239 lines
9.3 KiB
C
239 lines
9.3 KiB
C
/* Portions are Copyright (C) 2011 Google Inc */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Netscape Portable Runtime (NSPR).
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998-2000
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/*
|
|
*---------------------------------------------------------------------------
|
|
*
|
|
* prtime.h --
|
|
*
|
|
* NSPR date and time functions
|
|
* CVS revision 3.10
|
|
* This file contains definitions of NSPR's basic types required by
|
|
* prtime.cc. These types have been copied over from the following NSPR
|
|
* files prtime.h, prtypes.h(CVS revision 3.35), prlong.h(CVS revision 3.13)
|
|
*
|
|
*---------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef BASE_PRTIME_H__
|
|
#define BASE_PRTIME_H__
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/third_party/nspr/prtypes.h"
|
|
|
|
#define PR_ASSERT DCHECK
|
|
|
|
#define LL_I2L(l, i) ((l) = (PRInt64)(i))
|
|
#define LL_MUL(r, a, b) ((r) = (a) * (b))
|
|
|
|
/**********************************************************************/
|
|
/************************* TYPES AND CONSTANTS ************************/
|
|
/**********************************************************************/
|
|
|
|
#define PR_MSEC_PER_SEC 1000UL
|
|
#define PR_USEC_PER_SEC 1000000UL
|
|
#define PR_NSEC_PER_SEC 1000000000UL
|
|
#define PR_USEC_PER_MSEC 1000UL
|
|
#define PR_NSEC_PER_MSEC 1000000UL
|
|
|
|
/*
|
|
* PRTime --
|
|
*
|
|
* NSPR represents basic time as 64-bit signed integers relative
|
|
* to midnight (00:00:00), January 1, 1970 Greenwich Mean Time (GMT).
|
|
* (GMT is also known as Coordinated Universal Time, UTC.)
|
|
* The units of time are in microseconds. Negative times are allowed
|
|
* to represent times prior to the January 1970 epoch. Such values are
|
|
* intended to be exported to other systems or converted to human
|
|
* readable form.
|
|
*
|
|
* Notes on porting: PRTime corresponds to time_t in ANSI C. NSPR 1.0
|
|
* simply uses PRInt64.
|
|
*/
|
|
|
|
typedef PRInt64 PRTime;
|
|
|
|
/*
|
|
* Time zone and daylight saving time corrections applied to GMT to
|
|
* obtain the local time of some geographic location
|
|
*/
|
|
|
|
typedef struct PRTimeParameters {
|
|
PRInt32 tp_gmt_offset; /* the offset from GMT in seconds */
|
|
PRInt32 tp_dst_offset; /* contribution of DST in seconds */
|
|
} PRTimeParameters;
|
|
|
|
/*
|
|
* PRExplodedTime --
|
|
*
|
|
* Time broken down into human-readable components such as year, month,
|
|
* day, hour, minute, second, and microsecond. Time zone and daylight
|
|
* saving time corrections may be applied. If they are applied, the
|
|
* offsets from the GMT must be saved in the 'tm_params' field so that
|
|
* all the information is available to reconstruct GMT.
|
|
*
|
|
* Notes on porting: PRExplodedTime corrresponds to struct tm in
|
|
* ANSI C, with the following differences:
|
|
* - an additional field tm_usec;
|
|
* - replacing tm_isdst by tm_params;
|
|
* - the month field is spelled tm_month, not tm_mon;
|
|
* - we use absolute year, AD, not the year since 1900.
|
|
* The corresponding type in NSPR 1.0 is called PRTime. Below is
|
|
* a table of date/time type correspondence in the three APIs:
|
|
* API time since epoch time in components
|
|
* ANSI C time_t struct tm
|
|
* NSPR 1.0 PRInt64 PRTime
|
|
* NSPR 2.0 PRTime PRExplodedTime
|
|
*/
|
|
|
|
typedef struct PRExplodedTime {
|
|
PRInt32 tm_usec; /* microseconds past tm_sec (0-99999) */
|
|
PRInt32 tm_sec; /* seconds past tm_min (0-61, accomodating
|
|
up to two leap seconds) */
|
|
PRInt32 tm_min; /* minutes past tm_hour (0-59) */
|
|
PRInt32 tm_hour; /* hours past tm_day (0-23) */
|
|
PRInt32 tm_mday; /* days past tm_mon (1-31, note that it
|
|
starts from 1) */
|
|
PRInt32 tm_month; /* months past tm_year (0-11, Jan = 0) */
|
|
PRInt16 tm_year; /* absolute year, AD (note that we do not
|
|
count from 1900) */
|
|
|
|
PRInt8 tm_wday; /* calculated day of the week
|
|
(0-6, Sun = 0) */
|
|
PRInt16 tm_yday; /* calculated day of the year
|
|
(0-365, Jan 1 = 0) */
|
|
|
|
PRTimeParameters tm_params; /* time parameters used by conversion */
|
|
} PRExplodedTime;
|
|
|
|
/*
|
|
* PRTimeParamFn --
|
|
*
|
|
* A function of PRTimeParamFn type returns the time zone and
|
|
* daylight saving time corrections for some geographic location,
|
|
* given the current time in GMT. The input argument gmt should
|
|
* point to a PRExplodedTime that is in GMT, i.e., whose
|
|
* tm_params contains all 0's.
|
|
*
|
|
* For any time zone other than GMT, the computation is intended to
|
|
* consist of two steps:
|
|
* - Figure out the time zone correction, tp_gmt_offset. This number
|
|
* usually depends on the geographic location only. But it may
|
|
* also depend on the current time. For example, all of China
|
|
* is one time zone right now. But this situation may change
|
|
* in the future.
|
|
* - Figure out the daylight saving time correction, tp_dst_offset.
|
|
* This number depends on both the geographic location and the
|
|
* current time. Most of the DST rules are expressed in local
|
|
* current time. If so, one should apply the time zone correction
|
|
* to GMT before applying the DST rules.
|
|
*/
|
|
|
|
typedef PRTimeParameters (PR_CALLBACK *PRTimeParamFn)(const PRExplodedTime *gmt);
|
|
|
|
/**********************************************************************/
|
|
/****************************** FUNCTIONS *****************************/
|
|
/**********************************************************************/
|
|
|
|
NSPR_API(PRTime)
|
|
PR_ImplodeTime(const PRExplodedTime *exploded);
|
|
|
|
/*
|
|
* Adjust exploded time to normalize field overflows after manipulation.
|
|
* Note that the following fields of PRExplodedTime should not be
|
|
* manipulated:
|
|
* - tm_month and tm_year: because the number of days in a month and
|
|
* number of days in a year are not constant, it is ambiguous to
|
|
* manipulate the month and year fields, although one may be tempted
|
|
* to. For example, what does "a month from January 31st" mean?
|
|
* - tm_wday and tm_yday: these fields are calculated by NSPR. Users
|
|
* should treat them as "read-only".
|
|
*/
|
|
|
|
NSPR_API(void) PR_NormalizeTime(
|
|
PRExplodedTime *exploded, PRTimeParamFn params);
|
|
|
|
/**********************************************************************/
|
|
/*********************** TIME PARAMETER FUNCTIONS *********************/
|
|
/**********************************************************************/
|
|
|
|
/* Time parameters that represent Greenwich Mean Time */
|
|
NSPR_API(PRTimeParameters) PR_GMTParameters(const PRExplodedTime *gmt);
|
|
|
|
/*
|
|
* This parses a time/date string into a PRTime
|
|
* (microseconds after "1-Jan-1970 00:00:00 GMT").
|
|
* It returns PR_SUCCESS on success, and PR_FAILURE
|
|
* if the time/date string can't be parsed.
|
|
*
|
|
* Many formats are handled, including:
|
|
*
|
|
* 14 Apr 89 03:20:12
|
|
* 14 Apr 89 03:20 GMT
|
|
* Fri, 17 Mar 89 4:01:33
|
|
* Fri, 17 Mar 89 4:01 GMT
|
|
* Mon Jan 16 16:12 PDT 1989
|
|
* Mon Jan 16 16:12 +0130 1989
|
|
* 6 May 1992 16:41-JST (Wednesday)
|
|
* 22-AUG-1993 10:59:12.82
|
|
* 22-AUG-1993 10:59pm
|
|
* 22-AUG-1993 12:59am
|
|
* 22-AUG-1993 12:59 PM
|
|
* Friday, August 04, 1995 3:54 PM
|
|
* 06/21/95 04:24:34 PM
|
|
* 20/06/95 21:07
|
|
* 95-06-08 19:32:48 EDT
|
|
*
|
|
* If the input string doesn't contain a description of the timezone,
|
|
* we consult the `default_to_gmt' to decide whether the string should
|
|
* be interpreted relative to the local time zone (PR_FALSE) or GMT (PR_TRUE).
|
|
* The correct value for this argument depends on what standard specified
|
|
* the time string which you are parsing.
|
|
*/
|
|
|
|
/*
|
|
* This is the only funtion that should be called from outside base, and only
|
|
* from the unit test.
|
|
*/
|
|
|
|
BASE_EXPORT PRStatus PR_ParseTimeString (
|
|
const char *string,
|
|
PRBool default_to_gmt,
|
|
PRTime *result);
|
|
|
|
#endif // BASE_PRTIME_H__
|