c8042e1076
The Include, Parser, and Python directories from the cPython 2.7.10 distribution. These files are unchanged and set the baseline for subsequent commits. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Daryl McDaniel <edk2-lists@mc2research.org> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18737 6f19259b-4bc3-4df7-8a09-765794883524
75 lines
2.8 KiB
C
75 lines
2.8 KiB
C
/* Memory view object. In Python this is available as "memoryview". */
|
|
|
|
#ifndef Py_MEMORYOBJECT_H
|
|
#define Py_MEMORYOBJECT_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
PyAPI_DATA(PyTypeObject) PyMemoryView_Type;
|
|
|
|
#define PyMemoryView_Check(op) (Py_TYPE(op) == &PyMemoryView_Type)
|
|
|
|
/* Get a pointer to the underlying Py_buffer of a memoryview object. */
|
|
#define PyMemoryView_GET_BUFFER(op) (&((PyMemoryViewObject *)(op))->view)
|
|
/* Get a pointer to the PyObject from which originates a memoryview object. */
|
|
#define PyMemoryView_GET_BASE(op) (((PyMemoryViewObject *)(op))->view.obj)
|
|
|
|
|
|
PyAPI_FUNC(PyObject *) PyMemoryView_GetContiguous(PyObject *base,
|
|
int buffertype,
|
|
char fort);
|
|
|
|
/* Return a contiguous chunk of memory representing the buffer
|
|
from an object in a memory view object. If a copy is made then the
|
|
base object for the memory view will be a *new* bytes object.
|
|
|
|
Otherwise, the base-object will be the object itself and no
|
|
data-copying will be done.
|
|
|
|
The buffertype argument can be PyBUF_READ, PyBUF_WRITE,
|
|
PyBUF_SHADOW to determine whether the returned buffer
|
|
should be READONLY, WRITABLE, or set to update the
|
|
original buffer if a copy must be made. If buffertype is
|
|
PyBUF_WRITE and the buffer is not contiguous an error will
|
|
be raised. In this circumstance, the user can use
|
|
PyBUF_SHADOW to ensure that a a writable temporary
|
|
contiguous buffer is returned. The contents of this
|
|
contiguous buffer will be copied back into the original
|
|
object after the memoryview object is deleted as long as
|
|
the original object is writable and allows setting an
|
|
exclusive write lock. If this is not allowed by the
|
|
original object, then a BufferError is raised.
|
|
|
|
If the object is multi-dimensional and if fortran is 'F',
|
|
the first dimension of the underlying array will vary the
|
|
fastest in the buffer. If fortran is 'C', then the last
|
|
dimension will vary the fastest (C-style contiguous). If
|
|
fortran is 'A', then it does not matter and you will get
|
|
whatever the object decides is more efficient.
|
|
|
|
A new reference is returned that must be DECREF'd when finished.
|
|
*/
|
|
|
|
PyAPI_FUNC(PyObject *) PyMemoryView_FromObject(PyObject *base);
|
|
|
|
PyAPI_FUNC(PyObject *) PyMemoryView_FromBuffer(Py_buffer *info);
|
|
/* create new if bufptr is NULL
|
|
will be a new bytesobject in base */
|
|
|
|
|
|
/* The struct is declared here so that macros can work, but it shouldn't
|
|
be considered public. Don't access those fields directly, use the macros
|
|
and functions instead! */
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject *base;
|
|
Py_buffer view;
|
|
} PyMemoryViewObject;
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_MEMORYOBJECT_H */
|