1#ifndef lint 2#ifndef NOID 3static char elsieid[] = "@(#)strftime.c 8.1"; 4/* 5** Based on the UCB version with the ID appearing below. 6** This is ANSIish only when "multibyte character == plain character". 7*/ 8#endif /* !defined NOID */ 9#endif /* !defined lint */ 10 11#include <stdio.h> 12#include <time.h> 13#include <tzfile.h> 14#include <limits.h> 15#include <cutils/tztime.h> 16 17/* 18** Copyright (c) 1989 The Regents of the University of California. 19** All rights reserved. 20** 21** Redistribution and use in source and binary forms are permitted 22** provided that the above copyright notice and this paragraph are 23** duplicated in all such forms and that any documentation, 24** advertising materials, and other materials related to such 25** distribution and use acknowledge that the software was developed 26** by the University of California, Berkeley. The name of the 27** University may not be used to endorse or promote products derived 28** from this software without specific prior written permission. 29** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 30** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 31** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 32*/ 33 34#ifndef LIBC_SCCS 35#ifndef lint 36static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; 37#endif /* !defined lint */ 38#endif /* !defined LIBC_SCCS */ 39 40#include <ctype.h> 41 42#define P(x) x 43 44static char * _add P((const char *, char *, const char *, int)); 45static char * _conv P((int, const char *, char *, const char *)); 46static char * _fmt P((const char *, const struct tm *, char *, const char *, 47 int *, const struct strftime_locale *Locale)); 48static char * _yconv P((int, int, int, int, char *, const char *, int)); 49static char * getformat P((int, char *, char *, char *, char *)); 50 51extern char * tzname[]; 52 53 54 55 56 57/* from private.h */ 58 59#ifndef TYPE_BIT 60#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) 61#endif /* !defined TYPE_BIT */ 62 63#ifndef TYPE_SIGNED 64#define TYPE_SIGNED(type) (((type) -1) < 0) 65#endif /* !defined TYPE_SIGNED */ 66 67#ifndef INT_STRLEN_MAXIMUM 68/* 69 * ** 302 / 1000 is log10(2.0) rounded up. 70 * ** Subtract one for the sign bit if the type is signed; 71 * ** add one for integer division truncation; 72 * ** add one more for a minus sign if the type is signed. 73 * */ 74#define INT_STRLEN_MAXIMUM(type) \ 75 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + \ 76 1 + TYPE_SIGNED(type)) 77#endif /* !defined INT_STRLEN_MAXIMUM */ 78 79/* end of part from private.h */ 80 81 82 83 84#ifndef YEAR_2000_NAME 85#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" 86#endif /* !defined YEAR_2000_NAME */ 87 88#define IN_NONE 0 89#define IN_SOME 1 90#define IN_THIS 2 91#define IN_ALL 3 92 93#define FORCE_LOWER_CASE 0x100 94 95size_t 96strftime_tz(s, maxsize, format, t, Locale) 97char * const s; 98const size_t maxsize; 99const char * const format; 100const struct tm * const t; 101const struct strftime_locale *Locale; 102{ 103 char * p; 104 int warn; 105 106 warn = IN_NONE; 107 p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn, Locale); 108#if 0 109 if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) { 110 (void) fprintf(stderr, "\n"); 111 if (format == NULL) 112 (void) fprintf(stderr, "NULL strftime format "); 113 else (void) fprintf(stderr, "strftime format \"%s\" ", 114 format); 115 (void) fprintf(stderr, "yields only two digits of years in "); 116 if (warn == IN_SOME) 117 (void) fprintf(stderr, "some locales"); 118 else if (warn == IN_THIS) 119 (void) fprintf(stderr, "the current locale"); 120 else (void) fprintf(stderr, "all locales"); 121 (void) fprintf(stderr, "\n"); 122 } 123#endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */ 124 if (p == s + maxsize) 125 return 0; 126 *p = '\0'; 127 return p - s; 128} 129 130static char *getformat(int modifier, char *normal, char *underscore, 131 char *dash, char *zero) { 132 switch (modifier) { 133 case '_': 134 return underscore; 135 136 case '-': 137 return dash; 138 139 case '0': 140 return zero; 141 } 142 143 return normal; 144} 145 146static char * 147_fmt(format, t, pt, ptlim, warnp, Locale) 148const char * format; 149const struct tm * const t; 150char * pt; 151const char * const ptlim; 152int * warnp; 153const struct strftime_locale *Locale; 154{ 155 for ( ; *format; ++format) { 156 if (*format == '%') { 157 int modifier = 0; 158label: 159 switch (*++format) { 160 case '\0': 161 --format; 162 break; 163 case 'A': 164 pt = _add((t->tm_wday < 0 || 165 t->tm_wday >= DAYSPERWEEK) ? 166 "?" : Locale->weekday[t->tm_wday], 167 pt, ptlim, modifier); 168 continue; 169 case 'a': 170 pt = _add((t->tm_wday < 0 || 171 t->tm_wday >= DAYSPERWEEK) ? 172 "?" : Locale->wday[t->tm_wday], 173 pt, ptlim, modifier); 174 continue; 175 case 'B': 176 if (modifier == '-') { 177 pt = _add((t->tm_mon < 0 || 178 t->tm_mon >= MONSPERYEAR) ? 179 "?" : Locale->standalone_month[t->tm_mon], 180 pt, ptlim, modifier); 181 } else { 182 pt = _add((t->tm_mon < 0 || 183 t->tm_mon >= MONSPERYEAR) ? 184 "?" : Locale->month[t->tm_mon], 185 pt, ptlim, modifier); 186 } 187 continue; 188 case 'b': 189 case 'h': 190 pt = _add((t->tm_mon < 0 || 191 t->tm_mon >= MONSPERYEAR) ? 192 "?" : Locale->mon[t->tm_mon], 193 pt, ptlim, modifier); 194 continue; 195 case 'C': 196 /* 197 ** %C used to do a... 198 ** _fmt("%a %b %e %X %Y", t); 199 ** ...whereas now POSIX 1003.2 calls for 200 ** something completely different. 201 ** (ado, 1993-05-24) 202 */ 203 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0, 204 pt, ptlim, modifier); 205 continue; 206 case 'c': 207 { 208 int warn2 = IN_SOME; 209 210 pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp, Locale); 211 if (warn2 == IN_ALL) 212 warn2 = IN_THIS; 213 if (warn2 > *warnp) 214 *warnp = warn2; 215 } 216 continue; 217 case 'D': 218 pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp, Locale); 219 continue; 220 case 'd': 221 pt = _conv(t->tm_mday, 222 getformat(modifier, "%02d", 223 "%2d", "%d", "%02d"), 224 pt, ptlim); 225 continue; 226 case 'E': 227 case 'O': 228 /* 229 ** C99 locale modifiers. 230 ** The sequences 231 ** %Ec %EC %Ex %EX %Ey %EY 232 ** %Od %oe %OH %OI %Om %OM 233 ** %OS %Ou %OU %OV %Ow %OW %Oy 234 ** are supposed to provide alternate 235 ** representations. 236 */ 237 goto label; 238 case '_': 239 case '-': 240 case '0': 241 case '^': 242 case '#': 243 modifier = *format; 244 goto label; 245 case 'e': 246 pt = _conv(t->tm_mday, 247 getformat(modifier, "%2d", 248 "%2d", "%d", "%02d"), 249 pt, ptlim); 250 continue; 251 case 'F': 252 pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp, Locale); 253 continue; 254 case 'H': 255 pt = _conv(t->tm_hour, 256 getformat(modifier, "%02d", 257 "%2d", "%d", "%02d"), 258 pt, ptlim); 259 continue; 260 case 'I': 261 pt = _conv((t->tm_hour % 12) ? 262 (t->tm_hour % 12) : 12, 263 getformat(modifier, "%02d", 264 "%2d", "%d", "%02d"), 265 pt, ptlim); 266 continue; 267 case 'j': 268 pt = _conv(t->tm_yday + 1, 269 getformat(modifier, "%03d", "%3d", "%d", "%03d"), 270 pt, ptlim); 271 continue; 272 case 'k': 273 /* 274 ** This used to be... 275 ** _conv(t->tm_hour % 12 ? 276 ** t->tm_hour % 12 : 12, 2, ' '); 277 ** ...and has been changed to the below to 278 ** match SunOS 4.1.1 and Arnold Robbins' 279 ** strftime version 3.0. That is, "%k" and 280 ** "%l" have been swapped. 281 ** (ado, 1993-05-24) 282 */ 283 pt = _conv(t->tm_hour, 284 getformat(modifier, "%2d", 285 "%2d", "%d", "%02d"), 286 pt, ptlim); 287 continue; 288#ifdef KITCHEN_SINK 289 case 'K': 290 /* 291 ** After all this time, still unclaimed! 292 */ 293 pt = _add("kitchen sink", pt, ptlim, modifier); 294 continue; 295#endif /* defined KITCHEN_SINK */ 296 case 'l': 297 /* 298 ** This used to be... 299 ** _conv(t->tm_hour, 2, ' '); 300 ** ...and has been changed to the below to 301 ** match SunOS 4.1.1 and Arnold Robbin's 302 ** strftime version 3.0. That is, "%k" and 303 ** "%l" have been swapped. 304 ** (ado, 1993-05-24) 305 */ 306 pt = _conv((t->tm_hour % 12) ? 307 (t->tm_hour % 12) : 12, 308 getformat(modifier, "%2d", 309 "%2d", "%d", "%02d"), 310 pt, ptlim); 311 continue; 312 case 'M': 313 pt = _conv(t->tm_min, 314 getformat(modifier, "%02d", 315 "%2d", "%d", "%02d"), 316 pt, ptlim); 317 continue; 318 case 'm': 319 pt = _conv(t->tm_mon + 1, 320 getformat(modifier, "%02d", 321 "%2d", "%d", "%02d"), 322 pt, ptlim); 323 continue; 324 case 'n': 325 pt = _add("\n", pt, ptlim, modifier); 326 continue; 327 case 'p': 328 pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? 329 Locale->pm : 330 Locale->am, 331 pt, ptlim, modifier); 332 continue; 333 case 'P': 334 pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? 335 Locale->pm : 336 Locale->am, 337 pt, ptlim, FORCE_LOWER_CASE); 338 continue; 339 case 'R': 340 pt = _fmt("%H:%M", t, pt, ptlim, warnp, Locale); 341 continue; 342 case 'r': 343 pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp, Locale); 344 continue; 345 case 'S': 346 pt = _conv(t->tm_sec, 347 getformat(modifier, "%02d", 348 "%2d", "%d", "%02d"), 349 pt, ptlim); 350 continue; 351 case 's': 352 { 353 struct tm tm; 354 char buf[INT_STRLEN_MAXIMUM( 355 time_t) + 1]; 356 time_t mkt; 357 358 tm = *t; 359 mkt = mktime(&tm); 360 if (TYPE_SIGNED(time_t)) 361 (void) sprintf(buf, "%ld", 362 (long) mkt); 363 else (void) sprintf(buf, "%lu", 364 (unsigned long) mkt); 365 pt = _add(buf, pt, ptlim, modifier); 366 } 367 continue; 368 case 'T': 369 pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp, Locale); 370 continue; 371 case 't': 372 pt = _add("\t", pt, ptlim, modifier); 373 continue; 374 case 'U': 375 pt = _conv((t->tm_yday + DAYSPERWEEK - 376 t->tm_wday) / DAYSPERWEEK, 377 getformat(modifier, "%02d", 378 "%2d", "%d", "%02d"), 379 pt, ptlim); 380 continue; 381 case 'u': 382 /* 383 ** From Arnold Robbins' strftime version 3.0: 384 ** "ISO 8601: Weekday as a decimal number 385 ** [1 (Monday) - 7]" 386 ** (ado, 1993-05-24) 387 */ 388 pt = _conv((t->tm_wday == 0) ? 389 DAYSPERWEEK : t->tm_wday, "%d", pt, ptlim); 390 continue; 391 case 'V': /* ISO 8601 week number */ 392 case 'G': /* ISO 8601 year (four digits) */ 393 case 'g': /* ISO 8601 year (two digits) */ 394/* 395** From Arnold Robbins' strftime version 3.0: "the week number of the 396** year (the first Monday as the first day of week 1) as a decimal number 397** (01-53)." 398** (ado, 1993-05-24) 399** 400** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn: 401** "Week 01 of a year is per definition the first week which has the 402** Thursday in this year, which is equivalent to the week which contains 403** the fourth day of January. In other words, the first week of a new year 404** is the week which has the majority of its days in the new year. Week 01 405** might also contain days from the previous year and the week before week 406** 01 of a year is the last week (52 or 53) of the previous year even if 407** it contains days from the new year. A week starts with Monday (day 1) 408** and ends with Sunday (day 7). For example, the first week of the year 409** 1997 lasts from 1996-12-30 to 1997-01-05..." 410** (ado, 1996-01-02) 411*/ 412 { 413 int year; 414 int base; 415 int yday; 416 int wday; 417 int w; 418 419 year = t->tm_year; 420 base = TM_YEAR_BASE; 421 yday = t->tm_yday; 422 wday = t->tm_wday; 423 for ( ; ; ) { 424 int len; 425 int bot; 426 int top; 427 428 len = isleap_sum(year, base) ? 429 DAYSPERLYEAR : 430 DAYSPERNYEAR; 431 /* 432 ** What yday (-3 ... 3) does 433 ** the ISO year begin on? 434 */ 435 bot = ((yday + 11 - wday) % 436 DAYSPERWEEK) - 3; 437 /* 438 ** What yday does the NEXT 439 ** ISO year begin on? 440 */ 441 top = bot - 442 (len % DAYSPERWEEK); 443 if (top < -3) 444 top += DAYSPERWEEK; 445 top += len; 446 if (yday >= top) { 447 ++base; 448 w = 1; 449 break; 450 } 451 if (yday >= bot) { 452 w = 1 + ((yday - bot) / 453 DAYSPERWEEK); 454 break; 455 } 456 --base; 457 yday += isleap_sum(year, base) ? 458 DAYSPERLYEAR : 459 DAYSPERNYEAR; 460 } 461#ifdef XPG4_1994_04_09 462 if ((w == 52 && 463 t->tm_mon == TM_JANUARY) || 464 (w == 1 && 465 t->tm_mon == TM_DECEMBER)) 466 w = 53; 467#endif /* defined XPG4_1994_04_09 */ 468 if (*format == 'V') 469 pt = _conv(w, 470 getformat(modifier, 471 "%02d", 472 "%2d", 473 "%d", 474 "%02d"), 475 pt, ptlim); 476 else if (*format == 'g') { 477 *warnp = IN_ALL; 478 pt = _yconv(year, base, 0, 1, 479 pt, ptlim, modifier); 480 } else pt = _yconv(year, base, 1, 1, 481 pt, ptlim, modifier); 482 } 483 continue; 484 case 'v': 485 /* 486 ** From Arnold Robbins' strftime version 3.0: 487 ** "date as dd-bbb-YYYY" 488 ** (ado, 1993-05-24) 489 */ 490 pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp, Locale); 491 continue; 492 case 'W': 493 pt = _conv((t->tm_yday + DAYSPERWEEK - 494 (t->tm_wday ? 495 (t->tm_wday - 1) : 496 (DAYSPERWEEK - 1))) / DAYSPERWEEK, 497 getformat(modifier, "%02d", 498 "%2d", "%d", "%02d"), 499 pt, ptlim); 500 continue; 501 case 'w': 502 pt = _conv(t->tm_wday, "%d", pt, ptlim); 503 continue; 504 case 'X': 505 pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp, Locale); 506 continue; 507 case 'x': 508 { 509 int warn2 = IN_SOME; 510 511 pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2, Locale); 512 if (warn2 == IN_ALL) 513 warn2 = IN_THIS; 514 if (warn2 > *warnp) 515 *warnp = warn2; 516 } 517 continue; 518 case 'y': 519 *warnp = IN_ALL; 520 pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1, 521 pt, ptlim, modifier); 522 continue; 523 case 'Y': 524 pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1, 525 pt, ptlim, modifier); 526 continue; 527 case 'Z': 528#ifdef TM_ZONE 529 if (t->TM_ZONE != NULL) 530 pt = _add(t->TM_ZONE, pt, ptlim, 531 modifier); 532 else 533#endif /* defined TM_ZONE */ 534 if (t->tm_isdst >= 0) 535 pt = _add(tzname[t->tm_isdst != 0], 536 pt, ptlim, modifier); 537 /* 538 ** C99 says that %Z must be replaced by the 539 ** empty string if the time zone is not 540 ** determinable. 541 */ 542 continue; 543 case 'z': 544 { 545 int diff; 546 char const * sign; 547 548 if (t->tm_isdst < 0) 549 continue; 550#ifdef TM_GMTOFF 551 diff = t->TM_GMTOFF; 552#else /* !defined TM_GMTOFF */ 553 /* 554 ** C99 says that the UTC offset must 555 ** be computed by looking only at 556 ** tm_isdst. This requirement is 557 ** incorrect, since it means the code 558 ** must rely on magic (in this case 559 ** altzone and timezone), and the 560 ** magic might not have the correct 561 ** offset. Doing things correctly is 562 ** tricky and requires disobeying C99; 563 ** see GNU C strftime for details. 564 ** For now, punt and conform to the 565 ** standard, even though it's incorrect. 566 ** 567 ** C99 says that %z must be replaced by the 568 ** empty string if the time zone is not 569 ** determinable, so output nothing if the 570 ** appropriate variables are not available. 571 */ 572 if (t->tm_isdst == 0) 573#ifdef USG_COMPAT 574 diff = -timezone; 575#else /* !defined USG_COMPAT */ 576 continue; 577#endif /* !defined USG_COMPAT */ 578 else 579#ifdef ALTZONE 580 diff = -altzone; 581#else /* !defined ALTZONE */ 582 continue; 583#endif /* !defined ALTZONE */ 584#endif /* !defined TM_GMTOFF */ 585 if (diff < 0) { 586 sign = "-"; 587 diff = -diff; 588 } else sign = "+"; 589 pt = _add(sign, pt, ptlim, modifier); 590 diff /= SECSPERMIN; 591 diff = (diff / MINSPERHOUR) * 100 + 592 (diff % MINSPERHOUR); 593 pt = _conv(diff, 594 getformat(modifier, "%04d", 595 "%4d", "%d", "%04d"), 596 pt, ptlim); 597 } 598 continue; 599 case '+': 600 pt = _fmt(Locale->date_fmt, t, pt, ptlim, 601 warnp, Locale); 602 continue; 603 case '%': 604 /* 605 ** X311J/88-090 (4.12.3.5): if conversion char is 606 ** undefined, behavior is undefined. Print out the 607 ** character itself as printf(3) also does. 608 */ 609 default: 610 break; 611 } 612 } 613 if (pt == ptlim) 614 break; 615 *pt++ = *format; 616 } 617 return pt; 618} 619 620static char * 621_conv(n, format, pt, ptlim) 622const int n; 623const char * const format; 624char * const pt; 625const char * const ptlim; 626{ 627 char buf[INT_STRLEN_MAXIMUM(int) + 1]; 628 629 (void) sprintf(buf, format, n); 630 return _add(buf, pt, ptlim, 0); 631} 632 633static char * 634_add(str, pt, ptlim, modifier) 635const char * str; 636char * pt; 637const char * const ptlim; 638int modifier; 639{ 640 int c; 641 642 switch (modifier) { 643 case FORCE_LOWER_CASE: 644 while (pt < ptlim && (*pt = tolower(*str++)) != '\0') { 645 ++pt; 646 } 647 break; 648 649 case '^': 650 while (pt < ptlim && (*pt = toupper(*str++)) != '\0') { 651 ++pt; 652 } 653 break; 654 655 case '#': 656 while (pt < ptlim && (c = *str++) != '\0') { 657 if (isupper(c)) { 658 c = tolower(c); 659 } else if (islower(c)) { 660 c = toupper(c); 661 } 662 *pt = c; 663 ++pt; 664 } 665 666 break; 667 668 default: 669 while (pt < ptlim && (*pt = *str++) != '\0') { 670 ++pt; 671 } 672 } 673 674 return pt; 675} 676 677/* 678** POSIX and the C Standard are unclear or inconsistent about 679** what %C and %y do if the year is negative or exceeds 9999. 680** Use the convention that %C concatenated with %y yields the 681** same output as %Y, and that %Y contains at least 4 bytes, 682** with more only if necessary. 683*/ 684 685static char * 686_yconv(a, b, convert_top, convert_yy, pt, ptlim, modifier) 687const int a; 688const int b; 689const int convert_top; 690const int convert_yy; 691char * pt; 692const char * const ptlim; 693int modifier; 694{ 695 register int lead; 696 register int trail; 697 698#define DIVISOR 100 699 trail = a % DIVISOR + b % DIVISOR; 700 lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; 701 trail %= DIVISOR; 702 if (trail < 0 && lead > 0) { 703 trail += DIVISOR; 704 --lead; 705 } else if (lead < 0 && trail > 0) { 706 trail -= DIVISOR; 707 ++lead; 708 } 709 if (convert_top) { 710 if (lead == 0 && trail < 0) 711 pt = _add("-0", pt, ptlim, modifier); 712 else pt = _conv(lead, getformat(modifier, "%02d", 713 "%2d", "%d", "%02d"), 714 pt, ptlim); 715 } 716 if (convert_yy) 717 pt = _conv(((trail < 0) ? -trail : trail), 718 getformat(modifier, "%02d", "%2d", "%d", "%02d"), 719 pt, ptlim); 720 return pt; 721} 722 723#ifdef LOCALE_HOME 724static struct lc_time_T * 725_loc P((void)) 726{ 727 static const char locale_home[] = LOCALE_HOME; 728 static const char lc_time[] = "LC_TIME"; 729 static char * locale_buf; 730 731 int fd; 732 int oldsun; /* "...ain't got nothin' to do..." */ 733 char * lbuf; 734 char * name; 735 char * p; 736 const char ** ap; 737 const char * plim; 738 char filename[FILENAME_MAX]; 739 struct stat st; 740 size_t namesize; 741 size_t bufsize; 742 743 /* 744 ** Use localebuf.mon[0] to signal whether locale is already set up. 745 */ 746 if (localebuf.mon[0]) 747 return &localebuf; 748 name = setlocale(LC_TIME, (char *) NULL); 749 if (name == NULL || *name == '\0') 750 goto no_locale; 751 /* 752 ** If the locale name is the same as our cache, use the cache. 753 */ 754 lbuf = locale_buf; 755 if (lbuf != NULL && strcmp(name, lbuf) == 0) { 756 p = lbuf; 757 for (ap = (const char **) &localebuf; 758 ap < (const char **) (&localebuf + 1); 759 ++ap) 760 *ap = p += strlen(p) + 1; 761 return &localebuf; 762 } 763 /* 764 ** Slurp the locale file into the cache. 765 */ 766 namesize = strlen(name) + 1; 767 if (sizeof filename < 768 ((sizeof locale_home) + namesize + (sizeof lc_time))) 769 goto no_locale; 770 oldsun = 0; 771 (void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time); 772 fd = open(filename, O_RDONLY); 773 if (fd < 0) { 774 /* 775 ** Old Sun systems have a different naming and data convention. 776 */ 777 oldsun = 1; 778 (void) sprintf(filename, "%s/%s/%s", locale_home, 779 lc_time, name); 780 fd = open(filename, O_RDONLY); 781 if (fd < 0) 782 goto no_locale; 783 } 784 if (fstat(fd, &st) != 0) 785 goto bad_locale; 786 if (st.st_size <= 0) 787 goto bad_locale; 788 bufsize = namesize + st.st_size; 789 locale_buf = NULL; 790 lbuf = (lbuf == NULL) ? malloc(bufsize) : realloc(lbuf, bufsize); 791 if (lbuf == NULL) 792 goto bad_locale; 793 (void) strcpy(lbuf, name); 794 p = lbuf + namesize; 795 plim = p + st.st_size; 796 if (read(fd, p, (size_t) st.st_size) != st.st_size) 797 goto bad_lbuf; 798 if (close(fd) != 0) 799 goto bad_lbuf; 800 /* 801 ** Parse the locale file into localebuf. 802 */ 803 if (plim[-1] != '\n') 804 goto bad_lbuf; 805 for (ap = (const char **) &localebuf; 806 ap < (const char **) (&localebuf + 1); 807 ++ap) { 808 if (p == plim) 809 goto bad_lbuf; 810 *ap = p; 811 while (*p != '\n') 812 ++p; 813 *p++ = '\0'; 814 } 815 if (oldsun) { 816 /* 817 ** SunOS 4 used an obsolescent format; see localdtconv(3). 818 ** c_fmt had the ``short format for dates and times together'' 819 ** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale); 820 ** date_fmt had the ``long format for dates'' 821 ** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale). 822 ** Discard the latter in favor of the former. 823 */ 824 localebuf.date_fmt = localebuf.c_fmt; 825 } 826 /* 827 ** Record the successful parse in the cache. 828 */ 829 locale_buf = lbuf; 830 831 return &localebuf; 832 833bad_lbuf: 834 free(lbuf); 835bad_locale: 836 (void) close(fd); 837no_locale: 838 localebuf = C_time_locale; 839 locale_buf = NULL; 840 return &localebuf; 841} 842#endif /* defined LOCALE_HOME */ 843