/* standard strptime() doesn't support %z / %Z properly on all
* platforms, especially those that don't have tm_gmtoff/tm_zone in
* their struct tm. This is a slightly modified NetBSD strptime() with
* some modifications and explicit zone related parameters. */
char *
strptime_with_tz(const char *buf, const char *fmt, struct tm *tm, long *tm_gmtoff, const char **tm_zone)
{
unsigned char c;
const unsigned char *bp, *ep;
int alt_format, i, split_year = 0, neg = 0, state = 0,
day_offset = -1, week_offset = 0, offs;
const char *new_fmt;
bp = (const u_char *)buf;
while (bp != NULL && (c = *fmt++) != '\0') {
/* Clear `alternate' modifier prior to new conversion. */
alt_format = 0;
i = 0;
/* Eat up white-space. */
if (isspace(c)) {
while (isspace(*bp))
bp++;
continue;
}
if (c != '%')
goto literal;
again: switch (c = *fmt++) {
case '%': /* "%%" is converted to "%". */
literal:
if (c != *bp++)
return NULL;
LEGAL_ALT(0);
continue;
/*
* "Alternative" modifiers. Just set the appropriate flag
* and start over again.
*/
case 'E': /* "%E?" alternative conversion modifier. */
LEGAL_ALT(0);
alt_format |= ALT_E;
goto again;
case 'O': /* "%O?" alternative conversion modifier. */
LEGAL_ALT(0);
alt_format |= ALT_O;
goto again;
/*
* "Complex" conversion rules, implemented through recursion.
*/
case 'c': /* Date and time, using the locale's format. */
new_fmt = _TIME_LOCALE(loc)->d_t_fmt;
state |= S_WDAY | S_MON | S_MDAY | S_YEAR;
goto recurse;
case 'D': /* The date as "%m/%d/%y". */
new_fmt = "%m/%d/%y";
LEGAL_ALT(0);
state |= S_MON | S_MDAY | S_YEAR;
goto recurse;
case 'F': /* The date as "%Y-%m-%d". */
new_fmt = "%Y-%m-%d";
LEGAL_ALT(0);
state |= S_MON | S_MDAY | S_YEAR;
goto recurse;
case 'R': /* The time as "%H:%M". */
new_fmt = "%H:%M";
LEGAL_ALT(0);
goto recurse;
case 'r': /* The time in 12-hour clock representation. */
new_fmt = _TIME_LOCALE(loc)->t_fmt_ampm;
LEGAL_ALT(0);
goto recurse;
case 'T': /* The time as "%H:%M:%S". */
new_fmt = "%H:%M:%S";
LEGAL_ALT(0);
goto recurse;
case 'X': /* The time, using the locale's format. */
new_fmt = _TIME_LOCALE(loc)->t_fmt;
goto recurse;
case 'x': /* The date, using the locale's format. */
new_fmt = _TIME_LOCALE(loc)->d_fmt;
state |= S_MON | S_MDAY | S_YEAR;
recurse:
bp = (const u_char *)strptime_with_tz((const char *)bp,
new_fmt, tm, tm_gmtoff, tm_zone);
LEGAL_ALT(ALT_E);
continue;
/*
* "Elementary" conversion rules.
*/
case 'A': /* The day of week, using the locale's form. */
case 'a':
bp = find_string(bp, &tm->tm_wday,
_TIME_LOCALE(loc)->day, _TIME_LOCALE(loc)->abday, 7);
LEGAL_ALT(0);
state |= S_WDAY;
continue;
case 'B': /* The month, using the locale's form. */
case 'b':
case 'h':
bp = find_string(bp, &tm->tm_mon,
_TIME_LOCALE(loc)->mon, _TIME_LOCALE(loc)->abmon,
12);
LEGAL_ALT(0);
state |= S_MON;
continue;
case 'C': /* The century number. */
i = 20;
bp = conv_num(bp, &i, 0, 99);
i = i * 100 - TM_YEAR_BASE;
if (split_year)
i += tm->tm_year % 100;
split_year = 1;
tm->tm_year = i;
LEGAL_ALT(ALT_E);
state |= S_YEAR;
continue;
case 'd': /* The day of month. */
case 'e':
bp = conv_num(bp, &tm->tm_mday, 1, 31);
LEGAL_ALT(ALT_O);
state |= S_MDAY;
continue;
case 'k': /* The hour (24-hour clock representation). */
LEGAL_ALT(0);
/* FALLTHROUGH */
case 'H':
bp = conv_num(bp, &tm->tm_hour, 0, 23);
LEGAL_ALT(ALT_O);
state |= S_HOUR;
continue;
case 'l': /* The hour (12-hour clock representation). */
LEGAL_ALT(0);
/* FALLTHROUGH */
case 'I':
bp = conv_num(bp, &tm->tm_hour, 1, 12);
if (tm->tm_hour == 12)
tm->tm_hour = 0;
LEGAL_ALT(ALT_O);
state |= S_HOUR;
continue;
case 'j': /* The day of year. */
i = 1;
bp = conv_num(bp, &i, 1, 366);
tm->tm_yday = i - 1;
LEGAL_ALT(0);
state |= S_YDAY;
continue;
case 'M': /* The minute. */
bp = conv_num(bp, &tm->tm_min, 0, 59);
LEGAL_ALT(ALT_O);
continue;
case 'm': /* The month. */
i = 1;
bp = conv_num(bp, &i, 1, 12);
tm->tm_mon = i - 1;
LEGAL_ALT(ALT_O);
state |= S_MON;
continue;
case 'p': /* The locale's equivalent of AM/PM. */
bp = find_string(bp, &i, _TIME_LOCALE(loc)->am_pm,
NULL, 2);
if (HAVE_HOUR(state) && tm->tm_hour > 11)
return NULL;
tm->tm_hour += i * 12;
LEGAL_ALT(0);
continue;
case 'S': /* The seconds. */
bp = conv_num(bp, &tm->tm_sec, 0, 61);
LEGAL_ALT(ALT_O);
continue;
#ifndef TIME_MAX
#define TIME_MAX INT64_MAX
#endif
case 's': /* seconds since the epoch */
{
time_t sse = 0;
uint64_t rulim = TIME_MAX;
if (*bp < '0' || *bp > '9') {
bp = NULL;
continue;
}
do {
sse *= 10;
sse += *bp++ - '0';
rulim /= 10;
} while ((sse * 10 <= TIME_MAX) &&
rulim && *bp >= '0' && *bp <= '9');
if (sse < 0 || (uint64_t)sse > TIME_MAX) {
bp = NULL;
continue;
}
cached_localtime(&sse, tm);
state |= S_YDAY | S_WDAY |
S_MON | S_MDAY | S_YEAR;
}
continue;
case 'U': /* The week of year, beginning on sunday. */
case 'W': /* The week of year, beginning on monday. */
/*
* XXX This is bogus, as we can not assume any valid
* information present in the tm structure at this
* point to calculate a real value, so just check the
* range for now.
*/
bp = conv_num(bp, &i, 0, 53);
LEGAL_ALT(ALT_O);
if (c == 'U')
day_offset = TM_SUNDAY;
else
day_offset = TM_MONDAY;
week_offset = i;
continue;
case 'w': /* The day of week, beginning on sunday. */
bp = conv_num(bp, &tm->tm_wday, 0, 6);
LEGAL_ALT(ALT_O);
state |= S_WDAY;
continue;
case 'u': /* The day of week, monday = 1. */
bp = conv_num(bp, &i, 1, 7);
tm->tm_wday = i % 7;
LEGAL_ALT(ALT_O);
state |= S_WDAY;
continue;
case 'g': /* The year corresponding to the ISO week
* number but without the century.
*/
bp = conv_num(bp, &i, 0, 99);
continue;
case 'G': /* The year corresponding to the ISO week
* number with century.
*/
do
bp++;
while (isdigit(*bp));
continue;
case 'V': /* The ISO 8601:1988 week number as decimal */
bp = conv_num(bp, &i, 0, 53);
continue;
case 'Y': /* The year. */
i = TM_YEAR_BASE; /* just for data sanity... */
bp = conv_num(bp, &i, 0, 9999);
tm->tm_year = i - TM_YEAR_BASE;
LEGAL_ALT(ALT_E);
state |= S_YEAR;
continue;
case 'y': /* The year within 100 years of the epoch. */
/* LEGAL_ALT(ALT_E | ALT_O); */
bp = conv_num(bp, &i, 0, 99);
if (split_year)
/* preserve century */
i += (tm->tm_year / 100) * 100;
else {
split_year = 1;
if (i <= 68)
i = i + 2000 - TM_YEAR_BASE;
else
i = i + 1900 - TM_YEAR_BASE;
}
tm->tm_year = i;
state |= S_YEAR;
continue;
case 'Z':
tzset();
if (strncmp((const char *)bp, gmt, 3) == 0 ||
strncmp((const char *)bp, utc, 3) == 0) {
tm->tm_isdst = 0;
*tm_gmtoff = 0;
*tm_zone = gmt;
bp += 3;
} else {
ep = find_string(bp, &i,
(const char * const *)tzname,
NULL, 2);
if (ep != NULL) {
tm->tm_isdst = i;
*tm_gmtoff = -(timezone);
*tm_zone = tzname[i];
}
bp = ep;
}
continue;
case 'z':
/*
* We recognize all ISO 8601 formats:
* Z = Zulu time/UTC
* [+-]hhmm
* [+-]hh:mm
* [+-]hh
* We recognize all RFC-822/RFC-2822 formats:
* UT|GMT
* North American : UTC offsets
* E[DS]T = Eastern : -4 | -5
* C[DS]T = Central : -5 | -6
* M[DS]T = Mountain: -6 | -7
* P[DS]T = Pacific : -7 | -8
* Military
* [A-IL-M] = -1 ... -9 (J not used)
* [N-Y] = +1 ... +12
*/
while (isspace(*bp))
bp++;
switch (*bp++) {
case 'G':
if (*bp++ != 'M')
return NULL;
/*FALLTHROUGH*/
case 'U':
if (*bp++ != 'T')
return NULL;
/*FALLTHROUGH*/
case 'Z':
tm->tm_isdst = 0;
*tm_gmtoff = 0;
*tm_zone = utc;
continue;
case '+':
neg = 0;
break;
case '-':
neg = 1;
break;
default:
--bp;
ep = find_string(bp, &i, nast, NULL, 4);
if (ep != NULL) {
*tm_gmtoff = (-5 - i) * 3600;
*tm_zone = __UNCONST(nast[i]);
bp = ep;
continue;
}
ep = find_string(bp, &i, nadt, NULL, 4);
if (ep != NULL) {
tm->tm_isdst = 1;
*tm_gmtoff = (-4 - i) * 3600;
*tm_zone = __UNCONST(nadt[i]);
bp = ep;
continue;
}
if ((*bp >= 'A' && *bp <= 'I') ||
(*bp >= 'L' && *bp <= 'Y')) {
/* Argh! No 'J'! */
if (*bp >= 'A' && *bp <= 'I')
*tm_gmtoff =
(('A' - 1) - (int)*bp) * 3600;
else if (*bp >= 'L' && *bp <= 'M')
*tm_gmtoff = ('A' - (int)*bp) * 3600;
else if (*bp >= 'N' && *bp <= 'Y')
*tm_gmtoff = ((int)*bp - 'M') * 3600;
*tm_zone = utc; /* XXX */
bp++;
continue;
}
return NULL;
}
offs = 0;
for (i = 0; i < 4; ) {
if (isdigit(*bp)) {
offs = offs * 10 + (*bp++ - '0');
i++;
continue;
}
if (i == 2 && *bp == ':') {
bp++;
continue;
}
break;
}
switch (i) {
case 2:
offs *= 100;
break;
case 4:
i = offs % 100;
if (i >= 60)
return NULL;
/* Convert minutes into decimal */
offs = (offs / 100) * 100 + (i * 50) / 30;
break;
default:
return NULL;
}
if (neg)
offs = -offs;
tm->tm_isdst = 0; /* XXX */
*tm_gmtoff = (offs * 3600) / 100;
*tm_zone = utc; /* XXX */
continue;
/*
* Miscellaneous conversions.
*/
case 'n': /* Any kind of white-space. */
case 't':
while (isspace(*bp))
bp++;
LEGAL_ALT(0);
continue;
default: /* Unknown/unsupported conversion. */
return NULL;
}
}
if (!HAVE_YDAY(state) && HAVE_YEAR(state)) {
if (HAVE_MON(state) && HAVE_MDAY(state)) {
/* calculate day of year (ordinal date) */
tm->tm_yday = start_of_month[isleap_sum(tm->tm_year,
TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1);
state |= S_YDAY;
} else if (day_offset != -1) {
/*
* Set the date to the first Sunday (or Monday)
* of the specified week of the year.
*/
if (!HAVE_WDAY(state)) {
tm->tm_wday = day_offset;
state |= S_WDAY;
}
tm->tm_yday = (7 -
first_wday_of(tm->tm_year + TM_YEAR_BASE) +
day_offset) % 7 + (week_offset - 1) * 7 +
tm->tm_wday - day_offset;
state |= S_YDAY;
}
}
if (HAVE_YDAY(state) && HAVE_YEAR(state)) {
int isleap;
if (!HAVE_MON(state)) {
/* calculate month of day of year */
i = 0;
isleap = isleap_sum(tm->tm_year, TM_YEAR_BASE);
while (tm->tm_yday >= start_of_month[isleap][i])
i++;
if (i > 12) {
i = 1;
tm->tm_yday -= start_of_month[isleap][12];
tm->tm_year++;
}
tm->tm_mon = i - 1;
state |= S_MON;
}
if (!HAVE_MDAY(state)) {
/* calculate day of month */
isleap = isleap_sum(tm->tm_year, TM_YEAR_BASE);
tm->tm_mday = tm->tm_yday -
start_of_month[isleap][tm->tm_mon] + 1;
state |= S_MDAY;
}
if (!HAVE_WDAY(state)) {
/* calculate day of week */
i = 0;
week_offset = first_wday_of(tm->tm_year);
while (i++ <= tm->tm_yday) {
if (week_offset++ >= 6)
week_offset = 0;
}
tm->tm_wday = week_offset;
state |= S_WDAY;
}
}
return __UNCONST(bp);
}
static char *
_strptime(const char *buf, const char *fmt, struct tm *tm, int *GMTp,
locale_t locale)
{
char c;
const char *ptr;
int day_offset = -1, wday_offset;
int week_offset;
int i, len;
int flags;
int Ealternative, Oalternative;
const struct lc_time_T *tptr = __get_current_time_locale(locale);
static int start_of_month[2][13] = {
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}
};
flags = FLAG_NONE;
ptr = fmt;
while (*ptr != 0) {
c = *ptr++;
if (c != '%') {
if (isspace_l((unsigned char)c, locale))
while (*buf != 0 &&
isspace_l((unsigned char)*buf, locale))
buf++;
else if (c != *buf++)
return (NULL);
continue;
}
Ealternative = 0;
Oalternative = 0;
label:
c = *ptr++;
switch (c) {
case '%':
if (*buf++ != '%')
return (NULL);
break;
case '+':
buf = _strptime(buf, tptr->date_fmt, tm, GMTp, locale);
if (buf == NULL)
return (NULL);
flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
break;
case 'C':
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
/* XXX This will break for 3-digit centuries. */
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 19)
return (NULL);
tm->tm_year = i * 100 - TM_YEAR_BASE;
flags |= FLAG_YEAR;
break;
case 'c':
buf = _strptime(buf, tptr->c_fmt, tm, GMTp, locale);
if (buf == NULL)
return (NULL);
flags |= FLAG_WDAY | FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
break;
case 'D':
buf = _strptime(buf, "%m/%d/%y", tm, GMTp, locale);
if (buf == NULL)
return (NULL);
flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
break;
case 'E':
if (Ealternative || Oalternative)
break;
Ealternative++;
goto label;
case 'O':
if (Ealternative || Oalternative)
break;
Oalternative++;
goto label;
case 'F':
buf = _strptime(buf, "%Y-%m-%d", tm, GMTp, locale);
if (buf == NULL)
return (NULL);
flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
break;
case 'R':
buf = _strptime(buf, "%H:%M", tm, GMTp, locale);
if (buf == NULL)
return (NULL);
break;
case 'r':
buf = _strptime(buf, tptr->ampm_fmt, tm, GMTp, locale);
if (buf == NULL)
return (NULL);
break;
case 'T':
buf = _strptime(buf, "%H:%M:%S", tm, GMTp, locale);
if (buf == NULL)
return (NULL);
break;
case 'X':
buf = _strptime(buf, tptr->X_fmt, tm, GMTp, locale);
if (buf == NULL)
return (NULL);
break;
case 'x':
buf = _strptime(buf, tptr->x_fmt, tm, GMTp, locale);
if (buf == NULL)
return (NULL);
flags |= FLAG_MONTH | FLAG_MDAY | FLAG_YEAR;
break;
case 'j':
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 3;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 1 || i > 366)
return (NULL);
tm->tm_yday = i - 1;
flags |= FLAG_YDAY;
break;
case 'M':
case 'S':
if (*buf == 0 ||
isspace_l((unsigned char)*buf, locale))
break;
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (c == 'M') {
if (i > 59)
return (NULL);
tm->tm_min = i;
} else {
if (i > 60)
return (NULL);
tm->tm_sec = i;
}
break;
case 'H':
case 'I':
case 'k':
case 'l':
/*
* Of these, %l is the only specifier explicitly
* documented as not being zero-padded. However,
* there is no harm in allowing zero-padding.
*
* XXX The %l specifier may gobble one too many
* digits if used incorrectly.
*/
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (c == 'H' || c == 'k') {
if (i > 23)
return (NULL);
} else if (i > 12)
return (NULL);
tm->tm_hour = i;
break;
case 'p':
/*
* XXX This is bogus if parsed before hour-related
* specifiers.
*/
len = strlen(tptr->am);
if (strncasecmp_l(buf, tptr->am, len, locale) == 0) {
if (tm->tm_hour > 12)
return (NULL);
if (tm->tm_hour == 12)
tm->tm_hour = 0;
buf += len;
break;
}
len = strlen(tptr->pm);
if (strncasecmp_l(buf, tptr->pm, len, locale) == 0) {
if (tm->tm_hour > 12)
return (NULL);
if (tm->tm_hour != 12)
tm->tm_hour += 12;
buf += len;
break;
}
return (NULL);
case 'A':
case 'a':
for (i = 0; i < asizeof(tptr->weekday); i++) {
len = strlen(tptr->weekday[i]);
if (strncasecmp_l(buf, tptr->weekday[i],
len, locale) == 0)
break;
len = strlen(tptr->wday[i]);
if (strncasecmp_l(buf, tptr->wday[i],
len, locale) == 0)
break;
}
if (i == asizeof(tptr->weekday))
return (NULL);
buf += len;
tm->tm_wday = i;
flags |= FLAG_WDAY;
break;
case 'U':
case 'W':
/*
* XXX This is bogus, as we can not assume any valid
* information present in the tm structure at this
* point to calculate a real value, so just check the
* range for now.
*/
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i > 53)
return (NULL);
if (c == 'U')
day_offset = TM_SUNDAY;
else
day_offset = TM_MONDAY;
week_offset = i;
break;
case 'w':
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
i = *buf - '0';
buf++;
if (i > 6)
return (NULL);
tm->tm_wday = i;
flags |= FLAG_WDAY;
break;
case 'e':
/*
* With %e format, our strftime(3) adds a blank space
* before single digits.
*/
if (*buf != 0 &&
isspace_l((unsigned char)*buf, locale))
buf++;
/* FALLTHROUGH */
case 'd':
/*
* The %e specifier was once explicitly documented as
* not being zero-padded but was later changed to
* equivalent to %d. There is no harm in allowing
* such padding.
*
* XXX The %e specifier may gobble one too many
* digits if used incorrectly.
*/
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i > 31)
return (NULL);
tm->tm_mday = i;
flags |= FLAG_MDAY;
break;
case 'B':
case 'b':
case 'h':
for (i = 0; i < asizeof(tptr->month); i++) {
if (Oalternative) {
if (c == 'B') {
len = strlen(tptr->alt_month[i]);
if (strncasecmp_l(buf,
tptr->alt_month[i],
len, locale) == 0)
break;
}
} else {
len = strlen(tptr->month[i]);
if (strncasecmp_l(buf, tptr->month[i],
len, locale) == 0)
break;
}
}
/*
* Try the abbreviated month name if the full name
* wasn't found and Oalternative was not requested.
*/
if (i == asizeof(tptr->month) && !Oalternative) {
for (i = 0; i < asizeof(tptr->month); i++) {
len = strlen(tptr->mon[i]);
if (strncasecmp_l(buf, tptr->mon[i],
len, locale) == 0)
break;
}
}
if (i == asizeof(tptr->month))
return (NULL);
tm->tm_mon = i;
buf += len;
flags |= FLAG_MONTH;
break;
case 'm':
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 1 || i > 12)
return (NULL);
tm->tm_mon = i - 1;
flags |= FLAG_MONTH;
break;
case 's':
{
char *cp;
int sverrno;
long n;
time_t t;
sverrno = errno;
errno = 0;
n = strtol_l(buf, &cp, 10, locale);
if (errno == ERANGE || (long)(t = n) != n) {
errno = sverrno;
return (NULL);
}
errno = sverrno;
buf = cp;
if (gmtime_r(&t, tm) == NULL)
return (NULL);
*GMTp = 1;
flags |= FLAG_YDAY | FLAG_WDAY | FLAG_MONTH |
FLAG_MDAY | FLAG_YEAR;
}
break;
case 'Y':
case 'y':
if (*buf == 0 ||
isspace_l((unsigned char)*buf, locale))
break;
if (!isdigit_l((unsigned char)*buf, locale))
return (NULL);
len = (c == 'Y') ? 4 : 2;
for (i = 0; len && *buf != 0 &&
isdigit_l((unsigned char)*buf, locale); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (c == 'Y')
i -= TM_YEAR_BASE;
if (c == 'y' && i < 69)
i += 100;
if (i < 0)
return (NULL);
tm->tm_year = i;
flags |= FLAG_YEAR;
break;
case 'Z':
{
const char *cp;
char *zonestr;
for (cp = buf; *cp &&
isupper_l((unsigned char)*cp, locale); ++cp) {
/*empty*/
}
if (cp - buf) {
zonestr = alloca(cp - buf + 1);
strncpy(zonestr, buf, cp - buf);
zonestr[cp - buf] = '\0';
tzset();
if (0 == strcmp(zonestr, "GMT") ||
0 == strcmp(zonestr, "UTC")) {
*GMTp = 1;
} else if (0 == strcmp(zonestr, tzname[0])) {
tm->tm_isdst = 0;
} else if (0 == strcmp(zonestr, tzname[1])) {
tm->tm_isdst = 1;
} else {
return (NULL);
}
buf += cp - buf;
}
}
break;
case 'z':
{
int sign = 1;
len = 4; /* RFC 822/ISO 8601 */
if (*buf != '+') {
if (*buf == '-')
sign = -1;
else if (*buf == 'Z') /* ISO 8601 Z (UTC) */
len = 0;
else
return (NULL);
}
buf++;
i = 0;
for (; len > 0; len--) {
if (isdigit_l((unsigned char)*buf, locale)) {
i *= 10;
i += *buf - '0';
buf++;
} else if (*buf == ':' && len == 2) {
buf++; /* ISO 8601 +hh:mm */
if (isdigit_l((unsigned char)*buf,
locale)) {
i *= 10;
i += *buf - '0';
buf++;
} else {
return (NULL);
}
} else if (len == 2) {
i *= 100; /* ISO 8601 +hh */
break;
} else {
return (NULL);
}
}
tm->tm_hour -= sign * (i / 100);
tm->tm_min -= sign * (i % 100);
*GMTp = 1;
}
break;
case 'n':
case 't':
while (isspace_l((unsigned char)*buf, locale))
buf++;
break;
default:
return (NULL);
}
}
if (!(flags & FLAG_YDAY) && (flags & FLAG_YEAR)) {
if ((flags & (FLAG_MONTH | FLAG_MDAY)) ==
(FLAG_MONTH | FLAG_MDAY)) {
tm->tm_yday = start_of_month[isleap(tm->tm_year +
TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1);
flags |= FLAG_YDAY;
} else if (day_offset != -1) {
/* Set the date to the first Sunday (or Monday)
* of the specified week of the year.
*/
if (!(flags & FLAG_WDAY)) {
tm->tm_wday = day_offset;
flags |= FLAG_WDAY;
}
tm->tm_yday = (7 -
first_wday_of(tm->tm_year + TM_YEAR_BASE) +
day_offset) % 7 + (week_offset - 1 +
(tm->tm_wday == 0 ? day_offset : 0)) * 7 +
tm->tm_wday - day_offset;
flags |= FLAG_YDAY;
}
}
if ((flags & (FLAG_YEAR | FLAG_YDAY)) == (FLAG_YEAR | FLAG_YDAY)) {
if (!(flags & FLAG_MONTH)) {
i = 0;
while (tm->tm_yday >=
start_of_month[isleap(tm->tm_year +
TM_YEAR_BASE)][i])
i++;
if (i > 12) {
i = 1;
tm->tm_yday -=
start_of_month[isleap(tm->tm_year +
TM_YEAR_BASE)][12];
tm->tm_year++;
}
tm->tm_mon = i - 1;
flags |= FLAG_MONTH;
}
if (!(flags & FLAG_MDAY)) {
tm->tm_mday = tm->tm_yday -
start_of_month[isleap(tm->tm_year + TM_YEAR_BASE)]
[tm->tm_mon] + 1;
flags |= FLAG_MDAY;
}
if (!(flags & FLAG_WDAY)) {
i = 0;
wday_offset = first_wday_of(tm->tm_year);
while (i++ <= tm->tm_yday) {
if (wday_offset++ >= 6)
wday_offset = 0;
}
tm->tm_wday = wday_offset;
flags |= FLAG_WDAY;
}
}
return ((char *)buf);
}
