wxPython/wx/lib/CDate.py

   1 # Name:         CDate.py
   2 # Purpose:      Date and Calendar classes
   3 #
   4 # Author:       Lorne White (email: lwhite1@planet.eon.net)
   5 #
   6 # Created:
   7 # Version       0.2 08-Nov-1999
   8 # Licence:      wxWindows license
   9 #----------------------------------------------------------------------------
  10 # Updated:      01-Dec-2004
  11 # Action:       Cast the year variable to an integer under the Date Class
  12 # Reason:       When the year was compared in the isleap() function, if it was
  13 #               in a string format, then an error was raised.
  14
  15 import time
  16
  17 Month = {2: 'February', 3: 'March', None: 0, 'July': 7, 11:
  18          'November', 'December': 12, 'June': 6, 'January': 1, 'September': 9,
  19          'August': 8, 'March': 3, 'November': 11, 'April': 4, 12: 'December',
  20          'May': 5, 10: 'October', 9: 'September', 8: 'August', 7: 'July', 6:
  21          'June', 5: 'May', 4: 'April', 'October': 10, 'February': 2, 1:
  22          'January', 0: None}
  23
  24 # Number of days per month (except for February in leap years)
  25 mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
  26
  27 # Full and abbreviated names of weekdays
  28 day_name = [ 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
  29 day_abbr = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', ]
  30
  31 # Return number of leap years in range [y1, y2)
  32 # Assume y1 <= y2 and no funny (non-leap century) years
  33
  34 def leapdays(y1, y2):
  35     return (y2+3)/4 - (y1+3)/4
  36
  37 # Return 1 for leap years, 0 for non-leap years
  38 def isleap(year):
  39     return year % 4 == 0 and (year % 100 <> 0 or year % 400 == 0)
  40
  41 def FillDate(val):
  42     s = str(val)
  43     if len(s) < 2:
  44         s = '0' + s
  45     return s
  46
  47
  48 def julianDay(year, month, day):
  49     b = 0L
  50     year, month, day = long(year), long(month), long(day)
  51     if month > 12L:
  52         year = year + month/12L
  53         month = month%12
  54     elif month < 1L:
  55         month = -month
  56         year = year - month/12L - 1L
  57         month = 12L - month%12L
  58     if year > 0L:
  59         yearCorr = 0L
  60     else:
  61         yearCorr = 3L
  62     if month < 3L:
  63         year = year - 1L
  64         month = month + 12L
  65     if year*10000L + month*100L + day > 15821014L:
  66         b = 2L - year/100L + year/400L
  67     return (1461L*year - yearCorr)/4L + 306001L*(month + 1L)/10000L + day + 1720994L + b
  68
  69
  70 def TodayDay():
  71     date = time.localtime(time.time())
  72     year = date[0]
  73     month = date[1]
  74     day = date[2]
  75     julian = julianDay(year, month, day)
  76     daywk = dayOfWeek(julian)
  77     daywk = day_name[daywk]
  78     return(daywk)
  79
  80 def FormatDay(value):
  81     date = FromFormat(value)
  82     daywk = DateCalc.dayOfWeek(date)
  83     daywk = day_name[daywk]
  84     return(daywk)
  85
  86 def FromJulian(julian):
  87     julian = long(julian)
  88     if (julian < 2299160L):
  89         b = julian + 1525L
  90     else:
  91         alpha = (4L*julian - 7468861L)/146097L
  92         b = julian + 1526L + alpha - alpha/4L
  93     c = (20L*b - 2442L)/7305L
  94     d = 1461L*c/4L
  95     e = 10000L*(b - d)/306001L
  96     day = int(b - d - 306001L*e/10000L)
  97     if e < 14L:
  98         month = int(e - 1L)
  99     else:
 100         month = int(e - 13L)
 101     if month > 2:
 102         year = c - 4716L
 103     else:
 104         year = c - 4715L
 105     year = int(year)
 106     return year, month, day
 107
 108 def dayOfWeek(julian):
 109     return int((julian + 1L)%7L)
 110
 111 def daysPerMonth(month, year):
 112     ndays = mdays[month] + (month == 2 and isleap(year))
 113     return ndays
 114
 115 class now:
 116     def __init__(self):
 117         self.date = time.localtime(time.time())
 118         self.year = self.date[0]
 119         self.month = self.date[1]
 120         self.day = self.date[2]
 121
 122 class Date:
 123     def __init__(self, year, month, day):
 124         self.julian = julianDay(year, month, day)
 125         self.month = month
 126         self.year = int(year)
 127         self.day_of_week = dayOfWeek(self.julian)
 128         self.days_in_month = daysPerMonth(self.month, self.year)
 129