
b4895995 LL |
93 | \r |
94 | a = (14 - Time->Month) / 12 ;\r | |
95 | y = Time->Year + 4800 - a;\r | |
96 | m = Time->Month + (12*a) - 3;\r | |
97 | \r | |
98 | JulianDate = Time->Day + ((153*m + 2)/5) + (365*y) + (y/4) - (y/100) + (y/400) - 32045;\r | |
99 | \r | |
100 | ASSERT (JulianDate >= EPOCH_JULIAN_DATE);\r | |
101 | EpochDays = JulianDate - EPOCH_JULIAN_DATE;\r | |
102 | \r | |
91c31ff0 MA |
103 | return EpochDays;\r |
104 | }\r | |
105 | /**\r | |
106 | Converts EFI_TIME to Epoch seconds (elapsed since 1970 JANUARY 01, 00:00:00 UTC)\r | |
107 | **/\r | |
108 | UINTN\r | |
109 | EFIAPI\r | |
110 | EfiTimeToEpoch (\r | |
111 | IN EFI_TIME *Time\r | |
112 | )\r | |
113 | {\r | |
114 | UINTN EpochDays; // Number of days elapsed since EPOCH_JULIAN_DAY\r | |
115 | UINTN EpochSeconds;\r | |
116 | \r | |
117 | EpochDays = EfiGetEpochDays (Time);\r | |
118 | \r | |
b4895995 LL |
119 | EpochSeconds = (EpochDays * SEC_PER_DAY) + ((UINTN)Time->Hour * SEC_PER_HOUR) + (Time->Minute * SEC_PER_MIN) + Time->Second;\r |
120 | \r | |
121 | return EpochSeconds;\r | |
122 | }\r | |
123 | \r | |
91c31ff0 MA |
124 | /**\r |
125 | returns Day of the week [0-6] 0=Sunday\r | |
126 | **/\r | |
127 | UINTN\r | |
128 | EfiTimeToWday (\r | |
129 | IN EFI_TIME *Time\r | |
130 | )\r | |
131 | {\r | |
132 | UINTN EpochDays; // Number of days elapsed since EPOCH_JULIAN_DAY\r | |
133 | \r | |
134 | EpochDays = EfiGetEpochDays (Time);\r | |
135 | \r | |
136 | // 4=1/1/1970 was a Thursday\r | |
137 | \r | |
138 | return (EpochDays + 4) % 7;\r | |
139 | }\r | |
140 | \r | |
b4895995 LL |
141 | BOOLEAN\r |
142 | EFIAPI\r | |
143 | IsLeapYear (\r | |
144 | IN EFI_TIME *Time\r | |
145 | )\r | |
146 | {\r | |
147 | if (Time->Year % 4 == 0) {\r | |
148 | if (Time->Year % 100 == 0) {\r | |
149 | if (Time->Year % 400 == 0) {\r | |
150 | return TRUE;\r | |
151 | } else {\r | |
152 | return FALSE;\r | |
153 | }\r | |
154 | } else {\r | |
155 | return TRUE;\r | |
156 | }\r | |
157 | } else {\r | |
158 | return FALSE;\r | |
159 | }\r | |
160 | }\r | |
161 | \r | |
162 | BOOLEAN\r | |
163 | EFIAPI\r | |
164 | IsDayValid (\r | |
165 | IN EFI_TIME *Time\r | |
166 | )\r | |
167 | {\r | |
168 | STATIC CONST INTN DayOfMonth[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };\r | |
169 | \r | |
170 | if (Time->Day < 1 ||\r | |
171 | Time->Day > DayOfMonth[Time->Month - 1] ||\r | |
172 | (Time->Month == 2 && (!IsLeapYear (Time) && Time->Day > 28))\r | |
173 | ) {\r | |
174 | return FALSE;\r | |
175 | }\r | |
176 | \r | |
177 | return TRUE;\r | |
178 | }\r | |
179 | \r | |
180 | BOOLEAN\r | |
181 | EFIAPI\r | |
182 | IsTimeValid(\r | |
183 | IN EFI_TIME *Time\r | |
184 | )\r | |
185 | {\r | |
186 | // Check the input parameters are within the range specified by UEFI\r | |
187 | if ((Time->Year < 2000) ||\r | |
188 | (Time->Year > 2099) ||\r | |
189 | (Time->Month < 1 ) ||\r | |
190 | (Time->Month > 12 ) ||\r | |
191 | (!IsDayValid (Time) ) ||\r | |
192 | (Time->Hour > 23 ) ||\r | |
193 | (Time->Minute > 59 ) ||\r | |
194 | (Time->Second > 59 ) ||\r | |
195 | (Time->Nanosecond > 999999999) ||\r | |
196 | (!((Time->TimeZone == EFI_UNSPECIFIED_TIMEZONE) || ((Time->TimeZone >= -1440) && (Time->TimeZone <= 1440)))) ||\r | |
197 | (Time->Daylight & (~(EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT)))\r | |
198 | ) {\r | |
199 | return FALSE;\r | |
200 | }\r | |
201 | \r | |
202 | return TRUE;\r | |
203 | }\r |