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#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include "structmember.h"
#define _MULTIARRAYMODULE
#define NPY_NO_PREFIX
#include "numpy/arrayobject.h"
#include "numpy/arrayscalars.h"
#include "arrayobject.h"
#include "arraymapping.h"
#include "arraysequence.h"
/*************************************************************************
**************** Implement Sequence Protocol **************************
*************************************************************************/
/* Some of this is repeated in the array_as_mapping protocol. But
we fill it in here so that PySequence_XXXX calls work as expected
*/
static PyObject *
array_slice(PyArrayObject *self, Py_ssize_t ilow,
Py_ssize_t ihigh)
{
PyArrayObject *r;
Py_ssize_t l;
char *data;
if (self->nd == 0) {
PyErr_SetString(PyExc_ValueError, "cannot slice a 0-d array");
return NULL;
}
l=self->dimensions[0];
if (ilow < 0) {
ilow = 0;
}
else if (ilow > l) {
ilow = l;
}
if (ihigh < ilow) {
ihigh = ilow;
}
else if (ihigh > l) {
ihigh = l;
}
if (ihigh != ilow) {
data = index2ptr(self, ilow);
if (data == NULL) {
return NULL;
}
}
else {
data = self->data;
}
self->dimensions[0] = ihigh-ilow;
Py_INCREF(self->descr);
r = (PyArrayObject *) \
PyArray_NewFromDescr(self->ob_type, self->descr,
self->nd, self->dimensions,
self->strides, data,
self->flags, (PyObject *)self);
self->dimensions[0] = l;
if (r == NULL) {
return NULL;
}
r->base = (PyObject *)self;
Py_INCREF(self);
PyArray_UpdateFlags(r, UPDATE_ALL);
return (PyObject *)r;
}
static int
array_ass_slice(PyArrayObject *self, Py_ssize_t ilow,
Py_ssize_t ihigh, PyObject *v) {
int ret;
PyArrayObject *tmp;
if (v == NULL) {
PyErr_SetString(PyExc_ValueError,
"cannot delete array elements");
return -1;
}
if (!PyArray_ISWRITEABLE(self)) {
PyErr_SetString(PyExc_RuntimeError,
"array is not writeable");
return -1;
}
if ((tmp = (PyArrayObject *)array_slice(self, ilow, ihigh)) == NULL) {
return -1;
}
ret = PyArray_CopyObject(tmp, v);
Py_DECREF(tmp);
return ret;
}
static int
array_contains(PyArrayObject *self, PyObject *el)
{
/* equivalent to (self == el).any() */
PyObject *res;
int ret;
res = PyArray_EnsureAnyArray(PyObject_RichCompare((PyObject *)self,
el, Py_EQ));
if (res == NULL) {
return -1;
}
ret = array_any_nonzero((PyArrayObject *)res);
Py_DECREF(res);
return ret;
}
NPY_NO_EXPORT PySequenceMethods array_as_sequence = {
#if PY_VERSION_HEX >= 0x02050000
(lenfunc)array_length, /*sq_length*/
(binaryfunc)NULL, /*sq_concat is handled by nb_add*/
(ssizeargfunc)NULL,
(ssizeargfunc)array_item_nice,
(ssizessizeargfunc)array_slice,
(ssizeobjargproc)array_ass_item, /*sq_ass_item*/
(ssizessizeobjargproc)array_ass_slice, /*sq_ass_slice*/
(objobjproc) array_contains, /*sq_contains */
(binaryfunc) NULL, /*sg_inplace_concat */
(ssizeargfunc)NULL,
#else
(inquiry)array_length, /*sq_length*/
(binaryfunc)NULL, /*sq_concat is handled by nb_add*/
(intargfunc)NULL, /*sq_repeat is handled nb_multiply*/
(intargfunc)array_item_nice, /*sq_item*/
(intintargfunc)array_slice, /*sq_slice*/
(intobjargproc)array_ass_item, /*sq_ass_item*/
(intintobjargproc)array_ass_slice, /*sq_ass_slice*/
(objobjproc) array_contains, /*sq_contains */
(binaryfunc) NULL, /*sg_inplace_concat */
(intargfunc) NULL /*sg_inplace_repeat */
#endif
};
/****************** End of Sequence Protocol ****************************/
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