Re: more on SAS data files

[Ben Pfaff]

Ben Pfaff <address@hidden> writes:

> Offset 0xa4 almost certainly contains the date and time at which
> the file was created, because sorting the files by the bytes in
> the 8 bytes starting there causes them to be put into a
> reasonable order of creation.  I'd assume that it was written as
> an IEEE 8-byte float in seconds since Jan 1, 1960, since that's
> the format that SAS uses internally anyhow, but by my
> calculations that would mean that your sample files were created
> sometime around March 21, 2007, which I assume is over a year
> off, so something is fishy here.

Never mind.  On a second look, I think it must be spot on,
because that's the same date saved in the zip file for those
files:

    address@hidden:~/tmp(0)$ zipinfo sas-files.zip |head -5
    Archive:  sas-files.zip   707074 bytes   846 files
    -rw-a--     2.0 fat    57925 t- defN 21-Mar-07 10:49 sas-data-generator.sas
    -rw-a--     2.0 fat   264416 t- defN 21-Mar-07 10:51 logfile.log
    -rw-a--     2.0 fat     5120 b- defN 21-Mar-07 10:50 
n_cases_1_float_0.sas7bdat
    -rw-a--     2.0 fat     5120 b- defN 21-Mar-07 10:50 
n_cases_1_float_0_float_0.sas7bdat
    address@hidden:~/tmp(0)$ 
-- 
Ben Pfaff 
http://benpfaff.org