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  * @(#)strptime.c       0.1 (Powerdog) 94/03/27
  38  * @(#) Copyright (c) 1994 Powerdog Industries.  All rights reserved.
  39  * $FreeBSD: head/lib/libc/stdtime/strptime.c 272679 2014-10-07 06:34:05Z ache $
  40  */
  41
  42 #include "namespace.h"
  43 #include <time.h>
  44 #include <ctype.h>
  45 #include <errno.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include "un-namespace.h"
  49 #include "libc_private.h"
  50 #include "timelocal.h"
  51 #include "tzfile.h"
  52
  53 static char * _strptime(const char *, const char *, struct tm *, int *, locale_t);
  54
  55 #define asizeof(a)      (sizeof(a) / sizeof((a)[0]))
  56
  57 #define FLAG_NONE       (1 << 0)
  58 #define FLAG_YEAR       (1 << 1)
  59 #define FLAG_MONTH      (1 << 2)
  60 #define FLAG_YDAY       (1 << 3)
  61 #define FLAG_MDAY       (1 << 4)
  62 #define FLAG_WDAY       (1 << 5)
  63
  64 /*
  65  * Calculate the week day of the first day of a year. Valid for
  66  * the Gregorian calendar, which began Sept 14, 1752 in the UK
  67  * and its colonies. Ref:
  68  * http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week
  69  */
  70
  71 static int
  72 first_wday_of(int year)
  73 {
  74         return (((2 * (3 - (year / 100) % 4)) + (year % 100) +
  75                 ((year % 100) / 4) + (isleap(year) ? 6 : 0) + 1) % 7);
  76 }
  77
  78 static char *
  79 _strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp,
  80                 locale_t locale)
  81 {
  82         char    c;
  83         const char *ptr;
  84         int     day_offset = -1, wday_offset;
  85         int week_offset;
  86         int     i, len;
  87         int flags;
  88         int Ealternative, Oalternative;
  89         const struct lc_time_T *tptr = __get_current_time_locale(locale);
  90         static int start_of_month[2][13] = {
  91                 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
  92                 {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
  93         };
  94
  95         flags = FLAG_NONE;
  96
  97         ptr = fmt;
  98         while (*ptr != 0) {
  99                 c = *ptr++;
 100
 101                 if (c != '%') {
 102                         if (isspace_l((unsigned char)c, locale))
 103                                 while (*buf != 0 &&
 104                                        isspace_l((unsigned char)*buf, locale))
 105                                         buf++;
 106                         else if (c != *buf++)
 107                                 return (NULL);
 108                         continue;
 109                 }
 110
 111                 Ealternative = 0;
 112                 Oalternative = 0;
 113 label:
 114                 c = *ptr++;
 115                 switch (c) {
 116                 case '%':
 117                         if (*buf++ != '%')
 118                                 return (NULL);
 119                         break;
 120
 121                 case '+':
 122                         buf = _strptime(buf, tptr->date_fmt, tm, GMTp, locale);
 123                         if (buf == NULL)
 124                                 return (NULL);
 125                         flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 126                         break;
 127
 128                 case 'C':
 129                         if (!isdigit_l((unsigned char)*buf, locale))
 130                                 return (NULL);
 131
 132                         /* XXX This will break for 3-digit centuries. */
 133                         len = 2;
 134                         for (i = 0; len && *buf != 0 &&
 135                              isdigit_l((unsigned char)*buf, locale); buf++) {
 136                                 i *= 10;
 137                                 i += *buf - '0';
 138                                 len--;
 139                         }
 140                         if (i < 19)
 141                                 return (NULL);
 142
 143                         tm->tm_year = i * 100 - TM_YEAR_BASE;
 144                         flags |= FLAG_YEAR;
 145
 146                         break;
 147
 148                 case 'c':
 149                         buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale);
 150                         if (buf == NULL)
 151                                 return (NULL);
 152                         flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 153                         break;
 154
 155                 case 'D':
 156                         buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale);
 157                         if (buf == NULL)
 158                                 return (NULL);
 159                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 160                         break;
 161
 162                 case 'E':
 163                         if (Ealternative || Oalternative)
 164                                 break;
 165                         Ealternative++;
 166                         goto label;
 167
 168                 case 'O':
 169                         if (Ealternative || Oalternative)
 170                                 break;
 171                         Oalternative++;
 172                         goto label;
 173
 174                 case 'F':
 175                         buf = _strptime(buf, "%Y-%m-%d", tm, GMTp, locale);
 176                         if (buf == NULL)
 177                                 return (NULL);
 178                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 179                         break;
 180
 181                 case 'R':
 182                         buf = _strptime(buf, "%H:%M", tm, GMTp, locale);
 183                         if (buf == NULL)
 184                                 return (NULL);
 185                         break;
 186
 187                 case 'r':
 188                         buf = _strptime(buf, tptr->ampm_fmt, tm, GMTp, locale);
 189                         if (buf == NULL)
 190                                 return (NULL);
 191                         break;
 192
 193                 case 'T':
 194                         buf = _strptime(buf, "%H:%M:%S", tm, GMTp, locale);
 195                         if (buf == NULL)
 196                                 return (NULL);
 197                         break;
 198
 199                 case 'X':
 200                         buf = _strptime(buf, tptr->X_fmt, tm, GMTp, locale);
 201                         if (buf == NULL)
 202                                 return (NULL);
 203                         break;
 204
 205                 case 'x':
 206                         buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale);
 207                         if (buf == NULL)
 208                                 return (NULL);
 209                         flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
 210                         break;
 211
 212                 case 'j':
 213                         if (!isdigit_l((unsigned char)*buf, locale))
 214                                 return (NULL);
 215
 216                         len = 3;
 217                         for (i = 0; len && *buf != 0 &&
 218                              isdigit_l((unsigned char)*buf, locale); buf++){
 219                                 i *= 10;
 220                                 i += *buf - '0';
 221                                 len--;
 222                         }
 223                         if (i < 1 || i > 366)
 224                                 return (NULL);
 225
 226                         tm->tm_yday = i - 1;
 227                         flags |= FLAG_YDAY;
 228
 229                         break;
 230
 231                 case 'M':
 232                 case 'S':
 233                         if (*buf == 0 ||
 234                                 isspace_l((unsigned char)*buf, locale))
 235                                 break;
 236
 237                         if (!isdigit_l((unsigned char)*buf, locale))
 238                                 return (NULL);
 239
 240                         len = 2;
 241                         for (i = 0; len && *buf != 0 &&
 242                                 isdigit_l((unsigned char)*buf, locale); buf++){
 243                                 i *= 10;
 244                                 i += *buf - '0';
 245                                 len--;
 246                         }
 247
 248                         if (c == 'M') {
 249                                 if (i > 59)
 250                                         return (NULL);
 251                                 tm->tm_min = i;
 252                         } else {
 253                                 if (i > 60)
 254                                         return (NULL);
 255                                 tm->tm_sec = i;
 256                         }
 257
 258                         break;
 259
 260                 case 'H':
 261                 case 'I':
 262                 case 'k':
 263                 case 'l':
 264                         /*
 265                          * Of these, %l is the only specifier explicitly
 266                          * documented as not being zero-padded.  However,
 267                          * there is no harm in allowing zero-padding.
 268                          *
 269                          * XXX The %l specifier may gobble one too many
 270                          * digits if used incorrectly.
 271                          */
 272                         if (!isdigit_l((unsigned char)*buf, locale))
 273                                 return (NULL);
 274
 275                         len = 2;
 276                         for (i = 0; len && *buf != 0 &&
 277                              isdigit_l((unsigned char)*buf, locale); buf++) {
 278                                 i *= 10;
 279                                 i += *buf - '0';
 280                                 len--;
 281                         }
 282                         if (c == 'H' || c == 'k') {
 283                                 if (i > 23)
 284                                         return (NULL);
 285                         } else if (i > 12)
 286                                 return (NULL);
 287
 288                         tm->tm_hour = i;
 289
 290                         break;
 291
 292                 case 'p':
 293                         /*
 294                          * XXX This is bogus if parsed before hour-related
 295                          * specifiers.
 296                          */
 297                         len = strlen(tptr->am);
 298                         if (strncasecmp_l(buf, tptr->am, len, locale) == 0) {
 299                                 if (tm->tm_hour > 12)
 300                                         return (NULL);
 301                                 if (tm->tm_hour == 12)
 302                                         tm->tm_hour = 0;
 303                                 buf += len;
 304                                 break;
 305                         }
 306
 307                         len = strlen(tptr->pm);
 308                         if (strncasecmp_l(buf, tptr->pm, len, locale) == 0) {
 309                                 if (tm->tm_hour > 12)
 310                                         return (NULL);
 311                                 if (tm->tm_hour != 12)
 312                                         tm->tm_hour += 12;
 313                                 buf += len;
 314                                 break;
 315                         }
 316
 317                         return (NULL);
 318
 319                 case 'A':
 320                 case 'a':
 321                         for (i = 0; i < asizeof(tptr->weekday); i++) {
 322                                 len = strlen(tptr->weekday[i]);
 323                                 if (strncasecmp_l(buf, tptr->weekday[i],
 324                                                 len, locale) == 0)
 325                                         break;
 326                                 len = strlen(tptr->wday[i]);
 327                                 if (strncasecmp_l(buf, tptr->wday[i],
 328                                                 len, locale) == 0)
 329                                         break;
 330                         }
 331                         if (i == asizeof(tptr->weekday))
 332                                 return (NULL);
 333
 334                         buf += len;
 335                         tm->tm_wday = i;
 336                         flags |= FLAG_WDAY;
 337                         break;
 338
 339                 case 'U':
 340                 case 'W':
 341                         /*
 342                          * XXX This is bogus, as we can not assume any valid
 343                          * information present in the tm structure at this
 344                          * point to calculate a real value, so just check the
 345                          * range for now.
 346                          */
 347                         if (!isdigit_l((unsigned char)*buf, locale))
 348                                 return (NULL);
 349
 350                         len = 2;
 351                         for (i = 0; len && *buf != 0 &&
 352                              isdigit_l((unsigned char)*buf, locale); buf++) {
 353                                 i *= 10;
 354                                 i += *buf - '0';
 355                                 len--;
 356                         }
 357                         if (i > 53)
 358                                 return (NULL);
 359
 360                         if (c == 'U')
 361                                 day_offset = TM_SUNDAY;
 362                         else
 363                                 day_offset = TM_MONDAY;
 364
 365
 366                         week_offset = i;
 367
 368                         break;
 369
 370                 case 'w':
 371                         if (!isdigit_l((unsigned char)*buf, locale))
 372                                 return (NULL);
 373
 374                         i = *buf - '0';
 375                         buf++;
 376                         if (i > 6)
 377                                 return (NULL);
 378
 379                         tm->tm_wday = i;
 380                         flags |= FLAG_WDAY;
 381
 382                         break;
 383
 384                 case 'e':
 385                         /*
 386                          * With %e format, our strftime(3) adds a blank space
 387                          * before single digits.
 388                          */
 389                         if (*buf != 0 &&
 390                             isspace_l((unsigned char)*buf, locale))
 391                                buf++;
 392                         /* FALLTHROUGH */
 393                 case 'd':
 394                         /*
 395                          * The %e specifier was once explicitly documented as
 396                          * not being zero-padded but was later changed to
 397                          * equivalent to %d.  There is no harm in allowing
 398                          * such padding.
 399                          *
 400                          * XXX The %e specifier may gobble one too many
 401                          * digits if used incorrectly.
 402                          */
 403                         if (!isdigit_l((unsigned char)*buf, locale))
 404                                 return (NULL);
 405
 406                         len = 2;
 407                         for (i = 0; len && *buf != 0 &&
 408                              isdigit_l((unsigned char)*buf, locale); buf++) {
 409                                 i *= 10;
 410                                 i += *buf - '0';
 411                                 len--;
 412                         }
 413                         if (i > 31)
 414                                 return (NULL);
 415
 416                         tm->tm_mday = i;
 417                         flags |= FLAG_MDAY;
 418
 419                         break;
 420
 421                 case 'B':
 422                 case 'b':
 423                 case 'h':
 424                         for (i = 0; i < asizeof(tptr->month); i++) {
 425                                 if (Oalternative) {
 426                                         if (c == 'B') {
 427                                                 len = strlen(tptr->alt_month[i]);
 428                                                 if (strncasecmp_l(buf,
 429                                                                 tptr->alt_month[i],
 430                                                                 len, locale) == 0)
 431                                                         break;
 432                                         }
 433                                 } else {
 434                                         len = strlen(tptr->month[i]);
 435                                         if (strncasecmp_l(buf, tptr->month[i],
 436                                                         len, locale) == 0)
 437                                                 break;
 438                                 }
 439                         }
 440                         /*
 441                          * Try the abbreviated month name if the full name
 442                          * wasn't found and Oalternative was not requested.
 443                          */
 444                         if (i == asizeof(tptr->month) && !Oalternative) {
 445                                 for (i = 0; i < asizeof(tptr->month); i++) {
 446                                         len = strlen(tptr->mon[i]);
 447                                         if (strncasecmp_l(buf, tptr->mon[i],
 448                                                         len, locale) == 0)
 449                                                 break;
 450                                 }
 451                         }
 452                         if (i == asizeof(tptr->month))
 453                                 return (NULL);
 454
 455                         tm->tm_mon = i;
 456                         buf += len;
 457                         flags |= FLAG_MONTH;
 458
 459                         break;
 460
 461                 case 'm':
 462                         if (!isdigit_l((unsigned char)*buf, locale))
 463                                 return (NULL);
 464
 465                         len = 2;
 466                         for (i = 0; len && *buf != 0 &&
 467                              isdigit_l((unsigned char)*buf, locale); buf++) {
 468                                 i *= 10;
 469                                 i += *buf - '0';
 470                                 len--;
 471                         }
 472                         if (i < 1 || i > 12)
 473                                 return (NULL);
 474
 475                         tm->tm_mon = i - 1;
 476                         flags |= FLAG_MONTH;
 477
 478                         break;
 479
 480                 case 's':
 481                         {
 482                         char *cp;
 483                         int sverrno;
 484                         long n;
 485                         time_t t;
 486
 487                         sverrno = errno;
 488                         errno = 0;
 489                         n = strtol_l(buf, &cp, 10, locale);
 490                         if (errno == ERANGE || (long)(t = n) != n) {
 491                                 errno = sverrno;
 492                                 return (NULL);
 493                         }
 494                         errno = sverrno;
 495                         buf = cp;
 496                         if (gmtime_r(&t, tm) == NULL)
 497                                 return (NULL);
 498                         *GMTp = 1;
 499                         flags |= FLAG_YDAY | FLAG_WDAY | FLAG_MONTH |
 500                             FLAG_MDAY | FLAG_YEAR;
 501                         }
 502                         break;
 503
 504                 case 'Y':
 505                 case 'y':
 506                         if (*buf == 0 ||
 507                             isspace_l((unsigned char)*buf, locale))
 508                                 break;
 509
 510                         if (!isdigit_l((unsigned char)*buf, locale))
 511                                 return (NULL);
 512
 513                         len = (c == 'Y') ? 4 : 2;
 514                         for (i = 0; len && *buf != 0 &&
 515                              isdigit_l((unsigned char)*buf, locale); buf++) {
 516                                 i *= 10;
 517                                 i += *buf - '0';
 518                                 len--;
 519                         }
 520                         if (c == 'Y')
 521                                 i -= TM_YEAR_BASE;
 522                         if (c == 'y' && i < 69)
 523                                 i += 100;
 524                         if (i < 0)
 525                                 return (NULL);
 526
 527                         tm->tm_year = i;
 528                         flags |= FLAG_YEAR;
 529
 530                         break;
 531
 532                 case 'Z':
 533                         {
 534                         const char *cp;
 535                         char *zonestr;
 536
 537                         for (cp = buf; *cp &&
 538                              isupper_l((unsigned char)*cp, locale); ++cp) {
 539                                 /*empty*/}
 540                         if (cp - buf) {
 541                                 zonestr = alloca(cp - buf + 1);
 542                                 strncpy(zonestr, buf, cp - buf);
 543                                 zonestr[cp - buf] = '\0';
 544                                 tzset();
 545                                 if (0 == strcmp(zonestr, "GMT") ||
 546                                     0 == strcmp(zonestr, "UTC")) {
 547                                     *GMTp = 1;
 548                                 } else if (0 == strcmp(zonestr, tzname[0])) {
 549                                     tm->tm_isdst = 0;
 550                                 } else if (0 == strcmp(zonestr, tzname[1])) {
 551                                     tm->tm_isdst = 1;
 552                                 } else {
 553                                     return (NULL);
 554                                 }
 555                                 buf += cp - buf;
 556                         }
 557                         }
 558                         break;
 559
 560                 case 'z':
 561                         {
 562                         int sign = 1;
 563                         len = 4;                        /* RFC 822/ISO 8601 */
 564
 565                         if (*buf != '+') {
 566                                 if (*buf == '-')
 567                                         sign = -1;
 568                                 else if (*buf == 'Z')   /* ISO 8601 Z (UTC) */
 569                                         len = 0;
 570                                 else
 571                                         return (NULL);
 572                         }
 573
 574                         buf++;
 575                         i = 0;
 576                         for (; len > 0; len--) {
 577                                 if (isdigit_l((unsigned char)*buf, locale)) {
 578                                         i *= 10;
 579                                         i += *buf - '0';
 580                                         buf++;
 581                                 } else if (*buf == ':' && len == 2) {
 582                                         buf++;          /* ISO 8601 +hh:mm */
 583                                         if (isdigit_l((unsigned char)*buf,
 584                                             locale)) {
 585                                                 i *= 10;
 586                                                 i += *buf - '0';
 587                                                 buf++;
 588                                         } else {
 589                                                 return (NULL);
 590                                         }
 591                                 } else if (len == 2) {
 592                                         i *= 100;       /* ISO 8601 +hh */
 593                                         break;
 594                                 } else {
 595                                         return (NULL);
 596                                 }
 597                         }
 598
 599                         tm->tm_hour -= sign * (i / 100);
 600                         tm->tm_min  -= sign * (i % 100);
 601                         *GMTp = 1;
 602                         }
 603                         break;
 604
 605                 case 'n':
 606                 case 't':
 607                         while (isspace_l((unsigned char)*buf, locale))
 608                                 buf++;
 609                         break;
 610
 611                 default:
 612                         return (NULL);
 613                 }
 614         }
 615
 616         if (!(flags & FLAG_YDAY) && (flags & FLAG_YEAR)) {
 617                 if ((flags & (FLAG_MONTH | FLAG_MDAY)) ==
 618                     (FLAG_MONTH | FLAG_MDAY)) {
 619                         tm->tm_yday = start_of_month[isleap(tm->tm_year +
 620                             TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1);
 621                         flags |= FLAG_YDAY;
 622                 } else if (day_offset != -1) {
 623                         /* Set the date to the first Sunday (or Monday)
 624                          * of the specified week of the year.
 625                          */
 626                         if (!(flags & FLAG_WDAY)) {
 627                                 tm->tm_wday = day_offset;
 628                                 flags |= FLAG_WDAY;
 629                         }
 630                         tm->tm_yday = (7 -
 631                             first_wday_of(tm->tm_year + TM_YEAR_BASE) +
 632                             day_offset) % 7 + (week_offset - 1 +
 633                             (tm->tm_wday == 0 ? day_offset : 0)) * 7 +
 634                             tm->tm_wday - day_offset;
 635                         flags |= FLAG_YDAY;
 636                 }
 637         }
 638
 639         if ((flags & (FLAG_YEAR | FLAG_YDAY)) == (FLAG_YEAR | FLAG_YDAY)) {
 640                 if (!(flags & FLAG_MONTH)) {
 641                         i = 0;
 642                         while (tm->tm_yday >=
 643                             start_of_month[isleap(tm->tm_year +
 644                             TM_YEAR_BASE)][i])
 645                                 i++;
 646                         if (i > 12) {
 647                                 i = 1;
 648                                 tm->tm_yday -=
 649                                     start_of_month[isleap(tm->tm_year +
 650                                     TM_YEAR_BASE)][12];
 651                                 tm->tm_year++;
 652                         }
 653                         tm->tm_mon = i - 1;
 654                         flags |= FLAG_MONTH;
 655                 }
 656                 if (!(flags & FLAG_MDAY)) {
 657                         tm->tm_mday = tm->tm_yday -
 658                             start_of_month[isleap(tm->tm_year + TM_YEAR_BASE)]
 659                             [tm->tm_mon] + 1;
 660                         flags |= FLAG_MDAY;
 661                 }
 662                 if (!(flags & FLAG_WDAY)) {
 663                         i = 0;
 664                         wday_offset = first_wday_of(tm->tm_year);
 665                         while (i++ <= tm->tm_yday) {
 666                                 if (wday_offset++ >= 6)
 667                                         wday_offset = 0;
 668                         }
 669                         tm->tm_wday = wday_offset;
 670                         flags |= FLAG_WDAY;
 671                 }
 672         }
 673
 674         return ((char *)buf);
 675 }
 676
 677 char *
 678 strptime_l(const char * __restrict buf, const char * __restrict fmt,
 679     struct tm * __restrict tm, locale_t loc)
 680 {
 681         char *ret;
 682         int gmt;
 683         FIX_LOCALE(loc);
 684
 685         gmt = 0;
 686         ret = _strptime(buf, fmt, tm, &gmt, loc);
 687         if (ret && gmt) {
 688                 time_t t = timegm(tm);
 689
 690                 localtime_r(&t, tm);
 691         }
 692
 693         return (ret);
 694 }
 695
 696 char *
 697 strptime(const char * __restrict buf, const char * __restrict fmt,
 698     struct tm * __restrict tm)
 699 {
 700         return strptime_l(buf, fmt, tm, __get_locale());
 701 }