example-native-api-rs/src/lib.rs

mod addin1;
mod addin2;
mod ffi;

use std::{
    ffi::{c_int, c_long, c_void},
    sync::atomic::{AtomicI32, Ordering},
};

use addin1::Addin1;
use ffi::{destroy_component, AttachType};
use utf16_lit::utf16_null;

use crate::{addin2::Addin2, ffi::create_component};

pub static mut PLATFORM_CAPABILITIES: AtomicI32 = AtomicI32::new(-1);

#[allow(non_snake_case)]
#[no_mangle]
pub unsafe extern "C" fn GetClassObject(name: *const u16, component: *mut *mut c_void) -> c_long {
    match *name as u8 {
        b'1' => {
            let addin = Addin1::new();
            create_component(component, addin)
        }
        b'2' => {
            let addin = Addin2::new();
            create_component(component, addin)
        }
        _ => 0,
    }
}

#[allow(non_snake_case)]
#[no_mangle]
pub unsafe extern "C" fn DestroyObject(component: *mut *mut c_void) -> c_long {
    destroy_component(component)
}

#[allow(non_snake_case)]
#[no_mangle]
pub extern "C" fn GetClassNames() -> *const u16 {
    // small strings for performance
    utf16_null!("1|2").as_ptr()
}

#[allow(non_snake_case)]
#[no_mangle]
pub extern "C" fn SetPlatformCapabilities(capabilities: c_int) -> c_int {
    unsafe {
        PLATFORM_CAPABILITIES.store(capabilities, Ordering::Relaxed);
    }
    3
}

#[allow(non_snake_case)]
#[no_mangle]
pub extern "C" fn GetAttachType() -> AttachType {
    AttachType::CanAttachAny
}