src/multiarray/convert.c File Reference

#include <Python.h>
#include "structmember.h"
#include <npy_config.h>
#include "numpy/arrayobject.h"
#include "numpy/arrayscalars.h"
#include "npy_pycompat.h"
#include "arrayobject.h"
#include "ctors.h"
#include "mapping.h"
#include "lowlevel_strided_loops.h"
#include "scalartypes.h"
#include "array_assign.h"
#include "convert.h"

Defines
#define	PY_SSIZE_T_CLEAN
#define	NPY_NO_DEPRECATED_API   NPY_API_VERSION
#define	_MULTIARRAYMODULE
Functions
int	fallocate (int fd, int mode, off_t offset, off_t len)
static int	npy_fallocate (npy_intp nbytes, FILE *fp)
static PyObject *	recursive_tolist (PyArrayObject *self, char *dataptr, int startdim)
NPY_NO_EXPORT PyObject *	PyArray_ToList (PyArrayObject *self)
NPY_NO_EXPORT int	PyArray_ToFile (PyArrayObject *self, FILE *fp, char *sep, char *format)
NPY_NO_EXPORT PyObject *	PyArray_ToString (PyArrayObject *self, NPY_ORDER order)
NPY_NO_EXPORT int	PyArray_FillWithScalar (PyArrayObject *arr, PyObject *obj)
NPY_NO_EXPORT int	PyArray_AssignZero (PyArrayObject *dst, PyArrayObject *wheremask)
NPY_NO_EXPORT int	PyArray_AssignOne (PyArrayObject *dst, PyArrayObject *wheremask)
NPY_NO_EXPORT PyObject *	PyArray_NewCopy (PyArrayObject *obj, NPY_ORDER order)
NPY_NO_EXPORT PyObject *	PyArray_View (PyArrayObject *self, PyArray_Descr *type, PyTypeObject *pytype)

---

Define Documentation

#define _MULTIARRAYMODULE

#define NPY_NO_DEPRECATED_API   NPY_API_VERSION

#define PY_SSIZE_T_CLEAN

---

Function Documentation

int fallocate	(	int	fd,
		int	mode,
		off_t	offset,
		off_t	len
	)

Referenced by npy_fallocate().

static int npy_fallocate	(	npy_intp	nbytes,
		FILE *	fp
	)		[static]

allocate nbytes of diskspace for file fp this allows the filesystem to make smarter allocation decisions and gives a fast exit on not enough free space returns -1 and raises exception on no space, ignores all other errors

unknown behavior on non-linux so don't try it we don't want explicit zeroing to happen

References fallocate(), NPY_BEGIN_ALLOW_THREADS, NPY_END_ALLOW_THREADS, npy_ftell, and NPY_INTP_FMT.

NPY_NO_EXPORT int PyArray_AssignOne	(	PyArrayObject *	dst,
		PyArrayObject *	wheremask
	)

Fills an array with ones.

dst: The destination array. wheremask: If non-NULL, a boolean mask specifying where to set the values.

Returns 0 on success, -1 on failure.

Create a raw bool scalar with the value True

NPY_NO_EXPORT int PyArray_AssignZero	(	PyArrayObject *	dst,
		PyArrayObject *	wheremask
	)

Fills an array with zeros.

dst: The destination array. wheremask: If non-NULL, a boolean mask specifying where to set the values.

Returns 0 on success, -1 on failure.

Create a raw bool scalar with the value False

NPY_NO_EXPORT int PyArray_FillWithScalar	(	PyArrayObject *	arr,
		PyObject *	obj
	)

If 'arr' is an object array, copy the object as is unless 'obj' is a zero-dimensional array, in which case we copy the element in that array instead.

NumPy scalar

Python boolean

Python integer

Try long long before unsigned long long

Long long failed, try unsigned long long

Long long succeeded

Python float

Python complex

Use the value pointer we got if possible

TODO: switch to SAME_KIND casting

Otherwise convert to an array to do the assignment

The dtype of the destination is used when converting from the pyobject, so that for example a tuple gets recognized as a struct scalar of the required type.

References NPY_LONGLONG, NPY_ULONGLONG, and PyArray_DescrFromType().

NPY_NO_EXPORT PyObject* PyArray_NewCopy	(	PyArrayObject *	obj,
		NPY_ORDER	order
	)

Copy an array.

Referenced by _bad_strides(), and cblas_matrixproduct().

NPY_NO_EXPORT int PyArray_ToFile	(	PyArrayObject *	self,
		FILE *	fp,
		char *	sep,
		char *	format
	)

XXX: FIXME --- add ordering argument to

Allow Fortran ordering on write This will need the addition of a Fortran-order iterator.

To File

binary data

For zero-width data types there's nothing to write

text data

standard writing

use format string

write separator for all but last one

NPY_NO_EXPORT PyObject* PyArray_ToList

(

PyArrayObject *

self

)

To List

References NPY_LIST_PICKLE, PyArray_DESCR, and PyDataType_FLAGCHK.

NPY_NO_EXPORT PyObject* PyArray_ToString	(	PyArrayObject *	self,
		NPY_ORDER	order
	)

if (PyArray_TYPE(self) == NPY_OBJECT) {

PyErr_SetString(PyExc_ValueError, "a string for the data" "in an object array is not appropriate"); return NULL; }

iterators are always in C-order

NPY_NO_EXPORT PyObject* PyArray_View	(	PyArrayObject *	self,
		PyArray_Descr *	type,
		PyTypeObject *	pytype
	)

View

steals a reference to type -- accepts NULL

2016-09-19, 1.12

Only warn once per array

Set the base object

static PyObject* recursive_tolist	(	PyArrayObject *	self,
		char *	dataptr,
		int	startdim
	)		[static]

Converts a subarray of 'self' into lists, with starting data pointer 'dataptr' and from dimension 'startdim' to the last dimension of 'self'.

Returns a new reference.

Base case