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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 "ntstatus.h"
  43 #define WIN32_NO_STATUS
  44 #include "windef.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 RTL_CRITICAL_SECTION TIME_GetBias_section;
  53 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
  54 {
  55     0, 0, &TIME_GetBias_section,
  56     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  57       0, 0, { (DWORD_PTR)(__FILE__ ": TIME_GetBias_section") }
  58 };
  59 static RTL_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    {"AKST",
 106     {'A','l','a','s','k','a','n',' ','S','t','a','n','d','a','r','d',' ',
 107      'T','i','m','e',0}, 540, 0 },
 108    {"AKDT",
 109     {'A','l','a','s','k','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 110      'i','m','e','\0'}, 480, 1},
 111    {"PST",
 112     {'P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r','d',' ','T',
 113      'i','m','e','\0'}, 480, 0},
 114    {"PDT",
 115     {'P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r','d',' ','T',
 116      'i','m','e','\0'}, 420, 1},
 117    {"MST",
 118     {'U','S',' ','M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a',
 119      'r','d',' ','T','i','m','e','\0'}, 420, 0},
 120    {"MDT",
 121     {'M','o','u','n','t','a','i','n',' ','S','t','a','n','d','a','r','d',' ',
 122      'T','i','m','e','\0'}, 360, 1},
 123    {"CST",
 124     {'C','e','n','t','r','a','l',' ','A','m','e','r','i','c','a',' ','S','t',
 125      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, 360, 0},
 126    {"CDT",
 127     {'C','e','n','t','r','a','l',' ','S','t','a','n','d','a','r','d',' ','T',
 128      'i','m','e','\0'}, 300, 1},
 129    {"COT",
 130     {'S','A',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r',
 131      'd',' ','T','i','m','e','\0'}, 300, 0},
 132    {"PET",
 133     {'S','A',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d','a','r',
 134      'd',' ','T','i','m','e',0}, 300, 0 },
 135    {"EDT",
 136     {'E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r','d',' ','T',
 137      'i','m','e','\0'}, 240, 1},
 138    {"EST",
 139     {'U','S',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 140      'd',' ','T','i','m','e','\0'}, 300, 0},
 141    {"ECT",
 142     {'E','a','s','t','e','r','n',' ','C','e','n','t','r','a','l',' ','S','t','a','n','d','a','r',
 143      'd',' ','T','i','m','e','\0'}, 300, 0},
 144    {"ADT",
 145     {'A','t','l','a','n','t','i','c',' ','S','t','a','n','d','a','r','d',' ',
 146      'T','i','m','e','\0'}, 180, 1},
 147    {"VET",
 148     {'S','A',' ','W','e','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 149      'd',' ','T','i','m','e','\0'}, 240, 0},
 150    {"CLT",
 151     {'P','a','c','i','f','i','c',' ','S','A',' ','S','t','a','n','d','a','r',
 152      'd',' ','T','i','m','e','\0'}, 240, 0},
 153    {"CLST",
 154     {'P','a','c','i','f','i','c',' ','S','A',' ','S','t','a','n','d','a','r',
 155      'd',' ','T','i','m','e',0}, 180, 1},
 156    {"AST",
 157     {'A','t','l','a','n','t','i','c',' ','S','t','a','n','d','a','r','d',' ',
 158      'T','i','m','e',0}, 240, 0 },
 159    {"NDT",
 160     {'N','e','w','f','o','u','n','d','l','a','n','d',' ','S','t','a','n','d',
 161      'a','r','d',' ','T','i','m','e','\0'}, 150, 1},
 162    {"NST",
 163     {'N','e','w','f','o','u','n','d','l','a','n','d',' ','S','t','a','n','d',
 164      'a','r','d',' ','T','i','m','e',0}, 210, 0 },
 165    {"BRT",
 166     {'B','r','a','z','i','l','i','a','n',' ','S','t','a','n','d','a','r','d',
 167      ' ','T','i','m','e','\0'}, 180, 0},
 168    {"BRST",
 169     {'B','r','a','z','i','l','i','a','n',' ','S','u','m','m','e','r',
 170      ' ','T','i','m','e','\0'}, 120, 1},
 171    {"ART",
 172     {'S','A',' ','E','a','s','t','e','r','n',' ','S','t','a','n','d','a','r',
 173      'd',' ','T','i','m','e','\0'}, 180, 0},
 174    {"WGST",
 175     {'G','r','e','e','n','l','a','n','d',' ','S','t','a','n','d','a','r','d',
 176      ' ','T','i','m','e','\0'}, 120, 1},
 177    {"GST",
 178     {'M','i','d','-','A','t','l','a','n','t','i','c',' ','S','t','a','n','d',
 179      'a','r','d',' ','T','i','m','e','\0'}, 120, 0},
 180    {"AZOT",
 181     {'A','z','o','r','e','s',' ','S','t','a','n','d','a','r','d',' ','T','i',
 182      'm','e',0}, 60, 0},
 183    {"AZOST",
 184     {'A','z','o','r','e','s',' ','S','t','a','n','d','a','r','d',' ','T','i',
 185      'm','e','\0'}, 0, 1},
 186    {"CVT",
 187     {'C','a','p','e',' ','V','e','r','d','e',' ','S','t','a','n','d','a','r',
 188      'd',' ','T','i','m','e','\0'}, 60, 0},
 189    {"WEST",
 190     {'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},
 191    {"WET",
 192     {'G','r','e','e','n','w','i','c','h',' ','S','t','a','n','d','a','r','d',
 193      ' ','T','i','m','e','\0'}, 0, 0},
 194    {"BST",
 195     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 196     -60, 1},
 197    {"IST",
 198     {'I','r','i','s','h',' ','S','u','m','m','e','r',' ','T','i','m','e','\0'},
 199     -60, 1},
 200    {"GMT",
 201     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 202     0, 0},
 203    {"UTC",
 204     {'G','M','T',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'},
 205     0, 0},
 206    {"CET",
 207     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e','a','n',' ',
 208      'T','i','m','e','\0'}, -60, 0},
 209    {"CEST",
 210     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','S','t','a',
 211      'n','d','a','r','d',' ','T','i','m','e','\0'}, -120, 1},
 212    {"MET",
 213     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','S','t','a',
 214      'n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 0},
 215    {"MEST",
 216     {'C','e','n','t','r','a','l',' ','E','u','r','o','p','e',' ','D','a','y',
 217      'l','i','g','h','t',' ','T','i','m','e','\0'}, -120, 1},
 218    {"WAT",
 219     {'W','.',' ','C','e','n','t','r','a','l',' ','A','f','r','i','c','a',' ',
 220      'S','t','a','n','d','a','r','d',' ','T','i','m','e','\0'}, -60, 0},
 221    {"EEST",
 222     {'E','.',' ','E','u','r','o','p','e',' ','S','t','a','n','d','a','r','d',
 223      ' ','T','i','m','e','\0'}, -180, 1},
 224    {"EET",
 225     {'E','g','y','p','t',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 226      'e','\0'}, -120, 0},
 227    {"CAT",
 228     {'C','e','n','t','r','a','l',' ','A','f','r','i','c','a','n',' '
 229     ,'T','i','m','e','\0'}, -120, 0},
 230    {"SAST",
 231     {'S','o','u','t','h',' ','A','f','r','i','c','a',' ','S','t','a','n','d',
 232      'a','r','d',' ','T','i','m','e','\0'}, -120, 0},
 233    {"IST",
 234     {'I','s','r','a','e','l',' ','S','t','a','n','d','a','r','d',' ','T','i',
 235      'm','e','\0'}, -120, 0},
 236    {"MSK",
 237     {'R','u','s','s','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 238      'i','m','e','\0'}, -180, 0},
 239    {"ADT",
 240     {'A','r','a','b','i','c',' ','S','t','a','n','d','a','r','d',' ','T','i',
 241      'm','e','\0'}, -240, 1},
 242    {"AST",
 243     {'A','r','a','b',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 244      '\0'}, -180, 0},
 245    {"MSD",
 246     {'R','u','s','s','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 247      'i','m','e','\0'}, -240, 1},
 248    {"EAT",
 249     {'E','.',' ','A','f','r','i','c','a',' ','S','t','a','n','d','a','r','d',
 250      ' ','T','i','m','e','\0'}, -180, 0},
 251    {"IRST",
 252     {'I','r','a','n',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 253      0},-210, 0 },
 254    {"IRST",
 255     {'I','r','a','n',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 256      '\0'}, -270, 1},
 257    {"GST",
 258     {'A','r','a','b','i','a','n',' ','S','t','a','n','d','a','r','d',' ','T',
 259      'i','m','e','\0'}, -240, 0},
 260    {"AZT",
 261     {'C','a','u','c','a','s','u','s',' ','S','t','a','n','d','a','r','d',' ',
 262      'T','i','m','e',0}, -240, 0 },
 263    {"AZST",
 264     {'C','a','u','c','a','s','u','s',' ','S','t','a','n','d','a','r','d',' ',
 265      'T','i','m','e','\0'}, -300, 1},
 266    {"AFT",
 267     {'A','f','g','h','a','n','i','s','t','a','n',' ','S','t','a','n','d','a',
 268      'r','d',' ','T','i','m','e','\0'}, -270, 0},
 269    {"SAMT",
 270     {'S','a','m','a','r','a',' ','S','t','a','n','d','a','r','d',' ','T','i',
 271      'm','e','\0'}, -270, 1},
 272    {"YEKT",
 273     {'U','r','a','l','s',' ','S','t','a','n','d','a','r','d',
 274      ' ','T','i','m','e',' ','(','W','i','n','t','e','r',')','\0'}, -300, 0},
 275    {"YEKST",
 276     {'U','r','a','l','s',' ','D','a','y','l','i','g','h','t',
 277      ' ','T','i','m','e',' ','(','S','u','m','m','e','r',')','\0'}, -360, 1},
 278    {"OMST",
 279     {'O','m','s','k',' ','S','t','a','n','d','a','r','d',
 280      ' ','T','i','m','e',' ','(','W','i','n','t','e','r',')','\0'}, -360, 0},
 281    {"OMSST",
 282     {'O','m','s','k',' ','D','a','y','l','i','g','h','t',
 283      ' ','T','i','m','e',' ','(','S','u','m','m','e','r',')','\0'}, -420, 1},
 284    {"PKT",
 285     {'W','e','s','t',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d',
 286      ' ','T','i','m','e','\0'}, -300, 0},
 287    {"IST",
 288     {'I','n','d','i','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 289      'e','\0'}, -330, 0},
 290    {"NPT",
 291     {'N','e','p','a','l',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 292      'e','\0'}, -345, 0},
 293    {"ALMST",
 294     {'N','.',' ','C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t',
 295      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -420, 1},
 296    {"BDT",
 297     {'C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t','a','n','d',
 298      'a','r','d',' ','T','i','m','e','\0'}, -360, 0},
 299    {"LKT",
 300     {'S','r','i',' ','L','a','n','k','a',' ','S','t','a','n','d','a','r','d',
 301      ' ','T','i','m','e','\0'}, -360, 0},
 302    {"MMT",
 303     {'M','y','a','n','m','a','r',' ','S','t','a','n','d','a','r','d',' ','T',
 304      'i','m','e','\0'}, -390, 0},
 305    {"ICT",
 306     {'S','E',' ','A','s','i','a',' ','S','t','a','n','d','a','r','d',' ','T',
 307      'i','m','e','\0'}, -420, 0},
 308    {"KRAT",
 309     {'N','o','r','t','h',' ','A','s','i','a',' ','S','t','a','n','d','a','r',
 310      'd',' ','T','i','m','e',0}, -420, 0},
 311    {"KRAST",
 312     {'N','o','r','t','h',' ','A','s','i','a',' ','S','t','a','n','d','a','r',
 313      'd',' ','T','i','m','e','\0'}, -480, 1},
 314    {"IRKT",
 315     {'N','o','r','t','h',' ','A','s','i','a',' ','E','a','s','t',' ','S','t',
 316      'a','n','d','a','r','d',' ','T','i','m','e',0}, -480, 0},
 317    {"CST",
 318     {'C','h','i','n','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 319      'e','\0'}, -480, 0},
 320    {"IRKST",
 321     {'N','o','r','t','h',' ','A','s','i','a',' ','E','a','s','t',' ','S','t',
 322      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -540, 1},
 323    {"SGT",
 324     {'M','a','l','a','y',' ','P','e','n','i','n','s','u','l','a',' ','S','t',
 325      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -480, 0},
 326    {"WST",
 327     {'W','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 328      'a','r','d',' ','T','i','m','e','\0'}, -480, 0},
 329    {"WST",
 330     {'W','.',' ','A','u','s','t','r','a','l','i','a',' ','S','u','m','m','e',
 331      'r',' ','T','i','m','e','\0'}, -540, 1},
 332    {"JST",
 333     {'T','o','k','y','o',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 334      'e','\0'}, -540, 0},
 335    {"KST",
 336     {'K','o','r','e','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 337      'e','\0'}, -540, 0},
 338    {"YAKST",
 339     {'Y','a','k','u','t','s','k',' ','S','t','a','n','d','a','r','d',' ','T',
 340      'i','m','e','\0'}, -600, 1},
 341    {"CST",
 342     {'C','e','n','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a',
 343      'n','d','a','r','d',' ','T','i','m','e','\0'}, -570, 0},
 344    {"CST",
 345     {'C','e','n','.',' ','A','u','s','t','r','a','l','i','a',' ','D','a','y',
 346      'l','i','g','h','t',' ','T','i','m','e','\0'}, -630, 1},
 347    {"EST",
 348     {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 349      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},
 350    {"EST",
 351     {'E','.',' ','A','u','s','t','r','a','l','i','a',' ','S','t','a','n','d',
 352      'a','r','d',' ','T','i','m','e','\0'}, -660, 1},
 353    {"GST",
 354     {'W','e','s','t',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d',
 355      'a','r','d',' ','T','i','m','e','\0'}, -600, 0},
 356    {"VLAT",
 357     {'V','l','a','d','i','v','o','s','t','o','k',' ','S','t','a','n','d','a',
 358      'r','d',' ','T','i','m','e',0}, -600, 0 },
 359    {"ChST",
 360     {'W','e','s','t',' ','P','a','c','i','f','i','c',' ','S','t','a','n','d',
 361      'a','r','d',' ','T','i','m','e',0}, -600, 0},
 362    {"VLAST",
 363     {'V','l','a','d','i','v','o','s','t','o','k',' ','S','t','a','n','d','a',
 364      'r','d',' ','T','i','m','e','\0'}, -660, 1},
 365    {"MAGT",
 366     {'C','e','n','t','r','a','l',' ','P','a','c','i','f','i','c',' ','S','t',
 367      'a','n','d','a','r','d',' ','T','i','m','e',0}, -660, 0},
 368    {"MAGST",
 369     {'C','e','n','t','r','a','l',' ','P','a','c','i','f','i','c',' ','S','t',
 370      'a','n','d','a','r','d',' ','T','i','m','e','\0'}, -720, 1},
 371    {"NZST",
 372     {'N','e','w',' ','Z','e','a','l','a','n','d',' ','S','t','a','n','d','a',
 373      'r','d',' ','T','i','m','e','\0'}, -720, 0},
 374    {"NZDT",
 375     {'N','e','w',' ','Z','e','a','l','a','n','d',' ','D','a','y','l','i','g',
 376      'h','t',' ','T','i','m','e','\0'}, -780, 1},
 377    {"FJT",
 378     {'F','i','j','i',' ','S','t','a','n','d','a','r','d',' ','T','i','m','e',
 379      '\0'}, -720, 0},
 380    {"TOT",
 381     {'T','o','n','g','a',' ','S','t','a','n','d','a','r','d',' ','T','i','m',
 382      'e','\0'}, -780, 0},
 383    {"NOVT",
 384     {'N','.',' ','C','e','n','t','r','a','l',' ','A','s','i','a',' ','S','t',
 385      'a','n','d','a','r','d',' ','T','i','m','e',0 }, -360, 0},
 386    {"NOVT",
 387     {'N','o','v','o','s','i','b','i','r','s','k',' ','S','t','a','n','d','a',
 388      'r','d',' ','T','i','m','e','\0'}, -360, 1},
 389    {"ANAT",
 390     {'A','n','a','d','y','r',' ','S','t','a','n','d','a','r','d',' ','T','i',
 391      'm','e','\0'}, -720, 1},
 392    {"HKT",
 393     {'H','o','n','g',' ','K','o','n','g',' ','S','t','a','n','d','a','r','d',
 394      ' ','T','i','m','e','\0'}, -480, 0},
 395    {"UYT",
 396     {'U','r','u','g','u','a','y','a','n',' ','T','i','m','e','\0'}, 180, 0},
 397    {"UYST",
 398     {'U','r','u','g','u','a','y','a','n',' ','S','u','m','m','e','r',' ','T',
 399     'i','m','e','\0'}, 120, 1},
 400    {"MYT",
 401     {'M','a','l','a','y','s','i','a','n',' ','T','i','m','e','\0'}, -480, 0},
 402    {"PHT",
 403     {'P','h','i','l','i','p','p','i','n','e',' ','T','i','m','e','\0'}, -480, 0},
 404    {"NOVST",
 405     {'N','o','v','o','s','i','b','i','r','s','k',' ','S','u','m','m','e','r',
 406      ' ','T','i','m','e','\0'}, -480, 1},
 407    {"UZT",
 408     {'U','z','b','e','k','i','s','t','h','a','n',' ','T','i','m','e','\0'}, -300, 0}
 409 };
 410
 411 #define TICKSPERSEC        10000000
 412 #define TICKSPERMSEC       10000
 413 #define SECSPERDAY         86400
 414 #define SECSPERHOUR        3600
 415 #define SECSPERMIN         60
 416 #define MINSPERHOUR        60
 417 #define HOURSPERDAY        24
 418 #define EPOCHWEEKDAY       1  /* Jan 1, 1601 was Monday */
 419 #define DAYSPERWEEK        7
 420 #define EPOCHYEAR          1601
 421 #define DAYSPERNORMALYEAR  365
 422 #define DAYSPERLEAPYEAR    366
 423 #define MONSPERYEAR        12
 424 #define DAYSPERQUADRICENTENNIUM (365 * 400 + 97)
 425 #define DAYSPERNORMALCENTURY (365 * 100 + 24)
 426 #define DAYSPERNORMALQUADRENNIUM (365 * 4 + 1)
 427
 428 /* 1601 to 1970 is 369 years plus 89 leap days */
 429 #define SECS_1601_TO_1970  ((369 * 365 + 89) * (ULONGLONG)SECSPERDAY)
 430 #define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKSPERSEC)
 431 /* 1601 to 1980 is 379 years plus 91 leap days */
 432 #define SECS_1601_TO_1980  ((379 * 365 + 91) * (ULONGLONG)SECSPERDAY)
 433 #define TICKS_1601_TO_1980 (SECS_1601_TO_1980 * TICKSPERSEC)
 434 /* max ticks that can be represented as Unix time */
 435 #define TICKS_1601_TO_UNIX_MAX ((SECS_1601_TO_1970 + INT_MAX) * TICKSPERSEC)
 436
 437
 438 static const int MonthLengths[2][MONSPERYEAR] =
 439 {
 440         { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
 441         { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
 442 };
 443
 444 static inline int IsLeapYear(int Year)
 445 {
 446         return Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) ? 1 : 0;
 447 }
 448
 449 /***********************************************************************
 450  *              NTDLL_get_server_abstime
 451  *
 452  * Convert a NTDLL time into an abs_time_t struct to send to the server.
 453  */
 454 void NTDLL_get_server_abstime( abs_time_t *when, const LARGE_INTEGER *timeout )
 455 {
 456     UINT remainder;
 457
 458     if (!timeout)  /* infinite timeout */
 459     {
 460         when->sec = when->usec = 0;
 461     }
 462     else if (timeout->QuadPart <= 0)  /* relative timeout */
 463     {
 464         struct timeval tv;
 465
 466         if (-timeout->QuadPart > (LONGLONG)INT_MAX * TICKSPERSEC)
 467             when->sec = when->usec = INT_MAX;
 468         else
 469         {
 470             ULONG sec = RtlEnlargedUnsignedDivide( -timeout->QuadPart, TICKSPERSEC, &remainder );
 471             gettimeofday( &tv, 0 );
 472             when->sec = tv.tv_sec + sec;
 473             if ((when->usec = tv.tv_usec + (remainder / 10)) >= 1000000)
 474             {
 475                 when->usec -= 1000000;
 476                 when->sec++;
 477             }
 478             if (when->sec < tv.tv_sec)  /* overflow */
 479                 when->sec = when->usec = INT_MAX;
 480         }
 481     }
 482     else  /* absolute time */
 483     {
 484         if (timeout->QuadPart < TICKS_1601_TO_1970)
 485             when->sec = when->usec = 0;
 486         else if (timeout->QuadPart > TICKS_1601_TO_UNIX_MAX)
 487             when->sec = when->usec = INT_MAX;
 488         else
 489         {
 490             when->sec = RtlEnlargedUnsignedDivide( timeout->QuadPart - TICKS_1601_TO_1970,
 491                                                    TICKSPERSEC, &remainder );
 492             when->usec = remainder / 10;
 493         }
 494     }
 495 }
 496
 497
 498 /***********************************************************************
 499  *              NTDLL_from_server_abstime
 500  *
 501  * Convert a timeval struct from the server into an NTDLL time.
 502  */
 503 void NTDLL_from_server_abstime( LARGE_INTEGER *time, const abs_time_t *when )
 504 {
 505     time->QuadPart = when->sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 506     time->QuadPart += when->usec * 10;
 507 }
 508
 509
 510 /******************************************************************************
 511  *       RtlTimeToTimeFields [NTDLL.@]
 512  *
 513  * Convert a time into a TIME_FIELDS structure.
 514  *
 515  * PARAMS
 516  *   liTime     [I] Time to convert.
 517  *   TimeFields [O] Destination for the converted time.
 518  *
 519  * RETURNS
 520  *   Nothing.
 521  */
 522 VOID WINAPI RtlTimeToTimeFields(
 523         const LARGE_INTEGER *liTime,
 524         PTIME_FIELDS TimeFields)
 525 {
 526         int SecondsInDay;
 527         long int cleaps, years, yearday, months;
 528         long int Days;
 529         LONGLONG Time;
 530
 531         /* Extract millisecond from time and convert time into seconds */
 532         TimeFields->Milliseconds =
 533             (CSHORT) (( liTime->QuadPart % TICKSPERSEC) / TICKSPERMSEC);
 534         Time = liTime->QuadPart / TICKSPERSEC;
 535
 536         /* The native version of RtlTimeToTimeFields does not take leap seconds
 537          * into account */
 538
 539         /* Split the time into days and seconds within the day */
 540         Days = Time / SECSPERDAY;
 541         SecondsInDay = Time % SECSPERDAY;
 542
 543         /* compute time of day */
 544         TimeFields->Hour = (CSHORT) (SecondsInDay / SECSPERHOUR);
 545         SecondsInDay = SecondsInDay % SECSPERHOUR;
 546         TimeFields->Minute = (CSHORT) (SecondsInDay / SECSPERMIN);
 547         TimeFields->Second = (CSHORT) (SecondsInDay % SECSPERMIN);
 548
 549         /* compute day of week */
 550         TimeFields->Weekday = (CSHORT) ((EPOCHWEEKDAY + Days) % DAYSPERWEEK);
 551
 552         /* compute year, month and day of month. */
 553         cleaps=( 3 * ((4 * Days + 1227) / DAYSPERQUADRICENTENNIUM) + 3 ) / 4;
 554         Days += 28188 + cleaps;
 555         years = (20 * Days - 2442) / (5 * DAYSPERNORMALQUADRENNIUM);
 556         yearday = Days - (years * DAYSPERNORMALQUADRENNIUM)/4;
 557         months = (64 * yearday) / 1959;
 558         /* the result is based on a year starting on March.
 559          * To convert take 12 from Januari and Februari and
 560          * increase the year by one. */
 561         if( months < 14 ) {
 562             TimeFields->Month = months - 1;
 563             TimeFields->Year = years + 1524;
 564         } else {
 565             TimeFields->Month = months - 13;
 566             TimeFields->Year = years + 1525;
 567         }
 568         /* calculation of day of month is based on the wonderful
 569          * sequence of INT( n * 30.6): it reproduces the
 570          * 31-30-31-30-31-31 month lengths exactly for small n's */
 571         TimeFields->Day = yearday - (1959 * months) / 64 ;
 572         return;
 573 }
 574
 575 /******************************************************************************
 576  *       RtlTimeFieldsToTime [NTDLL.@]
 577  *
 578  * Convert a TIME_FIELDS structure into a time.
 579  *
 580  * PARAMS
 581  *   ftTimeFields [I] TIME_FIELDS structure to convert.
 582  *   Time         [O] Destination for the converted time.
 583  *
 584  * RETURNS
 585  *   Success: TRUE.
 586  *   Failure: FALSE.
 587  */
 588 BOOLEAN WINAPI RtlTimeFieldsToTime(
 589         PTIME_FIELDS tfTimeFields,
 590         PLARGE_INTEGER Time)
 591 {
 592         int month, year, cleaps, day;
 593
 594         /* FIXME: normalize the TIME_FIELDS structure here */
 595         /* No, native just returns 0 (error) if the fields are not */
 596         if( tfTimeFields->Milliseconds< 0 || tfTimeFields->Milliseconds > 999 ||
 597                 tfTimeFields->Second < 0 || tfTimeFields->Second > 59 ||
 598                 tfTimeFields->Minute < 0 || tfTimeFields->Minute > 59 ||
 599                 tfTimeFields->Hour < 0 || tfTimeFields->Hour > 23 ||
 600                 tfTimeFields->Month < 1 || tfTimeFields->Month > 12 ||
 601                 tfTimeFields->Day < 1 ||
 602                 tfTimeFields->Day > MonthLengths
 603                     [ tfTimeFields->Month ==2 || IsLeapYear(tfTimeFields->Year)]
 604                     [ tfTimeFields->Month - 1] ||
 605                 tfTimeFields->Year < 1601 )
 606             return FALSE;
 607
 608         /* now calculate a day count from the date
 609          * First start counting years from March. This way the leap days
 610          * are added at the end of the year, not somewhere in the middle.
 611          * Formula's become so much less complicate that way.
 612          * To convert: add 12 to the month numbers of Jan and Feb, and
 613          * take 1 from the year */
 614         if(tfTimeFields->Month < 3) {
 615             month = tfTimeFields->Month + 13;
 616             year = tfTimeFields->Year - 1;
 617         } else {
 618             month = tfTimeFields->Month + 1;
 619             year = tfTimeFields->Year;
 620         }
 621         cleaps = (3 * (year / 100) + 3) / 4;   /* nr of "century leap years"*/
 622         day =  (36525 * year) / 100 - cleaps + /* year * dayperyr, corrected */
 623                  (1959 * month) / 64 +         /* months * daypermonth */
 624                  tfTimeFields->Day -          /* day of the month */
 625                  584817 ;                      /* zero that on 1601-01-01 */
 626         /* done */
 627
 628         Time->QuadPart = (((((LONGLONG) day * HOURSPERDAY +
 629             tfTimeFields->Hour) * MINSPERHOUR +
 630             tfTimeFields->Minute) * SECSPERMIN +
 631             tfTimeFields->Second ) * 1000 +
 632             tfTimeFields->Milliseconds ) * TICKSPERMSEC;
 633
 634         return TRUE;
 635 }
 636
 637 /***********************************************************************
 638  *       TIME_GetBias [internal]
 639  *
 640  * Helper function calculates delta local time from UTC.
 641  *
 642  * PARAMS
 643  *   utc [I] The current utc time.
 644  *   pdaylight [I] Local daylight.
 645  *
 646  * RETURNS
 647  *   The bias for the current timezone.
 648  */
 649 static int TIME_GetBias(time_t utc, int *pdaylight)
 650 {
 651     struct tm *ptm;
 652     static time_t last_utc;
 653     static int last_bias;
 654     static int last_daylight;
 655     int ret;
 656
 657     RtlEnterCriticalSection( &TIME_GetBias_section );
 658     if(utc == last_utc)
 659     {
 660         *pdaylight = last_daylight;
 661         ret = last_bias;
 662     } else
 663     {
 664         ptm = localtime(&utc);
 665         *pdaylight = last_daylight =
 666             ptm->tm_isdst; /* daylight for local timezone */
 667         ptm = gmtime(&utc);
 668         ptm->tm_isdst = *pdaylight; /* use local daylight, not that of Greenwich */
 669         last_utc = utc;
 670         ret = last_bias = (int)(utc-mktime(ptm));
 671     }
 672     RtlLeaveCriticalSection( &TIME_GetBias_section );
 673     return ret;
 674 }
 675
 676 /******************************************************************************
 677  *        RtlLocalTimeToSystemTime [NTDLL.@]
 678  *
 679  * Convert a local time into system time.
 680  *
 681  * PARAMS
 682  *   LocalTime  [I] Local time to convert.
 683  *   SystemTime [O] Destination for the converted time.
 684  *
 685  * RETURNS
 686  *   Success: STATUS_SUCCESS.
 687  *   Failure: An NTSTATUS error code indicating the problem.
 688  */
 689 NTSTATUS WINAPI RtlLocalTimeToSystemTime( const LARGE_INTEGER *LocalTime,
 690                                           PLARGE_INTEGER SystemTime)
 691 {
 692     time_t gmt;
 693     int bias, daylight;
 694
 695     TRACE("(%p, %p)\n", LocalTime, SystemTime);
 696
 697     gmt = time(NULL);
 698     bias = TIME_GetBias(gmt, &daylight);
 699
 700     SystemTime->QuadPart = LocalTime->QuadPart - bias * (LONGLONG)TICKSPERSEC;
 701     return STATUS_SUCCESS;
 702 }
 703
 704 /******************************************************************************
 705  *       RtlSystemTimeToLocalTime [NTDLL.@]
 706  *
 707  * Convert a system time into a local time.
 708  *
 709  * PARAMS
 710  *   SystemTime [I] System time to convert.
 711  *   LocalTime  [O] Destination for the converted time.
 712  *
 713  * RETURNS
 714  *   Success: STATUS_SUCCESS.
 715  *   Failure: An NTSTATUS error code indicating the problem.
 716  */
 717 NTSTATUS WINAPI RtlSystemTimeToLocalTime( const LARGE_INTEGER *SystemTime,
 718                                           PLARGE_INTEGER LocalTime )
 719 {
 720     time_t gmt;
 721     int bias, daylight;
 722
 723     TRACE("(%p, %p)\n", SystemTime, LocalTime);
 724
 725     gmt = time(NULL);
 726     bias = TIME_GetBias(gmt, &daylight);
 727
 728     LocalTime->QuadPart = SystemTime->QuadPart + bias * (LONGLONG)TICKSPERSEC;
 729     return STATUS_SUCCESS;
 730 }
 731
 732 /******************************************************************************
 733  *       RtlTimeToSecondsSince1970 [NTDLL.@]
 734  *
 735  * Convert a time into a count of seconds since 1970.
 736  *
 737  * PARAMS
 738  *   Time    [I] Time to convert.
 739  *   Seconds [O] Destination for the converted time.
 740  *
 741  * RETURNS
 742  *   Success: TRUE.
 743  *   Failure: FALSE, if the resulting value will not fit in a DWORD.
 744  */
 745 BOOLEAN WINAPI RtlTimeToSecondsSince1970( const LARGE_INTEGER *Time, LPDWORD Seconds )
 746 {
 747     ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart;
 748     tmp = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
 749     tmp -= SECS_1601_TO_1970;
 750     if (tmp > 0xffffffff) return FALSE;
 751     *Seconds = (DWORD)tmp;
 752     return TRUE;
 753 }
 754
 755 /******************************************************************************
 756  *       RtlTimeToSecondsSince1980 [NTDLL.@]
 757  *
 758  * Convert a time into a count of seconds since 1980.
 759  *
 760  * PARAMS
 761  *   Time    [I] Time to convert.
 762  *   Seconds [O] Destination for the converted time.
 763  *
 764  * RETURNS
 765  *   Success: TRUE.
 766  *   Failure: FALSE, if the resulting value will not fit in a DWORD.
 767  */
 768 BOOLEAN WINAPI RtlTimeToSecondsSince1980( const LARGE_INTEGER *Time, LPDWORD Seconds )
 769 {
 770     ULONGLONG tmp = ((ULONGLONG)Time->u.HighPart << 32) | Time->u.LowPart;
 771     tmp = RtlLargeIntegerDivide( tmp, TICKSPERSEC, NULL );
 772     tmp -= SECS_1601_TO_1980;
 773     if (tmp > 0xffffffff) return FALSE;
 774     *Seconds = (DWORD)tmp;
 775     return TRUE;
 776 }
 777
 778 /******************************************************************************
 779  *       RtlSecondsSince1970ToTime [NTDLL.@]
 780  *
 781  * Convert a count of seconds since 1970 to a time.
 782  *
 783  * PARAMS
 784  *   Seconds [I] Time to convert.
 785  *   Time    [O] Destination for the converted time.
 786  *
 787  * RETURNS
 788  *   Nothing.
 789  */
 790 void WINAPI RtlSecondsSince1970ToTime( DWORD Seconds, LARGE_INTEGER *Time )
 791 {
 792     ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 793     Time->u.LowPart  = (DWORD)secs;
 794     Time->u.HighPart = (DWORD)(secs >> 32);
 795 }
 796
 797 /******************************************************************************
 798  *       RtlSecondsSince1980ToTime [NTDLL.@]
 799  *
 800  * Convert a count of seconds since 1980 to a time.
 801  *
 802  * PARAMS
 803  *   Seconds [I] Time to convert.
 804  *   Time    [O] Destination for the converted time.
 805  *
 806  * RETURNS
 807  *   Nothing.
 808  */
 809 void WINAPI RtlSecondsSince1980ToTime( DWORD Seconds, LARGE_INTEGER *Time )
 810 {
 811     ULONGLONG secs = Seconds * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1980;
 812     Time->u.LowPart  = (DWORD)secs;
 813     Time->u.HighPart = (DWORD)(secs >> 32);
 814 }
 815
 816 /******************************************************************************
 817  *       RtlTimeToElapsedTimeFields [NTDLL.@]
 818  *
 819  * Convert a time to a count of elapsed seconds.
 820  *
 821  * PARAMS
 822  *   Time       [I] Time to convert.
 823  *   TimeFields [O] Destination for the converted time.
 824  *
 825  * RETURNS
 826  *   Nothing.
 827  */
 828 void WINAPI RtlTimeToElapsedTimeFields( const LARGE_INTEGER *Time, PTIME_FIELDS TimeFields )
 829 {
 830     LONGLONG time;
 831     INT rem;
 832
 833     time = RtlExtendedLargeIntegerDivide( Time->QuadPart, TICKSPERSEC, &rem );
 834     TimeFields->Milliseconds = rem / TICKSPERMSEC;
 835
 836     /* time is now in seconds */
 837     TimeFields->Year  = 0;
 838     TimeFields->Month = 0;
 839     TimeFields->Day   = RtlExtendedLargeIntegerDivide( time, SECSPERDAY, &rem );
 840
 841     /* rem is now the remaining seconds in the last day */
 842     TimeFields->Second = rem % 60;
 843     rem /= 60;
 844     TimeFields->Minute = rem % 60;
 845     TimeFields->Hour = rem / 60;
 846 }
 847
 848 /***********************************************************************
 849  *       NtQuerySystemTime [NTDLL.@]
 850  *       ZwQuerySystemTime [NTDLL.@]
 851  *
 852  * Get the current system time.
 853  *
 854  * PARAMS
 855  *   Time [O] Destination for the current system time.
 856  *
 857  * RETURNS
 858  *   Success: STATUS_SUCCESS.
 859  *   Failure: An NTSTATUS error code indicating the problem.
 860  */
 861 NTSTATUS WINAPI NtQuerySystemTime( PLARGE_INTEGER Time )
 862 {
 863     struct timeval now;
 864
 865     gettimeofday( &now, 0 );
 866     Time->QuadPart = now.tv_sec * (ULONGLONG)TICKSPERSEC + TICKS_1601_TO_1970;
 867     Time->QuadPart += now.tv_usec * 10;
 868     return STATUS_SUCCESS;
 869 }
 870
 871 /******************************************************************************
 872  *  NtQueryPerformanceCounter   [NTDLL.@]
 873  *
 874  *  Note: Windows uses a timer clocked at a multiple of 1193182 Hz. There is a
 875  *  good number of applications that crash when the returned frequency is either
 876  *  lower or higher then what Windows gives. Also too high counter values are
 877  *  reported to give problems.
 878  */
 879 NTSTATUS WINAPI NtQueryPerformanceCounter( PLARGE_INTEGER Counter, PLARGE_INTEGER Frequency )
 880 {
 881     struct timeval now;
 882
 883     if (!Counter) return STATUS_ACCESS_VIOLATION;
 884     gettimeofday( &now, 0 );
 885     /* convert a counter that increments at a rate of 1 MHz
 886      * to one of 1.193182 MHz, with some care for arithmetic
 887      * overflow ( will not overflow for 5000 years ) and
 888      * good accuracy ( 105/88 = 1.19318182) */
 889     Counter->QuadPart = (((now.tv_sec - server_start_time.sec) * (ULONGLONG)1000000 +
 890                           (now.tv_usec - server_start_time.usec)) * 105) / 88;
 891     if (Frequency) Frequency->QuadPart = 1193182;
 892     return STATUS_SUCCESS;
 893 }
 894
 895
 896 /******************************************************************************
 897  * NtGetTickCount   (NTDLL.@)
 898  * ZwGetTickCount   (NTDLL.@)
 899  */
 900 ULONG WINAPI NtGetTickCount(void)
 901 {
 902     struct timeval current_time;
 903
 904     gettimeofday(&current_time, NULL);
 905     return (current_time.tv_sec - server_start_time.sec) * 1000 +
 906            (current_time.tv_usec - server_start_time.usec) / 1000;
 907 }
 908
 909
 910 /***********************************************************************
 911  *        TIME_GetTZAsStr [internal]
 912  *
 913  * Helper function that returns the given timezone as a string.
 914  *
 915  * PARAMS
 916  *   utc [I] The current utc time.
 917  *   bias [I] The bias of the current timezone.
 918  *   dst [I] ??
 919  *
 920  * RETURNS
 921  *   Timezone name.
 922  *
 923  * NOTES:
 924  *   This could be done with a hash table instead of merely iterating through a
 925  *   table, however with the small amount of entries (60 or so) I didn't think
 926  *   it was worth it.
 927  */
 928 static const WCHAR* TIME_GetTZAsStr (time_t utc, int bias, int dst)
 929 {
 930    char psTZName[7];
 931    struct tm *ptm = localtime(&utc);
 932    unsigned int i;
 933
 934    if (!strftime (psTZName, 7, "%Z", ptm))
 935       return (NULL);
 936
 937    for (i=0; i<(sizeof(TZ_INFO) / sizeof(struct tagTZ_INFO)); i++)
 938    {
 939       if ( strcmp(TZ_INFO[i].psTZFromUnix, psTZName) == 0 &&
 940            TZ_INFO[i].bias == bias &&
 941            TZ_INFO[i].dst == dst
 942          )
 943             return TZ_INFO[i].psTZWindows;
 944    }
 945    FIXME("Can't match system time zone name \"%s\", bias=%d and dst=%d "
 946          "to an entry in TZ_INFO. Please add appropriate entry to "
 947          "TZ_INFO and submit as patch to wine-patches\n",psTZName,bias,dst);
 948    return NULL;
 949 }
 950
 951 /***  TIME_GetTimeZoneInfoFromReg: helper for GetTimeZoneInformation ***/
 952
 953
 954 static int TIME_GetTimeZoneInfoFromReg(RTL_TIME_ZONE_INFORMATION *tzinfo)
 955 {
 956     BYTE buf[90];
 957     KEY_VALUE_PARTIAL_INFORMATION * KpInfo =
 958         (KEY_VALUE_PARTIAL_INFORMATION *) buf;
 959     HANDLE hkey;
 960     DWORD size;
 961     OBJECT_ATTRIBUTES attr;
 962     UNICODE_STRING nameW;
 963
 964     attr.Length = sizeof(attr);
 965     attr.RootDirectory = 0;
 966     attr.ObjectName = &nameW;
 967     attr.Attributes = 0;
 968     attr.SecurityDescriptor = NULL;
 969     attr.SecurityQualityOfService = NULL;
 970     RtlInitUnicodeString( &nameW, TZInformationKeyW);
 971     if (!NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) {
 972
 973 #define GTZIFR_N( valkey, tofield) \
 974         RtlInitUnicodeString( &nameW, valkey );\
 975         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
 976                     sizeof(buf), &size )) { \
 977             if( size >= (sizeof((tofield)) + \
 978                     offsetof(KEY_VALUE_PARTIAL_INFORMATION,Data))) { \
 979                 memcpy(&(tofield), \
 980                         KpInfo->Data, sizeof(tofield)); \
 981             } \
 982         }
 983 #define GTZIFR_S( valkey, tofield) \
 984         RtlInitUnicodeString( &nameW, valkey );\
 985         if (!NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation, KpInfo,\
 986                     sizeof(buf), &size )) { \
 987             size_t len = (strlenW( (WCHAR*)KpInfo->Data ) + 1) * sizeof(WCHAR); \
 988             if (len > sizeof(tofield)) len = sizeof(tofield); \
 989             memcpy( tofield, KpInfo->Data, len ); \
 990             tofield[(len/sizeof(WCHAR))-1] = 0; \
 991         }
 992
 993         GTZIFR_N( TZStandardStartW,  tzinfo->StandardDate)
 994         GTZIFR_N( TZDaylightStartW,  tzinfo->DaylightDate)
 995         GTZIFR_N( TZBiasW,          tzinfo->Bias)
 996         GTZIFR_N( TZStandardBiasW,  tzinfo->StandardBias)
 997         GTZIFR_N( TZDaylightBiasW,  tzinfo->DaylightBias)
 998         GTZIFR_S( TZStandardNameW, tzinfo->StandardName)
 999         GTZIFR_S( TZDaylightNameW, tzinfo->DaylightName)
1000
1001 #undef GTZIFR_N
1002 #undef GTZIFR_S
1003         NtClose( hkey );
1004         return 1;
1005     }
1006     return 0;
1007 }
1008
1009 /***********************************************************************
1010  *      RtlQueryTimeZoneInformation [NTDLL.@]
1011  *
1012  * Get information about the current timezone.
1013  *
1014  * PARAMS
1015  *   tzinfo [O] Destination for the retrieved timezone info.
1016  *
1017  * RETURNS
1018  *   Success: STATUS_SUCCESS.
1019  *   Failure: An NTSTATUS error code indicating the problem.
1020  */
1021 NTSTATUS WINAPI RtlQueryTimeZoneInformation(RTL_TIME_ZONE_INFORMATION *tzinfo)
1022 {
1023     time_t gmt;
1024     int bias, daylight;
1025     const WCHAR *psTZ;
1026
1027     memset(tzinfo, 0, sizeof(RTL_TIME_ZONE_INFORMATION));
1028
1029     if( !TIME_GetTimeZoneInfoFromReg(tzinfo)) {
1030
1031         gmt = time(NULL);
1032         bias = TIME_GetBias(gmt, &daylight);
1033
1034         tzinfo->Bias = -bias / 60;
1035         tzinfo->StandardBias = 0;
1036         tzinfo->DaylightBias = -60;
1037         tzinfo->StandardName[0]='\0';
1038         tzinfo->DaylightName[0]='\0';
1039         psTZ = TIME_GetTZAsStr (gmt, (-bias/60), daylight);
1040         if (psTZ) strcpyW( tzinfo->StandardName, psTZ );
1041         }
1042     return STATUS_SUCCESS;
1043 }
1044
1045 /***********************************************************************
1046  *       RtlSetTimeZoneInformation [NTDLL.@]
1047  *
1048  * Set the current time zone information.
1049  *
1050  * PARAMS
1051  *   tzinfo [I] Timezone information to set.
1052  *
1053  * RETURNS
1054  *   Success: STATUS_SUCCESS.
1055  *   Failure: An NTSTATUS error code indicating the problem.
1056  *
1057  * BUGS
1058  *   Uses the obsolete unix timezone structure and tz_dsttime member.
1059  */
1060 NTSTATUS WINAPI RtlSetTimeZoneInformation( const RTL_TIME_ZONE_INFORMATION *tzinfo )
1061 {
1062 #ifdef HAVE_SETTIMEOFDAY
1063     struct timezone tz;
1064
1065     tz.tz_minuteswest = tzinfo->Bias;
1066 #ifdef DST_NONE
1067     tz.tz_dsttime = DST_NONE;
1068 #else
1069     tz.tz_dsttime = 0;
1070 #endif
1071     if(!settimeofday(NULL, &tz))
1072         return STATUS_SUCCESS;
1073 #endif
1074     return STATUS_PRIVILEGE_NOT_HELD;
1075 }
1076
1077 /***********************************************************************
1078  *        NtSetSystemTime [NTDLL.@]
1079  *        ZwSetSystemTime [NTDLL.@]
1080  *
1081  * Set the system time.
1082  *
1083  * PARAMS
1084  *   NewTime [I] The time to set.
1085  *   OldTime [O] Optional destination for the previous system time.
1086  *
1087  * RETURNS
1088  *   Success: STATUS_SUCCESS.
1089  *   Failure: An NTSTATUS error code indicating the problem.
1090  */
1091 NTSTATUS WINAPI NtSetSystemTime(const LARGE_INTEGER *NewTime, LARGE_INTEGER *OldTime)
1092 {
1093     TIME_FIELDS tf;
1094     struct timeval tv;
1095     struct timezone tz;
1096     struct tm t;
1097     time_t sec, oldsec;
1098     int dst, bias;
1099     int err;
1100
1101     /* Return the old time if necessary */
1102     if(OldTime)
1103         NtQuerySystemTime(OldTime);
1104
1105     RtlTimeToTimeFields(NewTime, &tf);
1106
1107     /* call gettimeofday to get the current timezone */
1108     gettimeofday(&tv, &tz);
1109     oldsec = tv.tv_sec;
1110     /* get delta local time from utc */
1111     bias = TIME_GetBias(oldsec, &dst);
1112
1113     /* get the number of seconds */
1114     t.tm_sec = tf.Second;
1115     t.tm_min = tf.Minute;
1116     t.tm_hour = tf.Hour;
1117     t.tm_mday = tf.Day;
1118     t.tm_mon = tf.Month - 1;
1119     t.tm_year = tf.Year - 1900;
1120     t.tm_isdst = dst;
1121     sec = mktime (&t);
1122     /* correct for timezone and daylight */
1123     sec += bias;
1124
1125     /* set the new time */
1126     tv.tv_sec = sec;
1127     tv.tv_usec = tf.Milliseconds * 1000;
1128
1129     /* error and sanity check*/
1130     if(sec == (time_t)-1 || abs((int)(sec-oldsec)) > SETTIME_MAX_ADJUST) {
1131         err = 2;
1132     } else {
1133 #ifdef HAVE_SETTIMEOFDAY
1134         err = settimeofday(&tv, NULL); /* 0 is OK, -1 is error */
1135         if(err == 0)
1136             return STATUS_SUCCESS;
1137 #else
1138         err = 1;
1139 #endif
1140     }
1141
1142     ERR("Cannot set time to %d/%d/%d %d:%d:%d Time adjustment %ld %s\n",
1143             tf.Year, tf.Month, tf.Day, tf.Hour, tf.Minute, tf.Second,
1144             (long)(sec-oldsec),
1145             err == -1 ? "No Permission"
1146                       : sec == (time_t)-1 ? "" : "is too large." );
1147
1148     if(err == 2)
1149         return STATUS_INVALID_PARAMETER;
1150     else if(err == -1)
1151         return STATUS_PRIVILEGE_NOT_HELD;
1152     else
1153         return STATUS_NOT_IMPLEMENTED;
1154 }