static char elsieid[] = "@(#)zdump.c 8.3"; | |
/* | |
** 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) | |
#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 */ | |
#ifndef P | |
#define P(x) x | |
#endif /* !defined P */ | |
extern char ** environ; | |
extern int getopt P((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 P((struct tm * tmp)); | |
static void abbrok P((const char * abbrp, const char * zone)); | |
static long delta P((struct tm * newp, struct tm * oldp)); | |
static void dumptime P((const struct tm * tmp)); | |
static time_t hunt P((char * name, time_t lot, time_t hit)); | |
static void setabsolutes P((void)); | |
static void show P((char * zone, time_t t, int v)); | |
static const char * tformat P((void)); | |
static time_t yeartot P((long y)); | |
#ifdef ICU | |
typedef struct listentry { | |
char * name; | |
struct listentry * next; | |
} listentry; | |
static time_t huntICU P((char * name, time_t lot, time_t hit, FILE *fp)); | |
static void dumptimeICU P((FILE * fp, time_t t)); | |
static void showICU P((FILE * fp, char * zone, time_t t1, time_t t2)); | |
static int getall P((struct listentry ** namelist)); | |
static void getzones P((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; | |
} | |
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); | |
} | |
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)) { | |
(void) fprintf(stderr, | |
_("%s: usage is %s [ --version ] [ -v ] [ -c [loyear,]hiyear ] zonename ...\n"), | |
progname, progname); | |
exit(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) | |
break; | |
newt = t + SECSPERHOUR * 12; | |
if (newt >= cuthitime) | |
break; | |
if (newt <= t) | |
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 | |
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() | |
{ | |
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() | |
{ | |
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) { | |
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 |