sw/phplib/utimex.inc

<?php
//$Header: /home/dashley/cvsrep/e3ft_gpl01/e3ft_gpl01/webprojs/fboprime/sw/phplib/utimex.inc,v 1.3 2006/09/25 21:11:28 dashley Exp $
//
//utimex.inc--UTIME-related functions that are not needed by the dayview
//            scheduler.
//********************************************************************************
//Copyright (C)2006 David T. Ashley
//********************************************************************************
//This program or source file is free software; you can redistribute it and/or 
//modify it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or (at your 
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//
//This program or source file is distributed in the hope that it will 
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU General Public License for more details.
//
//You may have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//********************************************************************************
//Dave Ashley, 05/06
//-------------------------------------------------------------------------------------------------
//Copyright 2006 David T. Ashley
//-------------------------------------------------------------------------------------------------
//This source code and any program in which it is compiled/used is provided under the GNU GENERAL
//PUBLIC LICENSE, Version 3, full license text below.
//-------------------------------------------------------------------------------------------------
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//
//  If the Program specifies that a proxy can decide which future
//versions of the GNU General Public License can be used, that proxy's
//public statement of acceptance of a version permanently authorizes you
//to choose that version for the Program.
//
//  Later license versions may give you additional or different
//permissions.  However, no additional obligations are imposed on any
//author or copyright holder as a result of your choosing to follow a
//later version.
//
//  15. Disclaimer of Warranty.
//
//  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
//APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
//HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
//OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
//THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
//IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
//ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
//
//  16. Limitation of Liability.
//
//  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
//WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
//THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
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//USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
//DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
//PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
//EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
//SUCH DAMAGES.
//
//  17. Interpretation of Sections 15 and 16.
//
//  If the disclaimer of warranty and limitation of liability provided
//above cannot be given local legal effect according to their terms,
//reviewing courts shall apply local law that most closely approximates
//an absolute waiver of all civil liability in connection with the
//Program, unless a warranty or assumption of liability accompanies a
//copy of the Program in return for a fee.
//
//                     END OF TERMS AND CONDITIONS
//
//            How to Apply These Terms to Your New Programs
//
//  If you develop a new program, and you want it to be of the greatest
//possible use to the public, the best way to achieve this is to make it
//free software which everyone can redistribute and change under these terms.
//
//  To do so, attach the following notices to the program.  It is safest
//to attach them to the start of each source file to most effectively
//state the exclusion of warranty; and each file should have at least
//the "copyright" line and a pointer to where the full notice is found.
//
//    <one line to give the program's name and a brief idea of what it does.>
//    Copyright (C) <year>  <name of author>
//
//    This program is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    This program is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//Also add information on how to contact you by electronic and paper mail.
//
//  If the program does terminal interaction, make it output a short
//notice like this when it starts in an interactive mode:
//
//    <program>  Copyright (C) <year>  <name of author>
//    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
//    This is free software, and you are welcome to redistribute it
//    under certain conditions; type `show c' for details.
//
//The hypothetical commands `show w' and `show c' should show the appropriate
//parts of the General Public License.  Of course, your program's commands
//might be different; for a GUI interface, you would use an "about box".
//
//  You should also get your employer (if you work as a programmer) or school,
//if any, to sign a "copyright disclaimer" for the program, if necessary.
//For more information on this, and how to apply and follow the GNU GPL, see
//<http://www.gnu.org/licenses/>.
//
//  The GNU General Public License does not permit incorporating your program
//into proprietary programs.  If your program is a subroutine library, you
//may consider it more useful to permit linking proprietary applications with
//the library.  If this is what you want to do, use the GNU Lesser General
//Public License instead of this License.  But first, please read
//<http://www.gnu.org/philosophy/why-not-lgpl.html>.
//-------------------------------------------------------------------------------------------------
//
//This source file contains Unix time functions.
//
require_once("strfunc.inc");           //Necessary to left-zero pad string representations of integers
require_once("timeraw.inc");           //Raw time acquisition.
//
//--------------------------------------------------------------------------------
//Returns a UTIME corresponding to the time (in a coarse sense, meaning that
//fractional seconds are ignored) a certain integer number of seconds offset from
//The minimum and maximum values of the UTIME are used as the floor and ceiling
//limits of the result.
//
function UTIME_time_offset_coarse($ut_in, $offset_in)
   {
   //Extract the integer seconds string.
   $int_secs_string = SubStr($ut_in, 2, 11);

   //Strip off any leading zeros.
   while ((strlen($int_secs_string) > 1) && (SubStr($int_secs_string, 0, 1) == "0"))
      $int_secs_string = SubStr($int_secs_string, 1);

   //Form an integer result that is offset from this integer by the passed
   //value.
   $offset_time = bcadd($int_secs_string, (string)$offset_in);

   //Apply the floor and ceiling.
   if (bccomp($offset_time, "0") == -1)
      {
      //Result is below the Unix epoch.  Apply floor.
      //
      return("UT00000000000000000000");
      }
   else if (bccomp($offset_time, "99999999999") == 1)
      {
      //Result is above the max value that can be represented.  Apply ceiling.
      //
      return("UT99999999999000000000");
      }
   else
      {
      //Result is valid.  Format the string and return.
      $offset_time = (string)$offset_time;
      //
      $offset_time = STRFUNC_pad_left_zero($offset_time, 11);
      return("UT" . $offset_time . "000000000");
      }
   }
//
//--------------------------------------------------------------------------------
//Reformats an UTIME string to include dots at strategic places for more
//human-friendly display.
//
function UTIME_dotted_display_string_a($utime_in)
   {
   if (! is_string($utime_in))
      {
      //Don't know what this is ... it isn't an utime.  Just send it back.
      return($utime_in);
      }
   else if (strlen($utime_in) != 22)
      {
      //This doesn't seem to be the right length for an utime.  Give it back.
      return($utime_in);
      }
   else
      {
      //Seems right.
      return(
            SubStr($utime_in, 0, 2)
            .
            "."
            .
            SubStr($utime_in, 2, 11)
            .
            "."
            .
            SubStr($utime_in, 13, 9)
            );
      }
   }
//
//--------------------------------------------------------------------------------
//End of $RCSfile: utimex.inc,v $.
//--------------------------------------------------------------------------------
?>