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arraytypes.c.src
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arraytypes.c.src
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/* -*- c -*- */
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <structmember.h>
#include <limits.h>
#include <assert.h>
#define NPY_NO_DEPRECATED_API NPY_API_VERSION
#define _MULTIARRAYMODULE
#define _UMATHMODULE
#define _NPY_NO_DEPRECATIONS /* for NPY_CHAR */
#include "numpy/npy_common.h"
#include "numpy/arrayobject.h"
#include "numpy/arrayscalars.h"
#include "npy_pycompat.h"
#include "numpy/npy_math.h"
#include "numpy/halffloat.h"
#include "npy_config.h"
#include "npy_sort.h"
#include "common.h"
#include "ctors.h"
#include "dtypemeta.h"
#include "lowlevel_strided_loops.h"
#include "usertypes.h"
#include "_datetime.h"
#include "arrayobject.h"
#include "alloc.h"
#include "typeinfo.h"
#include "npy_longdouble.h"
#include "numpyos.h"
#include <string.h>
#include "cblasfuncs.h"
#include "npy_cblas.h"
#include "npy_buffer.h"
#include "arraytypes.h"
#include "umathmodule.h"
/*
* Define a stack allocated dummy array with only the minimum information set:
* 1. The descr, the main field interesting here.
* 2. The flags, which are needed for alignment;.
* 3. The type is set to NULL and the base is the original array, if this
* is used within a subarray getitem to create a new view, the base
* must be walked until the type is not NULL.
*
* The following should create errors in debug mode (if deallocated
* incorrectly), since base would be incorrectly decref'd as well.
* This is especially important for nonzero and copyswap, which may run with
* the GIL released.
*/
static NPY_INLINE PyArrayObject_fields
get_dummy_stack_array(PyArrayObject *orig)
{
PyArrayObject_fields new_fields;
new_fields.flags = PyArray_FLAGS(orig);
/* Set to NULL so the dummy object can be distinguished from the real one */
Py_SET_TYPE(&new_fields, NULL);
new_fields.base = (PyObject *)orig;
return new_fields;
}
/* check for sequences, but ignore the types numpy considers scalars */
static NPY_INLINE npy_bool
PySequence_NoString_Check(PyObject *op) {
return
PySequence_Check(op) &&
!PyBytes_Check(op) &&
!PyUnicode_Check(op) &&
!PyArray_IsZeroDim(op);
}
/*
*****************************************************************************
** PYTHON TYPES TO C TYPES **
*****************************************************************************
*/
static double
MyPyFloat_AsDouble(PyObject *obj)
{
double ret = 0;
PyObject *num;
if (obj == Py_None) {
return NPY_NAN;
}
num = PyNumber_Float(obj);
if (num == NULL) {
return NPY_NAN;
}
ret = PyFloat_AS_DOUBLE(num);
Py_DECREF(num);
return ret;
}
static float
MyPyFloat_AsFloat(PyObject *obj)
{
double d_val = MyPyFloat_AsDouble(obj);
float res = (float)d_val;
if (NPY_UNLIKELY(npy_isinf(res) && !npy_isinf(d_val))) {
if (PyUFunc_GiveFloatingpointErrors("cast", NPY_FPE_OVERFLOW) < 0) {
return -1;
}
}
return res;
}
static npy_half
MyPyFloat_AsHalf(PyObject *obj)
{
double d_val = MyPyFloat_AsDouble(obj);
npy_half res = npy_double_to_half(d_val);
if (NPY_UNLIKELY(npy_half_isinf(res) && !npy_isinf(d_val))) {
if (PyUFunc_GiveFloatingpointErrors("cast", NPY_FPE_OVERFLOW) < 0) {
return npy_double_to_half(-1.);
}
}
return res;
}
static PyObject *
MyPyFloat_FromHalf(npy_half h)
{
return PyFloat_FromDouble(npy_half_to_double(h));
}
/* Handle case of assigning from an array scalar in setitem */
static int
convert_to_scalar_and_retry(PyObject *op, void *ov, void *vap,
int (*setitem)(PyObject *op, void *ov, void *vap))
{
PyObject *temp;
assert(PyArray_IsZeroDim(op));
temp = PyArray_ToScalar(PyArray_BYTES((PyArrayObject *)op),
(PyArrayObject *)op);
if (temp == NULL) {
return -1;
}
else {
int res = setitem(temp, ov, vap);
Py_DECREF(temp);
return res;
}
}
/**begin repeat
*
* #Type = Long, LongLong#
* #type = npy_long, npy_longlong#
*/
static @type@
MyPyLong_As@Type@ (PyObject *obj)
{
@type@ ret;
PyObject *num = PyNumber_Long(obj);
if (num == NULL) {
return -1;
}
ret = PyLong_As@Type@(num);
Py_DECREF(num);
return ret;
}
/**end repeat**/
/**begin repeat
*
* #Type = Long, LongLong#
* #type = npy_ulong, npy_ulonglong#
*/
static @type@
MyPyLong_AsUnsigned@Type@ (PyObject *obj)
{
@type@ ret;
PyObject *num = PyNumber_Long(obj);
if (num == NULL) {
return -1;
}
ret = PyLong_AsUnsigned@Type@(num);
if (PyErr_Occurred()) {
PyErr_Clear();
ret = PyLong_As@Type@(num);
}
Py_DECREF(num);
return ret;
}
/**end repeat**/
/*
*****************************************************************************
** GETITEM AND SETITEM **
*****************************************************************************
*/
#define _ALIGN(type) offsetof(struct {char c; type v;}, v)
/*
* Disable harmless compiler warning "4116: unnamed type definition in
* parentheses" which is caused by the _ALIGN macro.
*/
#if defined(_MSC_VER)
#pragma warning(disable:4116)
#endif
/**begin repeat
*
* #TYPE = BOOL, BYTE, UBYTE, SHORT, USHORT, INT, LONG, UINT, ULONG,
* LONGLONG, ULONGLONG, HALF, FLOAT, DOUBLE#
* #func1 = PyBool_FromLong, PyLong_FromLong*6, PyLong_FromUnsignedLong*2,
* PyLong_FromLongLong, PyLong_FromUnsignedLongLong,
* MyPyFloat_FromHalf, PyFloat_FromDouble*2#
* #func2 = PyObject_IsTrue, MyPyLong_AsLong*6, MyPyLong_AsUnsignedLong*2,
* MyPyLong_AsLongLong, MyPyLong_AsUnsignedLongLong,
* MyPyFloat_AsHalf, MyPyFloat_AsFloat, MyPyFloat_AsDouble#
* #type = npy_bool,
* npy_byte, npy_ubyte, npy_short, npy_ushort, npy_int,
* npy_long, npy_uint, npy_ulong, npy_longlong, npy_ulonglong,
* npy_half, npy_float, npy_double#
* #type1 = long*7, npy_ulong*2, npy_longlong, npy_ulonglong,
* npy_half, npy_float, npy_double#
* #kind = Bool, Byte, UByte, Short, UShort, Int, Long, UInt, ULong,
* LongLong, ULongLong, Half, Float, Double#
*/
static PyObject *
@TYPE@_getitem(void *input, void *vap)
{
PyArrayObject *ap = vap;
char *ip = input;
@type@ t1;
if ((ap == NULL) || PyArray_ISBEHAVED_RO(ap)) {
t1 = *((@type@ *)ip);
return @func1@((@type1@)t1);
}
else {
PyArray_DESCR(ap)->f->copyswap(&t1, ip, PyArray_ISBYTESWAPPED(ap), ap);
return @func1@((@type1@)t1);
}
}
static int
@TYPE@_setitem(PyObject *op, void *ov, void *vap)
{
PyArrayObject *ap = vap;
@type@ temp; /* ensures alignment */
if (PyArray_IsScalar(op, @kind@)) {
temp = PyArrayScalar_VAL(op, @kind@);
}
else {
temp = (@type@)@func2@(op);
}
if (PyErr_Occurred()) {
PyObject *type, *value, *traceback;
PyErr_Fetch(&type, &value, &traceback);
if (PySequence_NoString_Check(op)) {
PyErr_SetString(PyExc_ValueError,
"setting an array element with a sequence.");
npy_PyErr_ChainExceptionsCause(type, value, traceback);
}
else {
PyErr_Restore(type, value, traceback);
}
return -1;
}
if (ap == NULL || PyArray_ISBEHAVED(ap)) {
assert(npy_is_aligned(ov, _ALIGN(@type@)));
*((@type@ *)ov)=temp;
}
else {
PyArray_DESCR(ap)->f->copyswap(ov, &temp, PyArray_ISBYTESWAPPED(ap),
ap);
}
return 0;
}
/**end repeat**/
/**begin repeat
*
* #TYPE = CFLOAT, CDOUBLE#
* #type = npy_float, npy_double#
*/
static PyObject *
@TYPE@_getitem(void *input, void *vap)
{
PyArrayObject *ap = vap;
char *ip = input;
@type@ t1, t2;
if ((ap == NULL) || PyArray_ISBEHAVED_RO(ap)) {
return PyComplex_FromDoubles((double)((@type@ *)ip)[0],
(double)((@type@ *)ip)[1]);
}
else {
int size = sizeof(@type@);
npy_bool swap = PyArray_ISBYTESWAPPED(ap);
copy_and_swap(&t1, ip, size, 1, 0, swap);
copy_and_swap(&t2, ip + size, size, 1, 0, swap);
return PyComplex_FromDoubles((double)t1, (double)t2);
}
}
/**end repeat**/
/**begin repeat
*
* #NAME = CFLOAT, CDOUBLE, CLONGDOUBLE#
* #type = npy_cfloat, npy_cdouble, npy_clongdouble#
* #ftype = npy_float, npy_double, npy_longdouble#
* #kind = CFloat, CDouble, CLongDouble#
*/
static int
@NAME@_setitem(PyObject *op, void *ov, void *vap)
{
PyArrayObject *ap = vap;
Py_complex oop;
@type@ temp;
int rsize;
if (PyArray_IsZeroDim(op)) {
return convert_to_scalar_and_retry(op, ov, vap, @NAME@_setitem);
}
if (PyArray_IsScalar(op, @kind@)){
temp = PyArrayScalar_VAL(op, @kind@);
}
else {
if (op == Py_None) {
oop.real = NPY_NAN;
oop.imag = NPY_NAN;
}
else if (PyBytes_Check(op) || PyUnicode_Check(op)) {
/*
* Unlike most numeric conversion functions PyComplex_AsCComplex
* does not handle strings, so we have to use its constructor.
*/
PyObject *pycomplex, *args;
if (PyBytes_Check(op)) {
/* The complex constructor expects unicode */
PyObject *unicode;
unicode = PyUnicode_FromEncodedObject(op, NULL, NULL);
if (unicode == NULL) {
return -1;
}
args = PyTuple_Pack(1, unicode);
Py_DECREF(unicode);
}
else {
args = PyTuple_Pack(1, op);
}
if (args == NULL) {
return -1;
}
pycomplex = PyComplex_Type.tp_new(&PyComplex_Type, args, NULL);
Py_DECREF(args);
if (pycomplex == NULL) {
return -1;
}
oop = PyComplex_AsCComplex(pycomplex);
Py_DECREF(pycomplex);
if (error_converting(oop.real)) {
return -1;
}
}
else {
oop = PyComplex_AsCComplex(op);
if (error_converting(oop.real)) {
return -1;
}
}
temp.real = (@ftype@) oop.real;
temp.imag = (@ftype@) oop.imag;
#if NPY_SIZEOF_@NAME@ < NPY_SIZEOF_CDOUBLE /* really just float... */
/* Overflow could have occured converting double to float */
if (NPY_UNLIKELY((npy_isinf(temp.real) && !npy_isinf(oop.real)) ||
(npy_isinf(temp.imag) && !npy_isinf(oop.imag)))) {
if (PyUFunc_GiveFloatingpointErrors("cast", NPY_FPE_OVERFLOW) < 0) {
return -1;
}
}
#endif
}
memcpy(ov, &temp, PyArray_DESCR(ap)->elsize);
if (PyArray_ISBYTESWAPPED(ap)) {
byte_swap_vector(ov, 2, sizeof(@ftype@));
}
rsize = sizeof(@ftype@);
copy_and_swap(ov, &temp, rsize, 2, rsize, PyArray_ISBYTESWAPPED(ap));
return 0;
}
/**end repeat**/
static NPY_INLINE npy_longdouble
string_to_long_double(PyObject*op)
{
char *s;
char *end;
npy_longdouble temp;
PyObject* b;
/* Convert python long objects to a longdouble, without precision or range
* loss via a double.
*/
if ((PyLong_Check(op) && !PyBool_Check(op))) {
return npy_longdouble_from_PyLong(op);
}
if (PyUnicode_Check(op)) {
b = PyUnicode_AsUTF8String(op);
if (!b) {
return 0;
}
}
else {
b = op;
Py_XINCREF(b);
}
s = PyBytes_AsString(b);
if (s) {
errno = 0;
temp = NumPyOS_ascii_strtold(s, &end);
if (errno == ERANGE) {
if (PyErr_Warn(PyExc_RuntimeWarning,
"overflow encountered in conversion from string") < 0) {
Py_XDECREF(b);
return 0;
}
/* strtold returns INFINITY of the correct sign. */
}
else if (errno) {
PyErr_Format(PyExc_ValueError,
"invalid literal for long double: %s (%s)",
s,
strerror(errno));
Py_XDECREF(b);
return 0;
}
/* Extra characters at the end of the string, or nothing parsed */
if (end == s || *end) {
PyErr_Format(PyExc_ValueError,
"invalid literal for long double: %s",
s);
Py_XDECREF(b);
return 0;
}
Py_XDECREF(b);
}
else {
/* Probably wasn't a string, try converting it via a python double */
PyErr_Clear();
Py_XDECREF(b);
temp = (npy_longdouble) MyPyFloat_AsDouble(op);
}
return temp;
}
/*
* These return array scalars which are different than other date-types.
*/
static PyObject *
LONGDOUBLE_getitem(void *ip, void *ap)
{
return PyArray_Scalar(ip, PyArray_DESCR((PyArrayObject *)ap), NULL);
}
static int
LONGDOUBLE_setitem(PyObject *op, void *ov, void *vap)
{
PyArrayObject *ap = vap;
/* ensure alignment */
npy_longdouble temp;
if (PyArray_IsZeroDim(op)) {
return convert_to_scalar_and_retry(op, ov, vap, LONGDOUBLE_setitem);
}
if (PyArray_IsScalar(op, LongDouble)) {
temp = PyArrayScalar_VAL(op, LongDouble);
}
else {
/* In case something funny happened in PyArray_IsScalar */
if (PyErr_Occurred()) {
return -1;
}
temp = string_to_long_double(op);
}
if (PyErr_Occurred()) {
return -1;
}
if (ap == NULL || PyArray_ISBEHAVED(ap)) {
*((npy_longdouble *)ov) = temp;
}
else {
copy_and_swap(ov, &temp, PyArray_DESCR(ap)->elsize, 1, 0,
PyArray_ISBYTESWAPPED(ap));
}
return 0;
}
static PyObject *
CLONGDOUBLE_getitem(void *ip, void *ap)
{
return PyArray_Scalar(ip, PyArray_DESCR((PyArrayObject *)ap), NULL);
}
/* UNICODE */
static PyObject *
UNICODE_getitem(void *ip, void *vap)
{
PyArrayObject *ap = vap;
Py_ssize_t size = PyArray_ITEMSIZE(ap);
int swap = PyArray_ISBYTESWAPPED(ap);
int align = !PyArray_ISALIGNED(ap);
return (PyObject *)PyUnicode_FromUCS4(ip, size, swap, align);
}
static int
UNICODE_setitem(PyObject *op, void *ov, void *vap)
{
PyArrayObject *ap = vap;
if (PyArray_IsZeroDim(op)) {
return convert_to_scalar_and_retry(op, ov, vap, UNICODE_setitem);
}
if (PySequence_NoString_Check(op)) {
PyErr_SetString(PyExc_ValueError,
"setting an array element with a sequence");
return -1;
}
PyObject *temp;
if (PyBytes_Check(op)) {
/* Try to decode from ASCII */
temp = PyUnicode_FromEncodedObject(op, "ASCII", "strict");
if (temp == NULL) {
return -1;
}
}
else if ((temp=PyObject_Str(op)) == NULL) {
return -1;
}
/* truncate if needed */
Py_ssize_t max_len = PyArray_DESCR(ap)->elsize >> 2;
Py_ssize_t actual_len = PyUnicode_GetLength(temp);
if (actual_len < 0) {
Py_DECREF(temp);
return -1;
}
if (actual_len > max_len) {
Py_SETREF(temp, PyUnicode_Substring(temp, 0, max_len));
if (temp == NULL) {
return -1;
}
actual_len = max_len;
}
Py_ssize_t num_bytes = actual_len * 4;
char *buffer;
if (!PyArray_ISALIGNED(ap)) {
buffer = PyArray_malloc(num_bytes);
if (buffer == NULL) {
Py_DECREF(temp);
PyErr_NoMemory();
return -1;
}
}
else {
buffer = ov;
}
if (PyUnicode_AsUCS4(temp, (Py_UCS4 *)buffer, actual_len, 0) == NULL) {
PyArray_free(buffer);
Py_DECREF(temp);
return -1;
}
if (!PyArray_ISALIGNED(ap)) {
memcpy(ov, buffer, num_bytes);
PyArray_free(buffer);
}
/* Fill in the rest of the space with 0 */
if (PyArray_DESCR(ap)->elsize > num_bytes) {
memset((char*)ov + num_bytes, 0, (PyArray_DESCR(ap)->elsize - num_bytes));
}
if (PyArray_ISBYTESWAPPED(ap)) {
byte_swap_vector(ov, actual_len, 4);
}
Py_DECREF(temp);
return 0;
}
/* STRING
*
* can handle both NULL-terminated and not NULL-terminated cases
* will truncate all ending NULLs in returned string.
*/
static PyObject *
STRING_getitem(void *ip, void *vap)
{
PyArrayObject *ap = vap;
/* Will eliminate NULLs at the end */
char *ptr;
int size = PyArray_DESCR(ap)->elsize;
ptr = (char *)ip + size - 1;
while (size > 0 && *ptr-- == '\0') {
size--;
}
return PyBytes_FromStringAndSize(ip,size);
}
static int
STRING_setitem(PyObject *op, void *ov, void *vap)
{
PyArrayObject *ap = vap;
char *ptr;
Py_ssize_t len;
PyObject *temp = NULL;
if (PyArray_IsZeroDim(op)) {
return convert_to_scalar_and_retry(op, ov, vap, STRING_setitem);
}
if (PySequence_NoString_Check(op)) {
PyErr_SetString(PyExc_ValueError,
"setting an array element with a sequence");
return -1;
}
if (PyUnicode_Check(op)) {
/* Assume ASCII codec -- function similarly as Python 2 */
temp = PyUnicode_AsASCIIString(op);
if (temp == NULL) {
return -1;
}
}
else if (PyBytes_Check(op) || PyMemoryView_Check(op)) {
temp = PyObject_Bytes(op);
if (temp == NULL) {
return -1;
}
}
else {
/* Emulate similar casting behavior as on Python 2 */
PyObject *str;
str = PyObject_Str(op);
if (str == NULL) {
return -1;
}
temp = PyUnicode_AsASCIIString(str);
Py_DECREF(str);
if (temp == NULL) {
return -1;
}
}
if (PyBytes_AsStringAndSize(temp, &ptr, &len) < 0) {
Py_DECREF(temp);
return -1;
}
memcpy(ov, ptr, PyArray_MIN(PyArray_DESCR(ap)->elsize,len));
/*
* If string length is smaller than room in array
* Then fill the rest of the element size with NULL
*/
if (PyArray_DESCR(ap)->elsize > len) {
memset((char *)ov + len, 0, (PyArray_DESCR(ap)->elsize - len));
}
Py_DECREF(temp);
return 0;
}
/* OBJECT */
#define __ALIGNED(obj, sz) ((((size_t) obj) % (sz))==0)
static PyObject *
OBJECT_getitem(void *ip, void *NPY_UNUSED(ap))
{
PyObject *obj;
memcpy(&obj, ip, sizeof(obj));
if (obj == NULL) {
/* We support NULL, but still try to guarantee this never happens! */
Py_RETURN_NONE;
}
else {
Py_INCREF(obj);
return obj;
}
}
static int
OBJECT_setitem(PyObject *op, void *ov, void *NPY_UNUSED(ap))
{
PyObject *obj;
memcpy(&obj, ov, sizeof(obj));
Py_INCREF(op);
/* A newly created array/buffer may only be NULLed, so XDECREF */
Py_XDECREF(obj);
memcpy(ov, &op, sizeof(op));
return PyErr_Occurred() ? -1 : 0;
}
/* VOID */
static PyObject *
VOID_getitem(void *input, void *vap)
{
PyArrayObject *ap = vap;
char *ip = input;
PyArray_Descr* descr = PyArray_DESCR(vap);
if (PyDataType_HASFIELDS(descr)) {
PyObject *key;
PyObject *names;
int i, n;
PyObject *ret;
PyObject *tup;
PyArrayObject_fields dummy_fields = get_dummy_stack_array(ap);
PyArrayObject *dummy_arr = (PyArrayObject *)&dummy_fields;
/* get the names from the fields dictionary*/
names = descr->names;
n = PyTuple_GET_SIZE(names);
ret = PyTuple_New(n);
for (i = 0; i < n; i++) {
npy_intp offset;
PyArray_Descr *new;
key = PyTuple_GET_ITEM(names, i);
tup = PyDict_GetItem(descr->fields, key);
if (_unpack_field(tup, &new, &offset) < 0) {
Py_DECREF(ret);
return NULL;
}
dummy_fields.descr = new;
/* update alignment based on offset */
if ((new->alignment > 1)
&& ((((npy_intp)(ip+offset)) % new->alignment) != 0)) {
PyArray_CLEARFLAGS(dummy_arr, NPY_ARRAY_ALIGNED);
}
else {
PyArray_ENABLEFLAGS(dummy_arr, NPY_ARRAY_ALIGNED);
}
PyTuple_SET_ITEM(ret, i, PyArray_GETITEM(dummy_arr, ip+offset));
}
return ret;
}
if (descr->subarray) {
/* return an array of the basic type */
PyArray_Dims shape = {NULL, -1};
PyArrayObject *ret;
if (!(PyArray_IntpConverter(descr->subarray->shape, &shape))) {
npy_free_cache_dim_obj(shape);
PyErr_SetString(PyExc_ValueError,
"invalid shape in fixed-type tuple.");
return NULL;
}
Py_INCREF(descr->subarray->base);
/*
* NOTE: There is the possibility of recursive calls from the above
* field branch. These calls use a dummy arr for thread
* (and general) safety. However, we must set the base array,
* so if such a dummy array was passed (its type is NULL),
* we have walk its base until the initial array is found.
*
* TODO: This should be fixed, the next "generation" of GETITEM will
* probably need to pass in the original array (in addition
* to the dtype as a method). Alternatively, VOID dtypes
* could have special handling.
*/
PyObject *base = (PyObject *)ap;
while (base != NULL && Py_TYPE(base) == NULL) {
base = PyArray_BASE((PyArrayObject *)base);
}
ret = (PyArrayObject *)PyArray_NewFromDescrAndBase(
&PyArray_Type, descr->subarray->base,
shape.len, shape.ptr, NULL, ip,
PyArray_FLAGS(ap) & ~NPY_ARRAY_F_CONTIGUOUS,
NULL, base);
if (base == NULL) {
/*
* Need to create a copy, or we may point to wrong data. This path
* is taken when no "valid" array is passed. This happens for
* casts.
*/
PyObject *copy = PyArray_FromArray(ret, NULL, NPY_ARRAY_ENSURECOPY);
Py_SETREF(ret, (PyArrayObject *)copy);
}
npy_free_cache_dim_obj(shape);
return (PyObject *)ret;
}
return PyBytes_FromStringAndSize(ip, descr->elsize);
}
NPY_NO_EXPORT int PyArray_CopyObject(PyArrayObject *, PyObject *);
/* Given a structured PyArrayObject arr, index i and structured datatype descr,
* modify the dtype of arr to contain a single field corresponding to the ith
* field of descr, recompute the alignment flag, and return the offset of the
* field (in offset_p). This is useful in preparation for calling copyswap on
* individual fields of a numpy structure, in VOID_setitem. Compare to inner
* loops in VOID_getitem and VOID_nonzero.
*
* WARNING: Clobbers arr's dtype and alignment flag, should not be used
* on the original array!
*/
NPY_NO_EXPORT int
_setup_field(int i, PyArray_Descr *descr, PyArrayObject *arr,
npy_intp *offset_p, char *dstdata)
{
PyObject *key;
PyObject *tup;
PyArray_Descr *new;
npy_intp offset;
key = PyTuple_GET_ITEM(descr->names, i);
tup = PyDict_GetItem(descr->fields, key);
if (_unpack_field(tup, &new, &offset) < 0) {
return -1;
}
((PyArrayObject_fields *)(arr))->descr = new;
if ((new->alignment > 1) &&
((((uintptr_t)dstdata + offset) % new->alignment) != 0)) {
PyArray_CLEARFLAGS(arr, NPY_ARRAY_ALIGNED);
}
else {
PyArray_ENABLEFLAGS(arr, NPY_ARRAY_ALIGNED);
}
*offset_p = offset;
return 0;
}
/* Helper function for VOID_setitem, which uses the copyswap or casting code to
* copy structured datatypes between numpy arrays or scalars.
*/
static int
_copy_and_return_void_setitem(PyArray_Descr *dstdescr, char *dstdata,
PyArray_Descr *srcdescr, char *srcdata){
PyArrayObject_fields dummy_struct;
PyArrayObject *dummy_arr = (PyArrayObject *)&dummy_struct;
npy_int names_size = PyTuple_GET_SIZE(dstdescr->names);
npy_intp offset;
npy_int i;
int ret;
/* Fast path if dtypes are equal */
if (PyArray_EquivTypes(srcdescr, dstdescr)) {
for (i = 0; i < names_size; i++) {
/* neither line can ever fail, in principle */
if (_setup_field(i, dstdescr, dummy_arr, &offset, dstdata)) {
return -1;
}
PyArray_DESCR(dummy_arr)->f->copyswap(dstdata + offset,
srcdata + offset, 0, dummy_arr);
}
return 0;
}
/* Slow path */
ret = PyArray_CastRawArrays(1, srcdata, dstdata, 0, 0,
srcdescr, dstdescr, 0);
if (ret != NPY_SUCCEED) {
return -1;
}
return 0;
}
static int
VOID_setitem(PyObject *op, void *input, void *vap)
{
char *ip = input;
PyArrayObject *ap = vap;
int itemsize = PyArray_DESCR(ap)->elsize;
int res;
PyArray_Descr *descr = PyArray_DESCR(ap);
if (PyDataType_HASFIELDS(descr)) {
PyObject *errmsg;
npy_int i;
npy_intp offset;
int failed = 0;
/* If op is 0d-ndarray or numpy scalar, directly get dtype & data ptr */
if (PyArray_Check(op)) {
PyArrayObject *oparr = (PyArrayObject *)op;
if (PyArray_SIZE(oparr) != 1) {
PyErr_SetString(PyExc_ValueError,
"setting an array element with a sequence.");
return -1;
}
return _copy_and_return_void_setitem(descr, ip,
PyArray_DESCR(oparr), PyArray_DATA(oparr));
}
else if (PyArray_IsScalar(op, Void)) {
PyArray_Descr *srcdescr = ((PyVoidScalarObject *)op)->descr;
char *srcdata = ((PyVoidScalarObject *)op)->obval;
return _copy_and_return_void_setitem(descr, ip, srcdescr, srcdata);
}
else if (PyTuple_Check(op)) {
/* if it's a tuple, copy field-by-field to ap, */
npy_intp names_size = PyTuple_GET_SIZE(descr->names);
if (names_size != PyTuple_Size(op)) {
errmsg = PyUnicode_FromFormat(
"could not assign tuple of length %zd to structure "
"with %" NPY_INTP_FMT " fields.",
PyTuple_Size(op), names_size);
PyErr_SetObject(PyExc_ValueError, errmsg);
Py_DECREF(errmsg);
return -1;
}
PyArrayObject_fields dummy_fields = get_dummy_stack_array(ap);
PyArrayObject *dummy_arr = (PyArrayObject *)&dummy_fields;
for (i = 0; i < names_size; i++) {
PyObject *item;
if (_setup_field(i, descr, dummy_arr, &offset, ip) == -1) {
failed = 1;
break;
}
item = PyTuple_GetItem(op, i);
if (item == NULL) {
failed = 1;
break;
}
/* use setitem to set this field */
if (PyArray_SETITEM(dummy_arr, ip + offset, item) < 0) {
failed = 1;
break;
}
}
}
else {
/* Otherwise must be non-void scalar. Try to assign to each field */
npy_intp names_size = PyTuple_GET_SIZE(descr->names);
PyArrayObject_fields dummy_fields = get_dummy_stack_array(ap);
PyArrayObject *dummy_arr = (PyArrayObject *)&dummy_fields;
for (i = 0; i < names_size; i++) {
/* temporarily make ap have only this field */
if (_setup_field(i, descr, dummy_arr, &offset, ip) == -1) {
failed = 1;
break;
}
/* use setitem to set this field */
if (PyArray_SETITEM(dummy_arr, ip + offset, op) < 0) {
failed = 1;
break;
}
}
}
if (failed) {
return -1;
}
return 0;
}
else if (PyDataType_HASSUBARRAY(descr)) {