d7ce700605
Add Posix functions for porting compatibility. Fix compliance issues with ISO/IEC 9899:199409 New Functions: setenv(), fparseln(), GetFileNameFromPath(), rename(), realpath(), setprogname(), getprogname(), strlcat(), strlcpy(), strsep(), setitimer(), getitimer(), timegm(), getopt(), basename(), mkstemp(), ffs(), vsnprintf(), snprintf(), getpass(), usleep(), select(), writev(), strcasecmp(), getcwd(), chdir(), tcgetpgrp(), getpgrp(), gettimeofday(), bcopy(), git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12061 6f19259b-4bc3-4df7-8a09-765794883524
113 lines
4.6 KiB
C
113 lines
4.6 KiB
C
/** @file
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timegm implementation
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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* Copyright (c) 1987, 1989 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Arthur David Olson of the National Cancer Institute.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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static char *sccsid = "from: @(#)ctime.c 5.26 (Berkeley) 2/23/91";
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* This implementation of mktime is lifted straight from the NetBSD (BSD 4.4)
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* version. I modified it slightly to divorce it from the internals of the
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* ctime library. Thus this version can't use details of the internal
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* timezone state file to figure out strange unnormalized struct tm values,
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* as might result from someone doing date math on the tm struct then passing
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* it to mktime.
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*
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* It just does as well as it can at normalizing the tm input, then does a
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* binary search of the time space using the system's localtime() function.
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*
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* The original binary search was defective in that it didn't consider the
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* setting of tm_isdst when comparing tm values, causing the search to be
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* flubbed for times near the dst/standard time changeover. The original
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* code seems to make up for this by grubbing through the timezone info
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* whenever the binary search barfed. Since I don't have that luxury in
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* portable code, I have to take care of tm_isdst in the comparison routine.
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* This requires knowing how many minutes offset dst is from standard time.
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*
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* So, if you live somewhere in the world where dst is not 60 minutes offset,
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* and your vendor doesn't supply mktime(), you'll have to edit this variable
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* by hand. Sorry about that.
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$NetBSD: mktime.c,v 1.4 2006/06/11 19:34:10 kardel Exp $
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**/
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#include <LibConfig.h>
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#include <time.h>
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/*
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This funciton is in Time.c, which has a different license than timegm.
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*/
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time_t
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time2(struct tm * const tmp, void (* const funcp)(const time_t*, long, struct tm*),
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const long offset, int * const okayp);
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/*
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This funciton is in Time.c, which has a different license than timegm.
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*/
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void
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gmtsub(
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const time_t * const timep,
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const long offset,
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struct tm * const tmp
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);
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#ifndef WRONG
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#define WRONG (-1)
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#endif /* !defined WRONG */
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/*
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Convert a tm structure to a GMT based time_t.
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*/
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time_t timegm( struct tm * tmp )
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{
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register time_t t;
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int okay;
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tmp->tm_isdst = 0;
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t = time2(tmp, gmtsub, 0, &okay);
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if (okay || tmp->tm_isdst < 0)
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return t;
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return WRONG;
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} |