Function wasmer_c_api::wasm_c_api::module::wasm_module_exports

#[no_mangle]
pub unsafe extern "C" fn wasm_module_exports(
    module: &wasm_module_t,
    out: &mut wasm_exporttype_vec_t,
)

Returns an array of the exported types in the module.

The order of the exports is guaranteed to be the same as in the WebAssembly bytecode.

Example

int main() {
    // Create the engine and the store.
    wasm_engine_t* engine = wasm_engine_new();
    wasm_store_t* store = wasm_store_new(engine);

    // Create a WebAssembly module from a WAT definition.
    wasm_byte_vec_t wat;
    wasmer_byte_vec_new_from_string(
        &wat,
        "(module\n"
        "  (func (export \"function\") (param i32 i64))\n"
        "  (global (export \"global\") i32 (i32.const 7))\n"
        "  (table (export \"table\") 0 funcref)\n"
        "  (memory (export \"memory\") 1))"
    );
    wasm_byte_vec_t wasm;
    wat2wasm(&wat, &wasm);

    // Create the module.
    wasm_module_t* module = wasm_module_new(store, &wasm);
    assert(module);

    // Extract the types exported by this module.
    wasm_exporttype_vec_t export_types;
    wasm_module_exports(module, &export_types);

    // We have 4 of them.
    assert(export_types.size == 4);

    // The first one is a function. Use
    // `wasm_externtype_as_functype_const` to continue to inspect the
    // type.
    {
        wasm_exporttype_t* export_type = export_types.data[0];

        const wasm_name_t* export_name = wasm_exporttype_name(export_type);
        wasmer_assert_name(export_name, "function");

        const wasm_externtype_t* extern_type = wasm_exporttype_type(export_type);
        assert(wasm_externtype_kind(extern_type) == WASM_EXTERN_FUNC);
    }

    // The second one is a global. Use
    // `wasm_externtype_as_globaltype_const` to continue to inspect the
    // type.
    {
        wasm_exporttype_t* export_type = export_types.data[1];

        const wasm_name_t* export_name = wasm_exporttype_name(export_type);
        wasmer_assert_name(export_name, "global");

        const wasm_externtype_t* extern_type = wasm_exporttype_type(export_type);
        assert(wasm_externtype_kind(extern_type) == WASM_EXTERN_GLOBAL);
    }

    // The third one is a table. Use
    // `wasm_externtype_as_tabletype_const` to continue to inspect the
    // type.
    {
        wasm_exporttype_t* export_type = export_types.data[2];

        const wasm_name_t* export_name = wasm_exporttype_name(export_type);
        wasmer_assert_name(export_name, "table");

        const wasm_externtype_t* extern_type = wasm_exporttype_type(export_type);
        assert(wasm_externtype_kind(extern_type) == WASM_EXTERN_TABLE);
    }

    // The fourth one is a memory. Use
    // `wasm_externtype_as_memorytype_const` to continue to inspect the
    // type.
    {
        wasm_exporttype_t* export_type = export_types.data[3];

        const wasm_name_t* export_name = wasm_exporttype_name(export_type);
        wasmer_assert_name(export_name, "memory");

        const wasm_externtype_t* extern_type = wasm_exporttype_type(export_type);
        assert(wasm_externtype_kind(extern_type) == WASM_EXTERN_MEMORY);
    }

    // Free everything.
    wasm_exporttype_vec_delete(&export_types);
    wasm_byte_vec_delete(&wasm);
    wasm_byte_vec_delete(&wat);
    wasm_module_delete(module);
    wasm_store_delete(store);
    wasm_engine_delete(engine);

    return 0;
}