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1 dashley 31 <?php
2     //$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 $
3     //
4     //utimex.inc--UTIME-related functions that are not needed by the dayview
5     // scheduler.
6     //********************************************************************************
7     //Copyright (C)2006 David T. Ashley
8     //********************************************************************************
9     //This program or source file is free software; you can redistribute it and/or
10     //modify it under the terms of the GNU General Public License as published by
11     //the Free Software Foundation; either version 2 of the License, or (at your
12     //option) any later version.
13     //
14     //This program or source file is distributed in the hope that it will
15     //be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
16     //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17     //GNU General Public License for more details.
18     //
19     //You may have received a copy of the GNU General Public License
20     //along with this program; if not, write to the Free Software
21     //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22     //********************************************************************************
23     //Dave Ashley, 05/06
24     //-------------------------------------------------------------------------------------------------
25     //Copyright 2006 David T. Ashley
26     //-------------------------------------------------------------------------------------------------
27     //This source code and any program in which it is compiled/used is provided under the GNU GENERAL
28     //PUBLIC LICENSE, Version 3, full license text below.
29     //-------------------------------------------------------------------------------------------------
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31     // Version 3, 29 June 2007
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506     // A contributor's "essential patent claims" are all patent claims
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508     //hereafter acquired, that would be infringed by some manner, permitted
509     //by this License, of making, using, or selling its contributor version,
510     //but do not include claims that would be infringed only as a
511     //consequence of further modification of the contributor version. For
512     //purposes of this definition, "control" includes the right to grant
513     //patent sublicenses in a manner consistent with the requirements of
514     //this License.
515     //
516     // Each contributor grants you a non-exclusive, worldwide, royalty-free
517     //patent license under the contributor's essential patent claims, to
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519     //propagate the contents of its contributor version.
520     //
521     // In the following three paragraphs, a "patent license" is any express
522     //agreement or commitment, however denominated, not to enforce a patent
523     //(such as an express permission to practice a patent or covenant not to
524     //sue for patent infringement). To "grant" such a patent license to a
525     //party means to make such an agreement or commitment not to enforce a
526     //patent against the party.
527     //
528     // If you convey a covered work, knowingly relying on a patent license,
529     //and the Corresponding Source of the work is not available for anyone
530     //to copy, free of charge and under the terms of this License, through a
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533     //available, or (2) arrange to deprive yourself of the benefit of the
534     //patent license for this particular work, or (3) arrange, in a manner
535     //consistent with the requirements of this License, to extend the patent
536     //license to downstream recipients. "Knowingly relying" means you have
537     //actual knowledge that, but for the patent license, your conveying the
538     //covered work in a country, or your recipient's use of the covered work
539     //in a country, would infringe one or more identifiable patents in that
540     //country that you have reason to believe are valid.
541     //
542     // If, pursuant to or in connection with a single transaction or
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545     //receiving the covered work authorizing them to use, propagate, modify
546     //or convey a specific copy of the covered work, then the patent license
547     //you grant is automatically extended to all recipients of the covered
548     //work and works based on it.
549     //
550     // A patent license is "discriminatory" if it does not include within
551     //the scope of its coverage, prohibits the exercise of, or is
552     //conditioned on the non-exercise of one or more of the rights that are
553     //specifically granted under this License. You may not convey a covered
554     //work if you are a party to an arrangement with a third party that is
555     //in the business of distributing software, under which you make payment
556     //to the third party based on the extent of your activity of conveying
557     //the work, and under which the third party grants, to any of the
558     //parties who would receive the covered work from you, a discriminatory
559     //patent license (a) in connection with copies of the covered work
560     //conveyed by you (or copies made from those copies), or (b) primarily
561     //for and in connection with specific products or compilations that
562     //contain the covered work, unless you entered into that arrangement,
563     //or that patent license was granted, prior to 28 March 2007.
564     //
565     // Nothing in this License shall be construed as excluding or limiting
566     //any implied license or other defenses to infringement that may
567     //otherwise be available to you under applicable patent law.
568     //
569     // 12. No Surrender of Others' Freedom.
570     //
571     // If conditions are imposed on you (whether by court order, agreement or
572     //otherwise) that contradict the conditions of this License, they do not
573     //excuse you from the conditions of this License. If you cannot convey a
574     //covered work so as to satisfy simultaneously your obligations under this
575     //License and any other pertinent obligations, then as a consequence you may
576     //not convey it at all. For example, if you agree to terms that obligate you
577     //to collect a royalty for further conveying from those to whom you convey
578     //the Program, the only way you could satisfy both those terms and this
579     //License would be to refrain entirely from conveying the Program.
580     //
581     // 13. Use with the GNU Affero General Public License.
582     //
583     // Notwithstanding any other provision of this License, you have
584     //permission to link or combine any covered work with a work licensed
585     //under version 3 of the GNU Affero General Public License into a single
586     //combined work, and to convey the resulting work. The terms of this
587     //License will continue to apply to the part which is the covered work,
588     //but the special requirements of the GNU Affero General Public License,
589     //section 13, concerning interaction through a network will apply to the
590     //combination as such.
591     //
592     // 14. Revised Versions of this License.
593     //
594     // The Free Software Foundation may publish revised and/or new versions of
595     //the GNU General Public License from time to time. Such new versions will
596     //be similar in spirit to the present version, but may differ in detail to
597     //address new problems or concerns.
598     //
599     // Each version is given a distinguishing version number. If the
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601     //Public License "or any later version" applies to it, you have the
602     //option of following the terms and conditions either of that numbered
603     //version or of any later version published by the Free Software
604     //Foundation. If the Program does not specify a version number of the
605     //GNU General Public License, you may choose any version ever published
606     //by the Free Software Foundation.
607     //
608     // If the Program specifies that a proxy can decide which future
609     //versions of the GNU General Public License can be used, that proxy's
610     //public statement of acceptance of a version permanently authorizes you
611     //to choose that version for the Program.
612     //
613     // Later license versions may give you additional or different
614     //permissions. However, no additional obligations are imposed on any
615     //author or copyright holder as a result of your choosing to follow a
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617     //
618     // 15. Disclaimer of Warranty.
619     //
620     // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
621     //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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626     //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
627     //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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629     // 16. Limitation of Liability.
630     //
631     // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
632     //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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636     //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
637     //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
638     //EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
639     //SUCH DAMAGES.
640     //
641     // 17. Interpretation of Sections 15 and 16.
642     //
643     // If the disclaimer of warranty and limitation of liability provided
644     //above cannot be given local legal effect according to their terms,
645     //reviewing courts shall apply local law that most closely approximates
646     //an absolute waiver of all civil liability in connection with the
647     //Program, unless a warranty or assumption of liability accompanies a
648     //copy of the Program in return for a fee.
649     //
650     // END OF TERMS AND CONDITIONS
651     //
652     // How to Apply These Terms to Your New Programs
653     //
654     // If you develop a new program, and you want it to be of the greatest
655     //possible use to the public, the best way to achieve this is to make it
656     //free software which everyone can redistribute and change under these terms.
657     //
658     // To do so, attach the following notices to the program. It is safest
659     //to attach them to the start of each source file to most effectively
660     //state the exclusion of warranty; and each file should have at least
661     //the "copyright" line and a pointer to where the full notice is found.
662     //
663     // <one line to give the program's name and a brief idea of what it does.>
664     // Copyright (C) <year> <name of author>
665     //
666     // This program is free software: you can redistribute it and/or modify
667     // it under the terms of the GNU General Public License as published by
668     // the Free Software Foundation, either version 3 of the License, or
669     // (at your option) any later version.
670     //
671     // This program is distributed in the hope that it will be useful,
672     // but WITHOUT ANY WARRANTY; without even the implied warranty of
673     // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
674     // GNU General Public License for more details.
675     //
676     // You should have received a copy of the GNU General Public License
677     // along with this program. If not, see <http://www.gnu.org/licenses/>.
678     //
679     //Also add information on how to contact you by electronic and paper mail.
680     //
681     // If the program does terminal interaction, make it output a short
682     //notice like this when it starts in an interactive mode:
683     //
684     // <program> Copyright (C) <year> <name of author>
685     // This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
686     // This is free software, and you are welcome to redistribute it
687     // under certain conditions; type `show c' for details.
688     //
689     //The hypothetical commands `show w' and `show c' should show the appropriate
690     //parts of the General Public License. Of course, your program's commands
691     //might be different; for a GUI interface, you would use an "about box".
692     //
693     // You should also get your employer (if you work as a programmer) or school,
694     //if any, to sign a "copyright disclaimer" for the program, if necessary.
695     //For more information on this, and how to apply and follow the GNU GPL, see
696     //<http://www.gnu.org/licenses/>.
697     //
698     // The GNU General Public License does not permit incorporating your program
699     //into proprietary programs. If your program is a subroutine library, you
700     //may consider it more useful to permit linking proprietary applications with
701     //the library. If this is what you want to do, use the GNU Lesser General
702     //Public License instead of this License. But first, please read
703     //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
704     //-------------------------------------------------------------------------------------------------
705     //
706     //This source file contains Unix time functions.
707     //
708     require_once("strfunc.inc"); //Necessary to left-zero pad string representations of integers
709     require_once("timeraw.inc"); //Raw time acquisition.
710     //
711     //--------------------------------------------------------------------------------
712     //Returns a UTIME corresponding to the time (in a coarse sense, meaning that
713     //fractional seconds are ignored) a certain integer number of seconds offset from
714     //The minimum and maximum values of the UTIME are used as the floor and ceiling
715     //limits of the result.
716     //
717     function UTIME_time_offset_coarse($ut_in, $offset_in)
718     {
719     //Extract the integer seconds string.
720     $int_secs_string = SubStr($ut_in, 2, 11);
721    
722     //Strip off any leading zeros.
723     while ((strlen($int_secs_string) > 1) && (SubStr($int_secs_string, 0, 1) == "0"))
724     $int_secs_string = SubStr($int_secs_string, 1);
725    
726     //Form an integer result that is offset from this integer by the passed
727     //value.
728     $offset_time = bcadd($int_secs_string, (string)$offset_in);
729    
730     //Apply the floor and ceiling.
731     if (bccomp($offset_time, "0") == -1)
732     {
733     //Result is below the Unix epoch. Apply floor.
734     //
735     return("UT00000000000000000000");
736     }
737     else if (bccomp($offset_time, "99999999999") == 1)
738     {
739     //Result is above the max value that can be represented. Apply ceiling.
740     //
741     return("UT99999999999000000000");
742     }
743     else
744     {
745     //Result is valid. Format the string and return.
746     $offset_time = (string)$offset_time;
747     //
748     $offset_time = STRFUNC_pad_left_zero($offset_time, 11);
749     return("UT" . $offset_time . "000000000");
750     }
751     }
752     //
753     //--------------------------------------------------------------------------------
754     //Reformats an UTIME string to include dots at strategic places for more
755     //human-friendly display.
756     //
757     function UTIME_dotted_display_string_a($utime_in)
758     {
759     if (! is_string($utime_in))
760     {
761     //Don't know what this is ... it isn't an utime. Just send it back.
762     return($utime_in);
763     }
764     else if (strlen($utime_in) != 22)
765     {
766     //This doesn't seem to be the right length for an utime. Give it back.
767     return($utime_in);
768     }
769     else
770     {
771     //Seems right.
772     return(
773     SubStr($utime_in, 0, 2)
774     .
775     "."
776     .
777     SubStr($utime_in, 2, 11)
778     .
779     "."
780     .
781     SubStr($utime_in, 13, 9)
782     );
783     }
784     }
785     //
786     //--------------------------------------------------------------------------------
787     //End of $RCSfile: utimex.inc,v $.
788     //--------------------------------------------------------------------------------
789     ?>

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