The Tor Browser: intl/icu/source/tools/tzcode/zdump.c@fc2d59ddac77 (annotated)

intl/icu/source/tools/tzcode/zdump.c@fc2d59ddac77 (annotated)

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

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

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

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intl/icu/source/tools/tzcode/zdump.c@fc2d59ddac77 (annotated)

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