summaryrefslogtreecommitdiff
path: root/replace/timegm.c
diff options
context:
space:
mode:
Diffstat (limited to 'replace/timegm.c')
-rw-r--r--replace/timegm.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/replace/timegm.c b/replace/timegm.c
new file mode 100644
index 0000000000..395c684e11
--- /dev/null
+++ b/replace/timegm.c
@@ -0,0 +1,78 @@
+/*
+ * 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 "replace.h"
+#include "system/time.h"
+
+static int is_leap(unsigned y)
+{
+ y += 1900;
+ return (y % 4) == 0 && ((y % 100) != 0 || (y % 400) == 0);
+}
+
+time_t rep_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;
+
+ if (tm->tm_mon > 12 ||
+ tm->tm_mon < 0 ||
+ tm->tm_mday > 31 ||
+ tm->tm_min > 60 ||
+ tm->tm_sec > 60 ||
+ tm->tm_hour > 24) {
+ /* invalid tm structure */
+ return 0;
+ }
+
+ 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;
+}