#ifndef lint
#ifndef NOID
static const char elsieid[] = "@(#)strftime.3 8.3";
#endif
#endif
#include "namespace.h"
#include "private.h"
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdtime/strftime.c,v 1.44 2009/06/09 09:02:58 delphij Exp $");
#include "tzfile.h"
#include <fcntl.h>
#include <sys/stat.h>
#include "un-namespace.h"
#include "timelocal.h"
static char * _add(const char *, char *, const char *);
static char * _conv(int, const char *, char *, const char *);
static char * _fmt(const char *, const struct tm *, char *, const char *,
int *);
static char * _yconv(int, int, int, int, char *, const char *);
extern char * tzname[];
#ifndef YEAR_2000_NAME
#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
#endif
#define IN_NONE 0
#define IN_SOME 1
#define IN_THIS 2
#define IN_ALL 3
#define PAD_DEFAULT 0
#define PAD_LESS 1
#define PAD_SPACE 2
#define PAD_ZERO 3
static const char* fmt_padding[][4] = {
#define PAD_FMT_MONTHDAY 0
#define PAD_FMT_HMS 0
#define PAD_FMT_CENTURY 0
#define PAD_FMT_SHORTYEAR 0
#define PAD_FMT_MONTH 0
#define PAD_FMT_WEEKOFYEAR 0
#define PAD_FMT_DAYOFMONTH 0
{ "%02d", "%d", "%2d", "%02d" },
#define PAD_FMT_SDAYOFMONTH 1
#define PAD_FMT_SHMS 1
{ "%2d", "%d", "%2d", "%02d" },
#define PAD_FMT_DAYOFYEAR 2
{ "%03d", "%d", "%3d", "%03d" },
#define PAD_FMT_YEAR 3
{ "%04d", "%d", "%4d", "%04d" }
};
size_t
strftime(char * __restrict s, size_t maxsize, const char * __restrict format,
const struct tm * __restrict t)
{
char * p;
int warn;
tzset();
warn = IN_NONE;
p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);
#ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) {
(void) fprintf(stderr, "\n");
if (format == NULL)
(void) fprintf(stderr, "NULL strftime format ");
else (void) fprintf(stderr, "strftime format \"%s\" ",
format);
(void) fprintf(stderr, "yields only two digits of years in ");
if (warn == IN_SOME)
(void) fprintf(stderr, "some locales");
else if (warn == IN_THIS)
(void) fprintf(stderr, "the current locale");
else (void) fprintf(stderr, "all locales");
(void) fprintf(stderr, "\n");
}
#endif
if (p == s + maxsize)
return 0;
*p = '\0';
return p - s;
}
static char *
_fmt(format, t, pt, ptlim, warnp)
const char * format;
const struct tm * const t;
char * pt;
const char * const ptlim;
int * warnp;
{
int Ealternative, Oalternative, PadIndex;
struct lc_time_T *tptr = __get_current_time_locale();
for ( ; *format; ++format) {
if (*format == '%') {
Ealternative = 0;
Oalternative = 0;
PadIndex = PAD_DEFAULT;
label:
switch (*++format) {
case '\0':
--format;
break;
case 'A':
pt = _add((t->tm_wday < 0 ||
t->tm_wday >= DAYSPERWEEK) ?
"?" : tptr->weekday[t->tm_wday],
pt, ptlim);
continue;
case 'a':
pt = _add((t->tm_wday < 0 ||
t->tm_wday >= DAYSPERWEEK) ?
"?" : tptr->wday[t->tm_wday],
pt, ptlim);
continue;
case 'B':
pt = _add((t->tm_mon < 0 ||
t->tm_mon >= MONSPERYEAR) ?
"?" : (Oalternative ? tptr->alt_month :
tptr->month)[t->tm_mon],
pt, ptlim);
continue;
case 'b':
case 'h':
pt = _add((t->tm_mon < 0 ||
t->tm_mon >= MONSPERYEAR) ?
"?" : tptr->mon[t->tm_mon],
pt, ptlim);
continue;
case 'C':
pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0,
pt, ptlim);
continue;
case 'c':
{
int warn2 = IN_SOME;
pt = _fmt(tptr->c_fmt, t, pt, ptlim, &warn2);
if (warn2 == IN_ALL)
warn2 = IN_THIS;
if (warn2 > *warnp)
*warnp = warn2;
}
continue;
case 'D':
pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
continue;
case 'd':
pt = _conv(t->tm_mday, fmt_padding[PAD_FMT_DAYOFMONTH][PadIndex],
pt, ptlim);
continue;
case 'E':
if (Ealternative || Oalternative)
break;
Ealternative++;
goto label;
case 'O':
if (Ealternative || Oalternative)
break;
Oalternative++;
goto label;
case 'e':
pt = _conv(t->tm_mday,
fmt_padding[PAD_FMT_SDAYOFMONTH][PadIndex], pt, ptlim);
continue;
case 'F':
pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
continue;
case 'H':
pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_HMS][PadIndex],
pt, ptlim);
continue;
case 'I':
pt = _conv((t->tm_hour % 12) ?
(t->tm_hour % 12) : 12,
fmt_padding[PAD_FMT_HMS][PadIndex], pt, ptlim);
continue;
case 'j':
pt = _conv(t->tm_yday + 1,
fmt_padding[PAD_FMT_DAYOFYEAR][PadIndex], pt, ptlim);
continue;
case 'k':
pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_SHMS][PadIndex],
pt, ptlim);
continue;
#ifdef KITCHEN_SINK
case 'K':
pt = _add("kitchen sink", pt, ptlim);
continue;
#endif
case 'l':
pt = _conv((t->tm_hour % 12) ?
(t->tm_hour % 12) : 12,
fmt_padding[PAD_FMT_SHMS][PadIndex], pt, ptlim);
continue;
case 'M':
pt = _conv(t->tm_min, fmt_padding[PAD_FMT_HMS][PadIndex],
pt, ptlim);
continue;
case 'm':
pt = _conv(t->tm_mon + 1,
fmt_padding[PAD_FMT_MONTH][PadIndex], pt, ptlim);
continue;
case 'n':
pt = _add("\n", pt, ptlim);
continue;
case 'p':
pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
tptr->pm :
tptr->am,
pt, ptlim);
continue;
case 'R':
pt = _fmt("%H:%M", t, pt, ptlim, warnp);
continue;
case 'r':
pt = _fmt(tptr->ampm_fmt, t, pt, ptlim,
warnp);
continue;
case 'S':
pt = _conv(t->tm_sec, fmt_padding[PAD_FMT_HMS][PadIndex],
pt, ptlim);
continue;
case 's':
{
struct tm tm;
char buf[INT_STRLEN_MAXIMUM(
time_t) + 1];
time_t mkt;
tm = *t;
mkt = mktime(&tm);
if (TYPE_SIGNED(time_t))
(void) sprintf(buf, "%ld",
(long) mkt);
else (void) sprintf(buf, "%lu",
(unsigned long) mkt);
pt = _add(buf, pt, ptlim);
}
continue;
case 'T':
pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
continue;
case 't':
pt = _add("\t", pt, ptlim);
continue;
case 'U':
pt = _conv((t->tm_yday + DAYSPERWEEK -
t->tm_wday) / DAYSPERWEEK,
fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim);
continue;
case 'u':
pt = _conv((t->tm_wday == 0) ?
DAYSPERWEEK : t->tm_wday,
"%d", pt, ptlim);
continue;
case 'V':
case 'G':
case 'g':
{
int year;
int base;
int yday;
int wday;
int w;
year = t->tm_year;
base = TM_YEAR_BASE;
yday = t->tm_yday;
wday = t->tm_wday;
for ( ; ; ) {
int len;
int bot;
int top;
len = isleap_sum(year, base) ?
DAYSPERLYEAR :
DAYSPERNYEAR;
bot = ((yday + 11 - wday) %
DAYSPERWEEK) - 3;
top = bot -
(len % DAYSPERWEEK);
if (top < -3)
top += DAYSPERWEEK;
top += len;
if (yday >= top) {
++base;
w = 1;
break;
}
if (yday >= bot) {
w = 1 + ((yday - bot) /
DAYSPERWEEK);
break;
}
--base;
yday += isleap_sum(year, base) ?
DAYSPERLYEAR :
DAYSPERNYEAR;
}
#ifdef XPG4_1994_04_09
if ((w == 52 &&
t->tm_mon == TM_JANUARY) ||
(w == 1 &&
t->tm_mon == TM_DECEMBER))
w = 53;
#endif
if (*format == 'V')
pt = _conv(w, fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex],
pt, ptlim);
else if (*format == 'g') {
*warnp = IN_ALL;
pt = _yconv(year, base, 0, 1,
pt, ptlim);
} else pt = _yconv(year, base, 1, 1,
pt, ptlim);
}
continue;
case 'v':
pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
continue;
case 'W':
pt = _conv((t->tm_yday + DAYSPERWEEK -
(t->tm_wday ?
(t->tm_wday - 1) :
(DAYSPERWEEK - 1))) / DAYSPERWEEK,
fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim);
continue;
case 'w':
pt = _conv(t->tm_wday, "%d", pt, ptlim);
continue;
case 'X':
pt = _fmt(tptr->X_fmt, t, pt, ptlim, warnp);
continue;
case 'x':
{
int warn2 = IN_SOME;
pt = _fmt(tptr->x_fmt, t, pt, ptlim, &warn2);
if (warn2 == IN_ALL)
warn2 = IN_THIS;
if (warn2 > *warnp)
*warnp = warn2;
}
continue;
case 'y':
*warnp = IN_ALL;
pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1,
pt, ptlim);
continue;
case 'Y':
pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1,
pt, ptlim);
continue;
case 'Z':
#ifdef TM_ZONE
if (t->TM_ZONE != NULL)
pt = _add(t->TM_ZONE, pt, ptlim);
else
#endif
if (t->tm_isdst >= 0)
pt = _add(tzname[t->tm_isdst != 0],
pt, ptlim);
continue;
case 'z':
{
int diff;
char const * sign;
if (t->tm_isdst < 0)
continue;
#ifdef TM_GMTOFF
diff = t->TM_GMTOFF;
#else
if (t->tm_isdst == 0)
#ifdef USG_COMPAT
diff = -timezone;
#else
continue;
#endif
else
#ifdef ALTZONE
diff = -altzone;
#else
continue;
#endif
#endif
if (diff < 0) {
sign = "-";
diff = -diff;
} else sign = "+";
pt = _add(sign, pt, ptlim);
diff /= SECSPERMIN;
diff = (diff / MINSPERHOUR) * 100 +
(diff % MINSPERHOUR);
pt = _conv(diff,
fmt_padding[PAD_FMT_YEAR][PadIndex], pt, ptlim);
}
continue;
case '+':
pt = _fmt(tptr->date_fmt, t, pt, ptlim,
warnp);
continue;
case '-':
if (PadIndex != PAD_DEFAULT)
break;
PadIndex = PAD_LESS;
goto label;
case '_':
if (PadIndex != PAD_DEFAULT)
break;
PadIndex = PAD_SPACE;
goto label;
case '0':
if (PadIndex != PAD_DEFAULT)
break;
PadIndex = PAD_ZERO;
goto label;
case '%':
default:
break;
}
}
if (pt == ptlim)
break;
*pt++ = *format;
}
return pt;
}
static char *
_conv(n, format, pt, ptlim)
const int n;
const char * const format;
char * const pt;
const char * const ptlim;
{
char buf[INT_STRLEN_MAXIMUM(int) + 1];
(void) sprintf(buf, format, n);
return _add(buf, pt, ptlim);
}
static char *
_add(str, pt, ptlim)
const char * str;
char * pt;
const char * const ptlim;
{
while (pt < ptlim && (*pt = *str++) != '\0')
++pt;
return pt;
}
static char *
_yconv(a, b, convert_top, convert_yy, pt, ptlim)
const int a;
const int b;
const int convert_top;
const int convert_yy;
char * pt;
const char * const ptlim;
{
register int lead;
register int trail;
#define DIVISOR 100
trail = a % DIVISOR + b % DIVISOR;
lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR;
trail %= DIVISOR;
if (trail < 0 && lead > 0) {
trail += DIVISOR;
--lead;
} else if (lead < 0 && trail > 0) {
trail -= DIVISOR;
++lead;
}
if (convert_top) {
if (lead == 0 && trail < 0)
pt = _add("-0", pt, ptlim);
else pt = _conv(lead, "%02d", pt, ptlim);
}
if (convert_yy)
pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim);
return pt;
}