start on GapBuffer class

src/core/GapBuffer.cc

@@ -0,0 +1,19 @@
+#include "GapBuffer.h"
+#include "System.h"
+
+GapBuffer::GapBuffer()
+{
+    m_buffer = (uint8_t *)System::alloc_pages(1u);
+    m_size = System::page_size;
+}
+
+GapBuffer::GapBuffer(uint8_t * buffer, size_t size)
+{
+    m_buffer = buffer;
+    m_size = size;
+}
+
+GapBuffer::~GapBuffer()
+{
+    System::free_pages(m_buffer, m_size >> System::page_size_log);
+}

src/core/GapBuffer.h

@@ -0,0 +1,19 @@
+#ifndef GAPBUFFER_H
+#define GAPBUFFER_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+class GapBuffer
+{
+public:
+    GapBuffer();
+    GapBuffer(uint8_t * buffer, size_t size);
+    ~GapBuffer();
+
+protected:
+    uint8_t * m_buffer;
+    size_t m_size;
+};
+
+#endif