r16017: Add Samba4 replacement for timegm to work

on Solaris.
Jeremy.
(This used to be commit b65c6468651282879a39fa8029c190f2d1a91a28)

2 files changed, 71 insertions, 24 deletions

diff --git a/source3/lib/replace.c b/source3/lib/replace.c
index 120fd3a468..9ef3503d39 100644
--- a/source3/lib/replace.c
+++ b/source3/lib/replace.c
@@ -434,27 +434,3 @@ char *rep_inet_ntoa(struct in_addr ip)
 }
 #endif /* HAVE_SYSLOG */
 #endif /* HAVE_VSYSLOG */
-
-
-#ifndef HAVE_TIMEGM
-/*
-  yes, I know this looks insane, but its really needed. The function in the 
-  Linux timegm() manpage does not work on solaris.
-*/
- time_t timegm(struct tm *tm) 
-{
-	struct tm tm2, tm3;
-	time_t t;
-
-	tm2 = *tm;
-
-	t = mktime(&tm2);
-	tm3 = *localtime(&t);
-	tm2 = *tm;
-	tm2.tm_isdst = tm3.tm_isdst;
-	t = mktime(&tm2);
-	t -= get_time_zone(t);
-
-	return t;
-}
-#endif
diff --git a/source3/lib/timegm.c b/source3/lib/timegm.c
new file mode 100644
index 0000000000..0e42a863d3
--- /dev/null
+++ b/source3/lib/timegm.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 1997 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+/*
+  adapted for Samba4 by Andrew Tridgell
+*/
+
+#include "includes.h"
+
+#ifndef HAVE_TIMEGM
+
+static int is_leap(unsigned y)
+{
+	y += 1900;
+	return (y % 4) == 0 && ((y % 100) != 0 || (y % 400) == 0);
+}
+
+time_t timegm(struct tm *tm)
+{
+	static const unsigned ndays[2][12] ={
+		{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
+		{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}};
+	time_t res = 0;
+	unsigned i;
+	
+	for (i = 70; i < tm->tm_year; ++i)
+		res += is_leap(i) ? 366 : 365;
+	
+	for (i = 0; i < tm->tm_mon; ++i)
+		res += ndays[is_leap(tm->tm_year)][i];
+	res += tm->tm_mday - 1;
+	res *= 24;
+	res += tm->tm_hour;
+	res *= 60;
+	res += tm->tm_min;
+	res *= 60;
+	res += tm->tm_sec;
+	return res;
+}
+
+#endif /* HAVE_TIMEGM */