On Tue, Sep 02, 2008 at 02:03:25AM -0700, Jerry wrote: > > On Sep 1, 2008, at 4:10 PM, Alan W. Irwin wrote: > > > On 2008-09-01 14:58-0700 Jerry wrote: > > > >> Andrew, > >> > >> Does the Ada example, with xmin hardcoded to 1_133_395_200.0, > >> generate the same Postscript as the C example? > > > > The current Ada example 29 code has > > > > xmin := 1133395200.0; > > > > (no underscores), > > Sorry--Ada ignores underscores in numeric constants. > > > and yes, that hard-coded value gives identical results to > > the C example which is implemented in UTC to avoid anomalies in > > daylight > > savings time that occur for such locales as the UK. > > From this and the proceeding discussion, I gather that the Ada > example with the Time_Of function, when run in the UK, does not > generate the same Postscript code as example 29 in C, but when run in > North America, it does. Is that correct? > > Again, could someone check to see if > > xmin := Long_Float(Time_Of(2005, 12, 1, 0.0) - Time_Of(1970, 1, 1, > 0.0)); > > results in a value for xmin of 1_133_395_200.0 when run in the UK, as > it does in North America? According to my reading of the Ada > Reference Manual, it should.
Jerry, Coming back to your original question. In the UK I get 1.13339880000000E+09 for the result of the above calculation. If I do export TZ="UTC" before running the example then I get the correct answer of 1.13339520000000E+09. Looks like gnat Time_Of is just calling the C library mktime function so is in local time (including any daylight savings). Andrew ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
