Source of H5Ocopy.c - hdf5_ep

 
            oh_dst->flags |= H5O_HDR_CHUNK0_8;
        else if(dst_oh_size > 65535)
            oh_dst->flags |= H5O_HDR_CHUNK0_4;
        else if(dst_oh_size > 255)
            oh_dst->flags |= H5O_HDR_CHUNK0_2;
    } /* end if */
​
    /* Check if the chunk's data portion is too small */
    dst_oh_gap = dst_oh_null = 0;
    if(dst_oh_size < H5O_MIN_SIZE) {
        size_t delta = (H5O_MIN_SIZE - dst_oh_size);    /* Delta in chunk size needed */
        size_t delta = (size_t)(H5O_MIN_SIZE - dst_oh_size);    /* Delta in chunk size needed */
​
        /* Sanity check */
        HDassert((oh_dst->flags & H5O_HDR_CHUNK0_SIZE) == H5O_HDR_CHUNK0_1);
​
        /* Determine whether to create gap or NULL message */
        if(delta < H5O_SIZEOF_MSGHDR_OH(oh_dst))
            dst_oh_gap = delta;
        else
            dst_oh_null = delta;
​