initial import

1 files changed, 296 insertions, 0 deletions

diff --git a/time/strftime.c b/time/strftime.c
new file mode 100644
index 0000000000..ccc19c72b0
--- /dev/null
+++ b/time/strftime.c
@@ -0,0 +1,296 @@
+/* Extensions for GNU date that are still missing here:
+   -
+   _
+*/
+
+/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <localeinfo.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#ifndef	HAVE_GNU_LD
+#define	__tzname	tzname
+#define	__daylight	daylight
+#define	__timezone	timezone
+#endif
+
+
+#define	add(n, f)							      \
+  do									      \
+    {									      \
+      i += (n);								      \
+      if (i >= maxsize)							      \
+	return 0;							      \
+      else								      \
+	if (p != NULL)							      \
+	  {								      \
+	    f;								      \
+	    p += (n);							      \
+	  }								      \
+    } while (0)
+#define	cpy(n, s)	add((n), memcpy((PTR) p, (PTR) (s), (n)))
+#define	fmt(n, args)	add((n), if (sprintf args != (n)) return 0)
+
+/* Return the week in the year specified by TP,
+   with weeks starting on STARTING_DAY.  */
+#ifdef	__GNUC__
+inline
+#endif
+static unsigned int
+DEFUN(week, (tp, starting_day),
+      CONST struct tm *CONST tp AND int starting_day)
+{
+  int wday, dl;
+
+  wday = tp->tm_wday - starting_day;
+  if (wday < 0)
+    wday += 7;
+
+  /* Set DL to the day in the year of the last day of the week previous to the
+     one containing the day specified in TP.  If DL is negative or zero, the
+     day specified in TP is in the first week of the year.  Otherwise,
+     calculate the number of complete weeks before our week (DL / 7) and
+     add any partial week at the start of the year (DL % 7).  */
+  dl = tp->tm_yday - wday;
+  return dl <= 0 ? 0 : ((dl / 7) + ((dl % 7) == 0 ? 0 : 1));
+}
+
+
+/* Write information from TP into S according to the format
+   string FORMAT, writing no more that MAXSIZE characters
+   (including the terminating '\0') and returning number of
+   characters written.  If S is NULL, nothing will be written
+   anywhere, so to determine how many characters would be
+   written, use NULL for S and (size_t) UINT_MAX for MAXSIZE.  */
+size_t
+DEFUN(strftime, (s, maxsize, format, tp),
+      char *s AND size_t maxsize AND
+      CONST char *format AND register CONST struct tm *tp)
+{
+  CONST char *CONST a_wkday = _time_info->abbrev_wkday[tp->tm_wday];
+  CONST char *CONST f_wkday = _time_info->full_wkday[tp->tm_wday];
+  CONST char *CONST a_month = _time_info->abbrev_month[tp->tm_mon];
+  CONST char *CONST f_month = _time_info->full_month[tp->tm_mon];
+  size_t aw_len = strlen(a_wkday);
+  size_t am_len = strlen(a_month);
+  size_t wkday_len = strlen(f_wkday);
+  size_t month_len = strlen(f_month);
+  int hour12 = tp->tm_hour;
+  CONST char *CONST ampm = _time_info->ampm[hour12 >= 12];
+  size_t ap_len = strlen(ampm);
+  CONST unsigned int y_week0 = week(tp, 0);
+  CONST unsigned int y_week1 = week(tp, 1);
+  CONST char *zone;
+  size_t zonelen;
+  register size_t i = 0;
+  register char *p = s;
+  register CONST char *f;
+
+  if (tp->tm_isdst < 0)
+    {
+      zone = "";
+      zonelen = 0;
+    }
+  else
+    {
+      zone = __tzname[tp->tm_isdst];
+      zonelen = strlen(zone);
+    }
+
+  if (hour12 > 12)
+    hour12 -= 12;
+  else
+    if (hour12 == 0) hour12 = 12;
+
+  for (f = format; *f != '\0'; ++f)
+    {
+      CONST char *subfmt;
+
+      if (!isascii(*f))
+	{
+	  /* Non-ASCII, may be a multibyte.  */
+	  int len = mblen(f, strlen(f));
+	  if (len > 0)
+	    {
+	      cpy(len, f);
+	      continue;
+	    }
+	}
+
+      if (*f != '%')
+	{
+	  add(1, *p = *f);
+	  continue;
+	}
+
+      ++f;
+      switch (*f)
+	{
+	case '\0':
+	case '%':
+	  add(1, *p = *f);
+	  break;
+
+	case 'a':
+	  cpy(aw_len, a_wkday);
+	  break;
+
+	case 'A':
+	  cpy(wkday_len, f_wkday);
+	  break;
+
+	case 'b':
+	case 'h':		/* GNU extension.  */
+	  cpy(am_len, a_month);
+	  break;
+
+	case 'B':
+	  cpy(month_len, f_month);
+	  break;
+
+	case 'c':
+	  subfmt = _time_info->date_time;
+	subformat:
+	  {
+	    size_t len = strftime (p, maxsize - i, subfmt, tp);
+	    add(len, );
+	  }
+	  break;
+
+	case 'C':
+	  fmt (2, (p, "%.2d", (1900 + tp->tm_year) / 100));
+	  break;
+
+	case 'D':		/* GNU extension.  */
+	  subfmt = "%m/%d/%y";
+	  goto subformat;
+
+	case 'd':
+	  fmt(2, (p, "%.2d", tp->tm_mday));
+	  break;
+
+	case 'e':		/* GNU extension: %d, but blank-padded.  */
+	  fmt(2, (p, "%2d", tp->tm_mday));
+	  break;
+
+	case 'H':
+	  fmt(2, (p, "%.2d", tp->tm_hour));
+	  break;
+
+	case 'I':
+	  fmt(2, (p, "%.2d", hour12));
+	  break;
+
+	case 'k':		/* GNU extension.  */
+	  fmt(2, (p, "%2d", tp->tm_hour));
+	  break;
+
+	case 'l':		/* GNU extension.  */
+	  fmt(2, (p, "%2d", hour12));
+	  break;
+
+	case 'j':
+	  fmt(3, (p, "%.3d", 1 + tp->tm_yday));
+	  break;
+
+	case 'M':
+	  fmt(2, (p, "%.2d", tp->tm_min));
+	  break;
+
+	case 'm':
+	  fmt(2, (p, "%.2d", tp->tm_mon + 1));
+	  break;
+
+	case 'n':		/* GNU extension.  */
+	  add (1, *p = '\n');
+	  break;
+
+	case 'p':
+	  cpy(ap_len, ampm);
+	  break;
+
+	case 'R':		/* GNU extension.  */
+	  subfmt = "%H:%M";
+	  goto subformat;
+
+	case 'r':		/* GNU extension.  */
+	  subfmt = "%I:%M:%S %p";
+	  goto subformat;
+
+	case 'S':
+	  fmt(2, (p, "%.2d", tp->tm_sec));
+	  break;
+
+	case 'T':		/* GNU extenstion.  */
+	  subfmt = "%H:%M:%S";
+	  goto subformat;
+
+	case 't':		/* GNU extenstion.  */
+	  add (1, *p = '\t');
+	  break;
+
+	case 'U':
+	  fmt(2, (p, "%.2u", y_week0));
+	  break;
+
+	case 'W':
+	  fmt(2, (p, "%.2u", y_week1));
+	  break;
+
+	case 'w':
+	  fmt(2, (p, "%.2d", tp->tm_wday));
+	  break;
+
+	case 'X':
+	  subfmt = _time_info->time;
+	  goto subformat;
+
+	case 'x':
+	  subfmt = _time_info->date;
+	  goto subformat;
+
+	case 'Y':
+	  fmt(4, (p, "%.4d", 1900 + tp->tm_year));
+	  break;
+
+	case 'y':
+	  fmt(2, (p, "%.2d", tp->tm_year));
+	  break;
+
+	case 'Z':
+	  cpy(zonelen, zone);
+	  break;
+
+	default:
+	  /* Bad format.  */
+	  break;
+	}
+    }
+
+  if (p != NULL)
+    *p = '\0';
+  return i;
+}