Import all this stuff into a single repo called Serenity.

AK/Bitmap.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include "StdLib.h"
+#include "Types.h"
+#include "kmalloc.h"
+
+namespace AK {
+
+class Bitmap {
+public:
+    // NOTE: A wrapping Bitmap won't try to free the wrapped data.
+    static Bitmap wrap(byte* data, unsigned size)
+    {
+        return Bitmap(data, size);
+    }
+
+    static Bitmap create(unsigned size)
+    {
+        return Bitmap(size);
+    }
+
+    ~Bitmap()
+    {
+        if (m_owned)
+            kfree(m_data);
+        m_data = nullptr;
+    }
+
+    unsigned size() const { return m_size; }
+    bool get(unsigned index) const
+    {
+        ASSERT(index < m_size);
+        return 0 != (m_data[index / 8] & (1u << (index % 8)));
+    }
+    void set(unsigned index, bool value) const
+    {
+        ASSERT(index < m_size);
+        if (value)
+            m_data[index / 8] |= static_cast<byte>((1u << (index % 8)));
+        else
+            m_data[index / 8] &= static_cast<byte>(~(1u << (index % 8)));
+    }
+
+    byte* data() { return m_data; }
+    const byte* data() const { return m_data; }
+
+private:
+    explicit Bitmap(unsigned size)
+        : m_size(size)
+        , m_owned(true)
+    {
+        ASSERT(m_size != 0);
+        m_data = reinterpret_cast<byte*>(kmalloc(ceilDiv(size, 8u)));
+    }
+
+    Bitmap(byte* data, unsigned size)
+        : m_data(data)
+        , m_size(size)
+        , m_owned(false)
+    {
+    }
+
+    byte* m_data { nullptr };
+    unsigned m_size { 0 };
+    bool m_owned { false };
+};
+
+}
+
+using AK::Bitmap;
+