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comparison: intl/icu/source/tools/tzcode/zdump.c

intl/icu/source/tools/tzcode/zdump.c

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1 static char elsieid[] = "@(#)zdump.c 8.8";
2
3 /*
4 ** This code has been made independent of the rest of the time
5 ** conversion package to increase confidence in the verification it provides.
6 ** You can use this code to help in verifying other implementations.
7 */
8
9 /*
10 * ICU note: Mr. Arthur David Olson (olsona@dc37a.nci.nih.gov) stated that
11 * "zdump.c is indeed in the public domain" in e-mail on Feb 22, 2007.
12 * This version of zdump.c is modified by ICU team to change output format
13 * and some additional options.
14 */
15
16
17 #include "stdio.h" /* for stdout, stderr, perror */
18 #include "string.h" /* for strcpy */
19 #include "sys/types.h" /* for time_t */
20 #include "time.h" /* for struct tm */
21 #include "stdlib.h" /* for exit, malloc, atoi */
22 #include "float.h" /* for FLT_MAX and DBL_MAX */
23 #include "ctype.h" /* for isalpha et al. */
24
25 /* Enable extensions and modifications for ICU. */
26 #define ICU
27
28 #ifdef ICU
29 #include "dirent.h"
30 #endif
31
32 #ifndef isascii
33 #define isascii(x) 1
34 #endif /* !defined isascii */
35
36 #ifndef ZDUMP_LO_YEAR
37 #define ZDUMP_LO_YEAR (-500)
38 #endif /* !defined ZDUMP_LO_YEAR */
39
40 #ifndef ZDUMP_HI_YEAR
41 #define ZDUMP_HI_YEAR 2500
42 #endif /* !defined ZDUMP_HI_YEAR */
43
44 #ifndef MAX_STRING_LENGTH
45 #define MAX_STRING_LENGTH 1024
46 #endif /* !defined MAX_STRING_LENGTH */
47
48 #ifndef TRUE
49 #define TRUE 1
50 #endif /* !defined TRUE */
51
52 #ifndef FALSE
53 #define FALSE 0
54 #endif /* !defined FALSE */
55
56 #ifndef EXIT_SUCCESS
57 #define EXIT_SUCCESS 0
58 #endif /* !defined EXIT_SUCCESS */
59
60 #ifndef EXIT_FAILURE
61 #define EXIT_FAILURE 1
62 #endif /* !defined EXIT_FAILURE */
63
64 #ifndef SECSPERMIN
65 #define SECSPERMIN 60
66 #endif /* !defined SECSPERMIN */
67
68 #ifndef MINSPERHOUR
69 #define MINSPERHOUR 60
70 #endif /* !defined MINSPERHOUR */
71
72 #ifndef SECSPERHOUR
73 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
74 #endif /* !defined SECSPERHOUR */
75
76 #ifndef HOURSPERDAY
77 #define HOURSPERDAY 24
78 #endif /* !defined HOURSPERDAY */
79
80 #ifndef EPOCH_YEAR
81 #define EPOCH_YEAR 1970
82 #endif /* !defined EPOCH_YEAR */
83
84 #ifndef TM_YEAR_BASE
85 #define TM_YEAR_BASE 1900
86 #endif /* !defined TM_YEAR_BASE */
87
88 #ifndef DAYSPERNYEAR
89 #define DAYSPERNYEAR 365
90 #endif /* !defined DAYSPERNYEAR */
91
92 #ifndef isleap
93 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
94 #endif /* !defined isleap */
95
96 #ifndef isleap_sum
97 /*
98 ** See tzfile.h for details on isleap_sum.
99 */
100 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
101 #endif /* !defined isleap_sum */
102
103 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
104 #define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
105 #define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
106
107 #ifndef HAVE_GETTEXT
108 #define HAVE_GETTEXT 0
109 #endif
110 #if HAVE_GETTEXT
111 #include "locale.h" /* for setlocale */
112 #include "libintl.h"
113 #endif /* HAVE_GETTEXT */
114
115 #ifndef GNUC_or_lint
116 #ifdef lint
117 #define GNUC_or_lint
118 #else /* !defined lint */
119 #ifdef __GNUC__
120 #define GNUC_or_lint
121 #endif /* defined __GNUC__ */
122 #endif /* !defined lint */
123 #endif /* !defined GNUC_or_lint */
124
125 #ifndef INITIALIZE
126 #ifdef GNUC_or_lint
127 #define INITIALIZE(x) ((x) = 0)
128 #else /* !defined GNUC_or_lint */
129 #define INITIALIZE(x)
130 #endif /* !defined GNUC_or_lint */
131 #endif /* !defined INITIALIZE */
132
133 /*
134 ** For the benefit of GNU folk...
135 ** `_(MSGID)' uses the current locale's message library string for MSGID.
136 ** The default is to use gettext if available, and use MSGID otherwise.
137 */
138
139 #ifndef _
140 #if HAVE_GETTEXT
141 #define _(msgid) gettext(msgid)
142 #else /* !HAVE_GETTEXT */
143 #define _(msgid) msgid
144 #endif /* !HAVE_GETTEXT */
145 #endif /* !defined _ */
146
147 #ifndef TZ_DOMAIN
148 #define TZ_DOMAIN "tz"
149 #endif /* !defined TZ_DOMAIN */
150
151 extern char ** environ;
152 extern int getopt(int argc, char * const argv[],
153 const char * options);
154 extern char * optarg;
155 extern int optind;
156 extern char * tzname[2];
157
158 static time_t absolute_min_time;
159 static time_t absolute_max_time;
160 static size_t longest;
161 static char * progname;
162 static int warned;
163
164 static char * abbr(struct tm * tmp);
165 static void abbrok(const char * abbrp, const char * zone);
166 static long delta(struct tm * newp, struct tm * oldp);
167 static void dumptime(const struct tm * tmp);
168 static time_t hunt(char * name, time_t lot, time_t hit);
169 static void setabsolutes(void);
170 static void show(char * zone, time_t t, int v);
171 static const char * tformat(void);
172 static time_t yeartot(long y);
173 #ifdef ICU
174 typedef struct listentry {
175 char * name;
176 struct listentry * next;
177 } listentry;
178
179 static time_t huntICU(char * name, time_t lot, time_t hit, FILE *fp);
180 static void dumptimeICU(FILE * fp, time_t t);
181 static void showICU(FILE * fp, char * zone, time_t t1, time_t t2);
182 static int getall(struct listentry ** namelist);
183 static void getzones(char * basedir, char * subdir, struct listentry ** last, int * count);
184 #endif
185
186 #ifndef TYPECHECK
187 #define my_localtime localtime
188 #else /* !defined TYPECHECK */
189 static struct tm *
190 my_localtime(tp)
191 time_t * tp;
192 {
193 register struct tm * tmp;
194
195 tmp = localtime(tp);
196 if (tp != NULL && tmp != NULL) {
197 struct tm tm;
198 register time_t t;
199
200 tm = *tmp;
201 t = mktime(&tm);
202 if (t - *tp >= 1 || *tp - t >= 1) {
203 (void) fflush(stdout);
204 (void) fprintf(stderr, "\n%s: ", progname);
205 (void) fprintf(stderr, tformat(), *tp);
206 (void) fprintf(stderr, " ->");
207 (void) fprintf(stderr, " year=%d", tmp->tm_year);
208 (void) fprintf(stderr, " mon=%d", tmp->tm_mon);
209 (void) fprintf(stderr, " mday=%d", tmp->tm_mday);
210 (void) fprintf(stderr, " hour=%d", tmp->tm_hour);
211 (void) fprintf(stderr, " min=%d", tmp->tm_min);
212 (void) fprintf(stderr, " sec=%d", tmp->tm_sec);
213 (void) fprintf(stderr, " isdst=%d", tmp->tm_isdst);
214 (void) fprintf(stderr, " -> ");
215 (void) fprintf(stderr, tformat(), t);
216 (void) fprintf(stderr, "\n");
217 }
218 }
219 return tmp;
220 }
221 #endif /* !defined TYPECHECK */
222
223 static void
224 abbrok(abbrp, zone)
225 const char * const abbrp;
226 const char * const zone;
227 {
228 register const char * cp;
229 register char * wp;
230
231 if (warned)
232 return;
233 cp = abbrp;
234 wp = NULL;
235 while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp))
236 ++cp;
237 if (cp - abbrp == 0)
238 wp = _("lacks alphabetic at start");
239 else if (cp - abbrp < 3)
240 wp = _("has fewer than 3 alphabetics");
241 else if (cp - abbrp > 6)
242 wp = _("has more than 6 alphabetics");
243 if (wp == NULL && (*cp == '+' || *cp == '-')) {
244 ++cp;
245 if (isascii((unsigned char) *cp) &&
246 isdigit((unsigned char) *cp))
247 if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
248 ++cp;
249 if (*cp != '\0')
250 wp = _("differs from POSIX standard");
251 }
252 if (wp == NULL)
253 return;
254 (void) fflush(stdout);
255 (void) fprintf(stderr,
256 _("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"),
257 progname, zone, abbrp, wp);
258 warned = TRUE;
259 }
260
261 static void
262 usage(const char *progname, FILE *stream, int status)
263 {
264 (void) fprintf(stream,
265 _("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n\
266 \n\
267 Report bugs to tz@elsie.nci.nih.gov.\n"),
268 progname, progname);
269 exit(status);
270 }
271
272 int
273 main(argc, argv)
274 int argc;
275 char * argv[];
276 {
277 register int i;
278 register int c;
279 register int vflag;
280 register char * cutarg;
281 register long cutloyear = ZDUMP_LO_YEAR;
282 register long cuthiyear = ZDUMP_HI_YEAR;
283 register time_t cutlotime;
284 register time_t cuthitime;
285 register char ** fakeenv;
286 time_t now;
287 time_t t;
288 time_t newt;
289 struct tm tm;
290 struct tm newtm;
291 register struct tm * tmp;
292 register struct tm * newtmp;
293 #ifdef ICU
294 int nextopt;
295 char * dirarg;
296 int aflag;
297 int iflag;
298 listentry * namelist = NULL;
299 FILE * fp = stdout;
300 #endif
301
302 INITIALIZE(cutlotime);
303 INITIALIZE(cuthitime);
304 #if HAVE_GETTEXT
305 (void) setlocale(LC_ALL, "");
306 #ifdef TZ_DOMAINDIR
307 (void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
308 #endif /* defined TEXTDOMAINDIR */
309 (void) textdomain(TZ_DOMAIN);
310 #endif /* HAVE_GETTEXT */
311 progname = argv[0];
312 for (i = 1; i < argc; ++i)
313 if (strcmp(argv[i], "--version") == 0) {
314 (void) printf("%s\n", elsieid);
315 exit(EXIT_SUCCESS);
316 } else if (strcmp(argv[i], "--help") == 0) {
317 usage(progname, stdout, EXIT_SUCCESS);
318 }
319 vflag = 0;
320 cutarg = NULL;
321 #ifdef ICU
322 aflag = 0;
323 iflag = 0;
324 dirarg = NULL;
325 nextopt = 1;
326 while(nextopt) {
327 c = getopt(argc, argv, "ac:d:iv");
328 switch(c) {
329 case 'a':
330 aflag = 1;
331 break;
332 case 'c':
333 cutarg = optarg;
334 break;
335 case 'd':
336 dirarg = optarg;
337 break;
338 case 'i':
339 iflag = 1;
340 break;
341 case 'v':
342 vflag = 1;
343 break;
344 default:
345 nextopt = 0;
346 break;
347 }
348 }
349 if ((c != EOF && c != -1) ||
350 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
351 (void) fprintf(stderr,
352 _("%s: usage is %s [ --version ] [ -a ] [ -v ] [ -i ] [ -c [loyear,]hiyear ] [ -d dir ] [ zonename ... ]\n"),
353 progname, progname);
354 exit(EXIT_FAILURE);
355 }
356
357 if (dirarg != NULL) {
358 DIR * dp;
359 /* create the output directory */
360 mkdir(dirarg, 0777);
361 if ((dp = opendir(dirarg)) == NULL) {
362 fprintf(stderr, "cannot create the target directory");
363 exit(EXIT_FAILURE);
364 }
365 closedir(dp);
366 }
367 #else
368 while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
369 if (c == 'v')
370 vflag = 1;
371 else cutarg = optarg;
372 if ((c != EOF && c != -1) ||
373 (optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
374 usage(progname, stderr, EXIT_FAILURE);
375 }
376 #endif
377 if (vflag) {
378 if (cutarg != NULL) {
379 long lo;
380 long hi;
381 char dummy;
382
383 if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
384 cuthiyear = hi;
385 } else if (sscanf(cutarg, "%ld,%ld%c",
386 &lo, &hi, &dummy) == 2) {
387 cutloyear = lo;
388 cuthiyear = hi;
389 } else {
390 (void) fprintf(stderr, _("%s: wild -c argument %s\n"),
391 progname, cutarg);
392 exit(EXIT_FAILURE);
393 }
394 }
395 setabsolutes();
396 cutlotime = yeartot(cutloyear);
397 cuthitime = yeartot(cuthiyear);
398 }
399
400 #ifdef ICU
401 if (aflag) {
402 /* get all available zones */
403 char ** fakeargv;
404 int i;
405 int count;
406
407 count = getall(&namelist);
408
409 fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv);
410 /*
411 if ((fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv)) == NULL) {
412 exit(EXIT_FAILURE);
413 }
414 */
415 for (i = 0; i < argc; i++) {
416 fakeargv[i] = argv[i];
417 }
418 for (i = 0; i < count; i++) {
419 fakeargv[i + argc] = namelist->name;
420 namelist = namelist->next;
421 }
422 argv = fakeargv;
423 argc += count;
424 }
425 #endif
426 (void) time(&now);
427 longest = 0;
428 for (i = optind; i < argc; ++i)
429 if (strlen(argv[i]) > longest)
430 longest = strlen(argv[i]);
431 {
432 register int from;
433 register int to;
434
435 for (i = 0; environ[i] != NULL; ++i)
436 continue;
437 fakeenv = (char **) malloc((size_t) ((i + 2) *
438 sizeof *fakeenv));
439 if (fakeenv == NULL ||
440 (fakeenv[0] = (char *) malloc(longest + 4)) == NULL) {
441 (void) perror(progname);
442 exit(EXIT_FAILURE);
443 }
444 to = 0;
445 (void) strcpy(fakeenv[to++], "TZ=");
446 for (from = 0; environ[from] != NULL; ++from)
447 if (strncmp(environ[from], "TZ=", 3) != 0)
448 fakeenv[to++] = environ[from];
449 fakeenv[to] = NULL;
450 environ = fakeenv;
451 }
452 for (i = optind; i < argc; ++i) {
453 static char buf[MAX_STRING_LENGTH];
454
455 (void) strcpy(&fakeenv[0][3], argv[i]);
456 if (!vflag) {
457 show(argv[i], now, FALSE);
458 continue;
459 }
460 #ifdef ICU
461 fp = NULL;
462 if (iflag) {
463 if (dirarg == NULL) {
464 /* we want to display a zone name here */
465 if (i != optind) {
466 printf("\n");
467 }
468 printf("ZONE: %s\n", argv[i]);
469 } else {
470 int zstart;
471 char path[FILENAME_MAX + 1];
472 strcpy(path, dirarg);
473 strcat(path, "/");
474 zstart = strlen(path);
475 strcat(path, argv[i]);
476 /* replace '/' with '-' */
477 while(path[++zstart] != 0) {
478 if (path[zstart] == '/') {
479 path[zstart] = '-';
480 }
481 }
482 if ((fp = fopen(path, "w")) == NULL) {
483 fprintf(stderr, "cannot create output file %s\n", path);
484 exit(EXIT_FAILURE);
485 }
486 }
487 }
488 #endif
489 warned = FALSE;
490 t = absolute_min_time;
491 #ifdef ICU
492 /* skip displaying info for the lowest time, which is actually not
493 * a transition when -i option is set */
494 if (!iflag) {
495 #endif
496 show(argv[i], t, TRUE);
497 t += SECSPERHOUR * HOURSPERDAY;
498 show(argv[i], t, TRUE);
499 #ifdef ICU
500 }
501 #endif
502 if (t < cutlotime)
503 t = cutlotime;
504 tmp = my_localtime(&t);
505 if (tmp != NULL) {
506 tm = *tmp;
507 (void) strncpy(buf, abbr(&tm), (sizeof buf) - 1);
508 }
509 for ( ; ; ) {
510 if (t >= cuthitime || t >= cuthitime - SECSPERHOUR * 12)
511 break;
512 newt = t + SECSPERHOUR * 12;
513 newtmp = localtime(&newt);
514 if (newtmp != NULL)
515 newtm = *newtmp;
516 #ifdef ICU
517 if (iflag) {
518 /* We do not want to capture transitions just for
519 * abbreviated zone name changes */
520 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
521 (delta(&newtm, &tm) != (newt - t) ||
522 newtm.tm_isdst != tm.tm_isdst)) {
523 newt = huntICU(argv[i], t, newt, fp);
524 newtmp = localtime(&newt);
525 if (newtmp != NULL) {
526 newtm = *newtmp;
527 (void) strncpy(buf,
528 abbr(&newtm),
529 (sizeof buf) - 1);
530 }
531 }
532 } else {
533 #endif
534 if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
535 (delta(&newtm, &tm) != (newt - t) ||
536 newtm.tm_isdst != tm.tm_isdst ||
537 strcmp(abbr(&newtm), buf) != 0)) {
538 newt = hunt(argv[i], t, newt);
539 newtmp = localtime(&newt);
540 if (newtmp != NULL) {
541 newtm = *newtmp;
542 (void) strncpy(buf,
543 abbr(&newtm),
544 (sizeof buf) - 1);
545 }
546 }
547 #ifdef ICU
548 }
549 #endif
550 t = newt;
551 tm = newtm;
552 tmp = newtmp;
553 }
554 #ifdef ICU
555 if (!iflag) {
556 /* skip displaying info for the highest time, which is actually not
557 * a transition when -i option is used*/
558 #endif
559 t = absolute_max_time;
560 t -= SECSPERHOUR * HOURSPERDAY;
561 show(argv[i], t, TRUE);
562 t += SECSPERHOUR * HOURSPERDAY;
563 show(argv[i], t, TRUE);
564
565 #ifdef ICU
566 }
567 /* close file */
568 if (fp != NULL) {
569 fclose(fp);
570 }
571 #endif
572 }
573 if (fflush(stdout) || ferror(stdout)) {
574 (void) fprintf(stderr, "%s: ", progname);
575 (void) perror(_("Error writing to standard output"));
576 exit(EXIT_FAILURE);
577 }
578 #ifdef ICU
579 if (aflag) {
580 struct listentry * entry = namelist;
581 struct listentry * next;
582 while (entry != NULL) {
583 free(entry->name);
584 next = entry->next;
585 free(entry);
586 entry = next;
587 }
588 }
589 #endif
590 exit(EXIT_SUCCESS);
591 /* If exit fails to exit... */
592 return EXIT_FAILURE;
593 }
594
595 static void
596 setabsolutes(void)
597 {
598 if (0.5 == (time_t) 0.5) {
599 /*
600 ** time_t is floating.
601 */
602 if (sizeof (time_t) == sizeof (float)) {
603 absolute_min_time = (time_t) -FLT_MAX;
604 absolute_max_time = (time_t) FLT_MAX;
605 } else if (sizeof (time_t) == sizeof (double)) {
606 absolute_min_time = (time_t) -DBL_MAX;
607 absolute_max_time = (time_t) DBL_MAX;
608 } else {
609 (void) fprintf(stderr,
610 _("%s: use of -v on system with floating time_t other than float or double\n"),
611 progname);
612 exit(EXIT_FAILURE);
613 }
614 } else if (0 > (time_t) -1) {
615 /*
616 ** time_t is signed. Assume overflow wraps around.
617 */
618 time_t t = 0;
619 time_t t1 = 1;
620
621 while (t < t1) {
622 t = t1;
623 t1 = 2 * t1 + 1;
624 }
625
626 absolute_max_time = t;
627 t = -t;
628 absolute_min_time = t - 1;
629 if (t < absolute_min_time)
630 absolute_min_time = t;
631 } else {
632 /*
633 ** time_t is unsigned.
634 */
635 absolute_min_time = 0;
636 absolute_max_time = absolute_min_time - 1;
637 }
638 }
639
640 static time_t
641 yeartot(y)
642 const long y;
643 {
644 register long myy;
645 register long seconds;
646 register time_t t;
647
648 myy = EPOCH_YEAR;
649 t = 0;
650 while (myy != y) {
651 if (myy < y) {
652 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
653 ++myy;
654 if (t > absolute_max_time - seconds) {
655 t = absolute_max_time;
656 break;
657 }
658 t += seconds;
659 } else {
660 --myy;
661 seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
662 if (t < absolute_min_time + seconds) {
663 t = absolute_min_time;
664 break;
665 }
666 t -= seconds;
667 }
668 }
669 return t;
670 }
671
672 static time_t
673 hunt(char *name, time_t lot, time_t hit)
674 {
675 time_t t;
676 long diff;
677 struct tm lotm;
678 register struct tm * lotmp;
679 struct tm tm;
680 register struct tm * tmp;
681 char loab[MAX_STRING_LENGTH];
682
683 lotmp = my_localtime(&lot);
684 if (lotmp != NULL) {
685 lotm = *lotmp;
686 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
687 }
688 for ( ; ; ) {
689 diff = (long) (hit - lot);
690 if (diff < 2)
691 break;
692 t = lot;
693 t += diff / 2;
694 if (t <= lot)
695 ++t;
696 else if (t >= hit)
697 --t;
698 tmp = my_localtime(&t);
699 if (tmp != NULL)
700 tm = *tmp;
701 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
702 (delta(&tm, &lotm) == (t - lot) &&
703 tm.tm_isdst == lotm.tm_isdst &&
704 strcmp(abbr(&tm), loab) == 0)) {
705 lot = t;
706 lotm = tm;
707 lotmp = tmp;
708 } else hit = t;
709 }
710 show(name, lot, TRUE);
711 show(name, hit, TRUE);
712 return hit;
713 }
714
715 /*
716 ** Thanks to Paul Eggert for logic used in delta.
717 */
718
719 static long
720 delta(newp, oldp)
721 struct tm * newp;
722 struct tm * oldp;
723 {
724 register long result;
725 register int tmy;
726
727 if (newp->tm_year < oldp->tm_year)
728 return -delta(oldp, newp);
729 result = 0;
730 for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy)
731 result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE);
732 result += newp->tm_yday - oldp->tm_yday;
733 result *= HOURSPERDAY;
734 result += newp->tm_hour - oldp->tm_hour;
735 result *= MINSPERHOUR;
736 result += newp->tm_min - oldp->tm_min;
737 result *= SECSPERMIN;
738 result += newp->tm_sec - oldp->tm_sec;
739 return result;
740 }
741
742 static void
743 show(char *zone, time_t t, int v)
744 {
745 register struct tm * tmp;
746
747 (void) printf("%-*s ", (int) longest, zone);
748 if (v) {
749 tmp = gmtime(&t);
750 if (tmp == NULL) {
751 (void) printf(tformat(), t);
752 } else {
753 dumptime(tmp);
754 (void) printf(" UTC");
755 }
756 (void) printf(" = ");
757 }
758 tmp = my_localtime(&t);
759 dumptime(tmp);
760 if (tmp != NULL) {
761 if (*abbr(tmp) != '\0')
762 (void) printf(" %s", abbr(tmp));
763 if (v) {
764 (void) printf(" isdst=%d", tmp->tm_isdst);
765 #ifdef TM_GMTOFF
766 (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
767 #endif /* defined TM_GMTOFF */
768 }
769 }
770 (void) printf("\n");
771 if (tmp != NULL && *abbr(tmp) != '\0')
772 abbrok(abbr(tmp), zone);
773 }
774
775 static char *
776 abbr(tmp)
777 struct tm * tmp;
778 {
779 register char * result;
780 static char nada;
781
782 if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
783 return &nada;
784 result = tzname[tmp->tm_isdst];
785 return (result == NULL) ? &nada : result;
786 }
787
788 /*
789 ** The code below can fail on certain theoretical systems;
790 ** it works on all known real-world systems as of 2004-12-30.
791 */
792
793 static const char *
794 tformat(void)
795 {
796 if (0.5 == (time_t) 0.5) { /* floating */
797 if (sizeof (time_t) > sizeof (double))
798 return "%Lg";
799 return "%g";
800 }
801 if (0 > (time_t) -1) { /* signed */
802 if (sizeof (time_t) > sizeof (long))
803 return "%lld";
804 if (sizeof (time_t) > sizeof (int))
805 return "%ld";
806 return "%d";
807 }
808 if (sizeof (time_t) > sizeof (unsigned long))
809 return "%llu";
810 if (sizeof (time_t) > sizeof (unsigned int))
811 return "%lu";
812 return "%u";
813 }
814
815 static void
816 dumptime(timeptr)
817 register const struct tm * timeptr;
818 {
819 static const char wday_name[][3] = {
820 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
821 };
822 static const char mon_name[][3] = {
823 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
824 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
825 };
826 register const char * wn;
827 register const char * mn;
828 register int lead;
829 register int trail;
830
831 if (timeptr == NULL) {
832 (void) printf("NULL");
833 return;
834 }
835 /*
836 ** The packaged versions of localtime and gmtime never put out-of-range
837 ** values in tm_wday or tm_mon, but since this code might be compiled
838 ** with other (perhaps experimental) versions, paranoia is in order.
839 */
840 if (timeptr->tm_wday < 0 || timeptr->tm_wday >=
841 (int) (sizeof wday_name / sizeof wday_name[0]))
842 wn = "???";
843 else wn = wday_name[timeptr->tm_wday];
844 if (timeptr->tm_mon < 0 || timeptr->tm_mon >=
845 (int) (sizeof mon_name / sizeof mon_name[0]))
846 mn = "???";
847 else mn = mon_name[timeptr->tm_mon];
848 (void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
849 wn, mn,
850 timeptr->tm_mday, timeptr->tm_hour,
851 timeptr->tm_min, timeptr->tm_sec);
852 #define DIVISOR 10
853 trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
854 lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
855 trail / DIVISOR;
856 trail %= DIVISOR;
857 if (trail < 0 && lead > 0) {
858 trail += DIVISOR;
859 --lead;
860 } else if (lead < 0 && trail > 0) {
861 trail -= DIVISOR;
862 ++lead;
863 }
864 if (lead == 0)
865 (void) printf("%d", trail);
866 else (void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
867 }
868
869 #ifdef ICU
870 static time_t
871 huntICU(char *name, time_t lot, time_t hit, FILE * fp)
872 {
873 time_t t;
874 long diff;
875 struct tm lotm;
876 register struct tm * lotmp;
877 struct tm tm;
878 register struct tm * tmp;
879 char loab[MAX_STRING_LENGTH];
880
881 lotmp = my_localtime(&lot);
882 if (lotmp != NULL) {
883 lotm = *lotmp;
884 (void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
885 }
886 for ( ; ; ) {
887 diff = (long) (hit - lot);
888 if (diff < 2)
889 break;
890 t = lot;
891 t += diff / 2;
892 if (t <= lot)
893 ++t;
894 else if (t >= hit)
895 --t;
896 tmp = my_localtime(&t);
897 if (tmp != NULL)
898 tm = *tmp;
899 /* We do not want to capture transitions just for
900 * abbreviated zone name changes */
901 if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
902 (delta(&tm, &lotm) == (t - lot) &&
903 tm.tm_isdst == lotm.tm_isdst)) {
904 lot = t;
905 lotm = tm;
906 lotmp = tmp;
907 } else hit = t;
908 }
909 showICU(fp, name, lot, hit);
910 return hit;
911 }
912
913 static void showICU(FILE * fp, char *zone, time_t t1, time_t t2)
914 {
915 if (fp == NULL) {
916 fp = stdout;
917 }
918 dumptimeICU(fp, t1);
919 fprintf(fp, " > ");
920 dumptimeICU(fp, t2);
921 fprintf(fp, "\n");
922 }
923
924 static void dumptimeICU(FILE * fp, time_t t)
925 {
926 static const char wday_name[][3] = {
927 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
928 };
929 struct tm gmt;
930 struct tm loc;
931 register int lead;
932 register int trail;
933 long offset;
934 long hour, min, sec;
935
936 loc = *my_localtime(&t);
937
938 trail = loc.tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
939 lead = loc.tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + trail / DIVISOR;
940 trail %= DIVISOR;
941 if (trail < 0 && lead > 0) {
942 trail += DIVISOR;
943 --lead;
944 } else if (lead < 0 && trail > 0) {
945 trail -= DIVISOR;
946 ++lead;
947 }
948
949 fprintf(fp, "%04d-%02d-%02d", lead * DIVISOR + trail, loc.tm_mon + 1, loc.tm_mday);
950 fprintf(fp, " %.3s ", wday_name[loc.tm_wday]);
951 fprintf(fp, "%02d:%02d:%02d", loc.tm_hour, loc.tm_min, loc.tm_sec);
952
953 gmt = *gmtime(&t);
954 offset = delta(&loc, &gmt);
955 if (offset < 0) {
956 offset = -offset;
957 fprintf(fp, "-");
958 } else {
959 fprintf(fp, "+");
960 }
961
962 sec = offset % 60;
963 offset = (offset - sec) / 60;
964 min = offset % 60;
965 hour = offset / 60;
966
967 fprintf(fp, "%02d", hour);
968 fprintf(fp, "%02d", min);
969 fprintf(fp, "%02d", sec);
970 fprintf(fp, "[DST=%d]", loc.tm_isdst);
971 }
972
973 static int getall(struct listentry ** namelist) {
974 int count = 0;
975 struct listentry dummyentry;
976 struct listentry * last = &dummyentry;
977
978 getzones(TZDIR, NULL, &last, &count);
979 if (count > 0) {
980 *namelist = dummyentry.next;
981 }
982
983 return count;
984 }
985
986 static void getzones(char * basedir, char * relpath, struct listentry ** last, int * count) {
987 char path[FILENAME_MAX + 1];
988 struct dirent * dir;
989 DIR * dp;
990
991 strcpy(path, basedir);
992 if (relpath != NULL) {
993 strcat(path, "/");
994 strcat(path, relpath);
995 }
996
997 if ((dp = opendir(path)) == NULL) {
998 /* file */
999 if (strstr(relpath, ".tab") == NULL && strcmp(relpath, "Etc/Unknown") != 0) {
1000 char * pzonename;
1001 listentry * pentry;
1002
1003 if ((pzonename = malloc(strlen(relpath) + 1)) == NULL) {
1004 exit(EXIT_FAILURE);
1005 }
1006 strcpy(pzonename, relpath);
1007
1008 if ((pentry = malloc(sizeof(listentry))) == NULL) {
1009 exit(EXIT_FAILURE);
1010 }
1011
1012 pentry->name = pzonename;
1013 pentry->next = NULL;
1014 (*last)->next = pentry;
1015 *last = pentry;
1016 (*count)++;
1017 }
1018 } else {
1019 /* directory */
1020 while ((dir = readdir(dp)) != NULL) {
1021 char subpath[FILENAME_MAX + 1];
1022
1023 if (strcmp(dir->d_name, ".") == 0
1024 || strcmp(dir->d_name, "..") == 0) {
1025 continue;
1026 }
1027 if (relpath != NULL) {
1028 strcpy(subpath, relpath);
1029 strcat(subpath, "/");
1030 strcat(subpath, dir->d_name);
1031 } else {
1032 strcpy(subpath, dir->d_name);
1033 }
1034 getzones(basedir, subpath, last, count);
1035 }
1036 closedir(dp);
1037 }
1038 }
1039 #endif

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