Better win_o ignores. The random number system is pretty much together.

We need a few extra helper functions to cover some other good things, like
normalized floating point numbers, etc.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/experimental/randomsystem.cpp b/src/experimental/randomsystem.cpp
new file mode 100644
index 0000000..0501587
--- /dev/null
+++ b/src/experimental/randomsystem.cpp
@@ -0,0 +1,40 @@
+#include "bu/randomsystem.h"
+#include "bu/file.h"
+
+Bu::RandomSystem::RandomSystem( Type eType ) :
+        eType( eType ),
+        pSrc( 0 )
+{
+        switch( eType )
+        {
+                case Bu::RandomSystem::Fast:
+                        pSrc = new Bu::File("/dev/urandom", Bu::File::Read );
+                        break;
+
+                case Bu::RandomSystem::Good:
+                        pSrc = new Bu::File("/dev/random", Bu::File::Read );
+                        break;
+        }
+}
+
+Bu::RandomSystem::~RandomSystem()
+{
+        delete pSrc;
+}
+
+void Bu::RandomSystem::seed( int32_t /*iSeed*/ )
+{
+        // Seed really has no effect here...
+        // on linux, if we were root, we could write data to random/urandom to
+        // perturb the data, but it's not necesarry
+}
+
+int32_t Bu::RandomSystem::rand()
+{
+        if( !pSrc )
+                throw Bu::ExceptionBase("Not initialized");
+        int32_t i;
+        pSrc->read( &i, sizeof(int32_t) );
+        return i;
+}
+