Merge commit '6e19bb560d474736d45f5be011ff0830c7019991' as 'spasm'

1 files changed, 51 insertions, 0 deletions

diff --git a/spasm/src/frames.hpp b/spasm/src/frames.hpp
new file mode 100644
index 0000000..14d1d14
--- /dev/null
+++ b/spasm/src/frames.hpp
@@ -0,0 +1,51 @@
+#ifndef FRAMES_HPP
+#define FRAMES_HPP
+
+#include <stack>
+
+#include "types.hpp"
+
+namespace SpasmImpl
+{
+//! Class representing the stack frame for a function
+/*!
+** The class is implemented as a simple stack of frames while each frame
+** is built up by a number of data_t objects
+*/
+class FrameStack
+{
+   public:
+    FrameStack();
+    FrameStack(const FrameStack&);
+    ~FrameStack();
+    FrameStack& operator=(const FrameStack&);
+
+    const data_t& operator[](size_t) const;
+    data_t& operator[](size_t);
+    void pop_frame();
+    void new_frame(size_t);
+    bool empty() const;
+
+   private:
+    //! pointer to the base of the stack
+    data_t* base_ptr;
+
+    //! pointer to the beginning of the current frame
+    data_t* frame_ptr;
+
+    //! size of the whole stack in data_t objects
+    size_t g_size;
+
+    //! size of the current frame in data_t objects
+    size_t c_size;
+
+    //! stack of the offsets between frames in the stack.
+    std::stack<size_t> fstack;
+
+    void copy_fstack(const FrameStack&);
+    void delete_fstack();
+};
+
+}  // namespace SpasmImpl
+
+#endif  // #ifndef FRAMES_HPP