From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001
From: Taru Karttunen <taruti@taruti.net>
Date: Wed, 30 Mar 2011 15:46:40 +0300
Subject: Import sources from 2011-03-30 iso image

---
 sys/src/cmd/cwfs/time.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100755 sys/src/cmd/cwfs/time.c

(limited to 'sys/src/cmd/cwfs/time.c')

diff --git a/sys/src/cmd/cwfs/time.c b/sys/src/cmd/cwfs/time.c
new file mode 100755
index 000000000..ad7f7ddec
--- /dev/null
+++ b/sys/src/cmd/cwfs/time.c
@@ -0,0 +1,117 @@
+#include "all.h"
+
+Timet
+toytime(void)
+{
+	return time(nil);
+}
+
+void
+datestr(char *s, Timet t)
+{
+	Tm *tm;
+
+	tm = localtime(t);
+	sprint(s, "%.4d%.2d%.2d", tm->year+1900, tm->mon+1, tm->mday);
+}
+
+void
+prdate(void)
+{
+	print("%T\n", time(nil));
+}
+
+static void
+ct_numb(char *cp, int n)
+{
+	if(n >= 10)
+		cp[0] = (n/10)%10 + '0';
+	else
+		cp[0] = ' ';
+	cp[1] = n%10 + '0';
+}
+
+int
+Tfmt(Fmt* fmt)
+{
+	char s[30];
+	char *cp;
+	Timet t;
+	Tm *tm;
+
+	t = va_arg(fmt->args, Timet);
+	if(t == 0)
+		return fmtstrcpy(fmt, "The Epoch");
+
+	tm = localtime(t);
+	strcpy(s, "Day Mon 00 00:00:00 1900");
+	cp = &"SunMonTueWedThuFriSat"[tm->wday*3];
+	s[0] = cp[0];
+	s[1] = cp[1];
+	s[2] = cp[2];
+	cp = &"JanFebMarAprMayJunJulAugSepOctNovDec"[tm->mon*3];
+	s[4] = cp[0];
+	s[5] = cp[1];
+	s[6] = cp[2];
+	ct_numb(s+8, tm->mday);
+	ct_numb(s+11, tm->hour+100);
+	ct_numb(s+14, tm->min+100);
+	ct_numb(s+17, tm->sec+100);
+	if(tm->year >= 100) {
+		s[20] = '2';
+		s[21] = '0';
+	}
+	ct_numb(s+22, tm->year+100);
+
+	return fmtstrcpy(fmt, s);
+}
+
+/*
+ * compute the next time after t
+ * that has hour hr and is not on
+ * day in bitpattern --
+ * for automatic dumps
+ */
+Timet
+nextime(Timet t, int hr, int day)
+{
+	int nhr;
+	Tm *tm;
+
+	if(hr < 0 || hr >= 24)
+		hr = 5;
+	if((day&0x7f) == 0x7f)
+		day = 0;
+	for (;;) {
+		tm = localtime(t);
+		t -= tm->sec;
+		t -= tm->min*60;
+		nhr = tm->hour;
+		do {
+			t += 60*60;
+			nhr++;
+		} while(nhr%24 != hr);
+		tm = localtime(t);
+		if(tm->hour != hr) {
+			t += 60*60;
+			tm = localtime(t);
+			if(tm->hour != hr) {
+				t -= 60*60;
+				tm = localtime(t);
+			}
+		}
+		if(day & (1<<tm->wday))
+			t += 12*60*60;
+		else
+			return t;
+	}
+}
+
+/*
+ *  delay for l milliseconds more or less.
+ */
+void
+delay(int l)
+{
+	sleep(l);
+}
-- 
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