Source Code for Module qubx.date

 1  """Date/time conversion between module datetime, Delphi, and "HH:MM:SS". 
 2   
 3  Copyright 2007-2012 Research Foundation State University of New York  
 4  This file is part of QUB Express.                                           
 5   
 6  QUB Express is free software; you can redistribute it and/or modify           
 7  it under the terms of the GNU General Public License as published by  
 8  the Free Software Foundation, either version 3 of the License, or     
 9  (at your option) any later version.                                   
10   
11  QUB Express is distributed in the hope that it will be useful,                
12  but WITHOUT ANY WARRANTY; without even the implied warranty of        
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         
14  GNU General Public License for more details.                          
15   
16  You should have received a copy of the GNU General Public License,    
17  named LICENSE.txt, in the QUB Express program directory.  If not, see         
18  <http://www.gnu.org/licenses/>.                                       
19   
20  """ 
21   
22  import datetime 
23  import time 
24   
25  epoch = datetime.datetime(1899, 12, 30) 
26   
27  DayPerSec = 1.0 / (3600*24) 
28  DayPerUsec = DayPerSec / 1e6 
29   
30 -def DelphiToDatetime(delphi): 
31      """Delphi stores datetime as double-precision seconds since 12/30/1899.""" 
32      return epoch + datetime.timedelta(delphi) 
33 -def DatetimeToDelphi(dt): 
34      """Delphi stores datetime as double-precision seconds since 12/30/1899.""" 
35      delta = dt - epoch 
36      return (delta.days 
37              + delta.seconds * DayPerSec 
38              + delta.microseconds * DayPerUsec) 
39   
40  # ***************************************************************************** 
41   
42 -def SecondsToHMS(x, min_places=1): 
43      """Returns x seconds formatted as "[-] [[HH:]MM:]SS." """ 
44      if x < 0: 
45          x = -x 
46          prefix = '-' 
47      else: 
48          prefix = '' 
49      s = x % 60 
50      s, fs = int(s), s - int(s) 
51      s_str = "%02d" % s 
52      if fs: 
53          s_str = "%s%s" % (s_str, ("%.3f" % fs)[1:]) 
54      m = int(x) / 60 
55      h, m = m/60, m%60 
56      if h or (min_places >= 3): 
57          return "%s%02d:%02d:%s" % (prefix,h,m,s_str) 
58      elif m or (min_places == 2): 
59          return "%s%02d:%s" % (prefix,m,s_str) 
60      else: 
61          return "%s%s" % (prefix,s_str) 
62   
63 -def HMSToSeconds(hms): 
64      """Returns the number of seconds in "[-] [[HH:]MM:]SS." """ 
65      result = 0 
66      part = hms 
67      while True: 
68          i = part.find(':') 
69          if i < 0: 
70              return 60*result + int(part) 
71          result = 60*result + int(part[:i]) 
72          part = part[i+1:] 
73   
74   
75 -def formatUnixDate(idate): 
76      return time.strftime("%Y/%m/%d %H:%M:%S", time.localtime(idate)) 
77