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Date spans that are negative show with negative year, month, and day

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svn: r11521
This commit is contained in:
Doug Blank 2008-12-27 16:07:36 +00:00
parent b206ca7cda
commit a11d819296
1 changed files with 18 additions and 4 deletions
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22
src/gen/lib/date.py
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@ -331,13 +331,18 @@ class Date:
date1 = self
date2 = other
negative = False
if d1 < d2:
d1, d2 = d2, d1
date1, date2 = date2, date1
negative = True
# d1 - d2 (1998, 12, 32) - (1982, 12, 15)
if date1.calendar != date2.calendar:
diff = date1.sortval - date2.sortval
return Span(diff/365, (diff % 365)/30, (diff % 365) % 30)
if negative:
return Span(diff/365, (diff % 365)/30, (diff % 365) % 30)
else:
return Span(-diff/365, -((diff % 365)/30), -((diff % 365) % 30))
# days:
if d2[2] > d1[2]:
# months:
@ -369,7 +374,10 @@ class Date:
eDate = eDate + (0, 0, diff)
if diff == 60:
return Span(-1, -1, -1)
return Span(years, months, days - diff)
if negative:
return Span(-years, -months, -(days - diff))
else:
return Span(years, months, days - diff)
elif eDate > date2:
diff = 0
while eDate >> date2 and diff > -60:
@ -377,9 +385,15 @@ class Date:
eDate = eDate - (0, 0, abs(diff))
if diff == -60:
return Span(-1, -1, -1)
return Span(years, months, days + diff)
if negative:
return Span(-years, -months, -(days + diff))
else:
return Span(years, months, days + diff)
else:
return Span(years, months, days)
if negative:
return Span(-years, -months, -days)
else:
return Span(years, months, days)
else:
raise AttributeError, "unknown date sub type: %s " % type(other)