39d903aea9
This also brings our copy of strftime.c much closer to upstream, though we still have several GNU extensions and hacks to deal with Android32's broken time_t. Bug: 15765976 Change-Id: Ic9ef36e8acd3619504ecc4d73feec2b61fd4dfa1
728 lines
24 KiB
C
728 lines
24 KiB
C
/*
|
|
** Based on the UCB version with the copyright notice and sccsid
|
|
** appearing below.
|
|
**
|
|
** This is ANSIish only when "multibyte character == plain character".
|
|
*/
|
|
|
|
#include "private.h"
|
|
|
|
/*
|
|
** Copyright (c) 1989 The Regents of the University of California.
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms are permitted
|
|
** provided that the above copyright notice and this paragraph are
|
|
** 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
|
|
** 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
|
|
** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|
** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
#include "tzfile.h"
|
|
#include "fcntl.h"
|
|
#include "locale.h"
|
|
|
|
#if __ANDROID__
|
|
|
|
/* LP32 had a 32-bit time_t, so we need to work around that here. */
|
|
#if defined(__LP64__)
|
|
#define time64_t time_t
|
|
#define mktime64 mktime
|
|
#else
|
|
#include <time64.h>
|
|
#endif
|
|
|
|
#include <ctype.h>
|
|
|
|
#endif
|
|
|
|
struct lc_time_T {
|
|
const char * mon[MONSPERYEAR];
|
|
const char * month[MONSPERYEAR];
|
|
const char * wday[DAYSPERWEEK];
|
|
const char * weekday[DAYSPERWEEK];
|
|
const char * X_fmt;
|
|
const char * x_fmt;
|
|
const char * c_fmt;
|
|
const char * am;
|
|
const char * pm;
|
|
const char * date_fmt;
|
|
};
|
|
|
|
#ifdef LOCALE_HOME
|
|
#include "sys/stat.h"
|
|
static struct lc_time_T localebuf;
|
|
static struct lc_time_T * _loc(void);
|
|
#define Locale _loc()
|
|
#endif /* defined LOCALE_HOME */
|
|
#ifndef LOCALE_HOME
|
|
#define Locale (&C_time_locale)
|
|
#endif /* !defined LOCALE_HOME */
|
|
|
|
static const struct lc_time_T C_time_locale = {
|
|
{
|
|
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
|
|
}, {
|
|
"January", "February", "March", "April", "May", "June",
|
|
"July", "August", "September", "October", "November", "December"
|
|
}, {
|
|
"Sun", "Mon", "Tue", "Wed",
|
|
"Thu", "Fri", "Sat"
|
|
}, {
|
|
"Sunday", "Monday", "Tuesday", "Wednesday",
|
|
"Thursday", "Friday", "Saturday"
|
|
},
|
|
|
|
/* X_fmt */
|
|
"%H:%M:%S",
|
|
|
|
/*
|
|
** x_fmt
|
|
** C99 requires this format.
|
|
** Using just numbers (as here) makes Quakers happier;
|
|
** it's also compatible with SVR4.
|
|
*/
|
|
"%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.
|
|
*/
|
|
"%a %b %e %T %Y",
|
|
|
|
/* am */
|
|
"AM",
|
|
|
|
/* pm */
|
|
"PM",
|
|
|
|
/* date_fmt */
|
|
"%a %b %e %H:%M:%S %Z %Y"
|
|
};
|
|
|
|
static char * _add(const char *, char *, const char *, int);
|
|
static char * _conv(int, const char *, char *, const char *);
|
|
static char * _fmt(const char *, const struct tm *, char *, const char *,
|
|
int *);
|
|
static char * _yconv(int, int, int, int, char *, const char *, int);
|
|
static char * getformat(int, char *, char *, char *, char *);
|
|
|
|
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
|
|
|
|
#define FORCE_LOWER_CASE 0x100
|
|
|
|
size_t
|
|
strftime(char * const s, const size_t maxsize, const char *const format,
|
|
const struct tm *const t)
|
|
{
|
|
char * p;
|
|
int warn;
|
|
|
|
tzset();
|
|
#ifdef LOCALE_HOME
|
|
localebuf.mon[0] = 0;
|
|
#endif /* defined LOCALE_HOME */
|
|
warn = IN_NONE;
|
|
p = _fmt(((format == NULL) ? "%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) fprintf(stderr, "strftime format \"%s\" ",
|
|
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)
|
|
return 0;
|
|
*p = '\0';
|
|
return p - s;
|
|
}
|
|
|
|
static char *getformat(int modifier, char *normal, char *underscore,
|
|
char *dash, char *zero) {
|
|
switch (modifier) {
|
|
case '_':
|
|
return underscore;
|
|
|
|
case '-':
|
|
return dash;
|
|
|
|
case '0':
|
|
return zero;
|
|
}
|
|
|
|
return normal;
|
|
}
|
|
|
|
static char *
|
|
_fmt(const char *format, const struct tm *const t, char * pt,
|
|
const char *const ptlim, int *warnp)
|
|
{
|
|
for ( ; *format; ++format) {
|
|
if (*format == '%') {
|
|
int modifier = 0;
|
|
label:
|
|
switch (*++format) {
|
|
case '\0':
|
|
--format;
|
|
break;
|
|
case 'A':
|
|
pt = _add((t->tm_wday < 0 ||
|
|
t->tm_wday >= DAYSPERWEEK) ?
|
|
"?" : Locale->weekday[t->tm_wday],
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'a':
|
|
pt = _add((t->tm_wday < 0 ||
|
|
t->tm_wday >= DAYSPERWEEK) ?
|
|
"?" : Locale->wday[t->tm_wday],
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'B':
|
|
pt = _add((t->tm_mon < 0 ||
|
|
t->tm_mon >= MONSPERYEAR) ?
|
|
"?" : Locale->month[t->tm_mon],
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'b':
|
|
case 'h':
|
|
pt = _add((t->tm_mon < 0 ||
|
|
t->tm_mon >= MONSPERYEAR) ?
|
|
"?" : Locale->mon[t->tm_mon],
|
|
pt, ptlim, modifier);
|
|
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, modifier);
|
|
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("%m/%d/%y", t, pt, ptlim, warnp);
|
|
continue;
|
|
case 'd':
|
|
pt = _conv(t->tm_mday,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%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 '_':
|
|
case '-':
|
|
case '0':
|
|
case '^':
|
|
case '#':
|
|
modifier = *format;
|
|
goto label;
|
|
case 'e':
|
|
pt = _conv(t->tm_mday,
|
|
getformat(modifier, "%2d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'F':
|
|
pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
|
|
continue;
|
|
case 'H':
|
|
pt = _conv(t->tm_hour,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'I':
|
|
pt = _conv((t->tm_hour % 12) ?
|
|
(t->tm_hour % 12) : 12,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'j':
|
|
pt = _conv(t->tm_yday + 1,
|
|
getformat(modifier, "%03d", "%3d", "%d", "%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,
|
|
getformat(modifier, "%2d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
#ifdef KITCHEN_SINK
|
|
case 'K':
|
|
/*
|
|
** After all this time, still unclaimed!
|
|
*/
|
|
pt = _add("kitchen sink", pt, ptlim);
|
|
continue;
|
|
#endif /* defined KITCHEN_SINK */
|
|
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,
|
|
getformat(modifier, "%2d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'M':
|
|
pt = _conv(t->tm_min,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'm':
|
|
pt = _conv(t->tm_mon + 1,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'n':
|
|
pt = _add("\n", pt, ptlim, modifier);
|
|
continue;
|
|
case 'p':
|
|
pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
|
|
Locale->pm :
|
|
Locale->am,
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'P':
|
|
pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
|
|
Locale->pm :
|
|
Locale->am,
|
|
pt, ptlim, FORCE_LOWER_CASE);
|
|
continue;
|
|
case 'R':
|
|
pt = _fmt("%H:%M", t, pt, ptlim, warnp);
|
|
continue;
|
|
case 'r':
|
|
pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
|
|
continue;
|
|
case 'S':
|
|
pt = _conv(t->tm_sec,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 's':
|
|
{
|
|
struct tm tm;
|
|
char buf[INT_STRLEN_MAXIMUM(
|
|
time64_t) + 1];
|
|
time64_t mkt;
|
|
|
|
tm = *t;
|
|
mkt = mktime64(&tm);
|
|
if (TYPE_SIGNED(time64_t))
|
|
(void) snprintf(buf, sizeof(buf), "%lld",
|
|
(long long) mkt);
|
|
else (void) snprintf(buf, sizeof(buf), "%llu",
|
|
(unsigned long long) mkt);
|
|
pt = _add(buf, pt, ptlim, modifier);
|
|
}
|
|
continue;
|
|
case 'T':
|
|
pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
|
|
continue;
|
|
case 't':
|
|
pt = _add("\t", pt, ptlim, modifier);
|
|
continue;
|
|
case 'U':
|
|
pt = _conv((t->tm_yday + DAYSPERWEEK -
|
|
t->tm_wday) / DAYSPERWEEK,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%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, "%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;
|
|
}
|
|
#ifdef XPG4_1994_04_09
|
|
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,
|
|
getformat(modifier, "%02d", "%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
else if (*format == 'g') {
|
|
*warnp = IN_ALL;
|
|
pt = _yconv(year, base, 0, 1,
|
|
pt, ptlim, modifier);
|
|
} else pt = _yconv(year, base, 1, 1,
|
|
pt, ptlim, modifier);
|
|
}
|
|
continue;
|
|
case 'v':
|
|
/*
|
|
** From Arnold Robbins' strftime version 3.0:
|
|
** "date as dd-bbb-YYYY"
|
|
** (ado, 1993-05-24)
|
|
*/
|
|
pt = _fmt("%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,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'w':
|
|
pt = _conv(t->tm_wday, "%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, modifier);
|
|
continue;
|
|
case 'Y':
|
|
pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1,
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'Z':
|
|
#ifdef TM_ZONE
|
|
if (t->TM_ZONE != NULL)
|
|
pt = _add(t->TM_ZONE, pt, ptlim,
|
|
modifier);
|
|
else
|
|
#endif /* defined TM_ZONE */
|
|
if (t->tm_isdst >= 0)
|
|
pt = _add(tzname[t->tm_isdst != 0],
|
|
pt, ptlim, modifier);
|
|
/*
|
|
** C99 says that %Z must be replaced by the
|
|
** empty string if the time zone is not
|
|
** determinable.
|
|
*/
|
|
continue;
|
|
case 'z':
|
|
{
|
|
long diff;
|
|
char const * sign;
|
|
|
|
if (t->tm_isdst < 0)
|
|
continue;
|
|
#ifdef TM_GMTOFF
|
|
diff = t->TM_GMTOFF;
|
|
#else /* !defined TM_GMTOFF */
|
|
/*
|
|
** C99 says that the UT 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 = -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 */
|
|
if (diff < 0) {
|
|
sign = "-";
|
|
diff = -diff;
|
|
} else sign = "+";
|
|
pt = _add(sign, pt, ptlim, modifier);
|
|
diff /= SECSPERMIN;
|
|
diff = (diff / MINSPERHOUR) * 100 +
|
|
(diff % MINSPERHOUR);
|
|
pt = _conv(diff,
|
|
getformat(modifier, "%04d",
|
|
"%4d", "%d", "%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 char is
|
|
** undefined, behavior is undefined. Print out the
|
|
** character itself as printf(3) also does.
|
|
*/
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (pt == ptlim)
|
|
break;
|
|
*pt++ = *format;
|
|
}
|
|
return pt;
|
|
}
|
|
|
|
static char *
|
|
_conv(const int n, const char *const format, char *const pt,
|
|
const char *const ptlim)
|
|
{
|
|
char buf[INT_STRLEN_MAXIMUM(int) + 1];
|
|
|
|
(void) snprintf(buf, sizeof(buf), format, n);
|
|
return _add(buf, pt, ptlim, 0);
|
|
}
|
|
|
|
static char *
|
|
_add(const char *str, char *pt, const char *const ptlim, int modifier)
|
|
{
|
|
int c;
|
|
|
|
switch (modifier) {
|
|
case FORCE_LOWER_CASE:
|
|
while (pt < ptlim && (*pt = tolower(*str++)) != '\0') {
|
|
++pt;
|
|
}
|
|
break;
|
|
|
|
case '^':
|
|
while (pt < ptlim && (*pt = toupper(*str++)) != '\0') {
|
|
++pt;
|
|
}
|
|
break;
|
|
|
|
case '#':
|
|
while (pt < ptlim && (c = *str++) != '\0') {
|
|
if (isupper(c)) {
|
|
c = tolower(c);
|
|
} else if (islower(c)) {
|
|
c = toupper(c);
|
|
}
|
|
*pt = c;
|
|
++pt;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
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(const int a, const int b, const int convert_top, const int convert_yy,
|
|
char *pt, const char *const ptlim, int modifier)
|
|
{
|
|
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, modifier);
|
|
else pt = _conv(lead, getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim);
|
|
}
|
|
if (convert_yy)
|
|
pt = _conv(((trail < 0) ? -trail : trail), getformat(modifier, "%02d", "%2d", "%d", "%02d"), pt, ptlim);
|
|
return pt;
|
|
}
|