Function npy_uint_alignment

numpy/core/src/multiarray/common.h:217–246

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

/* Get equivalent "uint" alignment given an itemsize, for use in copy code */
static inline npy_uintp
npy_uint_alignment(int itemsize)
{
    npy_uintp alignment = 0; /* return value of 0 means unaligned */

    switch(itemsize){
        case 1:
            return 1;
        case 2:
            alignment = NPY_ALIGNOF(npy_uint16);
            break;
        case 4:
            alignment = NPY_ALIGNOF(npy_uint32);
            break;
        case 8:
            alignment = NPY_ALIGNOF(npy_uint64);
            break;
        case 16:
            /*
             * 16 byte types are copied using 2 uint64 assignments.
             * See the strided copy function in lowlevel_strided_loops.c.
             */
            alignment = NPY_ALIGNOF(npy_uint64);
            break;
        default:
            break;
    }

    return alignment;
}

/*
 * memchr with stride and invert argument