1 files changed, 118 insertions, 0 deletions
diff --git a/src/lib/utils/timer.cpp b/src/lib/utils/timer.cpp
new file mode 100644
index 000000000..5d64e63fb
--- /dev/null
+++ b/src/lib/utils/timer.cpp
@@ -0,0 +1,118 @@
+/*
+* (C) 2018 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/internal/timer.h>
+#include <algorithm>
+#include <sstream>
+#include <iomanip>
+
+namespace Botan {
+
+void Timer::stop()
+   {
+   if(m_timer_start)
+      {
+      const uint64_t now = Timer::get_system_timestamp_ns();
+
+      if(now > m_timer_start)
+         {
+         uint64_t dur = now - m_timer_start;
+
+         m_time_used += dur;
+
+         if(m_cpu_cycles_start != 0)
+            {
+            uint64_t cycles_taken = Timer::get_cpu_cycle_counter() - m_cpu_cycles_start;
+            if(cycles_taken > 0)
+               {
+               m_cpu_cycles_used += static_cast<size_t>(cycles_taken * m_clock_cycle_ratio);
+               }
+            }
+
+         if(m_event_count == 0)
+            {
+            m_min_time = m_max_time = dur;
+            }
+         else
+            {
+            m_max_time = std::max(m_max_time, dur);
+            m_min_time = std::min(m_min_time, dur);
+            }
+         }
+
+      m_timer_start = 0;
+      ++m_event_count;
+      }
+   }
+
+std::string Timer::result_string_bps() const
+   {
+   const size_t MiB = 1024 * 1024;
+
+   const double MiB_total = static_cast<double>(events()) / MiB;
+   const double MiB_per_sec = MiB_total / seconds();
+
+   std::ostringstream oss;
+   oss << get_name();
+
+   if(!doing().empty())
+      {
+      oss << " " << doing();
+      }
+
+   if(buf_size() > 0)
+      {
+      oss << " buffer size " << buf_size() << " bytes:";
+      }
+
+   if(events() == 0)
+      oss << " " << "N/A";
+   else
+      oss << " " << std::fixed << std::setprecision(3) << MiB_per_sec << " MiB/sec";
+
+   if(cycles_consumed() != 0)
+      {
+      const double cycles_per_byte = static_cast<double>(cycles_consumed()) / events();
+      oss << " " << std::fixed << std::setprecision(2) << cycles_per_byte << " cycles/byte";
+      }
+
+   oss << " (" << MiB_total << " MiB in " << milliseconds() << " ms)\n";
+
+   return oss.str();
+   }
+
+std::string Timer::result_string_ops() const
+   {
+   std::ostringstream oss;
+
+   oss << get_name() << " ";
+
+   if(events() == 0)
+      {
+      oss << "no events\n";
+      }
+   else
+      {
+      oss << static_cast<uint64_t>(events_per_second())
+          << ' ' << doing() << "/sec; "
+          << std::setprecision(2) << std::fixed
+          << ms_per_event() << " ms/op";
+
+      if(cycles_consumed() != 0)
+         {
+         const double cycles_per_op = static_cast<double>(cycles_consumed()) / events();
+         const size_t precision = (cycles_per_op < 10000) ? 2 : 0;
+         oss << " " << std::fixed << std::setprecision(precision) << cycles_per_op << " cycles/op";
+         }
+
+      oss << " (" << events() << " " << (events() == 1 ? "op" : "ops")
+          << " in " << milliseconds() << " ms)\n";
+      }
+
+   return oss.str();
+   }
+
+}