--- /dev/null
+/* $OpenBSD: wcsftime.c,v 1.2 2013/01/20 20:29:02 millert Exp $ */
+#include "private.h"
+
+/*
+** Based on the UCB version with the ID appearing below.
+** This is ANSIish only when "multibyte character == plain character".
+**
+** Copyright (c) 1989, 1993
+** The Regents of the University of California. All rights reserved.
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions
+** are met:
+** 1. Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** 2. Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in the
+** documentation and/or other materials provided with the distribution.
+** 3. Neither the name of the University nor the names of its contributors
+** may be used to endorse or promote products derived from this software
+** without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+** ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+** SUCH DAMAGE.
+*/
+
+#include "tzfile.h"
+#include "fcntl.h"
+#include <locale.h>
+#include <wchar.h>
+
+struct lc_time_T {
+ const wchar_t * mon[MONSPERYEAR];
+ const wchar_t * month[MONSPERYEAR];
+ const wchar_t * wday[DAYSPERWEEK];
+ const wchar_t * weekday[DAYSPERWEEK];
+ const wchar_t * X_fmt;
+ const wchar_t * x_fmt;
+ const wchar_t * c_fmt;
+ const wchar_t * am;
+ const wchar_t * pm;
+ const wchar_t * date_fmt;
+};
+
+#define Locale (&C_time_locale)
+
+static const struct lc_time_T C_time_locale = {
+ {
+ L"Jan", L"Feb", L"Mar", L"Apr", L"May", L"Jun",
+ L"Jul", L"Aug", L"Sep", L"Oct", L"Nov", L"Dec"
+ }, {
+ L"January", L"February", L"March", L"April", L"May", L"June",
+ L"July", L"August", L"September", L"October", L"November",
+ L"December"
+ }, {
+ L"Sun", L"Mon", L"Tue", L"Wed",
+ L"Thu", L"Fri", L"Sat"
+ }, {
+ L"Sunday", L"Monday", L"Tuesday", L"Wednesday",
+ L"Thursday", L"Friday", L"Saturday"
+ },
+
+ /* X_fmt */
+ L"%H:%M:%S",
+
+ /*
+ ** x_fmt
+ ** C99 requires this format.
+ ** Using just numbers (as here) makes Quakers happier;
+ ** it's also compatible with SVR4.
+ */
+ L"%m/%d/%y",
+
+ /*
+ ** c_fmt
+ ** C99 requires this format.
+ ** Previously this code used "%D %X", but we now conform to C99.
+ ** Note that
+ ** "%a %b %d %H:%M:%S %Y"
+ ** is used by Solaris 2.3.
+ */
+ L"%a %b %e %T %Y",
+
+ /* am */
+ L"AM",
+
+ /* pm */
+ L"PM",
+
+ /* date_fmt */
+ L"%a %b %e %H:%M:%S %Z %Y"
+};
+
+#define UNKNOWN L"?"
+static wchar_t * _add(const wchar_t *, wchar_t *, const wchar_t *);
+static wchar_t * _sadd(const char *, wchar_t *, const wchar_t *);
+static wchar_t * _conv(int, const wchar_t *, wchar_t *, const wchar_t *);
+static wchar_t * _fmt(const wchar_t *, const struct tm *, wchar_t *, const wchar_t *,
+ int *);
+static wchar_t * _yconv(int, int, int, int, wchar_t *, const wchar_t *);
+
+extern char * tzname[];
+
+#ifndef YEAR_2000_NAME
+#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
+#endif /* !defined YEAR_2000_NAME */
+
+#define IN_NONE 0
+#define IN_SOME 1
+#define IN_THIS 2
+#define IN_ALL 3
+
+size_t
+wcsftime(wchar_t *__restrict s, size_t maxsize,
+ const wchar_t *__restrict format, const struct tm *__restrict t)
+{
+ wchar_t *p;
+ int warn;
+
+ tzset();
+ warn = IN_NONE;
+ p = _fmt(((format == NULL) ? L"%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) fwprintf(stderr, "strftime format \"%ls\" ",
+ 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 /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */
+ if (p == s + maxsize) {
+ if (maxsize > 0)
+ s[maxsize - 1] = '\0';
+ return 0;
+ }
+ *p = L'\0';
+ return p - s;
+}
+
+static wchar_t *
+_fmt(const wchar_t *format, const struct tm *t, wchar_t *pt,
+ const wchar_t *ptlim, int *warnp)
+{
+ for ( ; *format; ++format) {
+ if (*format != L'%') {
+ if (pt == ptlim)
+ break;
+ *pt++ = *format;
+ continue;
+ }
+label:
+ switch (*++format) {
+ case '\0':
+ --format;
+ break;
+ case 'A':
+ pt = _add((t->tm_wday < 0 ||
+ t->tm_wday >= DAYSPERWEEK) ?
+ UNKNOWN : Locale->weekday[t->tm_wday],
+ pt, ptlim);
+ continue;
+ case 'a':
+ pt = _add((t->tm_wday < 0 ||
+ t->tm_wday >= DAYSPERWEEK) ?
+ UNKNOWN : Locale->wday[t->tm_wday],
+ pt, ptlim);
+ continue;
+ case 'B':
+ pt = _add((t->tm_mon < 0 ||
+ t->tm_mon >= MONSPERYEAR) ?
+ UNKNOWN : Locale->month[t->tm_mon],
+ pt, ptlim);
+ continue;
+ case 'b':
+ case 'h':
+ pt = _add((t->tm_mon < 0 ||
+ t->tm_mon >= MONSPERYEAR) ?
+ UNKNOWN : 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, 1993-05-24)
+ */
+ pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0,
+ pt, ptlim);
+ continue;
+ case 'c':
+ {
+ int warn2 = IN_SOME;
+
+ pt = _fmt(Locale->c_fmt, t, pt, ptlim, &warn2);
+ if (warn2 == IN_ALL)
+ warn2 = IN_THIS;
+ if (warn2 > *warnp)
+ *warnp = warn2;
+ }
+ continue;
+ case 'D':
+ pt = _fmt(L"%m/%d/%y", t, pt, ptlim, warnp);
+ continue;
+ case 'd':
+ pt = _conv(t->tm_mday, L"%02d", pt, ptlim);
+ continue;
+ case 'E':
+ case 'O':
+ /*
+ ** C99 locale modifiers.
+ ** The sequences
+ ** %Ec %EC %Ex %EX %Ey %EY
+ ** %Od %oe %OH %OI %Om %OM
+ ** %OS %Ou %OU %OV %Ow %OW %Oy
+ ** are supposed to provide alternate
+ ** representations.
+ */
+ goto label;
+ case 'e':
+ pt = _conv(t->tm_mday, L"%2d", pt, ptlim);
+ continue;
+ case 'F':
+ pt = _fmt(L"%Y-%m-%d", t, pt, ptlim, warnp);
+ continue;
+ case 'H':
+ pt = _conv(t->tm_hour, L"%02d", pt, ptlim);
+ continue;
+ case 'I':
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ L"%02d", pt, ptlim);
+ continue;
+ case 'j':
+ pt = _conv(t->tm_yday + 1, L"%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, 1993-05-24)
+ */
+ pt = _conv(t->tm_hour, L"%2d", pt, ptlim);
+ continue;
+ 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, 1993-05-24)
+ */
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ L"%2d", pt, ptlim);
+ continue;
+ case 'M':
+ pt = _conv(t->tm_min, L"%02d", pt, ptlim);
+ continue;
+ case 'm':
+ pt = _conv(t->tm_mon + 1, L"%02d", pt, ptlim);
+ continue;
+ case 'n':
+ pt = _add(L"\n", pt, ptlim);
+ continue;
+ case 'p':
+ pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
+ Locale->pm :
+ Locale->am,
+ pt, ptlim);
+ continue;
+ case 'R':
+ pt = _fmt(L"%H:%M", t, pt, ptlim, warnp);
+ continue;
+ case 'r':
+ pt = _fmt(L"%I:%M:%S %p", t, pt, ptlim, warnp);
+ continue;
+ case 'S':
+ pt = _conv(t->tm_sec, L"%02d", pt, ptlim);
+ continue;
+ case 's':
+ {
+ struct tm tm;
+ wchar_t buf[INT_STRLEN_MAXIMUM(
+ time_t) + 1];
+ time_t mkt;
+
+ tm = *t;
+ mkt = mktime(&tm);
+ if (TYPE_SIGNED(time_t))
+ (void) swprintf(buf,
+ sizeof buf/sizeof buf[0],
+ L"%ld", (long) mkt);
+ else
+ (void) swprintf(buf,
+ sizeof buf/sizeof buf[0],
+ L"%lu", (unsigned long) mkt);
+ pt = _add(buf, pt, ptlim);
+ }
+ continue;
+ case 'T':
+ pt = _fmt(L"%H:%M:%S", t, pt, ptlim, warnp);
+ continue;
+ case 't':
+ pt = _add(L"\t", pt, ptlim);
+ continue;
+ case 'U':
+ pt = _conv((t->tm_yday + DAYSPERWEEK -
+ t->tm_wday) / DAYSPERWEEK,
+ L"%02d", pt, ptlim);
+ continue;
+ case 'u':
+ /*
+ ** From Arnold Robbins' strftime version 3.0:
+ ** "ISO 8601: Weekday as a decimal number
+ ** [1 (Monday) - 7]"
+ ** (ado, 1993-05-24)
+ */
+ pt = _conv((t->tm_wday == 0) ?
+ DAYSPERWEEK : t->tm_wday,
+ L"%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 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;
+ /*
+ ** 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) {
+ ++base;
+ w = 1;
+ break;
+ }
+ if (yday >= bot) {
+ w = 1 + ((yday - bot) / DAYSPERWEEK);
+ break;
+ }
+ --base;
+ yday += isleap_sum(year, base) ?
+ DAYSPERLYEAR :
+ DAYSPERNYEAR;
+ }
+ if ((w == 52 && t->tm_mon == TM_JANUARY) ||
+ (w == 1 && t->tm_mon == TM_DECEMBER))
+ w = 53;
+ if (*format == 'V')
+ pt = _conv(w, L"%02d", 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':
+ /*
+ ** From Arnold Robbins' strftime version 3.0:
+ ** "date as dd-bbb-YYYY"
+ ** (ado, 1993-05-24)
+ */
+ pt = _fmt(L"%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,
+ L"%02d", pt, ptlim);
+ continue;
+ case 'w':
+ pt = _conv(t->tm_wday, L"%d", pt, ptlim);
+ continue;
+ case 'X':
+ pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp);
+ continue;
+ case 'x':
+ {
+ int warn2 = IN_SOME;
+
+ pt = _fmt(Locale->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':
+ if (t->tm_zone != NULL)
+ pt = _sadd(t->TM_ZONE, pt, ptlim);
+ else
+ if (t->tm_isdst >= 0)
+ pt = _sadd(tzname[t->tm_isdst != 0],
+ pt, ptlim);
+ /*
+ ** C99 says that %Z must be replaced by the
+ ** empty string if the time zone is not
+ ** determinable.
+ */
+ continue;
+ case 'z':
+ {
+ int diff;
+ wchar_t const * sign;
+
+ if (t->tm_isdst < 0)
+ continue;
+ diff = t->tm_gmtoff;
+ if (diff < 0) {
+ sign = L"-";
+ diff = -diff;
+ } else
+ sign = L"+";
+ pt = _add(sign, pt, ptlim);
+ diff /= SECSPERMIN;
+ diff = (diff / MINSPERHOUR) * 100 +
+ (diff % MINSPERHOUR);
+ pt = _conv(diff, L"%04d", pt, ptlim);
+ }
+ continue;
+ case '+':
+ pt = _fmt(Locale->date_fmt, t, pt, ptlim, warnp);
+ continue;
+ case '%':
+ /*
+ ** X311J/88-090 (4.12.3.5): if conversion wchar_t is
+ ** undefined, behavior is undefined. Print out the
+ ** character itself as printf(3) also does.
+ */
+ default:
+ if (pt != ptlim)
+ *pt++ = *format;
+ break;
+ }
+ }
+ return pt;
+}
+
+static wchar_t *
+_conv(int n, const wchar_t *format, wchar_t *pt, const wchar_t *ptlim)
+{
+ wchar_t buf[INT_STRLEN_MAXIMUM(int) + 1];
+
+ (void) swprintf(buf, sizeof buf/sizeof buf[0], format, n);
+ return _add(buf, pt, ptlim);
+}
+
+static wchar_t *
+_add(const wchar_t *str, wchar_t *pt, const wchar_t *ptlim)
+{
+ while (pt < ptlim && (*pt = *str++) != L'\0')
+ ++pt;
+ return pt;
+}
+
+static wchar_t *
+_sadd(const char *str, wchar_t *pt, const wchar_t *ptlim)
+{
+ while (pt < ptlim && (*pt = btowc(*str++)) != L'\0')
+ ++pt;
+ return pt;
+}
+/*
+** POSIX and the C Standard are unclear or inconsistent about
+** what %C and %y do if the year is negative or exceeds 9999.
+** Use the convention that %C concatenated with %y yields the
+** same output as %Y, and that %Y contains at least 4 bytes,
+** with more only if necessary.
+*/
+
+static wchar_t *
+_yconv(int a, int b, int convert_top, int convert_yy, wchar_t *pt,
+ const wchar_t *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(L"-0", pt, ptlim);
+ else pt = _conv(lead, L"%02d", pt, ptlim);
+ }
+ if (convert_yy)
+ pt = _conv(((trail < 0) ? -trail : trail), L"%02d", pt, ptlim);
+ return pt;
+}
+
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