From bug-octave-request at bevo dot che dot wisc dot edu  Sun May 24 22:46:05 1998
Subject: mktime error for mips-sgi-irix6.2 
From: "Billinghurst, David" <David dot Billinghurst at riotinto dot com dot au>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Mon, 25 May 1998 13:47:54 +1000

Version:	octave-2.0.13
OS:		mips-sgi-irix6.2
Compiler:	egcs-1.0.2 with shared libraries
Problem:	make check fails intermittently on test mktime-1.m


Test mktime-1.m fails on some runs.  The test is

  t = time ();
  mktime (localtime (t)) == t

On further investigation I found that

mktime (localtime (t)) == t   in the first half of each second
mktime (localtime (t)) == t+1 in the second half of each second.

The output from localtime seems OK


Example:

octave:9> localtime(0.75)
ans =
{
  usec = 750000
  year = 70
  mon = 0
  mday = 1
  sec = 1
  zone = EST
  min = 0
  wday = 4
  hour = 10
  isdst = 0
  yday = 0
}
octave:10> mktime(localtime(0.75))
ans = 1.7500

+++++++++++++++++++++++++++++++++++++++++
(Mr) David Billinghurst
Comalco Research and Technical Support
PO Box 316, Thomastown, Vic, Australia, 3074
Phone:	+61 3 9469 0642
FAX:	+61 3 9462 2700
Email:	David dot Billinghurst at riotinto dot com dot au