mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-30 03:47:57 +00:00
Bastian Köcher
e3e651f72c
* Happy new year Updates the copyright years and fixes wrong license headers. * Fix the template * Split HEADER into HEADER-APACHE & HEADER-GPL
31 lines
1.1 KiB
Rust
31 lines
1.1 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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use std::ops::Range;
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/// Construct a range from an offset to a data length after the offset.
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/// Returns None if the end of the range would exceed some maximum offset.
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pub fn checked_range(offset: usize, len: usize, max: usize) -> Option<Range<usize>> {
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let end = offset.checked_add(len)?;
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if end <= max {
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Some(offset..end)
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} else {
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None
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}
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}
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