Libc-1439.100.3.tar.gz

[apple/libc.git] / stdtime / FreeBSD / strftime.c

diff --git a/stdtime/FreeBSD/strftime.c b/stdtime/FreeBSD/strftime.c
index 565c6d1c8ef1dcb5dc1d34dd828c75a30cc76651..0300e2b45ba8af4d66ff4d0fc58d28bfce0bf8f9 100644 (file)
--- a/stdtime/FreeBSD/strftime.c
+++ b/stdtime/FreeBSD/strftime.c
@@ -7,7 +7,7 @@
  * 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
  * 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
+ * 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
  * 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


@@ -15,15 +15,18 @@
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 

-#ifndef lint
-#ifndef NOID
-static const char      elsieid[] = "@(#)strftime.c     7.38";
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunreachable-code"
+
+#if 0
+static const char      elsieid[] = "@(#)strftime.3     8.3";

 /*
 ** Based on the UCB version with the ID appearing below.
 ** This is ANSIish only when "multibyte character == plain character".
 */
 /*
 ** 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 */
+#endif
+
+#include "xlocale_private.h"

 
 #include "namespace.h"
 #include "private.h"
 
 #include "namespace.h"
 #include "private.h"


@@ -32,97 +35,184 @@ static const char  elsieid[] = "@(#)strftime.c     7.38";
 static const char      sccsid[] = "@(#)strftime.c      5.4 (Berkeley) 3/14/89";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
 static const char      sccsid[] = "@(#)strftime.c      5.4 (Berkeley) 3/14/89";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>

-__FBSDID("$FreeBSD: src/lib/libc/stdtime/strftime.c,v 1.38 2002/09/06 11:24:03 tjr Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/stdtime/strftime.c,v 1.44 2009/06/09 09:02:58 delphij Exp $");

 
 #include "tzfile.h"
 
 #include "tzfile.h"

+#include <time.h>

 #include <fcntl.h>
 #include <sys/stat.h>
 #include "un-namespace.h"
 #include "timelocal.h"
 
 #include <fcntl.h>
 #include <sys/stat.h>
 #include "un-namespace.h"
 #include "timelocal.h"
 

+#if !BUILDING_VARIANT

 static char *  _add(const char *, char *, const char *);
 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 *);
-
-size_t strftime(char * __restrict, size_t, const char * __restrict,
-    const struct tm * __restrict);
+static char *  _conv(int, const char *, char *, const char *, locale_t);
+static char *  _yconv(int, int, int, int, char *, const char *, locale_t);
+#endif
+#define        _fmt    _st_fmt
+__private_extern__ char *      _fmt(const char *, const struct tm *, char *, const char *,
+                       int *, struct lc_time_T *, locale_t);

 
 extern char *  tzname[];
 
 extern char *  tzname[];

+extern long __darwin_altzone;          /* DST timezone offset */
+#define altzone __darwin_altzone
+__private_extern__ long _st_get_timezone(void);
+
+#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
+
+#define PAD_DEFAULT    0
+#define PAD_LESS       1
+#define PAD_SPACE      2
+#define PAD_ZERO       3
+
+#ifndef BUILDING_VARIANT
+static const char * const fmt_padding[][4] = {
+       /* DEFAULT,     LESS,   SPACE,  ZERO */
+#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" }
+};
+#endif
+
+#define USG_COMPAT
+#define ALTZONE

 
 size_t
 
 size_t

-strftime(char * __restrict s, size_t maxsize, const char * __restrict format,
-    const struct tm * __restrict t)
+strftime_l(char * __restrict s, size_t maxsize, const char * __restrict format,
+    const struct tm * __restrict t, locale_t loc)

 {
 {

-       char *p;
+       char *  p;
+       int     warn;

 
 

+       NORMALIZE_LOCALE(loc);

        tzset();
        tzset();

-       p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize);
+       warn = IN_NONE;
+       p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn, __get_current_time_locale(loc), loc);
+#ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
+       if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) {
+               (void) fputs("\n", stderr);
+               if (format == NULL)
+                       (void) fputs("NULL strftime format ", stderr);
+               else    (void) fprintf_l(stderr, loc, "strftime format \"%s\" ",
+                               format);
+               (void) fputs("yields only two digits of years in ", stderr);
+               if (warn == IN_SOME)
+                       (void) fputs("some locales", stderr);
+               else if (warn == IN_THIS)
+                       (void) fputs("the current locale", stderr);
+               else    (void) fputs("all locales", stderr);
+               (void) fputs("\n", stderr);
+       }
+#endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */

        if (p == s + maxsize)
                return 0;
        *p = '\0';
        return p - s;
 }
 
        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;
+size_t
+strftime(char * __restrict s, size_t maxsize, const char * __restrict format,
+    const struct tm * __restrict t)
+{
+       return strftime_l(s, maxsize, format, t, __current_locale());
+}
+
+#ifndef BUILDING_VARIANT
+__private_extern__ char *
+_fmt(format, t, pt, ptlim, warnp, tptr, loc)
+const char *           format;
+const struct tm * const        t;
+char *                 pt;
+const char * const     ptlim;
+int *                  warnp;
+struct lc_time_T *     tptr;
+locale_t               loc;

 {
 {

-       int Ealternative, Oalternative;
-       struct lc_time_T *tptr = __get_current_time_locale();
+       int Ealternative, Oalternative, PadIndex;

 
        for ( ; *format; ++format) {
                if (*format == '%') {
                        Ealternative = 0;
                        Oalternative = 0;
 
        for ( ; *format; ++format) {
                if (*format == '%') {
                        Ealternative = 0;
                        Oalternative = 0;

+                       PadIndex         = PAD_DEFAULT;

 label:
                        switch (*++format) {
                        case '\0':
                                --format;
                                break;
                        case 'A':
 label:
                        switch (*++format) {
                        case '\0':
                                --format;
                                break;
                        case 'A':

-                               pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+                               pt = _add((t->tm_wday < 0 ||
+                                       t->tm_wday >= DAYSPERWEEK) ?

                                        "?" : tptr->weekday[t->tm_wday],
                                        pt, ptlim);
                                continue;
                        case 'a':
                                        "?" : tptr->weekday[t->tm_wday],
                                        pt, ptlim);
                                continue;
                        case 'a':

-                               pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+                               pt = _add((t->tm_wday < 0 ||
+                                       t->tm_wday >= DAYSPERWEEK) ?

                                        "?" : tptr->wday[t->tm_wday],
                                        pt, ptlim);
                                continue;
                        case 'B':
                                        "?" : tptr->wday[t->tm_wday],
                                        pt, ptlim);
                                continue;
                        case 'B':

-                               pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ? 
+                               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':
                                        "?" : (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 > 11) ?
+                               pt = _add((t->tm_mon < 0 ||
+                                       t->tm_mon >= MONSPERYEAR) ?

                                        "?" : tptr->mon[t->tm_mon],
                                        pt, ptlim);
                                continue;
                        case 'C':
                                /*
                                ** %C used to do a...
                                        "?" : tptr->mon[t->tm_mon],
                                        pt, ptlim);
                                continue;
                        case 'C':
                                /*
                                ** %C used to do a...

-                               **      _fmt("%a %b %e %X %Y", t);
+                               **      _fmt("%a %b %e %X %Y", t, tptr, loc);

                                ** ...whereas now POSIX 1003.2 calls for
                                ** something completely different.
                                ** ...whereas now POSIX 1003.2 calls for
                                ** something completely different.

-                               ** (ado, 5/24/93)
+                               ** (ado, 1993-05-24)

                                */
                                */

-                               pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
-                                       "%02d", pt, ptlim);
+                               pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0,
+                                       pt, ptlim, loc);

                                continue;
                        case 'c':
                                continue;
                        case 'c':

-                               pt = _fmt(tptr->c_fmt, t, pt, ptlim);
+                               {
+                               int warn2 = IN_SOME;
+
+                               pt = _fmt(tptr->c_fmt, t, pt, ptlim, &warn2, tptr, loc);
+                               if (warn2 == IN_ALL)
+                                       warn2 = IN_THIS;
+                               if (warn2 > *warnp)
+                                       *warnp = warn2;
+                               }

                                continue;
                        case 'D':
                                continue;
                        case 'D':

-                               pt = _fmt("%m/%d/%y", t, pt, ptlim);
+                               pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 'd':
                                continue;
                        case 'd':

-                               pt = _conv(t->tm_mday, "%02d", pt, ptlim);
+                               pt = _conv(t->tm_mday, fmt_padding[PAD_FMT_DAYOFMONTH][PadIndex],
+                                       pt, ptlim, loc);

                                continue;
                        case 'E':
                                if (Ealternative || Oalternative)
                                continue;
                        case 'E':
                                if (Ealternative || Oalternative)


@@ -131,52 +221,54 @@ label:
                                goto label;
                        case 'O':
                                /*
                                goto label;
                        case 'O':
                                /*

-                               ** POSIX locale extensions, a la
-                               ** Arnold Robbins' strftime version 3.0.
+                               ** C99 locale modifiers.

                                ** The sequences
                                ** The sequences

-                               **      %Ec %EC %Ex %EX %Ey %EY
+                               **      %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.
                                **      %Od %oe %OH %OI %Om %OM
                                **      %OS %Ou %OU %OV %Ow %OW %Oy
                                ** are supposed to provide alternate
                                ** representations.

-                               ** (ado, 5/24/93)

                                **
                                **

-                               ** FreeBSD extensions
-                               **      %OB %Ef %EF
+                               ** FreeBSD extension
+                               **      %OB

                                */
                                if (Ealternative || Oalternative)
                                        break;
                                Oalternative++;
                                goto label;
                        case 'e':
                                */
                                if (Ealternative || Oalternative)
                                        break;
                                Oalternative++;
                                goto label;
                        case 'e':

-                               pt = _conv(t->tm_mday, "%2d", pt, ptlim);
+                               pt = _conv(t->tm_mday,
+                                       fmt_padding[PAD_FMT_SDAYOFMONTH][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'F':
                                continue;
                        case 'F':

-                               pt = _fmt("%Y-%m-%d", t, pt, ptlim);
+                               pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 'H':
                                continue;
                        case 'H':

-                               pt = _conv(t->tm_hour, "%02d", pt, ptlim);
+                               pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_HMS][PadIndex],
+                                       pt, ptlim, loc);

                                continue;
                        case 'I':
                                pt = _conv((t->tm_hour % 12) ?
                                        (t->tm_hour % 12) : 12,
                                continue;
                        case 'I':
                                pt = _conv((t->tm_hour % 12) ?
                                        (t->tm_hour % 12) : 12,

-                                       "%02d", pt, ptlim);
+                                       fmt_padding[PAD_FMT_HMS][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'j':
                                continue;
                        case 'j':

-                               pt = _conv(t->tm_yday + 1, "%03d", pt, ptlim);
+                               pt = _conv(t->tm_yday + 1,
+                                       fmt_padding[PAD_FMT_DAYOFYEAR][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'k':
                                /*
                                ** This used to be...
                                **      _conv(t->tm_hour % 12 ?
                                continue;
                        case 'k':
                                /*
                                ** This used to be...
                                **      _conv(t->tm_hour % 12 ?

-                               **              t->tm_hour % 12 : 12, 2, ' ');
+                               **              t->tm_hour % 12 : 12, 2, ' ', loc);

                                ** ...and has been changed to the below to
                                ** match SunOS 4.1.1 and Arnold Robbins'
                                ** ...and has been changed to the below to
                                ** match SunOS 4.1.1 and Arnold Robbins'

-                               ** strftime version 3.0.  That is, "%k" and
+                               ** strftime version 3.0. That is, "%k" and

                                ** "%l" have been swapped.
                                ** "%l" have been swapped.

-                               ** (ado, 5/24/93)
+                               ** (ado, 1993-05-24)

                                */
                                */

-                               pt = _conv(t->tm_hour, "%2d", pt, ptlim);
+                               pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_SHMS][PadIndex],
+                                       pt, ptlim, loc);

                                continue;
 #ifdef KITCHEN_SINK
                        case 'K':
                                continue;
 #ifdef KITCHEN_SINK
                        case 'K':


@@ -192,37 +284,41 @@ label:
                                **      _conv(t->tm_hour, 2, ' ');
                                ** ...and has been changed to the below to
                                ** match SunOS 4.1.1 and Arnold Robbin's
                                **      _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
+                               ** strftime version 3.0. That is, "%k" and

                                ** "%l" have been swapped.
                                ** "%l" have been swapped.

-                               ** (ado, 5/24/93)
+                               ** (ado, 1993-05-24)

                                */
                                pt = _conv((t->tm_hour % 12) ?
                                        (t->tm_hour % 12) : 12,
                                */
                                pt = _conv((t->tm_hour % 12) ?
                                        (t->tm_hour % 12) : 12,

-                                       "%2d", pt, ptlim);
+                                       fmt_padding[PAD_FMT_SHMS][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'M':
                                continue;
                        case 'M':

-                               pt = _conv(t->tm_min, "%02d", pt, ptlim);
+                               pt = _conv(t->tm_min, fmt_padding[PAD_FMT_HMS][PadIndex],
+                                       pt, ptlim, loc);

                                continue;
                        case 'm':
                                continue;
                        case 'm':

-                               pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
+                               pt = _conv(t->tm_mon + 1,
+                                       fmt_padding[PAD_FMT_MONTH][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'n':
                                pt = _add("\n", pt, ptlim);
                                continue;
                        case 'p':
                                continue;
                        case 'n':
                                pt = _add("\n", pt, ptlim);
                                continue;
                        case 'p':

-                               pt = _add((t->tm_hour >= 12) ?
+                               pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?

                                        tptr->pm :
                                        tptr->am,
                                        pt, ptlim);
                                continue;
                        case 'R':
                                        tptr->pm :
                                        tptr->am,
                                        pt, ptlim);
                                continue;
                        case 'R':

-                               pt = _fmt("%H:%M", t, pt, ptlim);
+                               pt = _fmt("%H:%M", t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 'r':
                                continue;
                        case 'r':

-                               pt = _fmt(tptr->ampm_fmt, t, pt, ptlim);
+                               pt = _fmt(tptr->ampm_fmt, t, pt, ptlim,
+                                       warnp, tptr, loc);

                                continue;
                        case 'S':
                                continue;
                        case 'S':

-                               pt = _conv(t->tm_sec, "%02d", pt, ptlim);
+                               pt = _conv(t->tm_sec, fmt_padding[PAD_FMT_HMS][PadIndex],
+                                       pt, ptlim, loc);

                                continue;
                        case 's':
                                {
                                continue;
                        case 's':
                                {


@@ -234,38 +330,40 @@ label:
                                        tm = *t;
                                        mkt = mktime(&tm);
                                        if (TYPE_SIGNED(time_t))
                                        tm = *t;
                                        mkt = mktime(&tm);
                                        if (TYPE_SIGNED(time_t))

-                                               (void) sprintf(buf, "%ld",
+                                               (void) sprintf_l(buf, loc, "%ld",

                                                        (long) mkt);
                                                        (long) mkt);

-                                       else    (void) sprintf(buf, "%lu",
+                                       else    (void) sprintf_l(buf, loc, "%lu",

                                                        (unsigned long) mkt);
                                        pt = _add(buf, pt, ptlim);
                                }
                                continue;
                        case 'T':
                                                        (unsigned long) mkt);
                                        pt = _add(buf, pt, ptlim);
                                }
                                continue;
                        case 'T':

-                               pt = _fmt("%H:%M:%S", t, pt, ptlim);
+                               pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 't':
                                pt = _add("\t", pt, ptlim);
                                continue;
                        case 'U':
                                continue;
                        case 't':
                                pt = _add("\t", pt, ptlim);
                                continue;
                        case 'U':

-                               pt = _conv((t->tm_yday + 7 - t->tm_wday) / 7,
-                                       "%02d", pt, ptlim);
+                               pt = _conv((t->tm_yday + DAYSPERWEEK -
+                                       t->tm_wday) / DAYSPERWEEK,
+                                       fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'u':
                                /*
                                ** From Arnold Robbins' strftime version 3.0:
                                ** "ISO 8601: Weekday as a decimal number
                                ** [1 (Monday) - 7]"
                                continue;
                        case 'u':
                                /*
                                ** From Arnold Robbins' strftime version 3.0:
                                ** "ISO 8601: Weekday as a decimal number
                                ** [1 (Monday) - 7]"

-                               ** (ado, 5/24/93)
+                               ** (ado, 1993-05-24)

                                */
                                */

-                               pt = _conv((t->tm_wday == 0) ? 7 : t->tm_wday,
-                                       "%d", pt, ptlim);
+                               pt = _conv((t->tm_wday == 0) ?
+                                       DAYSPERWEEK : t->tm_wday,
+                                       "%d", pt, ptlim, loc);

                                continue;
                        case 'V':       /* ISO 8601 week number */
                        case 'G':       /* ISO 8601 year (four digits) */
                        case 'g':       /* ISO 8601 year (two digits) */
 /*
                                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
+** 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)
 ** year (the first Monday as the first day of week 1) as a decimal number
 ** (01-53)."
 ** (ado, 1993-05-24)


@@ -278,17 +376,19 @@ label:
 ** 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)
 ** 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
+** 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;
 ** 1997 lasts from 1996-12-30 to 1997-01-05..."
 ** (ado, 1996-01-02)
 */
                                {
                                        int     year;

+                                       int     base;

                                        int     yday;
                                        int     wday;
                                        int     w;
 
                                        int     yday;
                                        int     wday;
                                        int     w;
 

-                                       year = t->tm_year + TM_YEAR_BASE;
+                                       year = t->tm_year;
+                                       base = TM_YEAR_BASE;

                                        yday = t->tm_yday;
                                        wday = t->tm_wday;
                                        for ( ; ; ) {
                                        yday = t->tm_yday;
                                        wday = t->tm_wday;
                                        for ( ; ; ) {


@@ -296,7 +396,7 @@ label:
                                                int     bot;
                                                int     top;
 
                                                int     bot;
                                                int     top;
 

-                                               len = isleap(year) ?
+                                               len = isleap_sum(year, base) ?

                                                        DAYSPERLYEAR :
                                                        DAYSPERNYEAR;
                                                /*
                                                        DAYSPERLYEAR :
                                                        DAYSPERNYEAR;
                                                /*


@@ -315,7 +415,7 @@ label:
                                                        top += DAYSPERWEEK;
                                                top += len;
                                                if (yday >= top) {
                                                        top += DAYSPERWEEK;
                                                top += len;
                                                if (yday >= top) {

-                                                       ++year;
+                                                       ++base;

                                                        w = 1;
                                                        break;
                                                }
                                                        w = 1;
                                                        break;
                                                }


@@ -324,93 +424,164 @@ label:
                                                                DAYSPERWEEK);
                                                        break;
                                                }
                                                                DAYSPERWEEK);
                                                        break;
                                                }

-                                               --year;
-                                               yday += isleap(year) ?
+                                               --base;
+                                               yday += isleap_sum(year, base) ?

                                                        DAYSPERLYEAR :
                                                        DAYSPERNYEAR;
                                        }
 #ifdef XPG4_1994_04_09
                                                        DAYSPERLYEAR :
                                                        DAYSPERNYEAR;
                                        }
 #ifdef XPG4_1994_04_09

-                                       if ((w == 52
-                                            && t->tm_mon == TM_JANUARY)
-                                           || (w == 1
-                                               && t->tm_mon == TM_DECEMBER))
-                                               w = 53;
+                                       if ((w == 52 &&
+                                               t->tm_mon == TM_JANUARY) ||
+                                               (w == 1 &&
+                                               t->tm_mon == TM_DECEMBER))
+                                                       w = 53;

 #endif /* defined XPG4_1994_04_09 */
                                        if (*format == 'V')
 #endif /* defined XPG4_1994_04_09 */
                                        if (*format == 'V')

-                                               pt = _conv(w, "%02d",
-                                                       pt, ptlim);
+                                               pt = _conv(w, fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex],
+                                                       pt, ptlim, loc);

                                        else if (*format == 'g') {
                                        else if (*format == 'g') {

-                                               pt = _conv(year % 100, "%02d",
-                                                       pt, ptlim);
-                                       } else  pt = _conv(year, "%04d",
-                                                       pt, ptlim);
+                                               *warnp = IN_ALL;
+                                               pt = _yconv(year, base, 0, 1,
+                                                       pt, ptlim, loc);
+                                       } else  pt = _yconv(year, base, 1, 1,
+                                                       pt, ptlim, loc);

                                }
                                continue;
                        case 'v':
                                /*
                                ** From Arnold Robbins' strftime version 3.0:
                                ** "date as dd-bbb-YYYY"
                                }
                                continue;
                        case 'v':
                                /*
                                ** From Arnold Robbins' strftime version 3.0:
                                ** "date as dd-bbb-YYYY"

-                               ** (ado, 5/24/93)
+                               ** (ado, 1993-05-24)

                                */
                                */

-                               pt = _fmt("%e-%b-%Y", t, pt, ptlim);
+                               pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 'W':
                                continue;
                        case 'W':

-                               pt = _conv((t->tm_yday + 7 -
+                               pt = _conv((t->tm_yday + DAYSPERWEEK -

                                        (t->tm_wday ?
                                        (t->tm_wday ?

-                                       (t->tm_wday - 1) : 6)) / 7,
-                                       "%02d", pt, ptlim);
+                                       (t->tm_wday - 1) :
+                                       (DAYSPERWEEK - 1))) / DAYSPERWEEK,
+                                       fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim, loc);

                                continue;
                        case 'w':
                                continue;
                        case 'w':

-                               pt = _conv(t->tm_wday, "%d", pt, ptlim);
+                               pt = _conv(t->tm_wday, "%d", pt, ptlim, loc);

                                continue;
                        case 'X':
                                continue;
                        case 'X':

-                               pt = _fmt(tptr->X_fmt, t, pt, ptlim);
+                               pt = _fmt(tptr->X_fmt, t, pt, ptlim, warnp, tptr, loc);

                                continue;
                        case 'x':
                                continue;
                        case 'x':

-                               pt = _fmt(tptr->x_fmt, t, pt, ptlim);
+                               {
+                               int     warn2 = IN_SOME;
+
+                               pt = _fmt(tptr->x_fmt, t, pt, ptlim, &warn2, tptr, loc);
+                               if (warn2 == IN_ALL)
+                                       warn2 = IN_THIS;
+                               if (warn2 > *warnp)
+                                       *warnp = warn2;
+                               }

                                continue;
                        case 'y':
                                continue;
                        case 'y':

-                               pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
-                                       "%02d", pt, ptlim);
+                               *warnp = IN_ALL;
+                               pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1,
+                                       pt, ptlim, loc);

                                continue;
                        case 'Y':
                                continue;
                        case 'Y':

-                               pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
-                                       pt, ptlim);
+                               pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1,
+                                       pt, ptlim, loc);

                                continue;
                        case 'Z':
                                continue;
                        case 'Z':

-                               if (t->tm_zone != NULL)
-                                       pt = _add(t->tm_zone, pt, ptlim);
+#ifdef TM_ZONE
+                               if (t->TM_ZONE != NULL)
+                                       pt = _add(t->TM_ZONE, pt, ptlim);

                                else
                                else

-                               if (t->tm_isdst == 0 || t->tm_isdst == 1) {
-                                       pt = _add(tzname[t->tm_isdst],
+#endif /* defined TM_ZONE */
+                               if (t->tm_isdst >= 0)
+                                       pt = _add(tzname[t->tm_isdst != 0],

                                                pt, ptlim);
                                                pt, ptlim);

-                               } else  pt = _add("?", pt, ptlim);
+                               /*
+                               ** C99 says that %Z must be replaced by the
+                               ** empty string if the time zone is not
+                               ** determinable.
+                               */

                                continue;
                        case 'z':
                                {
                                continue;
                        case 'z':
                                {

-                                       long absoff;
-                                       if (t->tm_gmtoff >= 0) {
-                                               absoff = t->tm_gmtoff;
-                                               pt = _add("+", pt, ptlim);
-                                       } else {
-                                               absoff = -t->tm_gmtoff;
-                                               pt = _add("-", pt, ptlim);
-                                       }
-                                       pt = _conv(absoff / 3600, "%02d",
-                                               pt, ptlim);
-                                       pt = _conv((absoff % 3600) / 60, "%02d",
-                                               pt, ptlim);
-                               };
+                               int             diff;
+                               char const *    sign;
+
+                               if (t->tm_isdst < 0)
+                                       continue;
+#if defined(TM_GMTOFF) && !__DARWIN_UNIX03
+                               diff = t->TM_GMTOFF;
+#else /* !defined TM_GMTOFF || __DARWIN_UNIX03 */
+                               /*
+                               ** C99 says that the UTC offset must
+                               ** be computed by looking only at
+                               ** tm_isdst. This requirement is
+                               ** incorrect, since it means the code
+                               ** must rely on magic (in this case
+                               ** altzone and timezone), and the
+                               ** magic might not have the correct
+                               ** offset. Doing things correctly is
+                               ** tricky and requires disobeying C99;
+                               ** see GNU C strftime for details.
+                               ** For now, punt and conform to the
+                               ** standard, even though it's incorrect.
+                               **
+                               ** C99 says that %z must be replaced by the
+                               ** empty string if the time zone is not
+                               ** determinable, so output nothing if the
+                               ** appropriate variables are not available.
+                               */
+                               if (t->tm_isdst == 0)
+#ifdef USG_COMPAT
+                                       diff = -_st_get_timezone();
+#else /* !defined USG_COMPAT */
+                                       continue;
+#endif /* !defined USG_COMPAT */
+                               else
+#ifdef ALTZONE
+                                       diff = -altzone;
+#else /* !defined ALTZONE */
+                                       continue;
+#endif /* !defined ALTZONE */
+#endif /* !defined TM_GMTOFF || __DARWIN_UNIX03 */
+                               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, loc);
+                               }

                                continue;
                        case '+':
                                continue;
                        case '+':

-                               pt = _fmt(tptr->date_fmt, t, pt, ptlim);
+                               pt = _fmt(tptr->date_fmt, t, pt, ptlim,
+                                       warnp, tptr, loc);

                                continue;
                                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 '%':
                        /*
                        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.
-                        */
+                       ** 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;
                        }
                        default:
                                break;
                        }


@@ -423,25 +594,70 @@ label:
 }
 
 static char *
 }
 
 static char *

-_conv(n, format, pt, ptlim)
-       const int n;
-       const char *const format;
-       char *const pt;
-       const char *const ptlim;
+_conv(n, format, pt, ptlim, loc)
+const int              n;
+const char * const     format;
+char * const           pt;
+const char * const     ptlim;
+locale_t               loc;

 {
        char    buf[INT_STRLEN_MAXIMUM(int) + 1];
 
 {
        char    buf[INT_STRLEN_MAXIMUM(int) + 1];
 

-       (void) sprintf(buf, format, n);
+       (void) sprintf_l(buf, loc, format, n);

        return _add(buf, pt, ptlim);
 }
 
 static char *
 _add(str, pt, ptlim)
        return _add(buf, pt, ptlim);
 }
 
 static char *
 _add(str, pt, ptlim)

-       const char *str;
-       char *pt;
-       const char *const ptlim;
+const char *           str;
+char *                 pt;
+const char * const     ptlim;

 {
        while (pt < ptlim && (*pt = *str++) != '\0')
                ++pt;
        return pt;
 }
 {
        while (pt < ptlim && (*pt = *str++) != '\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 char *
+_yconv(a, b, convert_top, convert_yy, pt, ptlim, loc)
+const int              a;
+const int              b;
+const int              convert_top;
+const int              convert_yy;
+char *                 pt;
+const char * const     ptlim;
+locale_t               loc;
+{
+       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, loc);
+       }
+       if (convert_yy)
+               pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim, loc);
+       return pt;
+}
+#endif /* !BUILDING_VARIANT */
+#pragma clang diagnostic pop