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#ifndef lint
#ifndef NOID
static char elsieid[] = "@(#)strftime.c 7.47";
/*
** Based on the UCB version with the ID appearing below.
** This is ANSIish only when "multibyte character == plain character".
*/
#endif /* !defined NOID */
#endif /* !defined lint */
#include "private.h"
/*
** Copyright (c) 1989 The Regents of the University of California.
** All rights reserved.
**
** Redistribution and use in source and binary forms are permitted
** provided that the above copyright notice and this paragraph are
** duplicated in all such forms and that any documentation,
** advertising materials, and other materials related to such
** distribution and use acknowledge that the software was developed
** by the University of California, Berkeley. The name of the
** University may not be used to endorse or promote products derived
** from this software without specific prior written permission.
** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef LIBC_SCCS
#ifndef lint
static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89";
#endif /* !defined lint */
#endif /* !defined LIBC_SCCS */
#include "tzfile.h"
#include "fcntl.h"
#include "locale.h"
struct lc_time_T {
const char * mon[12];
const char * month[12];
const char * wday[7];
const char * weekday[7];
const char * X_fmt;
const char * x_fmt;
const char * c_fmt;
const char * am;
const char * pm;
const char * date_fmt;
};
#ifdef LOCALE_HOME
#include "sys/stat.h"
static struct lc_time_T localebuf;
static struct lc_time_T * _loc P((void));
#define Locale _loc()
#endif /* defined LOCALE_HOME */
#ifndef LOCALE_HOME
#define Locale (&C_time_locale)
#endif /* !defined LOCALE_HOME */
static const struct lc_time_T C_time_locale = {
{
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
}, {
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
}, {
"Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", "Sat"
}, {
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
},
/* X_fmt */
"%H:%M:%S",
/*
** x_fmt
** Since the C language standard calls for
** "date, using locale's date format," anything goes.
** Using just numbers (as here) makes Quakers happier;
** it's also compatible with SVR4.
*/
"%m/%d/%y",
/*
** c_fmt
** Note that
** "%a %b %d %H:%M:%S %Y"
** is used by Solaris 2.3.
*/
"%D %X", /* %m/%d/%y %H:%M:%S */
/* am */
"AM",
/* pm */
"PM",
/* date_fmt */
"%a %b %e %H:%M:%S %Z %Y"
};
static char * _add P((const char *, char *, const char *));
static char * _conv P((int, const char *, char *, const char *));
static char * _fmt P((const char *, const struct tm *, char *, const char *));
size_t strftime P((char *, size_t, const char *, const struct tm *));
extern char * tzname[];
size_t
strftime(s, maxsize, format, t)
char * const s;
const size_t maxsize;
const char * const format;
const struct tm * const t;
{
char * p;
tzset();
#ifdef LOCALE_HOME
localebuf.mon[0] = 0;
#endif /* defined LOCALE_HOME */
p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize);
if (p == s + maxsize)
return 0;
*p = '\0';
return p - s;
}
static char *
_fmt(format, t, pt, ptlim)
const char * format;
const struct tm * const t;
char * pt;
const char * const ptlim;
{
for ( ; *format; ++format) {
if (*format == '%') {
label:
switch (*++format) {
case '\0':
--format;
break;
case 'A':
pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
"?" : Locale->weekday[t->tm_wday],
pt, ptlim);
continue;
case 'a':
pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
"?" : Locale->wday[t->tm_wday],
pt, ptlim);
continue;
case 'B':
pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
"?" : Locale->month[t->tm_mon],
pt, ptlim);
continue;
case 'b':
case 'h':
pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
"?" : Locale->mon[t->tm_mon],
pt, ptlim);
continue;
case 'C':
/*
** %C used to do a...
** _fmt("%a %b %e %X %Y", t);
** ...whereas now POSIX 1003.2 calls for
** something completely different.
** (ado, 5/24/93)
*/
pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
"%02d", pt, ptlim);
continue;
case 'c':
pt = _fmt(Locale->c_fmt, t, pt, ptlim);
continue;
case 'D':
pt = _fmt("%m/%d/%y", t, pt, ptlim);
continue;
case 'd':
pt = _conv(t->tm_mday, "%02d", pt, ptlim);
continue;
case 'E':
case 'O':
/*
** POSIX locale extensions, a la
** Arnold Robbins' strftime version 3.0.
** The sequences
** %Ec %EC %Ex %Ey %EY
** %Od %oe %OH %OI %Om %OM
** %OS %Ou %OU %OV %Ow %OW %Oy
** are supposed to provide alternate
** representations.
** (ado, 5/24/93)
*/
goto label;
case 'e':
pt = _conv(t->tm_mday, "%2d", pt, ptlim);
continue;
case 'H':
pt = _conv(t->tm_hour, "%02d", pt, ptlim);
continue;
case 'I':
pt = _conv((t->tm_hour % 12) ?
(t->tm_hour % 12) : 12,
"%02d", pt, ptlim);
continue;
case 'j':
pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
continue;
case 'k':
/*
** This used to be...
** _conv(t->tm_hour % 12 ?
** t->tm_hour % 12 : 12, 2, ' ');
** ...and has been changed to the below to
** match SunOS 4.1.1 and Arnold Robbins'
** strftime version 3.0. That is, "%k" and
** "%l" have been swapped.
** (ado, 5/24/93)
*/
pt = _conv(t->tm_hour, "%2d", pt, ptlim);
continue;
#ifdef KITCHEN_SINK
case 'K':
/*
** After all this time, still unclaimed!
*/
pt = _add("kitchen sink", pt, ptlim);
continue;
#endif /* defined KITCHEN_SINK */
case 'l':
/*
** This used to be...
** _conv(t->tm_hour, 2, ' ');
** ...and has been changed to the below to
** match SunOS 4.1.1 and Arnold Robbin's
** strftime version 3.0. That is, "%k" and
** "%l" have been swapped.
** (ado, 5/24/93)
*/
pt = _conv((t->tm_hour % 12) ?
(t->tm_hour % 12) : 12,
"%2d", pt, ptlim);
continue;
case 'M':
pt = _conv(t->tm_min, "%02d", pt, ptlim);
continue;
case 'm':
pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
continue;
case 'n':
pt = _add("\n", pt, ptlim);
continue;
case 'p':
pt = _add((t->tm_hour >= 12) ?
Locale->pm :
Locale->am,
pt, ptlim);
continue;
case 'R':
pt = _fmt("%H:%M", t, pt, ptlim);
continue;
case 'r':
pt = _fmt("%I:%M:%S %p", t, pt, ptlim);
continue;
case 'S':
pt = _conv(t->tm_sec, "%02d", 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);
continue;
case 't':
pt = _add("\t", pt, ptlim);
continue;
case 'U':
pt = _conv((t->tm_yday + 7 - t->tm_wday) / 7,
"%02d", pt, ptlim);
continue;
case 'u':
/*
** From Arnold Robbins' strftime version 3.0:
** "ISO 8601: Weekday as a decimal number
** [1 (Monday) - 7]"
** (ado, 5/24/93)
*/
pt = _conv((t->tm_wday == 0) ? 7 : t->tm_wday,
"%d", pt, ptlim);
continue;
case 'V': /* ISO 8601 week number */
case 'G': /* ISO 8601 year (four digits) */
case 'g': /* ISO 8601 year (two digits) */
/*
** From Arnold Robbins' strftime version 3.0: "the week number of the
** year (the first Monday as the first day of week 1) as a decimal number
** (01-53)."
** (ado, 1993-05-24)
**
** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn:
** "Week 01 of a year is per definition the first week which has the
** Thursday in this year, which is equivalent to the week which contains
** the fourth day of January. In other words, the first week of a new year
** is the week which has the majority of its days in the new year. Week 01
** might also contain days from the previous year and the week before week
** 01 of a year is the last week (52 or 53) of the previous year even if
** it contains days from the new year. A week starts with Monday (day 1)
** and ends with Sunday (day 7). For example, the first week of the year
** 1997 lasts from 1996-12-30 to 1997-01-05..."
** (ado, 1996-01-02)
*/
{
int year;
int yday;
int wday;
int w;
year = t->tm_year + TM_YEAR_BASE;
yday = t->tm_yday;
wday = t->tm_wday;
for ( ; ; ) {
int len;
int bot;
int top;
len = isleap(year) ?
DAYSPERLYEAR :
DAYSPERNYEAR;
/*
** What yday (-3 ... 3) does
** the ISO year begin on?
*/
bot = ((yday + 11 - wday) %
DAYSPERWEEK) - 3;
/*
** What yday does the NEXT
** ISO year begin on?
*/
top = bot -
(len % DAYSPERWEEK);
if (top < -3)
top += DAYSPERWEEK;
top += len;
if (yday >= top) {
++year;
w = 1;
break;
}
if (yday >= bot) {
w = 1 + ((yday - bot) /
DAYSPERWEEK);
break;
}
--year;
yday += isleap(year) ?
DAYSPERLYEAR :
DAYSPERNYEAR;
}
#ifdef XPG4_1994_04_09
if (w == 52 && t->tm_mon == TM_JANUARY)
w = 53;
#endif /* defined XPG4_1994_04_09 */
if (*format == 'V')
pt = _conv(w, "%02d",
pt, ptlim);
else if (*format == 'G')
pt = _conv(year, "%02d",
pt, ptlim);
else pt = _conv(year, "%04d",
pt, ptlim);
}
continue;
case 'v':
/*
** From Arnold Robbins' strftime version 3.0:
** "date as dd-bbb-YYYY"
** (ado, 5/24/93)
*/
pt = _fmt("%e-%b-%Y", t, pt, ptlim);
continue;
case 'W':
pt = _conv((t->tm_yday + 7 -
(t->tm_wday ?
(t->tm_wday - 1) : 6)) / 7,
"%02d", pt, ptlim);
continue;
case 'w':
pt = _conv(t->tm_wday, "%d", pt, ptlim);
continue;
case 'X':
pt = _fmt(Locale->X_fmt, t, pt, ptlim);
continue;
case 'x':
pt = _fmt(Locale->x_fmt, t, pt, ptlim);
continue;
case 'y':
pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
"%02d", pt, ptlim);
continue;
case 'Y':
pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
pt, ptlim);
continue;
case 'Z':
#ifdef TM_ZONE
if (t->TM_ZONE != NULL)
pt = _add(t->TM_ZONE, pt, ptlim);
else
#endif /* defined TM_ZONE */
if (t->tm_isdst == 0 || t->tm_isdst == 1) {
pt = _add(tzname[t->tm_isdst],
pt, ptlim);
} else pt = _add("?", pt, ptlim);
continue;
case '+':
pt = _fmt(Locale->date_fmt, t, pt, ptlim);
continue;
case '%':
/*
* X311J/88-090 (4.12.3.5): if conversion char is
* undefined, behavior is undefined. Print out the
* character itself as printf(3) also does.
*/
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;
}
#ifdef LOCALE_HOME
static struct lc_time_T *
_loc P((void))
{
static const char locale_home[] = LOCALE_HOME;
static const char lc_time[] = "LC_TIME";
static char * locale_buf;
static char locale_buf_C[] = "C";
int fd;
int oldsun; /* "...ain't got nothin' to do..." */
char * lbuf;
char * name;
char * p;
const char ** ap;
const char * plim;
char filename[FILENAME_MAX];
struct stat st;
size_t namesize;
size_t bufsize;
/*
** Use localebuf.mon[0] to signal whether locale is already set up.
*/
if (localebuf.mon[0])
return &localebuf;
name = setlocale(LC_TIME, (char *) NULL);
if (name == NULL || *name == '\0')
goto no_locale;
/*
** If the locale name is the same as our cache, use the cache.
*/
lbuf = locale_buf;
if (lbuf != NULL && strcmp(name, lbuf) == 0) {
p = lbuf;
for (ap = (const char **) &localebuf;
ap < (const char **) (&localebuf + 1);
++ap)
*ap = p += strlen(p) + 1;
return &localebuf;
}
/*
** Slurp the locale file into the cache.
*/
namesize = strlen(name) + 1;
if (sizeof(filename) <
sizeof(locale_home) + namesize + sizeof(lc_time))
goto no_locale;
oldsun = 0;
(void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time);
fd = open(filename, O_RDONLY);
if (fd < 0) {
/*
** Old Sun systems have a different naming and data convention.
*/
oldsun = 1;
(void) sprintf(filename, "%s/%s/%s", locale_home,
lc_time, name);
fd = open(filename, O_RDONLY);
if (fd < 0)
goto no_locale;
}
if (fstat(fd, &st) != 0)
goto bad_locale;
if (st.st_size <= 0)
goto bad_locale;
bufsize = namesize + st.st_size;
locale_buf = NULL;
lbuf = (lbuf == NULL || lbuf == locale_buf_C) ?
malloc(bufsize) : realloc(lbuf, bufsize);
if (lbuf == NULL)
goto bad_locale;
(void) strcpy(lbuf, name);
p = lbuf + namesize;
plim = p + st.st_size;
if (read(fd, p, (size_t) st.st_size) != st.st_size)
goto bad_lbuf;
if (close(fd) != 0)
goto bad_lbuf;
/*
** Parse the locale file into localebuf.
*/
if (plim[-1] != '\n')
goto bad_lbuf;
for (ap = (const char **) &localebuf;
ap < (const char **) (&localebuf + 1);
++ap) {
if (p == plim)
goto bad_lbuf;
*ap = p;
while (*p != '\n')
++p;
*p++ = '\0';
}
if (oldsun) {
/*
** SunOS 4 used an obsolescent format; see localdtconv(3).
** c_fmt had the ``short format for dates and times together''
** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale);
** date_fmt had the ``long format for dates''
** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale).
** Discard the latter in favor of the former.
*/
localebuf.date_fmt = localebuf.c_fmt;
}
/*
** Record the successful parse in the cache.
*/
locale_buf = lbuf;
return &localebuf;
bad_lbuf:
free(lbuf);
bad_locale:
(void) close(fd);
no_locale:
localebuf = C_time_locale;
locale_buf = locale_buf_C;
return &localebuf;
}
#endif /* defined LOCALE_HOME */
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