Function PyUnicode_FromUCS4

numpy/core/src/common/ucsnarrow.c:42–71

* Returns a PyUnicodeObject initialized from a buffer containing * UCS4 unicode. * * Parameters * ---------- * src: char * * Pointer to buffer containing UCS4 unicode. * size: Py_ssize_t * Size of buffer in bytes. * swap: int * If true, the data will be swapped. * align: int * If true, the data will be aligned. * * Returns * ------- * new_reference: PyUnicod

 * new_reference: PyUnicodeObject
 */
NPY_NO_EXPORT PyUnicodeObject *
PyUnicode_FromUCS4(char const *src_char, Py_ssize_t size, int swap, int align)
{
    Py_ssize_t ucs4len = size / sizeof(npy_ucs4);
    npy_ucs4 const *src = (npy_ucs4 const *)src_char;
    npy_ucs4 *buf = NULL;

    /* swap and align if needed */
    if (swap || align) {
        buf = (npy_ucs4 *)malloc(size);
        if (buf == NULL) {
            PyErr_NoMemory();
            return NULL;
        }
        memcpy(buf, src, size);
        if (swap) {
            byte_swap_vector(buf, ucs4len, sizeof(npy_ucs4));
        }
        src = buf;
    }

    /* trim trailing zeros */
    while (ucs4len > 0 && src[ucs4len - 1] == 0) {
        ucs4len--;
    }
    PyUnicodeObject *ret = (PyUnicodeObject *)PyUnicode_FromKindAndData(
        PyUnicode_4BYTE_KIND, src, ucs4len);
    free(buf);
    return ret;
}