Restore Python 2.5 compatibility.

Signed-off-by: Eric S. Raymond <esr@thyrsus.com>

1 files changed, 24 insertions, 3 deletions

diff --git a/leapsecond.py b/leapsecond.py
index 2059f6c4..cdacdb46 100755
--- a/leapsecond.py
+++ b/leapsecond.py
@@ -24,7 +24,6 @@
 # BSD terms apply: see the file COPYING in the distribution root for details.
 #
 import os, urllib, re, random, time, calendar, math, sys
-import gps.misc
 
 __locations = [
     (
@@ -48,6 +47,28 @@ __locations = [
 # between times it might change, in seconds since Unix epoch GMT.
 __cachepath = "/var/run/leapsecond"
 
+def isotime(s):
+    "Convert timestamps in ISO8661 format to and from Unix time."
+    if type(s) == type(1):
+        return time.strftime("%Y-%m-%dT%H:%M:%S", time.gmtime(s))
+    elif type(s) == type(1.0):
+        date = int(s)
+        msec = s - date
+        date = time.strftime("%Y-%m-%dT%H:%M:%S", time.gmtime(s))
+        return date + "." + repr(msec)[3:]
+    elif type(s) == type("") or type(s) == type(u""):
+        if s[-1] == "Z":
+            s = s[:-1]
+        if "." in s:
+            (date, msec) = s.split(".")
+        else:
+            date = s
+            msec = "0"
+        # Note: no leap-second correction!
+        return calendar.timegm(time.strptime(date, "%Y-%m-%dT%H:%M:%S")) + float("0." + msec)
+    else:
+        raise TypeError
+
 def retrieve():
     "Retrieve current leap-second from Web sources."
     random.shuffle(__locations)	# To spread the load
@@ -261,10 +282,10 @@ if __name__ == '__main__':
             print unix_to_rfc822(float(val))
             raise SystemExit, 0
         elif (switch == '-I'):  # Compute Unix time from ISO8601 date
-            print gps.misc.isotime(val)
+            print isotime(val)
             raise SystemExit, 0
         elif (switch == '-O'):  # Compute ISO8601 date from Unix time
-            print gps.misc.isotime(float(val))
+            print isotime(float(val))
             raise SystemExit, 0
 
         print "Current leap second:", retrieve()