lib/libc/stdtime/strptime.c

   1 /*-
   2  * Copyright (c) 2014 Gary Mills
   3  * Copyright 2011, Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 1994 Powerdog Industries.  All rights reserved.
   5  *
   6  * Copyright (c) 2011 The FreeBSD Foundation
   7  * All rights reserved.
   8  * Portions of this software were developed by David Chisnall
   9  * under sponsorship from the FreeBSD Foundation.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer
  18  *    in the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY POWERDOG INDUSTRIES ``AS IS'' AND ANY
  22  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE POWERDOG INDUSTRIES BE
  25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  30  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  31  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  * The views and conclusions contained in the software and documentation
  34  * are those of the authors and should not be interpreted as representing
  35  * official policies, either expressed or implied, of Powerdog Industries.
  36  */
  37
  38 #include <sys/cdefs.h>
  39 #ifndef lint
  40 #ifndef NOID
  41 static char copyright[] __unused =
  42 "@(#) Copyright (c) 1994 Powerdog Industries.  All rights reserved.";
  43 static char sccsid[] __unused = "@(#)strptime.c 0.1 (Powerdog) 94/03/27";
  44 #endif /* !defined NOID */
  45 #endif /* not lint */
  46 __FBSDID("$FreeBSD$");
  47
  48 #include "namespace.h"
  49 #include <time.h>
  50 #include <ctype.h>
  51 #include <errno.h>
  52 #include <stdlib.h>
  53 #include <string.h>
  54 #include <pthread.h>
  55 #include "un-namespace.h"
  56 #include "libc_private.h"
  57 #include "timelocal.h"
  58 #include "tzfile.h"
  59
  60 static char * _strptime(const char *, const char *, struct tm *, int *, locale_t);
  61
  62 #define asizeof(a)      (sizeof(a) / sizeof((a)[0]))
  63
  64 #define FLAG_NONE       (1 << 0)
  65 #define FLAG_YEAR       (1 << 1)
  66 #define FLAG_MONTH      (1 << 2)
  67 #define FLAG_YDAY       (1 << 3)
  68 #define FLAG_MDAY       (1 << 4)
  69 #define FLAG_WDAY       (1 << 5)
  70
  71 /*
  72  * Calculate the week day of the first day of a year. Valid for
  73  * the Gregorian calendar, which began Sept 14, 1752 in the UK
  74  * and its colonies. Ref:
  75  * http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week
  76  */
  77
  78 static int
  79 first_wday_of(int year)
  80 {
  81         return (((2 * (3 - (year / 100) % 4)) + (year % 100) +
  82                 ((year % 100) / 4) + (isleap(year) ? 6 : 0) + 1) % 7);
  83 }
  84
  85 static char *
  86 _strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp,
  87                 locale_t locale)
  88 {
  89         char    c;
  90         const char *ptr;
  91         int     day_offset = -1, wday_offset;
  92         int week_offset;
  93         int     i, len;
  94         int flags;
  95         int Ealternative, Oalternative;
  96         const struct lc_time_T *tptr = __get_current_time_locale(locale);
  97         static int start_of_month[2][13] = {
  98                 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
  99                 {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
 100         };
 101
 102         flags = FLAG_NONE;
 103
 104         ptr = fmt;
 105         while (*ptr != 0) {
 106                 c = *ptr++;
 107
 108                 if (c != '%') {
 109                         if (isspace_l((unsigned char)c, locale))
 110                                 while (*buf != 0 &&
 111                                        isspace_l((unsigned char)*buf, locale))
 112                                         buf++;
 113                         else if (c != *buf++)
 114                                 return (NULL);
 115                         continue;
 116                 }
 117
 118                 Ealternative = 0;
 119                 Oalternative = 0;
 120 label:
 121                 c = *ptr++;
 122                 switch (c) {
 123                 case '%':
 124                         if (*buf++ != '%')
 125                                 return (NULL);
 126                         break;
 127
 128                 case '+':
 129                         buf = _strptime(buf, tptr->date_fmt, tm, GMTp, locale);
 130                         if (buf == NULL)
 131                                 return (NULL);
 132                         flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 133                         break;
 134
 135                 case 'C':
 136                         if (!isdigit_l((unsigned char)*buf, locale))
 137                                 return (NULL);
 138
 139                         /* XXX This will break for 3-digit centuries. */
 140                         len = 2;
 141                         for (i = 0; len && *buf != 0 &&
 142                              isdigit_l((unsigned char)*buf, locale); buf++) {
 143                                 i *= 10;
 144                                 i += *buf - '0';
 145                                 len--;
 146                         }
 147                         if (i < 19)
 148                                 return (NULL);
 149
 150                         tm->tm_year = i * 100 - TM_YEAR_BASE;
 151                         flags |= FLAG_YEAR;
 152
 153                         break;
 154
 155                 case 'c':
 156                         buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale);
 157                         if (buf == NULL)
 158                                 return (NULL);
 159                         flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 160                         break;
 161
 162                 case 'D':
 163                         buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale);
 164                         if (buf == NULL)
 165                                 return (NULL);
 166                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 167                         break;
 168
 169                 case 'E':
 170                         if (Ealternative || Oalternative)
 171                                 break;
 172                         Ealternative++;
 173                         goto label;
 174
 175                 case 'O':
 176                         if (Ealternative || Oalternative)
 177                                 break;
 178                         Oalternative++;
 179                         goto label;
 180
 181                 case 'F':
 182                         buf = _strptime(buf, "%Y-%m-%d", tm, GMTp, locale);
 183                         if (buf == NULL)
 184                                 return (NULL);
 185                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 186                         break;
 187
 188                 case 'R':
 189                         buf = _strptime(buf, "%H:%M", tm, GMTp, locale);
 190                         if (buf == NULL)
 191                                 return (NULL);
 192                         break;
 193
 194                 case 'r':
 195                         buf = _strptime(buf, tptr->ampm_fmt, tm, GMTp, locale);
 196                         if (buf == NULL)
 197                                 return (NULL);
 198                         break;
 199
 200                 case 'T':
 201                         buf = _strptime(buf, "%H:%M:%S", tm, GMTp, locale);
 202                         if (buf == NULL)
 203                                 return (NULL);
 204                         break;
 205
 206                 case 'X':
 207                         buf = _strptime(buf, tptr->X_fmt, tm, GMTp, locale);
 208                         if (buf == NULL)
 209                                 return (NULL);
 210                         break;
 211
 212                 case 'x':
 213                         buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale);
 214                         if (buf == NULL)
 215                                 return (NULL);
 216                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 217                         break;
 218
 219                 case 'j':
 220                         if (!isdigit_l((unsigned char)*buf, locale))
 221                                 return (NULL);
 222
 223                         len = 3;
 224                         for (i = 0; len && *buf != 0 &&
 225                              isdigit_l((unsigned char)*buf, locale); buf++){
 226                                 i *= 10;
 227                                 i += *buf - '0';
 228                                 len--;
 229                         }
 230                         if (i < 1 || i > 366)
 231                                 return (NULL);
 232
 233                         tm->tm_yday = i - 1;
 234                         flags |= FLAG_YDAY;
 235
 236                         break;
 237
 238                 case 'M':
 239                 case 'S':
 240                         if (*buf == 0 ||
 241                                 isspace_l((unsigned char)*buf, locale))
 242                                 break;
 243
 244                         if (!isdigit_l((unsigned char)*buf, locale))
 245                                 return (NULL);
 246
 247                         len = 2;
 248                         for (i = 0; len && *buf != 0 &&
 249                                 isdigit_l((unsigned char)*buf, locale); buf++){
 250                                 i *= 10;
 251                                 i += *buf - '0';
 252                                 len--;
 253                         }
 254
 255                         if (c == 'M') {
 256                                 if (i > 59)
 257                                         return (NULL);
 258                                 tm->tm_min = i;
 259                         } else {
 260                                 if (i > 60)
 261                                         return (NULL);
 262                                 tm->tm_sec = i;
 263                         }
 264
 265                         break;
 266
 267                 case 'H':
 268                 case 'I':
 269                 case 'k':
 270                 case 'l':
 271                         /*
 272                          * Of these, %l is the only specifier explicitly
 273                          * documented as not being zero-padded.  However,
 274                          * there is no harm in allowing zero-padding.
 275                          *
 276                          * XXX The %l specifier may gobble one too many
 277                          * digits if used incorrectly.
 278                          */
 279                         if (!isdigit_l((unsigned char)*buf, locale))
 280                                 return (NULL);
 281
 282                         len = 2;
 283                         for (i = 0; len && *buf != 0 &&
 284                              isdigit_l((unsigned char)*buf, locale); buf++) {
 285                                 i *= 10;
 286                                 i += *buf - '0';
 287                                 len--;
 288                         }
 289                         if (c == 'H' || c == 'k') {
 290                                 if (i > 23)
 291                                         return (NULL);
 292                         } else if (i > 12)
 293                                 return (NULL);
 294
 295                         tm->tm_hour = i;
 296
 297                         break;
 298
 299                 case 'p':
 300                         /*
 301                          * XXX This is bogus if parsed before hour-related
 302                          * specifiers.
 303                          */
 304                         if (tm->tm_hour > 12)
 305                                 return (NULL);
 306
 307                         len = strlen(tptr->am);
 308                         if (strncasecmp_l(buf, tptr->am, len, locale) == 0) {
 309                                 if (tm->tm_hour == 12)
 310                                         tm->tm_hour = 0;
 311                                 buf += len;
 312                                 break;
 313                         }
 314
 315                         len = strlen(tptr->pm);
 316                         if (strncasecmp_l(buf, tptr->pm, len, locale) == 0) {
 317                                 if (tm->tm_hour != 12)
 318                                         tm->tm_hour += 12;
 319                                 buf += len;
 320                                 break;
 321                         }
 322
 323                         return (NULL);
 324
 325                 case 'A':
 326                 case 'a':
 327                         for (i = 0; i < asizeof(tptr->weekday); i++) {
 328                                 len = strlen(tptr->weekday[i]);
 329                                 if (strncasecmp_l(buf, tptr->weekday[i],
 330                                                 len, locale) == 0)
 331                                         break;
 332                                 len = strlen(tptr->wday[i]);
 333                                 if (strncasecmp_l(buf, tptr->wday[i],
 334                                                 len, locale) == 0)
 335                                         break;
 336                         }
 337                         if (i == asizeof(tptr->weekday))
 338                                 return (NULL);
 339
 340                         buf += len;
 341                         tm->tm_wday = i;
 342                         flags |= FLAG_WDAY;
 343                         break;
 344
 345                 case 'U':
 346                 case 'W':
 347                         /*
 348                          * XXX This is bogus, as we can not assume any valid
 349                          * information present in the tm structure at this
 350                          * point to calculate a real value, so just check the
 351                          * range for now.
 352                          */
 353                         if (!isdigit_l((unsigned char)*buf, locale))
 354                                 return (NULL);
 355
 356                         len = 2;
 357                         for (i = 0; len && *buf != 0 &&
 358                              isdigit_l((unsigned char)*buf, locale); buf++) {
 359                                 i *= 10;
 360                                 i += *buf - '0';
 361                                 len--;
 362                         }
 363                         if (i > 53)
 364                                 return (NULL);
 365
 366                         if (c == 'U')
 367                                 day_offset = TM_SUNDAY;
 368                         else
 369                                 day_offset = TM_MONDAY;
 370
 371
 372                         week_offset = i;
 373
 374                         break;
 375
 376                 case 'u':
 377                 case 'w':
 378                         if (!isdigit_l((unsigned char)*buf, locale))
 379                                 return (NULL);
 380
 381                         i = *buf++ - '0';
 382                         if (i < 0 || i > 7 || (c == 'u' && i < 1) ||
 383                             (c == 'w' && i > 6))
 384                                 return (NULL);
 385
 386                         tm->tm_wday = i % 7;
 387                         flags |= FLAG_WDAY;
 388
 389                         break;
 390
 391                 case 'e':
 392                         /*
 393                          * With %e format, our strftime(3) adds a blank space
 394                          * before single digits.
 395                          */
 396                         if (*buf != 0 &&
 397                             isspace_l((unsigned char)*buf, locale))
 398                                buf++;
 399                         /* FALLTHROUGH */
 400                 case 'd':
 401                         /*
 402                          * The %e specifier was once explicitly documented as
 403                          * not being zero-padded but was later changed to
 404                          * equivalent to %d.  There is no harm in allowing
 405                          * such padding.
 406                          *
 407                          * XXX The %e specifier may gobble one too many
 408                          * digits if used incorrectly.
 409                          */
 410                         if (!isdigit_l((unsigned char)*buf, locale))
 411                                 return (NULL);
 412
 413                         len = 2;
 414                         for (i = 0; len && *buf != 0 &&
 415                              isdigit_l((unsigned char)*buf, locale); buf++) {
 416                                 i *= 10;
 417                                 i += *buf - '0';
 418                                 len--;
 419                         }
 420                         if (i > 31)
 421                                 return (NULL);
 422
 423                         tm->tm_mday = i;
 424                         flags |= FLAG_MDAY;
 425
 426                         break;
 427
 428                 case 'B':
 429                 case 'b':
 430                 case 'h':
 431                         for (i = 0; i < asizeof(tptr->month); i++) {
 432                                 if (Oalternative) {
 433                                         if (c == 'B') {
 434                                                 len = strlen(tptr->alt_month[i]);
 435                                                 if (strncasecmp_l(buf,
 436                                                                 tptr->alt_month[i],
 437                                                                 len, locale) == 0)
 438                                                         break;
 439                                         }
 440                                 } else {
 441                                         len = strlen(tptr->month[i]);
 442                                         if (strncasecmp_l(buf, tptr->month[i],
 443                                                         len, locale) == 0)
 444                                                 break;
 445                                 }
 446                         }
 447                         /*
 448                          * Try the abbreviated month name if the full name
 449                          * wasn't found and Oalternative was not requested.
 450                          */
 451                         if (i == asizeof(tptr->month) && !Oalternative) {
 452                                 for (i = 0; i < asizeof(tptr->month); i++) {
 453                                         len = strlen(tptr->mon[i]);
 454                                         if (strncasecmp_l(buf, tptr->mon[i],
 455                                                         len, locale) == 0)
 456                                                 break;
 457                                 }
 458                         }
 459                         if (i == asizeof(tptr->month))
 460                                 return (NULL);
 461
 462                         tm->tm_mon = i;
 463                         buf += len;
 464                         flags |= FLAG_MONTH;
 465
 466                         break;
 467
 468                 case 'm':
 469                         if (!isdigit_l((unsigned char)*buf, locale))
 470                                 return (NULL);
 471
 472                         len = 2;
 473                         for (i = 0; len && *buf != 0 &&
 474                              isdigit_l((unsigned char)*buf, locale); buf++) {
 475                                 i *= 10;
 476                                 i += *buf - '0';
 477                                 len--;
 478                         }
 479                         if (i < 1 || i > 12)
 480                                 return (NULL);
 481
 482                         tm->tm_mon = i - 1;
 483                         flags |= FLAG_MONTH;
 484
 485                         break;
 486
 487                 case 's':
 488                         {
 489                         char *cp;
 490                         int sverrno;
 491                         long n;
 492                         time_t t;
 493
 494                         sverrno = errno;
 495                         errno = 0;
 496                         n = strtol_l(buf, &cp, 10, locale);
 497                         if (errno == ERANGE || (long)(t = n) != n) {
 498                                 errno = sverrno;
 499                                 return (NULL);
 500                         }
 501                         errno = sverrno;
 502                         buf = cp;
 503                         if (gmtime_r(&t, tm) == NULL)
 504                                 return (NULL);
 505                         *GMTp = 1;
 506                         flags |= FLAG_YDAY | FLAG_WDAY | FLAG_MONTH |
 507                             FLAG_MDAY | FLAG_YEAR;
 508                         }
 509                         break;
 510
 511                 case 'Y':
 512                 case 'y':
 513                         if (*buf == 0 ||
 514                             isspace_l((unsigned char)*buf, locale))
 515                                 break;
 516
 517                         if (!isdigit_l((unsigned char)*buf, locale))
 518                                 return (NULL);
 519
 520                         len = (c == 'Y') ? 4 : 2;
 521                         for (i = 0; len && *buf != 0 &&
 522                              isdigit_l((unsigned char)*buf, locale); buf++) {
 523                                 i *= 10;
 524                                 i += *buf - '0';
 525                                 len--;
 526                         }
 527                         if (c == 'Y')
 528                                 i -= TM_YEAR_BASE;
 529                         if (c == 'y' && i < 69)
 530                                 i += 100;
 531                         if (i < 0)
 532                                 return (NULL);
 533
 534                         tm->tm_year = i;
 535                         flags |= FLAG_YEAR;
 536
 537                         break;
 538
 539                 case 'Z':
 540                         {
 541                         const char *cp;
 542                         char *zonestr;
 543
 544                         for (cp = buf; *cp &&
 545                              isupper_l((unsigned char)*cp, locale); ++cp) {
 546                                 /*empty*/}
 547                         if (cp - buf) {
 548                                 zonestr = alloca(cp - buf + 1);
 549                                 strncpy(zonestr, buf, cp - buf);
 550                                 zonestr[cp - buf] = '\0';
 551                                 tzset();
 552                                 if (0 == strcmp(zonestr, "GMT") ||
 553                                     0 == strcmp(zonestr, "UTC")) {
 554                                     *GMTp = 1;
 555                                 } else if (0 == strcmp(zonestr, tzname[0])) {
 556                                     tm->tm_isdst = 0;
 557                                 } else if (0 == strcmp(zonestr, tzname[1])) {
 558                                     tm->tm_isdst = 1;
 559                                 } else {
 560                                     return (NULL);
 561                                 }
 562                                 buf += cp - buf;
 563                         }
 564                         }
 565                         break;
 566
 567                 case 'z':
 568                         {
 569                         int sign = 1;
 570
 571                         if (*buf != '+') {
 572                                 if (*buf == '-')
 573                                         sign = -1;
 574                                 else
 575                                         return (NULL);
 576                         }
 577
 578                         buf++;
 579                         i = 0;
 580                         for (len = 4; len > 0; len--) {
 581                                 if (isdigit_l((unsigned char)*buf, locale)) {
 582                                         i *= 10;
 583                                         i += *buf - '0';
 584                                         buf++;
 585                                 } else if (len == 2) {
 586                                         i *= 100;
 587                                         break;
 588                                 } else
 589                                         return (NULL);
 590                         }
 591
 592                         if (i > 1400 || (sign == -1 && i > 1200) ||
 593                             (i % 100) >= 60)
 594                                 return (NULL);
 595                         tm->tm_hour -= sign * (i / 100);
 596                         tm->tm_min  -= sign * (i % 100);
 597                         *GMTp = 1;
 598                         }
 599                         break;
 600
 601                 case 'n':
 602                 case 't':
 603                         while (isspace_l((unsigned char)*buf, locale))
 604                                 buf++;
 605                         break;
 606
 607                 default:
 608                         return (NULL);
 609                 }
 610         }
 611
 612         if (!(flags & FLAG_YDAY) && (flags & FLAG_YEAR)) {
 613                 if ((flags & (FLAG_MONTH | FLAG_MDAY)) ==
 614                     (FLAG_MONTH | FLAG_MDAY)) {
 615                         tm->tm_yday = start_of_month[isleap(tm->tm_year +
 616                             TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1);
 617                         flags |= FLAG_YDAY;
 618                 } else if (day_offset != -1) {
 619                         int tmpwday, tmpyday, fwo;
 620
 621                         fwo = first_wday_of(tm->tm_year + TM_YEAR_BASE);
 622                         /* No incomplete week (week 0). */
 623                         if (week_offset == 0 && fwo == day_offset)
 624                                 return (NULL);
 625
 626                         /* Set the date to the first Sunday (or Monday)
 627                          * of the specified week of the year.
 628                          */
 629                         tmpwday = (flags & FLAG_WDAY) ? tm->tm_wday :
 630                             day_offset;
 631                         tmpyday = (7 - fwo + day_offset) % 7 +
 632                             (week_offset - 1) * 7 +
 633                             (tmpwday - day_offset + 7) % 7;
 634                         /* Impossible yday for incomplete week (week 0). */
 635                         if (tmpyday < 0) {
 636                                 if (flags & FLAG_WDAY)
 637                                         return (NULL);
 638                                 tmpyday = 0;
 639                         }
 640                         tm->tm_yday = tmpyday;
 641                         flags |= FLAG_YDAY;
 642                 }
 643         }
 644
 645         if ((flags & (FLAG_YEAR | FLAG_YDAY)) == (FLAG_YEAR | FLAG_YDAY)) {
 646                 if (!(flags & FLAG_MONTH)) {
 647                         i = 0;
 648                         while (tm->tm_yday >=
 649                             start_of_month[isleap(tm->tm_year +
 650                             TM_YEAR_BASE)][i])
 651                                 i++;
 652                         if (i > 12) {
 653                                 i = 1;
 654                                 tm->tm_yday -=
 655                                     start_of_month[isleap(tm->tm_year +
 656                                     TM_YEAR_BASE)][12];
 657                                 tm->tm_year++;
 658                         }
 659                         tm->tm_mon = i - 1;
 660                         flags |= FLAG_MONTH;
 661                 }
 662                 if (!(flags & FLAG_MDAY)) {
 663                         tm->tm_mday = tm->tm_yday -
 664                             start_of_month[isleap(tm->tm_year + TM_YEAR_BASE)]
 665                             [tm->tm_mon] + 1;
 666                         flags |= FLAG_MDAY;
 667                 }
 668                 if (!(flags & FLAG_WDAY)) {
 669                         i = 0;
 670                         wday_offset = first_wday_of(tm->tm_year);
 671                         while (i++ <= tm->tm_yday) {
 672                                 if (wday_offset++ >= 6)
 673                                         wday_offset = 0;
 674                         }
 675                         tm->tm_wday = wday_offset;
 676                         flags |= FLAG_WDAY;
 677                 }
 678         }
 679
 680         return ((char *)buf);
 681 }
 682
 683 char *
 684 strptime_l(const char * __restrict buf, const char * __restrict fmt,
 685     struct tm * __restrict tm, locale_t loc)
 686 {
 687         char *ret;
 688         int gmt;
 689         FIX_LOCALE(loc);
 690
 691         gmt = 0;
 692         ret = _strptime(buf, fmt, tm, &gmt, loc);
 693         if (ret && gmt) {
 694                 time_t t = timegm(tm);
 695
 696                 localtime_r(&t, tm);
 697         }
 698
 699         return (ret);
 700 }
 701
 702 char *
 703 strptime(const char * __restrict buf, const char * __restrict fmt,
 704     struct tm * __restrict tm)
 705 {
 706         return strptime_l(buf, fmt, tm, __get_locale());
 707 }