feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/frame/revive/fixtures/contracts/call_data_load.rs

@@ -0,0 +1,44 @@
+// 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.
+
+//! This uses the call data load API to first the first input byte.
+//! This single input byte is used as the offset for a second call
+//! to the call data load API.
+//! The output of the second API call is returned.
+
+#![no_std]
+#![no_main]
+include!("../panic_handler.rs");
+
+use uapi::{HostFn, HostFnImpl as api, ReturnFlags};
+
+#[no_mangle]
+#[polkavm_derive::polkavm_export]
+pub extern "C" fn deploy() {}
+
+#[no_mangle]
+#[polkavm_derive::polkavm_export]
+pub extern "C" fn call() {
+	let mut buf = [0; 32];
+	api::call_data_load(&mut buf, 0);
+
+	let offset = buf[31] as u32;
+	let mut buf = [0; 32];
+	api::call_data_load(&mut buf, offset);
+
+	api::return_value(ReturnFlags::empty(), &buf);
+}