From 444653822e7afdc266026cd34e50e3e98a4e6081 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Tue, 1 Nov 2016 22:18:44 -0400
Subject: [PATCH] start on GapBuffer class

---
 src/core/GapBuffer.cc | 19 +++++++++++++++++++
 src/core/GapBuffer.h  | 19 +++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 src/core/GapBuffer.cc
 create mode 100644 src/core/GapBuffer.h

diff --git a/src/core/GapBuffer.cc b/src/core/GapBuffer.cc
new file mode 100644
index 0000000..bcfdde3
--- /dev/null
+++ b/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);
+}
diff --git a/src/core/GapBuffer.h b/src/core/GapBuffer.h
new file mode 100644
index 0000000..62643ed
--- /dev/null
+++ b/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