1 files changed, 98 insertions, 0 deletions
diff --git a/Lib/lib-old/tzparse.py b/Lib/lib-old/tzparse.py
new file mode 100644
index 0000000..12468b5
--- /dev/null
+++ b/Lib/lib-old/tzparse.py
@@ -0,0 +1,98 @@
+"""Parse a timezone specification."""
+
+# XXX Unfinished.
+# XXX Only the typical form "XXXhhYYY;ddd/hh,ddd/hh" is currently supported.
+
+import warnings
+warnings.warn(
+    "The tzparse module is obsolete and will disappear in the future",
+    DeprecationWarning)
+
+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):
+    """Given a timezone spec, return a tuple of information
+    (tzname, delta, dstname, daystart, hourstart, dayend, hourend),
+    where 'tzname' is the name of the timezone, 'delta' is the offset
+    in hours from GMT, 'dstname' is the name of the daylight-saving
+    timezone, and 'daystart'/'hourstart' and 'dayend'/'hourend'
+    specify the starting and ending points for daylight saving time."""
+    global tzprog
+    if tzprog is None:
+        import re
+        tzprog = re.compile(tzpat)
+    match = tzprog.match(tzstr)
+    if not match:
+        raise ValueError, 'not the TZ syntax I understand'
+    subs = []
+    for i in range(1, 8):
+        subs.append(match.group(i))
+    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):
+    """Given a Unix time in seconds and a tuple of information about
+    a timezone as returned by tzparse(), return the local time in the
+    form (year, month, day, hour, min, sec, yday, wday, tzname)."""
+    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():
+    """Determine the current timezone from the "TZ" environment variable."""
+    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):
+    """Return true if daylight-saving time is in effect for the given
+    Unix time in the current timezone."""
+    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):
+    """Get the local time in the current timezone."""
+    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]