Function npy_is_aligned

numpy/core/src/multiarray/common.h:203–214

* return true if pointer is aligned to 'alignment' */

 * return true if pointer is aligned to 'alignment'
 */
static inline int
npy_is_aligned(const void * p, const npy_uintp alignment)
{
    /*
     * Assumes alignment is a power of two, as required by the C standard.
     * Assumes cast from pointer to uintp gives a sensible representation we
     * can use bitwise & on (not required by C standard, but used by glibc).
     * This test is faster than a direct modulo.
     * Note alignment value of 0 is allowed and returns False.
     */
    return ((npy_uintp)(p) & ((alignment) - 1)) == 0;
}

/* Get equivalent "uint" alignment given an itemsize, for use in copy code */
static inline npy_uintp