mirror of
https://github.com/python/cpython.git
synced 2025-10-31 13:41:24 +00:00
80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
# Parse a timezone specification.
|
|
# XXX Unfinished.
|
|
# XXX Only the typical form "XXXhhYYY;ddd/hh,ddd/hh" is currently supported.
|
|
|
|
tzpat = '^\([A-Z][A-Z][A-Z]\)\([-+]?[0-9]+\)\([A-Z][A-Z][A-Z]\);' + \
|
|
'\([0-9]+\)/\([0-9]+\),\([0-9]+\)/\([0-9]+\)$'
|
|
|
|
tzprog = None
|
|
|
|
def tzparse(tzstr):
|
|
global tzprog
|
|
if tzprog == None:
|
|
import regex
|
|
tzprog = regex.compile(tzpat)
|
|
if tzprog.match(tzstr) < 0:
|
|
raise ValueError, 'not the TZ syntax I understand'
|
|
regs = tzprog.regs
|
|
subs = []
|
|
for i in range(1, 8):
|
|
a, b = regs[i]
|
|
subs.append(tzstr[a:b])
|
|
for i in (1, 3, 4, 5, 6):
|
|
subs[i] = eval(subs[i])
|
|
[tzname, delta, dstname, daystart, hourstart, dayend, hourend] = subs
|
|
return (tzname, delta, dstname, daystart, hourstart, dayend, hourend)
|
|
|
|
def tzlocaltime(secs, params):
|
|
import time
|
|
(tzname, delta, dstname, daystart, hourstart, dayend, hourend) = params
|
|
year, month, days, hours, mins, secs, yday, wday, isdst = \
|
|
time.gmtime(secs - delta*3600)
|
|
if (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend):
|
|
tzname = dstname
|
|
hours = hours + 1
|
|
return year, month, days, hours, mins, secs, yday, wday, tzname
|
|
|
|
def tzset():
|
|
global tzparams, timezone, altzone, daylight, tzname
|
|
import os
|
|
tzstr = os.environ['TZ']
|
|
tzparams = tzparse(tzstr)
|
|
timezone = tzparams[1] * 3600
|
|
altzone = timezone - 3600
|
|
daylight = 1
|
|
tzname = tzparams[0], tzparams[2]
|
|
|
|
def isdst(secs):
|
|
import time
|
|
(tzname, delta, dstname, daystart, hourstart, dayend, hourend) = \
|
|
tzparams
|
|
year, month, days, hours, mins, secs, yday, wday, isdst = \
|
|
time.gmtime(secs - delta*3600)
|
|
return (daystart, hourstart) <= (yday+1, hours) < (dayend, hourend)
|
|
|
|
tzset()
|
|
|
|
def localtime(secs):
|
|
return tzlocaltime(secs, tzparams)
|
|
|
|
def test():
|
|
from time import asctime, gmtime
|
|
import time, sys
|
|
now = time.time()
|
|
x = localtime(now)
|
|
tm = x[:-1] + (0,)
|
|
print 'now =', now, '=', asctime(tm), x[-1]
|
|
now = now - now % (24*3600)
|
|
if sys.argv[1:]: now = now + eval(sys.argv[1])
|
|
x = gmtime(now)
|
|
tm = x[:-1] + (0,)
|
|
print 'gmtime =', now, '=', asctime(tm), 'yday =', x[-2]
|
|
jan1 = now - x[-2]*24*3600
|
|
x = localtime(jan1)
|
|
tm = x[:-1] + (0,)
|
|
print 'jan1 =', jan1, '=', asctime(tm), x[-1]
|
|
for d in range(85, 95) + range(265, 275):
|
|
t = jan1 + d*24*3600
|
|
x = localtime(t)
|
|
tm = x[:-1] + (0,)
|
|
print 'd =', d, 't =', t, '=', asctime(tm), x[-1]
|