1// Copyright (c) 2025-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_UTIL_BYTE_UNITS_H
6#define BITCOIN_UTIL_BYTE_UNITS_H
7
8#include <util/overflow.h>
9
10#include <limits>
11#include <stdexcept>
12
13namespace util::detail {
14template <unsigned SHIFT>
15consteval uint64_t ByteUnitsToBytes(unsigned long long units)
16{
17    const auto bytes{CheckedLeftShift(units, SHIFT)};
18    if (!bytes || *bytes > std::numeric_limits<uint64_t>::max()) {
19        throw std::overflow_error("Too large");
20    }
21    return *bytes;
22}
23} // namespace util::detail
24
25/// Conversion of MiB to bytes.
26consteval uint64_t operator""_MiB(unsigned long long mebibytes)
27{
28    return util::detail::ByteUnitsToBytes<20>(mebibytes);
29}
30
31/// Conversion of GiB to bytes.
32consteval uint64_t operator""_GiB(unsigned long long gibibytes)
33{
34    return util::detail::ByteUnitsToBytes<30>(gibibytes);
35}
36
37#endif // BITCOIN_UTIL_BYTE_UNITS_H
38