ohos-web-binding 0.1.1

OpenHarmony's web binding for rust
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#[macro_export]
macro_rules! ark_web_member_exists {
    ($s:expr, $f:ident) => {
        unsafe {
            let s_ptr = $s as *const _ as *const u8;
            let f_ptr = &((*$s).$f) as *const _ as *const u8;
            let f_size = std::mem::size_of_val(&((*$s).$f));
            let offset = f_ptr as usize - s_ptr as usize;

            // 访问结构体的size字段，假设它是第一个字段
            let struct_size = *(s_ptr as *const usize);

            (offset + f_size <= struct_size)
        }
    };
}

#[macro_export]
macro_rules! ark_web_member_missing {
    ($s:expr, $f:ident) => {
        (!crate::ark_web_member_exists!($s, $f) || unsafe { !((*$s).$f).is_some() })
    };
}