+/* strftime - formatted time and date to a string */
/*
* Modified slightly by Chet Ramey for inclusion in Bash
*/
-
/*
* strftime.c
*
* It also doesn't worry about multi-byte characters.
* So there.
*
- * This file is also shipped with GAWK (GNU Awk), gawk specific bits of
- * code are included if GAWK is defined.
- *
* Arnold Robbins
* January, February, March, 1991
* Updated March, April 1992
* Updated July, 1997
* Updated October, 1999
* Updated September, 2000
+ * Updated December, 2001
+ * Updated January, 2011
+ * Updated April, 2012
*
* Fixes from ado@elsie.nci.nih.gov,
* February 1991, May 1992
* July 1997
* Moved to C99 specification.
* September 2000
+ * Fixes from Tanaka Akira <akr@m17n.org>
+ * December 2001
*/
#include <config.h>
-#ifndef GAWK
#include <stdio.h>
#include <ctype.h>
#include <time.h>
-#endif
+
#if defined(TM_IN_SYS_TIME)
#include <sys/types.h>
#include <sys/time.h>
#define SUNOS_EXT 1 /* stuff in SunOS strftime routine */
#define VMS_EXT 1 /* include %v for VMS date format */
#define HPUX_EXT 1 /* non-conflicting stuff in HP-UX date */
-#ifndef GAWK
#define POSIX_SEMANTICS 1 /* call tzset() if TZ changes */
-#endif
+#define POSIX_2008 1 /* flag and fw for C, F, G, Y formats */
#undef strchr /* avoid AIX weirdness */
#define range(low, item, hi) max(low, min(item, hi))
-#if !defined(OS2) && !defined(MSDOS) && defined(HAVE_TZNAME)
+/* Whew! This stuff is a mess. */
+#if !defined(OS2) && !defined(MSDOS) && !defined(__CYGWIN__) && defined(HAVE_TZNAME)
extern char *tzname[2];
extern int daylight;
#if defined(SOLARIS) || defined(mips) || defined (M_UNIX)
extern long int timezone, altzone;
#else
-# if defined (HPUX)
+# if defined (HPUX) || defined(__hpux)
extern long int timezone;
# else
+# if !defined(__CYGWIN__)
extern int timezone, altzone;
-# endif /* !HPUX */
-#endif /* !SOLARIS && !mips && !M_UNIX */
+# endif
+# endif
+#endif
#endif
#undef min /* just in case */
return (a > b ? a : b);
}
+#ifdef POSIX_2008
+/* iso_8601_2000_year --- format a year per ISO 8601:2000 as in 1003.1 */
+
+static void
+iso_8601_2000_year(char *buf, int year, size_t fw)
+{
+ int extra;
+ char sign = '\0';
+
+ if (year >= -9999 && year <= 9999) {
+ sprintf(buf, "%0*d", (int) fw, year);
+ return;
+ }
+
+ /* now things get weird */
+ if (year > 9999) {
+ sign = '+';
+ } else {
+ sign = '-';
+ year = -year;
+ }
+
+ extra = year / 10000;
+ year %= 10000;
+ sprintf(buf, "%c_%04d_%d", sign, extra, year);
+}
+#endif /* POSIX_2008 */
+
/* strftime --- produce formatted time */
size_t
char *start = s;
auto char tbuf[100];
long off;
- int i, w, y;
+ int i, w;
+ long y;
static short first = 1;
#ifdef POSIX_SEMANTICS
static char *savetz = NULL;
#ifndef HAVE_TM_ZONE
#ifndef HAVE_TM_NAME
#ifndef HAVE_TZNAME
+#ifndef __CYGWIN__
extern char *timezone();
struct timeval tv;
struct timezone zone;
+#endif /* __CYGWIN__ */
#endif /* HAVE_TZNAME */
#endif /* HAVE_TM_NAME */
#endif /* HAVE_TM_ZONE */
+#ifdef POSIX_2008
+ int pad;
+ size_t fw;
+ char flag;
+#endif /* POSIX_2008 */
/* various tables, useful in North America */
static const char *days_a[] = {
*s++ = *format;
continue;
}
+#ifdef POSIX_2008
+ pad = '\0';
+ fw = 0;
+ flag = '\0';
+ switch (*++format) {
+ case '+':
+ flag = '+';
+ /* fall through */
+ case '0':
+ pad = '0';
+ format++;
+ break;
+
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ break;
+
+ default:
+ format--;
+ goto again;
+ }
+ for (; isdigit(*format); format++) {
+ fw = fw * 10 + (*format - '0');
+ }
+ format--;
+#endif /* POSIX_2008 */
+
again:
switch (*++format) {
case '\0':
break;
case 'C':
+#ifdef POSIX_2008
+ if (pad != '\0' && fw > 0) {
+ size_t min_fw = (flag ? 3 : 2);
+
+ fw = max(fw, min_fw);
+ sprintf(tbuf, flag
+ ? "%+0*ld"
+ : "%0*ld", (int) fw,
+ (timeptr->tm_year + 1900L) / 100);
+ } else
+#endif /* POSIX_2008 */
century:
- sprintf(tbuf, "%02d", (timeptr->tm_year + 1900) / 100);
+ sprintf(tbuf, "%02ld", (timeptr->tm_year + 1900L) / 100);
break;
case 'd': /* day of the month, 01 - 31 */
goto again;
case 'F': /* ISO 8601 date representation */
+ {
+#ifdef POSIX_2008
+ /*
+ * Field width for %F is for the whole thing.
+ * It must be at least 10.
+ */
+ char m_d[10];
+ strftime(m_d, sizeof m_d, "-%m-%d", timeptr);
+ size_t min_fw = 10;
+
+ if (pad != '\0' && fw > 0) {
+ fw = max(fw, min_fw);
+ } else {
+ fw = min_fw;
+ }
+
+ fw -= 6; /* -XX-XX at end are invariant */
+
+ iso_8601_2000_year(tbuf, timeptr->tm_year + 1900, fw);
+ strcat(tbuf, m_d);
+#else
strftime(tbuf, sizeof tbuf, "%Y-%m-%d", timeptr);
+#endif /* POSIX_2008 */
+ }
break;
case 'g':
*/
w = iso8601wknum(timeptr);
if (timeptr->tm_mon == 11 && w == 1)
- y = 1900 + timeptr->tm_year + 1;
+ y = 1900L + timeptr->tm_year + 1;
else if (timeptr->tm_mon == 0 && w >= 52)
- y = 1900 + timeptr->tm_year - 1;
+ y = 1900L + timeptr->tm_year - 1;
else
- y = 1900 + timeptr->tm_year;
-
- if (*format == 'G')
- sprintf(tbuf, "%d", y);
+ y = 1900L + timeptr->tm_year;
+
+ if (*format == 'G') {
+#ifdef POSIX_2008
+ if (pad != '\0' && fw > 0) {
+ size_t min_fw = 4;
+
+ fw = max(fw, min_fw);
+ sprintf(tbuf, flag
+ ? "%+0*ld"
+ : "%0*ld", (int) fw,
+ y);
+ } else
+#endif /* POSIX_2008 */
+ sprintf(tbuf, "%ld", y);
+ }
else
- sprintf(tbuf, "%02d", y % 100);
+ sprintf(tbuf, "%02ld", y % 100);
break;
case 'h': /* abbreviated month name */
strftime(tbuf, sizeof tbuf, "%H:%M", timeptr);
break;
-#if defined(HAVE_MKTIME) || defined(GAWK)
+#if defined(HAVE_MKTIME)
case 's': /* time as seconds since the Epoch */
{
struct tm non_const_timeptr;
sprintf(tbuf, "%ld", mktime(& non_const_timeptr));
break;
}
-#endif /* defined(HAVE_MKTIME) || defined(GAWK) */
+#endif /* defined(HAVE_MKTIME) */
case 'S': /* second, 00 - 60 */
i = range(0, timeptr->tm_sec, 60);
break;
case 'Y': /* year with century */
- fullyear:
- sprintf(tbuf, "%d", 1900 + timeptr->tm_year);
+#ifdef POSIX_2008
+ if (pad != '\0' && fw > 0) {
+ size_t min_fw = 4;
+
+ fw = max(fw, min_fw);
+ sprintf(tbuf, flag
+ ? "%+0*ld"
+ : "%0*ld", (int) fw,
+ 1900L + timeptr->tm_year);
+ } else
+#endif /* POSIX_2008 */
+ sprintf(tbuf, "%ld", 1900L + timeptr->tm_year);
break;
/*
* us that muck around with various message processors.
*/
case 'z': /* time zone offset east of GMT e.g. -0600 */
+ if (timeptr->tm_isdst < 0)
+ break;
#ifdef HAVE_TM_NAME
/*
* Systems with tm_name probably have tm_tzadj as
* Systems with tzname[] probably have timezone as
* secs west of GMT. Convert to mins east of GMT.
*/
-# ifdef HPUX
+# if defined(__hpux) || defined (HPUX) || defined(__CYGWIN__)
off = -timezone / 60;
# else
- off = -(daylight ? timezone : altzone) / 60;
-# endif /* !HPUX */
+ /* ADR: 4 August 2001, fixed this per gazelle@interaccess.com */
+ off = -(daylight ? altzone : timezone) / 60;
+# endif
#else /* !HAVE_TZNAME */
gettimeofday(& tv, & zone);
off = -zone.tz_minuteswest;
} else {
tbuf[0] = '+';
}
- sprintf(tbuf+1, "%02d%02d", off/60, off%60);
+ sprintf(tbuf+1, "%02ld%02ld", off/60, off%60);
break;
case 'Z': /* time zone name or abbrevation */
#ifdef VMS_EXT
case 'v': /* date as dd-bbb-YYYY */
- sprintf(tbuf, "%2d-%3.3s-%4d",
+ sprintf(tbuf, "%2d-%3.3s-%4ld",
range(1, timeptr->tm_mday, 31),
months_a[range(0, timeptr->tm_mon, 11)],
- timeptr->tm_year + 1900);
+ timeptr->tm_year + 1900L);
for (i = 3; i < 6; i++)
if (islower(tbuf[i]))
tbuf[i] = toupper(tbuf[i]);
/* isleap --- is a year a leap year? */
static int
-isleap(int year)
+isleap(long year)
{
return ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0);
}
dec31ly.tm_mon = 11;
dec31ly.tm_mday = 31;
dec31ly.tm_wday = (jan1day == 0) ? 6 : jan1day - 1;
- dec31ly.tm_yday = 364 + isleap(dec31ly.tm_year + 1900);
+ dec31ly.tm_yday = 364 + isleap(dec31ly.tm_year + 1900L);
weeknum = iso8601wknum(& dec31ly);
#endif
}
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