size_t
strftime(char *s, size_t maxsize, const char *format, const struct tm *timeptr)
{
char *endp = s + maxsize;
char *start = s;
auto char tbuf[100];
long off;
int i, w, y;
static short first = 1;
#ifdef POSIX_SEMANTICS
static char *savetz = NULL;
static int savetzlen = 0;
char *tz;
#endif /* POSIX_SEMANTICS */
#ifndef HAVE_TM_ZONE
#ifndef HAVE_TM_NAME
#ifndef HAVE_TZNAME
extern char *timezone();
struct timeval tv;
struct timezone zone;
#endif /* HAVE_TZNAME */
#endif /* HAVE_TM_NAME */
#endif /* HAVE_TM_ZONE */
/* various tables, useful in North America */
static const char *days_a[] = {
"Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", "Sat",
};
static const char *days_l[] = {
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday",
};
static const char *months_a[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
};
static const char *months_l[] = {
"January", "February", "March", "April",
"May", "June", "July", "August", "September",
"October", "November", "December",
};
static const char *ampm[] = { "AM", "PM", };
if (s == NULL || format == NULL || timeptr == NULL || maxsize == 0)
return 0;
/* quick check if we even need to bother */
if (strchr(format, '%') == NULL && strlen(format) + 1 >= maxsize)
return 0;
#ifndef POSIX_SEMANTICS
if (first) {
tzset();
first = 0;
}
#else /* POSIX_SEMANTICS */
#if defined (SHELL)
tz = get_string_value ("TZ");
#else
tz = getenv("TZ");
#endif
if (first) {
if (tz != NULL) {
int tzlen = strlen(tz);
savetz = (char *) malloc(tzlen + 1);
if (savetz != NULL) {
savetzlen = tzlen + 1;
strcpy(savetz, tz);
}
}
tzset();
first = 0;
}
/* if we have a saved TZ, and it is different, recapture and reset */
if (tz && savetz && (tz[0] != savetz[0] || strcmp(tz, savetz) != 0)) {
i = strlen(tz) + 1;
if (i > savetzlen) {
savetz = (char *) realloc(savetz, i);
if (savetz) {
savetzlen = i;
strcpy(savetz, tz);
}
} else
strcpy(savetz, tz);
tzset();
}
#endif /* POSIX_SEMANTICS */
for (; *format && s < endp - 1; format++) {
tbuf[0] = '\0';
if (*format != '%') {
*s++ = *format;
continue;
}
again:
switch (*++format) {
case '\0':
*s++ = '%';
goto out;
case '%':
*s++ = '%';
continue;
case 'a': /* abbreviated weekday name */
if (timeptr->tm_wday < 0 || timeptr->tm_wday > 6)
strcpy(tbuf, "?");
else
strcpy(tbuf, days_a[timeptr->tm_wday]);
break;
case 'A': /* full weekday name */
if (timeptr->tm_wday < 0 || timeptr->tm_wday > 6)
strcpy(tbuf, "?");
else
strcpy(tbuf, days_l[timeptr->tm_wday]);
break;
case 'b': /* abbreviated month name */
short_month:
if (timeptr->tm_mon < 0 || timeptr->tm_mon > 11)
strcpy(tbuf, "?");
else
strcpy(tbuf, months_a[timeptr->tm_mon]);
break;
case 'B': /* full month name */
if (timeptr->tm_mon < 0 || timeptr->tm_mon > 11)
strcpy(tbuf, "?");
else
strcpy(tbuf, months_l[timeptr->tm_mon]);
break;
case 'c': /* appropriate date and time representation */
/*
* This used to be:
*
* strftime(tbuf, sizeof tbuf, "%a %b %e %H:%M:%S %Y", timeptr);
*
* Now, per the ISO 1999 C standard, it this:
*/
strftime(tbuf, sizeof tbuf, "%A %B %d %T %Y", timeptr);
break;
case 'C':
century:
sprintf(tbuf, "%02d", (timeptr->tm_year + 1900) / 100);
break;
case 'd': /* day of the month, 01 - 31 */
i = range(1, timeptr->tm_mday, 31);
sprintf(tbuf, "%02d", i);
break;
case 'D': /* date as %m/%d/%y */
strftime(tbuf, sizeof tbuf, "%m/%d/%y", timeptr);
break;
case 'e': /* day of month, blank padded */
sprintf(tbuf, "%2d", range(1, timeptr->tm_mday, 31));
break;
case 'E':
/* POSIX (now C99) locale extensions, ignored for now */
goto again;
case 'F': /* ISO 8601 date representation */
strftime(tbuf, sizeof tbuf, "%Y-%m-%d", timeptr);
break;
case 'g':
case 'G':
/*
* Year of ISO week.
*
* If it's December but the ISO week number is one,
* that week is in next year.
* If it's January but the ISO week number is 52 or
* 53, that week is in last year.
* Otherwise, it's this year.
*/
w = iso8601wknum(timeptr);
if (timeptr->tm_mon == 11 && w == 1)
y = 1900 + timeptr->tm_year + 1;
else if (timeptr->tm_mon == 0 && w >= 52)
y = 1900 + timeptr->tm_year - 1;
else
y = 1900 + timeptr->tm_year;
if (*format == 'G')
sprintf(tbuf, "%d", y);
else
sprintf(tbuf, "%02d", y % 100);
break;
case 'h': /* abbreviated month name */
goto short_month;
case 'H': /* hour, 24-hour clock, 00 - 23 */
i = range(0, timeptr->tm_hour, 23);
sprintf(tbuf, "%02d", i);
break;
case 'I': /* hour, 12-hour clock, 01 - 12 */
i = range(0, timeptr->tm_hour, 23);
if (i == 0)
i = 12;
else if (i > 12)
i -= 12;
sprintf(tbuf, "%02d", i);
break;
case 'j': /* day of the year, 001 - 366 */
sprintf(tbuf, "%03d", timeptr->tm_yday + 1);
break;
case 'm': /* month, 01 - 12 */
i = range(0, timeptr->tm_mon, 11);
sprintf(tbuf, "%02d", i + 1);
break;
case 'M': /* minute, 00 - 59 */
i = range(0, timeptr->tm_min, 59);
sprintf(tbuf, "%02d", i);
break;
case 'n': /* same as \n */
tbuf[0] = '\n';
tbuf[1] = '\0';
break;
case 'O':
/* POSIX (now C99) locale extensions, ignored for now */
goto again;
case 'p': /* am or pm based on 12-hour clock */
i = range(0, timeptr->tm_hour, 23);
if (i < 12)
strcpy(tbuf, ampm[0]);
else
strcpy(tbuf, ampm[1]);
break;
case 'r': /* time as %I:%M:%S %p */
strftime(tbuf, sizeof tbuf, "%I:%M:%S %p", timeptr);
break;
case 'R': /* time as %H:%M */
strftime(tbuf, sizeof tbuf, "%H:%M", timeptr);
break;
#if defined(HAVE_MKTIME) || defined(GAWK)
case 's': /* time as seconds since the Epoch */
{
struct tm non_const_timeptr;
non_const_timeptr = *timeptr;
sprintf(tbuf, "%ld", mktime(& non_const_timeptr));
break;
}
#endif /* defined(HAVE_MKTIME) || defined(GAWK) */
case 'S': /* second, 00 - 60 */
i = range(0, timeptr->tm_sec, 60);
sprintf(tbuf, "%02d", i);
break;
case 't': /* same as \t */
tbuf[0] = '\t';
tbuf[1] = '\0';
break;
case 'T': /* time as %H:%M:%S */
the_time:
strftime(tbuf, sizeof tbuf, "%H:%M:%S", timeptr);
break;
case 'u':
/* ISO 8601: Weekday as a decimal number [1 (Monday) - 7] */
sprintf(tbuf, "%d", timeptr->tm_wday == 0 ? 7 :
timeptr->tm_wday);
break;
case 'U': /* week of year, Sunday is first day of week */
sprintf(tbuf, "%02d", weeknumber(timeptr, 0));
break;
case 'V': /* week of year according ISO 8601 */
sprintf(tbuf, "%02d", iso8601wknum(timeptr));
break;
case 'w': /* weekday, Sunday == 0, 0 - 6 */
i = range(0, timeptr->tm_wday, 6);
sprintf(tbuf, "%d", i);
break;
case 'W': /* week of year, Monday is first day of week */
sprintf(tbuf, "%02d", weeknumber(timeptr, 1));
break;
case 'x': /* appropriate date representation */
strftime(tbuf, sizeof tbuf, "%A %B %d %Y", timeptr);
break;
case 'X': /* appropriate time representation */
goto the_time;
break;
case 'y': /* year without a century, 00 - 99 */
year:
i = timeptr->tm_year % 100;
sprintf(tbuf, "%02d", i);
break;
case 'Y': /* year with century */
fullyear:
sprintf(tbuf, "%d", 1900 + timeptr->tm_year);
break;
/*
* From: Chip Rosenthal <*****@*****.**>
* Date: Sun, 19 Mar 1995 00:33:29 -0600 (CST)
*
* Warning: the %z [code] is implemented by inspecting the
* timezone name conditional compile settings, and
* inferring a method to get timezone offsets. I've tried
* this code on a couple of machines, but I don't doubt
* there is some system out there that won't like it.
* Maybe the easiest thing to do would be to bracket this
* with an #ifdef that can turn it off. The %z feature
* would be an admittedly obscure one that most folks can
* live without, but it would be a great help to those of
* us that muck around with various message processors.
*/
case 'z': /* time zone offset east of GMT e.g. -0600 */
#ifdef HAVE_TM_NAME
/*
* Systems with tm_name probably have tm_tzadj as
* secs west of GMT. Convert to mins east of GMT.
*/
off = -timeptr->tm_tzadj / 60;
#else /* !HAVE_TM_NAME */
#ifdef HAVE_TM_ZONE
/*
* Systems with tm_zone probably have tm_gmtoff as
* secs east of GMT. Convert to mins east of GMT.
*/
off = timeptr->tm_gmtoff / 60;
#else /* !HAVE_TM_ZONE */
#if HAVE_TZNAME
/*
* Systems with tzname[] probably have timezone as
* secs west of GMT. Convert to mins east of GMT.
*/
# ifdef HPUX
off = -timezone / 60;
# else
off = -(daylight ? timezone : altzone) / 60;
# endif /* !HPUX */
#else /* !HAVE_TZNAME */
gettimeofday(& tv, & zone);
off = -zone.tz_minuteswest;
#endif /* !HAVE_TZNAME */
#endif /* !HAVE_TM_ZONE */
#endif /* !HAVE_TM_NAME */
if (off < 0) {
tbuf[0] = '-';
off = -off;
} else {
tbuf[0] = '+';
}
sprintf(tbuf+1, "%02d%02d", off/60, off%60);
break;
case 'Z': /* time zone name or abbrevation */
#ifdef HAVE_TZNAME
i = (daylight && timeptr->tm_isdst > 0); /* 0 or 1 */
strcpy(tbuf, tzname[i]);
#else
#ifdef HAVE_TM_ZONE
strcpy(tbuf, timeptr->tm_zone);
#else
#ifdef HAVE_TM_NAME
strcpy(tbuf, timeptr->tm_name);
#else
gettimeofday(& tv, & zone);
strcpy(tbuf, timezone(zone.tz_minuteswest,
timeptr->tm_isdst > 0));
#endif /* HAVE_TM_NAME */
#endif /* HAVE_TM_ZONE */
#endif /* HAVE_TZNAME */
break;
#ifdef SUNOS_EXT
case 'k': /* hour, 24-hour clock, blank pad */
sprintf(tbuf, "%2d", range(0, timeptr->tm_hour, 23));
break;
case 'l': /* hour, 12-hour clock, 1 - 12, blank pad */
i = range(0, timeptr->tm_hour, 23);
if (i == 0)
i = 12;
else if (i > 12)
i -= 12;
sprintf(tbuf, "%2d", i);
break;
#endif
#ifdef HPUX_EXT
case 'N': /* Emperor/Era name */
/* this is essentially the same as the century */
goto century; /* %C */
case 'o': /* Emperor/Era year */
goto year; /* %y */
#endif /* HPUX_EXT */
#ifdef VMS_EXT
case 'v': /* date as dd-bbb-YYYY */
sprintf(tbuf, "%2d-%3.3s-%4d",
range(1, timeptr->tm_mday, 31),
months_a[range(0, timeptr->tm_mon, 11)],
timeptr->tm_year + 1900);
for (i = 3; i < 6; i++)
if (islower(tbuf[i]))
tbuf[i] = toupper(tbuf[i]);
break;
#endif
default:
tbuf[0] = '%';
tbuf[1] = *format;
tbuf[2] = '\0';
break;
}
i = strlen(tbuf);
if (i) {
if (s + i < endp - 1) {
strcpy(s, tbuf);
s += i;
} else
return 0;
}
}
out:
if (s < endp && *format == '\0') {
*s = '\0';
return (s - start);
} else
return 0;
}
static int
iso8601wknum(const struct tm *timeptr)
{
/*
* From 1003.2:
* If the week (Monday to Sunday) containing January 1
* has four or more days in the new year, then it is week 1;
* otherwise it is the highest numbered week of the previous
* year (52 or 53), and the next week is week 1.
*
* ADR: This means if Jan 1 was Monday through Thursday,
* it was week 1, otherwise week 52 or 53.
*
* XPG4 erroneously included POSIX.2 rationale text in the
* main body of the standard. Thus it requires week 53.
*/
int weeknum, jan1day, diff;
/* get week number, Monday as first day of the week */
weeknum = weeknumber(timeptr, 1);
/*
* With thanks and tip of the hatlo to [email protected]
*
* What day of the week does January 1 fall on?
* We know that
* (timeptr->tm_yday - jan1.tm_yday) MOD 7 ==
* (timeptr->tm_wday - jan1.tm_wday) MOD 7
* and that
* jan1.tm_yday == 0
* and that
* timeptr->tm_wday MOD 7 == timeptr->tm_wday
* from which it follows that. . .
*/
jan1day = timeptr->tm_wday - (timeptr->tm_yday % 7);
if (jan1day < 0)
jan1day += 7;
/*
* If Jan 1 was a Monday through Thursday, it was in
* week 1. Otherwise it was last year's highest week, which is
* this year's week 0.
*
* What does that mean?
* If Jan 1 was Monday, the week number is exactly right, it can
* never be 0.
* If it was Tuesday through Thursday, the weeknumber is one
* less than it should be, so we add one.
* Otherwise, Friday, Saturday or Sunday, the week number is
* OK, but if it is 0, it needs to be 52 or 53.
*/
switch (jan1day) {
case 1: /* Monday */
break;
case 2: /* Tuesday */
case 3: /* Wednesday */
case 4: /* Thursday */
weeknum++;
break;
case 5: /* Friday */
case 6: /* Saturday */
case 0: /* Sunday */
if (weeknum == 0) {
#ifdef USE_BROKEN_XPG4
/* XPG4 (as of March 1994) says 53 unconditionally */
weeknum = 53;
#else
/* get week number of last week of last year */
struct tm dec31ly; /* 12/31 last year */
dec31ly = *timeptr;
dec31ly.tm_year--;
dec31ly.tm_mon = 11;
dec31ly.tm_mday = 31;
dec31ly.tm_wday = (jan1day == 0) ? 6 : jan1day - 1;
dec31ly.tm_yday = 364 + isleap(dec31ly.tm_year + 1900);
weeknum = iso8601wknum(& dec31ly);
#endif
}
break;
}
if (timeptr->tm_mon == 11) {
/*
* The last week of the year
* can be in week 1 of next year.
* Sigh.
*
* This can only happen if
* M T W
* 29 30 31
* 30 31
* 31
*/
int wday, mday;
wday = timeptr->tm_wday;
mday = timeptr->tm_mday;
if ( (wday == 1 && (mday >= 29 && mday <= 31))
|| (wday == 2 && (mday == 30 || mday == 31))
|| (wday == 3 && mday == 31))
weeknum = 1;
}
return weeknum;
}
size_t WINAPI StrFTime(string &strDest, const wchar_t *Format,const tm *t)
{
if (CurLang==-1 && Lang.IsLanguageLoaded())
PrepareStrFTime();
// меняем язык.
CurLang=0;
size_t Len;
for (Len=1; *Format; Format++)
{
if (*Format!=L'%')
{
Len++;
const wchar_t Text[]={*Format,0};
strDest+=Text;
}
#if 1
else
{
string strBuf;
switch (*++Format)
{
case L'L':
CurLang=!CurLang;
continue;
// Краткое имя дня недели (Sun,Mon,Tue,Wed,Thu,Fri,Sat)
// abbreviated weekday name
case L'a':
strBuf=AWeekday[CurLang][!WeekFirst?((t->tm_wday+6)%7):(!t->tm_wday?6:t->tm_wday-1)];
break;
// Полное имя дня недели
// full weekday name
case L'A':
strBuf=Weekday[CurLang][!WeekFirst?((t->tm_wday+6)%7):(!t->tm_wday?6:t->tm_wday-1)];
break;
// Краткое имя месяца (Jan,Feb,...)
// abbreviated month name
case L'h':
case L'b':
strBuf=AMonth[CurLang][t->tm_mon];
break;
// Полное имя месяца
// full month name
case L'B':
strBuf=Month[CurLang][t->tm_mon];
break;
//Дата и время в формате WDay Mnt Day HH:MM:SS yyyy
//appropriate date and time representation
case L'c':
atime(strBuf,t);
break;
// Столетие как десятичное число (00 - 99). Например, 1992 => 19
case L'C':
strBuf.Format(L"%02d",(t->tm_year+1900)/100);
break;
// day of month, blank padded
case L'e':
// Две цифры дня месяца (01 - 31)
// day of the month, 01 - 31
case L'd':
strBuf.Format(*Format==L'e'?L"%2d":L"%02d",t->tm_mday);
break;
// hour, 24-hour clock, blank pad
case L'k':
// Две цифры часа (00 - 23)
// hour, 24-hour clock, 00 - 23
case L'H':
strBuf.Format(*Format==L'k'?L"%2d":L"%02d",t->tm_hour);
break;
// hour, 12-hour clock, 1 - 12, blank pad
case L'l':
// Две цифры часа (01 - 12)
// hour, 12-hour clock, 01 - 12
case L'I':
{
int I=t->tm_hour%12;
if (!I)
I=12;
strBuf.Format(*Format==L'l'?L"%2d":L"%02d",I);
break;
}
// Три цифры дня в году (001 - 366)
// day of the year, 001 - 366
case L'j':
strBuf.Format(L"%03d",t->tm_yday+1);
break;
// Две цифры месяца, как десятичное число (1 - 12)
// month, 01 - 12
case L'm':
{
// %mh - Hex month digit
// %m0 - ведущий 0
const wchar_t *fmt=Format[1]==L'h'?L"%X":Format[1]==L'0'?L"%02d":L"%d";
if (fmt[1]!=L'd')
Format++;
strBuf.Format(fmt,t->tm_mon+1);
break;
}
// Две цифры минут (00 - 59)
// minute, 00 - 59
case L'M':
strBuf.Format(L"%02d",t->tm_min);
break;
// AM или PM
// am or pm based on 12-hour clock
case L'p':
strBuf=(t->tm_hour/12)?L"PM":L"AM";
break;
// Две цифры секунд (00 - 59)
// second, 00 - 59
case L'S':
strBuf.Format(L"%02d",t->tm_sec);
break;
// День недели где 0 - Воскресенье (Sunday) (0 - 6)
// weekday, Sunday == 0, 0 - 6
case L'w':
strBuf.Format(L"%d",t->tm_wday);
break;
// Две цифры номера недели, где Воскресенье (Sunday)
// является первым днем недели (00 - 53)
// week of year, Sunday is first day of week
case L'U':
// Две цифры номера недели, где Понедельник (Monday)
// является первым днем недели (00 - 53)
// week of year, Monday is first day of week
case L'W':
{
int I=t->tm_wday-(t->tm_yday%7);
//I = (chr == 'W'?(!WeekFirst?((t->tm_wday+6)%7):(t->tm_wday? t->tm_wday-1:6)):(t->tm_wday)) - (t->tm_yday % 7);
if (I<0)
I+=7;
strBuf.Format(L"%02d",(t->tm_yday+I-(*Format==L'W'))/7);
break;
}
// date as dd-bbb-YYYY
case L'v':
// Дата в формате mm.dd.yyyy
// appropriate date representation
case L'D':
case L'x':
st_time(strBuf,t,*Format);
break;
// Время в формате HH:MM:SS
// appropriate time representation
case L'T':
case L'X':
{
int TimeSeparator=GetTimeSeparator();
strBuf.Format(L"%02d%c%02d%c%02d",t->tm_hour,TimeSeparator,t->tm_min,TimeSeparator,t->tm_sec);
break;
}
// Две цифры года без столетия (00 to 99)
// year without a century, 00 - 99
case L'y':
strBuf.Format(L"%02d",t->tm_year%100);
break;
// Год со столетием (19yy-20yy)
// year with century
case L'Y':
strBuf.Format(L"%d",1900+t->tm_year);
break;
// Имя часового пояса или пусто, если часовой пояс не задан
case L'Z':
strBuf.Format(L"%+03d%02d",-(_timezone/3600),-(_timezone/60)%60);
//Ptr = _tzname[ t->tm_isdst ];
break;
// same as \n
case L'n':
strBuf=L"\n";
break;
// same as \t
case L't':
strBuf=L"\t";
break;
case L'%':
strBuf=L"%";
break;
// time as %I:%M:%S %p
case L'r':
StrFTime(strBuf,L"%I:%M:%S %p",t);
break;
// time as %H:%M
case L'R':
StrFTime(strBuf,L"%H:%M",t);
break;
// week of year according ISO 8601
case L'V':
strBuf.Format(L"%02d",iso8601wknum(t));
break;
}
strDest+=strBuf;
Len+=strBuf.GetLength();
}
#endif
}
if (*Format)
return 0;
return Len-1;
}
