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-rw-r--r--intl/icu/source/tools/tzcode/zdump.c1089
1 files changed, 1089 insertions, 0 deletions
diff --git a/intl/icu/source/tools/tzcode/zdump.c b/intl/icu/source/tools/tzcode/zdump.c
new file mode 100644
index 0000000000..ebd7a5ce32
--- /dev/null
+++ b/intl/icu/source/tools/tzcode/zdump.c
@@ -0,0 +1,1089 @@
+/*
+** This file is in the public domain, so clarified as of
+** 2009-05-17 by Arthur David Olson.
+*/
+
+#include "version.h"
+
+/*
+** 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.
+**
+** However, include private.h when debugging, so that it overrides
+** time_t consistently with the rest of the package.
+*/
+
+#ifdef time_tz
+# include "private.h"
+#endif
+
+#include <stdbool.h>
+
+#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 "limits.h" /* for CHAR_BIT, LLONG_MAX */
+#include "ctype.h" /* for isalpha et al. */
+
+/* Enable extensions and modifications for ICU. */
+#define ICU
+
+#ifdef ICU
+#include "dirent.h"
+#include "sys/stat.h"
+#endif
+
+#ifndef isascii
+#define isascii(x) 1
+#endif /* !defined isascii */
+
+/*
+** Substitutes for pre-C99 compilers.
+** Much of this section of code is stolen from private.h.
+*/
+
+#ifndef HAVE_STDINT_H
+# define HAVE_STDINT_H \
+ (199901 <= __STDC_VERSION__ || 2 < (__GLIBC__ + (0 < __GLIBC_MINOR__)))
+#endif
+#if HAVE_STDINT_H
+# include "stdint.h"
+#endif
+#ifndef HAVE_INTTYPES_H
+# define HAVE_INTTYPES_H HAVE_STDINT_H
+#endif
+#if HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
+
+#ifndef INT_FAST32_MAX
+# if INT_MAX >> 31 == 0
+typedef long int_fast32_t;
+# else
+typedef int int_fast32_t;
+# endif
+#endif
+
+#ifndef INTMAX_MAX
+# if defined LLONG_MAX || defined __LONG_LONG_MAX__
+typedef long long intmax_t;
+# define strtoimax strtoll
+# define PRIdMAX "lld"
+# ifdef LLONG_MAX
+# define INTMAX_MAX LLONG_MAX
+# else
+# define INTMAX_MAX __LONG_LONG_MAX__
+# endif
+# else
+typedef long intmax_t;
+# define strtoimax strtol
+# define PRIdMAX "ld"
+# define INTMAX_MAX LONG_MAX
+# endif
+#endif
+
+
+#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 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 ((int_fast32_t) SECSPERHOUR * HOURSPERDAY)
+#define SECSPERNYEAR (SECSPERDAY * DAYSPERNYEAR)
+#define SECSPERLYEAR (SECSPERNYEAR + SECSPERDAY)
+#define SECSPER400YEARS (SECSPERNYEAR * (intmax_t) (300 + 3) \
+ + SECSPERLYEAR * (intmax_t) (100 - 3))
+
+/*
+** True if SECSPER400YEARS is known to be representable as an
+** intmax_t. It's OK that SECSPER400YEARS_FITS can in theory be false
+** even if SECSPER400YEARS is representable, because when that happens
+** the code merely runs a bit more slowly, and this slowness doesn't
+** occur on any practical platform.
+*/
+enum { SECSPER400YEARS_FITS = SECSPERLYEAR <= INTMAX_MAX / 400 };
+
+#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 */
+
+#if 2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__)
+# define ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define ATTRIBUTE_PURE /* empty */
+#endif
+
+/*
+** 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];
+
+/* The minimum and maximum finite time values. */
+static time_t const absolute_min_time =
+ ((time_t) -1 < 0
+ ? (time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1)
+ : 0);
+static time_t const absolute_max_time =
+ ((time_t) -1 < 0
+ ? - (~ 0 < 0) - ((time_t) -1 << (CHAR_BIT * sizeof (time_t) - 1))
+ : -1);
+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 intmax_t delta(struct tm * newp, struct tm * oldp) ATTRIBUTE_PURE;
+static void dumptime(const struct tm * tmp);
+static time_t hunt(char * name, time_t lot, time_t hit);
+static void show(char * zone, time_t t, int v);
+static const char * tformat(void);
+static time_t yeartot(intmax_t y) ATTRIBUTE_PURE;
+#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(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) {
+ (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(const char *const abbrp, const char *const zone)
+{
+ register const char * cp;
+ register const 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(FILE * const stream, const int status)
+{
+ (void) fprintf(stream,
+_("%s: usage: %s [--version] [--help] [-{vV}] [-{ct} [lo,]hi] zonename ...\n"
+ "\n"
+ "Report bugs to %s.\n"),
+ progname, progname, REPORT_BUGS_TO);
+ exit(status);
+}
+
+int
+main(int argc, char *argv[])
+{
+ register int i;
+ register int vflag;
+ register int Vflag;
+ register char * cutarg;
+ register char * cuttimes;
+ 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
+
+ cutlotime = absolute_min_time;
+ cuthitime = absolute_max_time;
+#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("zdump %s%s\n", PKGVERSION, TZVERSION);
+ exit(EXIT_SUCCESS);
+ } else if (strcmp(argv[i], "--help") == 0) {
+ usage(stdout, EXIT_SUCCESS);
+ }
+ vflag = Vflag = 0;
+ cutarg = cuttimes = NULL;
+#ifdef ICU
+ aflag = 0;
+ iflag = 0;
+ dirarg = NULL;
+ for (;;)
+ switch(getopt(argc, argv, "ac:d:it:vV")) {
+ case 'a': aflag = 1; break;
+ case 'c': cutarg = optarg; break;
+ case 'd': dirarg = optarg; break;
+ case 'i': iflag = 1; break;
+ case 't': cuttimes = optarg; break;
+ case 'v': vflag = 1; break;
+ case 'V': Vflag = 1; break;
+ case -1:
+ if (! (optind == argc - 1 && strcmp(argv[optind], "=") == 0))
+ goto arg_processing_done;
+ /* Fall through. */
+ default:
+ (void) fprintf(stderr,
+ _("%s: usage is %s [ --version ] [ -a ] [ -v ] [ -V ] [ -i ] [ -c [loyear,]hiyear ] [ -t [lotime,]hitime] ][ -d dir ] [ zonename ... ]\n"),
+ progname, progname);
+ exit(EXIT_FAILURE);
+ }
+#else
+ for (;;)
+ switch (getopt(argc, argv, "c:t:vV")) {
+ case 'c': cutarg = optarg; break;
+ case 't': cuttimes = optarg; break;
+ case 'v': vflag = 1; break;
+ case 'V': Vflag = 1; break;
+ case -1:
+ if (! (optind == argc - 1 && strcmp(argv[optind], "=") == 0))
+ goto arg_processing_done;
+ /* Fall through. */
+ default:
+ usage(stderr, EXIT_FAILURE);
+ }
+#endif
+ arg_processing_done:;
+
+#ifdef ICU
+ 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);
+ }
+#endif
+
+ if (vflag | Vflag) {
+ intmax_t lo;
+ intmax_t hi;
+ char *loend, *hiend;
+ register intmax_t cutloyear = ZDUMP_LO_YEAR;
+ register intmax_t cuthiyear = ZDUMP_HI_YEAR;
+ if (cutarg != NULL) {
+ lo = strtoimax(cutarg, &loend, 10);
+ if (cutarg != loend && !*loend) {
+ hi = lo;
+ cuthiyear = hi;
+ } else if (cutarg != loend && *loend == ','
+ && (hi = strtoimax(loend + 1, &hiend, 10),
+ loend + 1 != hiend && !*hiend)) {
+ cutloyear = lo;
+ cuthiyear = hi;
+ } else {
+(void) fprintf(stderr, _("%s: wild -c argument %s\n"),
+ progname, cutarg);
+ exit(EXIT_FAILURE);
+ }
+ }
+ if (cutarg != NULL || cuttimes == NULL) {
+ cutlotime = yeartot(cutloyear);
+ cuthitime = yeartot(cuthiyear);
+ }
+ if (cuttimes != NULL) {
+ lo = strtoimax(cuttimes, &loend, 10);
+ if (cuttimes != loend && !*loend) {
+ hi = lo;
+ if (hi < cuthitime) {
+ if (hi < absolute_min_time)
+ hi = absolute_min_time;
+ cuthitime = hi;
+ }
+ } else if (cuttimes != loend && *loend == ','
+ && (hi = strtoimax(loend + 1, &hiend, 10),
+ loend + 1 != hiend && !*hiend)) {
+ if (cutlotime < lo) {
+ if (absolute_max_time < lo)
+ lo = absolute_max_time;
+ cutlotime = lo;
+ }
+ if (hi < cuthitime) {
+ if (hi < absolute_min_time)
+ hi = absolute_min_time;
+ cuthitime = hi;
+ }
+ } else {
+ (void) fprintf(stderr,
+ _("%s: wild -t argument %s\n"),
+ progname, cuttimes);
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
+
+#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 = malloc((i + 2) * sizeof *fakeenv);
+ if (fakeenv == NULL
+ || (fakeenv[0] = 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 | 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
+ if (!Vflag) {
+ show(argv[i], t, true);
+ t += SECSPERDAY;
+ 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 ( ; ; ) {
+ newt = (t < absolute_max_time - SECSPERDAY / 2
+ ? t + SECSPERDAY / 2
+ : absolute_max_time);
+ if (cuthitime <= newt)
+ break;
+ 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
+ if (!Vflag) {
+ t = absolute_max_time;
+ t -= SECSPERDAY;
+ show(argv[i], t, true);
+ t += SECSPERDAY;
+ 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 time_t
+yeartot(const intmax_t y)
+{
+ register intmax_t myy, seconds, years;
+ register time_t t;
+
+ myy = EPOCH_YEAR;
+ t = 0;
+ while (myy < y) {
+ if (SECSPER400YEARS_FITS && 400 <= y - myy) {
+ intmax_t diff400 = (y - myy) / 400;
+ if (INTMAX_MAX / SECSPER400YEARS < diff400)
+ return absolute_max_time;
+ seconds = diff400 * SECSPER400YEARS;
+ years = diff400 * 400;
+ } else {
+ seconds = isleap(myy) ? SECSPERLYEAR : SECSPERNYEAR;
+ years = 1;
+ }
+ myy += years;
+ if (t > absolute_max_time - seconds)
+ return absolute_max_time;
+ t += seconds;
+ }
+ while (y < myy) {
+ if (SECSPER400YEARS_FITS && y + 400 <= myy && myy < 0) {
+ intmax_t diff400 = (myy - y) / 400;
+ if (INTMAX_MAX / SECSPER400YEARS < diff400)
+ return absolute_min_time;
+ seconds = diff400 * SECSPER400YEARS;
+ years = diff400 * 400;
+ } else {
+ seconds = isleap(myy - 1) ? SECSPERLYEAR : SECSPERNYEAR;
+ years = 1;
+ }
+ myy -= years;
+ if (t < absolute_min_time + seconds)
+ return absolute_min_time;
+ t -= seconds;
+ }
+ return t;
+}
+
+static time_t
+hunt(char *name, time_t lot, time_t hit)
+{
+ time_t t;
+ 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 ( ; ; ) {
+ time_t diff = 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 intmax_t
+delta(struct tm * newp, struct tm *oldp)
+{
+ register intmax_t 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(" UT");
+ }
+ (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(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 > (time_t) -1) { /* signed */
+ if (sizeof (time_t) == sizeof (intmax_t))
+ return "%"PRIdMAX;
+ if (sizeof (time_t) > sizeof (long))
+ return "%lld";
+ if (sizeof (time_t) > sizeof (int))
+ return "%ld";
+ return "%d";
+ }
+#ifdef PRIuMAX
+ if (sizeof (time_t) == sizeof (uintmax_t))
+ return "%"PRIuMAX;
+#endif
+ if (sizeof (time_t) > sizeof (unsigned long))
+ return "%llu";
+ if (sizeof (time_t) > sizeof (unsigned int))
+ return "%lu";
+ return "%u";
+}
+
+static void
+dumptime(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, "%02ld", hour);
+ fprintf(fp, "%02ld", min);
+ fprintf(fp, "%02ld", 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 05:41:32 +0000