Function PyArrayMethod_FromSpec_int

numpy/core/src/multiarray/array_method.c:420–479

* Create a new ArrayMethod (internal version). * * @param name A name for the individual method, may be NULL. * @param spec A filled context object to pass generic information about * the method (such as usually needing the API, and the DTypes). * Unused fields must be NULL. * @param slots Slots with the correct pair of IDs and (function) pointers. * @param private Some slots

 * @returns A new (bound) ArrayMethod object.
 */
NPY_NO_EXPORT PyBoundArrayMethodObject *
PyArrayMethod_FromSpec_int(PyArrayMethod_Spec *spec, int private)
{
    int nargs = spec->nin + spec->nout;

    if (spec->name == NULL) {
        spec->name = "<unknown>";
    }

    if (validate_spec(spec) < 0) {
        return NULL;
    }

    PyBoundArrayMethodObject *res;
    res = PyObject_New(PyBoundArrayMethodObject, &PyBoundArrayMethod_Type);
    if (res == NULL) {
        return NULL;
    }
    res->method = NULL;

    res->dtypes = PyMem_Malloc(sizeof(PyArray_DTypeMeta *) * nargs);
    if (res->dtypes == NULL) {
        Py_DECREF(res);
        PyErr_NoMemory();
        return NULL;
    }
    for (int i = 0; i < nargs ; i++) {
        Py_XINCREF(spec->dtypes[i]);
        res->dtypes[i] = spec->dtypes[i];
    }

    res->method = PyObject_New(PyArrayMethodObject, &PyArrayMethod_Type);
    if (res->method == NULL) {
        Py_DECREF(res);
        PyErr_NoMemory();
        return NULL;
    }
    memset((char *)(res->method) + sizeof(PyObject), 0,
           sizeof(PyArrayMethodObject) - sizeof(PyObject));

    res->method->nin = spec->nin;
    res->method->nout = spec->nout;
    res->method->flags = spec->flags;
    res->method->casting = spec->casting;
    if (fill_arraymethod_from_slots(res, spec, private) < 0) {
        Py_DECREF(res);
        return NULL;
    }

    Py_ssize_t length = strlen(spec->name);
    res->method->name = PyMem_Malloc(length + 1);
    if (res->method->name == NULL) {
        Py_DECREF(res);
        PyErr_NoMemory();
        return NULL;
    }
    strcpy(res->method->name, spec->name);