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Revision 35 - (show annotations) (download)
Sat Oct 8 23:35:33 2016 UTC (7 years, 8 months ago) by dashley
File size: 2502 byte(s)
Initial commit.
1 <?php
2 //********************************************************************************
3 //Copyright (C) 2006 David T. Ashley
4 //********************************************************************************
5 //This program or source file is free software; you can redistribute it and/or
6 //modify it under the terms of the GNU General Public License as published by
7 //the Free Software Foundation; either version 2 of the License, or (at your
8 //option) any later version.
9 //
10 //This program or source file is distributed in the hope that it will
11 //be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 //MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 //GNU General Public License for more details.
14 //
15 //You may have received a copy of the GNU General Public License
16 //along with this program; if not, write to the Free Software
17 //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 //********************************************************************************
19 //Dave Ashley, 01/06
20 //
21 //This source file provides raw time related code. This file is a wrapper
22 //around the built-in PHP functions to provide more flexibility as we get
23 //near the Unix epoch.
24 //
25 //Returns the time as 18 hexadecimal digits (using upper-case letters). The
26 //first 10 characters are the integer time, and the remaining 8 are
27 //the fractional time in nanoseconds.
28 //
29 function TIMERAW_time_precision_hex()
30 {
31 //Get the microseconds and seconds.
32 list($usec, $sec) = explode(" ", microtime());
33
34 //Convert the microseconds to an integer giving the
35 //integer number of microseconds. The original value is in fractional
36 //seconds (a float).
37 $usec = $usec * 1000000.0;
38 $usec = (int) $usec;
39
40 //Convert microseconds to nanoseconds.
41 $nsec = $usec * 1000;
42
43 //Obtain a string of length 10 hex characters representing the integer
44 //time. The first 2 characters are always "00" at the present time (until
45 //Unix systems hit more than 32 bits for integers).
46 $sec_string = "00" . sprintf("%08X", $sec);
47
48 //Obtain a string of length 8 hex characters representing the fractional
49 //time.
50 $nsec_string = sprintf("%08X", $nsec);
51
52 //The returned value is the concatenation.
53 return($sec_string . $nsec_string);
54 }
55
56 //Return the size (in chars) of a precision timestamp expressed in hex.
57 //
58 function TIMERAW_time_precision_hex_size()
59 {
60 return(18);
61 }
62 ?>

dashley@gmail.com
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