Re: Timestamp -- MIDRANGE-L

If you are getting the MI TOD (time of day) value, you want something toconvert it on the iSeries first. Take a look at the Qp0zCvtToTimeval APIfor converting it. This API converts the TOD to something called a timeval,which is a structure with 2 values, seconds and microseconds. There'sanother API (localtime, IIRC) for converting the seconds of a timeval toymdhms, etc.

Here's some stuff from the MI introduction at V5R3 InfoCenter. I find itinteresting that

0000000000008000 = 8 microseconds
but don't think that
0000000000009000 = 9 microseconds.

In fact, that is still 8 microseconds, because the "8" in hex representsbit 48 from the left (0-based) and is "1" in both cases. The next incrementwould be (I think)

0000000000010000 = 16 microseconds


Standard Time Format

The Standard Time Format is defined as a 64-bit (8-byte) unsigned binaryvalue as follows:

Offset
Dec Hex Field Name                    Data Type and Length
0     0     Standard Time Format    UBin(8)
0     0         Time                              Bits 0-48
0     0         Uniqueness bits              Bits 49-63
8     8
--- End ---

The time field is a binary number which can be interpreted as a time valuein units of 8 microseconds. A binary 1 in bit 48 is equal to 8 microseconds.

The uniqueness bits field may contain any combination of binary 1s and 0s.These bits do not provide additional granularity for a time value; theymerely allow unique 64-bit values to be returned, such as when the value ofthe time-of-day (TOD) clock is materialized.

A number of MI instructions define fields to contain a binary value whichmay represent a time stamp or time interval, or may specify a wait time-outperiod. Unless explicitly stated otherwise, the format of the field is theStandard Time Format.


Examples of binary values as time intervals:

     A hex value of...  Represents...
     0000000000008000   8 microseconds
     00000000F4240000   1 second
     00000D693A400000   1 hour
     0008CD0E3A000000   1 week

Examples of binary values as time stamps:

     A hex value of...  Represents...
     0000000000000000   08/23/1928 12:03:06.314752
     4A2FEC4C82000000   01/01/1970 00:00:00.000000
     8000000000000000   01/01/2000 00:00:00.000000
     DFFFFFFFFFFF8000   07/07/2053 20:57:40.263928



At 08:54 AM 7/21/2005, you wrote:

Hi,
I am receiving TIMESTAMP value from the iSeries system as an unsigned 64bit integer value. Is it possible to convert this timestamp into areadable format in windows machine? The iSeries timestamp value is anunsigned 64 bit integer value. All the time management routines which Ican use on a windows machine deal with signed integer value. So theiSeries timestamp appears as a negative value(the MSB is 1 in the iSeriesTIMESTAMP) to the routines like ctime64() or gmtime64(). Any clues?
P.Prasad


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