DTQwordDateTimeToUnixTime

Converts QWORD values containing date & time information to a QWORD value containing a unix time integer value. On return RAX contains the unix time integer value.

DTQwordDateTimeToUnixTime PROTO qwDate:QWORD, qwTime:QWORD

Parameters

qwDate - QWORD value containing date information to convert to a unix time integer value.

The format for the value containing the date information is as follows:

date QWORD Register Bits:

+--------------------------------------------------+------------------------+------------+-----------+
| DWORD                                            | WORD                   | BYTE       | BYTE      |
+--------------------------------------------------+------------------------+------------+-----------+
| Bits 63-32                                       | Bits 31-16             | Bits 15-8  | Bits 7-0  |
+--------------------------------------------------+------------------------+------------+-----------+
| Not used - Not applicable                        | Century Year           | Month      | Day       |
+--------------------------------------------------+------------------------+------------+-----------+
| N/A                                              | CCCCYY                 | MM         | DD        |
+--------------------------------------------------+------------------------+------------+-----------+

qwTime - QWORD value containing time information to convert to a unix time integer value.

The format for the value containing the time information is as follows:

time QWORD Register Bits:

+--------------------------------------------------+------------+------------+-----------+-----------+
| DWORD                                            | BYTE       | BYTE       | BYTE      | BYTE      |
+--------------------------------------------------+------------+------------+-----------+-----------+
| Bits 63-32                                       | Bits 31-23 | Bits 23-16 | Bits 15-8 | Bits 7-0  |
+--------------------------------------------------+------------+------------+-----------+-----------+
| Not used - Not applicable                        | Hour       | Minute     | Second    | Millisec  |
+--------------------------------------------------+------------+------------+-----------+-----------+
| N/A                                              | HH         | MM         | SS        | MS        |
+--------------------------------------------------+------------+------------+-----------+-----------+

Returns

On return RAX will contain the unix time integer value.

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

Invoke DTQwordDateTimeToUnixTime, qwDate, qwTime