Struct isn't working with FFI

[grumpOldman]

Struct isn't working with FFI

I'm trying to create a SDL2 package, but Structs I generated from SDL_Events are not working with Window Events.

They worked with byte-type version 0.1.7 looking at divy/deno_sdl2. I even tested updating divy/deno_sdl2 to the lastest version 0.4.0 and still not spitting out SDL_WindowEvents.

It might be an issue switching from UnsafePointerView to DataView

[MierenManz]

I'm not 100% sure what you are requesting?

Do you want a Ptr<T> class which is a sugarcoat around reading pointers in byte type?

const ptrAB = Deno.UnsafePointerView.getArrayBuffer(ptr, size, offset);
const dt = new DataView(ptrAB);

return UnsizedType.read(dt);

Or do you want help with how to create a DataView from PointerValue / PointerObject?

Example of how you can do it

const lib = Deno.dlopen("./libree.so", {
    ret_ptr: {
        parameters: ["u8", "u32"],
        result: "pointer",
    },
    // Essentially the same as above
    ret_buff: {
        name: "ret_ptr",
        parameters: ["u8", "u32"],
        result: "buffer",
    },
});

const ptr = lib.symbols.ret_ptr(8, 32);

// Assume ptr is not null
const ptrArrayBuff = Deno.UnsafePointerView.getArrayBuffer(ptr!, size, offset);
const ptrDataview = new DataView(ptrArrayBuff);

Or directly from a result that is a struct

const lib = Deno.dlopen("./libree.so", {
    ret_struct: {
        parameters: ["u8", "u32"],
        result: { struct: ["u8", "u32"] },
    },
});

const struct = lib.symbols.ret_struct(8, 32);
const structDataview = new DataView(struct.buffer);