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#[doc(hidden)]
#[macro_export]
macro_rules! deref_ptr {
    ($cfg: ident, $ret: expr) => {{
        if $cfg.is_null() {
            return $ret;
        } else {
            &*$cfg
        }
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! deref_ptr_mut {
    ($cfg: ident, $ret: expr) => {{
        if $cfg.is_null() {
            return $ret;
        } else {
            &mut *$cfg
        }
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! get_slice {
    ($buff: expr, $buff_size: expr) => {{
        std::slice::from_raw_parts($buff, $buff_size).to_owned()
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! get_slice_mut {
    ($buff: expr, $buff_size: expr) => {{
        std::slice::from_raw_parts_mut($buff, $buff_size)
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! get_string {
    ($ptr: expr) => {{
        String::from_utf8(CStr::from_ptr($ptr).to_bytes().to_vec()).unwrap()
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! get_value_or_errno {
    ($val: expr) => {{
        match $val {
            Ok(v) => v,
            Err(errno) => return errno,
        }
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! get_value_or_false {
    ($val: expr) => {{
        match $val {
            Ok(v) => v,
            Err(_) => return 0,
        }
    }};
}