From 70e0cd6ba43b379183e1b2f6a02196c55c5a0c66 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sun, 5 Jun 2011 13:38:50 -0600
Subject: [PATCH] When writing files to zipfile, reset timestamp if it doesn't
 fit in 1980's vintage storage structures

---
 src/calibre/utils/zipfile.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/calibre/utils/zipfile.py b/src/calibre/utils/zipfile.py
index fa15bff4b4..394b667bbf 100644
--- a/src/calibre/utils/zipfile.py
+++ b/src/calibre/utils/zipfile.py
@@ -340,7 +340,14 @@ class ZipInfo (object):
         """Return the per-file header as a string."""
         dt = self.date_time
         dosdate = (dt[0] - 1980) << 9 | dt[1] << 5 | dt[2]
+        # Added by Kovid to reset timestamp to default if it overflows the DOS
+        # limits
+        if dosdate > 0xffff or dosdate < 0:
+            dosdate = 0
         dostime = dt[3] << 11 | dt[4] << 5 | (dt[5] // 2)
+        if dostime > 0xffff or dostime < 0:
+            dostime = 0
+
         if self.flag_bits & 0x08:
             # Set these to zero because we write them after the file data
             CRC = compress_size = file_size = 0