Delete bundled copy of NSS and replace with README.

nspr/pr/include/prtime.h

Index: nspr/pr/include/prtime.h
diff --git a/nspr/pr/include/prtime.h b/nspr/pr/include/prtime.h
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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-/*
- *----------------------------------------------------------------------
- *
- * prtime.h --
- *
- *     NSPR date and time functions
- *
- *-----------------------------------------------------------------------
- */
-
-#ifndef prtime_h___
-#define prtime_h___
-
-#include "prlong.h"
-
-PR_BEGIN_EXTERN_C
-
-/**********************************************************************/
-/************************* TYPES AND CONSTANTS ************************/
-/**********************************************************************/
-
-#define PR_MSEC_PER_SEC		1000L
-#define PR_USEC_PER_SEC		1000000L
-#define PR_NSEC_PER_SEC		1000000000L
-#define PR_USEC_PER_MSEC	1000L
-#define PR_NSEC_PER_MSEC	1000000L
-
-/*
- * 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 *****************************/
-/**********************************************************************/
-
-/*
- * The PR_Now routine returns the current time relative to the
- * epoch, midnight, January 1, 1970 UTC. The units of the returned
- * value are microseconds since the epoch.
- *
- * The values returned are not guaranteed to advance in a linear fashion
- * due to the application of time correction protocols which synchronize
- * computer clocks to some external time source. Consequently it should
- * not be depended on for interval timing.
- *
- * The implementation is machine dependent.
- * Cf. time_t time(time_t *tp) in ANSI C.
- */
-NSPR_API(PRTime)
-PR_Now(void);
-
-/*
- * Expand time binding it to time parameters provided by PRTimeParamFn.
- * The calculation is envisoned to proceed in the following steps:
- *   - From given PRTime, calculate PRExplodedTime in GMT
- *   - Apply the given PRTimeParamFn to the GMT that we just calculated
- *     to obtain PRTimeParameters.
- *   - Add the PRTimeParameters offsets to GMT to get the local time
- *     as PRExplodedTime.
- */
-
-NSPR_API(void) PR_ExplodeTime(
-    PRTime usecs, PRTimeParamFn params, PRExplodedTime *exploded);
-
-/* Reverse operation of PR_ExplodeTime */
-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 suit current host machine */
-NSPR_API(PRTimeParameters) PR_LocalTimeParameters(const PRExplodedTime *gmt);
-
-/* Time parameters that represent Greenwich Mean Time */
-NSPR_API(PRTimeParameters) PR_GMTParameters(const PRExplodedTime *gmt);
-
-/*
- * Time parameters that represent the US Pacific Time Zone, with the
- * current daylight saving time rules (for testing only)
- */
-NSPR_API(PRTimeParameters) PR_USPacificTimeParameters(const PRExplodedTime *gmt);
-
-/*
- * This parses a time/date string into a PRExplodedTime
- * struct. It populates all fields but it can't split
- * the offset from UTC into tp_gmt_offset and tp_dst_offset in
- * most cases (exceptions: PST/PDT, MST/MDT, CST/CDT, EST/EDT, GMT/BST).
- * In those cases tp_gmt_offset will be the sum of these two and
- * tp_dst_offset will be 0.
- * 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.
- */
-
-NSPR_API(PRStatus) PR_ParseTimeStringToExplodedTime (
-        const char *string,
-        PRBool default_to_gmt,
-        PRExplodedTime *result);
-
-/*
- * This uses PR_ParseTimeStringToExplodedTime to parse
- * a time/date string and PR_ImplodeTime to transform it 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.
- */
-
-NSPR_API(PRStatus) PR_ParseTimeString (
-	const char *string,
-	PRBool default_to_gmt,
-	PRTime *result);
-
-/* Format a time value into a buffer. Same semantics as strftime() */
-NSPR_API(PRUint32) PR_FormatTime(char *buf, int buflen, const char *fmt,
-                                 const PRExplodedTime *time);
-
-/* Format a time value into a buffer. Time is always in US English format,
- * regardless of locale setting.
- */
-NSPR_API(PRUint32)
-PR_FormatTimeUSEnglish(char *buf, PRUint32 bufSize,
-                       const char *format, const PRExplodedTime *time);
-
-PR_END_EXTERN_C
-
-#endif /* prtime_h___ */