prtime.cc revision ddb351dbec246cf1fab5ec20d2d5520909041de1
1/* Portions are Copyright (C) 2011 Google Inc */ 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.cc -- 40 * NOTE: The original nspr file name is prtime.c 41 * 42 * NSPR date and time functions 43 * 44 * CVS revision 3.37 45 */ 46 47/* 48 * The following functions were copied from the NSPR prtime.c file. 49 * PR_ParseTimeString 50 * We inlined the new PR_ParseTimeStringToExplodedTime function to avoid 51 * copying PR_ExplodeTime and PR_LocalTimeParameters. (The PR_ExplodeTime 52 * and PR_ImplodeTime calls cancel each other out.) 53 * PR_NormalizeTime 54 * PR_GMTParameters 55 * PR_ImplodeTime 56 * This was modified to use the Win32 SYSTEMTIME/FILETIME structures 57 * and the timezone offsets are applied to the FILETIME structure. 58 * All types and macros are defined in the base/third_party/prtime.h file. 59 * These have been copied from the following nspr files. We have only copied 60 * over the types we need. 61 * 1. prtime.h 62 * 2. prtypes.h 63 * 3. prlong.h 64 */ 65 66#include "base/logging.h" 67#include "base/third_party/nspr/prtime.h" 68#include "build/build_config.h" 69 70#if defined(OS_WIN) 71#include <windows.h> 72#elif defined(OS_MACOSX) 73#include <CoreFoundation/CoreFoundation.h> 74#endif 75#include <errno.h> /* for EINVAL */ 76#include <time.h> 77 78/* Implements the Unix localtime_r() function for windows */ 79#if defined(OS_WIN) 80static void localtime_r(const time_t* secs, struct tm* time) { 81 (void) localtime_s(time, secs); 82} 83#endif 84 85/* 86 *------------------------------------------------------------------------ 87 * 88 * PR_ImplodeTime -- 89 * 90 * Cf. time_t mktime(struct tm *tp) 91 * Note that 1 year has < 2^25 seconds. So an PRInt32 is large enough. 92 * 93 *------------------------------------------------------------------------ 94 */ 95PRTime 96PR_ImplodeTime(const PRExplodedTime *exploded) 97{ 98 // This is important, we want to make sure multiplications are 99 // done with the correct precision. 100 static const PRTime kSecondsToMicroseconds = static_cast<PRTime>(1000000); 101#if defined(OS_WIN) 102 // Create the system struct representing our exploded time. 103 SYSTEMTIME st = {0}; 104 FILETIME ft = {0}; 105 ULARGE_INTEGER uli = {0}; 106 107 st.wYear = exploded->tm_year; 108 st.wMonth = exploded->tm_month + 1; 109 st.wDayOfWeek = exploded->tm_wday; 110 st.wDay = exploded->tm_mday; 111 st.wHour = exploded->tm_hour; 112 st.wMinute = exploded->tm_min; 113 st.wSecond = exploded->tm_sec; 114 st.wMilliseconds = exploded->tm_usec/1000; 115 // Convert to FILETIME. 116 if (!SystemTimeToFileTime(&st, &ft)) { 117 NOTREACHED() << "Unable to convert time"; 118 return 0; 119 } 120 // Apply offsets. 121 uli.LowPart = ft.dwLowDateTime; 122 uli.HighPart = ft.dwHighDateTime; 123 // Convert from Windows epoch to NSPR epoch, and 100-nanoseconds units 124 // to microsecond units. 125 PRTime result = 126 static_cast<PRTime>((uli.QuadPart / 10) - 11644473600000000i64); 127 // Adjust for time zone and dst. Convert from seconds to microseconds. 128 result -= (exploded->tm_params.tp_gmt_offset + 129 exploded->tm_params.tp_dst_offset) * kSecondsToMicroseconds; 130 return result; 131#elif defined(OS_MACOSX) 132 // Create the system struct representing our exploded time. 133 CFGregorianDate gregorian_date; 134 gregorian_date.year = exploded->tm_year; 135 gregorian_date.month = exploded->tm_month + 1; 136 gregorian_date.day = exploded->tm_mday; 137 gregorian_date.hour = exploded->tm_hour; 138 gregorian_date.minute = exploded->tm_min; 139 gregorian_date.second = exploded->tm_sec; 140 141 // Compute |absolute_time| in seconds, correct for gmt and dst 142 // (note the combined offset will be negative when we need to add it), then 143 // convert to microseconds which is what PRTime expects. 144 CFAbsoluteTime absolute_time = 145 CFGregorianDateGetAbsoluteTime(gregorian_date, NULL); 146 PRTime result = static_cast<PRTime>(absolute_time); 147 result -= exploded->tm_params.tp_gmt_offset + 148 exploded->tm_params.tp_dst_offset; 149 result += kCFAbsoluteTimeIntervalSince1970; // PRTime epoch is 1970 150 result *= kSecondsToMicroseconds; 151 result += exploded->tm_usec; 152 return result; 153#elif defined(OS_POSIX) 154 struct tm exp_tm = {0}; 155 exp_tm.tm_sec = exploded->tm_sec; 156 exp_tm.tm_min = exploded->tm_min; 157 exp_tm.tm_hour = exploded->tm_hour; 158 exp_tm.tm_mday = exploded->tm_mday; 159 exp_tm.tm_mon = exploded->tm_month; 160 exp_tm.tm_year = exploded->tm_year - 1900; 161 162 time_t absolute_time = timegm(&exp_tm); 163 164 // If timegm returned -1. Since we don't pass it a time zone, the only 165 // valid case of returning -1 is 1 second before Epoch (Dec 31, 1969). 166 if (absolute_time == -1 && 167 !(exploded->tm_year == 1969 && exploded->tm_month == 11 && 168 exploded->tm_mday == 31 && exploded->tm_hour == 23 && 169 exploded->tm_min == 59 && exploded->tm_sec == 59)) { 170 // If we get here, time_t must be 32 bits. 171 // Date was possibly too far in the future and would overflow. Return 172 // the most future date possible (year 2038). 173 if (exploded->tm_year >= 1970) 174 return INT_MAX * kSecondsToMicroseconds; 175 // Date was possibly too far in the past and would underflow. Return 176 // the most past date possible (year 1901). 177 return INT_MIN * kSecondsToMicroseconds; 178 } 179 180 PRTime result = static_cast<PRTime>(absolute_time); 181 result -= exploded->tm_params.tp_gmt_offset + 182 exploded->tm_params.tp_dst_offset; 183 result *= kSecondsToMicroseconds; 184 result += exploded->tm_usec; 185 return result; 186#else 187#error No PR_ImplodeTime implemented on your platform. 188#endif 189} 190 191/* 192 * The COUNT_LEAPS macro counts the number of leap years passed by 193 * till the start of the given year Y. At the start of the year 4 194 * A.D. the number of leap years passed by is 0, while at the start of 195 * the year 5 A.D. this count is 1. The number of years divisible by 196 * 100 but not divisible by 400 (the non-leap years) is deducted from 197 * the count to get the correct number of leap years. 198 * 199 * The COUNT_DAYS macro counts the number of days since 01/01/01 till the 200 * start of the given year Y. The number of days at the start of the year 201 * 1 is 0 while the number of days at the start of the year 2 is 365 202 * (which is ((2)-1) * 365) and so on. The reference point is 01/01/01 203 * midnight 00:00:00. 204 */ 205 206#define COUNT_LEAPS(Y) ( ((Y)-1)/4 - ((Y)-1)/100 + ((Y)-1)/400 ) 207#define COUNT_DAYS(Y) ( ((Y)-1)*365 + COUNT_LEAPS(Y) ) 208#define DAYS_BETWEEN_YEARS(A, B) (COUNT_DAYS(B) - COUNT_DAYS(A)) 209 210/* 211 * Static variables used by functions in this file 212 */ 213 214/* 215 * The following array contains the day of year for the last day of 216 * each month, where index 1 is January, and day 0 is January 1. 217 */ 218 219static const int lastDayOfMonth[2][13] = { 220 {-1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364}, 221 {-1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365} 222}; 223 224/* 225 * The number of days in a month 226 */ 227 228static const PRInt8 nDays[2][12] = { 229 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, 230 {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} 231}; 232 233/* 234 *------------------------------------------------------------------------- 235 * 236 * IsLeapYear -- 237 * 238 * Returns 1 if the year is a leap year, 0 otherwise. 239 * 240 *------------------------------------------------------------------------- 241 */ 242 243static int IsLeapYear(PRInt16 year) 244{ 245 if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) 246 return 1; 247 else 248 return 0; 249} 250 251/* 252 * 'secOffset' should be less than 86400 (i.e., a day). 253 * 'time' should point to a normalized PRExplodedTime. 254 */ 255 256static void 257ApplySecOffset(PRExplodedTime *time, PRInt32 secOffset) 258{ 259 time->tm_sec += secOffset; 260 261 /* Note that in this implementation we do not count leap seconds */ 262 if (time->tm_sec < 0 || time->tm_sec >= 60) { 263 time->tm_min += time->tm_sec / 60; 264 time->tm_sec %= 60; 265 if (time->tm_sec < 0) { 266 time->tm_sec += 60; 267 time->tm_min--; 268 } 269 } 270 271 if (time->tm_min < 0 || time->tm_min >= 60) { 272 time->tm_hour += time->tm_min / 60; 273 time->tm_min %= 60; 274 if (time->tm_min < 0) { 275 time->tm_min += 60; 276 time->tm_hour--; 277 } 278 } 279 280 if (time->tm_hour < 0) { 281 /* Decrement mday, yday, and wday */ 282 time->tm_hour += 24; 283 time->tm_mday--; 284 time->tm_yday--; 285 if (time->tm_mday < 1) { 286 time->tm_month--; 287 if (time->tm_month < 0) { 288 time->tm_month = 11; 289 time->tm_year--; 290 if (IsLeapYear(time->tm_year)) 291 time->tm_yday = 365; 292 else 293 time->tm_yday = 364; 294 } 295 time->tm_mday = nDays[IsLeapYear(time->tm_year)][time->tm_month]; 296 } 297 time->tm_wday--; 298 if (time->tm_wday < 0) 299 time->tm_wday = 6; 300 } else if (time->tm_hour > 23) { 301 /* Increment mday, yday, and wday */ 302 time->tm_hour -= 24; 303 time->tm_mday++; 304 time->tm_yday++; 305 if (time->tm_mday > 306 nDays[IsLeapYear(time->tm_year)][time->tm_month]) { 307 time->tm_mday = 1; 308 time->tm_month++; 309 if (time->tm_month > 11) { 310 time->tm_month = 0; 311 time->tm_year++; 312 time->tm_yday = 0; 313 } 314 } 315 time->tm_wday++; 316 if (time->tm_wday > 6) 317 time->tm_wday = 0; 318 } 319} 320 321void 322PR_NormalizeTime(PRExplodedTime *time, PRTimeParamFn params) 323{ 324 int daysInMonth; 325 PRInt32 numDays; 326 327 /* Get back to GMT */ 328 time->tm_sec -= time->tm_params.tp_gmt_offset 329 + time->tm_params.tp_dst_offset; 330 time->tm_params.tp_gmt_offset = 0; 331 time->tm_params.tp_dst_offset = 0; 332 333 /* Now normalize GMT */ 334 335 if (time->tm_usec < 0 || time->tm_usec >= 1000000) { 336 time->tm_sec += time->tm_usec / 1000000; 337 time->tm_usec %= 1000000; 338 if (time->tm_usec < 0) { 339 time->tm_usec += 1000000; 340 time->tm_sec--; 341 } 342 } 343 344 /* Note that we do not count leap seconds in this implementation */ 345 if (time->tm_sec < 0 || time->tm_sec >= 60) { 346 time->tm_min += time->tm_sec / 60; 347 time->tm_sec %= 60; 348 if (time->tm_sec < 0) { 349 time->tm_sec += 60; 350 time->tm_min--; 351 } 352 } 353 354 if (time->tm_min < 0 || time->tm_min >= 60) { 355 time->tm_hour += time->tm_min / 60; 356 time->tm_min %= 60; 357 if (time->tm_min < 0) { 358 time->tm_min += 60; 359 time->tm_hour--; 360 } 361 } 362 363 if (time->tm_hour < 0 || time->tm_hour >= 24) { 364 time->tm_mday += time->tm_hour / 24; 365 time->tm_hour %= 24; 366 if (time->tm_hour < 0) { 367 time->tm_hour += 24; 368 time->tm_mday--; 369 } 370 } 371 372 /* Normalize month and year before mday */ 373 if (time->tm_month < 0 || time->tm_month >= 12) { 374 time->tm_year += time->tm_month / 12; 375 time->tm_month %= 12; 376 if (time->tm_month < 0) { 377 time->tm_month += 12; 378 time->tm_year--; 379 } 380 } 381 382 /* Now that month and year are in proper range, normalize mday */ 383 384 if (time->tm_mday < 1) { 385 /* mday too small */ 386 do { 387 /* the previous month */ 388 time->tm_month--; 389 if (time->tm_month < 0) { 390 time->tm_month = 11; 391 time->tm_year--; 392 } 393 time->tm_mday += nDays[IsLeapYear(time->tm_year)][time->tm_month]; 394 } while (time->tm_mday < 1); 395 } else { 396 daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month]; 397 while (time->tm_mday > daysInMonth) { 398 /* mday too large */ 399 time->tm_mday -= daysInMonth; 400 time->tm_month++; 401 if (time->tm_month > 11) { 402 time->tm_month = 0; 403 time->tm_year++; 404 } 405 daysInMonth = nDays[IsLeapYear(time->tm_year)][time->tm_month]; 406 } 407 } 408 409 /* Recompute yday and wday */ 410 time->tm_yday = time->tm_mday + 411 lastDayOfMonth[IsLeapYear(time->tm_year)][time->tm_month]; 412 413 numDays = DAYS_BETWEEN_YEARS(1970, time->tm_year) + time->tm_yday; 414 time->tm_wday = (numDays + 4) % 7; 415 if (time->tm_wday < 0) { 416 time->tm_wday += 7; 417 } 418 419 /* Recompute time parameters */ 420 421 time->tm_params = params(time); 422 423 ApplySecOffset(time, time->tm_params.tp_gmt_offset 424 + time->tm_params.tp_dst_offset); 425} 426 427/* 428 *------------------------------------------------------------------------ 429 * 430 * PR_GMTParameters -- 431 * 432 * Returns the PRTimeParameters for Greenwich Mean Time. 433 * Trivially, both the tp_gmt_offset and tp_dst_offset fields are 0. 434 * 435 *------------------------------------------------------------------------ 436 */ 437 438PRTimeParameters 439PR_GMTParameters(const PRExplodedTime *gmt) 440{ 441#if defined(XP_MAC) 442#pragma unused (gmt) 443#endif 444 445 PRTimeParameters retVal = { 0, 0 }; 446 return retVal; 447} 448 449/* 450 * The following code implements PR_ParseTimeString(). It is based on 451 * ns/lib/xp/xp_time.c, revision 1.25, by Jamie Zawinski <jwz@netscape.com>. 452 */ 453 454/* 455 * We only recognize the abbreviations of a small subset of time zones 456 * in North America, Europe, and Japan. 457 * 458 * PST/PDT: Pacific Standard/Daylight Time 459 * MST/MDT: Mountain Standard/Daylight Time 460 * CST/CDT: Central Standard/Daylight Time 461 * EST/EDT: Eastern Standard/Daylight Time 462 * AST: Atlantic Standard Time 463 * NST: Newfoundland Standard Time 464 * GMT: Greenwich Mean Time 465 * BST: British Summer Time 466 * MET: Middle Europe Time 467 * EET: Eastern Europe Time 468 * JST: Japan Standard Time 469 */ 470 471typedef enum 472{ 473 TT_UNKNOWN, 474 475 TT_SUN, TT_MON, TT_TUE, TT_WED, TT_THU, TT_FRI, TT_SAT, 476 477 TT_JAN, TT_FEB, TT_MAR, TT_APR, TT_MAY, TT_JUN, 478 TT_JUL, TT_AUG, TT_SEP, TT_OCT, TT_NOV, TT_DEC, 479 480 TT_PST, TT_PDT, TT_MST, TT_MDT, TT_CST, TT_CDT, TT_EST, TT_EDT, 481 TT_AST, TT_NST, TT_GMT, TT_BST, TT_MET, TT_EET, TT_JST 482} TIME_TOKEN; 483 484/* 485 * This parses a time/date string into a PRTime 486 * (microseconds after "1-Jan-1970 00:00:00 GMT"). 487 * It returns PR_SUCCESS on success, and PR_FAILURE 488 * if the time/date string can't be parsed. 489 * 490 * Many formats are handled, including: 491 * 492 * 14 Apr 89 03:20:12 493 * 14 Apr 89 03:20 GMT 494 * Fri, 17 Mar 89 4:01:33 495 * Fri, 17 Mar 89 4:01 GMT 496 * Mon Jan 16 16:12 PDT 1989 497 * Mon Jan 16 16:12 +0130 1989 498 * 6 May 1992 16:41-JST (Wednesday) 499 * 22-AUG-1993 10:59:12.82 500 * 22-AUG-1993 10:59pm 501 * 22-AUG-1993 12:59am 502 * 22-AUG-1993 12:59 PM 503 * Friday, August 04, 1995 3:54 PM 504 * 06/21/95 04:24:34 PM 505 * 20/06/95 21:07 506 * 95-06-08 19:32:48 EDT 507 * 508 * If the input string doesn't contain a description of the timezone, 509 * we consult the `default_to_gmt' to decide whether the string should 510 * be interpreted relative to the local time zone (PR_FALSE) or GMT (PR_TRUE). 511 * The correct value for this argument depends on what standard specified 512 * the time string which you are parsing. 513 */ 514 515PRStatus 516PR_ParseTimeString( 517 const char *string, 518 PRBool default_to_gmt, 519 PRTime *result_imploded) 520{ 521 PRExplodedTime tm; 522 PRExplodedTime *result = &tm; 523 TIME_TOKEN dotw = TT_UNKNOWN; 524 TIME_TOKEN month = TT_UNKNOWN; 525 TIME_TOKEN zone = TT_UNKNOWN; 526 int zone_offset = -1; 527 int dst_offset = 0; 528 int date = -1; 529 PRInt32 year = -1; 530 int hour = -1; 531 int min = -1; 532 int sec = -1; 533 534 const char *rest = string; 535 536 int iterations = 0; 537 538 PR_ASSERT(string && result); 539 if (!string || !result) return PR_FAILURE; 540 541 while (*rest) 542 { 543 544 if (iterations++ > 1000) 545 { 546 return PR_FAILURE; 547 } 548 549 switch (*rest) 550 { 551 case 'a': case 'A': 552 if (month == TT_UNKNOWN && 553 (rest[1] == 'p' || rest[1] == 'P') && 554 (rest[2] == 'r' || rest[2] == 'R')) 555 month = TT_APR; 556 else if (zone == TT_UNKNOWN && 557 (rest[1] == 's' || rest[1] == 'S') && 558 (rest[2] == 't' || rest[2] == 'T')) 559 zone = TT_AST; 560 else if (month == TT_UNKNOWN && 561 (rest[1] == 'u' || rest[1] == 'U') && 562 (rest[2] == 'g' || rest[2] == 'G')) 563 month = TT_AUG; 564 break; 565 case 'b': case 'B': 566 if (zone == TT_UNKNOWN && 567 (rest[1] == 's' || rest[1] == 'S') && 568 (rest[2] == 't' || rest[2] == 'T')) 569 zone = TT_BST; 570 break; 571 case 'c': case 'C': 572 if (zone == TT_UNKNOWN && 573 (rest[1] == 'd' || rest[1] == 'D') && 574 (rest[2] == 't' || rest[2] == 'T')) 575 zone = TT_CDT; 576 else if (zone == TT_UNKNOWN && 577 (rest[1] == 's' || rest[1] == 'S') && 578 (rest[2] == 't' || rest[2] == 'T')) 579 zone = TT_CST; 580 break; 581 case 'd': case 'D': 582 if (month == TT_UNKNOWN && 583 (rest[1] == 'e' || rest[1] == 'E') && 584 (rest[2] == 'c' || rest[2] == 'C')) 585 month = TT_DEC; 586 break; 587 case 'e': case 'E': 588 if (zone == TT_UNKNOWN && 589 (rest[1] == 'd' || rest[1] == 'D') && 590 (rest[2] == 't' || rest[2] == 'T')) 591 zone = TT_EDT; 592 else if (zone == TT_UNKNOWN && 593 (rest[1] == 'e' || rest[1] == 'E') && 594 (rest[2] == 't' || rest[2] == 'T')) 595 zone = TT_EET; 596 else if (zone == TT_UNKNOWN && 597 (rest[1] == 's' || rest[1] == 'S') && 598 (rest[2] == 't' || rest[2] == 'T')) 599 zone = TT_EST; 600 break; 601 case 'f': case 'F': 602 if (month == TT_UNKNOWN && 603 (rest[1] == 'e' || rest[1] == 'E') && 604 (rest[2] == 'b' || rest[2] == 'B')) 605 month = TT_FEB; 606 else if (dotw == TT_UNKNOWN && 607 (rest[1] == 'r' || rest[1] == 'R') && 608 (rest[2] == 'i' || rest[2] == 'I')) 609 dotw = TT_FRI; 610 break; 611 case 'g': case 'G': 612 if (zone == TT_UNKNOWN && 613 (rest[1] == 'm' || rest[1] == 'M') && 614 (rest[2] == 't' || rest[2] == 'T')) 615 zone = TT_GMT; 616 break; 617 case 'j': case 'J': 618 if (month == TT_UNKNOWN && 619 (rest[1] == 'a' || rest[1] == 'A') && 620 (rest[2] == 'n' || rest[2] == 'N')) 621 month = TT_JAN; 622 else if (zone == TT_UNKNOWN && 623 (rest[1] == 's' || rest[1] == 'S') && 624 (rest[2] == 't' || rest[2] == 'T')) 625 zone = TT_JST; 626 else if (month == TT_UNKNOWN && 627 (rest[1] == 'u' || rest[1] == 'U') && 628 (rest[2] == 'l' || rest[2] == 'L')) 629 month = TT_JUL; 630 else if (month == TT_UNKNOWN && 631 (rest[1] == 'u' || rest[1] == 'U') && 632 (rest[2] == 'n' || rest[2] == 'N')) 633 month = TT_JUN; 634 break; 635 case 'm': case 'M': 636 if (month == TT_UNKNOWN && 637 (rest[1] == 'a' || rest[1] == 'A') && 638 (rest[2] == 'r' || rest[2] == 'R')) 639 month = TT_MAR; 640 else if (month == TT_UNKNOWN && 641 (rest[1] == 'a' || rest[1] == 'A') && 642 (rest[2] == 'y' || rest[2] == 'Y')) 643 month = TT_MAY; 644 else if (zone == TT_UNKNOWN && 645 (rest[1] == 'd' || rest[1] == 'D') && 646 (rest[2] == 't' || rest[2] == 'T')) 647 zone = TT_MDT; 648 else if (zone == TT_UNKNOWN && 649 (rest[1] == 'e' || rest[1] == 'E') && 650 (rest[2] == 't' || rest[2] == 'T')) 651 zone = TT_MET; 652 else if (dotw == TT_UNKNOWN && 653 (rest[1] == 'o' || rest[1] == 'O') && 654 (rest[2] == 'n' || rest[2] == 'N')) 655 dotw = TT_MON; 656 else if (zone == TT_UNKNOWN && 657 (rest[1] == 's' || rest[1] == 'S') && 658 (rest[2] == 't' || rest[2] == 'T')) 659 zone = TT_MST; 660 break; 661 case 'n': case 'N': 662 if (month == TT_UNKNOWN && 663 (rest[1] == 'o' || rest[1] == 'O') && 664 (rest[2] == 'v' || rest[2] == 'V')) 665 month = TT_NOV; 666 else if (zone == TT_UNKNOWN && 667 (rest[1] == 's' || rest[1] == 'S') && 668 (rest[2] == 't' || rest[2] == 'T')) 669 zone = TT_NST; 670 break; 671 case 'o': case 'O': 672 if (month == TT_UNKNOWN && 673 (rest[1] == 'c' || rest[1] == 'C') && 674 (rest[2] == 't' || rest[2] == 'T')) 675 month = TT_OCT; 676 break; 677 case 'p': case 'P': 678 if (zone == TT_UNKNOWN && 679 (rest[1] == 'd' || rest[1] == 'D') && 680 (rest[2] == 't' || rest[2] == 'T')) 681 zone = TT_PDT; 682 else if (zone == TT_UNKNOWN && 683 (rest[1] == 's' || rest[1] == 'S') && 684 (rest[2] == 't' || rest[2] == 'T')) 685 zone = TT_PST; 686 break; 687 case 's': case 'S': 688 if (dotw == TT_UNKNOWN && 689 (rest[1] == 'a' || rest[1] == 'A') && 690 (rest[2] == 't' || rest[2] == 'T')) 691 dotw = TT_SAT; 692 else if (month == TT_UNKNOWN && 693 (rest[1] == 'e' || rest[1] == 'E') && 694 (rest[2] == 'p' || rest[2] == 'P')) 695 month = TT_SEP; 696 else if (dotw == TT_UNKNOWN && 697 (rest[1] == 'u' || rest[1] == 'U') && 698 (rest[2] == 'n' || rest[2] == 'N')) 699 dotw = TT_SUN; 700 break; 701 case 't': case 'T': 702 if (dotw == TT_UNKNOWN && 703 (rest[1] == 'h' || rest[1] == 'H') && 704 (rest[2] == 'u' || rest[2] == 'U')) 705 dotw = TT_THU; 706 else if (dotw == TT_UNKNOWN && 707 (rest[1] == 'u' || rest[1] == 'U') && 708 (rest[2] == 'e' || rest[2] == 'E')) 709 dotw = TT_TUE; 710 break; 711 case 'u': case 'U': 712 if (zone == TT_UNKNOWN && 713 (rest[1] == 't' || rest[1] == 'T') && 714 !(rest[2] >= 'A' && rest[2] <= 'Z') && 715 !(rest[2] >= 'a' && rest[2] <= 'z')) 716 /* UT is the same as GMT but UTx is not. */ 717 zone = TT_GMT; 718 break; 719 case 'w': case 'W': 720 if (dotw == TT_UNKNOWN && 721 (rest[1] == 'e' || rest[1] == 'E') && 722 (rest[2] == 'd' || rest[2] == 'D')) 723 dotw = TT_WED; 724 break; 725 726 case '+': case '-': 727 { 728 const char *end; 729 int sign; 730 if (zone_offset != -1) 731 { 732 /* already got one... */ 733 rest++; 734 break; 735 } 736 if (zone != TT_UNKNOWN && zone != TT_GMT) 737 { 738 /* GMT+0300 is legal, but PST+0300 is not. */ 739 rest++; 740 break; 741 } 742 743 sign = ((*rest == '+') ? 1 : -1); 744 rest++; /* move over sign */ 745 end = rest; 746 while (*end >= '0' && *end <= '9') 747 end++; 748 if (rest == end) /* no digits here */ 749 break; 750 751 if ((end - rest) == 4) 752 /* offset in HHMM */ 753 zone_offset = (((((rest[0]-'0')*10) + (rest[1]-'0')) * 60) + 754 (((rest[2]-'0')*10) + (rest[3]-'0'))); 755 else if ((end - rest) == 2) 756 /* offset in hours */ 757 zone_offset = (((rest[0]-'0')*10) + (rest[1]-'0')) * 60; 758 else if ((end - rest) == 1) 759 /* offset in hours */ 760 zone_offset = (rest[0]-'0') * 60; 761 else 762 /* 3 or >4 */ 763 break; 764 765 zone_offset *= sign; 766 zone = TT_GMT; 767 break; 768 } 769 770 case '0': case '1': case '2': case '3': case '4': 771 case '5': case '6': case '7': case '8': case '9': 772 { 773 int tmp_hour = -1; 774 int tmp_min = -1; 775 int tmp_sec = -1; 776 const char *end = rest + 1; 777 while (*end >= '0' && *end <= '9') 778 end++; 779 780 /* end is now the first character after a range of digits. */ 781 782 if (*end == ':') 783 { 784 if (hour >= 0 && min >= 0) /* already got it */ 785 break; 786 787 /* We have seen "[0-9]+:", so this is probably HH:MM[:SS] */ 788 if ((end - rest) > 2) 789 /* it is [0-9][0-9][0-9]+: */ 790 break; 791 else if ((end - rest) == 2) 792 tmp_hour = ((rest[0]-'0')*10 + 793 (rest[1]-'0')); 794 else 795 tmp_hour = (rest[0]-'0'); 796 797 /* move over the colon, and parse minutes */ 798 799 rest = ++end; 800 while (*end >= '0' && *end <= '9') 801 end++; 802 803 if (end == rest) 804 /* no digits after first colon? */ 805 break; 806 else if ((end - rest) > 2) 807 /* it is [0-9][0-9][0-9]+: */ 808 break; 809 else if ((end - rest) == 2) 810 tmp_min = ((rest[0]-'0')*10 + 811 (rest[1]-'0')); 812 else 813 tmp_min = (rest[0]-'0'); 814 815 /* now go for seconds */ 816 rest = end; 817 if (*rest == ':') 818 rest++; 819 end = rest; 820 while (*end >= '0' && *end <= '9') 821 end++; 822 823 if (end == rest) 824 /* no digits after second colon - that's ok. */ 825 ; 826 else if ((end - rest) > 2) 827 /* it is [0-9][0-9][0-9]+: */ 828 break; 829 else if ((end - rest) == 2) 830 tmp_sec = ((rest[0]-'0')*10 + 831 (rest[1]-'0')); 832 else 833 tmp_sec = (rest[0]-'0'); 834 835 /* If we made it here, we've parsed hour and min, 836 and possibly sec, so it worked as a unit. */ 837 838 /* skip over whitespace and see if there's an AM or PM 839 directly following the time. 840 */ 841 if (tmp_hour <= 12) 842 { 843 const char *s = end; 844 while (*s && (*s == ' ' || *s == '\t')) 845 s++; 846 if ((s[0] == 'p' || s[0] == 'P') && 847 (s[1] == 'm' || s[1] == 'M')) 848 /* 10:05pm == 22:05, and 12:05pm == 12:05 */ 849 tmp_hour = (tmp_hour == 12 ? 12 : tmp_hour + 12); 850 else if (tmp_hour == 12 && 851 (s[0] == 'a' || s[0] == 'A') && 852 (s[1] == 'm' || s[1] == 'M')) 853 /* 12:05am == 00:05 */ 854 tmp_hour = 0; 855 } 856 857 hour = tmp_hour; 858 min = tmp_min; 859 sec = tmp_sec; 860 rest = end; 861 break; 862 } 863 else if ((*end == '/' || *end == '-') && 864 end[1] >= '0' && end[1] <= '9') 865 { 866 /* Perhaps this is 6/16/95, 16/6/95, 6-16-95, or 16-6-95 867 or even 95-06-05... 868 #### But it doesn't handle 1995-06-22. 869 */ 870 int n1, n2, n3; 871 const char *s; 872 873 if (month != TT_UNKNOWN) 874 /* if we saw a month name, this can't be. */ 875 break; 876 877 s = rest; 878 879 n1 = (*s++ - '0'); /* first 1 or 2 digits */ 880 if (*s >= '0' && *s <= '9') 881 n1 = n1*10 + (*s++ - '0'); 882 883 if (*s != '/' && *s != '-') /* slash */ 884 break; 885 s++; 886 887 if (*s < '0' || *s > '9') /* second 1 or 2 digits */ 888 break; 889 n2 = (*s++ - '0'); 890 if (*s >= '0' && *s <= '9') 891 n2 = n2*10 + (*s++ - '0'); 892 893 if (*s != '/' && *s != '-') /* slash */ 894 break; 895 s++; 896 897 if (*s < '0' || *s > '9') /* third 1, 2, 4, or 5 digits */ 898 break; 899 n3 = (*s++ - '0'); 900 if (*s >= '0' && *s <= '9') 901 n3 = n3*10 + (*s++ - '0'); 902 903 if (*s >= '0' && *s <= '9') /* optional digits 3, 4, and 5 */ 904 { 905 n3 = n3*10 + (*s++ - '0'); 906 if (*s < '0' || *s > '9') 907 break; 908 n3 = n3*10 + (*s++ - '0'); 909 if (*s >= '0' && *s <= '9') 910 n3 = n3*10 + (*s++ - '0'); 911 } 912 913 if ((*s >= '0' && *s <= '9') || /* followed by non-alphanum */ 914 (*s >= 'A' && *s <= 'Z') || 915 (*s >= 'a' && *s <= 'z')) 916 break; 917 918 /* Ok, we parsed three 1-2 digit numbers, with / or - 919 between them. Now decide what the hell they are 920 (DD/MM/YY or MM/DD/YY or YY/MM/DD.) 921 */ 922 923 if (n1 > 31 || n1 == 0) /* must be YY/MM/DD */ 924 { 925 if (n2 > 12) break; 926 if (n3 > 31) break; 927 year = n1; 928 if (year < 70) 929 year += 2000; 930 else if (year < 100) 931 year += 1900; 932 month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1); 933 date = n3; 934 rest = s; 935 break; 936 } 937 938 if (n1 > 12 && n2 > 12) /* illegal */ 939 { 940 rest = s; 941 break; 942 } 943 944 if (n3 < 70) 945 n3 += 2000; 946 else if (n3 < 100) 947 n3 += 1900; 948 949 if (n1 > 12) /* must be DD/MM/YY */ 950 { 951 date = n1; 952 month = (TIME_TOKEN)(n2 + ((int)TT_JAN) - 1); 953 year = n3; 954 } 955 else /* assume MM/DD/YY */ 956 { 957 /* #### In the ambiguous case, should we consult the 958 locale to find out the local default? */ 959 month = (TIME_TOKEN)(n1 + ((int)TT_JAN) - 1); 960 date = n2; 961 year = n3; 962 } 963 rest = s; 964 } 965 else if ((*end >= 'A' && *end <= 'Z') || 966 (*end >= 'a' && *end <= 'z')) 967 /* Digits followed by non-punctuation - what's that? */ 968 ; 969 else if ((end - rest) == 5) /* five digits is a year */ 970 year = (year < 0 971 ? ((rest[0]-'0')*10000L + 972 (rest[1]-'0')*1000L + 973 (rest[2]-'0')*100L + 974 (rest[3]-'0')*10L + 975 (rest[4]-'0')) 976 : year); 977 else if ((end - rest) == 4) /* four digits is a year */ 978 year = (year < 0 979 ? ((rest[0]-'0')*1000L + 980 (rest[1]-'0')*100L + 981 (rest[2]-'0')*10L + 982 (rest[3]-'0')) 983 : year); 984 else if ((end - rest) == 2) /* two digits - date or year */ 985 { 986 int n = ((rest[0]-'0')*10 + 987 (rest[1]-'0')); 988 /* If we don't have a date (day of the month) and we see a number 989 less than 32, then assume that is the date. 990 991 Otherwise, if we have a date and not a year, assume this is the 992 year. If it is less than 70, then assume it refers to the 21st 993 century. If it is two digits (>= 70), assume it refers to this 994 century. Otherwise, assume it refers to an unambiguous year. 995 996 The world will surely end soon. 997 */ 998 if (date < 0 && n < 32) 999 date = n; 1000 else if (year < 0) 1001 { 1002 if (n < 70) 1003 year = 2000 + n; 1004 else if (n < 100) 1005 year = 1900 + n; 1006 else 1007 year = n; 1008 } 1009 /* else what the hell is this. */ 1010 } 1011 else if ((end - rest) == 1) /* one digit - date */ 1012 date = (date < 0 ? (rest[0]-'0') : date); 1013 /* else, three or more than five digits - what's that? */ 1014 1015 break; 1016 } 1017 } 1018 1019 /* Skip to the end of this token, whether we parsed it or not. 1020 Tokens are delimited by whitespace, or ,;-/ 1021 But explicitly not :+-. 1022 */ 1023 while (*rest && 1024 *rest != ' ' && *rest != '\t' && 1025 *rest != ',' && *rest != ';' && 1026 *rest != '-' && *rest != '+' && 1027 *rest != '/' && 1028 *rest != '(' && *rest != ')' && *rest != '[' && *rest != ']') 1029 rest++; 1030 /* skip over uninteresting chars. */ 1031 SKIP_MORE: 1032 while (*rest && 1033 (*rest == ' ' || *rest == '\t' || 1034 *rest == ',' || *rest == ';' || *rest == '/' || 1035 *rest == '(' || *rest == ')' || *rest == '[' || *rest == ']')) 1036 rest++; 1037 1038 /* "-" is ignored at the beginning of a token if we have not yet 1039 parsed a year (e.g., the second "-" in "30-AUG-1966"), or if 1040 the character after the dash is not a digit. */ 1041 if (*rest == '-' && ((rest > string && isalpha(rest[-1]) && year < 0) 1042 || rest[1] < '0' || rest[1] > '9')) 1043 { 1044 rest++; 1045 goto SKIP_MORE; 1046 } 1047 1048 } 1049 1050 if (zone != TT_UNKNOWN && zone_offset == -1) 1051 { 1052 switch (zone) 1053 { 1054 case TT_PST: zone_offset = -8 * 60; break; 1055 case TT_PDT: zone_offset = -8 * 60; dst_offset = 1 * 60; break; 1056 case TT_MST: zone_offset = -7 * 60; break; 1057 case TT_MDT: zone_offset = -7 * 60; dst_offset = 1 * 60; break; 1058 case TT_CST: zone_offset = -6 * 60; break; 1059 case TT_CDT: zone_offset = -6 * 60; dst_offset = 1 * 60; break; 1060 case TT_EST: zone_offset = -5 * 60; break; 1061 case TT_EDT: zone_offset = -5 * 60; dst_offset = 1 * 60; break; 1062 case TT_AST: zone_offset = -4 * 60; break; 1063 case TT_NST: zone_offset = -3 * 60 - 30; break; 1064 case TT_GMT: zone_offset = 0 * 60; break; 1065 case TT_BST: zone_offset = 0 * 60; dst_offset = 1 * 60; break; 1066 case TT_MET: zone_offset = 1 * 60; break; 1067 case TT_EET: zone_offset = 2 * 60; break; 1068 case TT_JST: zone_offset = 9 * 60; break; 1069 default: 1070 PR_ASSERT (0); 1071 break; 1072 } 1073 } 1074 1075 /* If we didn't find a year, month, or day-of-the-month, we can't 1076 possibly parse this, and in fact, mktime() will do something random 1077 (I'm seeing it return "Tue Feb 5 06:28:16 2036", which is no doubt 1078 a numerologically significant date... */ 1079 if (month == TT_UNKNOWN || date == -1 || year == -1 || year > PR_INT16_MAX) 1080 return PR_FAILURE; 1081 1082 memset(result, 0, sizeof(*result)); 1083 if (sec != -1) 1084 result->tm_sec = sec; 1085 if (min != -1) 1086 result->tm_min = min; 1087 if (hour != -1) 1088 result->tm_hour = hour; 1089 if (date != -1) 1090 result->tm_mday = date; 1091 if (month != TT_UNKNOWN) 1092 result->tm_month = (((int)month) - ((int)TT_JAN)); 1093 if (year != -1) 1094 result->tm_year = year; 1095 if (dotw != TT_UNKNOWN) 1096 result->tm_wday = (((int)dotw) - ((int)TT_SUN)); 1097 /* 1098 * Mainly to compute wday and yday, but normalized time is also required 1099 * by the check below that works around a Visual C++ 2005 mktime problem. 1100 */ 1101 PR_NormalizeTime(result, PR_GMTParameters); 1102 /* The remaining work is to set the gmt and dst offsets in tm_params. */ 1103 1104 if (zone == TT_UNKNOWN && default_to_gmt) 1105 { 1106 /* No zone was specified, so pretend the zone was GMT. */ 1107 zone = TT_GMT; 1108 zone_offset = 0; 1109 } 1110 1111 if (zone_offset == -1) 1112 { 1113 /* no zone was specified, and we're to assume that everything 1114 is local. */ 1115 struct tm localTime; 1116 time_t secs; 1117 1118 PR_ASSERT(result->tm_month > -1 && 1119 result->tm_mday > 0 && 1120 result->tm_hour > -1 && 1121 result->tm_min > -1 && 1122 result->tm_sec > -1); 1123 1124 /* 1125 * To obtain time_t from a tm structure representing the local 1126 * time, we call mktime(). However, we need to see if we are 1127 * on 1-Jan-1970 or before. If we are, we can't call mktime() 1128 * because mktime() will crash on win16. In that case, we 1129 * calculate zone_offset based on the zone offset at 1130 * 00:00:00, 2 Jan 1970 GMT, and subtract zone_offset from the 1131 * date we are parsing to transform the date to GMT. We also 1132 * do so if mktime() returns (time_t) -1 (time out of range). 1133 */ 1134 1135 /* month, day, hours, mins and secs are always non-negative 1136 so we dont need to worry about them. */ 1137 if(result->tm_year >= 1970) 1138 { 1139 PRInt64 usec_per_sec; 1140 1141 localTime.tm_sec = result->tm_sec; 1142 localTime.tm_min = result->tm_min; 1143 localTime.tm_hour = result->tm_hour; 1144 localTime.tm_mday = result->tm_mday; 1145 localTime.tm_mon = result->tm_month; 1146 localTime.tm_year = result->tm_year - 1900; 1147 /* Set this to -1 to tell mktime "I don't care". If you set 1148 it to 0 or 1, you are making assertions about whether the 1149 date you are handing it is in daylight savings mode or not; 1150 and if you're wrong, it will "fix" it for you. */ 1151 localTime.tm_isdst = -1; 1152 1153#if _MSC_VER == 1400 /* 1400 = Visual C++ 2005 (8.0) */ 1154 /* 1155 * mktime will return (time_t) -1 if the input is a date 1156 * after 23:59:59, December 31, 3000, US Pacific Time (not 1157 * UTC as documented): 1158 * http://msdn.microsoft.com/en-us/library/d1y53h2a(VS.80).aspx 1159 * But if the year is 3001, mktime also invokes the invalid 1160 * parameter handler, causing the application to crash. This 1161 * problem has been reported in 1162 * http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=266036. 1163 * We avoid this crash by not calling mktime if the date is 1164 * out of range. To use a simple test that works in any time 1165 * zone, we consider year 3000 out of range as well. (See 1166 * bug 480740.) 1167 */ 1168 if (result->tm_year >= 3000) { 1169 /* Emulate what mktime would have done. */ 1170 errno = EINVAL; 1171 secs = (time_t) -1; 1172 } else { 1173 secs = mktime(&localTime); 1174 } 1175#else 1176 secs = mktime(&localTime); 1177#endif 1178 if (secs != (time_t) -1) 1179 { 1180 PRTime usecs64; 1181 LL_I2L(usecs64, secs); 1182 LL_I2L(usec_per_sec, PR_USEC_PER_SEC); 1183 LL_MUL(usecs64, usecs64, usec_per_sec); 1184 *result_imploded = usecs64; 1185 return PR_SUCCESS; 1186 } 1187 } 1188 1189 /* So mktime() can't handle this case. We assume the 1190 zone_offset for the date we are parsing is the same as 1191 the zone offset on 00:00:00 2 Jan 1970 GMT. */ 1192 secs = 86400; 1193 localtime_r(&secs, &localTime); 1194 zone_offset = localTime.tm_min 1195 + 60 * localTime.tm_hour 1196 + 1440 * (localTime.tm_mday - 2); 1197 } 1198 1199 result->tm_params.tp_gmt_offset = zone_offset * 60; 1200 result->tm_params.tp_dst_offset = dst_offset * 60; 1201 1202 *result_imploded = PR_ImplodeTime(result); 1203 return PR_SUCCESS; 1204} 1205