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author | khvostikovao <khvostikovao@yandex-team.ru> | 2022-02-10 16:52:06 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:52:06 +0300 |
commit | 06189cb2ee513c85b125b5bd1c879a5a4f05ca77 (patch) | |
tree | b1d025e74b437ef31f6dcfde01766663c842197b | |
parent | e1eef5fd2ea964227b9be2c182415857c35e1290 (diff) | |
download | ydb-06189cb2ee513c85b125b5bd1c879a5a4f05ca77.tar.gz |
Restoring authorship annotation for <khvostikovao@yandex-team.ru>. Commit 1 of 2.
-rw-r--r-- | util/generic/guid.cpp | 34 | ||||
-rw-r--r-- | util/generic/guid.h | 12 | ||||
-rw-r--r-- | util/generic/guid_ut.cpp | 12 |
3 files changed, 29 insertions, 29 deletions
diff --git a/util/generic/guid.cpp b/util/generic/guid.cpp index 8b907457bc..ef023aa5e2 100644 --- a/util/generic/guid.cpp +++ b/util/generic/guid.cpp @@ -48,23 +48,23 @@ void CreateGuid(TGUID* res) { WriteUnaligned<ui64>(&dw[1], RandomNumber<ui64>()); } -TGUID TGUID::CreateTimebased() { - TGUID result; - // GUID_EPOCH_OFFSET is the number of 100-ns intervals between the - // UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00. - constexpr ui64 GUID_EPOCH_OFFSET = 0x01b21dd213814000; - const ui64 timestamp = Now().NanoSeconds() / 100 + GUID_EPOCH_OFFSET; - result.dw[0] = ui32(timestamp & 0xffffffff); // time low - const ui32 timeMid = ui32((timestamp >> 32) & 0xffff); - constexpr ui32 UUID_VERSION = 1; - const ui32 timeHighAndVersion = ui16((timestamp >> 48) & 0x0fff) | (UUID_VERSION << 12); - result.dw[1] = (timeMid << 16) | timeHighAndVersion; - const ui32 clockSeq = RandomNumber<ui32>(0x3fff) | 0x8000; - result.dw[2] = (clockSeq << 16) | RandomNumber<ui16>(); - result.dw[3] = RandomNumber<ui32>() | (1 << 24); - return result; -} - +TGUID TGUID::CreateTimebased() { + TGUID result; + // GUID_EPOCH_OFFSET is the number of 100-ns intervals between the + // UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00. + constexpr ui64 GUID_EPOCH_OFFSET = 0x01b21dd213814000; + const ui64 timestamp = Now().NanoSeconds() / 100 + GUID_EPOCH_OFFSET; + result.dw[0] = ui32(timestamp & 0xffffffff); // time low + const ui32 timeMid = ui32((timestamp >> 32) & 0xffff); + constexpr ui32 UUID_VERSION = 1; + const ui32 timeHighAndVersion = ui16((timestamp >> 48) & 0x0fff) | (UUID_VERSION << 12); + result.dw[1] = (timeMid << 16) | timeHighAndVersion; + const ui32 clockSeq = RandomNumber<ui32>(0x3fff) | 0x8000; + result.dw[2] = (clockSeq << 16) | RandomNumber<ui16>(); + result.dw[3] = RandomNumber<ui32>() | (1 << 24); + return result; +} + TString GetGuidAsString(const TGUID& g) { return g.AsGuidString(); } diff --git a/util/generic/guid.h b/util/generic/guid.h index 2bf6c8ad99..8267935bcc 100644 --- a/util/generic/guid.h +++ b/util/generic/guid.h @@ -36,12 +36,12 @@ struct TGUID { TString AsUuidString() const; static TGUID Create(); - - /** - * Generate time based UUID version 1 RFC4122 GUID - * https://datatracker.ietf.org/doc/html/rfc4122#section-4.1 - **/ - static TGUID CreateTimebased(); + + /** + * Generate time based UUID version 1 RFC4122 GUID + * https://datatracker.ietf.org/doc/html/rfc4122#section-4.1 + **/ + static TGUID CreateTimebased(); }; constexpr bool operator==(const TGUID& a, const TGUID& b) noexcept { diff --git a/util/generic/guid_ut.cpp b/util/generic/guid_ut.cpp index 048354ff39..a8fb32ea5f 100644 --- a/util/generic/guid_ut.cpp +++ b/util/generic/guid_ut.cpp @@ -119,10 +119,10 @@ Y_UNIT_TEST_SUITE(TGuidTest) { UNIT_ASSERT_VALUES_EQUAL(guid.AsGuidString(), "5612-12000000-123-0"); UNIT_ASSERT_VALUES_EQUAL(guid.AsUuidString(), "00005612-1200-0000-0000-012300000000"); } - - Y_UNIT_TEST(TimeBased) { - TString guid = TGUID::CreateTimebased().AsUuidString(); - UNIT_ASSERT(!guid.empty()); - UNIT_ASSERT_EQUAL(guid[14], '1'); - } + + Y_UNIT_TEST(TimeBased) { + TString guid = TGUID::CreateTimebased().AsUuidString(); + UNIT_ASSERT(!guid.empty()); + UNIT_ASSERT_EQUAL(guid[14], '1'); + } } |