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