Function PyArray_Scalar

numpy/core/src/multiarray/scalarapi.c:621–768

Does nothing with descr (cannot be NULL) */ NUMPY_API Get scalar-equivalent to a region of memory described by a descriptor. */

  Get scalar-equivalent to a region of memory described by a descriptor.
*/
NPY_NO_EXPORT PyObject *
PyArray_Scalar(void *data, PyArray_Descr *descr, PyObject *base)
{
    PyTypeObject *type;
    PyObject *obj;
    void *destptr;
    PyArray_CopySwapFunc *copyswap;
    int type_num;
    int itemsize;
    int swap;

    type_num = descr->type_num;
    if (type_num == NPY_BOOL) {
        PyArrayScalar_RETURN_BOOL_FROM_LONG(*(npy_bool*)data);
    }
    else if (PyDataType_FLAGCHK(descr, NPY_USE_GETITEM)) {
        return descr->f->getitem(data, base);
    }
    itemsize = descr->elsize;
    copyswap = descr->f->copyswap;
    type = descr->typeobj;
    swap = !PyArray_ISNBO(descr->byteorder);
    if (PyTypeNum_ISSTRING(type_num)) {
        /* Eliminate NULL bytes */
        char *dptr = data;

        dptr += itemsize - 1;
        while(itemsize && *dptr-- == 0) {
            itemsize--;
        }
        if (type_num == NPY_UNICODE && itemsize) {
            /*
             * make sure itemsize is a multiple of 4
             * so round up to nearest multiple
             */
            itemsize = (((itemsize - 1) >> 2) + 1) << 2;
        }
    }
    if (type_num == NPY_UNICODE) {
        /* we need the full string length here, else copyswap will write too
           many bytes */
        void *buff = PyArray_malloc(descr->elsize);
        if (buff == NULL) {
            return PyErr_NoMemory();
        }
        /* copyswap needs an array object, but only actually cares about the
         * dtype
         */
        PyArrayObject_fields dummy_arr;
        if (base == NULL) {
            dummy_arr.descr = descr;
            base = (PyObject *)&dummy_arr;
        }
        copyswap(buff, data, swap, base);

        /* truncation occurs here */
        PyObject *u = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND, buff, itemsize / 4);
        PyArray_free(buff);