#include <sys/cdefs.h>
#ifndef lint
#ifndef NOID
static char elsieid[] __unused = "@(#)localtime.c 7.78";
#endif
#endif
__FBSDID("$FreeBSD: src/lib/libc/stdtime/localtime.c,v 1.43 2008/04/01 06:56:11 davidxu Exp $");
#include "namespace.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pthread.h>
#include "private.h"
#include "un-namespace.h"
#include "tzfile.h"
#include "libc_private.h"
#define _MUTEX_LOCK(x) if (__isthreaded) _pthread_mutex_lock(x)
#define _MUTEX_UNLOCK(x) if (__isthreaded) _pthread_mutex_unlock(x)
#define _RWLOCK_RDLOCK(x) \
do { \
if (__isthreaded) _pthread_rwlock_rdlock(x); \
} while (0)
#define _RWLOCK_WRLOCK(x) \
do { \
if (__isthreaded) _pthread_rwlock_wrlock(x); \
} while (0)
#define _RWLOCK_UNLOCK(x) \
do { \
if (__isthreaded) _pthread_rwlock_unlock(x); \
} while (0)
#ifdef O_BINARY
#define OPEN_MODE (O_RDONLY | O_BINARY)
#endif
#ifndef O_BINARY
#define OPEN_MODE O_RDONLY
#endif
#ifndef WILDABBR
#define WILDABBR " "
#endif
static char wildabbr[] = "WILDABBR";
static const char gmt[] = "UTC";
#ifndef TZDEFRULESTRING
#define TZDEFRULESTRING ",M4.1.0,M10.5.0"
#endif
struct ttinfo {
long tt_gmtoff;
int tt_isdst;
int tt_abbrind;
int tt_ttisstd;
int tt_ttisgmt;
};
struct lsinfo {
time_t ls_trans;
long ls_corr;
};
#define BIGGEST(a, b) (((a) > (b)) ? (a) : (b))
#ifdef TZNAME_MAX
#define MY_TZNAME_MAX TZNAME_MAX
#endif
#ifndef TZNAME_MAX
#define MY_TZNAME_MAX 255
#endif
struct state {
int leapcnt;
int timecnt;
int typecnt;
int charcnt;
time_t ats[TZ_MAX_TIMES];
unsigned char types[TZ_MAX_TIMES];
struct ttinfo ttis[TZ_MAX_TYPES];
char chars[BIGGEST(BIGGEST(TZ_MAX_CHARS + 1, sizeof gmt),
(2 * (MY_TZNAME_MAX + 1)))];
struct lsinfo lsis[TZ_MAX_LEAPS];
};
struct rule {
int r_type;
int r_day;
int r_week;
int r_mon;
long r_time;
};
#define JULIAN_DAY 0
#define DAY_OF_YEAR 1
#define MONTH_NTH_DAY_OF_WEEK 2
static long detzcode(const char * codep);
static const char * getzname(const char * strp);
static const char * getnum(const char * strp, int * nump, int min,
int max);
static const char * getsecs(const char * strp, long * secsp);
static const char * getoffset(const char * strp, long * offsetp);
static const char * getrule(const char * strp, struct rule * rulep);
static void gmtload(struct state * sp);
static void gmtsub(const time_t * timep, long offset,
struct tm * tmp);
static void localsub(const time_t * timep, long offset,
struct tm * tmp);
static int increment_overflow(int * number, int delta);
static int normalize_overflow(int * tensptr, int * unitsptr,
int base);
static void settzname(void);
static time_t time1(struct tm * tmp,
void(*funcp) (const time_t *,
long, struct tm *),
long offset);
static time_t time2(struct tm *tmp,
void(*funcp) (const time_t *,
long, struct tm*),
long offset, int * okayp);
static time_t time2sub(struct tm *tmp,
void(*funcp) (const time_t *,
long, struct tm*),
long offset, int * okayp, int do_norm_secs);
static void timesub(const time_t * timep, long offset,
const struct state * sp, struct tm * tmp);
static int tmcomp(const struct tm * atmp,
const struct tm * btmp);
static time_t transtime(time_t janfirst, int year,
const struct rule * rulep, long offset);
static int tzload(const char * name, struct state * sp);
static int tzparse(const char * name, struct state * sp,
int lastditch);
#ifdef ALL_STATE
static struct state * lclptr;
static struct state * gmtptr;
#endif
#ifndef ALL_STATE
static struct state lclmem;
static struct state gmtmem;
#define lclptr (&lclmem)
#define gmtptr (&gmtmem)
#endif
#ifndef TZ_STRLEN_MAX
#define TZ_STRLEN_MAX 255
#endif
static char lcl_TZname[TZ_STRLEN_MAX + 1];
static int lcl_is_set;
static int gmt_is_set;
static pthread_rwlock_t lcl_rwlock = PTHREAD_RWLOCK_INITIALIZER;
static pthread_mutex_t gmt_mutex = PTHREAD_MUTEX_INITIALIZER;
char * tzname[2] = {
wildabbr,
wildabbr
};
static struct tm tm;
#ifdef USG_COMPAT
time_t timezone = 0;
int daylight = 0;
#endif
#ifdef ALTZONE
time_t altzone = 0;
#endif
static long
detzcode(codep)
const char * const codep;
{
long result;
int i;
result = (codep[0] & 0x80) ? ~0L : 0L;
for (i = 0; i < 4; ++i)
result = (result << 8) | (codep[i] & 0xff);
return result;
}
static void
settzname(void)
{
struct state * sp = lclptr;
int i;
tzname[0] = wildabbr;
tzname[1] = wildabbr;
#ifdef USG_COMPAT
daylight = 0;
timezone = 0;
#endif
#ifdef ALTZONE
altzone = 0;
#endif
#ifdef ALL_STATE
if (sp == NULL) {
tzname[0] = tzname[1] = gmt;
return;
}
#endif
for (i = 0; i < sp->typecnt; ++i) {
const struct ttinfo * const ttisp = &sp->ttis[i];
tzname[ttisp->tt_isdst] =
&sp->chars[ttisp->tt_abbrind];
#ifdef USG_COMPAT
if (ttisp->tt_isdst)
daylight = 1;
if (i == 0 || !ttisp->tt_isdst)
timezone = -(ttisp->tt_gmtoff);
#endif
#ifdef ALTZONE
if (i == 0 || ttisp->tt_isdst)
altzone = -(ttisp->tt_gmtoff);
#endif
}
for (i = 0; i < sp->timecnt; ++i) {
const struct ttinfo * const ttisp =
&sp->ttis[
sp->types[i]];
tzname[ttisp->tt_isdst] =
&sp->chars[ttisp->tt_abbrind];
}
}
static int
tzload(name, sp)
const char * name;
struct state * const sp;
{
const char * p;
int i;
int fid;
if (name != NULL && issetugid() != 0)
if ((name[0] == ':' && name[1] == '/') ||
name[0] == '/' || strchr(name, '.'))
name = NULL;
if (name == NULL && (name = TZDEFAULT) == NULL)
return -1;
{
int doaccess;
struct stat stab;
char fullname[FILENAME_MAX + 1];
if (name[0] == ':')
++name;
doaccess = name[0] == '/';
if (!doaccess) {
if ((p = TZDIR) == NULL)
return -1;
if ((strlen(p) + 1 + strlen(name) + 1) >= sizeof fullname)
return -1;
(void) strcpy(fullname, p);
(void) strcat(fullname, "/");
(void) strcat(fullname, name);
if (strchr(name, '.') != NULL)
doaccess = TRUE;
name = fullname;
}
if (doaccess && access(name, R_OK) != 0)
return -1;
if ((fid = _open(name, OPEN_MODE)) == -1)
return -1;
if ((_fstat(fid, &stab) < 0) || !S_ISREG(stab.st_mode)) {
_close(fid);
return -1;
}
}
{
struct tzhead * tzhp;
union {
struct tzhead tzhead;
char buf[sizeof *sp + sizeof *tzhp];
} u;
int ttisstdcnt;
int ttisgmtcnt;
i = _read(fid, u.buf, sizeof u.buf);
if (_close(fid) != 0)
return -1;
ttisstdcnt = (int) detzcode(u.tzhead.tzh_ttisstdcnt);
ttisgmtcnt = (int) detzcode(u.tzhead.tzh_ttisgmtcnt);
sp->leapcnt = (int) detzcode(u.tzhead.tzh_leapcnt);
sp->timecnt = (int) detzcode(u.tzhead.tzh_timecnt);
sp->typecnt = (int) detzcode(u.tzhead.tzh_typecnt);
sp->charcnt = (int) detzcode(u.tzhead.tzh_charcnt);
p = u.tzhead.tzh_charcnt + sizeof u.tzhead.tzh_charcnt;
if (sp->leapcnt < 0 || sp->leapcnt > TZ_MAX_LEAPS ||
sp->typecnt <= 0 || sp->typecnt > TZ_MAX_TYPES ||
sp->timecnt < 0 || sp->timecnt > TZ_MAX_TIMES ||
sp->charcnt < 0 || sp->charcnt > TZ_MAX_CHARS ||
(ttisstdcnt != sp->typecnt && ttisstdcnt != 0) ||
(ttisgmtcnt != sp->typecnt && ttisgmtcnt != 0))
return -1;
if (i - (p - u.buf) < sp->timecnt * 4 +
sp->timecnt +
sp->typecnt * (4 + 2) +
sp->charcnt +
sp->leapcnt * (4 + 4) +
ttisstdcnt +
ttisgmtcnt)
return -1;
for (i = 0; i < sp->timecnt; ++i) {
sp->ats[i] = detzcode(p);
p += 4;
}
for (i = 0; i < sp->timecnt; ++i) {
sp->types[i] = (unsigned char) *p++;
if (sp->types[i] >= sp->typecnt)
return -1;
}
for (i = 0; i < sp->typecnt; ++i) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
ttisp->tt_gmtoff = detzcode(p);
p += 4;
ttisp->tt_isdst = (unsigned char) *p++;
if (ttisp->tt_isdst != 0 && ttisp->tt_isdst != 1)
return -1;
ttisp->tt_abbrind = (unsigned char) *p++;
if (ttisp->tt_abbrind < 0 ||
ttisp->tt_abbrind > sp->charcnt)
return -1;
}
for (i = 0; i < sp->charcnt; ++i)
sp->chars[i] = *p++;
sp->chars[i] = '\0';
for (i = 0; i < sp->leapcnt; ++i) {
struct lsinfo * lsisp;
lsisp = &sp->lsis[i];
lsisp->ls_trans = detzcode(p);
p += 4;
lsisp->ls_corr = detzcode(p);
p += 4;
}
for (i = 0; i < sp->typecnt; ++i) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisstdcnt == 0)
ttisp->tt_ttisstd = FALSE;
else {
ttisp->tt_ttisstd = *p++;
if (ttisp->tt_ttisstd != TRUE &&
ttisp->tt_ttisstd != FALSE)
return -1;
}
}
for (i = 0; i < sp->typecnt; ++i) {
struct ttinfo * ttisp;
ttisp = &sp->ttis[i];
if (ttisgmtcnt == 0)
ttisp->tt_ttisgmt = FALSE;
else {
ttisp->tt_ttisgmt = *p++;
if (ttisp->tt_ttisgmt != TRUE &&
ttisp->tt_ttisgmt != FALSE)
return -1;
}
}
}
return 0;
}
static const int mon_lengths[2][MONSPERYEAR] = {
{ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
{ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
};
static const int year_lengths[2] = {
DAYSPERNYEAR, DAYSPERLYEAR
};
static const char *
getzname(strp)
const char * strp;
{
char c;
while ((c = *strp) != '\0' && !is_digit(c) && c != ',' && c != '-' &&
c != '+')
++strp;
return strp;
}
static const char *
getnum(strp, nump, min, max)
const char * strp;
int * const nump;
const int min;
const int max;
{
char c;
int num;
if (strp == NULL || !is_digit(c = *strp))
return NULL;
num = 0;
do {
num = num * 10 + (c - '0');
if (num > max)
return NULL;
c = *++strp;
} while (is_digit(c));
if (num < min)
return NULL;
*nump = num;
return strp;
}
static const char *
getsecs(strp, secsp)
const char * strp;
long * const secsp;
{
int num;
strp = getnum(strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
if (strp == NULL)
return NULL;
*secsp = num * (long) SECSPERHOUR;
if (*strp == ':') {
++strp;
strp = getnum(strp, &num, 0, MINSPERHOUR - 1);
if (strp == NULL)
return NULL;
*secsp += num * SECSPERMIN;
if (*strp == ':') {
++strp;
strp = getnum(strp, &num, 0, SECSPERMIN);
if (strp == NULL)
return NULL;
*secsp += num;
}
}
return strp;
}
static const char *
getoffset(strp, offsetp)
const char * strp;
long * const offsetp;
{
int neg = 0;
if (*strp == '-') {
neg = 1;
++strp;
} else if (*strp == '+')
++strp;
strp = getsecs(strp, offsetp);
if (strp == NULL)
return NULL;
if (neg)
*offsetp = -*offsetp;
return strp;
}
static const char *
getrule(strp, rulep)
const char * strp;
struct rule * const rulep;
{
if (*strp == 'J') {
rulep->r_type = JULIAN_DAY;
++strp;
strp = getnum(strp, &rulep->r_day, 1, DAYSPERNYEAR);
} else if (*strp == 'M') {
rulep->r_type = MONTH_NTH_DAY_OF_WEEK;
++strp;
strp = getnum(strp, &rulep->r_mon, 1, MONSPERYEAR);
if (strp == NULL)
return NULL;
if (*strp++ != '.')
return NULL;
strp = getnum(strp, &rulep->r_week, 1, 5);
if (strp == NULL)
return NULL;
if (*strp++ != '.')
return NULL;
strp = getnum(strp, &rulep->r_day, 0, DAYSPERWEEK - 1);
} else if (is_digit(*strp)) {
rulep->r_type = DAY_OF_YEAR;
strp = getnum(strp, &rulep->r_day, 0, DAYSPERLYEAR - 1);
} else return NULL;
if (strp == NULL)
return NULL;
if (*strp == '/') {
++strp;
strp = getsecs(strp, &rulep->r_time);
} else rulep->r_time = 2 * SECSPERHOUR;
return strp;
}
static time_t
transtime(janfirst, year, rulep, offset)
const time_t janfirst;
const int year;
const struct rule * const rulep;
const long offset;
{
int leapyear;
time_t value;
int i;
int d, m1, yy0, yy1, yy2, dow;
INITIALIZE(value);
leapyear = isleap(year);
switch (rulep->r_type) {
case JULIAN_DAY:
value = janfirst + (rulep->r_day - 1) * SECSPERDAY;
if (leapyear && rulep->r_day >= 60)
value += SECSPERDAY;
break;
case DAY_OF_YEAR:
value = janfirst + rulep->r_day * SECSPERDAY;
break;
case MONTH_NTH_DAY_OF_WEEK:
value = janfirst;
for (i = 0; i < rulep->r_mon - 1; ++i)
value += mon_lengths[leapyear][i] * SECSPERDAY;
m1 = (rulep->r_mon + 9) % 12 + 1;
yy0 = (rulep->r_mon <= 2) ? (year - 1) : year;
yy1 = yy0 / 100;
yy2 = yy0 % 100;
dow = ((26 * m1 - 2) / 10 +
1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7;
if (dow < 0)
dow += DAYSPERWEEK;
d = rulep->r_day - dow;
if (d < 0)
d += DAYSPERWEEK;
for (i = 1; i < rulep->r_week; ++i) {
if (d + DAYSPERWEEK >=
mon_lengths[leapyear][rulep->r_mon - 1])
break;
d += DAYSPERWEEK;
}
value += d * SECSPERDAY;
break;
}
return value + rulep->r_time + offset;
}
static int
tzparse(name, sp, lastditch)
const char * name;
struct state * const sp;
const int lastditch;
{
const char * stdname;
const char * dstname;
size_t stdlen;
size_t dstlen;
long stdoffset;
long dstoffset;
time_t * atp;
unsigned char * typep;
char * cp;
int load_result;
INITIALIZE(dstname);
stdname = name;
if (lastditch) {
stdlen = strlen(name);
name += stdlen;
if (stdlen >= sizeof sp->chars)
stdlen = (sizeof sp->chars) - 1;
stdoffset = 0;
} else {
name = getzname(name);
stdlen = name - stdname;
if (stdlen < 3)
return -1;
if (*name == '\0')
return -1;
else {
name = getoffset(name, &stdoffset);
if (name == NULL)
return -1;
}
}
load_result = tzload(TZDEFRULES, sp);
if (load_result != 0)
sp->leapcnt = 0;
if (*name != '\0') {
dstname = name;
name = getzname(name);
dstlen = name - dstname;
if (dstlen < 3)
return -1;
if (*name != '\0' && *name != ',' && *name != ';') {
name = getoffset(name, &dstoffset);
if (name == NULL)
return -1;
} else dstoffset = stdoffset - SECSPERHOUR;
if (*name == '\0' && load_result != 0)
name = TZDEFRULESTRING;
if (*name == ',' || *name == ';') {
struct rule start;
struct rule end;
int year;
time_t janfirst;
time_t starttime;
time_t endtime;
++name;
if ((name = getrule(name, &start)) == NULL)
return -1;
if (*name++ != ',')
return -1;
if ((name = getrule(name, &end)) == NULL)
return -1;
if (*name != '\0')
return -1;
sp->typecnt = 2;
sp->timecnt = 2 * (2037 - EPOCH_YEAR + 1);
if (sp->timecnt > TZ_MAX_TIMES)
return -1;
sp->ttis[0].tt_gmtoff = -dstoffset;
sp->ttis[0].tt_isdst = 1;
sp->ttis[0].tt_abbrind = stdlen + 1;
sp->ttis[1].tt_gmtoff = -stdoffset;
sp->ttis[1].tt_isdst = 0;
sp->ttis[1].tt_abbrind = 0;
atp = sp->ats;
typep = sp->types;
janfirst = 0;
for (year = EPOCH_YEAR; year <= 2037; ++year) {
starttime = transtime(janfirst, year, &start,
stdoffset);
endtime = transtime(janfirst, year, &end,
dstoffset);
if (starttime > endtime) {
*atp++ = endtime;
*typep++ = 1;
*atp++ = starttime;
*typep++ = 0;
} else {
*atp++ = starttime;
*typep++ = 0;
*atp++ = endtime;
*typep++ = 1;
}
janfirst += year_lengths[isleap(year)] *
SECSPERDAY;
}
} else {
long theirstdoffset;
long theirdstoffset;
long theiroffset;
int isdst;
int i;
int j;
if (*name != '\0')
return -1;
theirstdoffset = 0;
for (i = 0; i < sp->timecnt; ++i) {
j = sp->types[i];
if (!sp->ttis[j].tt_isdst) {
theirstdoffset =
-sp->ttis[j].tt_gmtoff;
break;
}
}
theirdstoffset = 0;
for (i = 0; i < sp->timecnt; ++i) {
j = sp->types[i];
if (sp->ttis[j].tt_isdst) {
theirdstoffset =
-sp->ttis[j].tt_gmtoff;
break;
}
}
isdst = FALSE;
theiroffset = theirstdoffset;
for (i = 0; i < sp->timecnt; ++i) {
j = sp->types[i];
sp->types[i] = sp->ttis[j].tt_isdst;
if (sp->ttis[j].tt_ttisgmt) {
} else {
if (isdst && !sp->ttis[j].tt_ttisstd) {
sp->ats[i] += dstoffset -
theirdstoffset;
} else {
sp->ats[i] += stdoffset -
theirstdoffset;
}
}
theiroffset = -sp->ttis[j].tt_gmtoff;
if (sp->ttis[j].tt_isdst)
theirdstoffset = theiroffset;
else theirstdoffset = theiroffset;
}
sp->ttis[0].tt_gmtoff = -stdoffset;
sp->ttis[0].tt_isdst = FALSE;
sp->ttis[0].tt_abbrind = 0;
sp->ttis[1].tt_gmtoff = -dstoffset;
sp->ttis[1].tt_isdst = TRUE;
sp->ttis[1].tt_abbrind = stdlen + 1;
sp->typecnt = 2;
}
} else {
dstlen = 0;
sp->typecnt = 1;
sp->timecnt = 0;
sp->ttis[0].tt_gmtoff = -stdoffset;
sp->ttis[0].tt_isdst = 0;
sp->ttis[0].tt_abbrind = 0;
}
sp->charcnt = stdlen + 1;
if (dstlen != 0)
sp->charcnt += dstlen + 1;
if ((size_t) sp->charcnt > sizeof sp->chars)
return -1;
cp = sp->chars;
(void) strncpy(cp, stdname, stdlen);
cp += stdlen;
*cp++ = '\0';
if (dstlen != 0) {
(void) strncpy(cp, dstname, dstlen);
*(cp + dstlen) = '\0';
}
return 0;
}
static void
gmtload(sp)
struct state * const sp;
{
if (tzload(gmt, sp) != 0)
(void) tzparse(gmt, sp, TRUE);
}
static void
tzsetwall_basic(int rdlocked)
{
if (!rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
if (lcl_is_set < 0) {
if (!rdlocked)
_RWLOCK_UNLOCK(&lcl_rwlock);
return;
}
_RWLOCK_UNLOCK(&lcl_rwlock);
_RWLOCK_WRLOCK(&lcl_rwlock);
lcl_is_set = -1;
#ifdef ALL_STATE
if (lclptr == NULL) {
lclptr = (struct state *) malloc(sizeof *lclptr);
if (lclptr == NULL) {
settzname();
_RWLOCK_UNLOCK(&lcl_rwlock);
if (rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
return;
}
}
#endif
if (tzload((char *) NULL, lclptr) != 0)
gmtload(lclptr);
settzname();
_RWLOCK_UNLOCK(&lcl_rwlock);
if (rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
}
void
tzsetwall(void)
{
tzsetwall_basic(0);
}
static void
tzset_basic(int rdlocked)
{
const char * name;
name = getenv("TZ");
if (name == NULL) {
tzsetwall_basic(rdlocked);
return;
}
if (!rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
if (lcl_is_set > 0 && strcmp(lcl_TZname, name) == 0) {
if (!rdlocked)
_RWLOCK_UNLOCK(&lcl_rwlock);
return;
}
_RWLOCK_UNLOCK(&lcl_rwlock);
_RWLOCK_WRLOCK(&lcl_rwlock);
lcl_is_set = strlen(name) < sizeof lcl_TZname;
if (lcl_is_set)
(void) strcpy(lcl_TZname, name);
#ifdef ALL_STATE
if (lclptr == NULL) {
lclptr = (struct state *) malloc(sizeof *lclptr);
if (lclptr == NULL) {
settzname();
_RWLOCK_UNLOCK(&lcl_rwlock);
if (rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
return;
}
}
#endif
if (*name == '\0') {
lclptr->leapcnt = 0;
lclptr->timecnt = 0;
lclptr->typecnt = 0;
lclptr->ttis[0].tt_isdst = 0;
lclptr->ttis[0].tt_gmtoff = 0;
lclptr->ttis[0].tt_abbrind = 0;
(void) strcpy(lclptr->chars, gmt);
} else if (tzload(name, lclptr) != 0)
if (name[0] == ':' || tzparse(name, lclptr, FALSE) != 0)
(void) gmtload(lclptr);
settzname();
_RWLOCK_UNLOCK(&lcl_rwlock);
if (rdlocked)
_RWLOCK_RDLOCK(&lcl_rwlock);
}
void
tzset(void)
{
tzset_basic(0);
}
static void
localsub(timep, offset, tmp)
const time_t * const timep;
const long offset;
struct tm * const tmp;
{
struct state * sp;
const struct ttinfo * ttisp;
int i;
const time_t t = *timep;
sp = lclptr;
#ifdef ALL_STATE
if (sp == NULL) {
gmtsub(timep, offset, tmp);
return;
}
#endif
if (sp->timecnt == 0 || t < sp->ats[0]) {
i = 0;
while (sp->ttis[i].tt_isdst)
if (++i >= sp->typecnt) {
i = 0;
break;
}
} else {
for (i = 1; i < sp->timecnt; ++i)
if (t < sp->ats[i])
break;
i = sp->types[i - 1];
}
ttisp = &sp->ttis[i];
timesub(&t, ttisp->tt_gmtoff, sp, tmp);
tmp->tm_isdst = ttisp->tt_isdst;
tzname[tmp->tm_isdst] = &sp->chars[ttisp->tt_abbrind];
#ifdef TM_ZONE
tmp->TM_ZONE = &sp->chars[ttisp->tt_abbrind];
#endif
}
struct tm *
localtime(timep)
const time_t * const timep;
{
static pthread_mutex_t localtime_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_key_t localtime_key = -1;
struct tm *p_tm;
if (__isthreaded != 0) {
if (localtime_key < 0) {
_pthread_mutex_lock(&localtime_mutex);
if (localtime_key < 0) {
if (_pthread_key_create(&localtime_key, free) < 0) {
_pthread_mutex_unlock(&localtime_mutex);
return(NULL);
}
}
_pthread_mutex_unlock(&localtime_mutex);
}
p_tm = _pthread_getspecific(localtime_key);
if (p_tm == NULL) {
if ((p_tm = (struct tm *)malloc(sizeof(struct tm)))
== NULL)
return(NULL);
_pthread_setspecific(localtime_key, p_tm);
}
_RWLOCK_RDLOCK(&lcl_rwlock);
tzset_basic(1);
localsub(timep, 0L, p_tm);
_RWLOCK_UNLOCK(&lcl_rwlock);
return(p_tm);
} else {
tzset_basic(0);
localsub(timep, 0L, &tm);
return(&tm);
}
}
struct tm *
localtime_r(timep, tm)
const time_t * const timep;
struct tm * tm;
{
_RWLOCK_RDLOCK(&lcl_rwlock);
tzset_basic(1);
localsub(timep, 0L, tm);
_RWLOCK_UNLOCK(&lcl_rwlock);
return tm;
}
static void
gmtsub(timep, offset, tmp)
const time_t * const timep;
const long offset;
struct tm * const tmp;
{
if (!gmt_is_set) {
_MUTEX_LOCK(&gmt_mutex);
if (!gmt_is_set) {
#ifdef ALL_STATE
gmtptr = (struct state *) malloc(sizeof *gmtptr);
if (gmtptr != NULL)
#endif
gmtload(gmtptr);
gmt_is_set = TRUE;
}
_MUTEX_UNLOCK(&gmt_mutex);
}
timesub(timep, offset, gmtptr, tmp);
#ifdef TM_ZONE
if (offset != 0)
tmp->TM_ZONE = wildabbr;
else {
#ifdef ALL_STATE
if (gmtptr == NULL)
tmp->TM_ZONE = gmt;
else tmp->TM_ZONE = gmtptr->chars;
#endif
#ifndef ALL_STATE
tmp->TM_ZONE = gmtptr->chars;
#endif
}
#endif
}
struct tm *
gmtime(timep)
const time_t * const timep;
{
static pthread_mutex_t gmtime_mutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_key_t gmtime_key = -1;
struct tm *p_tm;
if (__isthreaded != 0) {
if (gmtime_key < 0) {
_pthread_mutex_lock(&gmtime_mutex);
if (gmtime_key < 0) {
if (_pthread_key_create(&gmtime_key, free) < 0) {
_pthread_mutex_unlock(&gmtime_mutex);
return(NULL);
}
}
_pthread_mutex_unlock(&gmtime_mutex);
}
if ((p_tm = _pthread_getspecific(gmtime_key)) == NULL) {
if ((p_tm = (struct tm *)malloc(sizeof(struct tm)))
== NULL) {
return(NULL);
}
_pthread_setspecific(gmtime_key, p_tm);
}
gmtsub(timep, 0L, p_tm);
return(p_tm);
}
else {
gmtsub(timep, 0L, &tm);
return(&tm);
}
}
struct tm *
gmtime_r(timep, tm)
const time_t * const timep;
struct tm * tm;
{
gmtsub(timep, 0L, tm);
return tm;
}
#ifdef STD_INSPIRED
struct tm *
offtime(timep, offset)
const time_t * const timep;
const long offset;
{
gmtsub(timep, offset, &tm);
return &tm;
}
#endif
static void
timesub(timep, offset, sp, tmp)
const time_t * const timep;
const long offset;
const struct state * const sp;
struct tm * const tmp;
{
const struct lsinfo * lp;
long days;
long rem;
long y;
int yleap;
const int * ip;
long corr;
int hit;
int i;
corr = 0;
hit = 0;
#ifdef ALL_STATE
i = (sp == NULL) ? 0 : sp->leapcnt;
#endif
#ifndef ALL_STATE
i = sp->leapcnt;
#endif
while (--i >= 0) {
lp = &sp->lsis[i];
if (*timep >= lp->ls_trans) {
if (*timep == lp->ls_trans) {
hit = ((i == 0 && lp->ls_corr > 0) ||
lp->ls_corr > sp->lsis[i - 1].ls_corr);
if (hit)
while (i > 0 &&
sp->lsis[i].ls_trans ==
sp->lsis[i - 1].ls_trans + 1 &&
sp->lsis[i].ls_corr ==
sp->lsis[i - 1].ls_corr + 1) {
++hit;
--i;
}
}
corr = lp->ls_corr;
break;
}
}
days = *timep / SECSPERDAY;
rem = *timep % SECSPERDAY;
#ifdef mc68k
if (*timep == 0x80000000) {
days = -24855;
rem = -11648;
}
#endif
rem += (offset - corr);
while (rem < 0) {
rem += SECSPERDAY;
--days;
}
while (rem >= SECSPERDAY) {
rem -= SECSPERDAY;
++days;
}
tmp->tm_hour = (int) (rem / SECSPERHOUR);
rem = rem % SECSPERHOUR;
tmp->tm_min = (int) (rem / SECSPERMIN);
tmp->tm_sec = (int) (rem % SECSPERMIN) + hit;
tmp->tm_wday = (int) ((EPOCH_WDAY + days) % DAYSPERWEEK);
if (tmp->tm_wday < 0)
tmp->tm_wday += DAYSPERWEEK;
y = EPOCH_YEAR;
#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
while (days < 0 || days >= (long) year_lengths[yleap = isleap(y)]) {
long newy;
newy = y + days / DAYSPERNYEAR;
if (days < 0)
--newy;
days -= (newy - y) * DAYSPERNYEAR +
LEAPS_THRU_END_OF(newy - 1) -
LEAPS_THRU_END_OF(y - 1);
y = newy;
}
tmp->tm_year = y - TM_YEAR_BASE;
tmp->tm_yday = (int) days;
ip = mon_lengths[yleap];
for (tmp->tm_mon = 0; days >= (long) ip[tmp->tm_mon]; ++(tmp->tm_mon))
days = days - (long) ip[tmp->tm_mon];
tmp->tm_mday = (int) (days + 1);
tmp->tm_isdst = 0;
#ifdef TM_GMTOFF
tmp->TM_GMTOFF = offset;
#endif
}
char *
ctime(timep)
const time_t * const timep;
{
return asctime(localtime(timep));
}
char *
ctime_r(timep, buf)
const time_t * const timep;
char * buf;
{
struct tm tm;
return asctime_r(localtime_r(timep, &tm), buf);
}
#ifndef WRONG
#define WRONG (-1)
#endif
static int
increment_overflow(number, delta)
int * number;
int delta;
{
int number0;
number0 = *number;
*number += delta;
return (*number < number0) != (delta < 0);
}
static int
normalize_overflow(tensptr, unitsptr, base)
int * const tensptr;
int * const unitsptr;
const int base;
{
int tensdelta;
tensdelta = (*unitsptr >= 0) ?
(*unitsptr / base) :
(-1 - (-1 - *unitsptr) / base);
*unitsptr -= tensdelta * base;
return increment_overflow(tensptr, tensdelta);
}
static int
tmcomp(atmp, btmp)
const struct tm * const atmp;
const struct tm * const btmp;
{
int result;
if ((result = (atmp->tm_year - btmp->tm_year)) == 0 &&
(result = (atmp->tm_mon - btmp->tm_mon)) == 0 &&
(result = (atmp->tm_mday - btmp->tm_mday)) == 0 &&
(result = (atmp->tm_hour - btmp->tm_hour)) == 0 &&
(result = (atmp->tm_min - btmp->tm_min)) == 0)
result = atmp->tm_sec - btmp->tm_sec;
return result;
}
static time_t
time2sub(tmp, funcp, offset, okayp, do_norm_secs)
struct tm * const tmp;
void (* const funcp)(const time_t*, long, struct tm*);
const long offset;
int * const okayp;
const int do_norm_secs;
{
const struct state * sp;
int dir;
int bits;
int i, j ;
int saved_seconds;
time_t newt;
time_t t;
struct tm yourtm, mytm;
*okayp = FALSE;
yourtm = *tmp;
if (do_norm_secs) {
if (normalize_overflow(&yourtm.tm_min, &yourtm.tm_sec,
SECSPERMIN))
return WRONG;
}
if (normalize_overflow(&yourtm.tm_hour, &yourtm.tm_min, MINSPERHOUR))
return WRONG;
if (normalize_overflow(&yourtm.tm_mday, &yourtm.tm_hour, HOURSPERDAY))
return WRONG;
if (normalize_overflow(&yourtm.tm_year, &yourtm.tm_mon, MONSPERYEAR))
return WRONG;
if (increment_overflow(&yourtm.tm_year, TM_YEAR_BASE))
return WRONG;
while (yourtm.tm_mday <= 0) {
if (increment_overflow(&yourtm.tm_year, -1))
return WRONG;
i = yourtm.tm_year + (1 < yourtm.tm_mon);
yourtm.tm_mday += year_lengths[isleap(i)];
}
while (yourtm.tm_mday > DAYSPERLYEAR) {
i = yourtm.tm_year + (1 < yourtm.tm_mon);
yourtm.tm_mday -= year_lengths[isleap(i)];
if (increment_overflow(&yourtm.tm_year, 1))
return WRONG;
}
for ( ; ; ) {
i = mon_lengths[isleap(yourtm.tm_year)][yourtm.tm_mon];
if (yourtm.tm_mday <= i)
break;
yourtm.tm_mday -= i;
if (++yourtm.tm_mon >= MONSPERYEAR) {
yourtm.tm_mon = 0;
if (increment_overflow(&yourtm.tm_year, 1))
return WRONG;
}
}
if (increment_overflow(&yourtm.tm_year, -TM_YEAR_BASE))
return WRONG;
if (yourtm.tm_year < 0)
return WRONG;
if (yourtm.tm_sec >= 0 && yourtm.tm_sec < SECSPERMIN)
saved_seconds = 0;
else if (yourtm.tm_year + TM_YEAR_BASE < EPOCH_YEAR) {
if (increment_overflow(&yourtm.tm_sec, 1 - SECSPERMIN))
return WRONG;
saved_seconds = yourtm.tm_sec;
yourtm.tm_sec = SECSPERMIN - 1;
} else {
saved_seconds = yourtm.tm_sec;
yourtm.tm_sec = 0;
}
bits = TYPE_BIT(time_t) - 1;
if (bits > 48)
bits = 48;
t = TYPE_SIGNED(time_t) ? 0 : (((time_t) 1) << bits);
for ( ; ; ) {
(*funcp)(&t, offset, &mytm);
dir = tmcomp(&mytm, &yourtm);
if (dir != 0) {
if (bits-- < 0)
return WRONG;
if (bits < 0)
--t;
else if (dir > 0)
t -= ((time_t) 1) << bits;
else t += ((time_t) 1) << bits;
continue;
}
if (yourtm.tm_isdst < 0 || mytm.tm_isdst == yourtm.tm_isdst)
break;
sp = (funcp == localsub) ? lclptr : gmtptr;
#ifdef ALL_STATE
if (sp == NULL)
return WRONG;
#endif
for (i = sp->typecnt - 1; i >= 0; --i) {
if (sp->ttis[i].tt_isdst != yourtm.tm_isdst)
continue;
for (j = sp->typecnt - 1; j >= 0; --j) {
if (sp->ttis[j].tt_isdst == yourtm.tm_isdst)
continue;
newt = t + sp->ttis[j].tt_gmtoff -
sp->ttis[i].tt_gmtoff;
(*funcp)(&newt, offset, &mytm);
if (tmcomp(&mytm, &yourtm) != 0)
continue;
if (mytm.tm_isdst != yourtm.tm_isdst)
continue;
t = newt;
goto label;
}
}
return WRONG;
}
label:
newt = t + saved_seconds;
if ((newt < t) != (saved_seconds < 0))
return WRONG;
t = newt;
(*funcp)(&t, offset, tmp);
*okayp = TRUE;
return t;
}
static time_t
time2(tmp, funcp, offset, okayp)
struct tm * const tmp;
void (* const funcp)(const time_t*, long, struct tm*);
const long offset;
int * const okayp;
{
time_t t;
t = time2sub(tmp, funcp, offset, okayp, FALSE);
return *okayp ? t : time2sub(tmp, funcp, offset, okayp, TRUE);
}
static time_t
time1(tmp, funcp, offset)
struct tm * const tmp;
void (* const funcp)(const time_t *, long, struct tm *);
const long offset;
{
time_t t;
const struct state * sp;
int samei, otheri;
int sameind, otherind;
int i;
int nseen;
int seen[TZ_MAX_TYPES];
int types[TZ_MAX_TYPES];
int okay;
if (tmp->tm_isdst > 1)
tmp->tm_isdst = 1;
t = time2(tmp, funcp, offset, &okay);
#ifdef PCTS
if (okay)
return t;
if (tmp->tm_isdst < 0)
tmp->tm_isdst = 0;
#endif
#ifndef PCTS
if (okay || tmp->tm_isdst < 0)
return t;
#endif
sp = (funcp == localsub) ? lclptr : gmtptr;
#ifdef ALL_STATE
if (sp == NULL)
return WRONG;
#endif
for (i = 0; i < sp->typecnt; ++i)
seen[i] = FALSE;
nseen = 0;
for (i = sp->timecnt - 1; i >= 0; --i)
if (!seen[sp->types[i]]) {
seen[sp->types[i]] = TRUE;
types[nseen++] = sp->types[i];
}
for (sameind = 0; sameind < nseen; ++sameind) {
samei = types[sameind];
if (sp->ttis[samei].tt_isdst != tmp->tm_isdst)
continue;
for (otherind = 0; otherind < nseen; ++otherind) {
otheri = types[otherind];
if (sp->ttis[otheri].tt_isdst == tmp->tm_isdst)
continue;
tmp->tm_sec += sp->ttis[otheri].tt_gmtoff -
sp->ttis[samei].tt_gmtoff;
tmp->tm_isdst = !tmp->tm_isdst;
t = time2(tmp, funcp, offset, &okay);
if (okay)
return t;
tmp->tm_sec -= sp->ttis[otheri].tt_gmtoff -
sp->ttis[samei].tt_gmtoff;
tmp->tm_isdst = !tmp->tm_isdst;
}
}
return WRONG;
}
time_t
mktime(tmp)
struct tm * const tmp;
{
time_t mktime_return_value;
_RWLOCK_RDLOCK(&lcl_rwlock);
tzset_basic(1);
mktime_return_value = time1(tmp, localsub, 0L);
_RWLOCK_UNLOCK(&lcl_rwlock);
return(mktime_return_value);
}
#ifdef STD_INSPIRED
time_t
timelocal(tmp)
struct tm * const tmp;
{
tmp->tm_isdst = -1;
return mktime(tmp);
}
time_t
timegm(tmp)
struct tm * const tmp;
{
tmp->tm_isdst = 0;
return time1(tmp, gmtsub, 0L);
}
time_t
timeoff(tmp, offset)
struct tm * const tmp;
const long offset;
{
tmp->tm_isdst = 0;
return time1(tmp, gmtsub, offset);
}
#endif
#ifdef CMUCS
long
gtime(tmp)
struct tm * const tmp;
{
const time_t t = mktime(tmp);
if (t == WRONG)
return -1;
return t;
}
#endif
#ifdef STD_INSPIRED
static long
leapcorr(timep)
time_t * timep;
{
struct state * sp;
struct lsinfo * lp;
int i;
sp = lclptr;
i = sp->leapcnt;
while (--i >= 0) {
lp = &sp->lsis[i];
if (*timep >= lp->ls_trans)
return lp->ls_corr;
}
return 0;
}
time_t
time2posix(t)
time_t t;
{
tzset();
return t - leapcorr(&t);
}
time_t
posix2time(t)
time_t t;
{
time_t x;
time_t y;
tzset();
x = t + leapcorr(&t);
y = x - leapcorr(&x);
if (y < t) {
do {
x++;
y = x - leapcorr(&x);
} while (y < t);
if (t != y)
return x - 1;
} else if (y > t) {
do {
--x;
y = x - leapcorr(&x);
} while (y > t);
if (t != y)
return x + 1;
}
return x;
}
#endif