4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync timegm implementation
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This program and the accompanying materials are licensed and made available under
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the terms and conditions of the BSD License that accompanies this distribution.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The full text of the license may be found at
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Copyright (c) 1987, 1989 Regents of the University of California.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * All rights reserved.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This code is derived from software contributed to Berkeley by
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Arthur David Olson of the National Cancer Institute.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * Redistribution and use in source and binary forms, with or without
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * modification, are permitted provided that the following conditions
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 1. Redistributions of source code must retain the above copyright
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * notice, this list of conditions and the following disclaimer.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * 2. Redistributions in binary form must reproduce the above copyright
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4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * California, Berkeley and its contributors.
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4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * SUCH DAMAGE.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsyncstatic char *sccsid = "from: @(#)ctime.c 5.26 (Berkeley) 2/23/91";
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This implementation of mktime is lifted straight from the NetBSD (BSD 4.4)
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * version. I modified it slightly to divorce it from the internals of the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * ctime library. Thus this version can't use details of the internal
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * timezone state file to figure out strange unnormalized struct tm values,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * as might result from someone doing date math on the tm struct then passing
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * it to mktime.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * It just does as well as it can at normalizing the tm input, then does a
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * binary search of the time space using the system's localtime() function.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * The original binary search was defective in that it didn't consider the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * setting of tm_isdst when comparing tm values, causing the search to be
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * flubbed for times near the dst/standard time changeover. The original
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * code seems to make up for this by grubbing through the timezone info
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * whenever the binary search barfed. Since I don't have that luxury in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * portable code, I have to take care of tm_isdst in the comparison routine.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * This requires knowing how many minutes offset dst is from standard time.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * So, if you live somewhere in the world where dst is not 60 minutes offset,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * and your vendor doesn't supply mktime(), you'll have to edit this variable
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync * by hand. Sorry about that.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync $NetBSD: mktime.c,v 1.4 2006/06/11 19:34:10 kardel Exp $
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This funciton is in Time.c, which has a different license than timegm.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsynctime2(struct tm * const tmp, void (* const funcp)(const time_t*, long, struct tm*),
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync This funciton is in Time.c, which has a different license than timegm.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync#endif /* !defined WRONG */
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Convert a tm structure to a GMT based time_t.