* 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
#ifndef lint
#ifndef NOID
-static const char elsieid[] = "@(#)strftime.c 7.38";
+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".
#endif /* !defined NOID */
#endif /* !defined lint */
+#include "xlocale_private.h"
+
#include "namespace.h"
#include "private.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 <time.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 * _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[];
+__private_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* 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
-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();
- 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;
}
-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;
+ PadIndex = PAD_DEFAULT;
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':
- 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':
- 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':
- 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...
- ** _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.
- ** (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':
- 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':
- pt = _fmt("%m/%d/%y", t, pt, ptlim);
+ pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp, tptr, loc);
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)
goto label;
case 'O':
/*
- ** POSIX locale extensions, a la
- ** Arnold Robbins' strftime version 3.0.
+ ** C99 locale modifiers.
** 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.
- ** (ado, 5/24/93)
**
- ** FreeBSD extensions
- ** %OB %Ef %EF
+ ** FreeBSD extension
+ ** %OB
*/
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':
- pt = _fmt("%Y-%m-%d", t, pt, ptlim);
+ pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp, tptr, loc);
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,
- "%02d", pt, ptlim);
+ fmt_padding[PAD_FMT_HMS][PadIndex], pt, ptlim, loc);
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 ?
- ** 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'
- ** strftime version 3.0. That is, "%k" and
+ ** strftime version 3.0. That is, "%k" and
** "%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':
** _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.
- ** (ado, 5/24/93)
+ ** (ado, 1993-05-24)
*/
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':
- 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':
- 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':
- pt = _add((t->tm_hour >= 12) ?
+ pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
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':
- pt = _fmt(tptr->ampm_fmt, t, pt, ptlim);
+ pt = _fmt(tptr->ampm_fmt, t, pt, ptlim,
+ warnp, tptr, loc);
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':
{
tm = *t;
mkt = mktime(&tm);
if (TYPE_SIGNED(time_t))
- (void) sprintf(buf, "%ld",
+ (void) sprintf_l(buf, loc, "%ld",
(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':
- 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':
- 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]"
- ** (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) */
/*
-** 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)
** 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;
+ int base;
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 ( ; ; ) {
int bot;
int top;
- len = isleap(year) ?
+ len = isleap_sum(year, base) ?
DAYSPERLYEAR :
DAYSPERNYEAR;
/*
top += DAYSPERWEEK;
top += len;
if (yday >= top) {
- ++year;
+ ++base;
w = 1;
break;
}
DAYSPERWEEK);
break;
}
- --year;
- yday += isleap(year) ?
+ --base;
+ yday += isleap_sum(year, base) ?
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')
- pt = _conv(w, "%02d",
- pt, ptlim);
+ pt = _conv(w, fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex],
+ pt, ptlim, loc);
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"
- ** (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':
- pt = _conv((t->tm_yday + 7 -
+ pt = _conv((t->tm_yday + DAYSPERWEEK -
(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':
- pt = _conv(t->tm_wday, "%d", pt, ptlim);
+ pt = _conv(t->tm_wday, "%d", pt, ptlim, loc);
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':
- 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':
- 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':
- 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':
- 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
- 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);
- } 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':
{
- 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 '+':
- pt = _fmt(tptr->date_fmt, t, pt, ptlim);
+ pt = _fmt(tptr->date_fmt, t, pt, ptlim,
+ warnp, tptr, loc);
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 '%':
/*
- * 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;
}
}
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];
- (void) sprintf(buf, format, n);
+ (void) sprintf_l(buf, loc, format, n);
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;
}
+
+/*
+** 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 */
projects / apple / libc.git / blobdiff