lib9: add ctime

ctime differs across Unix vs Plan 9 so add to portability library

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/5363043

2 files changed, 29 insertions, 0 deletions

diff --git a/src/lib9/Makefile b/src/lib9/Makefile
index 28c97c9b4..31f22c41e 100644
--- a/src/lib9/Makefile
+++ b/src/lib9/Makefile
@@ -57,6 +57,7 @@ LIB9OFILES=\
 	atoi.$O\
 	cleanname.$O\
 	create.$O\
+	ctime.$O\
 	dirfstat.$O\
 	dirfwstat.$O\
 	dirstat.$O\
diff --git a/src/lib9/ctime.c b/src/lib9/ctime.c
new file mode 100644
index 000000000..d4ab6b21a
--- /dev/null
+++ b/src/lib9/ctime.c
@@ -0,0 +1,28 @@
+// Copyright 2011 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#define NOPLAN9DEFINES
+#include <u.h>
+#include <libc.h>
+
+char*
+p9ctime(long t)
+{
+	static char buf[100];
+	time_t tt;
+	struct tm *tm;
+	
+	tt = t;
+	tm = localtime(&tt);
+	snprint(buf, sizeof buf, "%3.3s %3.3s %02d %02d:%02d:%02d %3.3s %d\n",
+		"SunMonTueWedThuFriSat"+(tm->tm_wday*3),
+		"JanFebMarAprMayJunJulAugSepOctNovDec"+(tm->tm_mon*3),
+		tm->tm_mday,
+		tm->tm_hour,
+		tm->tm_min,
+		tm->tm_sec,
+		tm->tm_zone,
+		tm->tm_year + 1900);
+	return buf;
+}