Initial commit

arm9/source/gui/DescendingStackVramManager.h

@@ -0,0 +1,35 @@
+#pragma once
+#include "StackVramManager.h"
+
+/// @brief Stack vram manager that decreases the stack pointer before an allocation.
+class DescendingStackVramManager : public StackVramManager
+{
+public:
+    /// @brief Creates a new DescendingStackVramManager.
+    /// @param vramSize The size of the vram block to manage.
+    ///                 This will be used as the initial offset.
+    explicit DescendingStackVramManager(u32 vramSize)
+        : _size(vramSize)
+    {
+        _offset = vramSize;
+    }
+
+    /// @brief Creates a new DescendingStackVramManager.
+    /// @param vramAddress Pointer to the start of the vram block to manage.
+    /// @param vramSize The size of the vram block to manage.
+    ///                 This will be used as the initial offset.
+    DescendingStackVramManager(vu16* vramAddress, u32 vramSize)
+        : StackVramManager(vramAddress), _size(vramSize)
+    {
+        _offset = vramSize;
+    }
+
+    u32 Alloc(u32 length) override
+    {
+        _offset -= length;
+        return _offset;
+    }
+
+private:
+    u32 _size;
+};