cpython/Include/tupleobject.h

#ifndef Py_TUPLEOBJECT_H
#define Py_TUPLEOBJECT_H
#ifdef __cplusplus
extern "C" {
#endif

/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI or Corporation for National Research Initiatives or
CNRI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

While CWI is the initial source for this software, a modified version
is made available by the Corporation for National Research Initiatives
(CNRI) at the Internet address ftp://ftp.python.org.

STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

******************************************************************/

/* Tuple object interface */

/*
123456789-123456789-123456789-123456789-123456789-123456789-123456789-12

Another generally useful object type is an tuple of object pointers.
This is a mutable type: the tuple items can be changed (but not their
number).  Out-of-range indices or non-tuple objects are ignored.

*** WARNING *** PyTuple_SetItem does not increment the new item's reference
count, but does decrement the reference count of the item it replaces,
if not nil.  It does *decrement* the reference count if it is *not*
inserted in the tuple.  Similarly, PyTuple_GetItem does not increment the
returned item's reference count.
*/

typedef struct {
	PyObject_VAR_HEAD
	PyObject *ob_item[1];
} PyTupleObject;

extern DL_IMPORT(PyTypeObject) PyTuple_Type;

#define PyTuple_Check(op) ((op)->ob_type == &PyTuple_Type)

extern DL_IMPORT(PyObject *) PyTuple_New Py_PROTO((int size));
extern DL_IMPORT(int) PyTuple_Size Py_PROTO((PyObject *));
extern DL_IMPORT(PyObject *) PyTuple_GetItem Py_PROTO((PyObject *, int));
extern DL_IMPORT(int) PyTuple_SetItem Py_PROTO((PyObject *, int, PyObject *));
extern DL_IMPORT(PyObject *) PyTuple_GetSlice Py_PROTO((PyObject *, int, int));
extern DL_IMPORT(int) _PyTuple_Resize Py_PROTO((PyObject **, int, int));

/* Macro, trading safety for speed */
#define PyTuple_GET_ITEM(op, i) (((PyTupleObject *)(op))->ob_item[i])
#define PyTuple_GET_SIZE(op)    (((PyTupleObject *)(op))->ob_size)

/* Macro, *only* to be used to fill in brand new tuples */
#define PyTuple_SET_ITEM(op, i, v) (((PyTupleObject *)(op))->ob_item[i] = v)

#ifdef __cplusplus
}
#endif
#endif /* !Py_TUPLEOBJECT_H */