From 7f22b32e6359bb1381fc2336b9ec876036eb72a6 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@gmx.de>
Date: Sat, 1 Sep 2012 14:12:29 +0200
Subject: [PATCH] isodate in libc? revert every commit for great justice!

---
 sys/include/libc.h        |  2 --
 sys/man/1/date            |  6 -----
 sys/man/2/ctime           | 15 +------------
 sys/src/cmd/date.c        | 25 +++++++--------------
 sys/src/libc/9sys/ctime.c | 47 ---------------------------------------
 5 files changed, 9 insertions(+), 86 deletions(-)

diff --git a/sys/include/libc.h b/sys/include/libc.h
index a16ab4ef4..833a3f50b 100644
--- a/sys/include/libc.h
+++ b/sys/include/libc.h
@@ -328,8 +328,6 @@ extern	double	cputime(void);
 extern	long	times(long*);
 extern	long	tm2sec(Tm*);
 extern	vlong	nsec(void);
-extern	char*	isotime(Tm*);
-extern	char*	isodate(Tm*);
 
 extern	void	cycles(uvlong*);	/* 64-bit value of the cycle counter if there is one, 0 if there isn't */
 
diff --git a/sys/man/1/date b/sys/man/1/date
index b49d65192..705a95425 100644
--- a/sys/man/1/date
+++ b/sys/man/1/date
@@ -24,12 +24,6 @@ Report Greenwich Mean Time (GMT) rather than local time.
 .B -n
 Report the date as the number of seconds since the
 epoch, 00:00:00 GMT, January 1, 1970.
-.TP
-.B -i
-Report the date as ISO-8601 without time and timezone suffix.
-.TP
-.B -t
-Report the date as ISO-8601 with time and timezone suffix.
 .PP
 The conversion from Greenwich Mean Time to local time depends on the
 .B $timezone
diff --git a/sys/man/2/ctime b/sys/man/2/ctime
index 411f2cd65..a4e074343 100644
--- a/sys/man/2/ctime
+++ b/sys/man/2/ctime
@@ -1,6 +1,6 @@
 .TH CTIME 2
 .SH NAME
-ctime, localtime, gmtime, asctime, tm2sec, timezone, isodate, isotime \- convert date and time
+ctime, localtime, gmtime, asctime, tm2sec, timezone \- convert date and time
 .SH SYNOPSIS
 .B #include <u.h>
 .br
@@ -23,12 +23,6 @@ char*	asctime(Tm *tm)
 long	tm2sec(Tm *tm)
 .PP
 .B
-char*	isodate(Tm *tm)
-.PP
-.B
-char*	isotime(Tm *tm)
-.PP
-.B
 /env/timezone
 .SH DESCRIPTION
 .I Ctime
@@ -90,13 +84,6 @@ if
 is not
 .BR GMT .
 .PP
-.I Isotime 
-converts a broken-down time to a date and timestamp according to ISO-8601 with timezone, and returns a string of up to 24 characters.
-.PP
-.I Isodate 
-converts a broken-down time to a datestamp 
-without timezone, and returns a 10 byte string.
-.PP
 When local time is first requested,
 the program consults the
 .B timezone
diff --git a/sys/src/cmd/date.c b/sys/src/cmd/date.c
index 9d6504b3f..fc2ec5af5 100644
--- a/sys/src/cmd/date.c
+++ b/sys/src/cmd/date.c
@@ -1,19 +1,17 @@
 #include <u.h>
 #include <libc.h>
 
-int uflg, nflg, iflg, tflg;
+int uflg, nflg;
 
 void
 main(int argc, char *argv[])
 {
 	ulong now;
-	Tm *tm;
+
 	ARGBEGIN{
 	case 'n':	nflg = 1; break;
 	case 'u':	uflg = 1; break;
-	case 't':	tflg = 1; /* implies -i */
-	case 'i':	iflg = 1; break;
-	default:	fprint(2, "usage: date [-itun] [seconds]\n"); exits("usage");
+	default:	fprint(2, "usage: date [-un] [seconds]\n"); exits("usage");
 	}ARGEND
 
 	if(argc == 1)
@@ -23,17 +21,10 @@ main(int argc, char *argv[])
 
 	if(nflg)
 		print("%ld\n", now);
-	else if(iflg) {
-		tm = uflg ? gmtime(now) : localtime(now);
-		if(tflg)
-			print("%s\n", isotime(tm));
-		else
-			print("%s\n", isodate(tm));
-	} else {
-		if(uflg)
-			print("%s", asctime(gmtime(now)));
-		else
-			print("%s", ctime(now));
-	}
+	else if(uflg)
+		print("%s", asctime(gmtime(now)));
+	else
+		print("%s", ctime(now));
+	
 	exits(0);
 }
diff --git a/sys/src/libc/9sys/ctime.c b/sys/src/libc/9sys/ctime.c
index a99727225..11340ea41 100644
--- a/sys/src/libc/9sys/ctime.c
+++ b/sys/src/libc/9sys/ctime.c
@@ -299,50 +299,3 @@ rd_long(char **f, long *p)
 	*p = l;
 	return 0;
 }
-
-char*
-isodate(Tm *t)
-{
-	static char c[10+14+1]; /* leave room to append isotime */
-
-	ct_numb(c, t->year / 100 + 119);
-	ct_numb(c+2, t->year % 100 + 100);
-	c[4] = '-';
-	ct_numb(c+5, t->mon + 101);
-	c[7] = '-';
-	ct_numb(c+8, t->mday + 100);
-	c[10] = 0;
-	return c;
-}
-
-char*
-isotime(Tm *t)
-{
-	int tz;
-	char *c, *d;
-	d = isodate(t);
-	c = d + 10; /* append to isodate */
-	c[0] = 'T';
-	ct_numb(c+1, t->hour+100);
-	c[3] = ':';
-	ct_numb(c+4, t->min+100);
-	c[6] = ':';
-	ct_numb(c+7, t->sec+100);
-	tz = t->tzoff / 60;
-	if(t->tzoff) {
-		/* localtime */
-		if (t->tzoff > 0) {
-			c[9] = '+';
-		} else {
-			c[9] = '-';
-			tz = -tz;
-		}
-		ct_numb(c+10, tz / 60 + 100);
-		ct_numb(c+12, tz % 60 + 100);
-		c[14] = 0;
-	} else {
-		c[9] = 'Z';
-		c[10] = 0;
-	}
-	return d;
-}