mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-23 04:12:02 +00:00
111 lines
4.7 KiB
C++
111 lines
4.7 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <stratosphere.hpp>
|
|
|
|
namespace ams::util {
|
|
|
|
namespace {
|
|
|
|
struct UuidImpl {
|
|
util::BitPack32 data[4];
|
|
|
|
using TimeLow = util::BitPack32::Field<0, BITSIZEOF(u32), u32>;
|
|
|
|
using TimeMid = util::BitPack32::Field<0, BITSIZEOF(u16), u16>;
|
|
using TimeHighAndVersion = util::BitPack32::Field<TimeMid::Next, BITSIZEOF(u16), u16>;
|
|
using Version = util::BitPack32::Field<TimeMid::Next + 12, 4, u16>;
|
|
|
|
static_assert(TimeHighAndVersion::Next == Version::Next);
|
|
|
|
using ClockSeqHiAndReserved = util::BitPack32::Field<0, BITSIZEOF(u8), u8>;
|
|
using Reserved = util::BitPack32::Field<6, 2, u8>;
|
|
using ClockSeqLow = util::BitPack32::Field<ClockSeqHiAndReserved::Next, BITSIZEOF(u8), u8>;
|
|
using NodeLow = util::BitPack32::Field<ClockSeqLow::Next, BITSIZEOF(u16), u16>;
|
|
|
|
static_assert(ClockSeqHiAndReserved::Next == Reserved::Next);
|
|
|
|
using NodeHigh = util::BitPack32::Field<0, BITSIZEOF(u32), u32>;
|
|
|
|
|
|
inline Uuid Convert() const {
|
|
/* Convert the fields from native endian to big endian. */
|
|
util::BitPack32 converted[4] = {util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}};
|
|
|
|
converted[0].Set<TimeLow>(util::ConvertToBigEndian(this->data[0].Get<TimeLow>()));
|
|
|
|
converted[1].Set<TimeMid>(util::ConvertToBigEndian(this->data[1].Get<TimeMid>()));
|
|
converted[1].Set<TimeHighAndVersion>(util::ConvertToBigEndian(this->data[1].Get<TimeHighAndVersion>()));
|
|
|
|
|
|
converted[2].Set<ClockSeqHiAndReserved>(util::ConvertToBigEndian(this->data[2].Get<ClockSeqHiAndReserved>()));
|
|
converted[2].Set<ClockSeqLow>(util::ConvertToBigEndian(this->data[2].Get<ClockSeqLow>()));
|
|
|
|
u64 node_lo = static_cast<u64>(this->data[2].Get<NodeLow>());
|
|
u64 node_hi = static_cast<u64>(this->data[3].Get<NodeHigh>());
|
|
u64 node = util::ConvertToBigEndian48(static_cast<u64>((node_hi << BITSIZEOF(u16)) | (node_lo)));
|
|
|
|
constexpr u64 NodeLoMask = (UINT64_C(1) << BITSIZEOF(u16)) - 1u;
|
|
constexpr u64 NodeHiMask = (UINT64_C(1) << BITSIZEOF(u32)) - 1u;
|
|
|
|
converted[2].Set<NodeLow>(static_cast<u16>(node & NodeLoMask));
|
|
converted[3].Set<NodeHigh>(static_cast<u32>((node >> BITSIZEOF(u16)) & NodeHiMask));
|
|
|
|
Uuid uuid;
|
|
std::memcpy(uuid.data, converted, sizeof(uuid.data));
|
|
return uuid;
|
|
}
|
|
};
|
|
static_assert(sizeof(UuidImpl) == sizeof(Uuid));
|
|
|
|
ALWAYS_INLINE Uuid GenerateUuidVersion4() {
|
|
constexpr u16 Version = 0x4;
|
|
constexpr u8 Reserved = 0x1;
|
|
|
|
/* Generate a random uuid. */
|
|
UuidImpl uuid = {util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}};
|
|
os::GenerateRandomBytes(uuid.data, sizeof(uuid.data));
|
|
|
|
/* Set version and reserved. */
|
|
uuid.data[1].Set<UuidImpl::Version>(Version);
|
|
uuid.data[2].Set<UuidImpl::Reserved>(Reserved);
|
|
|
|
/* Return the uuid. */
|
|
return uuid.Convert();
|
|
}
|
|
|
|
}
|
|
|
|
Uuid GenerateUuid() {
|
|
return GenerateUuidVersion4();
|
|
}
|
|
|
|
Uuid GenerateUuidVersion5(const void *sha1_hash) {
|
|
constexpr u16 Version = 0x5;
|
|
constexpr u8 Reserved = 0x1;
|
|
|
|
/* Generate a uuid from a SHA1 hash. */
|
|
UuidImpl uuid = {util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}, util::BitPack32{0}};
|
|
std::memcpy(uuid.data, sha1_hash, sizeof(uuid.data));
|
|
|
|
/* Set version and reserved. */
|
|
uuid.data[1].Set<UuidImpl::Version>(Version);
|
|
uuid.data[2].Set<UuidImpl::Reserved>(Reserved);
|
|
|
|
/* Return the uuid. */
|
|
return uuid.Convert();
|
|
}
|
|
|
|
}
|