src/multiarray/common.c File Reference

#include <Python.h>
#include "numpy/arrayobject.h"
#include "npy_config.h"
#include "numpy/npy_3kcompat.h"
#include "usertypes.h"
#include "common.h"
#include "buffer.h"

Defines
#define	PY_SSIZE_T_CLEAN
#define	NPY_NO_DEPRECATED_API
#define	_MULTIARRAYMODULE
#define	NPY_NO_PREFIX
Functions
NPY_NO_EXPORT PyArray_Descr *	_array_find_python_scalar_type (PyObject *op)
static PyArray_Descr *	_use_default_type (PyObject *op)
NPY_NO_EXPORT PyArray_Descr *	_array_find_type (PyObject *op, PyArray_Descr *minitype, int max)
NPY_NO_EXPORT PyArray_Descr *	_array_typedescr_fromstr (char *str)
NPY_NO_EXPORT char *	index2ptr (PyArrayObject *mp, intp i)
NPY_NO_EXPORT int	_zerofill (PyArrayObject *ret)
NPY_NO_EXPORT int	_IsAligned (PyArrayObject *ap)
NPY_NO_EXPORT Bool	_IsWriteable (PyArrayObject *ap)

---

Define Documentation

#define _MULTIARRAYMODULE

#define NPY_NO_DEPRECATED_API

#define NPY_NO_PREFIX

#define PY_SSIZE_T_CLEAN

---

Function Documentation

NPY_NO_EXPORT PyArray_Descr* _array_find_python_scalar_type

(

PyObject *

op

)

bools are a subclass of int

if integer can fit into a longlong then return that

References PyArray_BOOL, PyArray_CDOUBLE, PyArray_DescrFromType(), PyArray_DOUBLE, PyArray_LONG, PyArray_LONGLONG, and PyArray_OBJECT.

NPY_NO_EXPORT PyArray_Descr* _array_find_type	(	PyObject *	op,
		PyArray_Descr *	minitype,
		int	max
	)

op is an object to be converted to an ndarray.

minitype is the minimum type-descriptor needed.

max is the maximum number of dimensions -- used for recursive call to avoid infinite recursion...

These need to come first because if op already carries a descr structure, then we want it to be the result if minitype is NULL.

VOID Arrays should not occur by "default" unless input was already a VOID

References PyArray_DESCR.

NPY_NO_EXPORT PyArray_Descr* _array_typedescr_fromstr

(

char *

str

)

new reference

Need to make a new PyArray_Descr

References NPY_BOOL.

NPY_NO_EXPORT int _IsAligned

(

PyArrayObject *

ap

)

The special casing for STRING and VOID types was removed in accordance with http://projects.scipy.org/numpy/ticket/1227 It used to be that IsAligned always returned True for these types, which is indeed the case when they are created using PyArray_DescrConverter(), but not necessarily when using PyArray_DescrAlignConverter().

Referenced by array_trace(), and PyArray_UpdateFlags().

NPY_NO_EXPORT Bool _IsWriteable

(

PyArrayObject *

ap

)

If we own our own data, then no-problem

Get to the final base object If it is a writeable array, then return TRUE If we can find an array object or a writeable buffer object as the final base object or a string object (for pickling support memory savings).

• this last could be removed if a proper pickleable buffer was added to Python.

here so pickle support works seamlessly and unpickled array can be set and reset writeable -- could be abused --

Referenced by PyArray_UpdateFlags().

static PyArray_Descr* _use_default_type

(

PyObject *

op

)

[static]

References PyArray_USERDEF, _PyArray_Descr::typeobj, and userdescrs.

NPY_NO_EXPORT int _zerofill

(

PyArrayObject *

ret

)

References _PyArray_Descr::alignment, PyArrayObject::data, PyArrayObject::descr, and PyArrayObject::nd.

NPY_NO_EXPORT char* index2ptr	(	PyArrayObject *	mp,
		intp	i
	)

Referenced by array_length().