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// Date to string conversion
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// Copyright (C) 2002 Michael Ringgaard. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// 3. Neither the name of the project nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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/////////////////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////////////////////
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GetLocalTime(&systime);
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tmtime.tm_year = systime.wYear-1900;
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tmtime.tm_mon = systime.wMonth-1;
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tmtime.tm_mday = systime.wDay;
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tmtime.tm_wday = systime.wDayOfWeek;
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tmtime.tm_hour = systime.wHour;
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tmtime.tm_min = systime.wMinute;
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tmtime.tm_sec = systime.wSecond;
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/////////////////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////////////////////
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static int month_to_day[12] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
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time_t mktime(struct tm *t)
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year = t->tm_year + month / 12 + 1900;
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result = (year - 1970) * 365 + (year - 1969) / 4 + month_to_day[month];
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result = (year - 1970) * 365 + month_to_day[month];
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result += (year - 1968) / 4;
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result -= (year - 1900) / 100;
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result += (year - 1600) / 400;
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result += t->tm_hour;
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/////////////////////////////////////////////////////////////////////////////////////////////
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// strftime() - taken from OpenBSD //
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/////////////////////////////////////////////////////////////////////////////////////////////
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#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
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#define TYPE_SIGNED(type) (((type) -1) < 0)
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#define INT_STRLEN_MAXIMUM(type) \
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((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
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#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
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#define MONSPERYEAR 12
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#define DAYSPERWEEK 7
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#define TM_YEAR_BASE 1900
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#define HOURSPERDAY 24
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#define DAYSPERNYEAR 365
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#define DAYSPERLYEAR 366
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static char wildabbr[] = "WILDABBR";
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static char * tzname[2] = {
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#define Locale (&C_time_locale)
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const char * mon[MONSPERYEAR];
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const char * month[MONSPERYEAR];
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const char * wday[DAYSPERWEEK];
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const char * weekday[DAYSPERWEEK];
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const char * date_fmt;
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static const struct lc_time_T C_time_locale = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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"Sun", "Mon", "Tue", "Wed",
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"Sunday", "Monday", "Tuesday", "Wednesday",
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"Thursday", "Friday", "Saturday"
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** C99 requires this format.
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** Using just numbers (as here) makes Quakers happier;
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** it's also compatible with SVR4.
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** C99 requires this format.
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** Previously this code used "%D %X", but we now conform to C99.
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** "%a %b %d %H:%M:%S %Y"
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** is used by Solaris 2.3.
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"%a %b %e %H:%M:%S %Z %Y"
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_add(const char * str, char * pt, const char * const ptlim)
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while (pt < ptlim && (*pt = *str++) != '\0')
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_conv(const int n, const char * const format, char * const pt, const char * const ptlim)
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char buf[INT_STRLEN_MAXIMUM(int) + 1];
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(void) _snprintf(buf, sizeof buf, format, n);
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return _add(buf, pt, ptlim);
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_fmt(const char * format, const struct tm * const t, char * pt, const char * const ptlim, int * warnp)
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for ( ; *format; ++format) {
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if (*format == '%') {
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pt = _add((t->tm_wday < 0 ||
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t->tm_wday >= DAYSPERWEEK) ?
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"?" : Locale->weekday[t->tm_wday],
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pt = _add((t->tm_wday < 0 ||
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t->tm_wday >= DAYSPERWEEK) ?
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"?" : Locale->wday[t->tm_wday],
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pt = _add((t->tm_mon < 0 ||
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t->tm_mon >= MONSPERYEAR) ?
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"?" : Locale->month[t->tm_mon],
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pt = _add((t->tm_mon < 0 ||
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t->tm_mon >= MONSPERYEAR) ?
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"?" : Locale->mon[t->tm_mon],
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** %C used to do a...
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** _fmt("%a %b %e %X %Y", t);
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** ...whereas now POSIX 1003.2 calls for
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** something completely different.
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pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
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pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp);
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pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
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pt = _conv(t->tm_mday, "%02d", pt, ptlim);
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** C99 locale modifiers.
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** %Ec %EC %Ex %EX %Ey %EY
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** %Od %oe %OH %OI %Om %OM
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** %OS %Ou %OU %OV %Ow %OW %Oy
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** are supposed to provide alternate
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pt = _conv(t->tm_mday, "%2d", pt, ptlim);
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pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
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pt = _conv(t->tm_hour, "%02d", pt, ptlim);
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pt = _conv((t->tm_hour % 12) ?
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(t->tm_hour % 12) : 12,
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pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
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** This used to be...
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** _conv(t->tm_hour % 12 ?
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** t->tm_hour % 12 : 12, 2, ' ');
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** ...and has been changed to the below to
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** match SunOS 4.1.1 and Arnold Robbins'
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** strftime version 3.0. That is, "%k" and
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** "%l" have been swapped.
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pt = _conv(t->tm_hour, "%2d", pt, ptlim);
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** After all this time, still unclaimed!
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pt = _add("kitchen sink", pt, ptlim);
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#endif /* defined KITCHEN_SINK */
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** This used to be...
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** _conv(t->tm_hour, 2, ' ');
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** ...and has been changed to the below to
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** match SunOS 4.1.1 and Arnold Robbin's
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** strftime version 3.0. That is, "%k" and
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** "%l" have been swapped.
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pt = _conv((t->tm_hour % 12) ?
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(t->tm_hour % 12) : 12,
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pt = _conv(t->tm_min, "%02d", pt, ptlim);
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pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
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pt = _add("\n", pt, ptlim);
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pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
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pt = _fmt("%H:%M", t, pt, ptlim, warnp);
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pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
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pt = _conv(t->tm_sec, "%02d", pt, ptlim);
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char buf[INT_STRLEN_MAXIMUM(
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if (TYPE_SIGNED(time_t))
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(void) _snprintf(buf, sizeof buf,
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else (void) _snprintf(buf, sizeof buf,
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"%lu", (unsigned long) mkt);
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pt = _add(buf, pt, ptlim);
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pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
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pt = _add("\t", pt, ptlim);
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pt = _conv((t->tm_yday + DAYSPERWEEK -
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t->tm_wday) / DAYSPERWEEK,
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** From Arnold Robbins' strftime version 3.0:
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** "ISO 8601: Weekday as a decimal number
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pt = _conv((t->tm_wday == 0) ?
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DAYSPERWEEK : t->tm_wday,
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case 'V': /* ISO 8601 week number */
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case 'G': /* ISO 8601 year (four digits) */
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case 'g': /* ISO 8601 year (two digits) */
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year = t->tm_year + TM_YEAR_BASE;
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** What yday (-3 ... 3) does
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** the ISO year begin on?
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bot = ((yday + 11 - wday) %
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** What yday does the NEXT
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** ISO year begin on?
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w = 1 + ((yday - bot) /
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yday += isleap(year) ?
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pt = _conv(w, "%02d",
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else if (*format == 'g') {
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pt = _conv(year % 100, "%02d",
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} else pt = _conv(year, "%04d",
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pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp);
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pt = _conv((t->tm_yday + DAYSPERWEEK -
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(DAYSPERWEEK - 1))) / DAYSPERWEEK,
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pt = _conv(t->tm_wday, "%d", pt, ptlim);
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pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
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pt = _fmt(Locale->x_fmt, t, pt, ptlim, &warn2);
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pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
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pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
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if (t->tm_isdst >= 0)
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pt = _add(tzname[t->tm_isdst != 0],
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** C99 says that %Z must be replaced by the
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** empty string if the time zone is not
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pt = _add(sign, pt, ptlim);
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pt = _conv((diff/60)*100 + diff%60,
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pt = _fmt(Locale->date_fmt, t, pt, ptlim,
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strftime(char * const s, const size_t maxsize, const char * const format, const struct tm * const t)
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p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);
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if (p == s + maxsize) {
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s[maxsize - 1] = '\0';
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/////////////////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////////////////////
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static struct tm mytm;
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static int DMonth[13] = { 0,31,59,90,120,151,181,212,243,273,304,334,365 };
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static int monthCodes[12] = { 6, 2, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
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calcDayOfWeek(const struct tm* nTM)
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day = (nTM->tm_year%100);
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day += monthCodes[nTM->tm_mon];
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gmtime(const time_t *timer)
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unsigned long x = *timer;
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int imin, ihrs, iday, iyrs;
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int sec, min, hrs, day, mon, yrs;
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int lday, qday, jday, mday;
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imin = x / 60; // whole minutes since 1/1/70
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sec = x - (60 * imin); // leftover seconds
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ihrs = imin / 60; // whole hours since 1/1/70
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min = imin - 60 * ihrs; // leftover minutes
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iday = ihrs / 24; // whole days since 1/1/70
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hrs = ihrs - 24 * iday; // leftover hours
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iday = iday + 365 + 366; // whole days since 1/1/68
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lday = iday / (( 4* 365) + 1); // quadyr = 4 yr period = 1461 days
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qday = iday % (( 4 * 365) + 1); // days since current quadyr began
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if(qday >= (31 + 29)) // if past feb 29 then
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lday = lday + 1; // add this quadyr�s leap day to the
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// # of quadyrs (leap days) since 68
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iyrs = (iday - lday) / 365; // whole years since 1968
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jday = iday - (iyrs * 365) - lday; // days since 1 /1 of current year.
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if(qday <= 365 && qday >= 60) // if past 2/29 and a leap year then
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jday = jday + 1; // add a leap day to the # of whole
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// days since 1/1 of current year
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yrs = iyrs + 1968; // compute year
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mon = 13; // estimate month ( +1)
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mday = 366; // max days since 1/1 is 365
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while(jday < mday) // mday = # of days passed from 1/1
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{ // until first day of current month
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mon = mon - 1; // mon = month (estimated)
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mday = DMonth[mon]; // # elapsed days at first of �mon�
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if((mon > 2) && (yrs % 4) == 0) // if past 2/29 and leap year then
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mday = mday + 1; // add leap day
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// compute month by decrementing
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} // month until found
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day = jday - mday + 1; // compute day of month
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mytm.tm_year = yrs - 1900;
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mytm.tm_wday = calcDayOfWeek(&mytm);
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/////////////////////////////////////////////////////////////////////////////////////////////
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// localtime() - simply using gmtime() //
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/////////////////////////////////////////////////////////////////////////////////////////////
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localtime(const time_t *timer)
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return gmtime(timer);
added
removed
src/3rdparty/ce-compat/ce_time.c
