initial checkin

lib/libc/stdtime/Makefile

@@ -0,0 +1,25 @@
+#
+# Makefile for libc/stdtime.
+#
+# $Id: Makefile,v 1.1 1997/09/21 06:22:10 gdr Exp $
+#
+
+.INCLUDE:	../../../paths.mk
+.INCLUDE: 	../../const.mk
+
+OBJS	= asctime.o difftime.o localtime.o strftime.o
+
+CFLAGS	+= -v
+
+default:
+	@echo do not use this directory yet
+
+build:	../libc
+obj:	$(OBJS)
+
+.INCLUDE:	../rules.mk
+
+asctime.o::	private.h
+difftime.o::	private.h
+localtime.o::	private.h
+strftime.o::	private.h

lib/libc/stdtime/asctime.c

@@ -0,0 +1,71 @@
+/*
+ * $Id: asctime.c,v 1.1 1997/09/21 06:22:10 gdr Exp $
+ *
+ * This file is formatted for tab stops every 8 columns.
+ */
+
+#ifdef __ORCAC__
+segment "libc_stdtm";
+#define NOID
+#endif
+
+#ifndef lint
+#ifndef NOID
+static char	elsieid[] = "@(#)asctime.c	7.5";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+#include "tzfile.h"
+
+/*
+** A la X3J11, with core dump avoidance.
+*/
+
+char *
+#ifdef USE_PROTOS
+asctime(register const struct tm *timeptr)
+#else
+asctime(timeptr)
+	register const struct tm *timeptr;
+#endif
+{
+	static const char	wday_name[][3] = {
+		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+	};
+	static const char	mon_name[][3] = {
+		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+	};
+	/*
+	** Big enough for something such as
+	** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n
+	** (two three-character abbreviations, five strings denoting integers,
+	** three explicit spaces, two explicit colons, a newline,
+	** and a trailing ASCII nul).
+	*/
+	static char		result[3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) +
+					3 + 2 + 1 + 1];
+	register const char *	wn;
+	register const char *	mn;
+
+	if (timeptr->tm_wday < 0 || timeptr->tm_wday >= DAYSPERWEEK)
+		wn = "???";
+	else	wn = wday_name[timeptr->tm_wday];
+	if (timeptr->tm_mon < 0 || timeptr->tm_mon >= MONSPERYEAR)
+		mn = "???";
+	else	mn = mon_name[timeptr->tm_mon];
+	/*
+	** The X3J11-suggested format is
+	**	"%.3s %.3s%3d %02.2d:%02.2d:%02.2d %d\n"
+	** Since the .2 in 02.2d is ignored, we drop it.
+	*/
+	(void) sprintf(result, "%.3s %.3s%3d %02d:%02d:%02d %d\n",
+		wn, mn,
+		timeptr->tm_mday, timeptr->tm_hour,
+		timeptr->tm_min, timeptr->tm_sec,
+		TM_YEAR_BASE + timeptr->tm_year);
+	return result;
+}

lib/libc/stdtime/difftime.c

@@ -0,0 +1,93 @@
+#line 1 ":src:gno:lib:libc:stdtime:difftime.c"
+/*
+ * $Id: difftime.c,v 1.1 1997/09/21 06:22:10 gdr Exp $
+ *
+ * This file is formatted for tab stops every 8 columns.
+ */
+
+#ifdef __ORCAC__
+segment "libc_stdtm";
+#define NOID
+#define CONST		/* ORCA/C v2.1.1b2 chokes on the const as used here */
+#else
+#define	CONST const
+#endif
+
+#ifndef lint
+#ifndef NOID
+static char	elsieid[] = "@(#)difftime.c	7.4";
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+/*
+** Algorithm courtesy Paul Eggert (eggert@twinsun.com).
+*/
+
+#ifdef HAVE_LONG_DOUBLE
+#define long_double	long double
+#endif /* defined HAVE_LONG_DOUBLE */
+#ifndef HAVE_LONG_DOUBLE
+#define long_double	double
+#endif /* !defined HAVE_LONG_DOUBLE */
+
+double
+#ifdef USE_PROTOS
+difftime(CONST time_t time1, CONST time_t time0)
+#else
+difftime(time1, time0)
+CONST time_t	time1;
+CONST time_t	time0;
+#endif
+{
+	time_t	delta;
+	time_t	hibit;
+
+	if (sizeof(time_t) < sizeof(double))
+		return (double) time1 - (double) time0;
+	if (sizeof(time_t) < sizeof(long_double))
+		return (long_double) time1 - (long_double) time0;
+	if (time1 < time0)
+		return -difftime(time0, time1);
+	/*
+	** As much as possible, avoid loss of precision
+	** by computing the difference before converting to double.
+	*/
+	delta = time1 - time0;
+	if (delta >= 0)
+		return delta;
+	/*
+	** Repair delta overflow.
+	*/
+	hibit = 1;
+	while ((hibit <<= 1) > 0)
+		continue;
+	/*
+	** The following expression rounds twice, which means
+	** the result may not be the closest to the true answer.
+	** For example, suppose time_t is 64-bit signed int,
+	** long_double is IEEE 754 double with default rounding,
+	** time1 = 9223372036854775807 and time0 = -1536.
+	** Then the true difference is 9223372036854777343,
+	** which rounds to 9223372036854777856
+	** with a total error of 513.
+	** But delta overflows to -9223372036854774273,
+	** which rounds to -9223372036854774784, and correcting
+	** this by subtracting 2 * (long_double) hibit
+	** (i.e. by adding 2**64 = 18446744073709551616)
+	** yields 9223372036854776832, which
+	** rounds to 9223372036854775808
+	** with a total error of 1535 instead.
+	** This problem occurs only with very large differences.
+	** It's too painful to fix this portably.
+	** We are not alone in this problem;
+	** many C compilers round twice when converting
+	** large unsigned types to small floating types,
+	** so if time_t is unsigned the "return delta" above
+	** has the same double-rounding problem.
+	*/
+	return delta - 2 * (long_double) hibit;
+}

lib/libc/stdtime/private.h

@@ -0,0 +1,222 @@
+
+
+#ifndef PRIVATE_H
+
+#define PRIVATE_H
+
+/* Stuff moved from Makefile.inc to reduce clutter */
+#ifdef __GNO__
+
+#if 0
+#define TM_GMTOFF	tm_gmtoff
+#define TM_ZONE		tm_zone
+#endif
+#define STD_INSPIRED	1
+#define PCTS		1
+#define HAVE_LONG_DOUBLE 1
+#define TZDIR		"/usr/share/zoneinfo"
+
+#else	/* ! __GNO__ */
+
+#ifndef TM_GMTOFF
+#define TM_GMTOFF	tm_gmtoff
+#define TM_ZONE		tm_zone
+#define STD_INSPIRED	1
+#define PCTS		1
+#define HAVE_LONG_DOUBLE 1
+#define TZDIR		"/usr/share/zoneinfo"
+#endif /* ndef TM_GMTOFF */
+
+#endif	/* ! __GNO__ */
+/*
+** This header is for use ONLY with the time conversion code.
+** There is no guarantee that it will remain unchanged,
+** or that it will remain at all.
+** Do NOT copy it to any system include directory.
+** Thank you!
+*/
+
+/*
+** ID
+*/
+
+#ifndef lint
+#ifndef NOID
+/*static char	privatehid[] = "@(#)private.h	7.33";*/
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+/*
+** Defaults for preprocessor symbols.
+** You can override these in your C compiler options, e.g. `-DHAVE_ADJTIME=0'.
+*/
+
+#ifndef HAVE_ADJTIME
+#define HAVE_ADJTIME		1
+#endif /* !defined HAVE_ADJTIME */
+
+#ifndef HAVE_SETTIMEOFDAY
+#define HAVE_SETTIMEOFDAY	3
+#endif /* !defined HAVE_SETTIMEOFDAY */
+
+#ifndef HAVE_UNISTD_H
+#define HAVE_UNISTD_H		1
+#endif /* !defined HAVE_UNISTD_H */
+
+/*
+** Nested includes
+*/
+
+#include "sys/types.h"	/* for time_t */
+#include "stdio.h"
+#include "ctype.h"
+#include "errno.h"
+#include "string.h"
+#include "limits.h"	/* for CHAR_BIT */
+#include "time.h"
+#include "stdlib.h"
+
+#if HAVE_UNISTD_H - 0
+#include "unistd.h"	/* for F_OK and R_OK */
+#endif /* HAVE_UNISTD_H - 0 */
+
+#if !(HAVE_UNISTD_H - 0)
+#ifndef F_OK
+#define F_OK	0
+#endif /* !defined F_OK */
+#ifndef R_OK
+#define R_OK	4
+#endif /* !defined R_OK */
+#endif /* !(HAVE_UNISTD_H - 0) */
+
+/*
+** Workarounds for compilers/systems.
+*/
+
+/*
+** SunOS 4.1.1 cc lacks const.
+*/
+
+#ifndef const
+#ifndef __STDC__
+#define const
+#endif /* !defined __STDC__ */
+#endif /* !defined const */
+
+/*
+** SunOS 4.1.1 cc lacks prototypes.
+*/
+
+#ifndef P
+#ifdef __STDC__
+#define P(x)	x
+#endif /* defined __STDC__ */
+#ifndef __STDC__
+#define P(x)	()
+#endif /* !defined __STDC__ */
+#endif /* !defined P */
+
+#ifndef USE_PROTOS
+# ifdef __STDC__
+#  define USE_PROTOS
+# endif
+#endif
+
+/*
+** SunOS 4.1.1 headers lack EXIT_SUCCESS.
+*/
+
+#ifndef EXIT_SUCCESS
+#define EXIT_SUCCESS	0
+#endif /* !defined EXIT_SUCCESS */
+
+/*
+** SunOS 4.1.1 headers lack EXIT_FAILURE.
+*/
+
+#ifndef EXIT_FAILURE
+#define EXIT_FAILURE	1
+#endif /* !defined EXIT_FAILURE */
+
+/*
+** SunOS 4.1.1 headers lack FILENAME_MAX.
+*/
+
+#ifndef FILENAME_MAX
+
+#ifndef MAXPATHLEN
+#ifdef unix
+#include "sys/param.h"
+#endif /* defined unix */
+#endif /* !defined MAXPATHLEN */
+
+#ifdef MAXPATHLEN
+#define FILENAME_MAX	MAXPATHLEN
+#endif /* defined MAXPATHLEN */
+#ifndef MAXPATHLEN
+#define FILENAME_MAX	1024		/* Pure guesswork */
+#endif /* !defined MAXPATHLEN */
+
+#endif /* !defined FILENAME_MAX */
+
+/*
+** SunOS 4.1.1 libraries lack remove.
+*/
+
+#ifndef remove
+extern int	unlink P((const char * filename));
+#define remove	unlink
+#endif /* !defined remove */
+
+/*
+** Finally, some convenience items.
+*/
+
+#ifndef TRUE
+#define TRUE	1
+#endif /* !defined TRUE */
+
+#ifndef FALSE
+#define FALSE	0
+#endif /* !defined FALSE */
+
+#ifndef INT_STRLEN_MAXIMUM
+/*
+** 302 / 1000 is log10(2.0) rounded up.
+** Subtract one for the sign bit;
+** add one for integer division truncation;
+** add one more for a minus sign.
+*/
+#define INT_STRLEN_MAXIMUM(type) \
+	((sizeof(type) * CHAR_BIT - 1) * 302 / 1000 + 2)
+#endif /* !defined INT_STRLEN_MAXIMUM */
+
+/*
+** INITIALIZE(x)
+*/
+
+#ifndef GNUC_or_lint
+#ifdef lint
+#define GNUC_or_lint
+#endif /* defined lint */
+#ifndef lint
+#ifdef __GNUC__
+#define GNUC_or_lint
+#endif /* defined __GNUC__ */
+#endif /* !defined lint */
+#endif /* !defined GNUC_or_lint */
+
+#ifndef INITIALIZE
+#ifdef GNUC_or_lint
+#define INITIALIZE(x)	((x) = 0)
+#endif /* defined GNUC_or_lint */
+#ifndef GNUC_or_lint
+#define INITIALIZE(x)
+#endif /* !defined GNUC_or_lint */
+#endif /* !defined INITIALIZE */
+
+/*
+** UNIX was a registered trademark of UNIX System Laboratories in 1993.
+*/
+
+#endif /* !defined PRIVATE_H */

lib/libc/stdtime/strftime.c

@@ -0,0 +1,612 @@
+/*
+ * 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.
+ *
+ * $Id: strftime.c,v 1.1 1997/09/21 06:22:10 gdr Exp $
+ *
+ * This file is formatted for tab stops every 8 columns.
+ */
+
+#ifdef __ORCAC__
+segment "libc_stdtm";
+#define NOID
+#endif
+
+#ifdef LIBC_RCS
+static const char rcsid[] =
+	"$Id: strftime.c,v 1.1 1997/09/21 06:22:10 gdr Exp $";
+#endif
+
+#ifndef lint
+#ifndef NOID
+static const char	elsieid[] = "@(#)strftime.c	7.38";
+/*
+** 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 "private.h"
+
+#ifndef LIBC_SCCS
+#ifndef lint
+static const char	sccsid[] = "@(#)strftime.c	5.4 (Berkeley) 3/14/89";
+#endif /* !defined lint */
+#endif /* !defined LIBC_SCCS */
+
+#include "tzfile.h"
+#include <fcntl.h>
+#include <locale.h>
+#include <rune.h>		/* for _PATH_LOCALE */
+#include <sys/stat.h>
+
+#define LOCALE_HOME _PATH_LOCALE
+
+struct lc_time_T {
+	const char *	mon[12];
+	const char *	month[12];
+	const char *	wday[7];
+	const char *	weekday[7];
+	const char *	X_fmt;
+	const char *	x_fmt;
+	const char *	c_fmt;
+	const char *	am;
+	const char *	pm;
+	const char *	date_fmt;
+};
+
+static struct lc_time_T		localebuf;
+static struct lc_time_T *	_loc P((void));
+static int using_locale;
+
+#define Locale	(using_locale ? &localebuf : &C_time_locale)
+
+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
+	** Since the C language standard calls for
+	** "date, using locale's date format," anything goes.
+	** Using just numbers (as here) makes Quakers happier;
+	** it's also compatible with SVR4.
+	*/
+	"%m/%d/%y",
+
+	/*
+	** c_fmt (ctime-compatible)
+	** Note that
+	**	"%a %b %d %H:%M:%S %Y"
+	** is used by Solaris 2.3.
+	*/
+	"%a %b %e %X %Y",
+
+	/* am */
+	"AM",
+
+	/* pm */
+	"PM",
+
+	/* date_fmt */
+	"%a %b %e %X %Z %Y"
+};
+
+static char *	_add P((const char *, char *, const char *));
+static char *	_conv P((int, const char *, char *, const char *));
+static char *	_fmt P((const char *, const struct tm *, char *, const char *));
+static char *   _secs P((const struct tm *, char *, const char *));
+
+size_t strftime P((char *, size_t, const char *, const struct tm *));
+
+extern char *	tzname[];
+
+size_t
+#ifdef USE_PROTOS
+strftime(char *const s, const size_t maxsize, const char *const format,
+	const struct tm *const t)
+#else
+strftime(s, maxsize, format, t)
+	char *const s;
+	const size_t maxsize;
+	const char *const format;
+	const struct tm *const t;
+#endif
+{
+	char *p;
+
+	tzset();
+	p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize);
+	if (p == s + maxsize)
+		return 0;
+	*p = '\0';
+	return p - s;
+}
+
+static char *
+#ifdef USE_PROTOS
+_fmt(const char *format, const struct tm *const t, char *pt,
+	const char *const ptlim)
+#else
+_fmt(format, t, pt, ptlim)
+	const char *format;
+	const struct tm *const t;
+	char *pt;
+	const char *const ptlim;
+#endif
+{
+	for ( ; *format; ++format) {
+		if (*format == '%') {
+label:
+			switch (*++format) {
+			case '\0':
+				--format;
+				break;
+			case 'A':
+				pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+					"?" : Locale->weekday[t->tm_wday],
+					pt, ptlim);
+				continue;
+			case 'a':
+				pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+					"?" : Locale->wday[t->tm_wday],
+					pt, ptlim);
+				continue;
+			case 'B':
+				pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
+					"?" : Locale->month[t->tm_mon],
+					pt, ptlim);
+				continue;
+			case 'b':
+			case 'h':
+				pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
+					"?" : Locale->mon[t->tm_mon],
+					pt, ptlim);
+				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, 5/24/93)
+				*/
+				pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
+					"%02d", pt, ptlim);
+				continue;
+			case 'c':
+				pt = _fmt(Locale->c_fmt, t, pt, ptlim);
+				continue;
+			case 'D':
+				pt = _fmt("%m/%d/%y", t, pt, ptlim);
+				continue;
+			case 'd':
+				pt = _conv(t->tm_mday, "%02d", pt, ptlim);
+				continue;
+			case 'E':
+			case 'O':
+				/*
+				** POSIX locale extensions, a la
+				** Arnold Robbins' strftime version 3.0.
+				** The sequences
+				**	%Ec %EC %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)
+				*/
+				goto label;
+			case 'e':
+				pt = _conv(t->tm_mday, "%2d", pt, ptlim);
+				continue;
+			case 'H':
+				pt = _conv(t->tm_hour, "%02d", pt, ptlim);
+				continue;
+			case 'I':
+				pt = _conv((t->tm_hour % 12) ?
+					(t->tm_hour % 12) : 12,
+					"%02d", pt, ptlim);
+				continue;
+			case 'j':
+				pt = _conv(t->tm_yday + 1, "%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, 5/24/93)
+				*/
+				pt = _conv(t->tm_hour, "%2d", 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, 5/24/93)
+				*/
+				pt = _conv((t->tm_hour % 12) ?
+					(t->tm_hour % 12) : 12,
+					"%2d", pt, ptlim);
+				continue;
+			case 'M':
+				pt = _conv(t->tm_min, "%02d", pt, ptlim);
+				continue;
+			case 'm':
+				pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
+				continue;
+			case 'n':
+				pt = _add("\n", pt, ptlim);
+				continue;
+			case 'p':
+				pt = _add((t->tm_hour >= 12) ?
+					Locale->pm :
+					Locale->am,
+					pt, ptlim);
+				continue;
+			case 'R':
+				pt = _fmt("%H:%M", t, pt, ptlim);
+				continue;
+			case 'r':
+				pt = _fmt("%I:%M:%S %p", t, pt, ptlim);
+				continue;
+			case 'S':
+				pt = _conv(t->tm_sec, "%02d", pt, ptlim);
+				continue;
+			case 's':
+				pt = _secs(t, pt, ptlim);
+				continue;
+			case 'T':
+				pt = _fmt("%H:%M:%S", t, pt, ptlim);
+				continue;
+			case 't':
+				pt = _add("\t", pt, ptlim);
+				continue;
+			case 'U':
+				pt = _conv((t->tm_yday + 7 - t->tm_wday) / 7,
+					"%02d", pt, ptlim);
+				continue;
+			case 'u':
+				/*
+				** From Arnold Robbins' strftime version 3.0:
+				** "ISO 8601: Weekday as a decimal number
+				** [1 (Monday) - 7]"
+				** (ado, 5/24/93)
+				*/
+				pt = _conv((t->tm_wday == 0) ? 7 : t->tm_wday,
+					"%d", pt, ptlim);
+				continue;
+			case 'V':
+				/*
+				** 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).  The method for
+				** determining the week number is as specified
+				** by ISO 8601 (to wit: if the week containing
+				** January 1 has four or more days in the new
+				** year, then it is week 1, otherwise it is
+				** week 53 of the previous year and the next
+				** week is week 1)."
+				** (ado, 5/24/93)
+				*/
+				/*
+				** XXX--If January 1 falls on a Friday,
+				** January 1-3 are part of week 53 of the
+				** previous year.  By analogy, if January
+				** 1 falls on a Thursday, are December 29-31
+				** of the PREVIOUS year part of week 1???
+				** (ado 5/24/93)
+				*/
+				/*
+				** You are understood not to expect this.
+				*/
+				{
+					int	i;
+
+					i = (t->tm_yday + 10 - (t->tm_wday ?
+						(t->tm_wday - 1) : 6)) / 7;
+					if (i == 0) {
+						/*
+						** What day of the week does
+						** January 1 fall on?
+						*/
+						i = t->tm_wday -
+							(t->tm_yday - 1);
+						/*
+						** Fri Jan 1: 53
+						** Sun Jan 1: 52
+						** Sat Jan 1: 53 if previous
+						**		 year a leap
+						**		 year, else 52
+						*/
+						if (i == TM_FRIDAY)
+							i = 53;
+						else if (i == TM_SUNDAY)
+							i = 52;
+						else	i = isleap(t->tm_year +
+								TM_YEAR_BASE) ?
+								53 : 52;
+#ifdef XPG4_1994_04_09
+						/*
+						** As of 4/9/94, though,
+						** XPG4 calls for 53
+						** unconditionally.
+						*/
+						i = 53;
+#endif /* defined XPG4_1994_04_09 */
+					}
+					pt = _conv(i, "%02d", pt, ptlim);
+				}
+				continue;
+			case 'v':
+				/*
+				** From Arnold Robbins' strftime version 3.0:
+				** "date as dd-bbb-YYYY"
+				** (ado, 5/24/93)
+				*/
+				pt = _fmt("%e-%b-%Y", t, pt, ptlim);
+				continue;
+			case 'W':
+				pt = _conv((t->tm_yday + 7 -
+					(t->tm_wday ?
+					(t->tm_wday - 1) : 6)) / 7,
+					"%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);
+				continue;
+			case 'x':
+				pt = _fmt(Locale->x_fmt, t, pt, ptlim);
+				continue;
+			case 'y':
+				pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
+					"%02d", pt, ptlim);
+				continue;
+			case 'Y':
+				pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
+					pt, ptlim);
+				continue;
+			case 'Z':
+				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],
+						pt, ptlim);
+				} else  pt = _add("?", pt, ptlim);
+				continue;
+			case '+':
+				pt = _fmt(Locale->date_fmt, t, pt, ptlim);
+				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 *
+#ifdef USE_PROTOS
+_conv(const int n, const char *const format, char *const pt,
+	const char *const ptlim)
+#else
+_conv(n, format, pt, ptlim)
+	const int n;
+	const char *const format;
+	char *const pt;
+	const char *const ptlim;
+#endif
+{
+	char	buf[INT_STRLEN_MAXIMUM(int) + 1];
+
+	(void) sprintf(buf, format, n);
+	return _add(buf, pt, ptlim);
+}
+
+static char *
+#ifdef USE_PROTOS
+_secs(const struct tm *t, char *pt, const char *ptlim)
+#else
+_secs(t, pt, ptlim)
+	const struct tm *t;
+	char *pt;
+	const char *ptlim;
+#endif
+{
+	char    buf[INT_STRLEN_MAXIMUM(int) + 1];
+	register time_t s;
+	struct tm tmp;
+
+	/* Make a copy, mktime(3) modifies the tm struct. */
+	tmp = *t;
+	s = mktime(&tmp);
+	(void) sprintf(buf, "%ld", s);
+	return _add(buf, pt, ptlim);
+}
+  
+static char *
+#ifdef USE_PROTOS
+_add(const char *str, char *pt, const char *const ptlim)
+#else
+_add(str, pt, ptlim)
+	const char *str;
+	char *pt;
+	const char *const ptlim;
+#endif
+{
+	while (pt < ptlim && (*pt = *str++) != '\0')
+		++pt;
+	return pt;
+}
+
+extern char *_PathLocale;
+
+int
+#ifdef USE_PROTOS
+__time_load_locale(const char *name)
+#else
+__time_load_locale(name)
+	const char *name;
+#endif
+{
+	static const char	lc_time[] = "LC_TIME";
+	static char *		locale_buf;
+	static char		locale_buf_C[] = "C";
+
+	int			fd;
+	char *			lbuf;
+	char *			p;
+	const char **		ap;
+	const char *		plim;
+#ifdef __ORCAC__
+	static
+#endif
+	char			filename[FILENAME_MAX];
+	struct stat		st;
+	size_t			namesize;
+	size_t			bufsize;
+
+	using_locale = 0;
+
+	if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
+		return 0;
+
+	if (name == NULL || *name == '\0') {
+		goto no_locale;
+	}
+	/*
+	** If the locale name is the same as our cache, use the cache.
+	*/
+	lbuf = locale_buf;
+	if (lbuf != NULL && strcmp(name, lbuf) == 0) {
+		p = lbuf;
+		for (ap = (const char **) &localebuf;
+			ap < (const char **) (&localebuf + 1);
+				++ap)
+					*ap = p += strlen(p) + 1;
+		using_locale = 1;
+		return 0;
+	}
+	/*
+	** Slurp the locale file into the cache.
+	*/
+	namesize = strlen(name) + 1;
+
+	snprintf(filename, sizeof filename, 
+		 "%s/%s/%s",
+		 _PathLocale, name, lc_time);
+	fd = open(filename, O_RDONLY);
+	if (fd < 0) {
+		goto no_locale;
+	}
+	if (fstat(fd, &st) != 0)
+		goto bad_locale;
+	if (st.st_size <= 0)
+		goto bad_locale;
+	bufsize = namesize + st.st_size;
+	locale_buf = NULL;
+	lbuf = (lbuf == NULL || lbuf == locale_buf_C) ?
+		malloc(bufsize) : realloc(lbuf, bufsize);
+	if (lbuf == NULL)
+		goto bad_locale;
+	(void) strcpy(lbuf, name);
+	p = lbuf + namesize;
+	plim = p + st.st_size;
+	if (read(fd, p, (size_t) st.st_size) != st.st_size)
+		goto bad_lbuf;
+	if (close(fd) != 0)
+		goto bad_lbuf;
+	/*
+	** Parse the locale file into localebuf.
+	*/
+	if (plim[-1] != '\n')
+		goto bad_lbuf;
+	for (ap = (const char **) &localebuf;
+		ap < (const char **) (&localebuf + 1);
+			++ap) {
+				if (p == plim)
+					goto bad_lbuf;
+				*ap = p;
+				while (*p != '\n')
+					++p;
+				*p++ = '\0';
+	}
+	/*
+	** Record the successful parse in the cache.
+	*/
+	locale_buf = lbuf;
+
+	using_locale = 1;
+	return 0;
+
+bad_lbuf:
+	free(lbuf);
+bad_locale:
+	(void) close(fd);
+no_locale:
+	/*
+	 * XXX - This may not be the correct thing to do in this case.
+	 * setlocale() assumes that we left the old locale alone.
+	 */
+	locale_buf = locale_buf_C;
+	localebuf = C_time_locale;
+	return -1;
+}

lib/libc/stdtime/tzfile.h

@@ -0,0 +1,182 @@
+
+
+#ifndef TZFILE_H
+
+#define TZFILE_H
+
+/*
+** This header is for use ONLY with the time conversion code.
+** There is no guarantee that it will remain unchanged,
+** or that it will remain at all.
+** Do NOT copy it to any system include directory.
+** Thank you!
+*/
+
+/*
+** ID
+*/
+
+#ifndef lint
+#ifndef NOID
+/*static char	tzfilehid[] = "@(#)tzfile.h	7.6";*/
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+/*
+** Information about time zone files.
+*/
+
+#ifndef TZDIR
+#define TZDIR	"/usr/share/zoneinfo" /* Time zone object file directory */
+#endif /* !defined TZDIR */
+
+#ifndef TZDEFAULT
+#define TZDEFAULT	"/etc/localtime"
+#endif /* !defined TZDEFAULT */
+
+#ifndef TZDEFRULES
+#define TZDEFRULES	"posixrules"
+#endif /* !defined TZDEFRULES */
+
+/*
+** Each file begins with. . .
+*/
+
+struct tzhead {
+	char	tzh_reserved[20];	/* reserved for future use */
+	char	tzh_ttisgmtcnt[4];	/* coded number of trans. time flags */
+	char	tzh_ttisstdcnt[4];	/* coded number of trans. time flags */
+	char	tzh_leapcnt[4];		/* coded number of leap seconds */
+	char	tzh_timecnt[4];		/* coded number of transition times */
+	char	tzh_typecnt[4];		/* coded number of local time types */
+	char	tzh_charcnt[4];		/* coded number of abbr. chars */
+};
+
+/*
+** . . .followed by. . .
+**
+**	tzh_timecnt (char [4])s		coded transition times a la time(2)
+**	tzh_timecnt (unsigned char)s	types of local time starting at above
+**	tzh_typecnt repetitions of
+**		one (char [4])		coded GMT offset in seconds
+**		one (unsigned char)	used to set tm_isdst
+**		one (unsigned char)	that's an abbreviation list index
+**	tzh_charcnt (char)s		'\0'-terminated zone abbreviations
+**	tzh_leapcnt repetitions of
+**		one (char [4])		coded leap second transition times
+**		one (char [4])		total correction after above
+**	tzh_ttisstdcnt (char)s		indexed by type; if TRUE, transition
+**					time is standard time, if FALSE,
+**					transition time is wall clock time
+**					if absent, transition times are
+**					assumed to be wall clock time
+**	tzh_ttisgmtcnt (char)s		indexed by type; if TRUE, transition
+**					time is GMT, if FALSE,
+**					transition time is local time
+**					if absent, transition times are
+**					assumed to be local time
+*/
+
+/*
+** In the current implementation, "tzset()" refuses to deal with files that
+** exceed any of the limits below.
+*/
+
+#ifndef TZ_MAX_TIMES
+/*
+** The TZ_MAX_TIMES value below is enough to handle a bit more than a
+** year's worth of solar time (corrected daily to the nearest second) or
+** 138 years of Pacific Presidential Election time
+** (where there are three time zone transitions every fourth year).
+*/
+#define TZ_MAX_TIMES	370
+#endif /* !defined TZ_MAX_TIMES */
+
+#ifndef TZ_MAX_TYPES
+#ifndef NOSOLAR
+#define TZ_MAX_TYPES	256 /* Limited by what (unsigned char)'s can hold */
+#endif /* !defined NOSOLAR */
+#ifdef NOSOLAR
+/*
+** Must be at least 14 for Europe/Riga as of Jan 12 1995,
+** as noted by Earl Chew <earl@hpato.aus.hp.com>.
+*/
+#define TZ_MAX_TYPES	20	/* Maximum number of local time types */
+#endif /* !defined NOSOLAR */
+#endif /* !defined TZ_MAX_TYPES */
+
+#ifndef TZ_MAX_CHARS
+#define TZ_MAX_CHARS	50	/* Maximum number of abbreviation characters */
+				/* (limited by what unsigned chars can hold) */
+#endif /* !defined TZ_MAX_CHARS */
+
+#ifndef TZ_MAX_LEAPS
+#define TZ_MAX_LEAPS	50	/* Maximum number of leap second corrections */
+#endif /* !defined TZ_MAX_LEAPS */
+
+#define SECSPERMIN	60
+#define MINSPERHOUR	60
+#define HOURSPERDAY	24
+#define DAYSPERWEEK	7
+#define DAYSPERNYEAR	365
+#define DAYSPERLYEAR	366
+#define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
+#define SECSPERDAY	((long) SECSPERHOUR * HOURSPERDAY)
+#define MONSPERYEAR	12
+
+#define TM_SUNDAY	0
+#define TM_MONDAY	1
+#define TM_TUESDAY	2
+#define TM_WEDNESDAY	3
+#define TM_THURSDAY	4
+#define TM_FRIDAY	5
+#define TM_SATURDAY	6
+
+#define TM_JANUARY	0
+#define TM_FEBRUARY	1
+#define TM_MARCH	2
+#define TM_APRIL	3
+#define TM_MAY		4
+#define TM_JUNE		5
+#define TM_JULY		6
+#define TM_AUGUST	7
+#define TM_SEPTEMBER	8
+#define TM_OCTOBER	9
+#define TM_NOVEMBER	10
+#define TM_DECEMBER	11
+
+#define TM_YEAR_BASE	1900
+
+#define EPOCH_YEAR	1970
+#define EPOCH_WDAY	TM_THURSDAY
+
+/*
+** Accurate only for the past couple of centuries;
+** that will probably do.
+*/
+
+#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
+
+#ifndef USG
+
+/*
+** Use of the underscored variants may cause problems if you move your code to
+** certain System-V-based systems; for maximum portability, use the
+** underscore-free variants.  The underscored variants are provided for
+** backward compatibility only; they may disappear from future versions of
+** this file.
+*/
+
+#define SECS_PER_MIN	SECSPERMIN
+#define MINS_PER_HOUR	MINSPERHOUR
+#define HOURS_PER_DAY	HOURSPERDAY
+#define DAYS_PER_WEEK	DAYSPERWEEK
+#define DAYS_PER_NYEAR	DAYSPERNYEAR
+#define DAYS_PER_LYEAR	DAYSPERLYEAR
+#define SECS_PER_HOUR	SECSPERHOUR
+#define SECS_PER_DAY	SECSPERDAY
+#define MONS_PER_YEAR	MONSPERYEAR
+
+#endif /* !defined USG */
+
+#endif /* !defined TZFILE_H */