Start support for multiple build targets.

src/base/core/streams/IOStream.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "Vector.h"
+#include "Stream.h"
+
+template<typename T>
+class InputStream : public Stream
+{
+public:
+    virtual bool get(T& item) = 0;
+
+    virtual int get(Vector<T>& items)
+    {
+        size_t count = 0;
+        T item;
+        while(good() && count < items.size())
+        {
+            if (const auto ok = get(item); !ok)
+            {
+                break;
+            }
+            items[count] = item;
+            count++;
+        }
+        if (has_error())
+        {
+            return -1;
+        }
+        else 
+        {
+            return count;
+        }
+    }
+};
+
+template<typename T>
+class OutputStream : public Stream
+{
+public:
+    virtual int write(T* data, size_t size) = 0;
+};