1 files changed, 81 insertions, 0 deletions
diff --git a/src/common/timer.c b/src/common/timer.c
new file mode 100644
index 0000000..cc34249
--- /dev/null
+++ b/src/common/timer.c
@@ -0,0 +1,81 @@
+/* $Id: timer.c 2423 2010-03-13 07:09:49Z aturner $ */
+
+/*
+ * Copyright (c) 2001-2010 Aaron Turner.
+ * 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 names of the copyright owners 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 ``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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#include "config.h"
+#include "defines.h"
+#include "common.h"
+
+#include "timer.h"
+
+#include <stdlib.h>
+
+/* Miscellaneous timeval routines */
+
+/**
+ * Divide tvp by div, storing the result in tvp 
+ */
+void
+timerdiv(struct timeval *tvp, float div)
+{
+    double interval;
+
+    if (div == 0 || div == 1)
+        return;
+
+    interval = ((double)tvp->tv_sec * 1000000 + tvp->tv_usec) / (double)div;
+    tvp->tv_sec = interval / (int)1000000;
+    tvp->tv_usec = interval - (tvp->tv_sec * 1000000);
+}
+
+/* Divide tvs by div, storing the result in tvs */
+void timesdiv(struct timespec *tvs, float div)
+{
+    double interval;
+    
+    if (div == 0 || div == 1)
+        return;
+        
+    interval = ((double)tvs->tv_sec * 1000000000 + tvs->tv_nsec) / (double)div;
+    tvs->tv_sec = interval / (int)1000000000;
+    tvs->tv_nsec = interval - (tvs->tv_sec * 1000000000);
+}
+
+void
+init_delta_time(delta_t *ctx)
+{
+#ifdef HAVE_ABSOLUTE_TIME
+    SetZero(*ctx);
+#else
+    timerclear(ctx);
+#endif 
+}
+