From f0510d2f90467de8e8f260b47d79a9baaf9bef17 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 17 Sep 2009 07:15:29 +0200
Subject: Start tracking XSD with git

---
 examples/cxx/parser/performance/time.hxx | 111 +++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 examples/cxx/parser/performance/time.hxx

(limited to 'examples/cxx/parser/performance/time.hxx')

diff --git a/examples/cxx/parser/performance/time.hxx b/examples/cxx/parser/performance/time.hxx
new file mode 100644
index 0000000..37ec457
--- /dev/null
+++ b/examples/cxx/parser/performance/time.hxx
@@ -0,0 +1,111 @@
+// file      : examples/cxx/parser/performance/time.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#ifndef TIME_HXX
+#define TIME_HXX
+
+#include <iosfwd> // std::ostream&
+
+namespace os
+{
+  class time
+  {
+  public:
+    class failed {};
+
+    // Create a time object representing the current time.
+    //
+    time ();
+
+    time (unsigned long long nsec)
+    {
+      sec_  = static_cast<unsigned long> (nsec / 1000000000ULL);
+      nsec_ = static_cast<unsigned long> (nsec % 1000000000ULL);
+    }
+
+    time (unsigned long sec, unsigned long nsec)
+    {
+      sec_  = sec;
+      nsec_ = nsec;
+    }
+
+  public:
+    unsigned long
+    sec () const
+    {
+      return sec_;
+    }
+
+    unsigned long
+    nsec () const
+    {
+      return nsec_;
+    }
+
+  public:
+    class overflow {};
+    class underflow {};
+
+    time
+    operator+= (time const& b)
+    {
+      unsigned long long tmp = 0ULL + nsec_ + b.nsec_;
+
+      sec_ += static_cast<unsigned long> (b.sec_ + tmp / 1000000000ULL);
+      nsec_ = static_cast<unsigned long> (tmp % 1000000000ULL);
+
+      return *this;
+    }
+
+    time
+    operator-= (time const& b)
+    {
+      if (*this < b)
+        throw underflow ();
+
+      sec_ -= b.sec_;
+
+      if (nsec_ < b.nsec_)
+      {
+        --sec_;
+        nsec_ += 1000000000ULL - b.nsec_;
+      }
+      else
+        nsec_ -= b.nsec_;
+
+      return *this;
+    }
+
+    friend time
+    operator+ (time const& a, time const& b)
+    {
+      time r (a);
+      r += b;
+      return r;
+    }
+
+    friend time
+    operator- (time const& a, time const& b)
+    {
+      time r (a);
+      r -= b;
+      return r;
+    }
+
+    friend bool
+    operator < (time const& a, time const& b)
+    {
+      return (a.sec_ < b.sec_) || (a.sec_ == b.sec_ && a.nsec_ < b.nsec_);
+    }
+
+  private:
+    unsigned long sec_;
+    unsigned long nsec_;
+  };
+
+  std::ostream&
+  operator<< (std::ostream&, time const&);
+}
+
+#endif // TIME_HXX
-- 
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