michael@0: static char	elsieid[] = "@(#)zdump.c	8.8";
michael@0: 
michael@0: /*
michael@0: ** This code has been made independent of the rest of the time
michael@0: ** conversion package to increase confidence in the verification it provides.
michael@0: ** You can use this code to help in verifying other implementations.
michael@0: */
michael@0: 
michael@0: /*
michael@0:  * ICU note: Mr. Arthur David Olson (olsona@dc37a.nci.nih.gov) stated that
michael@0:  * "zdump.c is indeed in the public domain" in e-mail on Feb 22, 2007.
michael@0:  * This version of zdump.c is modified by ICU team to change output format
michael@0:  * and some additional options.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "stdio.h"	/* for stdout, stderr, perror */
michael@0: #include "string.h"	/* for strcpy */
michael@0: #include "sys/types.h"	/* for time_t */
michael@0: #include "time.h"	/* for struct tm */
michael@0: #include "stdlib.h"	/* for exit, malloc, atoi */
michael@0: #include "float.h"	/* for FLT_MAX and DBL_MAX */
michael@0: #include "ctype.h"	/* for isalpha et al. */
michael@0: 
michael@0: /* Enable extensions and modifications for ICU. */
michael@0: #define ICU
michael@0: 
michael@0: #ifdef ICU
michael@0: #include "dirent.h"
michael@0: #endif
michael@0: 
michael@0: #ifndef isascii
michael@0: #define isascii(x) 1
michael@0: #endif /* !defined isascii */
michael@0: 
michael@0: #ifndef ZDUMP_LO_YEAR
michael@0: #define ZDUMP_LO_YEAR	(-500)
michael@0: #endif /* !defined ZDUMP_LO_YEAR */
michael@0: 
michael@0: #ifndef ZDUMP_HI_YEAR
michael@0: #define ZDUMP_HI_YEAR	2500
michael@0: #endif /* !defined ZDUMP_HI_YEAR */
michael@0: 
michael@0: #ifndef MAX_STRING_LENGTH
michael@0: #define MAX_STRING_LENGTH	1024
michael@0: #endif /* !defined MAX_STRING_LENGTH */
michael@0: 
michael@0: #ifndef TRUE
michael@0: #define TRUE		1
michael@0: #endif /* !defined TRUE */
michael@0: 
michael@0: #ifndef FALSE
michael@0: #define FALSE		0
michael@0: #endif /* !defined FALSE */
michael@0: 
michael@0: #ifndef EXIT_SUCCESS
michael@0: #define EXIT_SUCCESS	0
michael@0: #endif /* !defined EXIT_SUCCESS */
michael@0: 
michael@0: #ifndef EXIT_FAILURE
michael@0: #define EXIT_FAILURE	1
michael@0: #endif /* !defined EXIT_FAILURE */
michael@0: 
michael@0: #ifndef SECSPERMIN
michael@0: #define SECSPERMIN	60
michael@0: #endif /* !defined SECSPERMIN */
michael@0: 
michael@0: #ifndef MINSPERHOUR
michael@0: #define MINSPERHOUR	60
michael@0: #endif /* !defined MINSPERHOUR */
michael@0: 
michael@0: #ifndef SECSPERHOUR
michael@0: #define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
michael@0: #endif /* !defined SECSPERHOUR */
michael@0: 
michael@0: #ifndef HOURSPERDAY
michael@0: #define HOURSPERDAY	24
michael@0: #endif /* !defined HOURSPERDAY */
michael@0: 
michael@0: #ifndef EPOCH_YEAR
michael@0: #define EPOCH_YEAR	1970
michael@0: #endif /* !defined EPOCH_YEAR */
michael@0: 
michael@0: #ifndef TM_YEAR_BASE
michael@0: #define TM_YEAR_BASE	1900
michael@0: #endif /* !defined TM_YEAR_BASE */
michael@0: 
michael@0: #ifndef DAYSPERNYEAR
michael@0: #define DAYSPERNYEAR	365
michael@0: #endif /* !defined DAYSPERNYEAR */
michael@0: 
michael@0: #ifndef isleap
michael@0: #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
michael@0: #endif /* !defined isleap */
michael@0: 
michael@0: #ifndef isleap_sum
michael@0: /*
michael@0: ** See tzfile.h for details on isleap_sum.
michael@0: */
michael@0: #define isleap_sum(a, b)	isleap((a) % 400 + (b) % 400)
michael@0: #endif /* !defined isleap_sum */
michael@0: 
michael@0: #define SECSPERDAY	((long) SECSPERHOUR * HOURSPERDAY)
michael@0: #define SECSPERNYEAR	(SECSPERDAY * DAYSPERNYEAR)
michael@0: #define SECSPERLYEAR	(SECSPERNYEAR + SECSPERDAY)
michael@0: 
michael@0: #ifndef HAVE_GETTEXT
michael@0: #define HAVE_GETTEXT 0
michael@0: #endif
michael@0: #if HAVE_GETTEXT
michael@0: #include "locale.h"	/* for setlocale */
michael@0: #include "libintl.h"
michael@0: #endif /* HAVE_GETTEXT */
michael@0: 
michael@0: #ifndef GNUC_or_lint
michael@0: #ifdef lint
michael@0: #define GNUC_or_lint
michael@0: #else /* !defined lint */
michael@0: #ifdef __GNUC__
michael@0: #define GNUC_or_lint
michael@0: #endif /* defined __GNUC__ */
michael@0: #endif /* !defined lint */
michael@0: #endif /* !defined GNUC_or_lint */
michael@0: 
michael@0: #ifndef INITIALIZE
michael@0: #ifdef GNUC_or_lint
michael@0: #define INITIALIZE(x)	((x) = 0)
michael@0: #else /* !defined GNUC_or_lint */
michael@0: #define INITIALIZE(x)
michael@0: #endif /* !defined GNUC_or_lint */
michael@0: #endif /* !defined INITIALIZE */
michael@0: 
michael@0: /*
michael@0: ** For the benefit of GNU folk...
michael@0: ** `_(MSGID)' uses the current locale's message library string for MSGID.
michael@0: ** The default is to use gettext if available, and use MSGID otherwise.
michael@0: */
michael@0: 
michael@0: #ifndef _
michael@0: #if HAVE_GETTEXT
michael@0: #define _(msgid) gettext(msgid)
michael@0: #else /* !HAVE_GETTEXT */
michael@0: #define _(msgid) msgid
michael@0: #endif /* !HAVE_GETTEXT */
michael@0: #endif /* !defined _ */
michael@0: 
michael@0: #ifndef TZ_DOMAIN
michael@0: #define TZ_DOMAIN "tz"
michael@0: #endif /* !defined TZ_DOMAIN */
michael@0: 
michael@0: extern char **	environ;
michael@0: extern int	getopt(int argc, char * const argv[],
michael@0: 			const char * options);
michael@0: extern char *	optarg;
michael@0: extern int	optind;
michael@0: extern char *	tzname[2];
michael@0: 
michael@0: static time_t	absolute_min_time;
michael@0: static time_t	absolute_max_time;
michael@0: static size_t	longest;
michael@0: static char *	progname;
michael@0: static int	warned;
michael@0: 
michael@0: static char *	abbr(struct tm * tmp);
michael@0: static void	abbrok(const char * abbrp, const char * zone);
michael@0: static long	delta(struct tm * newp, struct tm * oldp);
michael@0: static void	dumptime(const struct tm * tmp);
michael@0: static time_t	hunt(char * name, time_t lot, time_t	hit);
michael@0: static void	setabsolutes(void);
michael@0: static void	show(char * zone, time_t t, int v);
michael@0: static const char *	tformat(void);
michael@0: static time_t	yeartot(long y);
michael@0: #ifdef ICU
michael@0: typedef struct listentry {
michael@0: 	char *		name;
michael@0: 	struct listentry *	next;
michael@0: } listentry;
michael@0: 
michael@0: static time_t	huntICU(char * name, time_t lot, time_t	hit, FILE *fp);
michael@0: static void	dumptimeICU(FILE * fp, time_t t);
michael@0: static void	showICU(FILE * fp, char * zone, time_t t1, time_t t2);
michael@0: static int	getall(struct listentry ** namelist);
michael@0: static void getzones(char * basedir, char * subdir, struct listentry ** last, int * count);
michael@0: #endif
michael@0: 
michael@0: #ifndef TYPECHECK
michael@0: #define my_localtime	localtime
michael@0: #else /* !defined TYPECHECK */
michael@0: static struct tm *
michael@0: my_localtime(tp)
michael@0: time_t *	tp;
michael@0: {
michael@0: 	register struct tm *	tmp;
michael@0: 
michael@0: 	tmp = localtime(tp);
michael@0: 	if (tp != NULL && tmp != NULL) {
michael@0: 		struct tm	tm;
michael@0: 		register time_t	t;
michael@0: 
michael@0: 		tm = *tmp;
michael@0: 		t = mktime(&tm);
michael@0: 		if (t - *tp >= 1 || *tp - t >= 1) {
michael@0: 			(void) fflush(stdout);
michael@0: 			(void) fprintf(stderr, "\n%s: ", progname);
michael@0: 			(void) fprintf(stderr, tformat(), *tp);
michael@0: 			(void) fprintf(stderr, " ->");
michael@0: 			(void) fprintf(stderr, " year=%d", tmp->tm_year);
michael@0: 			(void) fprintf(stderr, " mon=%d", tmp->tm_mon);
michael@0: 			(void) fprintf(stderr, " mday=%d", tmp->tm_mday);
michael@0: 			(void) fprintf(stderr, " hour=%d", tmp->tm_hour);
michael@0: 			(void) fprintf(stderr, " min=%d", tmp->tm_min);
michael@0: 			(void) fprintf(stderr, " sec=%d", tmp->tm_sec);
michael@0: 			(void) fprintf(stderr, " isdst=%d", tmp->tm_isdst);
michael@0: 			(void) fprintf(stderr, " -> ");
michael@0: 			(void) fprintf(stderr, tformat(), t);
michael@0: 			(void) fprintf(stderr, "\n");
michael@0: 		}
michael@0: 	}
michael@0: 	return tmp;
michael@0: }
michael@0: #endif /* !defined TYPECHECK */
michael@0: 
michael@0: static void
michael@0: abbrok(abbrp, zone)
michael@0: const char * const	abbrp;
michael@0: const char * const	zone;
michael@0: {
michael@0: 	register const char *	cp;
michael@0: 	register char *		wp;
michael@0: 
michael@0: 	if (warned)
michael@0: 		return;
michael@0: 	cp = abbrp;
michael@0: 	wp = NULL;
michael@0: 	while (isascii((unsigned char) *cp) && isalpha((unsigned char) *cp))
michael@0: 		++cp;
michael@0: 	if (cp - abbrp == 0)
michael@0: 		wp = _("lacks alphabetic at start");
michael@0: 	else if (cp - abbrp < 3)
michael@0: 		wp = _("has fewer than 3 alphabetics");
michael@0: 	else if (cp - abbrp > 6)
michael@0: 		wp = _("has more than 6 alphabetics");
michael@0: 	if (wp == NULL && (*cp == '+' || *cp == '-')) {
michael@0: 		++cp;
michael@0: 		if (isascii((unsigned char) *cp) &&
michael@0: 			isdigit((unsigned char) *cp))
michael@0: 				if (*cp++ == '1' && *cp >= '0' && *cp <= '4')
michael@0: 					++cp;
michael@0: 		if (*cp != '\0')
michael@0: 			wp = _("differs from POSIX standard");
michael@0: 	}
michael@0: 	if (wp == NULL)
michael@0: 		return;
michael@0: 	(void) fflush(stdout);
michael@0: 	(void) fprintf(stderr,
michael@0: 		_("%s: warning: zone \"%s\" abbreviation \"%s\" %s\n"),
michael@0: 		progname, zone, abbrp, wp);
michael@0: 	warned = TRUE;
michael@0: }
michael@0: 
michael@0: static void
michael@0: usage(const char *progname, FILE *stream, int status)
michael@0: {
michael@0: 	(void) fprintf(stream,
michael@0: _("%s: usage is %s [ --version ] [ --help ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n\
michael@0: \n\
michael@0: Report bugs to tz@elsie.nci.nih.gov.\n"),
michael@0: 		       progname, progname);
michael@0: 	exit(status);
michael@0: }
michael@0: 
michael@0: int
michael@0: main(argc, argv)
michael@0: int	argc;
michael@0: char *	argv[];
michael@0: {
michael@0: 	register int		i;
michael@0: 	register int		c;
michael@0: 	register int		vflag;
michael@0: 	register char *		cutarg;
michael@0: 	register long		cutloyear = ZDUMP_LO_YEAR;
michael@0: 	register long		cuthiyear = ZDUMP_HI_YEAR;
michael@0: 	register time_t		cutlotime;
michael@0: 	register time_t		cuthitime;
michael@0: 	register char **	fakeenv;
michael@0: 	time_t			now;
michael@0: 	time_t			t;
michael@0: 	time_t			newt;
michael@0: 	struct tm		tm;
michael@0: 	struct tm		newtm;
michael@0: 	register struct tm *	tmp;
michael@0: 	register struct tm *	newtmp;
michael@0: #ifdef ICU
michael@0: 	int		nextopt;
michael@0: 	char *	dirarg;
michael@0: 	int		aflag;
michael@0: 	int		iflag;
michael@0: 	listentry *	namelist = NULL;
michael@0: 	FILE *	fp = stdout;
michael@0: #endif
michael@0: 
michael@0: 	INITIALIZE(cutlotime);
michael@0: 	INITIALIZE(cuthitime);
michael@0: #if HAVE_GETTEXT
michael@0: 	(void) setlocale(LC_ALL, "");
michael@0: #ifdef TZ_DOMAINDIR
michael@0: 	(void) bindtextdomain(TZ_DOMAIN, TZ_DOMAINDIR);
michael@0: #endif /* defined TEXTDOMAINDIR */
michael@0: 	(void) textdomain(TZ_DOMAIN);
michael@0: #endif /* HAVE_GETTEXT */
michael@0: 	progname = argv[0];
michael@0: 	for (i = 1; i < argc; ++i)
michael@0: 		if (strcmp(argv[i], "--version") == 0) {
michael@0: 			(void) printf("%s\n", elsieid);
michael@0: 			exit(EXIT_SUCCESS);
michael@0: 		} else if (strcmp(argv[i], "--help") == 0) {
michael@0: 			usage(progname, stdout, EXIT_SUCCESS);
michael@0: 		}
michael@0: 	vflag = 0;
michael@0: 	cutarg = NULL;
michael@0: #ifdef ICU
michael@0: 	aflag = 0;
michael@0: 	iflag = 0;
michael@0: 	dirarg = NULL;
michael@0: 	nextopt = 1;
michael@0: 	while(nextopt) {
michael@0: 		c = getopt(argc, argv, "ac:d:iv");
michael@0: 		switch(c) {
michael@0: 		case 'a':
michael@0: 			aflag = 1;
michael@0: 			break;
michael@0: 		case 'c':
michael@0: 			cutarg = optarg;
michael@0: 			break;
michael@0: 		case 'd':
michael@0: 			dirarg = optarg;
michael@0: 			break;
michael@0: 		case 'i':
michael@0: 			iflag = 1;
michael@0: 			break;
michael@0: 		case 'v':
michael@0: 			vflag = 1;
michael@0: 			break;
michael@0: 		default:
michael@0: 			nextopt = 0;
michael@0: 			break;
michael@0: 		}
michael@0: 	}
michael@0: 	if ((c != EOF && c != -1) ||
michael@0: 		(optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
michael@0: 			(void) fprintf(stderr,
michael@0: 				_("%s: usage is %s [ --version ] [ -a ] [ -v ] [ -i ] [ -c [loyear,]hiyear ] [ -d dir ] [ zonename ... ]\n"),
michael@0: 				progname, progname);
michael@0: 			exit(EXIT_FAILURE);
michael@0: 	}
michael@0: 
michael@0: 	if (dirarg != NULL) {
michael@0: 		DIR *	dp;
michael@0: 		/* create the output directory */
michael@0: 		mkdir(dirarg, 0777);
michael@0: 		if ((dp = opendir(dirarg)) == NULL) {
michael@0: 			fprintf(stderr, "cannot create the target directory");
michael@0: 			exit(EXIT_FAILURE);
michael@0: 		}
michael@0: 		closedir(dp);
michael@0: 	}
michael@0: #else
michael@0: 	while ((c = getopt(argc, argv, "c:v")) == 'c' || c == 'v')
michael@0: 		if (c == 'v')
michael@0: 			vflag = 1;
michael@0: 		else	cutarg = optarg;
michael@0: 	if ((c != EOF && c != -1) ||
michael@0: 		(optind == argc - 1 && strcmp(argv[optind], "=") == 0)) {
michael@0: 			usage(progname, stderr, EXIT_FAILURE);
michael@0: 	}
michael@0: #endif
michael@0: 	if (vflag) {
michael@0: 		if (cutarg != NULL) {
michael@0: 			long	lo;
michael@0: 			long	hi;
michael@0: 			char	dummy;
michael@0: 
michael@0: 			if (sscanf(cutarg, "%ld%c", &hi, &dummy) == 1) {
michael@0: 				cuthiyear = hi;
michael@0: 			} else if (sscanf(cutarg, "%ld,%ld%c",
michael@0: 				&lo, &hi, &dummy) == 2) {
michael@0: 					cutloyear = lo;
michael@0: 					cuthiyear = hi;
michael@0: 			} else {
michael@0: (void) fprintf(stderr, _("%s: wild -c argument %s\n"),
michael@0: 					progname, cutarg);
michael@0: 				exit(EXIT_FAILURE);
michael@0: 			}
michael@0: 		}
michael@0: 		setabsolutes();
michael@0: 		cutlotime = yeartot(cutloyear);
michael@0: 		cuthitime = yeartot(cuthiyear);
michael@0: 	}
michael@0: 
michael@0: #ifdef ICU
michael@0: 	if (aflag) {
michael@0: 		/* get all available zones */
michael@0: 		char ** fakeargv;
michael@0: 		int i;
michael@0: 		int count;
michael@0: 
michael@0: 		count = getall(&namelist);
michael@0: 
michael@0: 		fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv);
michael@0: 		/*
michael@0: 		if ((fakeargv = (char **) malloc((size_t) (argc + count) * sizeof *argv)) == NULL) {
michael@0: 			exit(EXIT_FAILURE);
michael@0: 		}
michael@0: 		*/
michael@0: 		for (i = 0; i < argc; i++) {
michael@0: 			fakeargv[i] = argv[i];
michael@0: 		}
michael@0: 		for (i = 0; i < count; i++) {
michael@0: 			fakeargv[i + argc] = namelist->name;
michael@0: 			namelist = namelist->next;
michael@0: 		}
michael@0: 		argv = fakeargv;
michael@0: 		argc += count;
michael@0: 	}
michael@0: #endif
michael@0: 	(void) time(&now);
michael@0: 	longest = 0;
michael@0: 	for (i = optind; i < argc; ++i)
michael@0: 		if (strlen(argv[i]) > longest)
michael@0: 			longest = strlen(argv[i]);
michael@0: 	{
michael@0: 		register int	from;
michael@0: 		register int	to;
michael@0: 
michael@0: 		for (i = 0; environ[i] != NULL; ++i)
michael@0: 			continue;
michael@0: 		fakeenv = (char **) malloc((size_t) ((i + 2) *
michael@0: 			sizeof *fakeenv));
michael@0: 		if (fakeenv == NULL ||
michael@0: 			(fakeenv[0] = (char *) malloc(longest + 4)) == NULL) {
michael@0: 					(void) perror(progname);
michael@0: 					exit(EXIT_FAILURE);
michael@0: 		}
michael@0: 		to = 0;
michael@0: 		(void) strcpy(fakeenv[to++], "TZ=");
michael@0: 		for (from = 0; environ[from] != NULL; ++from)
michael@0: 			if (strncmp(environ[from], "TZ=", 3) != 0)
michael@0: 				fakeenv[to++] = environ[from];
michael@0: 		fakeenv[to] = NULL;
michael@0: 		environ = fakeenv;
michael@0: 	}
michael@0: 	for (i = optind; i < argc; ++i) {
michael@0: 		static char	buf[MAX_STRING_LENGTH];
michael@0: 
michael@0: 		(void) strcpy(&fakeenv[0][3], argv[i]);
michael@0: 		if (!vflag) {
michael@0: 			show(argv[i], now, FALSE);
michael@0: 			continue;
michael@0: 		}
michael@0: #ifdef ICU
michael@0: 		fp = NULL;
michael@0: 		if (iflag) {
michael@0: 			if (dirarg == NULL) {
michael@0: 				/* we want to display a zone name here */
michael@0: 				if (i != optind) {
michael@0: 					printf("\n");
michael@0: 				}
michael@0: 				printf("ZONE: %s\n", argv[i]);
michael@0: 			} else {
michael@0: 				int		zstart;
michael@0: 				char	path[FILENAME_MAX + 1];
michael@0: 				strcpy(path, dirarg);
michael@0: 				strcat(path, "/");
michael@0: 				zstart = strlen(path);
michael@0: 				strcat(path, argv[i]);
michael@0: 				/* replace '/' with '-' */
michael@0: 				while(path[++zstart] != 0) {
michael@0: 					if (path[zstart] == '/') {
michael@0: 						path[zstart] = '-';
michael@0: 					}
michael@0: 				}
michael@0: 				if ((fp = fopen(path, "w")) == NULL) {
michael@0: 					fprintf(stderr, "cannot create output file %s\n", path);
michael@0: 					exit(EXIT_FAILURE);
michael@0: 				}
michael@0: 			}
michael@0: 		}
michael@0: #endif
michael@0: 		warned = FALSE;
michael@0: 		t = absolute_min_time;
michael@0: #ifdef ICU
michael@0: 		/* skip displaying info for the lowest time, which is actually not
michael@0: 		 * a transition when -i option is set */
michael@0: 		if (!iflag) {
michael@0: #endif
michael@0: 		show(argv[i], t, TRUE);
michael@0: 		t += SECSPERHOUR * HOURSPERDAY;
michael@0: 		show(argv[i], t, TRUE);
michael@0: #ifdef ICU
michael@0: 		}
michael@0: #endif
michael@0: 		if (t < cutlotime)
michael@0: 			t = cutlotime;
michael@0: 		tmp = my_localtime(&t);
michael@0: 		if (tmp != NULL) {
michael@0: 			tm = *tmp;
michael@0: 			(void) strncpy(buf, abbr(&tm), (sizeof buf) - 1);
michael@0: 		}
michael@0: 		for ( ; ; ) {
michael@0: 			if (t >= cuthitime || t >= cuthitime - SECSPERHOUR * 12)
michael@0: 				break;
michael@0: 			newt = t + SECSPERHOUR * 12;
michael@0: 			newtmp = localtime(&newt);
michael@0: 			if (newtmp != NULL)
michael@0: 				newtm = *newtmp;
michael@0: #ifdef ICU
michael@0: 			if (iflag) {
michael@0: 				/* We  do not want to capture transitions just for
michael@0: 				 * abbreviated zone name changes */
michael@0: 				if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
michael@0: 					(delta(&newtm, &tm) != (newt - t) ||
michael@0: 					newtm.tm_isdst != tm.tm_isdst)) {
michael@0: 						newt = huntICU(argv[i], t, newt, fp);
michael@0: 						newtmp = localtime(&newt);
michael@0: 						if (newtmp != NULL) {
michael@0: 							newtm = *newtmp;
michael@0: 							(void) strncpy(buf,
michael@0: 								abbr(&newtm),
michael@0: 								(sizeof buf) - 1);
michael@0: 						}
michael@0: 				}
michael@0: 			} else {
michael@0: #endif
michael@0: 			if ((tmp == NULL || newtmp == NULL) ? (tmp != newtmp) :
michael@0: 				(delta(&newtm, &tm) != (newt - t) ||
michael@0: 				newtm.tm_isdst != tm.tm_isdst ||
michael@0: 				strcmp(abbr(&newtm), buf) != 0)) {
michael@0: 					newt = hunt(argv[i], t, newt);
michael@0: 					newtmp = localtime(&newt);
michael@0: 					if (newtmp != NULL) {
michael@0: 						newtm = *newtmp;
michael@0: 						(void) strncpy(buf,
michael@0: 							abbr(&newtm),
michael@0: 							(sizeof buf) - 1);
michael@0: 					}
michael@0: 			}
michael@0: #ifdef ICU
michael@0: 			}
michael@0: #endif
michael@0: 			t = newt;
michael@0: 			tm = newtm;
michael@0: 			tmp = newtmp;
michael@0: 		}
michael@0: #ifdef ICU
michael@0: 		if (!iflag) {
michael@0: 		/* skip displaying info for the highest time, which is actually not
michael@0: 		 * a transition when -i option is used*/
michael@0: #endif
michael@0: 		t = absolute_max_time;
michael@0: 		t -= SECSPERHOUR * HOURSPERDAY;
michael@0: 		show(argv[i], t, TRUE);
michael@0: 		t += SECSPERHOUR * HOURSPERDAY;
michael@0: 		show(argv[i], t, TRUE);
michael@0: 
michael@0: #ifdef ICU
michael@0: 		}
michael@0: 		/* close file */
michael@0: 		if (fp != NULL) {
michael@0: 			fclose(fp);
michael@0: 		}
michael@0: #endif
michael@0: 	}
michael@0: 	if (fflush(stdout) || ferror(stdout)) {
michael@0: 		(void) fprintf(stderr, "%s: ", progname);
michael@0: 		(void) perror(_("Error writing to standard output"));
michael@0: 		exit(EXIT_FAILURE);
michael@0: 	}
michael@0: #ifdef ICU
michael@0: 	if (aflag) {
michael@0: 		struct listentry *	entry = namelist;
michael@0: 		struct listentry *	next;
michael@0: 		while (entry != NULL) {
michael@0: 			free(entry->name);
michael@0: 			next = entry->next;
michael@0: 			free(entry);
michael@0: 			entry = next;
michael@0: 		}
michael@0: 	}
michael@0: #endif
michael@0: 	exit(EXIT_SUCCESS);
michael@0: 	/* If exit fails to exit... */
michael@0: 	return EXIT_FAILURE;
michael@0: }
michael@0: 
michael@0: static void
michael@0: setabsolutes(void)
michael@0: {
michael@0: 	if (0.5 == (time_t) 0.5) {
michael@0: 		/*
michael@0: 		** time_t is floating.
michael@0: 		*/
michael@0: 		if (sizeof (time_t) == sizeof (float)) {
michael@0: 			absolute_min_time = (time_t) -FLT_MAX;
michael@0: 			absolute_max_time = (time_t) FLT_MAX;
michael@0: 		} else if (sizeof (time_t) == sizeof (double)) {
michael@0: 			absolute_min_time = (time_t) -DBL_MAX;
michael@0: 			absolute_max_time = (time_t) DBL_MAX;
michael@0: 		} else {
michael@0: 			(void) fprintf(stderr,
michael@0: _("%s: use of -v on system with floating time_t other than float or double\n"),
michael@0: 				progname);
michael@0: 			exit(EXIT_FAILURE);
michael@0: 		}
michael@0: 	} else if (0 > (time_t) -1) {
michael@0: 		/*
michael@0: 		** time_t is signed.  Assume overflow wraps around.
michael@0: 		*/
michael@0: 		time_t t = 0;
michael@0: 		time_t t1 = 1;
michael@0: 
michael@0: 		while (t < t1) {
michael@0: 			t = t1;
michael@0: 			t1 = 2 * t1 + 1;
michael@0: 		}
michael@0: 
michael@0: 		absolute_max_time = t;
michael@0: 		t = -t;
michael@0: 		absolute_min_time = t - 1;
michael@0: 		if (t < absolute_min_time)
michael@0: 			absolute_min_time = t;
michael@0: 	} else {
michael@0: 		/*
michael@0: 		** time_t is unsigned.
michael@0: 		*/
michael@0: 		absolute_min_time = 0;
michael@0: 		absolute_max_time = absolute_min_time - 1;
michael@0: 	}
michael@0: }
michael@0: 
michael@0: static time_t
michael@0: yeartot(y)
michael@0: const long	y;
michael@0: {
michael@0: 	register long	myy;
michael@0: 	register long	seconds;
michael@0: 	register time_t	t;
michael@0: 
michael@0: 	myy = EPOCH_YEAR;
michael@0: 	t = 0;
michael@0: 	while (myy != y) {
michael@0: 		if (myy < y) {
michael@0: 			seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
michael@0: 			++myy;
michael@0: 			if (t > absolute_max_time - seconds) {
michael@0: 				t = absolute_max_time;
michael@0: 				break;
michael@0: 			}
michael@0: 			t += seconds;
michael@0: 		} else {
michael@0: 			--myy;
michael@0: 			seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
michael@0: 			if (t < absolute_min_time + seconds) {
michael@0: 				t = absolute_min_time;
michael@0: 				break;
michael@0: 			}
michael@0: 			t -= seconds;
michael@0: 		}
michael@0: 	}
michael@0: 	return t;
michael@0: }
michael@0: 
michael@0: static time_t
michael@0: hunt(char *name, time_t lot, time_t hit)
michael@0: {
michael@0: 	time_t			t;
michael@0: 	long			diff;
michael@0: 	struct tm		lotm;
michael@0: 	register struct tm *	lotmp;
michael@0: 	struct tm		tm;
michael@0: 	register struct tm *	tmp;
michael@0: 	char			loab[MAX_STRING_LENGTH];
michael@0: 
michael@0: 	lotmp = my_localtime(&lot);
michael@0: 	if (lotmp != NULL) {
michael@0: 		lotm = *lotmp;
michael@0: 		(void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
michael@0: 	}
michael@0: 	for ( ; ; ) {
michael@0: 		diff = (long) (hit - lot);
michael@0: 		if (diff < 2)
michael@0: 			break;
michael@0: 		t = lot;
michael@0: 		t += diff / 2;
michael@0: 		if (t <= lot)
michael@0: 			++t;
michael@0: 		else if (t >= hit)
michael@0: 			--t;
michael@0: 		tmp = my_localtime(&t);
michael@0: 		if (tmp != NULL)
michael@0: 			tm = *tmp;
michael@0: 		if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
michael@0: 			(delta(&tm, &lotm) == (t - lot) &&
michael@0: 			tm.tm_isdst == lotm.tm_isdst &&
michael@0: 			strcmp(abbr(&tm), loab) == 0)) {
michael@0: 				lot = t;
michael@0: 				lotm = tm;
michael@0: 				lotmp = tmp;
michael@0: 		} else	hit = t;
michael@0: 	}
michael@0: 	show(name, lot, TRUE);
michael@0: 	show(name, hit, TRUE);
michael@0: 	return hit;
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** Thanks to Paul Eggert for logic used in delta.
michael@0: */
michael@0: 
michael@0: static long
michael@0: delta(newp, oldp)
michael@0: struct tm *	newp;
michael@0: struct tm *	oldp;
michael@0: {
michael@0: 	register long	result;
michael@0: 	register int	tmy;
michael@0: 
michael@0: 	if (newp->tm_year < oldp->tm_year)
michael@0: 		return -delta(oldp, newp);
michael@0: 	result = 0;
michael@0: 	for (tmy = oldp->tm_year; tmy < newp->tm_year; ++tmy)
michael@0: 		result += DAYSPERNYEAR + isleap_sum(tmy, TM_YEAR_BASE);
michael@0: 	result += newp->tm_yday - oldp->tm_yday;
michael@0: 	result *= HOURSPERDAY;
michael@0: 	result += newp->tm_hour - oldp->tm_hour;
michael@0: 	result *= MINSPERHOUR;
michael@0: 	result += newp->tm_min - oldp->tm_min;
michael@0: 	result *= SECSPERMIN;
michael@0: 	result += newp->tm_sec - oldp->tm_sec;
michael@0: 	return result;
michael@0: }
michael@0: 
michael@0: static void
michael@0: show(char *zone, time_t t, int v)
michael@0: {
michael@0: 	register struct tm *	tmp;
michael@0: 
michael@0: 	(void) printf("%-*s  ", (int) longest, zone);
michael@0: 	if (v) {
michael@0: 		tmp = gmtime(&t);
michael@0: 		if (tmp == NULL) {
michael@0: 			(void) printf(tformat(), t);
michael@0: 		} else {
michael@0: 			dumptime(tmp);
michael@0: 			(void) printf(" UTC");
michael@0: 		}
michael@0: 		(void) printf(" = ");
michael@0: 	}
michael@0: 	tmp = my_localtime(&t);
michael@0: 	dumptime(tmp);
michael@0: 	if (tmp != NULL) {
michael@0: 		if (*abbr(tmp) != '\0')
michael@0: 			(void) printf(" %s", abbr(tmp));
michael@0: 		if (v) {
michael@0: 			(void) printf(" isdst=%d", tmp->tm_isdst);
michael@0: #ifdef TM_GMTOFF
michael@0: 			(void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
michael@0: #endif /* defined TM_GMTOFF */
michael@0: 		}
michael@0: 	}
michael@0: 	(void) printf("\n");
michael@0: 	if (tmp != NULL && *abbr(tmp) != '\0')
michael@0: 		abbrok(abbr(tmp), zone);
michael@0: }
michael@0: 
michael@0: static char *
michael@0: abbr(tmp)
michael@0: struct tm *	tmp;
michael@0: {
michael@0: 	register char *	result;
michael@0: 	static char	nada;
michael@0: 
michael@0: 	if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
michael@0: 		return &nada;
michael@0: 	result = tzname[tmp->tm_isdst];
michael@0: 	return (result == NULL) ? &nada : result;
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** The code below can fail on certain theoretical systems;
michael@0: ** it works on all known real-world systems as of 2004-12-30.
michael@0: */
michael@0: 
michael@0: static const char *
michael@0: tformat(void)
michael@0: {
michael@0: 	if (0.5 == (time_t) 0.5) {	/* floating */
michael@0: 		if (sizeof (time_t) > sizeof (double))
michael@0: 			return "%Lg";
michael@0: 		return "%g";
michael@0: 	}
michael@0: 	if (0 > (time_t) -1) {		/* signed */
michael@0: 		if (sizeof (time_t) > sizeof (long))
michael@0: 			return "%lld";
michael@0: 		if (sizeof (time_t) > sizeof (int))
michael@0: 			return "%ld";
michael@0: 		return "%d";
michael@0: 	}
michael@0: 	if (sizeof (time_t) > sizeof (unsigned long))
michael@0: 		return "%llu";
michael@0: 	if (sizeof (time_t) > sizeof (unsigned int))
michael@0: 		return "%lu";
michael@0: 	return "%u";
michael@0: }
michael@0: 
michael@0: static void
michael@0: dumptime(timeptr)
michael@0: register const struct tm *	timeptr;
michael@0: {
michael@0: 	static const char	wday_name[][3] = {
michael@0: 		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
michael@0: 	};
michael@0: 	static const char	mon_name[][3] = {
michael@0: 		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
michael@0: 		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
michael@0: 	};
michael@0: 	register const char *	wn;
michael@0: 	register const char *	mn;
michael@0: 	register int		lead;
michael@0: 	register int		trail;
michael@0: 
michael@0: 	if (timeptr == NULL) {
michael@0: 		(void) printf("NULL");
michael@0: 		return;
michael@0: 	}
michael@0: 	/*
michael@0: 	** The packaged versions of localtime and gmtime never put out-of-range
michael@0: 	** values in tm_wday or tm_mon, but since this code might be compiled
michael@0: 	** with other (perhaps experimental) versions, paranoia is in order.
michael@0: 	*/
michael@0: 	if (timeptr->tm_wday < 0 || timeptr->tm_wday >=
michael@0: 		(int) (sizeof wday_name / sizeof wday_name[0]))
michael@0: 			wn = "???";
michael@0: 	else		wn = wday_name[timeptr->tm_wday];
michael@0: 	if (timeptr->tm_mon < 0 || timeptr->tm_mon >=
michael@0: 		(int) (sizeof mon_name / sizeof mon_name[0]))
michael@0: 			mn = "???";
michael@0: 	else		mn = mon_name[timeptr->tm_mon];
michael@0: 	(void) printf("%.3s %.3s%3d %.2d:%.2d:%.2d ",
michael@0: 		wn, mn,
michael@0: 		timeptr->tm_mday, timeptr->tm_hour,
michael@0: 		timeptr->tm_min, timeptr->tm_sec);
michael@0: #define DIVISOR	10
michael@0: 	trail = timeptr->tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
michael@0: 	lead = timeptr->tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR +
michael@0: 		trail / DIVISOR;
michael@0: 	trail %= DIVISOR;
michael@0: 	if (trail < 0 && lead > 0) {
michael@0: 		trail += DIVISOR;
michael@0: 		--lead;
michael@0: 	} else if (lead < 0 && trail > 0) {
michael@0: 		trail -= DIVISOR;
michael@0: 		++lead;
michael@0: 	}
michael@0: 	if (lead == 0)
michael@0: 		(void) printf("%d", trail);
michael@0: 	else	(void) printf("%d%d", lead, ((trail < 0) ? -trail : trail));
michael@0: }
michael@0: 
michael@0: #ifdef ICU
michael@0: static time_t
michael@0: huntICU(char *name, time_t lot, time_t hit, FILE * fp)
michael@0: {
michael@0: 	time_t			t;
michael@0: 	long			diff;
michael@0: 	struct tm		lotm;
michael@0: 	register struct tm *	lotmp;
michael@0: 	struct tm		tm;
michael@0: 	register struct tm *	tmp;
michael@0: 	char			loab[MAX_STRING_LENGTH];
michael@0: 
michael@0: 	lotmp = my_localtime(&lot);
michael@0: 	if (lotmp != NULL) {
michael@0: 		lotm = *lotmp;
michael@0: 		(void) strncpy(loab, abbr(&lotm), (sizeof loab) - 1);
michael@0: 	}
michael@0: 	for ( ; ; ) {
michael@0: 		diff = (long) (hit - lot);
michael@0: 		if (diff < 2)
michael@0: 			break;
michael@0: 		t = lot;
michael@0: 		t += diff / 2;
michael@0: 		if (t <= lot)
michael@0: 			++t;
michael@0: 		else if (t >= hit)
michael@0: 			--t;
michael@0: 		tmp = my_localtime(&t);
michael@0: 		if (tmp != NULL)
michael@0: 			tm = *tmp;
michael@0: 		/* We  do not want to capture transitions just for
michael@0: 		 * abbreviated zone name changes */
michael@0: 		if ((lotmp == NULL || tmp == NULL) ? (lotmp == tmp) :
michael@0: 			(delta(&tm, &lotm) == (t - lot) &&
michael@0: 			tm.tm_isdst == lotm.tm_isdst)) {
michael@0: 				lot = t;
michael@0: 				lotm = tm;
michael@0: 				lotmp = tmp;
michael@0: 		} else	hit = t;
michael@0: 	}
michael@0: 	showICU(fp, name, lot, hit);
michael@0: 	return hit;
michael@0: }
michael@0: 
michael@0: static void showICU(FILE * fp, char *zone, time_t t1, time_t t2)
michael@0: {
michael@0: 	if (fp == NULL) {
michael@0: 		fp = stdout;
michael@0: 	}
michael@0: 	dumptimeICU(fp, t1);
michael@0: 	fprintf(fp, " > ");
michael@0: 	dumptimeICU(fp, t2);
michael@0: 	fprintf(fp, "\n");
michael@0: }
michael@0: 
michael@0: static void dumptimeICU(FILE * fp, time_t t)
michael@0: {
michael@0: 	static const char	wday_name[][3] = {
michael@0: 		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
michael@0: 	};
michael@0: 	struct tm gmt;
michael@0: 	struct tm loc;
michael@0: 	register int		lead;
michael@0: 	register int		trail;
michael@0: 	long	offset;
michael@0: 	long	hour, min, sec;
michael@0: 
michael@0: 	loc = *my_localtime(&t);
michael@0: 
michael@0: 	trail = loc.tm_year % DIVISOR + TM_YEAR_BASE % DIVISOR;
michael@0: 	lead = loc.tm_year / DIVISOR + TM_YEAR_BASE / DIVISOR + trail / DIVISOR;
michael@0: 	trail %= DIVISOR;
michael@0: 	if (trail < 0 && lead > 0) {
michael@0: 		trail += DIVISOR;
michael@0: 		--lead;
michael@0: 	} else if (lead < 0 && trail > 0) {
michael@0: 		trail -= DIVISOR;
michael@0: 		++lead;
michael@0: 	}
michael@0: 
michael@0: 	fprintf(fp, "%04d-%02d-%02d", lead * DIVISOR + trail, loc.tm_mon + 1, loc.tm_mday);
michael@0: 	fprintf(fp, " %.3s ", wday_name[loc.tm_wday]);
michael@0: 	fprintf(fp, "%02d:%02d:%02d", loc.tm_hour, loc.tm_min, loc.tm_sec);
michael@0: 
michael@0: 	gmt = *gmtime(&t);
michael@0: 	offset = delta(&loc, &gmt);
michael@0: 	if (offset < 0) {
michael@0: 		offset = -offset;
michael@0: 		fprintf(fp, "-");
michael@0: 	} else {
michael@0: 		fprintf(fp, "+");
michael@0: 	}
michael@0: 
michael@0: 	sec = offset % 60;
michael@0: 	offset = (offset - sec) / 60;
michael@0: 	min = offset % 60;
michael@0: 	hour = offset / 60;
michael@0: 	
michael@0: 	fprintf(fp, "%02d", hour);
michael@0: 	fprintf(fp, "%02d", min);
michael@0: 	fprintf(fp, "%02d", sec);
michael@0: 	fprintf(fp, "[DST=%d]", loc.tm_isdst);
michael@0: }
michael@0: 
michael@0: static int getall(struct listentry ** namelist) {
michael@0: 	int count = 0;
michael@0: 	struct listentry dummyentry;
michael@0: 	struct listentry *	last = &dummyentry;
michael@0: 
michael@0: 	getzones(TZDIR, NULL, &last, &count);
michael@0: 	if (count > 0) {
michael@0: 		*namelist = dummyentry.next;
michael@0: 	}
michael@0: 
michael@0: 	return count;
michael@0: }
michael@0: 
michael@0: static void getzones(char * basedir, char * relpath, struct listentry ** last, int * count) {
michael@0: 	char	path[FILENAME_MAX + 1];
michael@0: 	struct	dirent *	dir;
michael@0: 	DIR *	dp;
michael@0: 
michael@0: 	strcpy(path, basedir);
michael@0: 	if (relpath != NULL) {
michael@0: 		strcat(path, "/");
michael@0: 		strcat(path, relpath);
michael@0: 	}
michael@0: 
michael@0: 	if ((dp = opendir(path)) == NULL) {
michael@0: 		/* file */
michael@0: 		if (strstr(relpath, ".tab") == NULL && strcmp(relpath, "Etc/Unknown") != 0) {
michael@0: 			char *		pzonename;
michael@0: 			listentry *	pentry;
michael@0: 
michael@0: 			if ((pzonename = malloc(strlen(relpath) + 1)) == NULL) {
michael@0: 				exit(EXIT_FAILURE);
michael@0: 			}
michael@0: 			strcpy(pzonename, relpath);
michael@0: 		
michael@0: 			if ((pentry = malloc(sizeof(listentry))) == NULL) {
michael@0: 				exit(EXIT_FAILURE);
michael@0: 			}
michael@0: 
michael@0: 			pentry->name = pzonename;
michael@0: 			pentry->next = NULL;
michael@0: 			(*last)->next = pentry;
michael@0: 			*last = pentry;
michael@0: 			(*count)++;
michael@0: 		}
michael@0: 	} else {
michael@0: 		/* directory */
michael@0: 		while ((dir = readdir(dp)) != NULL) {
michael@0: 			char	subpath[FILENAME_MAX + 1];
michael@0: 
michael@0: 			if (strcmp(dir->d_name, ".") == 0
michael@0: 				|| strcmp(dir->d_name, "..") == 0) {
michael@0: 				continue;
michael@0: 			}
michael@0: 			if (relpath != NULL) {
michael@0: 				strcpy(subpath, relpath);
michael@0: 				strcat(subpath, "/");
michael@0: 				strcat(subpath, dir->d_name);
michael@0: 			} else {
michael@0: 				strcpy(subpath, dir->d_name);
michael@0: 			}
michael@0: 			getzones(basedir, subpath, last, count);
michael@0: 		}
michael@0: 		closedir(dp);
michael@0: 	}
michael@0: }
michael@0: #endif