dlls/ntdll/time.c

   1 /*
   2  * Nt time functions.
   3  *
   4  * RtlTimeToTimeFields, RtlTimeFieldsToTime and defines are taken from ReactOS and
   5  * adapted to wine with special permissions of the author. This code is
   6  * Copyright 2002 Rex Jolliff (rex@lvcablemodem.com)
   7  *
   8  * Copyright 1999 Juergen Schmied
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include "config.h"
  26 #include "wine/port.h"
  27
  28 #include <stdarg.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include <time.h>
  33 #ifdef HAVE_SYS_TIME_H
  34 # include <sys/time.h>
  35 #endif
  36 #ifdef HAVE_UNISTD_H
  37 # include <unistd.h>
  38 #endif
  39
  40 #define NONAMELESSUNION
  41 #define NONAMELESSSTRUCT
  42 #include "windef.h"
  43 #include "winbase.h"
  44 #include "winreg.h"
  45 #include "winternl.h"
  46 #include "wine/unicode.h"
  47 #include "wine/debug.h"
  48 #include "ntdll_misc.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(ntdll);
  51
  52 static CRITICAL_SECTION TIME_GetBias_section;
  53 static CRITICAL_SECTION_DEBUG critsect_debug =
  54 {
  55     0, 0, &TIME_GetBias_section,
  56     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  57       0, 0, { 0, (DWORD)(__FILE__ ": TIME_GetBias_section") }
  58 };
  59 static CRITICAL_SECTION TIME_GetBias_section = { &critsect_debug, -1, 0, 0, 0, 0 };
  60
  61 /* TimeZone registry key values */
  62 static const WCHAR TZInformationKeyW[] = { 'M','a','c','h','i','n','e','\\',
  63  'S','Y','S','T','E','M','\\','C','u','r','r','e','n','t','C','o','n','t','r',
  64  'o','l','S','e','t','\\','C','o','n','t','r','o','l','\\','T','i','m','e','z',
  65  'o','n','e','I','n','f','o','r','m','a','t','i','o','n', 0};
  66 static const WCHAR TZStandardStartW[] = {
  67   'S','t','a','n','d','a','r','d','s','t','a','r','t', 0};
  68 static const WCHAR TZDaylightStartW[] = {
  69   'D','a','y','l','i','g','h','t','s','t','a','r','t', 0};
  70 static const WCHAR TZDaylightBiasW[] = {
  71     'D','a','y','l','i','g','h','t','B','i','a','s', 0};
  72 static const WCHAR TZStandardBiasW[] = {
  73     'S','t','a','n','d','a','r','d','B','i','a','s', 0};
  74 static const WCHAR TZBiasW[] = {'B','i','a','s', 0};
  75 static const WCHAR TZDaylightNameW[] = {
  76     'D','a','y','l','i','g','h','t','N','a','m','e', 0};
  77 static const WCHAR TZStandardNameW[] = {
  78     'S','t','a','n','d','a','r','d','N','a','m','e', 0};
  79
  80
  81 #define SETTIME_MAX_ADJUST 120
  82
  83 /* This structure is used to store strings that represent all of the time zones
  84  * in the world. (This is used to help GetTimeZoneInformation)
  85  */
  86 struct tagTZ_INFO
  87 {
  88     const char *psTZFromUnix;
  89     WCHAR psTZWindows[32];
  90     int bias;
  91     int dst;
  92 };
  93
  94 static const struct tagTZ_INFO TZ_INFO[] =
  95 {
  96    {"MHT",
  97     {'D','a','t','e','l','i','n','e',' ','S','t','a','n','d','a','r','d',' ',
  98      'T','i','m','e','\0'}, -720, 0},
  99    {"SST",
 100     {'S','a','m','o','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 101      'e','\0'}, 660, 0},
 102    {"HST",
 103     {'H','a','w','a','i','i','a','n',' ','S','t','a','n','d','a','r','d',' ',
 104      'T','i','m','e','\0'}, 600, 0},
 105    {"AKDT",
 106     {'A','l','a','s','k','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 107      'i','m','e','\0'}, 480, 1},
 108    {"PST",
 109     {'P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r','d',' ','T',
 110      'i','m','e','\0'}, 480, 0},
 111    {"PDT",
 112     {'P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r','d',' ','T',
 113      'i','m','e','\0'}, 420, 1},
 114    {"MST",
 115     {'U','S',' ','M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a',
 116      'r','d',' ','T','i','m','e','\0'}, 420, 0},
 117    {"MDT",
 118     {'M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a','r','d',' ',
 119      'T','i','m','e','\0'}, 360, 1},
 120    {"CST",
 121     {'C','e','n','t','r','a','l',' ','A','m','e','r','i','c','a',' ','S','t',
 122      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, 360, 0},
 123    {"CDT",
 124     {'C','e','n','t','r','a','l',' ','S','t','a','n','d','a','r','d',' ','T',
 125      'i','m','e','\0'}, 300, 1},
 126    {"COT",
 127     {'S','A',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r',
 128      'd',' ','T','i','m','e','\0'}, 300, 0},
 129    {"EDT",
 130     {'E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r','d',' ','T',
 131      'i','m','e','\0'}, 240, 1},
 132    {"EST",
 133     {'U','S',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 134      'd',' ','T','i','m','e','\0'}, 300, 0},
 135    {"ECT",
 136     {'E','a','s','t','e','r','n',' ','C','e','n','t','r','a','l',' ','S','t','a','n','d','a','r',
 137      'd',' ','T','i','m','e','\0'}, 300, 0},
 138    {"ADT",
 139     {'A','t','l','a','n','t','i','c',' ','S','t','a','n','d','a','r','d',' ',
 140      'T','i','m','e','\0'}, 180, 1},
 141    {"VET",
 142     {'S','A',' ','W','e','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 143      'd',' ','T','i','m','e','\0'}, 240, 0},
 144    {"CLT",
 145     {'P','a','c','i','f','i','c',' ','S','A',' ','S','t','a','n','d','a','r',
 146      'd',' ','T','i','m','e','\0'}, 240, 0},
 147    {"NDT",
 148     {'N','e','w','f','o','u','n','d','l','a','n','d',' ','S','t','a','n','d',
 149      'a','r','d',' ','T','i','m','e','\0'}, 150, 1},
 150    {"BRT",
 151     {'B','r','a','z','i','l','i','a','n',' ','S','t','a','n','d','a','r','d',
 152      ' ','T','i','m','e','\0'}, 180, 0},
 153    {"BRST",
 154     {'B','r','a','z','i','l','i','a','n',' ','S','u','m','m','e','r',
 155      ' ','T','i','m','e','\0'}, 120, 1},
 156    {"ART",
 157     {'S','A',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 158      'd',' ','T','i','m','e','\0'}, 180, 0},
 159    {"WGST",
 160     {'G','r','e','e','n','l','a','n','d',' ','S','t','a','n','d','a','r','d',
 161      ' ','T','i','m','e','\0'}, 120, 1},
 162    {"GST",
 163     {'M','i','d','-','A','t','l','a','n','t','i','c',' ','S','t','a','n','d',
 164      'a','r','d',' ','T','i','m','e','\0'}, 120, 0},
 165    {"AZOST",
 166     {'A','z','o','r','e','s',' ','S','t','a','n','d','a','r','d',' ','T','i',
 167      'm','e','\0'}, 0, 1},
 168    {"CVT",
 169     {'C','a','p','e',' ','V','e','r','d','e',' ','S','t','a','n','d','a','r',
 170      'd',' ','T','i','m','e','\0'}, 60, 0},
 171    {"WEST",
 172     {'W','e','s','t','e','r','n',' ','E','u','r','o','p','e','a','n',' ','S','u','m','m','e','r',' ','T','i','m','e','\0'}, -60, 1},
 173    {"WET",
 174     {'G','r','e','e','n','w','i','c','h',' ','S','t','a','n','d','a','r','d',
 175      ' ','T','i','m','e','\0'}, 0, 0},
 176    {"BST",
 177     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 178     -60, 1},
 179    {"IST",
 180     {'I','r','i','s','h',' ','S','u','m','m','e','r',' ','T','i','m','e','\0'},
 181     -60, 1},
 182    {"GMT",
 183     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 184     0, 0},
 185    {"UTC",
 186     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 187     0, 0},
 188    {"CET",
 189     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e','a','n',' ',
 190      'T','i','m','e','\0'}, -60, 0},
 191    {"CEST",
 192     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','S','t','a',
 193      'n','d','a','r','d',' ','T','i','m','e','\0'}, -120, 1},
 194    {"MET",
 195     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','S','t','a',
 196      'n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 0},
 197    {"MEST",
 198     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','D','a','y',
 199      'l','i','g','h','t',' ','T','i','m','e','\0'}, -120, 1},
 200    {"WAT",
 201     {'W','.',' ','C','e','n','t','r','a','l',' ','A','f','r','i','c','a',' ',
 202      'S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 0},
 203    {"EEST",
 204     {'E','.',' ','E','u','r','o','p','e',' ','S','t','a','n','d','a','r','d',
 205      ' ','T','i','m','e','\0'}, -180, 1},
 206    {"EET",
 207     {'E','g','y','p','t',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 208      'e','\0'}, -120, 0},
 209    {"CAT",
 210     {'C','e','n','t','r','a','l',' ','A','f','r','i','c','a','n',' '
 211     ,'T','i','m','e','\0'}, -120, 0},
 212    {"SAST",
 213     {'S','o','u','t','h',' ','A','f','r','i','c','a',' ','S','t','a','n','d',
 214      'a','r','d',' ','T','i','m','e','\0'}, -120, 0},
 215    {"IST",
 216     {'I','s','r','a','e','l',' ','S','t','a','n','d','a','r','d',' ','T','i',
 217      'm','e','\0'}, -120, 0},
 218    {"MSK",
 219     {'R','u','s','s','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 220      'i','m','e','\0'}, -180, 0},
 221    {"ADT",
 222     {'A','r','a','b','i','c',' ','S','t','a','n','d','a','r','d',' ','T','i',
 223      'm','e','\0'}, -240, 1},
 224    {"AST",
 225     {'A','r','a','b',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 226      '\0'}, -180, 0},
 227    {"MSD",
 228     {'R','u','s','s','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 229      'i','m','e','\0'}, -240, 1},
 230    {"EAT",
 231     {'E','.',' ','A','f','r','i','c','a',' ','S','t','a','n','d','a','r','d',
 232      ' ','T','i','m','e','\0'}, -180, 0},
 233    {"IRST",
 234     {'I','r','a','n',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 235      '\0'}, -270, 1},
 236    {"GST",
 237     {'A','r','a','b','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 238      'i','m','e','\0'}, -240, 0},
 239    {"AZST",
 240     {'C','a','u','c','a','s','u','s',' ','S','t','a','n','d','a','r','d',' ',
 241      'T','i','m','e','\0'}, -300, 1},
 242    {"AFT",
 243     {'A','f','g','h','a','n','i','s','t','a','n',' ','S','t','a','n','d','a',
 244      'r','d',' ','T','i','m','e','\0'}, -270, 0},
 245    {"SAMT",
 246     {'S','a','m','a','r','a',' ','S','t','a','n','d','a','r','d',' ','T','i',
 247      'm','e','\0'}, -270, 1},
 248    {"YEKST",
 249     {'E','k','a','t','e','r','i','n','b','u','r','g',' ','S','t','a','n','d',
 250      'a','r','d',' ','T','i','m','e','\0'}, -360, 1},
 251    {"PKT",
 252     {'W','e','s','t',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d',
 253      ' ','T','i','m','e','\0'}, -300, 0},
 254    {"IST",
 255     {'I','n','d','i','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 256      'e','\0'}, -330, 0},
 257    {"NPT",
 258     {'N','e','p','a','l',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 259      'e','\0'}, -345, 0},
 260    {"ALMST",
 261     {'N','.',' ','C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t',
 262      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -420, 1},
 263    {"BDT",
 264     {'C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t','a','n','d',
 265      'a','r','d',' ','T','i','m','e','\0'}, -360, 0},
 266    {"LKT",
 267     {'S','r','i',' ','L','a','n','k','a',' ','S','t','a','n','d','a','r','d',
 268      ' ','T','i','m','e','\0'}, -360, 0},
 269    {"MMT",
 270     {'M','y','a','n','m','a','r',' ','S','t','a','n','d','a','r','d',' ','T',
 271      'i','m','e','\0'}, -390, 0},
 272    {"ICT",
 273     {'S','E',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d',' ','T',
 274      'i','m','e','\0'}, -420, 0},
 275    {"KRAST",
 276     {'N','o','r','t','h',' ','A','s','i','a',' ','S','t','a','n','d','a','r',
 277      'd',' ','T','i','m','e','\0'}, -480, 1},
 278    {"CST",
 279     {'C','h','i','n','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 280      'e','\0'}, -480, 0},
 281    {"IRKST",
 282     {'N','o','r','t','h',' ','A','s','i','a',' ','E','a','s','t',' ','S','t',
 283      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -540, 1},
 284    {"SGT",
 285     {'M','a','l','a','y',' ','P','e','n','i','n','s','u','l','a',' ','S','t',
 286      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -480, 0},
 287    {"WST",
 288     {'W','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 289      'a','r','d',' ','T','i','m','e','\0'}, -480, 0},
 290    {"JST",
 291     {'T','o','k','y','o',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 292      'e','\0'}, -540, 0},
 293    {"KST",
 294     {'K','o','r','e','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 295      'e','\0'}, -540, 0},
 296    {"YAKST",
 297     {'Y','a','k','u','t','s','k',' ','S','t','a','n','d','a','r','d',' ','T',
 298      'i','m','e','\0'}, -600, 1},
 299    {"CST",
 300     {'C','e','n','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a',
 301      'n','d','a','r','d',' ','T','i','m','e','\0'}, -570, 0},
 302    {"EST",
 303     {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 304      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},
 305    {"EST",
 306     {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 307      'a','r','d',' ','T','i','m','e','\0'}, -660, 1},
 308    {"GST",
 309     {'W','e','s','t',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d',
 310      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},
 311    {"VLAST",
 312     {'V','l','a','d','i','v','o','s','t','o','k',' ','S','t','a','n','d','a',
 313      'r','d',' ','T','i','m','e','\0'}, -660, 1},
 314    {"MAGST",
 315     {'C','e','n','t','r','a','l',' ','P','a','c','i','f','i','c',' ','S','t',
 316      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -720, 1},
 317    {"NZST",
 318     {'N','e','w',' ','Z','e','a','l','a','n','d',' ','S','t','a','n','d','a',
 319      'r','d',' ','T','i','m','e','\0'}, -720, 0},
 320    {"NZDT",
 321     {'N','e','w',' ','Z','e','a','l','a','n','d',' ','D','a','y','l','i','g',
 322      'h','t',' ','T','i','m','e','\0'}, -780, 1},
 323    {"FJT",
 324     {'F','i','j','i',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 325      '\0'}, -720, 0},
 326    {"TOT",
 327     {'T','o','n','g','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 328      'e','\0'}, -780, 0},
 329    {"NOVT",
 330     {'N','o','v','o','s','i','b','i','r','s','k',' ','S','t','a','n','d','a',
 331      'r','d',' ','T','i','m','e','\0'}, -360, 1},
 332    {"ANAT",
 333     {'A','n','a','d','y','r',' ','S','t','a','n','d','a','r','d',' ','T','i',
 334      'm','e','\0'}, -720, 1},
 335    {"HKT",
 336     {'H','o','n','g',' ','K','o','n','g',' ','S','t','a','n','d','a','r','d',
 337      ' ','T','i','m','e','\0'}, -480, 0},
 338    {"UYT",
 339     {'U','r','u','g','u','a','y','a','n',' ','T','i','m','e','\0'}, 180, 0}
 340 };
 341
 342 #define TICKSPERSEC        10000000
 343 #define TICKSPERMSEC       10000
 344 #define SECSPERDAY         86400
 345 #define SECSPERHOUR        3600
 346 #define SECSPERMIN         60
 347 #define MINSPERHOUR        60
 348 #define HOURSPERDAY        24
 349 #define EPOCHWEEKDAY       1  /* Jan 1, 1601 was Monday */
 350 #define DAYSPERWEEK        7
 351 #define EPOCHYEAR          1601
 352 #define DAYSPERNORMALYEAR  365
 353 #define DAYSPERLEAPYEAR    366
 354 #define MONSPERYEAR        12
 355 #define DAYSPERQUADRICENTENNIUM (365 * 400 + 97)
 356 #define DAYSPERNORMALCENTURY (365 * 100 + 24)
 357 #define DAYSPERNORMALQUADRENNIUM (365 * 4 + 1)
 358
 359 /* 1601 to 1970 is 369 years plus 89 leap days */
 360 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
 361 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 362 /* 1601 to 1980 is 379 years plus 91 leap days */
 363 #define SECS_1601_TO_1980  ((379 * 365 + 91) * (ULONGLONG)SECSPERDAY)
 364 #define TICKS_1601_TO_1980 (SECS_1601_TO_1980 * TICKSPERSEC)
 365 /* max ticks that can be represented as Unix time */
 366 #define TICKS_1601_TO_UNIX_MAX ((SECS_1601_TO_1970 + INT_MAX) * TICKSPERSEC)
 367
 368
 369 static const int MonthLengths[2][MONSPERYEAR] =
 370 {
 371         { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
 372         { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
 373 };
 374
 375 static inline int IsLeapYear(int Year)
 376 {
 377         return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
 378 }
 379
 380 /***********************************************************************
 381  *              NTDLL_get_server_timeout
 382  *
 383  * Convert a NTDLL timeout into a timeval struct to send to the server.
 384  */
 385 void NTDLL_get_server_timeout( abs_time_t *when, const LARGE_INTEGER *timeout )
 386 {
 387     UINT remainder;
 388
 389     if (!timeout)  /* infinite timeout */
 390     {
 391         when->sec = when->usec = 0;
 392     }
 393     else if (timeout->QuadPart <= 0)  /* relative timeout */
 394     {
 395         struct timeval tv;
 396
 397         if (-timeout->QuadPart > (LONGLONG)INT_MAX * TICKSPERSEC)
 398             when->sec = when->usec = INT_MAX;
 399         else
 400         {
 401             ULONG sec = RtlEnlargedUnsignedDivide( -timeout->QuadPart, TICKSPERSEC, &remainder );
 402             gettimeofday( &tv, 0 );
 403             when->sec = tv.tv_sec + sec;
 404             if ((when->usec = tv.tv_usec + (remainder / 10)) >= 1000000)
 405             {
 406                 when->usec -= 1000000;
 407                 when->sec++;
 408             }
 409             if (when->sec < tv.tv_sec)  /* overflow */
 410                 when->sec = when->usec = INT_MAX;
 411         }
 412     }
 413     else  /* absolute time */
 414     {
 415         if (timeout->QuadPart < TICKS_1601_TO_1970)
 416             when->sec = when->usec = 0;
 417         else if (timeout->QuadPart > TICKS_1601_TO_UNIX_MAX)
 418             when->sec = when->usec = INT_MAX;
 419         else
 420         {
 421             when->sec = RtlEnlargedUnsignedDivide( timeout->QuadPart - TICKS_1601_TO_1970,
 422                                                    TICKSPERSEC, &remainder );
 423             when->usec = remainder / 10;
 424         }
 425     }
 426 }
 427
 428
 429 /***********************************************************************
 430  *              NTDLL_from_server_timeout
 431  *
 432  * Convert a timeval struct from the server into an NTDLL timeout.
 433  */
 434 void NTDLL_from_server_timeout( LARGE_INTEGER *timeout, const abs_time_t *when )
 435 {
 436     timeout->QuadPart = when->sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 437     timeout->QuadPart += when->usec * 10;
 438 }
 439
 440
 441 /******************************************************************************
 442  *       RtlTimeToTimeFields [NTDLL.@]
 443  *
 444  * Convert a time into a TIME_FIELDS structure.
 445  *
 446  * PARAMS
 447  *   liTime     [I] Time to convert.
 448  *   TimeFields [O] Destination for the converted time.
 449  *
 450  * RETURNS
 451  *   Nothing.
 452  */
 453 VOID WINAPI RtlTimeToTimeFields(
 454         const LARGE_INTEGER *liTime,
 455         PTIME_FIELDS TimeFields)
 456 {
 457         int SecondsInDay;
 458         long int cleaps, years, yearday, months;
 459         long int Days;
 460         LONGLONG Time;
 461
 462         /* Extract millisecond from time and convert time into seconds */
 463         TimeFields->Milliseconds =
 464             (CSHORT) (( liTime->QuadPart % TICKSPERSEC) / TICKSPERMSEC);
 465         Time = liTime->QuadPart / TICKSPERSEC;
 466
 467         /* The native version of RtlTimeToTimeFields does not take leap seconds
 468          * into account */
 469
 470         /* Split the time into days and seconds within the day */
 471         Days = Time / SECSPERDAY;
 472         SecondsInDay = Time % SECSPERDAY;
 473
 474         /* compute time of day */
 475         TimeFields->Hour = (CSHORT) (SecondsInDay / SECSPERHOUR);
 476         SecondsInDay = SecondsInDay % SECSPERHOUR;
 477         TimeFields->Minute = (CSHORT) (SecondsInDay / SECSPERMIN);
 478         TimeFields->Second = (CSHORT) (SecondsInDay % SECSPERMIN);
 479
 480         /* compute day of week */
 481         TimeFields->Weekday = (CSHORT) ((EPOCHWEEKDAY + Days) % DAYSPERWEEK);
 482
 483         /* compute year, month and day of month. */
 484         cleaps=( 3 * ((4 * Days + 1227) / DAYSPERQUADRICENTENNIUM) + 3 ) / 4;
 485         Days += 28188 + cleaps;
 486         years = (20 * Days - 2442) / (5 * DAYSPERNORMALQUADRENNIUM);
 487         yearday = Days - (years * DAYSPERNORMALQUADRENNIUM)/4;
 488         months = (64 * yearday) / 1959;
 489         /* the result is based on a year starting on March.
 490          * To convert take 12 from Januari and Februari and
 491          * increase the year by one. */
 492         if( months < 14 ) {
 493             TimeFields->Month = months - 1;
 494             TimeFields->Year = years + 1524;
 495         } else {
 496             TimeFields->Month = months - 13;
 497             TimeFields->Year = years + 1525;
 498         }
 499         /* calculation of day of month is based on the wonderful
 500          * sequence of INT( n * 30.6): it reproduces the
 501          * 31-30-31-30-31-31 month lengths exactly for small n's */
 502         TimeFields->Day = yearday - (1959 * months) / 64 ;
 503         return;
 504 }
 505
 506 /******************************************************************************
 507  *       RtlTimeFieldsToTime [NTDLL.@]
 508  *
 509  * Convert a TIME_FIELDS structure into a time.
 510  *
 511  * PARAMS
 512  *   ftTimeFields [I] TIME_FIELDS structure to convert.
 513  *   Time         [O] Destination for the converted time.
 514  *
 515  * RETURNS
 516  *   Success: TRUE.
 517  *   Failure: FALSE.
 518  */
 519 BOOLEAN WINAPI RtlTimeFieldsToTime(
 520         PTIME_FIELDS tfTimeFields,
 521         PLARGE_INTEGER Time)
 522 {
 523         int month, year, cleaps, day;
 524
 525         /* FIXME: normalize the TIME_FIELDS structure here */
 526         /* No, native just returns 0 (error) if the fields are not */
 527         if( tfTimeFields->Milliseconds< 0 || tfTimeFields->Milliseconds > 999 ||
 528                 tfTimeFields->Second < 0 || tfTimeFields->Second > 59 ||
 529                 tfTimeFields->Minute < 0 || tfTimeFields->Minute > 59 ||
 530                 tfTimeFields->Hour < 0 || tfTimeFields->Hour > 23 ||
 531                 tfTimeFields->Month < 1 || tfTimeFields->Month > 12 ||
 532                 tfTimeFields->Day < 1 ||
 533                 tfTimeFields->Day > MonthLengths
 534                     [ tfTimeFields->Month ==2 || IsLeapYear(tfTimeFields->Year)]
 535                     [ tfTimeFields->Month - 1] ||
 536                 tfTimeFields->Year < 1601 )
 537             return FALSE;
 538
 539         /* now calculate a day count from the date
 540          * First start counting years from March. This way the leap days
 541          * are added at the end of the year, not somewhere in the middle.
 542          * Formula's become so much less complicate that way.
 543          * To convert: add 12 to the month numbers of Jan and Feb, and
 544          * take 1 from the year */
 545         if(tfTimeFields->Month < 3) {
 546             month = tfTimeFields->Month + 13;
 547             year = tfTimeFields->Year - 1;
 548         } else {
 549             month = tfTimeFields->Month + 1;
 550             year = tfTimeFields->Year;
 551         }
 552         cleaps = (3 * (year / 100) + 3) / 4;   /* nr of "century leap years"*/
 553         day =  (36525 * year) / 100 - cleaps + /* year * dayperyr, corrected */
 554                  (1959 * month) / 64 +         /* months * daypermonth */
 555                  tfTimeFields->Day -          /* day of the month */
 556                  584817 ;                      /* zero that on 1601-01-01 */
 557         /* done */
 558
 559         Time->QuadPart = (((((LONGLONG) day * HOURSPERDAY +
 560             tfTimeFields->Hour) * MINSPERHOUR +
 561             tfTimeFields->Minute) * SECSPERMIN +
 562             tfTimeFields->Second ) * 1000 +
 563             tfTimeFields->Milliseconds ) * TICKSPERMSEC;
 564
 565         return TRUE;
 566 }
 567
 568 /***********************************************************************
 569  *       TIME_GetBias [internal]
 570  *
 571  * Helper function calculates delta local time from UTC.
 572  *
 573  * PARAMS
 574  *   utc [I] The current utc time.
 575  *   pdaylight [I] Local daylight.
 576  *
 577  * RETURNS
 578  *   The bias for the current timezone.
 579  */
 580 static int TIME_GetBias(time_t utc, int *pdaylight)
 581 {
 582     struct tm *ptm;
 583     static time_t last_utc;
 584     static int last_bias;
 585     static int last_daylight;
 586     int ret;
 587
 588     RtlEnterCriticalSection( &TIME_GetBias_section );
 589     if(utc == last_utc)
 590     {
 591         *pdaylight = last_daylight;
 592         ret = last_bias;
 593     } else
 594     {
 595         ptm = localtime(&utc);
 596         *pdaylight = last_daylight =
 597             ptm->tm_isdst; /* daylight for local timezone */
 598         ptm = gmtime(&utc);
 599         ptm->tm_isdst = *pdaylight; /* use local daylight, not that of Greenwich */
 600         last_utc = utc;
 601         ret = last_bias = (int)(utc-mktime(ptm));
 602     }
 603     RtlLeaveCriticalSection( &TIME_GetBias_section );
 604     return ret;
 605 }
 606
 607 /******************************************************************************
 608  *        RtlLocalTimeToSystemTime [NTDLL.@]
 609  *
 610  * Convert a local time into system time.
 611  *
 612  * PARAMS
 613  *   LocalTime  [I] Local time to convert.
 614  *   SystemTime [O] Destination for the converted time.
 615  *
 616  * RETURNS
 617  *   Success: STATUS_SUCCESS.
 618  *   Failure: An NTSTATUS error code indicating the problem.
 619  */
 620 NTSTATUS WINAPI RtlLocalTimeToSystemTime( const LARGE_INTEGER *LocalTime,
 621                                           PLARGE_INTEGER SystemTime)
 622 {
 623     time_t gmt;
 624     int bias, daylight;
 625
 626     TRACE("(%p, %p)\n", LocalTime, SystemTime);
 627
 628     gmt = time(NULL);
 629     bias = TIME_GetBias(gmt, &daylight);
 630
 631     SystemTime->QuadPart = LocalTime->QuadPart - bias * (LONGLONG)TICKSPERSEC;
 632     return STATUS_SUCCESS;
 633 }
 634
 635 /******************************************************************************
 636  *       RtlSystemTimeToLocalTime [NTDLL.@]
 637  *
 638  * Convert a system time into a local time.
 639  *
 640  * PARAMS
 641  *   SystemTime [I] System time to convert.
 642  *   LocalTime  [O] Destination for the converted time.
 643  *
 644  * RETURNS
 645  *   Success: STATUS_SUCCESS.
 646  *   Failure: An NTSTATUS error code indicating the problem.
 647  */
 648 NTSTATUS WINAPI RtlSystemTimeToLocalTime( const LARGE_INTEGER *SystemTime,
 649                                           PLARGE_INTEGER LocalTime )
 650 {
 651     time_t gmt;
 652     int bias, daylight;
 653
 654     TRACE("(%p, %p)\n", SystemTime, LocalTime);
 655
 656     gmt = time(NULL);
 657     bias = TIME_GetBias(gmt, &daylight);
 658
 659     LocalTime->QuadPart = SystemTime->QuadPart + bias * (LONGLONG)TICKSPERSEC;
 660     return STATUS_SUCCESS;
 661 }
 662
 663 /******************************************************************************
 664  *       RtlTimeToSecondsSince1970 [NTDLL.@]
 665  *
 666  * Convert a time into a count of seconds since 1970.
 667  *
 668  * PARAMS
 669  *   Time    [I] Time to convert.
 670  *   Seconds [O] Destination for the converted time.
 671  *
 672  * RETURNS
 673  *   Success: TRUE.
 674  *   Failure: FALSE, if the resulting value will not fit in a DWORD.
 675  */
 676 BOOLEAN WINAPI RtlTimeToSecondsSince1970( const LARGE_INTEGER *Time, LPDWORD Seconds )
 677 {
 678     ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart;
 679     tmp = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
 680     tmp -= SECS_1601_TO_1970;
 681     if (tmp > 0xffffffff) return FALSE;
 682     *Seconds = (DWORD)tmp;
 683     return TRUE;
 684 }
 685
 686 /******************************************************************************
 687  *       RtlTimeToSecondsSince1980 [NTDLL.@]
 688  *
 689  * Convert a time into a count of seconds since 1980.
 690  *
 691  * PARAMS
 692  *   Time    [I] Time to convert.
 693  *   Seconds [O] Destination for the converted time.
 694  *
 695  * RETURNS
 696  *   Success: TRUE.
 697  *   Failure: FALSE, if the resulting value will not fit in a DWORD.
 698  */
 699 BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *Time, LPDWORD Seconds )
 700 {
 701     ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart;
 702     tmp = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
 703     tmp -= SECS_1601_TO_1980;
 704     if (tmp > 0xffffffff) return FALSE;
 705     *Seconds = (DWORD)tmp;
 706     return TRUE;
 707 }
 708
 709 /******************************************************************************
 710  *       RtlSecondsSince1970ToTime [NTDLL.@]
 711  *
 712  * Convert a count of seconds since 1970 to a time.
 713  *
 714  * PARAMS
 715  *   Seconds [I] Time to convert.
 716  *   Time    [O] Destination for the converted time.
 717  *
 718  * RETURNS
 719  *   Nothing.
 720  */
 721 void WINAPI RtlSecondsSince1970ToTime( DWORD Seconds, LARGE_INTEGER *Time )
 722 {
 723     ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 724     Time->u.LowPart  = (DWORD)secs;
 725     Time->u.HighPart = (DWORD)(secs >> 32);
 726 }
 727
 728 /******************************************************************************
 729  *       RtlSecondsSince1980ToTime [NTDLL.@]
 730  *
 731  * Convert a count of seconds since 1980 to a time.
 732  *
 733  * PARAMS
 734  *   Seconds [I] Time to convert.
 735  *   Time    [O] Destination for the converted time.
 736  *
 737  * RETURNS
 738  *   Nothing.
 739  */
 740 void WINAPI RtlSecondsSince1980ToTime( DWORD Seconds, LARGE_INTEGER *Time )
 741 {
 742     ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1980;
 743     Time->u.LowPart  = (DWORD)secs;
 744     Time->u.HighPart = (DWORD)(secs >> 32);
 745 }
 746
 747 /******************************************************************************
 748  *       RtlTimeToElapsedTimeFields [NTDLL.@]
 749  *
 750  * Convert a time to a count of elapsed seconds.
 751  *
 752  * PARAMS
 753  *   Time       [I] Time to convert.
 754  *   TimeFields [O] Destination for the converted time.
 755  *
 756  * RETURNS
 757  *   Nothing.
 758  */
 759 void WINAPI RtlTimeToElapsedTimeFields( const LARGE_INTEGER *Time, PTIME_FIELDS TimeFields )
 760 {
 761     LONGLONG time;
 762     UINT rem;
 763
 764     time = RtlExtendedLargeIntegerDivide( Time->QuadPart, TICKSPERSEC, &rem );
 765     TimeFields->Milliseconds = rem / TICKSPERMSEC;
 766
 767     /* time is now in seconds */
 768     TimeFields->Year  = 0;
 769     TimeFields->Month = 0;
 770     TimeFields->Day   = RtlExtendedLargeIntegerDivide( time, SECSPERDAY, &rem );
 771
 772     /* rem is now the remaining seconds in the last day */
 773     TimeFields->Second = rem % 60;
 774     rem /= 60;
 775     TimeFields->Minute = rem % 60;
 776     TimeFields->Hour = rem / 60;
 777 }
 778
 779 /***********************************************************************
 780  *       NtQuerySystemTime [NTDLL.@]
 781  *       ZwQuerySystemTime [NTDLL.@]
 782  *
 783  * Get the current system time.
 784  *
 785  * PARAMS
 786  *   Time [O] Destination for the current system time.
 787  *
 788  * RETURNS
 789  *   Success: STATUS_SUCCESS.
 790  *   Failure: An NTSTATUS error code indicating the problem.
 791  */
 792 NTSTATUS WINAPI NtQuerySystemTime( PLARGE_INTEGER Time )
 793 {
 794     struct timeval now;
 795
 796     gettimeofday( &now, 0 );
 797     Time->QuadPart = now.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 798     Time->QuadPart += now.tv_usec * 10;
 799     return STATUS_SUCCESS;
 800 }
 801
 802 /***********************************************************************
 803  *        TIME_GetTZAsStr [internal]
 804  *
 805  * Helper function that returns the given timezone as a string.
 806  *
 807  * PARAMS
 808  *   utc [I] The current utc time.
 809  *   bias [I] The bias of the current timezone.
 810  *   dst [I] ??
 811  *
 812  * RETURNS
 813  *   Timezone name.
 814  *
 815  * NOTES:
 816  *   This could be done with a hash table instead of merely iterating through a
 817  *   table, however with the small amount of entries (60 or so) I didn't think
 818  *   it was worth it.
 819  */
 820 static const WCHAR* TIME_GetTZAsStr (time_t utc, int bias, int dst)
 821 {
 822    char psTZName[7];
 823    struct tm *ptm = localtime(&utc);
 824    unsigned int i;
 825
 826    if (!strftime (psTZName, 7, "%Z", ptm))
 827       return (NULL);
 828
 829    for (i=0; i<(sizeof(TZ_INFO) / sizeof(struct tagTZ_INFO)); i++)
 830    {
 831       if ( strcmp(TZ_INFO[i].psTZFromUnix, psTZName) == 0 &&
 832            TZ_INFO[i].bias == bias &&
 833            TZ_INFO[i].dst == dst
 834          )
 835             return TZ_INFO[i].psTZWindows;
 836    }
 837    FIXME("Can't match system time zone name \"%s\", bias=%d and dst=%d "
 838          "to an entry in TZ_INFO. Please add appropriate entry to "
 839          "TZ_INFO and submit as patch to wine-patches\n",psTZName,bias,dst);
 840    return NULL;
 841 }
 842
 843 /***  TIME_GetTimeZoneInfoFromReg: helper for GetTimeZoneInformation ***/
 844
 845
 846 static int TIME_GetTimeZoneInfoFromReg(LPTIME_ZONE_INFORMATION tzinfo)
 847 {
 848     BYTE buf[90];
 849     KEY_VALUE_PARTIAL_INFORMATION * KpInfo =
 850         (KEY_VALUE_PARTIAL_INFORMATION *) buf;
 851     HKEY hkey;
 852     DWORD size;
 853     OBJECT_ATTRIBUTES attr;
 854     UNICODE_STRING nameW;
 855
 856     attr.Length = sizeof(attr);
 857     attr.RootDirectory = 0;
 858     attr.ObjectName = &nameW;
 859     attr.Attributes = 0;
 860     attr.SecurityDescriptor = NULL;
 861     attr.SecurityQualityOfService = NULL;
 862     RtlInitUnicodeString( &nameW, TZInformationKeyW);
 863     if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) {
 864
 865 #define GTZIFR_N( valkey, tofield) \
 866         RtlInitUnicodeString( &nameW, valkey );\
 867         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
 868                     sizeof(buf), &size )) { \
 869             if( size >= (sizeof((tofield)) + \
 870                     offsetof(KEY_VALUE_PARTIAL_INFORMATION,Data))); { \
 871                 memcpy(&(tofield), \
 872                         KpInfo->Data, sizeof(tofield)); \
 873             } \
 874         }
 875 #define GTZIFR_S( valkey, tofield) \
 876         RtlInitUnicodeString( &nameW, valkey );\
 877         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
 878                     sizeof(buf), &size )) { \
 879             size_t len = (strlenW( (WCHAR*)KpInfo->Data ) + 1) * sizeof(WCHAR); \
 880             if (len > sizeof(tofield)) len = sizeof(tofield); \
 881             memcpy( tofield, KpInfo->Data, len ); \
 882             tofield[(len/sizeof(WCHAR))-1] = 0; \
 883         }
 884
 885         GTZIFR_N( TZStandardStartW,  tzinfo->StandardDate)
 886         GTZIFR_N( TZDaylightStartW,  tzinfo->DaylightDate)
 887         GTZIFR_N( TZBiasW,          tzinfo->Bias)
 888         GTZIFR_N( TZStandardBiasW,  tzinfo->StandardBias)
 889         GTZIFR_N( TZDaylightBiasW,  tzinfo->DaylightBias)
 890         GTZIFR_S( TZStandardNameW, tzinfo->StandardName)
 891         GTZIFR_S( TZDaylightNameW, tzinfo->DaylightName)
 892
 893 #undef GTZIFR_N
 894 #undef GTZIFR_S
 895         NtClose( hkey );
 896         return 1;
 897     }
 898     return 0;
 899 }
 900
 901 /***********************************************************************
 902  *      RtlQueryTimeZoneInformation [NTDLL.@]
 903  *
 904  * Get information about the current timezone.
 905  *
 906  * PARAMS
 907  *   tzinfo [O] Destination for the retrieved timezone info.
 908  *
 909  * RETURNS
 910  *   Success: STATUS_SUCCESS.
 911  *   Failure: An NTSTATUS error code indicating the problem.
 912  */
 913 NTSTATUS WINAPI RtlQueryTimeZoneInformation(LPTIME_ZONE_INFORMATION tzinfo)
 914 {
 915     time_t gmt;
 916     int bias, daylight;
 917     const WCHAR *psTZ;
 918
 919     memset(tzinfo, 0, sizeof(TIME_ZONE_INFORMATION));
 920
 921     if( !TIME_GetTimeZoneInfoFromReg(tzinfo)) {
 922
 923         gmt = time(NULL);
 924         bias = TIME_GetBias(gmt, &daylight);
 925
 926         tzinfo->Bias = -bias / 60;
 927         tzinfo->StandardBias = 0;
 928         tzinfo->DaylightBias = -60;
 929         tzinfo->StandardName[0]='\0';
 930         tzinfo->DaylightName[0]='\0';
 931         psTZ = TIME_GetTZAsStr (gmt, (-bias/60), daylight);
 932         if (psTZ) strcpyW( tzinfo->StandardName, psTZ );
 933         }
 934     return STATUS_SUCCESS;
 935 }
 936
 937 /***********************************************************************
 938  *       RtlSetTimeZoneInformation [NTDLL.@]
 939  *
 940  * Set the current time zone information.
 941  *
 942  * PARAMS
 943  *   tzinfo [I] Timezone information to set.
 944  *
 945  * RETURNS
 946  *   Success: STATUS_SUCCESS.
 947  *   Failure: An NTSTATUS error code indicating the problem.
 948  *
 949  * BUGS
 950  *   Uses the obsolete unix timezone structure and tz_dsttime member.
 951  */
 952 NTSTATUS WINAPI RtlSetTimeZoneInformation( const TIME_ZONE_INFORMATION *tzinfo )
 953 {
 954 #ifdef HAVE_SETTIMEOFDAY
 955     struct timezone tz;
 956
 957     tz.tz_minuteswest = tzinfo->Bias;
 958 #ifdef DST_NONE
 959     tz.tz_dsttime = DST_NONE;
 960 #else
 961     tz.tz_dsttime = 0;
 962 #endif
 963     if(!settimeofday(NULL, &tz))
 964         return STATUS_SUCCESS;
 965 #endif
 966     return STATUS_PRIVILEGE_NOT_HELD;
 967 }
 968
 969 /***********************************************************************
 970  *        NtSetSystemTime [NTDLL.@]
 971  *        ZwSetSystemTime [NTDLL.@]
 972  *
 973  * Set the system time.
 974  *
 975  * PARAMS
 976  *   NewTime [I] The time to set.
 977  *   OldTime [O] Optional destination for the previous system time.
 978  *
 979  * RETURNS
 980  *   Success: STATUS_SUCCESS.
 981  *   Failure: An NTSTATUS error code indicating the problem.
 982  */
 983 NTSTATUS WINAPI NtSetSystemTime(const LARGE_INTEGER *NewTime, LARGE_INTEGER *OldTime)
 984 {
 985     TIME_FIELDS tf;
 986     struct timeval tv;
 987     struct timezone tz;
 988     struct tm t;
 989     time_t sec, oldsec;
 990     int dst, bias;
 991     int err;
 992
 993     /* Return the old time if necessary */
 994     if(OldTime)
 995         NtQuerySystemTime(OldTime);
 996
 997     RtlTimeToTimeFields(NewTime, &tf);
 998
 999     /* call gettimeofday to get the current timezone */
1000     gettimeofday(&tv, &tz);
1001     oldsec = tv.tv_sec;
1002     /* get delta local time from utc */
1003     bias = TIME_GetBias(oldsec, &dst);
1004
1005     /* get the number of seconds */
1006     t.tm_sec = tf.Second;
1007     t.tm_min = tf.Minute;
1008     t.tm_hour = tf.Hour;
1009     t.tm_mday = tf.Day;
1010     t.tm_mon = tf.Month - 1;
1011     t.tm_year = tf.Year - 1900;
1012     t.tm_isdst = dst;
1013     sec = mktime (&t);
1014     /* correct for timezone and daylight */
1015     sec += bias;
1016
1017     /* set the new time */
1018     tv.tv_sec = sec;
1019     tv.tv_usec = tf.Milliseconds * 1000;
1020
1021     /* error and sanity check*/
1022     if(sec == (time_t)-1 || abs((int)(sec-oldsec)) > SETTIME_MAX_ADJUST) {
1023         err = 2;
1024     } else {
1025 #ifdef HAVE_SETTIMEOFDAY
1026         err = settimeofday(&tv, NULL); /* 0 is OK, -1 is error */
1027         if(err == 0)
1028             return STATUS_SUCCESS;
1029 #else
1030         err = 1;
1031 #endif
1032     }
1033
1034     ERR("Cannot set time to %d/%d/%d %d:%d:%d Time adjustment %ld %s\n",
1035             tf.Year, tf.Month, tf.Day, tf.Hour, tf.Minute, tf.Second,
1036             (long)(sec-oldsec),
1037             err == -1 ? "No Permission"
1038                       : sec == (time_t)-1 ? "" : "is too large." );
1039
1040     if(err == 2)
1041         return STATUS_INVALID_PARAMETER;
1042     else if(err == -1)
1043         return STATUS_PRIVILEGE_NOT_HELD;
1044     else
1045         return STATUS_NOT_IMPLEMENTED;
1046 }