LCOV - code coverage report
Current view: directory - nsprpub/pr/src/misc - prtime.c (source / functions) Found Hit Coverage
Test: app.info Lines: 833 394 47.3 %
Date: 2012-06-02 Functions: 18 14 77.8 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is the Netscape Portable Runtime (NSPR).
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998-2000
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      26                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : /*
      39                 :  * prtime.c --
      40                 :  *
      41                 :  *     NSPR date and time functions
      42                 :  *
      43                 :  */
      44                 : 
      45                 : #include "prinit.h"
      46                 : #include "prtime.h"
      47                 : #include "prlock.h"
      48                 : #include "prprf.h"
      49                 : #include "prlog.h"
      50                 : 
      51                 : #include <string.h>
      52                 : #include <ctype.h>
      53                 : #include <errno.h>  /* for EINVAL */
      54                 : #include <time.h>
      55                 : 
      56                 : /* 
      57                 :  * The COUNT_LEAPS macro counts the number of leap years passed by
      58                 :  * till the start of the given year Y.  At the start of the year 4
      59                 :  * A.D. the number of leap years passed by is 0, while at the start of
      60                 :  * the year 5 A.D. this count is 1. The number of years divisible by
      61                 :  * 100 but not divisible by 400 (the non-leap years) is deducted from
      62                 :  * the count to get the correct number of leap years.
      63                 :  *
      64                 :  * The COUNT_DAYS macro counts the number of days since 01/01/01 till the
      65                 :  * start of the given year Y. The number of days at the start of the year
      66                 :  * 1 is 0 while the number of days at the start of the year 2 is 365
      67                 :  * (which is ((2)-1) * 365) and so on. The reference point is 01/01/01
      68                 :  * midnight 00:00:00.
      69                 :  */
      70                 : 
      71                 : #define COUNT_LEAPS(Y)   ( ((Y)-1)/4 - ((Y)-1)/100 + ((Y)-1)/400 )
      72                 : #define COUNT_DAYS(Y)  ( ((Y)-1)*365 + COUNT_LEAPS(Y) )
      73                 : #define DAYS_BETWEEN_YEARS(A, B)  (COUNT_DAYS(B) - COUNT_DAYS(A))
      74                 : 
      75                 : /*
      76                 :  * Static variables used by functions in this file
      77                 :  */
      78                 : 
      79                 : /*
      80                 :  * The following array contains the day of year for the last day of
      81                 :  * each month, where index 1 is January, and day 0 is January 1.
      82                 :  */
      83                 : 
      84                 : static const int lastDayOfMonth[2][13] = {
      85                 :     {-1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364},
      86                 :     {-1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}
      87                 : };
      88                 : 
      89                 : /*
      90                 :  * The number of days in a month
      91                 :  */
      92                 : 
      93                 : static const PRInt8 nDays[2][12] = {
      94                 :     {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
      95                 :     {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
      96                 : };
      97                 : 
      98                 : /*
      99                 :  * Declarations for internal functions defined later in this file.
     100                 :  */
     101                 : 
     102                 : static void        ComputeGMT(PRTime time, PRExplodedTime *gmt);
     103                 : static int         IsLeapYear(PRInt16 year);
     104                 : static void        ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset);
     105                 : 
     106                 : /*
     107                 :  *------------------------------------------------------------------------
     108                 :  *
     109                 :  * ComputeGMT --
     110                 :  *
     111                 :  *     Caveats:
     112                 :  *     - we ignore leap seconds
     113                 :  *
     114                 :  *------------------------------------------------------------------------
     115                 :  */
     116                 : 
     117                 : static void
     118            7158 : ComputeGMT(PRTime time, PRExplodedTime *gmt)
     119                 : {
     120                 :     PRInt32 tmp, rem;
     121                 :     PRInt32 numDays;
     122                 :     PRInt64 numDays64, rem64;
     123                 :     int isLeap;
     124                 :     PRInt64 sec;
     125                 :     PRInt64 usec;
     126                 :     PRInt64 usecPerSec;
     127                 :     PRInt64 secPerDay;
     128                 : 
     129                 :     /*
     130                 :      * We first do the usec, sec, min, hour thing so that we do not
     131                 :      * have to do LL arithmetic.
     132                 :      */
     133                 : 
     134            7158 :     LL_I2L(usecPerSec, 1000000L);
     135            7158 :     LL_DIV(sec, time, usecPerSec);
     136            7158 :     LL_MOD(usec, time, usecPerSec);
     137            7158 :     LL_L2I(gmt->tm_usec, usec);
     138                 :     /* Correct for weird mod semantics so the remainder is always positive */
     139            7158 :     if (gmt->tm_usec < 0) {
     140                 :         PRInt64 one;
     141                 : 
     142               0 :         LL_I2L(one, 1L);
     143               0 :         LL_SUB(sec, sec, one);
     144               0 :         gmt->tm_usec += 1000000L;
     145                 :     }
     146                 : 
     147            7158 :     LL_I2L(secPerDay, 86400L);
     148            7158 :     LL_DIV(numDays64, sec, secPerDay);
     149            7158 :     LL_MOD(rem64, sec, secPerDay);
     150                 :     /* We are sure both of these numbers can fit into PRInt32 */
     151            7158 :     LL_L2I(numDays, numDays64);
     152            7158 :     LL_L2I(rem, rem64);
     153            7158 :     if (rem < 0) {
     154               0 :         numDays--;
     155               0 :         rem += 86400L;
     156                 :     }
     157                 : 
     158                 :     /* Compute day of week.  Epoch started on a Thursday. */
     159                 : 
     160            7158 :     gmt->tm_wday = (numDays + 4) % 7;
     161            7158 :     if (gmt->tm_wday < 0) {
     162               0 :         gmt->tm_wday += 7;
     163                 :     }
     164                 : 
     165                 :     /* Compute the time of day. */
     166                 : 
     167            7158 :     gmt->tm_hour = rem / 3600;
     168            7158 :     rem %= 3600;
     169            7158 :     gmt->tm_min = rem / 60;
     170            7158 :     gmt->tm_sec = rem % 60;
     171                 : 
     172                 :     /*
     173                 :      * Compute the year by finding the 400 year period, then working
     174                 :      * down from there.
     175                 :      *
     176                 :      * Since numDays is originally the number of days since January 1, 1970,
     177                 :      * we must change it to be the number of days from January 1, 0001.
     178                 :      */
     179                 : 
     180            7158 :     numDays += 719162;       /* 719162 = days from year 1 up to 1970 */
     181            7158 :     tmp = numDays / 146097;  /* 146097 = days in 400 years */
     182            7158 :     rem = numDays % 146097;
     183            7158 :     gmt->tm_year = tmp * 400 + 1;
     184                 : 
     185                 :     /* Compute the 100 year period. */
     186                 : 
     187            7158 :     tmp = rem / 36524;    /* 36524 = days in 100 years */
     188            7158 :     rem %= 36524;
     189            7158 :     if (tmp == 4) {       /* the 400th year is a leap year */
     190               0 :         tmp = 3;
     191               0 :         rem = 36524;
     192                 :     }
     193            7158 :     gmt->tm_year += tmp * 100;
     194                 : 
     195                 :     /* Compute the 4 year period. */
     196                 : 
     197            7158 :     tmp = rem / 1461;     /* 1461 = days in 4 years */
     198            7158 :     rem %= 1461;
     199            7158 :     gmt->tm_year += tmp * 4;
     200                 : 
     201                 :     /* Compute which year in the 4. */
     202                 : 
     203            7158 :     tmp = rem / 365;
     204            7158 :     rem %= 365;
     205            7158 :     if (tmp == 4) {       /* the 4th year is a leap year */
     206               0 :         tmp = 3;
     207               0 :         rem = 365;
     208                 :     }
     209                 : 
     210            7158 :     gmt->tm_year += tmp;
     211            7158 :     gmt->tm_yday = rem;
     212            7158 :     isLeap = IsLeapYear(gmt->tm_year);
     213                 : 
     214                 :     /* Compute the month and day of month. */
     215                 : 
     216            7158 :     for (tmp = 1; lastDayOfMonth[isLeap][tmp] < gmt->tm_yday; tmp++) {
     217                 :     }
     218            7158 :     gmt->tm_month = --tmp;
     219            7158 :     gmt->tm_mday = gmt->tm_yday - lastDayOfMonth[isLeap][tmp];
     220                 : 
     221            7158 :     gmt->tm_params.tp_gmt_offset = 0;
     222            7158 :     gmt->tm_params.tp_dst_offset = 0;
     223            7158 : }
     224                 : 
     225                 : 
     226                 : /*
     227                 :  *------------------------------------------------------------------------
     228                 :  *
     229                 :  * PR_ExplodeTime --
     230                 :  *
     231                 :  *     Cf. struct tm *gmtime(const time_t *tp) and
     232                 :  *         struct tm *localtime(const time_t *tp)
     233                 :  *
     234                 :  *------------------------------------------------------------------------
     235                 :  */
     236                 : 
     237                 : PR_IMPLEMENT(void)
     238            7158 : PR_ExplodeTime(
     239                 :         PRTime usecs,
     240                 :         PRTimeParamFn params,
     241                 :         PRExplodedTime *exploded)
     242                 : {
     243            7158 :     ComputeGMT(usecs, exploded);
     244            7158 :     exploded->tm_params = params(exploded);
     245           14316 :     ApplySecOffset(exploded, exploded->tm_params.tp_gmt_offset
     246            7158 :             + exploded->tm_params.tp_dst_offset);
     247            7158 : }
     248                 : 
     249                 : 
     250                 : /*
     251                 :  *------------------------------------------------------------------------
     252                 :  *
     253                 :  * PR_ImplodeTime --
     254                 :  *
     255                 :  *     Cf. time_t mktime(struct tm *tp)
     256                 :  *     Note that 1 year has < 2^25 seconds.  So an PRInt32 is large enough.
     257                 :  *
     258                 :  *------------------------------------------------------------------------
     259                 :  */
     260                 : PR_IMPLEMENT(PRTime)
     261            9256 : PR_ImplodeTime(const PRExplodedTime *exploded)
     262                 : {
     263                 :     PRExplodedTime copy;
     264                 :     PRTime retVal;
     265                 :     PRInt64 secPerDay, usecPerSec;
     266                 :     PRInt64 temp;
     267                 :     PRInt64 numSecs64;
     268                 :     PRInt32 numDays;
     269                 :     PRInt32 numSecs;
     270                 : 
     271                 :     /* Normalize first.  Do this on our copy */
     272            9256 :     copy = *exploded;
     273            9256 :     PR_NormalizeTime(&copy, PR_GMTParameters);
     274                 : 
     275            9256 :     numDays = DAYS_BETWEEN_YEARS(1970, copy.tm_year);
     276                 :     
     277           18512 :     numSecs = copy.tm_yday * 86400 + copy.tm_hour * 3600
     278            9256 :             + copy.tm_min * 60 + copy.tm_sec;
     279                 : 
     280            9256 :     LL_I2L(temp, numDays);
     281            9256 :     LL_I2L(secPerDay, 86400);
     282            9256 :     LL_MUL(temp, temp, secPerDay);
     283            9256 :     LL_I2L(numSecs64, numSecs);
     284            9256 :     LL_ADD(numSecs64, numSecs64, temp);
     285                 : 
     286                 :     /* apply the GMT and DST offsets */
     287            9256 :     LL_I2L(temp,  copy.tm_params.tp_gmt_offset);
     288            9256 :     LL_SUB(numSecs64, numSecs64, temp);
     289            9256 :     LL_I2L(temp,  copy.tm_params.tp_dst_offset);
     290            9256 :     LL_SUB(numSecs64, numSecs64, temp);
     291                 : 
     292            9256 :     LL_I2L(usecPerSec, 1000000L);
     293            9256 :     LL_MUL(temp, numSecs64, usecPerSec);
     294            9256 :     LL_I2L(retVal, copy.tm_usec);
     295            9256 :     LL_ADD(retVal, retVal, temp);
     296                 : 
     297            9256 :     return retVal;
     298                 : }
     299                 : 
     300                 : /*
     301                 :  *-------------------------------------------------------------------------
     302                 :  *
     303                 :  * IsLeapYear --
     304                 :  *
     305                 :  *     Returns 1 if the year is a leap year, 0 otherwise.
     306                 :  *
     307                 :  *-------------------------------------------------------------------------
     308                 :  */
     309                 : 
     310           31192 : static int IsLeapYear(PRInt16 year)
     311                 : {
     312           31192 :     if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
     313           29352 :         return 1;
     314                 :     else
     315            1840 :         return 0;
     316                 : }
     317                 : 
     318                 : /*
     319                 :  * 'secOffset' should be less than 86400 (i.e., a day).
     320                 :  * 'time' should point to a normalized PRExplodedTime.
     321                 :  */
     322                 : 
     323                 : static void
     324           18854 : ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset)
     325                 : {
     326           18854 :     time->tm_sec += secOffset;
     327                 : 
     328                 :     /* Note that in this implementation we do not count leap seconds */
     329           18854 :     if (time->tm_sec < 0 || time->tm_sec >= 60) {
     330            6958 :         time->tm_min += time->tm_sec / 60;
     331            6958 :         time->tm_sec %= 60;
     332            6958 :         if (time->tm_sec < 0) {
     333            6544 :             time->tm_sec += 60;
     334            6544 :             time->tm_min--;
     335                 :         }
     336                 :     }
     337                 : 
     338           18854 :     if (time->tm_min < 0 || time->tm_min >= 60) {
     339            6958 :         time->tm_hour += time->tm_min / 60;
     340            6958 :         time->tm_min %= 60;
     341            6958 :         if (time->tm_min < 0) {
     342            6637 :             time->tm_min += 60;
     343            6637 :             time->tm_hour--;
     344                 :         }
     345                 :     }
     346                 : 
     347           18854 :     if (time->tm_hour < 0) {
     348                 :         /* Decrement mday, yday, and wday */
     349             321 :         time->tm_hour += 24;
     350             321 :         time->tm_mday--;
     351             321 :         time->tm_yday--;
     352             321 :         if (time->tm_mday < 1) {
     353             321 :             time->tm_month--;
     354             321 :             if (time->tm_month < 0) {
     355             321 :                 time->tm_month = 11;
     356             321 :                 time->tm_year--;
     357             321 :                 if (IsLeapYear(time->tm_year))
     358               0 :                     time->tm_yday = 365;
     359                 :                 else
     360             321 :                     time->tm_yday = 364;
     361                 :             }
     362             321 :             time->tm_mday = nDays[IsLeapYear(time->tm_year)][time->tm_month];
     363                 :         }
     364             321 :         time->tm_wday--;
     365             321 :         if (time->tm_wday < 0)
     366               0 :             time->tm_wday = 6;
     367           18533 :     } else if (time->tm_hour > 23) {
     368                 :         /* Increment mday, yday, and wday */
     369               0 :         time->tm_hour -= 24;
     370               0 :         time->tm_mday++;
     371               0 :         time->tm_yday++;
     372               0 :         if (time->tm_mday >
     373               0 :                 nDays[IsLeapYear(time->tm_year)][time->tm_month]) {
     374               0 :             time->tm_mday = 1;
     375               0 :             time->tm_month++;
     376               0 :             if (time->tm_month > 11) {
     377               0 :                 time->tm_month = 0;
     378               0 :                 time->tm_year++;
     379               0 :                 time->tm_yday = 0;
     380                 :             }
     381                 :         }
     382               0 :         time->tm_wday++;
     383               0 :         if (time->tm_wday > 6)
     384               0 :             time->tm_wday = 0;
     385                 :     }
     386           18854 : }
     387                 : 
     388                 : PR_IMPLEMENT(void)
     389           11696 : PR_NormalizeTime(PRExplodedTime *time, PRTimeParamFn params)
     390                 : {
     391                 :     int daysInMonth;
     392                 :     PRInt32 numDays;
     393                 : 
     394                 :     /* Get back to GMT */
     395           23392 :     time->tm_sec -= time->tm_params.tp_gmt_offset
     396           11696 :             + time->tm_params.tp_dst_offset;
     397           11696 :     time->tm_params.tp_gmt_offset = 0;
     398           11696 :     time->tm_params.tp_dst_offset = 0;
     399                 : 
     400                 :     /* Now normalize GMT */
     401                 : 
     402           11696 :     if (time->tm_usec < 0 || time->tm_usec >= 1000000) {
     403               0 :         time->tm_sec +=  time->tm_usec / 1000000;
     404               0 :         time->tm_usec %= 1000000;
     405               0 :         if (time->tm_usec < 0) {
     406               0 :             time->tm_usec += 1000000;
     407               0 :             time->tm_sec--;
     408                 :         }
     409                 :     }
     410                 : 
     411                 :     /* Note that we do not count leap seconds in this implementation */
     412           11696 :     if (time->tm_sec < 0 || time->tm_sec >= 60) {
     413             182 :         time->tm_min += time->tm_sec / 60;
     414             182 :         time->tm_sec %= 60;
     415             182 :         if (time->tm_sec < 0) {
     416               0 :             time->tm_sec += 60;
     417               0 :             time->tm_min--;
     418                 :         }
     419                 :     }
     420                 : 
     421           11696 :     if (time->tm_min < 0 || time->tm_min >= 60) {
     422             182 :         time->tm_hour += time->tm_min / 60;
     423             182 :         time->tm_min %= 60;
     424             182 :         if (time->tm_min < 0) {
     425               0 :             time->tm_min += 60;
     426               0 :             time->tm_hour--;
     427                 :         }
     428                 :     }
     429                 : 
     430           11696 :     if (time->tm_hour < 0 || time->tm_hour >= 24) {
     431               0 :         time->tm_mday += time->tm_hour / 24;
     432               0 :         time->tm_hour %= 24;
     433               0 :         if (time->tm_hour < 0) {
     434               0 :             time->tm_hour += 24;
     435               0 :             time->tm_mday--;
     436                 :         }
     437                 :     }
     438                 : 
     439                 :     /* Normalize month and year before mday */
     440           11696 :     if (time->tm_month < 0 || time->tm_month >= 12) {
     441               0 :         time->tm_year += time->tm_month / 12;
     442               0 :         time->tm_month %= 12;
     443               0 :         if (time->tm_month < 0) {
     444               0 :             time->tm_month += 12;
     445               0 :             time->tm_year--;
     446                 :         }
     447                 :     }
     448                 : 
     449                 :     /* Now that month and year are in proper range, normalize mday */
     450                 : 
     451           11696 :     if (time->tm_mday < 1) {
     452                 :         /* mday too small */
     453                 :         do {
     454                 :             /* the previous month */
     455               0 :             time->tm_month--;
     456               0 :             if (time->tm_month < 0) {
     457               0 :                 time->tm_month = 11;
     458               0 :                 time->tm_year--;
     459                 :             }
     460               0 :             time->tm_mday += nDays[IsLeapYear(time->tm_year)][time->tm_month];
     461               0 :         } while (time->tm_mday < 1);
     462                 :     } else {
     463           11696 :         daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
     464           23392 :         while (time->tm_mday > daysInMonth) {
     465                 :             /* mday too large */
     466               0 :             time->tm_mday -= daysInMonth;
     467               0 :             time->tm_month++;
     468               0 :             if (time->tm_month > 11) {
     469               0 :                 time->tm_month = 0;
     470               0 :                 time->tm_year++;
     471                 :             }
     472               0 :             daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month];
     473                 :         }
     474                 :     }
     475                 : 
     476                 :     /* Recompute yday and wday */
     477           23392 :     time->tm_yday = time->tm_mday +
     478           11696 :             lastDayOfMonth[IsLeapYear(time->tm_year)][time->tm_month];
     479                 :             
     480           11696 :     numDays = DAYS_BETWEEN_YEARS(1970, time->tm_year) + time->tm_yday;
     481           11696 :     time->tm_wday = (numDays + 4) % 7;
     482           11696 :     if (time->tm_wday < 0) {
     483               0 :         time->tm_wday += 7;
     484                 :     }
     485                 : 
     486                 :     /* Recompute time parameters */
     487                 : 
     488           11696 :     time->tm_params = params(time);
     489                 : 
     490           23392 :     ApplySecOffset(time, time->tm_params.tp_gmt_offset
     491           11696 :             + time->tm_params.tp_dst_offset);
     492           11696 : }
     493                 : 
     494                 : 
     495                 : /*
     496                 :  *-------------------------------------------------------------------------
     497                 :  *
     498                 :  * PR_LocalTimeParameters --
     499                 :  * 
     500                 :  *     returns the time parameters for the local time zone
     501                 :  *
     502                 :  *     The following uses localtime() from the standard C library.
     503                 :  *     (time.h)  This is our fallback implementation.  Unix, PC, and BeOS
     504                 :  *     use this version.  A platform may have its own machine-dependent
     505                 :  *     implementation of this function.
     506                 :  *
     507                 :  *-------------------------------------------------------------------------
     508                 :  */
     509                 : 
     510                 : #if defined(HAVE_INT_LOCALTIME_R)
     511                 : 
     512                 : /*
     513                 :  * In this case we could define the macro as
     514                 :  *     #define MT_safe_localtime(timer, result) \
     515                 :  *             (localtime_r(timer, result) == 0 ? result : NULL)
     516                 :  * I chose to compare the return value of localtime_r with -1 so 
     517                 :  * that I can catch the cases where localtime_r returns a pointer
     518                 :  * to struct tm.  The macro definition above would not be able to
     519                 :  * detect such mistakes because it is legal to compare a pointer
     520                 :  * with 0.
     521                 :  */
     522                 : 
     523                 : #define MT_safe_localtime(timer, result) \
     524                 :         (localtime_r(timer, result) == -1 ? NULL: result)
     525                 : 
     526                 : #elif defined(HAVE_POINTER_LOCALTIME_R)
     527                 : 
     528                 : #define MT_safe_localtime localtime_r
     529                 : 
     530                 : #else
     531                 : 
     532                 : #define HAVE_LOCALTIME_MONITOR 1  /* We use 'monitor' to serialize our calls
     533                 :                                    * to localtime(). */
     534                 : static PRLock *monitor = NULL;
     535                 : 
     536           13916 : static struct tm *MT_safe_localtime(const time_t *clock, struct tm *result)
     537                 : {
     538                 :     struct tm *tmPtr;
     539           13916 :     int needLock = PR_Initialized();  /* We need to use a lock to protect
     540                 :                                        * against NSPR threads only when the
     541                 :                                        * NSPR thread system is activated. */
     542                 : 
     543           13916 :     if (needLock) PR_Lock(monitor);
     544                 : 
     545                 :     /*
     546                 :      * Microsoft (all flavors) localtime() returns a NULL pointer if 'clock'
     547                 :      * represents a time before midnight January 1, 1970.  In
     548                 :      * that case, we also return a NULL pointer and the struct tm
     549                 :      * object pointed to by 'result' is not modified.
     550                 :      *
     551                 :      * Watcom C/C++ 11.0 localtime() treats time_t as unsigned long
     552                 :      * hence, does not recognize negative values of clock as pre-1/1/70.
     553                 :      * We have to manually check (WIN16 only) for negative value of
     554                 :      * clock and return NULL.
     555                 :      *
     556                 :      * With negative values of clock, OS/2 returns the struct tm for
     557                 :      * clock plus ULONG_MAX. So we also have to check for the invalid
     558                 :      * structs returned for timezones west of Greenwich when clock == 0.
     559                 :      */
     560                 :     
     561           13916 :     tmPtr = localtime(clock);
     562                 : 
     563                 : #if defined(WIN16) || defined(XP_OS2)
     564                 :     if ( (PRInt32) *clock < 0 ||
     565                 :          ( (PRInt32) *clock == 0 && tmPtr->tm_year != 70))
     566                 :         result = NULL;
     567                 :     else
     568                 :         *result = *tmPtr;
     569                 : #else
     570           13916 :     if (tmPtr) {
     571           13916 :         *result = *tmPtr;
     572                 :     } else {
     573               0 :         result = NULL;
     574                 :     }
     575                 : #endif /* WIN16 */
     576                 : 
     577           13916 :     if (needLock) PR_Unlock(monitor);
     578                 : 
     579           13916 :     return result;
     580                 : }
     581                 : 
     582                 : #endif  /* definition of MT_safe_localtime() */
     583                 : 
     584           20034 : void _PR_InitTime(void)
     585                 : {
     586                 : #ifdef HAVE_LOCALTIME_MONITOR
     587           20034 :     monitor = PR_NewLock();
     588                 : #endif
     589                 : #ifdef WINCE
     590                 :     _MD_InitTime();
     591                 : #endif
     592           20034 : }
     593                 : 
     594             140 : void _PR_CleanupTime(void)
     595                 : {
     596                 : #ifdef HAVE_LOCALTIME_MONITOR
     597             140 :     if (monitor) {
     598             140 :         PR_DestroyLock(monitor);
     599             140 :         monitor = NULL;
     600                 :     }
     601                 : #endif
     602                 : #ifdef WINCE
     603                 :     _MD_CleanupTime();
     604                 : #endif
     605             140 : }
     606                 : 
     607                 : #if defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS)
     608                 : 
     609                 : PR_IMPLEMENT(PRTimeParameters)
     610            6958 : PR_LocalTimeParameters(const PRExplodedTime *gmt)
     611                 : {
     612                 : 
     613                 :     PRTimeParameters retVal;
     614                 :     struct tm localTime;
     615                 :     time_t secs;
     616                 :     PRTime secs64;
     617                 :     PRInt64 usecPerSec;
     618                 :     PRInt64 usecPerSec_1;
     619                 :     PRInt64 maxInt32;
     620                 :     PRInt64 minInt32;
     621                 :     PRInt32 dayOffset;
     622                 :     PRInt32 offset2Jan1970;
     623                 :     PRInt32 offsetNew;
     624                 :     int isdst2Jan1970;
     625                 : 
     626                 :     /*
     627                 :      * Calculate the GMT offset.  First, figure out what is
     628                 :      * 00:00:00 Jan. 2, 1970 GMT (which is exactly a day, or 86400
     629                 :      * seconds, since the epoch) in local time.  Then we calculate
     630                 :      * the difference between local time and GMT in seconds:
     631                 :      *     gmt_offset = local_time - GMT
     632                 :      *
     633                 :      * Caveat: the validity of this calculation depends on two
     634                 :      * assumptions:
     635                 :      * 1. Daylight saving time was not in effect on Jan. 2, 1970.
     636                 :      * 2. The time zone of the geographic location has not changed
     637                 :      *    since Jan. 2, 1970.
     638                 :      */
     639                 : 
     640            6958 :     secs = 86400L;
     641            6958 :     (void) MT_safe_localtime(&secs, &localTime);
     642                 : 
     643                 :     /* GMT is 00:00:00, 2nd of Jan. */
     644                 : 
     645           13916 :     offset2Jan1970 = (PRInt32)localTime.tm_sec 
     646            6958 :             + 60L * (PRInt32)localTime.tm_min
     647           13916 :             + 3600L * (PRInt32)localTime.tm_hour
     648            6958 :             + 86400L * (PRInt32)((PRInt32)localTime.tm_mday - 2L);
     649                 : 
     650            6958 :     isdst2Jan1970 = localTime.tm_isdst;
     651                 : 
     652                 :     /*
     653                 :      * Now compute DST offset.  We calculate the overall offset
     654                 :      * of local time from GMT, similar to above.  The overall
     655                 :      * offset has two components: gmt offset and dst offset.
     656                 :      * We subtract gmt offset from the overall offset to get
     657                 :      * the dst offset.
     658                 :      *     overall_offset = local_time - GMT
     659                 :      *     overall_offset = gmt_offset + dst_offset
     660                 :      * ==> dst_offset = local_time - GMT - gmt_offset
     661                 :      */
     662                 : 
     663            6958 :     secs64 = PR_ImplodeTime(gmt);    /* This is still in microseconds */
     664            6958 :     LL_I2L(usecPerSec, PR_USEC_PER_SEC);
     665            6958 :     LL_I2L(usecPerSec_1, PR_USEC_PER_SEC - 1);
     666                 :     /* Convert to seconds, truncating down (3.1 -> 3 and -3.1 -> -4) */
     667            6958 :     if (LL_GE_ZERO(secs64)) {
     668            6958 :         LL_DIV(secs64, secs64, usecPerSec);
     669                 :     } else {
     670               0 :         LL_NEG(secs64, secs64);
     671               0 :         LL_ADD(secs64, secs64, usecPerSec_1);
     672               0 :         LL_DIV(secs64, secs64, usecPerSec);
     673               0 :         LL_NEG(secs64, secs64);
     674                 :     }
     675            6958 :     LL_I2L(maxInt32, PR_INT32_MAX);
     676            6958 :     LL_I2L(minInt32, PR_INT32_MIN);
     677            6958 :     if (LL_CMP(secs64, >, maxInt32) || LL_CMP(secs64, <, minInt32)) {
     678                 :         /* secs64 is too large or too small for time_t (32-bit integer) */
     679               0 :         retVal.tp_gmt_offset = offset2Jan1970;
     680               0 :         retVal.tp_dst_offset = 0;
     681               0 :         return retVal;
     682                 :     }
     683            6958 :     LL_L2I(secs, secs64);
     684                 : 
     685                 :     /*
     686                 :      * On Windows, localtime() (and our MT_safe_localtime() too)
     687                 :      * returns a NULL pointer for time before midnight January 1,
     688                 :      * 1970 GMT.  In that case, we just use the GMT offset for
     689                 :      * Jan 2, 1970 and assume that DST was not in effect.
     690                 :      */
     691                 : 
     692            6958 :     if (MT_safe_localtime(&secs, &localTime) == NULL) {
     693               0 :         retVal.tp_gmt_offset = offset2Jan1970;
     694               0 :         retVal.tp_dst_offset = 0;
     695               0 :         return retVal;
     696                 :     }
     697                 : 
     698                 :     /*
     699                 :      * dayOffset is the offset between local time and GMT in 
     700                 :      * the day component, which can only be -1, 0, or 1.  We
     701                 :      * use the day of the week to compute dayOffset.
     702                 :      */
     703                 : 
     704            6958 :     dayOffset = (PRInt32) localTime.tm_wday - gmt->tm_wday;
     705                 : 
     706                 :     /*
     707                 :      * Need to adjust for wrapping around of day of the week from
     708                 :      * 6 back to 0.
     709                 :      */
     710                 : 
     711            6958 :     if (dayOffset == -6) {
     712                 :         /* Local time is Sunday (0) and GMT is Saturday (6) */
     713               0 :         dayOffset = 1;
     714            6958 :     } else if (dayOffset == 6) {
     715                 :         /* Local time is Saturday (6) and GMT is Sunday (0) */
     716               0 :         dayOffset = -1;
     717                 :     }
     718                 : 
     719           13916 :     offsetNew = (PRInt32)localTime.tm_sec - gmt->tm_sec
     720            6958 :             + 60L * ((PRInt32)localTime.tm_min - gmt->tm_min)
     721           13916 :             + 3600L * ((PRInt32)localTime.tm_hour - gmt->tm_hour)
     722            6958 :             + 86400L * (PRInt32)dayOffset;
     723                 : 
     724            6958 :     if (localTime.tm_isdst <= 0) {
     725                 :         /* DST is not in effect */
     726             321 :         retVal.tp_gmt_offset = offsetNew;
     727             321 :         retVal.tp_dst_offset = 0;
     728                 :     } else {
     729                 :         /* DST is in effect */
     730            6637 :         if (isdst2Jan1970 <=0) {
     731                 :             /*
     732                 :              * DST was not in effect back in 2 Jan. 1970.
     733                 :              * Use the offset back then as the GMT offset,
     734                 :              * assuming the time zone has not changed since then.
     735                 :              */
     736            6637 :             retVal.tp_gmt_offset = offset2Jan1970;
     737            6637 :             retVal.tp_dst_offset = offsetNew - offset2Jan1970;
     738                 :         } else {
     739                 :             /*
     740                 :              * DST was also in effect back in 2 Jan. 1970.
     741                 :              * Then our clever trick (or rather, ugly hack) fails.
     742                 :              * We will just assume DST offset is an hour.
     743                 :              */
     744               0 :             retVal.tp_gmt_offset = offsetNew - 3600;
     745               0 :             retVal.tp_dst_offset = 3600;
     746                 :         }
     747                 :     }
     748                 :     
     749            6958 :     return retVal;
     750                 : }
     751                 : 
     752                 : #endif    /* defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS) */
     753                 : 
     754                 : /*
     755                 :  *------------------------------------------------------------------------
     756                 :  *
     757                 :  * PR_USPacificTimeParameters --
     758                 :  *
     759                 :  *     The time parameters function for the US Pacific Time Zone.
     760                 :  *
     761                 :  *------------------------------------------------------------------------
     762                 :  */
     763                 : 
     764                 : /*
     765                 :  * Returns the mday of the first sunday of the month, where
     766                 :  * mday and wday are for a given day in the month.
     767                 :  * mdays start with 1 (e.g. 1..31).  
     768                 :  * wdays start with 0 and are in the range 0..6.  0 = Sunday.
     769                 :  */
     770                 : #define firstSunday(mday, wday) (((mday - wday + 7 - 1) % 7) + 1)
     771                 : 
     772                 : /*
     773                 :  * Returns the mday for the N'th Sunday of the month, where 
     774                 :  * mday and wday are for a given day in the month.
     775                 :  * mdays start with 1 (e.g. 1..31).  
     776                 :  * wdays start with 0 and are in the range 0..6.  0 = Sunday.
     777                 :  * N has the following values: 0 = first, 1 = second (etc), -1 = last.
     778                 :  * ndays is the number of days in that month, the same value as the 
     779                 :  * mday of the last day of the month.
     780                 :  */
     781                 : static PRInt32 
     782               0 : NthSunday(PRInt32 mday, PRInt32 wday, PRInt32 N, PRInt32 ndays) 
     783                 : {
     784               0 :     PRInt32 firstSun = firstSunday(mday, wday);
     785                 : 
     786               0 :     if (N < 0) 
     787               0 :         N = (ndays - firstSun) / 7;
     788               0 :     return firstSun + (7 * N);
     789                 : }
     790                 : 
     791                 : typedef struct DSTParams {
     792                 :     PRInt8 dst_start_month;       /* 0 = January */
     793                 :     PRInt8 dst_start_Nth_Sunday;  /* N as defined above */
     794                 :     PRInt8 dst_start_month_ndays; /* ndays as defined above */
     795                 :     PRInt8 dst_end_month;         /* 0 = January */
     796                 :     PRInt8 dst_end_Nth_Sunday;    /* N as defined above */
     797                 :     PRInt8 dst_end_month_ndays;   /* ndays as defined above */
     798                 : } DSTParams;
     799                 : 
     800                 : static const DSTParams dstParams[2] = {
     801                 :     /* year < 2007:  First April Sunday - Last October Sunday */
     802                 :     { 3, 0, 30, 9, -1, 31 },
     803                 :     /* year >= 2007: Second March Sunday - First November Sunday */
     804                 :     { 2, 1, 31, 10, 0, 30 }
     805                 : };
     806                 : 
     807                 : PR_IMPLEMENT(PRTimeParameters)
     808               0 : PR_USPacificTimeParameters(const PRExplodedTime *gmt)
     809                 : {
     810                 :     const DSTParams *dst;
     811                 :     PRTimeParameters retVal;
     812                 :     PRExplodedTime st;
     813                 : 
     814                 :     /*
     815                 :      * Based on geographic location and GMT, figure out offset of
     816                 :      * standard time from GMT.  In this example implementation, we
     817                 :      * assume the local time zone is US Pacific Time.
     818                 :      */
     819                 : 
     820               0 :     retVal.tp_gmt_offset = -8L * 3600L;
     821                 : 
     822                 :     /*
     823                 :      * Make a copy of GMT.  Note that the tm_params field of this copy
     824                 :      * is ignored.
     825                 :      */
     826                 : 
     827               0 :     st.tm_usec = gmt->tm_usec;
     828               0 :     st.tm_sec = gmt->tm_sec;
     829               0 :     st.tm_min = gmt->tm_min;
     830               0 :     st.tm_hour = gmt->tm_hour;
     831               0 :     st.tm_mday = gmt->tm_mday;
     832               0 :     st.tm_month = gmt->tm_month;
     833               0 :     st.tm_year = gmt->tm_year;
     834               0 :     st.tm_wday = gmt->tm_wday;
     835               0 :     st.tm_yday = gmt->tm_yday;
     836                 : 
     837                 :     /* Apply the offset to GMT to obtain the local standard time */
     838               0 :     ApplySecOffset(&st, retVal.tp_gmt_offset);
     839                 : 
     840               0 :     if (st.tm_year < 2007) { /* first April Sunday - Last October Sunday */
     841               0 :         dst = &dstParams[0];
     842                 :     } else {                 /* Second March Sunday - First November Sunday */
     843               0 :         dst = &dstParams[1];
     844                 :     }
     845                 : 
     846                 :     /*
     847                 :      * Apply the rules on standard time or GMT to obtain daylight saving
     848                 :      * time offset.  In this implementation, we use the US DST rule.
     849                 :      */
     850               0 :     if (st.tm_month < dst->dst_start_month) {
     851               0 :         retVal.tp_dst_offset = 0L;
     852               0 :     } else if (st.tm_month == dst->dst_start_month) {
     853               0 :         int NthSun = NthSunday(st.tm_mday, st.tm_wday, 
     854               0 :                                dst->dst_start_Nth_Sunday, 
     855               0 :                                dst->dst_start_month_ndays);
     856               0 :         if (st.tm_mday < NthSun) {              /* Before starting Sunday */
     857               0 :             retVal.tp_dst_offset = 0L;
     858               0 :         } else if (st.tm_mday == NthSun) {      /* Starting Sunday */
     859                 :             /* 01:59:59 PST -> 03:00:00 PDT */
     860               0 :             if (st.tm_hour < 2) {
     861               0 :                 retVal.tp_dst_offset = 0L;
     862                 :             } else {
     863               0 :                 retVal.tp_dst_offset = 3600L;
     864                 :             }
     865                 :         } else {                                /* After starting Sunday */
     866               0 :             retVal.tp_dst_offset = 3600L;
     867                 :         }
     868               0 :     } else if (st.tm_month < dst->dst_end_month) {
     869               0 :         retVal.tp_dst_offset = 3600L;
     870               0 :     } else if (st.tm_month == dst->dst_end_month) {
     871               0 :         int NthSun = NthSunday(st.tm_mday, st.tm_wday, 
     872               0 :                                dst->dst_end_Nth_Sunday, 
     873               0 :                                dst->dst_end_month_ndays);
     874               0 :         if (st.tm_mday < NthSun) {              /* Before ending Sunday */
     875               0 :             retVal.tp_dst_offset = 3600L;
     876               0 :         } else if (st.tm_mday == NthSun) {      /* Ending Sunday */
     877                 :             /* 01:59:59 PDT -> 01:00:00 PST */
     878               0 :             if (st.tm_hour < 1) {
     879               0 :                 retVal.tp_dst_offset = 3600L;
     880                 :             } else {
     881               0 :                 retVal.tp_dst_offset = 0L;
     882                 :             }
     883                 :         } else {                                /* After ending Sunday */
     884               0 :             retVal.tp_dst_offset = 0L;
     885                 :         }
     886                 :     } else {
     887               0 :         retVal.tp_dst_offset = 0L;
     888                 :     }
     889               0 :     return retVal;
     890                 : }
     891                 : 
     892                 : /*
     893                 :  *------------------------------------------------------------------------
     894                 :  *
     895                 :  * PR_GMTParameters --
     896                 :  *
     897                 :  *     Returns the PRTimeParameters for Greenwich Mean Time.
     898                 :  *     Trivially, both the tp_gmt_offset and tp_dst_offset fields are 0.
     899                 :  *
     900                 :  *------------------------------------------------------------------------
     901                 :  */
     902                 : 
     903                 : PR_IMPLEMENT(PRTimeParameters)
     904           11896 : PR_GMTParameters(const PRExplodedTime *gmt)
     905                 : {
     906           11896 :     PRTimeParameters retVal = { 0, 0 };
     907           11896 :     return retVal;
     908                 : }
     909                 : 
     910                 : /*
     911                 :  * The following code implements PR_ParseTimeString().  It is based on
     912                 :  * ns/lib/xp/xp_time.c, revision 1.25, by Jamie Zawinski <jwz@netscape.com>.
     913                 :  */
     914                 : 
     915                 : /*
     916                 :  * We only recognize the abbreviations of a small subset of time zones
     917                 :  * in North America, Europe, and Japan.
     918                 :  *
     919                 :  * PST/PDT: Pacific Standard/Daylight Time
     920                 :  * MST/MDT: Mountain Standard/Daylight Time
     921                 :  * CST/CDT: Central Standard/Daylight Time
     922                 :  * EST/EDT: Eastern Standard/Daylight Time
     923                 :  * AST: Atlantic Standard Time
     924                 :  * NST: Newfoundland Standard Time
     925                 :  * GMT: Greenwich Mean Time
     926                 :  * BST: British Summer Time
     927                 :  * MET: Middle Europe Time
     928                 :  * EET: Eastern Europe Time
     929                 :  * JST: Japan Standard Time
     930                 :  */
     931                 : 
     932                 : typedef enum
     933                 : {
     934                 :   TT_UNKNOWN,
     935                 : 
     936                 :   TT_SUN, TT_MON, TT_TUE, TT_WED, TT_THU, TT_FRI, TT_SAT,
     937                 : 
     938                 :   TT_JAN, TT_FEB, TT_MAR, TT_APR, TT_MAY, TT_JUN,
     939                 :   TT_JUL, TT_AUG, TT_SEP, TT_OCT, TT_NOV, TT_DEC,
     940                 : 
     941                 :   TT_PST, TT_PDT, TT_MST, TT_MDT, TT_CST, TT_CDT, TT_EST, TT_EDT,
     942                 :   TT_AST, TT_NST, TT_GMT, TT_BST, TT_MET, TT_EET, TT_JST
     943                 : } TIME_TOKEN;
     944                 : 
     945                 : /*
     946                 :  * This parses a time/date string into a PRTime
     947                 :  * (microseconds after "1-Jan-1970 00:00:00 GMT").
     948                 :  * It returns PR_SUCCESS on success, and PR_FAILURE
     949                 :  * if the time/date string can't be parsed.
     950                 :  *
     951                 :  * Many formats are handled, including:
     952                 :  *
     953                 :  *   14 Apr 89 03:20:12
     954                 :  *   14 Apr 89 03:20 GMT
     955                 :  *   Fri, 17 Mar 89 4:01:33
     956                 :  *   Fri, 17 Mar 89 4:01 GMT
     957                 :  *   Mon Jan 16 16:12 PDT 1989
     958                 :  *   Mon Jan 16 16:12 +0130 1989
     959                 :  *   6 May 1992 16:41-JST (Wednesday)
     960                 :  *   22-AUG-1993 10:59:12.82
     961                 :  *   22-AUG-1993 10:59pm
     962                 :  *   22-AUG-1993 12:59am
     963                 :  *   22-AUG-1993 12:59 PM
     964                 :  *   Friday, August 04, 1995 3:54 PM
     965                 :  *   06/21/95 04:24:34 PM
     966                 :  *   20/06/95 21:07
     967                 :  *   95-06-08 19:32:48 EDT
     968                 :  *
     969                 :  * If the input string doesn't contain a description of the timezone,
     970                 :  * we consult the `default_to_gmt' to decide whether the string should
     971                 :  * be interpreted relative to the local time zone (PR_FALSE) or GMT (PR_TRUE).
     972                 :  * The correct value for this argument depends on what standard specified
     973                 :  * the time string which you are parsing.
     974                 :  */
     975                 : 
     976                 : PR_IMPLEMENT(PRStatus)
     977           17477 : PR_ParseTimeStringToExplodedTime(
     978                 :         const char *string,
     979                 :         PRBool default_to_gmt,
     980                 :         PRExplodedTime *result)
     981                 : {
     982           17477 :   TIME_TOKEN dotw = TT_UNKNOWN;
     983           17477 :   TIME_TOKEN month = TT_UNKNOWN;
     984           17477 :   TIME_TOKEN zone = TT_UNKNOWN;
     985           17477 :   int zone_offset = -1;
     986           17477 :   int dst_offset = 0;
     987           17477 :   int date = -1;
     988           17477 :   PRInt32 year = -1;
     989           17477 :   int hour = -1;
     990           17477 :   int min = -1;
     991           17477 :   int sec = -1;
     992                 : 
     993           17477 :   const char *rest = string;
     994                 : 
     995           17477 :   int iterations = 0;
     996                 : 
     997           17477 :   PR_ASSERT(string && result);
     998           17477 :   if (!string || !result) return PR_FAILURE;
     999                 : 
    1000           48503 :   while (*rest)
    1001                 :         {
    1002                 : 
    1003           13549 :           if (iterations++ > 1000)
    1004                 :                 {
    1005               0 :                   return PR_FAILURE;
    1006                 :                 }
    1007                 : 
    1008           13549 :           switch (*rest)
    1009                 :                 {
    1010                 :                 case 'a': case 'A':
    1011               8 :                   if (month == TT_UNKNOWN &&
    1012               8 :                           (rest[1] == 'p' || rest[1] == 'P') &&
    1013               4 :                           (rest[2] == 'r' || rest[2] == 'R'))
    1014               4 :                         month = TT_APR;
    1015               0 :                   else if (zone == TT_UNKNOWN &&
    1016               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1017               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1018               0 :                         zone = TT_AST;
    1019               0 :                   else if (month == TT_UNKNOWN &&
    1020               0 :                                    (rest[1] == 'u' || rest[1] == 'U') &&
    1021               0 :                                    (rest[2] == 'g' || rest[2] == 'G'))
    1022               0 :                         month = TT_AUG;
    1023               4 :                   break;
    1024                 :                 case 'b': case 'B':
    1025               2 :                   if (zone == TT_UNKNOWN &&
    1026               2 :                           (rest[1] == 's' || rest[1] == 'S') &&
    1027               0 :                           (rest[2] == 't' || rest[2] == 'T'))
    1028               0 :                         zone = TT_BST;
    1029               1 :                   break;
    1030                 :                 case 'c': case 'C':
    1031               0 :                   if (zone == TT_UNKNOWN &&
    1032               0 :                           (rest[1] == 'd' || rest[1] == 'D') &&
    1033               0 :                           (rest[2] == 't' || rest[2] == 'T'))
    1034               0 :                         zone = TT_CDT;
    1035               0 :                   else if (zone == TT_UNKNOWN &&
    1036               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1037               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1038               0 :                         zone = TT_CST;
    1039               0 :                   break;
    1040                 :                 case 'd': case 'D':
    1041               2 :                   if (month == TT_UNKNOWN &&
    1042               2 :                           (rest[1] == 'e' || rest[1] == 'E') &&
    1043               1 :                           (rest[2] == 'c' || rest[2] == 'C'))
    1044               1 :                         month = TT_DEC;
    1045               1 :                   break;
    1046                 :                 case 'e': case 'E':
    1047               0 :                   if (zone == TT_UNKNOWN &&
    1048               0 :                           (rest[1] == 'd' || rest[1] == 'D') &&
    1049               0 :                           (rest[2] == 't' || rest[2] == 'T'))
    1050               0 :                         zone = TT_EDT;
    1051               0 :                   else if (zone == TT_UNKNOWN &&
    1052               0 :                                    (rest[1] == 'e' || rest[1] == 'E') &&
    1053               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1054               0 :                         zone = TT_EET;
    1055               0 :                   else if (zone == TT_UNKNOWN &&
    1056               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1057               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1058               0 :                         zone = TT_EST;
    1059               0 :                   break;
    1060                 :                 case 'f': case 'F':
    1061               0 :                   if (month == TT_UNKNOWN &&
    1062               0 :                           (rest[1] == 'e' || rest[1] == 'E') &&
    1063               0 :                           (rest[2] == 'b' || rest[2] == 'B'))
    1064               0 :                         month = TT_FEB;
    1065               0 :                   else if (dotw == TT_UNKNOWN &&
    1066               0 :                                    (rest[1] == 'r' || rest[1] == 'R') &&
    1067               0 :                                    (rest[2] == 'i' || rest[2] == 'I'))
    1068               0 :                         dotw = TT_FRI;
    1069               0 :                   break;
    1070                 :                 case 'g': case 'G':
    1071            4324 :                   if (zone == TT_UNKNOWN &&
    1072            6486 :                           (rest[1] == 'm' || rest[1] == 'M') &&
    1073            4324 :                           (rest[2] == 't' || rest[2] == 'T'))
    1074            2162 :                         zone = TT_GMT;
    1075            2162 :                   break;
    1076                 :                 case 'j': case 'J':
    1077            4506 :                   if (month == TT_UNKNOWN &&
    1078            4506 :                           (rest[1] == 'a' || rest[1] == 'A') &&
    1079               2 :                           (rest[2] == 'n' || rest[2] == 'N'))
    1080               2 :                         month = TT_JAN;
    1081            4502 :                   else if (zone == TT_UNKNOWN &&
    1082            4502 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1083               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1084               0 :                         zone = TT_JST;
    1085            4502 :                   else if (month == TT_UNKNOWN &&
    1086            4502 :                                    (rest[1] == 'u' || rest[1] == 'U') &&
    1087            4502 :                                    (rest[2] == 'l' || rest[2] == 'L'))
    1088               0 :                         month = TT_JUL;
    1089            4502 :                   else if (month == TT_UNKNOWN &&
    1090            4502 :                                    (rest[1] == 'u' || rest[1] == 'U') &&
    1091            2251 :                                    (rest[2] == 'n' || rest[2] == 'N'))
    1092            2251 :                         month = TT_JUN;
    1093            2253 :                   break;
    1094                 :                 case 'm': case 'M':
    1095               0 :                   if (month == TT_UNKNOWN &&
    1096               0 :                           (rest[1] == 'a' || rest[1] == 'A') &&
    1097               0 :                           (rest[2] == 'r' || rest[2] == 'R'))
    1098               0 :                         month = TT_MAR;
    1099               0 :                   else if (month == TT_UNKNOWN &&
    1100               0 :                                    (rest[1] == 'a' || rest[1] == 'A') &&
    1101               0 :                                    (rest[2] == 'y' || rest[2] == 'Y'))
    1102               0 :                         month = TT_MAY;
    1103               0 :                   else if (zone == TT_UNKNOWN &&
    1104               0 :                                    (rest[1] == 'd' || rest[1] == 'D') &&
    1105               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1106               0 :                         zone = TT_MDT;
    1107               0 :                   else if (zone == TT_UNKNOWN &&
    1108               0 :                                    (rest[1] == 'e' || rest[1] == 'E') &&
    1109               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1110               0 :                         zone = TT_MET;
    1111               0 :                   else if (dotw == TT_UNKNOWN &&
    1112               0 :                                    (rest[1] == 'o' || rest[1] == 'O') &&
    1113               0 :                                    (rest[2] == 'n' || rest[2] == 'N'))
    1114               0 :                         dotw = TT_MON;
    1115               0 :                   else if (zone == TT_UNKNOWN &&
    1116               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1117               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1118               0 :                         zone = TT_MST;
    1119               0 :                   break;
    1120                 :                 case 'n': case 'N':
    1121               0 :                   if (month == TT_UNKNOWN &&
    1122               0 :                           (rest[1] == 'o' || rest[1] == 'O') &&
    1123               0 :                           (rest[2] == 'v' || rest[2] == 'V'))
    1124               0 :                         month = TT_NOV;
    1125               0 :                   else if (zone == TT_UNKNOWN &&
    1126               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1127               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1128               0 :                         zone = TT_NST;
    1129               0 :                   break;
    1130                 :                 case 'o': case 'O':
    1131               0 :                   if (month == TT_UNKNOWN &&
    1132               0 :                           (rest[1] == 'c' || rest[1] == 'C') &&
    1133               0 :                           (rest[2] == 't' || rest[2] == 'T'))
    1134               0 :                         month = TT_OCT;
    1135               0 :                   break;
    1136                 :                 case 'p': case 'P':
    1137               0 :                   if (zone == TT_UNKNOWN &&
    1138               0 :                           (rest[1] == 'd' || rest[1] == 'D') &&
    1139               0 :                           (rest[2] == 't' || rest[2] == 'T'))
    1140               0 :                         zone = TT_PDT;
    1141               0 :                   else if (zone == TT_UNKNOWN &&
    1142               0 :                                    (rest[1] == 's' || rest[1] == 'S') &&
    1143               0 :                                    (rest[2] == 't' || rest[2] == 'T'))
    1144               0 :                         zone = TT_PST;
    1145               0 :                   break;
    1146                 :                 case 's': case 'S':
    1147            4504 :                   if (dotw == TT_UNKNOWN &&
    1148            4504 :                           (rest[1] == 'a' || rest[1] == 'A') &&
    1149            2251 :                           (rest[2] == 't' || rest[2] == 'T'))
    1150            2251 :                         dotw = TT_SAT;
    1151               2 :                   else if (month == TT_UNKNOWN &&
    1152               2 :                                    (rest[1] == 'e' || rest[1] == 'E') &&
    1153               0 :                                    (rest[2] == 'p' || rest[2] == 'P'))
    1154               0 :                         month = TT_SEP;
    1155               2 :                   else if (dotw == TT_UNKNOWN &&
    1156               2 :                                    (rest[1] == 'u' || rest[1] == 'U') &&
    1157               1 :                                    (rest[2] == 'n' || rest[2] == 'N'))
    1158               1 :                         dotw = TT_SUN;
    1159            2252 :                   break;
    1160                 :                 case 't': case 'T':
    1161               8 :                   if (dotw == TT_UNKNOWN &&
    1162               8 :                           (rest[1] == 'h' || rest[1] == 'H') &&
    1163               4 :                           (rest[2] == 'u' || rest[2] == 'U'))
    1164               4 :                         dotw = TT_THU;
    1165               0 :                   else if (dotw == TT_UNKNOWN &&
    1166               0 :                                    (rest[1] == 'u' || rest[1] == 'U') &&
    1167               0 :                                    (rest[2] == 'e' || rest[2] == 'E'))
    1168               0 :                         dotw = TT_TUE;
    1169               4 :                   break;
    1170                 :                 case 'u': case 'U':
    1171             192 :                   if (zone == TT_UNKNOWN &&
    1172             288 :                           (rest[1] == 't' || rest[1] == 'T') &&
    1173             192 :                           !(rest[2] >= 'A' && rest[2] <= 'Z') &&
    1174               0 :                           !(rest[2] >= 'a' && rest[2] <= 'z'))
    1175                 :                         /* UT is the same as GMT but UTx is not. */
    1176               0 :                         zone = TT_GMT;
    1177              96 :                   break;
    1178                 :                 case 'w': case 'W':
    1179               0 :                   if (dotw == TT_UNKNOWN &&
    1180               0 :                           (rest[1] == 'e' || rest[1] == 'E') &&
    1181               0 :                           (rest[2] == 'd' || rest[2] == 'D'))
    1182               0 :                         dotw = TT_WED;
    1183               0 :                   break;
    1184                 : 
    1185                 :                 case '+': case '-':
    1186                 :                   {
    1187                 :                         const char *end;
    1188                 :                         int sign;
    1189               0 :                         if (zone_offset != -1)
    1190                 :                           {
    1191                 :                                 /* already got one... */
    1192               0 :                                 rest++;
    1193               0 :                                 break;
    1194                 :                           }
    1195               0 :                         if (zone != TT_UNKNOWN && zone != TT_GMT)
    1196                 :                           {
    1197                 :                                 /* GMT+0300 is legal, but PST+0300 is not. */
    1198               0 :                                 rest++;
    1199               0 :                                 break;
    1200                 :                           }
    1201                 : 
    1202               0 :                         sign = ((*rest == '+') ? 1 : -1);
    1203               0 :                         rest++; /* move over sign */
    1204               0 :                         end = rest;
    1205               0 :                         while (*end >= '0' && *end <= '9')
    1206               0 :                           end++;
    1207               0 :                         if (rest == end) /* no digits here */
    1208               0 :                           break;
    1209                 : 
    1210               0 :                         if ((end - rest) == 4)
    1211                 :                           /* offset in HHMM */
    1212               0 :                           zone_offset = (((((rest[0]-'0')*10) + (rest[1]-'0')) * 60) +
    1213               0 :                                                          (((rest[2]-'0')*10) + (rest[3]-'0')));
    1214               0 :                         else if ((end - rest) == 2)
    1215                 :                           /* offset in hours */
    1216               0 :                           zone_offset = (((rest[0]-'0')*10) + (rest[1]-'0')) * 60;
    1217               0 :                         else if ((end - rest) == 1)
    1218                 :                           /* offset in hours */
    1219               0 :                           zone_offset = (rest[0]-'0') * 60;
    1220                 :                         else
    1221                 :                           /* 3 or >4 */
    1222               0 :                           break;
    1223                 : 
    1224               0 :                         zone_offset *= sign;
    1225               0 :                         zone = TT_GMT;
    1226               0 :                         break;
    1227                 :                   }
    1228                 : 
    1229                 :                 case '0': case '1': case '2': case '3': case '4':
    1230                 :                 case '5': case '6': case '7': case '8': case '9':
    1231                 :                   {
    1232            6774 :                         int tmp_hour = -1;
    1233            6774 :                         int tmp_min = -1;
    1234            6774 :                         int tmp_sec = -1;
    1235            6774 :                         const char *end = rest + 1;
    1236           24740 :                         while (*end >= '0' && *end <= '9')
    1237           11192 :                           end++;
    1238                 : 
    1239                 :                         /* end is now the first character after a range of digits. */
    1240                 : 
    1241            6774 :                         if (*end == ':')
    1242                 :                           {
    1243            2258 :                                 if (hour >= 0 && min >= 0) /* already got it */
    1244               0 :                                   break;
    1245                 : 
    1246                 :                                 /* We have seen "[0-9]+:", so this is probably HH:MM[:SS] */
    1247            2258 :                                 if ((end - rest) > 2)
    1248                 :                                   /* it is [0-9][0-9][0-9]+: */
    1249               0 :                                   break;
    1250            2258 :                                 else if ((end - rest) == 2)
    1251            4516 :                                   tmp_hour = ((rest[0]-'0')*10 +
    1252            2258 :                                                           (rest[1]-'0'));
    1253                 :                                 else
    1254               0 :                                   tmp_hour = (rest[0]-'0');
    1255                 : 
    1256                 :                                 /* move over the colon, and parse minutes */
    1257                 : 
    1258            2258 :                                 rest = ++end;
    1259            9032 :                                 while (*end >= '0' && *end <= '9')
    1260            4516 :                                   end++;
    1261                 : 
    1262            2258 :                                 if (end == rest)
    1263                 :                                   /* no digits after first colon? */
    1264               0 :                                   break;
    1265            2258 :                                 else if ((end - rest) > 2)
    1266                 :                                   /* it is [0-9][0-9][0-9]+: */
    1267               0 :                                   break;
    1268            2258 :                                 else if ((end - rest) == 2)
    1269            4516 :                                   tmp_min = ((rest[0]-'0')*10 +
    1270            2258 :                                                          (rest[1]-'0'));
    1271                 :                                 else
    1272               0 :                                   tmp_min = (rest[0]-'0');
    1273                 : 
    1274                 :                                 /* now go for seconds */
    1275            2258 :                                 rest = end;
    1276            2258 :                                 if (*rest == ':')
    1277            2258 :                                   rest++;
    1278            2258 :                                 end = rest;
    1279            9000 :                                 while (*end >= '0' && *end <= '9')
    1280            4484 :                                   end++;
    1281                 : 
    1282            2258 :                                 if (end == rest)
    1283                 :                                   /* no digits after second colon - that's ok. */
    1284                 :                                   ;
    1285            2258 :                                 else if ((end - rest) > 2)
    1286                 :                                   /* it is [0-9][0-9][0-9]+: */
    1287               0 :                                   break;
    1288            2258 :                                 else if ((end - rest) == 2)
    1289            4452 :                                   tmp_sec = ((rest[0]-'0')*10 +
    1290            2226 :                                                          (rest[1]-'0'));
    1291                 :                                 else
    1292              32 :                                   tmp_sec = (rest[0]-'0');
    1293                 : 
    1294                 :                                 /* If we made it here, we've parsed hour and min,
    1295                 :                                    and possibly sec, so it worked as a unit. */
    1296                 : 
    1297                 :                                 /* skip over whitespace and see if there's an AM or PM
    1298                 :                                    directly following the time.
    1299                 :                                  */
    1300            2258 :                                 if (tmp_hour <= 12)
    1301                 :                                   {
    1302            2253 :                                         const char *s = end;
    1303            6759 :                                         while (*s && (*s == ' ' || *s == '\t'))
    1304            2253 :                                           s++;
    1305            2253 :                                         if ((s[0] == 'p' || s[0] == 'P') &&
    1306               0 :                                                 (s[1] == 'm' || s[1] == 'M'))
    1307                 :                                           /* 10:05pm == 22:05, and 12:05pm == 12:05 */
    1308               0 :                                           tmp_hour = (tmp_hour == 12 ? 12 : tmp_hour + 12);
    1309            3678 :                                         else if (tmp_hour == 12 &&
    1310            2850 :                                                          (s[0] == 'a' || s[0] == 'A') &&
    1311               0 :                                                          (s[1] == 'm' || s[1] == 'M'))
    1312                 :                                           /* 12:05am == 00:05 */
    1313               0 :                                           tmp_hour = 0;
    1314                 :                                   }
    1315                 : 
    1316            2258 :                                 hour = tmp_hour;
    1317            2258 :                                 min = tmp_min;
    1318            2258 :                                 sec = tmp_sec;
    1319            2258 :                                 rest = end;
    1320            2258 :                                 break;
    1321                 :                           }
    1322            4517 :                         else if ((*end == '/' || *end == '-') &&
    1323               2 :                                          end[1] >= '0' && end[1] <= '9')
    1324               0 :                           {
    1325                 :                                 /* Perhaps this is 6/16/95, 16/6/95, 6-16-95, or 16-6-95
    1326                 :                                    or even 95-06-05...
    1327                 :                                    #### But it doesn't handle 1995-06-22.
    1328                 :                                  */
    1329                 :                                 int n1, n2, n3;
    1330                 :                                 const char *s;
    1331                 : 
    1332               0 :                                 if (month != TT_UNKNOWN)
    1333                 :                                   /* if we saw a month name, this can't be. */
    1334               0 :                                   break;
    1335                 : 
    1336               0 :                                 s = rest;
    1337                 : 
    1338               0 :                                 n1 = (*s++ - '0');                                /* first 1 or 2 digits */
    1339               0 :                                 if (*s >= '0' && *s <= '9')
    1340               0 :                                   n1 = n1*10 + (*s++ - '0');
    1341                 : 
    1342               0 :                                 if (*s != '/' && *s != '-')                /* slash */
    1343               0 :                                   break;
    1344               0 :                                 s++;
    1345                 : 
    1346               0 :                                 if (*s < '0' || *s > '9')                /* second 1 or 2 digits */
    1347                 :                                   break;
    1348               0 :                                 n2 = (*s++ - '0');
    1349               0 :                                 if (*s >= '0' && *s <= '9')
    1350               0 :                                   n2 = n2*10 + (*s++ - '0');
    1351                 : 
    1352               0 :                                 if (*s != '/' && *s != '-')                /* slash */
    1353               0 :                                   break;
    1354               0 :                                 s++;
    1355                 : 
    1356               0 :                                 if (*s < '0' || *s > '9')                /* third 1, 2, 4, or 5 digits */
    1357                 :                                   break;
    1358               0 :                                 n3 = (*s++ - '0');
    1359               0 :                                 if (*s >= '0' && *s <= '9')
    1360               0 :                                   n3 = n3*10 + (*s++ - '0');
    1361                 : 
    1362               0 :                                 if (*s >= '0' && *s <= '9')            /* optional digits 3, 4, and 5 */
    1363                 :                                   {
    1364               0 :                                         n3 = n3*10 + (*s++ - '0');
    1365               0 :                                         if (*s < '0' || *s > '9')
    1366                 :                                           break;
    1367               0 :                                         n3 = n3*10 + (*s++ - '0');
    1368               0 :                                         if (*s >= '0' && *s <= '9')
    1369               0 :                                           n3 = n3*10 + (*s++ - '0');
    1370                 :                                   }
    1371                 : 
    1372               0 :                                 if ((*s >= '0' && *s <= '9') ||        /* followed by non-alphanum */
    1373               0 :                                         (*s >= 'A' && *s <= 'Z') ||
    1374               0 :                                         (*s >= 'a' && *s <= 'z'))
    1375                 :                                   break;
    1376                 : 
    1377                 :                                 /* Ok, we parsed three 1-2 digit numbers, with / or -
    1378                 :                                    between them.  Now decide what the hell they are
    1379                 :                                    (DD/MM/YY or MM/DD/YY or YY/MM/DD.)
    1380                 :                                  */
    1381                 : 
    1382               0 :                                 if (n1 > 31 || n1 == 0)  /* must be YY/MM/DD */
    1383                 :                                   {
    1384               0 :                                         if (n2 > 12) break;
    1385               0 :                                         if (n3 > 31) break;
    1386               0 :                                         year = n1;
    1387               0 :                                         if (year < 70)
    1388               0 :                                             year += 2000;
    1389               0 :                                         else if (year < 100)
    1390               0 :                                             year += 1900;
    1391               0 :                                         month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
    1392               0 :                                         date = n3;
    1393               0 :                                         rest = s;
    1394               0 :                                         break;
    1395                 :                                   }
    1396                 : 
    1397               0 :                                 if (n1 > 12 && n2 > 12)  /* illegal */
    1398                 :                                   {
    1399               0 :                                         rest = s;
    1400               0 :                                         break;
    1401                 :                                   }
    1402                 : 
    1403               0 :                                 if (n3 < 70)
    1404               0 :                                     n3 += 2000;
    1405               0 :                                 else if (n3 < 100)
    1406               0 :                                     n3 += 1900;
    1407                 : 
    1408               0 :                                 if (n1 > 12)  /* must be DD/MM/YY */
    1409                 :                                   {
    1410               0 :                                         date = n1;
    1411               0 :                                         month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1);
    1412               0 :                                         year = n3;
    1413                 :                                   }
    1414                 :                                 else                  /* assume MM/DD/YY */
    1415                 :                                   {
    1416                 :                                         /* #### In the ambiguous case, should we consult the
    1417                 :                                            locale to find out the local default? */
    1418               0 :                                         month = (TIME_TOKEN)(n1 + ((int)TT_JAN) - 1);
    1419               0 :                                         date = n2;
    1420               0 :                                         year = n3;
    1421                 :                                   }
    1422               0 :                                 rest = s;
    1423                 :                           }
    1424            9032 :                         else if ((*end >= 'A' && *end <= 'Z') ||
    1425            4516 :                                          (*end >= 'a' && *end <= 'z'))
    1426                 :                           /* Digits followed by non-punctuation - what's that? */
    1427                 :                           ;
    1428            4516 :                         else if ((end - rest) == 5)                /* five digits is a year */
    1429               0 :                           year = (year < 0
    1430               0 :                                           ? ((rest[0]-'0')*10000L +
    1431               0 :                                                  (rest[1]-'0')*1000L +
    1432               0 :                                                  (rest[2]-'0')*100L +
    1433               0 :                                                  (rest[3]-'0')*10L +
    1434               0 :                                                  (rest[4]-'0'))
    1435                 :                                           : year);
    1436            4516 :                         else if ((end - rest) == 4)                /* four digits is a year */
    1437            6774 :                           year = (year < 0
    1438            4516 :                                           ? ((rest[0]-'0')*1000L +
    1439            4516 :                                                  (rest[1]-'0')*100L +
    1440            2258 :                                                  (rest[2]-'0')*10L +
    1441            4516 :                                                  (rest[3]-'0'))
    1442                 :                                           : year);
    1443            2258 :                         else if ((end - rest) == 2)                /* two digits - date or year */
    1444                 :                           {
    1445            4320 :                                 int n = ((rest[0]-'0')*10 +
    1446            2160 :                                                  (rest[1]-'0'));
    1447                 :                                 /* If we don't have a date (day of the month) and we see a number
    1448                 :                                      less than 32, then assume that is the date.
    1449                 : 
    1450                 :                                          Otherwise, if we have a date and not a year, assume this is the
    1451                 :                                          year.  If it is less than 70, then assume it refers to the 21st
    1452                 :                                          century.  If it is two digits (>= 70), assume it refers to this
    1453                 :                                          century.  Otherwise, assume it refers to an unambiguous year.
    1454                 : 
    1455                 :                                          The world will surely end soon.
    1456                 :                                    */
    1457            2160 :                                 if (date < 0 && n < 32)
    1458            2160 :                                   date = n;
    1459               0 :                                 else if (year < 0)
    1460                 :                                   {
    1461               0 :                                         if (n < 70)
    1462               0 :                                           year = 2000 + n;
    1463               0 :                                         else if (n < 100)
    1464               0 :                                           year = 1900 + n;
    1465                 :                                         else
    1466               0 :                                           year = n;
    1467                 :                                   }
    1468                 :                                 /* else what the hell is this. */
    1469                 :                           }
    1470              98 :                         else if ((end - rest) == 1)                /* one digit - date */
    1471              98 :                           date = (date < 0 ? (rest[0]-'0') : date);
    1472                 :                         /* else, three or more than five digits - what's that? */
    1473                 : 
    1474            4516 :                         break;
    1475                 :                   }
    1476                 :                 }
    1477                 : 
    1478                 :           /* Skip to the end of this token, whether we parsed it or not.
    1479                 :                  Tokens are delimited by whitespace, or ,;-/
    1480                 :                  But explicitly not :+-.
    1481                 :            */
    1482          105944 :           while (*rest &&
    1483          117144 :                          *rest != ' ' && *rest != '\t' &&
    1484          103598 :                          *rest != ',' && *rest != ';' &&
    1485          101336 :                          *rest != '-' && *rest != '+' &&
    1486           67556 :                          *rest != '/' &&
    1487           67556 :                          *rest != '(' && *rest != ')' && *rest != '[' && *rest != ']')
    1488           33778 :                 rest++;
    1489                 :           /* skip over uninteresting chars. */
    1490                 :         SKIP_MORE:
    1491           65486 :           while (*rest &&
    1492           51938 :                          (*rest == ' ' || *rest == '\t' ||
    1493           36134 :                           *rest == ',' || *rest == ';' || *rest == '/' ||
    1494           22584 :                           *rest == '(' || *rest == ')' || *rest == '[' || *rest == ']'))
    1495           13546 :                 rest++;
    1496                 : 
    1497                 :           /* "-" is ignored at the beginning of a token if we have not yet
    1498                 :                  parsed a year (e.g., the second "-" in "30-AUG-1966"), or if
    1499                 :                  the character after the dash is not a digit. */         
    1500           13553 :           if (*rest == '-' && ((rest > string &&
    1501               4 :               isalpha((unsigned char)rest[-1]) && year < 0) ||
    1502               2 :               rest[1] < '0' || rest[1] > '9'))
    1503                 :                 {
    1504               2 :                   rest++;
    1505               2 :                   goto SKIP_MORE;
    1506                 :                 }
    1507                 : 
    1508                 :         }
    1509                 : 
    1510           17477 :   if (zone != TT_UNKNOWN && zone_offset == -1)
    1511                 :         {
    1512            2162 :           switch (zone)
    1513                 :                 {
    1514               0 :                 case TT_PST: zone_offset = -8 * 60; break;
    1515               0 :                 case TT_PDT: zone_offset = -8 * 60; dst_offset = 1 * 60; break;
    1516               0 :                 case TT_MST: zone_offset = -7 * 60; break;
    1517               0 :                 case TT_MDT: zone_offset = -7 * 60; dst_offset = 1 * 60; break;
    1518               0 :                 case TT_CST: zone_offset = -6 * 60; break;
    1519               0 :                 case TT_CDT: zone_offset = -6 * 60; dst_offset = 1 * 60; break;
    1520               0 :                 case TT_EST: zone_offset = -5 * 60; break;
    1521               0 :                 case TT_EDT: zone_offset = -5 * 60; dst_offset = 1 * 60; break;
    1522               0 :                 case TT_AST: zone_offset = -4 * 60; break;
    1523               0 :                 case TT_NST: zone_offset = -3 * 60 - 30; break;
    1524            2162 :                 case TT_GMT: zone_offset =  0 * 60; break;
    1525               0 :                 case TT_BST: zone_offset =  0 * 60; dst_offset = 1 * 60; break;
    1526               0 :                 case TT_MET: zone_offset =  1 * 60; break;
    1527               0 :                 case TT_EET: zone_offset =  2 * 60; break;
    1528               0 :                 case TT_JST: zone_offset =  9 * 60; break;
    1529                 :                 default:
    1530               0 :                   PR_ASSERT (0);
    1531               0 :                   break;
    1532                 :                 }
    1533                 :         }
    1534                 : 
    1535                 :   /* If we didn't find a year, month, or day-of-the-month, we can't
    1536                 :          possibly parse this, and in fact, mktime() will do something random
    1537                 :          (I'm seeing it return "Tue Feb  5 06:28:16 2036", which is no doubt
    1538                 :          a numerologically significant date... */
    1539           17477 :   if (month == TT_UNKNOWN || date == -1 || year == -1 || year > PR_INT16_MAX)
    1540           15219 :       return PR_FAILURE;
    1541                 : 
    1542            2258 :   memset(result, 0, sizeof(*result));
    1543            2258 :   if (sec != -1)
    1544            2258 :         result->tm_sec = sec;
    1545            2258 :   if (min != -1)
    1546            2258 :         result->tm_min = min;
    1547            2258 :   if (hour != -1)
    1548            2258 :         result->tm_hour = hour;
    1549            2258 :   if (date != -1)
    1550            2258 :         result->tm_mday = date;
    1551            2258 :   if (month != TT_UNKNOWN)
    1552            2258 :         result->tm_month = (((int)month) - ((int)TT_JAN));
    1553            2258 :   if (year != -1)
    1554            2258 :         result->tm_year = year;
    1555            2258 :   if (dotw != TT_UNKNOWN)
    1556            2256 :         result->tm_wday = (((int)dotw) - ((int)TT_SUN));
    1557                 :   /*
    1558                 :    * Mainly to compute wday and yday, but normalized time is also required
    1559                 :    * by the check below that works around a Visual C++ 2005 mktime problem.
    1560                 :    */
    1561            2258 :   PR_NormalizeTime(result, PR_GMTParameters);
    1562                 :   /* The remaining work is to set the gmt and dst offsets in tm_params. */
    1563                 : 
    1564            2258 :   if (zone == TT_UNKNOWN && default_to_gmt)
    1565                 :         {
    1566                 :           /* No zone was specified, so pretend the zone was GMT. */
    1567              96 :           zone = TT_GMT;
    1568              96 :           zone_offset = 0;
    1569                 :         }
    1570                 : 
    1571            2258 :   if (zone_offset == -1)
    1572                 :          {
    1573                 :            /* no zone was specified, and we're to assume that everything
    1574                 :              is local. */
    1575                 :           struct tm localTime;
    1576                 :           time_t secs;
    1577                 : 
    1578               0 :           PR_ASSERT(result->tm_month > -1 &&
    1579                 :                     result->tm_mday > 0 &&
    1580                 :                     result->tm_hour > -1 &&
    1581                 :                     result->tm_min > -1 &&
    1582                 :                     result->tm_sec > -1);
    1583                 : 
    1584                 :             /*
    1585                 :              * To obtain time_t from a tm structure representing the local
    1586                 :              * time, we call mktime().  However, we need to see if we are
    1587                 :              * on 1-Jan-1970 or before.  If we are, we can't call mktime()
    1588                 :              * because mktime() will crash on win16. In that case, we
    1589                 :              * calculate zone_offset based on the zone offset at 
    1590                 :              * 00:00:00, 2 Jan 1970 GMT, and subtract zone_offset from the
    1591                 :              * date we are parsing to transform the date to GMT.  We also
    1592                 :              * do so if mktime() returns (time_t) -1 (time out of range).
    1593                 :            */
    1594                 : 
    1595                 :           /* month, day, hours, mins and secs are always non-negative
    1596                 :              so we dont need to worry about them. */  
    1597               0 :           if(result->tm_year >= 1970)
    1598                 :                 {
    1599                 :                   PRInt64 usec_per_sec;
    1600                 : 
    1601               0 :                   localTime.tm_sec = result->tm_sec;
    1602               0 :                   localTime.tm_min = result->tm_min;
    1603               0 :                   localTime.tm_hour = result->tm_hour;
    1604               0 :                   localTime.tm_mday = result->tm_mday;
    1605               0 :                   localTime.tm_mon = result->tm_month;
    1606               0 :                   localTime.tm_year = result->tm_year - 1900;
    1607                 :                   /* Set this to -1 to tell mktime "I don't care".  If you set
    1608                 :                      it to 0 or 1, you are making assertions about whether the
    1609                 :                      date you are handing it is in daylight savings mode or not;
    1610                 :                      and if you're wrong, it will "fix" it for you. */
    1611               0 :                   localTime.tm_isdst = -1;
    1612                 : 
    1613                 : #if _MSC_VER == 1400  /* 1400 = Visual C++ 2005 (8.0) */
    1614                 :                   /*
    1615                 :                    * mktime will return (time_t) -1 if the input is a date
    1616                 :                    * after 23:59:59, December 31, 3000, US Pacific Time (not
    1617                 :                    * UTC as documented): 
    1618                 :                    * http://msdn.microsoft.com/en-us/library/d1y53h2a(VS.80).aspx
    1619                 :                    * But if the year is 3001, mktime also invokes the invalid
    1620                 :                    * parameter handler, causing the application to crash.  This
    1621                 :                    * problem has been reported in
    1622                 :                    * http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=266036.
    1623                 :                    * We avoid this crash by not calling mktime if the date is
    1624                 :                    * out of range.  To use a simple test that works in any time
    1625                 :                    * zone, we consider year 3000 out of range as well.  (See
    1626                 :                    * bug 480740.)
    1627                 :                    */
    1628                 :                   if (result->tm_year >= 3000) {
    1629                 :                       /* Emulate what mktime would have done. */
    1630                 :                       errno = EINVAL;
    1631                 :                       secs = (time_t) -1;
    1632                 :                   } else {
    1633                 :                       secs = mktime(&localTime);
    1634                 :                   }
    1635                 : #else
    1636               0 :                   secs = mktime(&localTime);
    1637                 : #endif
    1638               0 :                   if (secs != (time_t) -1)
    1639                 :                     {
    1640                 :                       PRTime usecs64;
    1641               0 :                       LL_I2L(usecs64, secs);
    1642               0 :                       LL_I2L(usec_per_sec, PR_USEC_PER_SEC);
    1643               0 :                       LL_MUL(usecs64, usecs64, usec_per_sec);
    1644               0 :                       PR_ExplodeTime(usecs64, PR_LocalTimeParameters, result);
    1645               0 :                       return PR_SUCCESS;
    1646                 :                     }
    1647                 :                 }
    1648                 :                 
    1649                 :                 /* So mktime() can't handle this case.  We assume the
    1650                 :                    zone_offset for the date we are parsing is the same as
    1651                 :                    the zone offset on 00:00:00 2 Jan 1970 GMT. */
    1652               0 :                 secs = 86400;
    1653               0 :                 (void) MT_safe_localtime(&secs, &localTime);
    1654               0 :                 zone_offset = localTime.tm_min
    1655               0 :                               + 60 * localTime.tm_hour
    1656               0 :                               + 1440 * (localTime.tm_mday - 2);
    1657                 :         }
    1658                 : 
    1659            2258 :   result->tm_params.tp_gmt_offset = zone_offset * 60;
    1660            2258 :   result->tm_params.tp_dst_offset = dst_offset * 60;
    1661                 : 
    1662            2258 :   return PR_SUCCESS;
    1663                 : }
    1664                 : 
    1665                 : PR_IMPLEMENT(PRStatus)
    1666           17477 : PR_ParseTimeString(
    1667                 :         const char *string,
    1668                 :         PRBool default_to_gmt,
    1669                 :         PRTime *result)
    1670                 : {
    1671                 :   PRExplodedTime tm;
    1672                 :   PRStatus rv;
    1673                 : 
    1674           17477 :   rv = PR_ParseTimeStringToExplodedTime(string,
    1675                 :                                         default_to_gmt,
    1676                 :                                         &tm);
    1677           17477 :   if (rv != PR_SUCCESS)
    1678           15219 :         return rv;
    1679                 : 
    1680            2258 :   *result = PR_ImplodeTime(&tm);
    1681                 : 
    1682            2258 :   return PR_SUCCESS;
    1683                 : }
    1684                 : 
    1685                 : /*
    1686                 :  *******************************************************************
    1687                 :  *******************************************************************
    1688                 :  **
    1689                 :  **    OLD COMPATIBILITY FUNCTIONS
    1690                 :  **
    1691                 :  *******************************************************************
    1692                 :  *******************************************************************
    1693                 :  */
    1694                 : 
    1695                 : 
    1696                 : /*
    1697                 :  *-----------------------------------------------------------------------
    1698                 :  *
    1699                 :  * PR_FormatTime --
    1700                 :  *
    1701                 :  *     Format a time value into a buffer. Same semantics as strftime().
    1702                 :  *
    1703                 :  *-----------------------------------------------------------------------
    1704                 :  */
    1705                 : 
    1706                 : PR_IMPLEMENT(PRUint32)
    1707               0 : PR_FormatTime(char *buf, int buflen, const char *fmt, const PRExplodedTime *tm)
    1708                 : {
    1709                 :     size_t rv;
    1710                 :     struct tm a;
    1711                 :     struct tm *ap;
    1712                 : 
    1713               0 :     if (tm) {
    1714               0 :         ap = &a;
    1715               0 :         a.tm_sec = tm->tm_sec;
    1716               0 :         a.tm_min = tm->tm_min;
    1717               0 :         a.tm_hour = tm->tm_hour;
    1718               0 :         a.tm_mday = tm->tm_mday;
    1719               0 :         a.tm_mon = tm->tm_month;
    1720               0 :         a.tm_wday = tm->tm_wday;
    1721               0 :         a.tm_year = tm->tm_year - 1900;
    1722               0 :         a.tm_yday = tm->tm_yday;
    1723               0 :         a.tm_isdst = tm->tm_params.tp_dst_offset ? 1 : 0;
    1724                 : 
    1725                 :         /*
    1726                 :          * On some platforms, for example SunOS 4, struct tm has two
    1727                 :          * additional fields: tm_zone and tm_gmtoff.
    1728                 :          */
    1729                 : 
    1730                 : #if defined(SUNOS4) || (__GLIBC__ >= 2) || defined(XP_BEOS) \
    1731                 :         || defined(NETBSD) || defined(OPENBSD) || defined(FREEBSD) \
    1732                 :         || defined(DARWIN) || defined(SYMBIAN) || defined(ANDROID)
    1733               0 :         a.tm_zone = NULL;
    1734               0 :         a.tm_gmtoff = tm->tm_params.tp_gmt_offset +
    1735               0 :                       tm->tm_params.tp_dst_offset;
    1736                 : #endif
    1737                 :     } else {
    1738               0 :         ap = NULL;
    1739                 :     }
    1740                 : 
    1741               0 :     rv = strftime(buf, buflen, fmt, ap);
    1742               0 :     if (!rv && buf && buflen > 0) {
    1743                 :         /*
    1744                 :          * When strftime fails, the contents of buf are indeterminate.
    1745                 :          * Some callers don't check the return value from this function,
    1746                 :          * so store an empty string in buf in case they try to print it.
    1747                 :          */
    1748               0 :         buf[0] = '\0';
    1749                 :     }
    1750               0 :     return rv;
    1751                 : }
    1752                 : 
    1753                 : 
    1754                 : /*
    1755                 :  * The following string arrays and macros are used by PR_FormatTimeUSEnglish().
    1756                 :  */
    1757                 : 
    1758                 : static const char* abbrevDays[] =
    1759                 : {
    1760                 :    "Sun","Mon","Tue","Wed","Thu","Fri","Sat"
    1761                 : };
    1762                 : 
    1763                 : static const char* days[] =
    1764                 : {
    1765                 :    "Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"
    1766                 : };
    1767                 : 
    1768                 : static const char* abbrevMonths[] =
    1769                 : {
    1770                 :    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
    1771                 :    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
    1772                 : };
    1773                 : 
    1774                 : static const char* months[] =
    1775                 : { 
    1776                 :     "January", "February", "March", "April", "May", "June",
    1777                 :     "July", "August", "September", "October", "November", "December"
    1778                 : };
    1779                 : 
    1780                 : 
    1781                 : /*
    1782                 :  * Add a single character to the given buffer, incrementing the buffer pointer
    1783                 :  * and decrementing the buffer size. Return 0 on error.
    1784                 :  */
    1785                 : #define ADDCHAR( buf, bufSize, ch )             \
    1786                 : do                                              \
    1787                 : {                                               \
    1788                 :    if( bufSize < 1 )                            \
    1789                 :    {                                            \
    1790                 :       *(--buf) = '\0';                          \
    1791                 :       return 0;                                 \
    1792                 :    }                                            \
    1793                 :    *buf++ = ch;                                 \
    1794                 :    bufSize--;                                   \
    1795                 : }                                               \
    1796                 : while(0)
    1797                 : 
    1798                 : 
    1799                 : /*
    1800                 :  * Add a string to the given buffer, incrementing the buffer pointer
    1801                 :  * and decrementing the buffer size appropriately.  Return 0 on error.
    1802                 :  */
    1803                 : #define ADDSTR( buf, bufSize, str )             \
    1804                 : do                                              \
    1805                 : {                                               \
    1806                 :    PRUint32 strSize = strlen( str );              \
    1807                 :    if( strSize > bufSize )                      \
    1808                 :    {                                            \
    1809                 :       if( bufSize==0 )                          \
    1810                 :          *(--buf) = '\0';                       \
    1811                 :       else                                      \
    1812                 :          *buf = '\0';                           \
    1813                 :       return 0;                                 \
    1814                 :    }                                            \
    1815                 :    memcpy(buf, str, strSize);                   \
    1816                 :    buf += strSize;                              \
    1817                 :    bufSize -= strSize;                          \
    1818                 : }                                               \
    1819                 : while(0)
    1820                 : 
    1821                 : /* Needed by PR_FormatTimeUSEnglish() */
    1822                 : static unsigned int  pr_WeekOfYear(const PRExplodedTime* time,
    1823                 :         unsigned int firstDayOfWeek);
    1824                 : 
    1825                 : 
    1826                 : /***********************************************************************************
    1827                 :  *
    1828                 :  * Description:
    1829                 :  *  This is a dumbed down version of strftime that will format the date in US
    1830                 :  *  English regardless of the setting of the global locale.  This functionality is
    1831                 :  *  needed to write things like MIME headers which must always be in US English.
    1832                 :  *
    1833                 :  **********************************************************************************/
    1834                 :              
    1835                 : PR_IMPLEMENT(PRUint32)
    1836             242 : PR_FormatTimeUSEnglish( char* buf, PRUint32 bufSize,
    1837                 :                         const char* format, const PRExplodedTime* time )
    1838                 : {
    1839             242 :    char*         bufPtr = buf;
    1840                 :    const char*   fmtPtr;
    1841                 :    char          tmpBuf[ 40 ];        
    1842             242 :    const int     tmpBufSize = sizeof( tmpBuf );
    1843                 : 
    1844                 :    
    1845            6630 :    for( fmtPtr=format; *fmtPtr != '\0'; fmtPtr++ )
    1846                 :    {
    1847            6388 :       if( *fmtPtr != '%' )
    1848                 :       {
    1849            3694 :          ADDCHAR( bufPtr, bufSize, *fmtPtr );
    1850                 :       }
    1851                 :       else
    1852                 :       {
    1853            2694 :          switch( *(++fmtPtr) )
    1854                 :          {
    1855                 :          case '%':
    1856                 :             /* escaped '%' character */
    1857            1000 :             ADDCHAR( bufPtr, bufSize, '%' );
    1858            1000 :             break;
    1859                 :             
    1860                 :          case 'a':
    1861                 :             /* abbreviated weekday name */
    1862             242 :             ADDSTR( bufPtr, bufSize, abbrevDays[ time->tm_wday ] );
    1863             242 :             break;
    1864                 :                
    1865                 :          case 'A':
    1866                 :             /* full weekday name */
    1867               0 :             ADDSTR( bufPtr, bufSize, days[ time->tm_wday ] );
    1868               0 :             break;
    1869                 :         
    1870                 :          case 'b':
    1871                 :             /* abbreviated month name */
    1872             242 :             ADDSTR( bufPtr, bufSize, abbrevMonths[ time->tm_month ] );
    1873             242 :             break;
    1874                 :         
    1875                 :          case 'B':
    1876                 :             /* full month name */
    1877               0 :             ADDSTR(bufPtr, bufSize,  months[ time->tm_month ] );
    1878               0 :             break;
    1879                 :         
    1880                 :          case 'c':
    1881                 :             /* Date and time. */
    1882               0 :             PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%a %b %d %H:%M:%S %Y", time );
    1883               0 :             ADDSTR( bufPtr, bufSize, tmpBuf );
    1884               0 :             break;
    1885                 :         
    1886                 :          case 'd':
    1887                 :             /* day of month ( 01 - 31 ) */
    1888             242 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_mday );
    1889             242 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1890             242 :             break;
    1891                 : 
    1892                 :          case 'H':
    1893                 :             /* hour ( 00 - 23 ) */
    1894             242 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_hour );
    1895             242 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1896             242 :             break;
    1897                 :         
    1898                 :          case 'I':
    1899                 :             /* hour ( 01 - 12 ) */
    1900               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",
    1901               0 :                         (time->tm_hour%12) ? time->tm_hour%12 : (PRInt32) 12 );
    1902               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1903               0 :             break;
    1904                 :         
    1905                 :          case 'j':
    1906                 :             /* day number of year ( 001 - 366 ) */
    1907               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.3d",time->tm_yday + 1);
    1908               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1909               0 :             break;
    1910                 :         
    1911                 :          case 'm':
    1912                 :             /* month number ( 01 - 12 ) */
    1913               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_month+1);
    1914               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1915               0 :             break;
    1916                 :         
    1917                 :          case 'M':
    1918                 :             /* minute ( 00 - 59 ) */
    1919             242 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_min );
    1920             242 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1921             242 :             break;
    1922                 :        
    1923                 :          case 'p':
    1924                 :             /* locale's equivalent of either AM or PM */
    1925               0 :             ADDSTR( bufPtr, bufSize, (time->tm_hour<12)?"AM":"PM" ); 
    1926               0 :             break;
    1927                 :         
    1928                 :          case 'S':
    1929                 :             /* seconds ( 00 - 61 ), allows for leap seconds */
    1930             242 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2ld",time->tm_sec );
    1931             242 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1932             242 :             break;
    1933                 :      
    1934                 :          case 'U':
    1935                 :             /* week number of year ( 00 - 53  ),  Sunday  is  the first day of week 1 */
    1936               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 0 ) );
    1937               0 :             ADDSTR( bufPtr, bufSize, tmpBuf );
    1938               0 :             break;
    1939                 :         
    1940                 :          case 'w':
    1941                 :             /* weekday number ( 0 - 6 ), Sunday = 0 */
    1942               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%d",time->tm_wday );
    1943               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1944               0 :             break;
    1945                 :         
    1946                 :          case 'W':
    1947                 :             /* Week number of year ( 00 - 53  ),  Monday  is  the first day of week 1 */
    1948               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2d", pr_WeekOfYear( time, 1 ) );
    1949               0 :             ADDSTR( bufPtr, bufSize, tmpBuf );
    1950               0 :             break;
    1951                 :         
    1952                 :          case 'x':
    1953                 :             /* Date representation */
    1954               0 :             PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%m/%d/%y", time );
    1955               0 :             ADDSTR( bufPtr, bufSize, tmpBuf );
    1956               0 :             break;
    1957                 :         
    1958                 :          case 'X':
    1959                 :             /* Time representation. */
    1960               0 :             PR_FormatTimeUSEnglish( tmpBuf, tmpBufSize, "%H:%M:%S", time );
    1961               0 :             ADDSTR( bufPtr, bufSize, tmpBuf );
    1962               0 :             break;
    1963                 :         
    1964                 :          case 'y':
    1965                 :             /* year within century ( 00 - 99 ) */
    1966               0 :             PR_snprintf(tmpBuf,tmpBufSize,"%.2d",time->tm_year % 100 );
    1967               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1968               0 :             break;
    1969                 :         
    1970                 :          case 'Y':
    1971                 :             /* year as ccyy ( for example 1986 ) */
    1972             242 :             PR_snprintf(tmpBuf,tmpBufSize,"%.4d",time->tm_year );
    1973             242 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1974             242 :             break;
    1975                 :         
    1976                 :          case 'Z':
    1977                 :             /* Time zone name or no characters if  no  time  zone exists.
    1978                 :              * Since time zone name is supposed to be independant of locale, we
    1979                 :              * defer to PR_FormatTime() for this option.
    1980                 :              */
    1981               0 :             PR_FormatTime( tmpBuf, tmpBufSize, "%Z", time );
    1982               0 :             ADDSTR( bufPtr, bufSize, tmpBuf ); 
    1983               0 :             break;
    1984                 : 
    1985                 :          default:
    1986                 :             /* Unknown format.  Simply copy format into output buffer. */
    1987               0 :             ADDCHAR( bufPtr, bufSize, '%' );
    1988               0 :             ADDCHAR( bufPtr, bufSize, *fmtPtr );
    1989               0 :             break;
    1990                 :             
    1991                 :          }
    1992                 :       }
    1993                 :    }
    1994                 : 
    1995             242 :    ADDCHAR( bufPtr, bufSize, '\0' );
    1996             242 :    return (PRUint32)(bufPtr - buf - 1);
    1997                 : }
    1998                 : 
    1999                 : 
    2000                 : 
    2001                 : /***********************************************************************************
    2002                 :  *
    2003                 :  * Description:
    2004                 :  *  Returns the week number of the year (0-53) for the given time.  firstDayOfWeek
    2005                 :  *  is the day on which the week is considered to start (0=Sun, 1=Mon, ...).
    2006                 :  *  Week 1 starts the first time firstDayOfWeek occurs in the year.  In other words,
    2007                 :  *  a partial week at the start of the year is considered week 0.  
    2008                 :  *
    2009                 :  **********************************************************************************/
    2010                 : 
    2011                 : static unsigned int
    2012               0 : pr_WeekOfYear(const PRExplodedTime* time, unsigned int firstDayOfWeek)
    2013                 : {
    2014                 :    int dayOfWeek;
    2015                 :    int dayOfYear;
    2016                 : 
    2017                 :   /* Get the day of the year for the given time then adjust it to represent the
    2018                 :    * first day of the week containing the given time.
    2019                 :    */
    2020               0 :   dayOfWeek = time->tm_wday - firstDayOfWeek;
    2021               0 :   if (dayOfWeek < 0)
    2022               0 :     dayOfWeek += 7;
    2023                 :   
    2024               0 :   dayOfYear = time->tm_yday - dayOfWeek;
    2025                 : 
    2026                 : 
    2027               0 :   if( dayOfYear <= 0 )
    2028                 :   {
    2029                 :      /* If dayOfYear is <= 0, it is in the first partial week of the year. */
    2030               0 :      return 0;
    2031                 :   }
    2032                 :   else
    2033                 :   {
    2034                 :      /* Count the number of full weeks ( dayOfYear / 7 ) then add a week if there
    2035                 :       * are any days left over ( dayOfYear % 7 ).  Because we are only counting to
    2036                 :       * the first day of the week containing the given time, rather than to the
    2037                 :       * actual day representing the given time, any days in week 0 will be "absorbed"
    2038                 :       * as extra days in the given week.
    2039                 :       */
    2040               0 :      return (dayOfYear / 7) + ( (dayOfYear % 7) == 0 ? 0 : 1 );
    2041                 :   }
    2042                 : }
    2043                 : 

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