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/* Frame object interface */

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#ifndef Py_LIMITED_API

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#ifndef Py_FRAMEOBJECT_H

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#define Py_FRAMEOBJECT_H

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#ifdef __cplusplus

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extern "C" {

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#endif

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typedef struct {

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int b_type; /* what kind of block this is */

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int b_handler; /* where to jump to find handler */

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int b_level; /* value stack level to pop to */

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} PyTryBlock;

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typedef struct _frame {

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PyObject_VAR_HEAD

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struct _frame *f_back; /* previous frame, or NULL */

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PyCodeObject *f_code; /* code segment */

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PyObject *f_builtins; /* builtin symbol table (PyDictObject) */

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PyObject *f_globals; /* global symbol table (PyDictObject) */

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PyObject *f_locals; /* local symbol table (any mapping) */

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PyObject **f_valuestack; /* points after the last local */

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/* Next free slot in f_valuestack. Frame creation sets to f_valuestack.

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Frame evaluation usually NULLs it, but a frame that yields sets it

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to the current stack top. */

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PyObject **f_stacktop;

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PyObject *f_trace; /* Trace function */

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/* In a generator, we need to be able to swap between the exception

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state inside the generator and the exception state of the calling

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frame (which shouldn't be impacted when the generator "yields"

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from an except handler).

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These three fields exist exactly for that, and are unused for

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non-generator frames. See the save_exc_state and swap_exc_state

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functions in ceval.c for details of their use. */

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PyObject *f_exc_type, *f_exc_value, *f_exc_traceback;

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/* Borrowed reference to a generator, or NULL */

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PyObject *f_gen;

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int f_lasti; /* Last instruction if called */

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/* Call PyFrame_GetLineNumber() instead of reading this field

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directly. As of 2.3 f_lineno is only valid when tracing is

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active (i.e. when f_trace is set). At other times we use

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PyCode_Addr2Line to calculate the line from the current

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bytecode index. */

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int f_lineno; /* Current line number */

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int f_iblock; /* index in f_blockstack */

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char f_executing; /* whether the frame is still executing */

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PyTryBlock f_blockstack[CO_MAXBLOCKS]; /* for try and loop blocks */

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PyObject *f_localsplus[1]; /* locals+stack, dynamically sized */

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} PyFrameObject;

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/* Standard object interface */

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PyAPI_DATA(PyTypeObject) PyFrame_Type;

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#define PyFrame_Check(op) (Py_TYPE(op) == &PyFrame_Type)

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PyAPI_FUNC(PyFrameObject *) PyFrame_New(PyThreadState *, PyCodeObject *,

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PyObject *, PyObject *);

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/* The rest of the interface is specific for frame objects */

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/* Block management functions */

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PyAPI_FUNC(void) PyFrame_BlockSetup(PyFrameObject *, int, int, int);

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PyAPI_FUNC(PyTryBlock *) PyFrame_BlockPop(PyFrameObject *);

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/* Extend the value stack */

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PyAPI_FUNC(PyObject **) PyFrame_ExtendStack(PyFrameObject *, int, int);

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/* Conversions between "fast locals" and locals in dictionary */

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PyAPI_FUNC(void) PyFrame_LocalsToFast(PyFrameObject *, int);

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PyAPI_FUNC(int) PyFrame_FastToLocalsWithError(PyFrameObject *f);

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PyAPI_FUNC(void) PyFrame_FastToLocals(PyFrameObject *);

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PyAPI_FUNC(int) PyFrame_ClearFreeList(void);

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PyAPI_FUNC(void) _PyFrame_DebugMallocStats(FILE *out);

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/* Return the line of code the frame is currently executing. */

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PyAPI_FUNC(int) PyFrame_GetLineNumber(PyFrameObject *);

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#ifdef __cplusplus

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}

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#endif

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#endif /* !Py_FRAMEOBJECT_H */

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#endif /* Py_LIMITED_API */

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