Refactor random data generation

Add new RandomDataProvider object and implement existing random number
generation in terms of that.  This enables end users to supply their
own random data providers.

1 files changed, 32 insertions, 0 deletions

diff --git a/include/qpdf/RandomDataProvider.hh b/include/qpdf/RandomDataProvider.hh
new file mode 100644
index 00000000..68c9cb6e
--- /dev/null
+++ b/include/qpdf/RandomDataProvider.hh
@@ -0,0 +1,32 @@
+/* Copyright (c) 2005-2013 Jay Berkenbilt
+ *
+ * This file is part of qpdf.  This software may be distributed under
+ * the terms of version 2 of the Artistic License which may be found
+ * in the source distribution.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef __RANDOMDATAPROVIDER_HH__
+#define __RANDOMDATAPROVIDER_HH__
+
+#include <string.h> // for size_t
+
+class RandomDataProvider
+{
+  public:
+    virtual ~RandomDataProvider()
+    {
+    }
+    virtual void provideRandomData(unsigned char* data, size_t len) = 0;
+
+  protected:
+    RandomDataProvider()
+    {
+    }
+
+  private:
+    RandomDataProvider(RandomDataProvider const&);
+    RandomDataProvider& operator=(RandomDataProvider const&);
+};
+
+#endif // __RANDOMDATAPROVIDER_HH__