DTUnixTimeToDwordDateTime

Converts a DWORD containing a unix time integer value to DWORD values containing date and time information.

DTUnixTimeToDwordDateTime PROTO UnixTime:DWORD

Parameters

UnixTime - DWORD containing a unix time integer value to convert to DWORD date & time values.

Returns

On return EAX will contain the date information in the following format:

EAX Register Bits:

+------------------------+------------+-----------+
| WORD                   | BYTE       | BYTE      |
+------------------------+------------+-----------+
| Bits 31-16             | Bits 15-8  | Bits 7-0  |
+------------------------+------------+-----------+
| Century Year           | Month      | Day       |
+------------------------+------------+-----------+
| CCCCYY                 | MM         | DD        |
+------------------------+------------+-----------+

On return EDX will contain the time information in the following format:

EDX Register Bits:

+------------+------------+-----------+-----------+
| BYTE       | BYTE       | BYTE      | BYTE      |
+------------+------------+-----------+-----------+
| Bits 31-23 | Bits 23-16 | Bits 15-8 | Bits 7-0  |
+------------+------------+-----------+-----------+
| Hour       | Minute     | Second    | Millisec  |
+------------+------------+-----------+-----------+
| HH         | MM         | SS        | MS        |
+------------+------------+-----------+-----------+

Notes

Unix time is defined as the number of seconds elapsed since 00:00 Universal time on January 1, 1970 in the Gregorian calendar (Julian day 2440587.5)

Example

.data?
dwDate dd ?
dwTime dd ?
Year dw ?
Month db ?
Day db ?
Hours db ?
Minutes db ?
Seconds db ?
Millisec db ?

.code
Invoke DTUnixTimeToDwordDateTime, 1276278420
mov dwDate, eax ; eax contains the date information
mov dwTime, edx ; edx contains the time information

mov eax, dwDate
shr eax, 16 ; move year into upper word of eax
mov Year,  ax ; year
mov eax, dwDate
mov Month, ah ; month
mov Day, al ; day

mov eax, dwTime
shr eax, 16 ; move hour and minute into upper word of eax
mov Hours, ah ; hours
mov Minutes, al ; minutes
mov eax, dwTime
mov Seconds, ah ; seconds
mov Millisec, al ; millseconds