From 0cccba62cfdb6ee9c04a6ec0199d46f91df89160 Mon Sep 17 00:00:00 2001
From: Vitaly Baranov <vitlibar@clickhouse.com>
Date: Sun, 25 Jun 2023 16:28:18 +0200
Subject: [PATCH] Support getHexUIntLowercase() with CityHash_v1_0_2::uint128
 parameter.

---
 base/base/hex.h                               | 424 ++++++++++--------
 src/Common/getHashOfLoadedBinary.cpp          |   2 +-
 src/Compression/CompressedReadBufferBase.cpp  |   4 +-
 .../DistributedAsyncInsertHeader.cpp          |   5 +-
 .../MergeTree/MergeTreeDataPartChecksum.cpp   |  14 +-
 .../PartMetadataManagerWithCache.cpp          |   8 +-
 src/Storages/StorageReplicatedMergeTree.cpp   |   3 +-
 src/Storages/System/StorageSystemParts.cpp    |   6 +-
 .../System/StorageSystemProjectionParts.cpp   |   6 +-
 utils/checksum-for-compressed-block/main.cpp  |   2 +-
 10 files changed, 267 insertions(+), 207 deletions(-)

diff --git a/base/base/hex.h b/base/base/hex.h
index b8cf95db893..0780e6159a1 100644
--- a/base/base/hex.h
+++ b/base/base/hex.h
@@ -4,212 +4,286 @@
 #include <cstring>
 #include "types.h"
 
-/// Maps 0..15 to 0..9A..F or 0..9a..f correspondingly.
+namespace CityHash_v1_0_2 { struct uint128; }
 
-constexpr inline std::string_view hex_digit_to_char_uppercase_table = "0123456789ABCDEF";
-constexpr inline std::string_view hex_digit_to_char_lowercase_table = "0123456789abcdef";
+namespace wide
+{
+    template <size_t Bits, typename Signed>
+    class integer;
+}
+
+namespace impl
+{
+    /// Maps 0..15 to 0..9A..F or 0..9a..f correspondingly.
+    constexpr inline std::string_view hex_digit_to_char_uppercase_table = "0123456789ABCDEF";
+    constexpr inline std::string_view hex_digit_to_char_lowercase_table = "0123456789abcdef";
+
+    /// Maps 0..255 to 00..FF or 00..ff correspondingly.
+    constexpr inline std::string_view hex_byte_to_char_uppercase_table = //
+        "000102030405060708090A0B0C0D0E0F"
+        "101112131415161718191A1B1C1D1E1F"
+        "202122232425262728292A2B2C2D2E2F"
+        "303132333435363738393A3B3C3D3E3F"
+        "404142434445464748494A4B4C4D4E4F"
+        "505152535455565758595A5B5C5D5E5F"
+        "606162636465666768696A6B6C6D6E6F"
+        "707172737475767778797A7B7C7D7E7F"
+        "808182838485868788898A8B8C8D8E8F"
+        "909192939495969798999A9B9C9D9E9F"
+        "A0A1A2A3A4A5A6A7A8A9AAABACADAEAF"
+        "B0B1B2B3B4B5B6B7B8B9BABBBCBDBEBF"
+        "C0C1C2C3C4C5C6C7C8C9CACBCCCDCECF"
+        "D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF"
+        "E0E1E2E3E4E5E6E7E8E9EAEBECEDEEEF"
+        "F0F1F2F3F4F5F6F7F8F9FAFBFCFDFEFF";
+
+    constexpr inline std::string_view hex_byte_to_char_lowercase_table = //
+        "000102030405060708090a0b0c0d0e0f"
+        "101112131415161718191a1b1c1d1e1f"
+        "202122232425262728292a2b2c2d2e2f"
+        "303132333435363738393a3b3c3d3e3f"
+        "404142434445464748494a4b4c4d4e4f"
+        "505152535455565758595a5b5c5d5e5f"
+        "606162636465666768696a6b6c6d6e6f"
+        "707172737475767778797a7b7c7d7e7f"
+        "808182838485868788898a8b8c8d8e8f"
+        "909192939495969798999a9b9c9d9e9f"
+        "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
+        "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
+        "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
+        "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
+        "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
+        "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
+
+    /// Maps 0..255 to 00000000..11111111 correspondingly.
+    constexpr inline std::string_view bin_byte_to_char_table = //
+        "0000000000000001000000100000001100000100000001010000011000000111"
+        "0000100000001001000010100000101100001100000011010000111000001111"
+        "0001000000010001000100100001001100010100000101010001011000010111"
+        "0001100000011001000110100001101100011100000111010001111000011111"
+        "0010000000100001001000100010001100100100001001010010011000100111"
+        "0010100000101001001010100010101100101100001011010010111000101111"
+        "0011000000110001001100100011001100110100001101010011011000110111"
+        "0011100000111001001110100011101100111100001111010011111000111111"
+        "0100000001000001010000100100001101000100010001010100011001000111"
+        "0100100001001001010010100100101101001100010011010100111001001111"
+        "0101000001010001010100100101001101010100010101010101011001010111"
+        "0101100001011001010110100101101101011100010111010101111001011111"
+        "0110000001100001011000100110001101100100011001010110011001100111"
+        "0110100001101001011010100110101101101100011011010110111001101111"
+        "0111000001110001011100100111001101110100011101010111011001110111"
+        "0111100001111001011110100111101101111100011111010111111001111111"
+        "1000000010000001100000101000001110000100100001011000011010000111"
+        "1000100010001001100010101000101110001100100011011000111010001111"
+        "1001000010010001100100101001001110010100100101011001011010010111"
+        "1001100010011001100110101001101110011100100111011001111010011111"
+        "1010000010100001101000101010001110100100101001011010011010100111"
+        "1010100010101001101010101010101110101100101011011010111010101111"
+        "1011000010110001101100101011001110110100101101011011011010110111"
+        "1011100010111001101110101011101110111100101111011011111010111111"
+        "1100000011000001110000101100001111000100110001011100011011000111"
+        "1100100011001001110010101100101111001100110011011100111011001111"
+        "1101000011010001110100101101001111010100110101011101011011010111"
+        "1101100011011001110110101101101111011100110111011101111011011111"
+        "1110000011100001111000101110001111100100111001011110011011100111"
+        "1110100011101001111010101110101111101100111011011110111011101111"
+        "1111000011110001111100101111001111110100111101011111011011110111"
+        "1111100011111001111110101111101111111100111111011111111011111111";
+
+    /// Maps 0..9, A..F, a..f to 0..15. Other chars are mapped to implementation specific value.
+    constexpr inline std::string_view hex_char_to_digit_table
+        = {"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\xff\xff\xff\xff\xff\xff" //0-9
+        "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //A-Z
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //a-z
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
+        256};
+
+    /// Converts a hex digit '0'..'f' or '0'..'F' to its value 0..15.
+    constexpr UInt8 unhexDigit(char c)
+    {
+        return hex_char_to_digit_table[static_cast<UInt8>(c)];
+    }
+
+    /// Converts an unsigned integer in the native endian to hexadecimal representation and back. Used as a base class for HexConversion<T>.
+    template <typename TUInt, typename = void>
+    struct HexConversionUInt
+    {
+        static const constexpr size_t num_hex_digits = sizeof(TUInt) * 2;
+
+        static void hex(TUInt uint_, char * out, std::string_view table)
+        {
+            union
+            {
+                TUInt value;
+                UInt8 uint8[sizeof(TUInt)];
+            };
+
+            value = uint_;
+
+            for (size_t i = 0; i < sizeof(TUInt); ++i)
+            {
+                if constexpr (std::endian::native == std::endian::little)
+                    memcpy(out + i * 2, &table[static_cast<size_t>(uint8[sizeof(TUInt) - 1 - i]) * 2], 2);
+                else
+                    memcpy(out + i * 2, &table[static_cast<size_t>(uint8[i]) * 2], 2);
+            }
+        }
+
+        static TUInt unhex(const char * data)
+        {
+            TUInt res;
+            if constexpr (sizeof(TUInt) == 1)
+            {
+                res = static_cast<UInt8>(unhexDigit(data[0])) * 0x10 + static_cast<UInt8>(unhexDigit(data[1]));
+            }
+            else if constexpr (sizeof(TUInt) == 2)
+            {
+                res = static_cast<UInt16>(unhexDigit(data[0])) * 0x1000 + static_cast<UInt16>(unhexDigit(data[1])) * 0x100
+                    + static_cast<UInt16>(unhexDigit(data[2])) * 0x10 + static_cast<UInt16>(unhexDigit(data[3]));
+            }
+            else if constexpr ((sizeof(TUInt) <= 8) || ((sizeof(TUInt) % 8) != 0))
+            {
+                res = 0;
+                for (size_t i = 0; i < sizeof(TUInt) * 2; ++i, ++data)
+                {
+                    res <<= 4;
+                    res += unhexDigit(*data);
+                }
+            }
+            else
+            {
+                res = 0;
+                for (size_t i = 0; i < sizeof(TUInt) / 8; ++i, data += 16)
+                {
+                    res <<= 64;
+                    res += HexConversionUInt<UInt64>::unhex(data);
+                }
+            }
+            return res;
+        }
+    };
+
+    /// Helper template class to convert a value of any supported type to hexadecimal representation and back.
+    template <typename T, typename = void>
+    struct HexConversion;
+
+    template <typename TUInt>
+    struct HexConversion<TUInt, std::enable_if_t<std::is_integral_v<TUInt>>> : public HexConversionUInt<TUInt> {};
+
+    template <size_t Bits, typename Signed>
+    struct HexConversion<wide::integer<Bits, Signed>> : public HexConversionUInt<wide::integer<Bits, Signed>> {};
+
+    template <typename CityHashUInt128>
+    struct HexConversion<CityHashUInt128, std::enable_if_t<std::is_same_v<CityHashUInt128, typename CityHash_v1_0_2::uint128>>>
+    {
+        static const constexpr size_t num_hex_digits = 32;
+
+        static void hex(const CityHashUInt128 & uint_, char * out, std::string_view table)
+        {
+            HexConversion<UInt64>::hex(uint_.high64, out, table);
+            HexConversion<UInt64>::hex(uint_.low64, out + 16, table);
+        }
+
+        static CityHashUInt128 unhex(const char * data)
+        {
+            CityHashUInt128 res;
+            res.high64 = HexConversion<UInt64>::unhex(data);
+            res.low64 = HexConversion<UInt64>::unhex(data + 16);
+            return res;
+        }
+    };
+}
+
+/// Produces a hexadecimal representation of an integer value with leading zeros (for checksums).
+/// The function supports native integer types, wide::integer, CityHash_v1_0_2::uint128.
+template <typename T>
+void writeHexUIntUppercase(const T & value, char * out)
+{
+    impl::HexConversion<T>::hex(value, out, impl::hex_byte_to_char_uppercase_table);
+}
+
+template <typename T>
+void writeHexUIntLowercase(const T & value, char * out)
+{
+    impl::HexConversion<T>::hex(value, out, impl::hex_byte_to_char_lowercase_table);
+}
+
+template <typename T>
+std::string getHexUIntUppercase(const T & value)
+{
+    std::string res(impl::HexConversion<T>::num_hex_digits, '\0');
+    writeHexUIntUppercase(value, res.data());
+    return res;
+}
+
+template <typename T>
+std::string getHexUIntLowercase(const T & value)
+{
+    std::string res(impl::HexConversion<T>::num_hex_digits, '\0');
+    writeHexUIntLowercase(value, res.data());
+    return res;
+}
 
 constexpr char hexDigitUppercase(unsigned char c)
 {
-    return hex_digit_to_char_uppercase_table[c];
+    return impl::hex_digit_to_char_uppercase_table[c];
 }
+
 constexpr char hexDigitLowercase(unsigned char c)
 {
-    return hex_digit_to_char_lowercase_table[c];
+    return impl::hex_digit_to_char_lowercase_table[c];
 }
 
-/// Maps 0..255 to 00..FF or 00..ff correspondingly
-
-constexpr inline std::string_view hex_byte_to_char_uppercase_table = //
-    "000102030405060708090A0B0C0D0E0F"
-    "101112131415161718191A1B1C1D1E1F"
-    "202122232425262728292A2B2C2D2E2F"
-    "303132333435363738393A3B3C3D3E3F"
-    "404142434445464748494A4B4C4D4E4F"
-    "505152535455565758595A5B5C5D5E5F"
-    "606162636465666768696A6B6C6D6E6F"
-    "707172737475767778797A7B7C7D7E7F"
-    "808182838485868788898A8B8C8D8E8F"
-    "909192939495969798999A9B9C9D9E9F"
-    "A0A1A2A3A4A5A6A7A8A9AAABACADAEAF"
-    "B0B1B2B3B4B5B6B7B8B9BABBBCBDBEBF"
-    "C0C1C2C3C4C5C6C7C8C9CACBCCCDCECF"
-    "D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF"
-    "E0E1E2E3E4E5E6E7E8E9EAEBECEDEEEF"
-    "F0F1F2F3F4F5F6F7F8F9FAFBFCFDFEFF";
-
-constexpr inline std::string_view hex_byte_to_char_lowercase_table = //
-    "000102030405060708090a0b0c0d0e0f"
-    "101112131415161718191a1b1c1d1e1f"
-    "202122232425262728292a2b2c2d2e2f"
-    "303132333435363738393a3b3c3d3e3f"
-    "404142434445464748494a4b4c4d4e4f"
-    "505152535455565758595a5b5c5d5e5f"
-    "606162636465666768696a6b6c6d6e6f"
-    "707172737475767778797a7b7c7d7e7f"
-    "808182838485868788898a8b8c8d8e8f"
-    "909192939495969798999a9b9c9d9e9f"
-    "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
-    "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
-    "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
-    "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
-    "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
-    "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
-
 inline void writeHexByteUppercase(UInt8 byte, void * out)
 {
-    memcpy(out, &hex_byte_to_char_uppercase_table[static_cast<size_t>(byte) * 2], 2);
+    memcpy(out, &impl::hex_byte_to_char_uppercase_table[static_cast<size_t>(byte) * 2], 2);
 }
 
 inline void writeHexByteLowercase(UInt8 byte, void * out)
 {
-    memcpy(out, &hex_byte_to_char_lowercase_table[static_cast<size_t>(byte) * 2], 2);
+    memcpy(out, &impl::hex_byte_to_char_lowercase_table[static_cast<size_t>(byte) * 2], 2);
 }
 
-constexpr inline std::string_view bin_byte_to_char_table = //
-    "0000000000000001000000100000001100000100000001010000011000000111"
-    "0000100000001001000010100000101100001100000011010000111000001111"
-    "0001000000010001000100100001001100010100000101010001011000010111"
-    "0001100000011001000110100001101100011100000111010001111000011111"
-    "0010000000100001001000100010001100100100001001010010011000100111"
-    "0010100000101001001010100010101100101100001011010010111000101111"
-    "0011000000110001001100100011001100110100001101010011011000110111"
-    "0011100000111001001110100011101100111100001111010011111000111111"
-    "0100000001000001010000100100001101000100010001010100011001000111"
-    "0100100001001001010010100100101101001100010011010100111001001111"
-    "0101000001010001010100100101001101010100010101010101011001010111"
-    "0101100001011001010110100101101101011100010111010101111001011111"
-    "0110000001100001011000100110001101100100011001010110011001100111"
-    "0110100001101001011010100110101101101100011011010110111001101111"
-    "0111000001110001011100100111001101110100011101010111011001110111"
-    "0111100001111001011110100111101101111100011111010111111001111111"
-    "1000000010000001100000101000001110000100100001011000011010000111"
-    "1000100010001001100010101000101110001100100011011000111010001111"
-    "1001000010010001100100101001001110010100100101011001011010010111"
-    "1001100010011001100110101001101110011100100111011001111010011111"
-    "1010000010100001101000101010001110100100101001011010011010100111"
-    "1010100010101001101010101010101110101100101011011010111010101111"
-    "1011000010110001101100101011001110110100101101011011011010110111"
-    "1011100010111001101110101011101110111100101111011011111010111111"
-    "1100000011000001110000101100001111000100110001011100011011000111"
-    "1100100011001001110010101100101111001100110011011100111011001111"
-    "1101000011010001110100101101001111010100110101011101011011010111"
-    "1101100011011001110110101101101111011100110111011101111011011111"
-    "1110000011100001111000101110001111100100111001011110011011100111"
-    "1110100011101001111010101110101111101100111011011110111011101111"
-    "1111000011110001111100101111001111110100111101011111011011110111"
-    "1111100011111001111110101111101111111100111111011111111011111111";
-
-inline void writeBinByte(UInt8 byte, void * out)
+/// Converts a hex representation with leading zeros back to an integer value.
+/// The function supports native integer types, wide::integer, CityHash_v1_0_2::uint128.
+template <typename T>
+constexpr T unhexUInt(const char * data)
 {
-    memcpy(out, &bin_byte_to_char_table[static_cast<size_t>(byte) * 8], 8);
+    return impl::HexConversion<T>::unhex(data);
 }
 
-/// Produces hex representation of an unsigned int with leading zeros (for checksums)
-template <typename TUInt>
-inline void writeHexUIntImpl(TUInt uint_, char * out, std::string_view table)
-{
-    union
-    {
-        TUInt value;
-        UInt8 uint8[sizeof(TUInt)];
-    };
-
-    value = uint_;
-
-    for (size_t i = 0; i < sizeof(TUInt); ++i)
-    {
-        if constexpr (std::endian::native == std::endian::little)
-            memcpy(out + i * 2, &table[static_cast<size_t>(uint8[sizeof(TUInt) - 1 - i]) * 2], 2);
-        else
-            memcpy(out + i * 2, &table[static_cast<size_t>(uint8[i]) * 2], 2);
-    }
-}
-
-template <typename TUInt>
-inline void writeHexUIntUppercase(TUInt uint_, char * out)
-{
-    writeHexUIntImpl(uint_, out, hex_byte_to_char_uppercase_table);
-}
-
-template <typename TUInt>
-inline void writeHexUIntLowercase(TUInt uint_, char * out)
-{
-    writeHexUIntImpl(uint_, out, hex_byte_to_char_lowercase_table);
-}
-
-template <typename TUInt>
-std::string getHexUIntUppercase(TUInt uint_)
-{
-    std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntUppercase(uint_, res.data());
-    return res;
-}
-
-template <typename TUInt>
-std::string getHexUIntLowercase(TUInt uint_)
-{
-    std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntLowercase(uint_, res.data());
-    return res;
-}
-
-/// Maps 0..9, A..F, a..f to 0..15. Other chars are mapped to implementation specific value.
-
-constexpr inline std::string_view hex_char_to_digit_table
-    = {"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\xff\xff\xff\xff\xff\xff" //0-9
-       "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //A-Z
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //a-z
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
-       256};
-
+/// Converts a hexadecimal digit '0'..'f' or '0'..'F' to UInt8.
 constexpr UInt8 unhex(char c)
 {
-    return hex_char_to_digit_table[static_cast<UInt8>(c)];
+    return impl::unhexDigit(c);
 }
 
+/// Converts two hexadecimal digits to UInt8.
 constexpr UInt8 unhex2(const char * data)
 {
-    return static_cast<UInt8>(unhex(data[0])) * 0x10 + static_cast<UInt8>(unhex(data[1]));
+    return unhexUInt<UInt8>(data);
 }
 
+/// Converts four hexadecimal digits to UInt16.
 constexpr UInt16 unhex4(const char * data)
 {
-    return static_cast<UInt16>(unhex(data[0])) * 0x1000 + static_cast<UInt16>(unhex(data[1])) * 0x100
-        + static_cast<UInt16>(unhex(data[2])) * 0x10 + static_cast<UInt16>(unhex(data[3]));
+    return unhexUInt<UInt16>(data);
 }
 
-template <typename TUInt>
-constexpr TUInt unhexUInt(const char * data)
+/// Produces a binary representation of a single byte.
+inline void writeBinByte(UInt8 byte, void * out)
 {
-    TUInt res = 0;
-    if constexpr ((sizeof(TUInt) <= 8) || ((sizeof(TUInt) % 8) != 0))
-    {
-        for (size_t i = 0; i < sizeof(TUInt) * 2; ++i, ++data)
-        {
-            res <<= 4;
-            res += unhex(*data);
-        }
-    }
-    else
-    {
-        for (size_t i = 0; i < sizeof(TUInt) / 8; ++i, data += 16)
-        {
-            res <<= 64;
-            res += unhexUInt<UInt64>(data);
-        }
-    }
-    return res;
+    memcpy(out, &impl::bin_byte_to_char_table[static_cast<size_t>(byte) * 8], 8);
 }
diff --git a/src/Common/getHashOfLoadedBinary.cpp b/src/Common/getHashOfLoadedBinary.cpp
index cc0ad0d2143..b81300b8536 100644
--- a/src/Common/getHashOfLoadedBinary.cpp
+++ b/src/Common/getHashOfLoadedBinary.cpp
@@ -37,7 +37,7 @@ SipHash getHashOfLoadedBinary()
 std::string getHashOfLoadedBinaryHex()
 {
     SipHash hash = getHashOfLoadedBinary();
-    std::array<UInt64, 2> checksum;
+    UInt128 checksum;
     hash.get128(checksum);
     return getHexUIntUppercase(checksum);
 }
diff --git a/src/Compression/CompressedReadBufferBase.cpp b/src/Compression/CompressedReadBufferBase.cpp
index bae52c8bece..dd19955d010 100644
--- a/src/Compression/CompressedReadBufferBase.cpp
+++ b/src/Compression/CompressedReadBufferBase.cpp
@@ -49,8 +49,8 @@ static void validateChecksum(char * data, size_t size, const Checksum expected_c
 
     /// TODO mess up of endianness in error message.
     message << "Checksum doesn't match: corrupted data."
-        " Reference: " + getHexUIntLowercase(expected_checksum.high64) + getHexUIntLowercase(expected_checksum.low64)
-        + ". Actual: " + getHexUIntLowercase(calculated_checksum.high64) + getHexUIntLowercase(calculated_checksum.low64)
+        " Reference: " + getHexUIntLowercase(expected_checksum)
+        + ". Actual: " + getHexUIntLowercase(calculated_checksum)
         + ". Size of compressed block: " + toString(size);
 
     const char * message_hardware_failure = "This is most likely due to hardware failure. "
diff --git a/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp b/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp
index e1b54304f23..a8ed89e66f1 100644
--- a/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp
+++ b/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp
@@ -39,9 +39,8 @@ DistributedAsyncInsertHeader DistributedAsyncInsertHeader::read(ReadBufferFromFi
         if (expected_checksum != calculated_checksum)
         {
             throw Exception(ErrorCodes::CHECKSUM_DOESNT_MATCH,
-                            "Checksum of extra info doesn't match: corrupted data. Reference: {}{}. Actual: {}{}.",
-                            getHexUIntLowercase(expected_checksum.high64), getHexUIntLowercase(expected_checksum.low64),
-                            getHexUIntLowercase(calculated_checksum.high64), getHexUIntLowercase(calculated_checksum.low64));
+                            "Checksum of extra info doesn't match: corrupted data. Reference: {}. Actual: {}.",
+                            getHexUIntLowercase(expected_checksum), getHexUIntLowercase(calculated_checksum));
         }
 
         /// Read the parts of the header.
diff --git a/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp b/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp
index 58ba7acb9ba..6628cd68eaf 100644
--- a/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp
+++ b/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp
@@ -307,19 +307,7 @@ static void updateHash(SipHash & hash, const std::string & data)
 /// Hash is the same as MinimalisticDataPartChecksums::hash_of_all_files
 String MergeTreeDataPartChecksums::getTotalChecksumHex() const
 {
-    SipHash hash_of_all_files;
-
-    for (const auto & [name, checksum] : files)
-    {
-        updateHash(hash_of_all_files, name);
-        hash_of_all_files.update(checksum.file_hash);
-    }
-
-    UInt64 lo;
-    UInt64 hi;
-    hash_of_all_files.get128(lo, hi);
-
-    return getHexUIntUppercase(hi) + getHexUIntUppercase(lo);
+    return getHexUIntUppercase(getTotalChecksumUInt128());
 }
 
 MergeTreeDataPartChecksums::Checksum::uint128 MergeTreeDataPartChecksums::getTotalChecksumUInt128() const
diff --git a/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp b/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp
index 324bd4bbaee..bb6462b3058 100644
--- a/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp
+++ b/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp
@@ -250,8 +250,8 @@ std::unordered_map<String, IPartMetadataManager::uint128> PartMetadataManagerWit
                     ErrorCodes::CORRUPTED_DATA,
                     "Checksums doesn't match in part {} for {}. Expected: {}. Found {}.",
                     part->name, file_path,
-                    getHexUIntUppercase(disk_checksum.high64) + getHexUIntUppercase(disk_checksum.low64),
-                    getHexUIntUppercase(cache_checksums[i].high64) + getHexUIntUppercase(cache_checksums[i].low64));
+                    getHexUIntUppercase(disk_checksum),
+                    getHexUIntUppercase(cache_checksums[i]));
 
             disk_checksums.push_back(disk_checksum);
             continue;
@@ -287,8 +287,8 @@ std::unordered_map<String, IPartMetadataManager::uint128> PartMetadataManagerWit
                 ErrorCodes::CORRUPTED_DATA,
                 "Checksums doesn't match in projection part {} {}. Expected: {}. Found {}.",
                 part->name, proj_name,
-                getHexUIntUppercase(disk_checksum.high64) + getHexUIntUppercase(disk_checksum.low64),
-                getHexUIntUppercase(cache_checksums[i].high64) + getHexUIntUppercase(cache_checksums[i].low64));
+                getHexUIntUppercase(disk_checksum),
+                getHexUIntUppercase(cache_checksums[i]));
         disk_checksums.push_back(disk_checksum);
     }
     return results;
diff --git a/src/Storages/StorageReplicatedMergeTree.cpp b/src/Storages/StorageReplicatedMergeTree.cpp
index b1ba06c77f9..a2138efdf56 100644
--- a/src/Storages/StorageReplicatedMergeTree.cpp
+++ b/src/Storages/StorageReplicatedMergeTree.cpp
@@ -2891,8 +2891,7 @@ void StorageReplicatedMergeTree::cloneReplica(const String & source_replica, Coo
                 desired_checksums = MinimalisticDataPartChecksums::deserializeFrom(desired_checksums_str);
             }
 
-            const auto [lo, hi] = desired_checksums.hash_of_all_files;
-            log_entry.part_checksum = getHexUIntUppercase(hi) + getHexUIntUppercase(lo);
+            log_entry.part_checksum = getHexUIntUppercase(desired_checksums.hash_of_all_files);
         }
         else
         {
diff --git a/src/Storages/System/StorageSystemParts.cpp b/src/Storages/System/StorageSystemParts.cpp
index b642f4b5088..7399bd789a7 100644
--- a/src/Storages/System/StorageSystemParts.cpp
+++ b/src/Storages/System/StorageSystemParts.cpp
@@ -252,17 +252,17 @@ void StorageSystemParts::processNextStorage(
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.hash_of_all_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.hash_of_uncompressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.uncompressed_hash_of_compressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
         }
 
diff --git a/src/Storages/System/StorageSystemProjectionParts.cpp b/src/Storages/System/StorageSystemProjectionParts.cpp
index 05c83747c4d..213865a8d61 100644
--- a/src/Storages/System/StorageSystemProjectionParts.cpp
+++ b/src/Storages/System/StorageSystemProjectionParts.cpp
@@ -221,17 +221,17 @@ void StorageSystemProjectionParts::processNextStorage(
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.hash_of_all_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.hash_of_uncompressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
             if (columns_mask[src_index++])
             {
                 auto checksum = helper.uncompressed_hash_of_compressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
             }
         }
 
diff --git a/utils/checksum-for-compressed-block/main.cpp b/utils/checksum-for-compressed-block/main.cpp
index d30a3798820..4ae06a78ab4 100644
--- a/utils/checksum-for-compressed-block/main.cpp
+++ b/utils/checksum-for-compressed-block/main.cpp
@@ -45,7 +45,7 @@ int main(int, char **)
     {
         auto flipped = flipBit(str, pos);
         auto checksum = CityHash_v1_0_2::CityHash128(flipped.data(), flipped.size());
-        std::cout << getHexUIntLowercase(checksum.high64) << getHexUIntLowercase(checksum.low64) << "\t" << pos / 8 << ", " << pos % 8 << "\n";
+        std::cout << getHexUIntLowercase(checksum) << "\t" << pos / 8 << ", " << pos % 8 << "\n";
     }
 
     return 0;