sp_wasm_interface_common/
util.rs

1// This file is part of Gear.
2//
3// Copyright (C) 2021-2023 Gear Technologies Inc.
4// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
5//
6// This program is free software: you can redistribute it and/or modify
7// it under the terms of the GNU General Public License as published by
8// the Free Software Foundation, either version 3 of the License, or
9// (at your option) any later version.
10//
11// This program is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15//
16// You should have received a copy of the GNU General Public License
17// along with this program. If not, see <https://www.gnu.org/licenses/>.
18
19use core::ops::Range;
20
21/// Construct a range from an offset to a data length after the offset.
22/// Returns None if the end of the range would exceed some maximum offset.
23pub fn checked_range(offset: usize, len: usize, max: usize) -> Option<Range<usize>> {
24	let end = offset.checked_add(len)?;
25	(end <= max).then(|| offset..end)
26}
sp_wasm_interface_common/util.rs

sp_wasm_interface_common/
util.rs
