1 files changed, 52 insertions, 0 deletions
diff --git a/src/timer/timer_base/timers.cpp b/src/timer/timer_base/timers.cpp
new file mode 100644
index 000000000..4f482916f
--- /dev/null
+++ b/src/timer/timer_base/timers.cpp
@@ -0,0 +1,52 @@
+/*************************************************
+* Timestamp Functions Source File                *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/timers.h>
+#include <botan/loadstor.h>
+#include <botan/util.h>
+#include <ctime>
+
+namespace Botan {
+
+/*************************************************
+* Get the system clock                           *
+*************************************************/
+u64bit system_time()
+   {
+   return static_cast<u64bit>(std::time(0));
+   }
+
+/*************************************************
+* Default Timer clock reading                    *
+*************************************************/
+u64bit Timer::clock() const
+   {
+   return combine_timers(std::time(0), std::clock(), CLOCKS_PER_SEC);
+   }
+
+/*************************************************
+* Read the clock and return the output           *
+*************************************************/
+u32bit Timer::slow_poll(byte out[], u32bit length)
+   {
+   const u64bit clock_value = this->clock();
+
+   for(u32bit j = 0; j != sizeof(clock_value); ++j)
+      out[j % length] ^= get_byte(j, clock_value);
+
+   return (length < 8) ? length : 8;
+   }
+
+/*************************************************
+* Combine a two time values into a single one    *
+*************************************************/
+u64bit Timer::combine_timers(u32bit seconds, u32bit parts, u32bit parts_hz)
+   {
+   static const u64bit NANOSECONDS_UNITS = 1000000000;
+   parts *= (NANOSECONDS_UNITS / parts_hz);
+   return ((seconds * NANOSECONDS_UNITS) + parts);
+   }
+
+}