Added string classes

include/internal/catch_stringdata.cpp

@@ -0,0 +1,49 @@
+/*
+ *  Copyright 2016 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+
+#include "catch_stringdata.h"
+#include "catch_stringref.h"
+
+#include <new>
+#include <cstring>
+#include <cassert>
+
+namespace Catch {
+    
+    auto StringData::getEmpty() -> StringData* {
+        static StringData s_empty( 0 );
+        return &s_empty;
+    }
+    auto StringData::create( StringRef const& stringRef ) -> StringData* {
+        return create( stringRef, stringRef.size() );
+    }
+    auto StringData::create( StringRef const& stringRef, unsigned long capacity ) -> StringData* {
+        if( capacity == 0 ) {
+            return getEmpty();
+        }
+        else {
+            assert( stringRef.size() <= capacity );
+            auto bufferLen = sizeof(StringData)+capacity;
+            void* buffer = new char[bufferLen];
+            
+            return new(buffer) StringData( stringRef, capacity );
+        }
+    }
+    StringData::StringData( unsigned int initialRef )
+    :   m_refs( initialRef ),
+        size( 0 )
+    {}
+    StringData::StringData( StringRef const& stringRef, unsigned long capacity )
+    :   m_refs( 1 ),
+        size( capacity)
+    {
+        std::memcpy( chars, stringRef.data(), stringRef.size() );
+        chars[stringRef.size() ] = 0;
+    }
+    
+} // namespace Catch