// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![no_std]
#![no_main]

use common::input;
use uapi::{HostFn, HostFnImpl as api, StorageFlags};

static mut BUFFER: [u8; 16 * 1024 + 1] = [0u8; 16 * 1024 + 1];

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn deploy() {}

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn call() {
	input!(len: u32, );

	let data = unsafe {
		&BUFFER[..len as usize]
	};

	// Place a garbage value in storage, the size of which is specified by the call input.
	let mut key = [0u8; 32];
	key[0] = 1;

	api::set_storage(StorageFlags::empty(), &key, data);

	let data = unsafe {
		&mut &mut BUFFER[..]
	};
	api::get_storage(StorageFlags::empty(), &key, data).unwrap();
	assert_eq!(data.len(), len as usize);
}