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code.h
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135 lines (116 loc) · 5.14 KB
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/* Definitions for bytecode */
#ifndef Py_LIMITED_API
#ifndef Py_CODE_H
#define Py_CODE_H
#ifdef __cplusplus
extern "C" {
#endif
/* Bytecode object */
typedef struct {
PyObject_HEAD
int co_argcount; /* #arguments, except *args */
int co_kwonlyargcount; /* #keyword only arguments */
int co_nlocals; /* #local variables */
int co_stacksize; /* #entries needed for evaluation stack */
int co_flags; /* CO_..., see below */
PyObject *co_code; /* instruction opcodes */
PyObject *co_consts; /* list (constants used) */
PyObject *co_names; /* list of strings (names used) */
PyObject *co_varnames; /* tuple of strings (local variable names) */
PyObject *co_freevars; /* tuple of strings (free variable names) */
PyObject *co_cellvars; /* tuple of strings (cell variable names) */
/* The rest aren't used in either hash or comparisons, except for
co_name (used in both) and co_firstlineno (used only in
comparisons). This is done to preserve the name and line number
for tracebacks and debuggers; otherwise, constant de-duplication
would collapse identical functions/lambdas defined on different lines.
*/
unsigned char *co_cell2arg; /* Maps cell vars which are arguments. */
PyObject *co_filename; /* unicode (where it was loaded from) */
PyObject *co_name; /* unicode (name, for reference) */
int co_firstlineno; /* first source line number */
PyObject *co_lnotab; /* string (encoding addr<->lineno mapping) See
Objects/lnotab_notes.txt for details. */
void *co_zombieframe; /* for optimization only (see frameobject.c) */
PyObject *co_weakreflist; /* to support weakrefs to code objects */
} PyCodeObject;
/* Masks for co_flags above */
#define CO_OPTIMIZED 0x0001
#define CO_NEWLOCALS 0x0002
#define CO_VARARGS 0x0004
#define CO_VARKEYWORDS 0x0008
#define CO_NESTED 0x0010
#define CO_GENERATOR 0x0020
/* The CO_NOFREE flag is set if there are no free or cell variables.
This information is redundant, but it allows a single flag test
to determine whether there is any extra work to be done when the
call frame it setup.
*/
#define CO_NOFREE 0x0040
/* The CO_COROUTINE flag is set for coroutine functions (defined with
``async def`` keywords) */
#define CO_COROUTINE 0x0080
#define CO_ITERABLE_COROUTINE 0x0100
/* These are no longer used. */
#if 0
#define CO_GENERATOR_ALLOWED 0x1000
#endif
#define CO_FUTURE_DIVISION 0x2000
#define CO_FUTURE_ABSOLUTE_IMPORT 0x4000 /* do absolute imports by default */
#define CO_FUTURE_WITH_STATEMENT 0x8000
#define CO_FUTURE_PRINT_FUNCTION 0x10000
#define CO_FUTURE_UNICODE_LITERALS 0x20000
#define CO_FUTURE_BARRY_AS_BDFL 0x40000
#define CO_FUTURE_GENERATOR_STOP 0x80000
/* This value is found in the co_cell2arg array when the associated cell
variable does not correspond to an argument. The maximum number of
arguments is 255 (indexed up to 254), so 255 work as a special flag.*/
#define CO_CELL_NOT_AN_ARG 255
/* This should be defined if a future statement modifies the syntax.
For example, when a keyword is added.
*/
#define PY_PARSER_REQUIRES_FUTURE_KEYWORD
#define CO_MAXBLOCKS 20 /* Max static block nesting within a function */
PyAPI_DATA(PyTypeObject) PyCode_Type;
#define PyCode_Check(op) (Py_TYPE(op) == &PyCode_Type)
#define PyCode_GetNumFree(op) (PyTuple_GET_SIZE((op)->co_freevars))
/* Public interface */
PyAPI_FUNC(PyCodeObject *) PyCode_New(
int, int, int, int, int, PyObject *, PyObject *,
PyObject *, PyObject *, PyObject *, PyObject *,
PyObject *, PyObject *, int, PyObject *);
/* same as struct above */
/* Creates a new empty code object with the specified source location. */
PyAPI_FUNC(PyCodeObject *)
PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno);
/* Return the line number associated with the specified bytecode index
in this code object. If you just need the line number of a frame,
use PyFrame_GetLineNumber() instead. */
PyAPI_FUNC(int) PyCode_Addr2Line(PyCodeObject *, int);
/* for internal use only */
typedef struct _addr_pair {
int ap_lower;
int ap_upper;
} PyAddrPair;
#ifndef Py_LIMITED_API
/* Update *bounds to describe the first and one-past-the-last instructions in the
same line as lasti. Return the number of that line.
*/
PyAPI_FUNC(int) _PyCode_CheckLineNumber(PyCodeObject* co,
int lasti, PyAddrPair *bounds);
/* Create a comparable key used to compare constants taking in account the
* object type. It is used to make sure types are not coerced (e.g., float and
* complex) _and_ to distinguish 0.0 from -0.0 e.g. on IEEE platforms
*
* Return (type(obj), obj, ...): a tuple with variable size (at least 2 items)
* depending on the type and the value. The type is the first item to not
* compare bytes and str which can raise a BytesWarning exception. */
PyAPI_FUNC(PyObject*) _PyCode_ConstantKey(PyObject *obj);
#endif
PyAPI_FUNC(PyObject*) PyCode_Optimize(PyObject *code, PyObject* consts,
PyObject *names, PyObject *lineno_obj);
#ifdef __cplusplus
}
#endif
#endif /* !Py_CODE_H */
#endif /* Py_LIMITED_API */