From a2e766f136f7692d79bcbadbd52b3198d1fdd6e8 Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Sun, 28 Feb 2016 08:20:28 +0100
Subject: [PATCH] Print the seed of CGAL::default_random in the testsuite  or
 when CGAL_PRINT_SEED is defined

---
 Random_numbers/include/CGAL/Random.h      |  4 +++-
 Random_numbers/include/CGAL/Random_impl.h | 19 +++++++++++++++++++
 Random_numbers/src/CGAL/Random.cpp        |  2 +-
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/Random_numbers/include/CGAL/Random.h b/Random_numbers/include/CGAL/Random.h
index 665dd78cb23..b794ab1be33 100644
--- a/Random_numbers/include/CGAL/Random.h
+++ b/Random_numbers/include/CGAL/Random.h
@@ -66,6 +66,7 @@ public:
   // creation
   CGAL_EXPORT Random( );
   CGAL_EXPORT Random( unsigned int  seed);
+  CGAL_EXPORT Random(char*);
   
   // seed
   CGAL_EXPORT unsigned int get_seed ( ) const;
@@ -237,7 +238,8 @@ CGAL_EXPORT extern  Random  default_random;
 #ifdef CGAL_HEADER_ONLY
 inline Random& get_default_random()
 {
-  static Random default_random;
+  static Random default_random("default");
+  std::cerr << "get_default_random()" << std::endl;
   return default_random;
 }
 #else // CGAL_HEADER_ONLY
diff --git a/Random_numbers/include/CGAL/Random_impl.h b/Random_numbers/include/CGAL/Random_impl.h
index 16cb9e0cbd3..17cbd503c94 100644
--- a/Random_numbers/include/CGAL/Random_impl.h
+++ b/Random_numbers/include/CGAL/Random_impl.h
@@ -62,6 +62,25 @@ Random( unsigned int  seed)
     random_value = get_int(0, 1<<15);
 }
 
+
+CGAL_INLINE_FUNCTION
+Random::
+Random(char* )
+    :  val(0)
+{
+    // get system's time
+    std::time_t s;
+    std::time( &s);
+    seed = (unsigned int)s;
+
+#if defined( CGAL_TEST_SUITE ) || defined( CGAL_PRINT_SEED )
+    std::cerr << "default_random::get_seed() = " << seed << std::endl;
+#endif
+    // initialize random numbers generator
+    rng.seed(static_cast<boost::int32_t>(seed));
+    random_value = get_int(0, 1<<15);
+}
+
 // seed
 CGAL_INLINE_FUNCTION
 unsigned int
diff --git a/Random_numbers/src/CGAL/Random.cpp b/Random_numbers/src/CGAL/Random.cpp
index 471accc5128..c88e1b7de65 100644
--- a/Random_numbers/src/CGAL/Random.cpp
+++ b/Random_numbers/src/CGAL/Random.cpp
@@ -29,7 +29,7 @@
 
 namespace CGAL {
 
-Random  default_random;
+  Random  default_random = Random("default");
 
 } //namespace CGAL