text: 
  /* Frame object interface */
  
  #ifndef Py_FRAMEOBJECT_H
  #define Py_FRAMEOBJECT_H
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  typedef struct {
      int b_type;			/* what kind of block this is */
      int b_handler;		/* where to jump to find handler */
      int b_level;		/* value stack level to pop to */
  } PyTryBlock;
  
  typedef struct _frame {
      PyObject_VAR_HEAD
      struct _frame *f_back;	/* previous frame, or NULL */
      PyCodeObject *f_code;	/* code segment */
      PyObject *f_builtins;	/* builtin symbol table (PyDictObject) */
      PyObject *f_globals;	/* global symbol table (PyDictObject) */
      PyObject *f_locals;		/* local symbol table (any mapping) */
      PyObject **f_valuestack;	/* points after the last local */
      /* Next free slot in f_valuestack.  Frame creation sets to f_valuestack.
         Frame evaluation usually NULLs it, but a frame that yields sets it
         to the current stack top. */
      PyObject **f_stacktop;
      PyObject *f_trace;		/* Trace function */
  
      /* If an exception is raised in this frame, the next three are used to
       * record the exception info (if any) originally in the thread state.  See
       * comments before set_exc_info() -- it's not obvious.
       * Invariant:  if _type is NULL, then so are _value and _traceback.
       * Desired invariant:  all three are NULL, or all three are non-NULL.  That
       * one isn't currently true, but "should be".
       */
      PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;
  
      PyThreadState *f_tstate;
      int f_lasti;		/* Last instruction if called */
      /* Call PyFrame_GetLineNumber() instead of reading this field
         directly.  As of 2.3 f_lineno is only valid when tracing is
         active (i.e. when f_trace is set).  At other times we use
         PyCode_Addr2Line to calculate the line from the current
         bytecode index. */
      int f_lineno;		/* Current line number */
      int f_iblock;		/* index in f_blockstack */
      PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */
      PyObject *f_localsplus[1];	/* locals+stack, dynamically sized */
  } PyFrameObject;
  
  
  /* Standard object interface */
  
  PyAPI_DATA(PyTypeObject) PyFrame_Type;
  
  #define PyFrame_Check(op) ((op)->ob_type == &PyFrame_Type)
  #define PyFrame_IsRestricted(f) \
  	((f)->f_builtins != (f)->f_tstate->interp->builtins)
  
  PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,
                                         PyObject *, PyObject *);
  
  
  /* The rest of the interface is specific for frame objects */
  
  /* Block management functions */
  
  PyAPI_FUNC(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int);
  PyAPI_FUNC(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *);
  
  /* Extend the value stack */
  
  PyAPI_FUNC(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int);
  
  /* Conversions between "fast locals" and locals in dictionary */
  
  PyAPI_FUNC(void) PyFrame_LocalsToFast(PyFrameObject *, int);
  PyAPI_FUNC(void) PyFrame_FastToLocals(PyFrameObject *);
  
  PyAPI_FUNC(int) PyFrame_ClearFreeList(void);
  
  PyAPI_FUNC(void) _PyFrame_DebugMallocStats(FILE *out);
  
  /* Return the line of code the frame is currently executing. */
  PyAPI_FUNC(int) PyFrame_GetLineNumber(PyFrameObject *);
  
  #ifdef __cplusplus
  }
  #endif
  #endif /* !Py_FRAMEOBJECT_H */
  