mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-22 09:40:49 +00:00
501 lines
11 KiB
C++
501 lines
11 KiB
C++
#pragma once
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#include <DB/Core/Types.h>
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#include <DB/IO/ReadBuffer.h>
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#include <DB/IO/WriteBuffer.h>
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namespace DB
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{
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/** Записать UInt64 в формате переменной длины (base128) */
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void writeVarUInt(UInt64 x, std::ostream & ostr);
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void writeVarUInt(UInt64 x, WriteBuffer & ostr);
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char * writeVarUInt(UInt64 x, char * ostr);
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/** Прочитать UInt64, записанный в формате переменной длины (base128) */
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void readVarUInt(UInt64 & x, std::istream & istr);
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void readVarUInt(UInt64 & x, ReadBuffer & istr);
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const char * readVarUInt(UInt64 & x, const char * istr, size_t size);
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/** Получить длину UInt64 в формате VarUInt */
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size_t getLengthOfVarUInt(UInt64 x);
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/** Получить длину Int64 в формате VarInt */
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size_t getLengthOfVarInt(Int64 x);
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/** Записать Int64 в формате переменной длины (base128) */
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template <typename OUT>
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inline void writeVarInt(Int64 x, OUT & ostr)
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{
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writeVarUInt(static_cast<UInt64>((x << 1) ^ (x >> 63)), ostr);
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}
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inline char * writeVarInt(Int64 x, char * ostr)
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{
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return writeVarUInt(static_cast<UInt64>((x << 1) ^ (x >> 63)), ostr);
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}
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/** Прочитать Int64, записанный в формате переменной длины (base128) */
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template <typename IN>
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inline void readVarInt(Int64 & x, IN & istr)
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{
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readVarUInt(*reinterpret_cast<UInt64*>(&x), istr);
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x = (static_cast<UInt64>(x) >> 1) ^ -(x & 1);
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}
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inline const char * readVarInt(Int64 & x, const char * istr, size_t size)
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{
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const char * res = readVarUInt(*reinterpret_cast<UInt64*>(&x), istr, size);
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x = (static_cast<UInt64>(x) >> 1) ^ -(x & 1);
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return res;
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}
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inline void writeVarT(UInt64 x, std::ostream & ostr) { writeVarUInt(x, ostr); }
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inline void writeVarT(Int64 x, std::ostream & ostr) { writeVarInt(x, ostr); }
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inline void writeVarT(UInt64 x, WriteBuffer & ostr) { writeVarUInt(x, ostr); }
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inline void writeVarT(Int64 x, WriteBuffer & ostr) { writeVarInt(x, ostr); }
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inline char * writeVarT(UInt64 x, char * & ostr) { return writeVarUInt(x, ostr); }
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inline char * writeVarT(Int64 x, char * & ostr) { return writeVarInt(x, ostr); }
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inline void readVarT(UInt64 & x, std::istream & istr) { readVarUInt(x, istr); }
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inline void readVarT(Int64 & x, std::istream & istr) { readVarInt(x, istr); }
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inline void readVarT(UInt64 & x, ReadBuffer & istr) { readVarUInt(x, istr); }
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inline void readVarT(Int64 & x, ReadBuffer & istr) { readVarInt(x, istr); }
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inline const char * readVarT(UInt64 & x, const char * istr, size_t size) { return readVarUInt(x, istr, size); }
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inline const char * readVarT(Int64 & x, const char * istr, size_t size) { return readVarInt(x, istr, size); }
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/// Для [U]Int32, [U]Int16.
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inline void readVarUInt(UInt32 & x, ReadBuffer & istr)
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{
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UInt64 tmp;
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readVarUInt(tmp, istr);
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x = tmp;
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}
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inline void readVarInt(Int32 & x, ReadBuffer & istr)
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{
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Int64 tmp;
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readVarInt(tmp, istr);
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x = tmp;
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}
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inline void readVarUInt(UInt16 & x, ReadBuffer & istr)
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{
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UInt64 tmp;
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readVarUInt(tmp, istr);
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x = tmp;
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}
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inline void readVarInt(Int16 & x, ReadBuffer & istr)
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{
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Int64 tmp;
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readVarInt(tmp, istr);
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x = tmp;
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}
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inline void writeVarUInt(UInt64 x, std::ostream & ostr)
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{
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char buf[9];
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buf[0] = static_cast<UInt8>(x | 0x80);
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if (x >= (1ULL << 7))
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{
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buf[1] = static_cast<UInt8>((x >> 7) | 0x80);
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if (x >= (1ULL << 14))
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{
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buf[2] = static_cast<UInt8>((x >> 14) | 0x80);
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if (x >= (1ULL << 21))
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{
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buf[3] = static_cast<UInt8>((x >> 21) | 0x80);
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if (x >= (1ULL << 28))
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{
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buf[4] = static_cast<UInt8>((x >> 28) | 0x80);
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if (x >= (1ULL << 35))
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{
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buf[5] = static_cast<UInt8>((x >> 35) | 0x80);
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if (x >= (1ULL << 42))
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{
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buf[6] = static_cast<UInt8>((x >> 42) | 0x80);
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if (x >= (1ULL << 49))
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{
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buf[7] = static_cast<UInt8>((x >> 49) | 0x80);
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if (x >= (1ULL << 56))
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{
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buf[8] = static_cast<UInt8>(x >> 56);
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ostr.write(buf, 9);
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}
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else
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{
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buf[7] &= 0x7F;
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ostr.write(buf, 8);
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}
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}
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else
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{
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buf[6] &= 0x7F;
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ostr.write(buf, 7);
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}
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}
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else
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{
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buf[5] &= 0x7F;
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ostr.write(buf, 6);
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}
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}
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else
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{
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buf[4] &= 0x7F;
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ostr.write(buf, 5);
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}
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}
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else
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{
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buf[3] &= 0x7F;
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ostr.write(buf, 4);
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}
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}
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else
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{
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buf[2] &= 0x7F;
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ostr.write(buf, 3);
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}
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}
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else
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{
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buf[1] &= 0x7F;
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ostr.write(buf, 2);
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}
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}
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else
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{
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buf[0] &= 0x7F;
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ostr.write(buf, 1);
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}
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}
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inline void throwReadAfterEOF()
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{
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throw Exception("Attempt to read after eof", ErrorCodes::ATTEMPT_TO_READ_AFTER_EOF);
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}
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inline void readChar(char & x, ReadBuffer & buf)
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{
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if (!buf.eof())
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{
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x = *buf.position();
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++buf.position();
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}
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else
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throwReadAfterEOF();
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}
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inline void readVarUInt(UInt64 & x, std::istream & istr)
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{
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int byte;
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byte = istr.get();
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x = static_cast<UInt64>(byte) & 0x7F;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 7;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 14;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 21;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 28;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 35;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 42;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= (static_cast<UInt64>(byte) & 0x7F) << 49;
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if (byte & 0x80)
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{
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byte = istr.get();
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x |= static_cast<UInt64>(byte) << 56;
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}
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}
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}
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}
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}
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}
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}
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}
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}
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inline void writeVarUInt(UInt64 x, WriteBuffer & ostr)
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{
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char buf[9];
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buf[0] = static_cast<UInt8>(x | 0x80);
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if (x >= (1ULL << 7))
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{
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buf[1] = static_cast<UInt8>((x >> 7) | 0x80);
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if (x >= (1ULL << 14))
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{
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buf[2] = static_cast<UInt8>((x >> 14) | 0x80);
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if (x >= (1ULL << 21))
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{
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buf[3] = static_cast<UInt8>((x >> 21) | 0x80);
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if (x >= (1ULL << 28))
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{
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buf[4] = static_cast<UInt8>((x >> 28) | 0x80);
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if (x >= (1ULL << 35))
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{
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buf[5] = static_cast<UInt8>((x >> 35) | 0x80);
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if (x >= (1ULL << 42))
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{
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buf[6] = static_cast<UInt8>((x >> 42) | 0x80);
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if (x >= (1ULL << 49))
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{
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buf[7] = static_cast<UInt8>((x >> 49) | 0x80);
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if (x >= (1ULL << 56))
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{
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buf[8] = static_cast<UInt8>(x >> 56);
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ostr.write(buf, 9);
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}
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else
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{
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buf[7] &= 0x7F;
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ostr.write(buf, 8);
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}
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}
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else
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{
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buf[6] &= 0x7F;
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ostr.write(buf, 7);
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}
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}
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else
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{
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buf[5] &= 0x7F;
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ostr.write(buf, 6);
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}
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}
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else
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{
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buf[4] &= 0x7F;
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ostr.write(buf, 5);
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}
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}
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else
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{
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buf[3] &= 0x7F;
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ostr.write(buf, 4);
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}
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}
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else
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{
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buf[2] &= 0x7F;
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ostr.write(buf, 3);
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}
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}
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else
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{
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buf[1] &= 0x7F;
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ostr.write(buf, 2);
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}
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}
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else
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{
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buf[0] &= 0x7F;
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ostr.write(buf, 1);
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}
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}
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inline void readVarUInt(UInt64 & x, ReadBuffer & istr)
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{
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char byte;
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readChar(byte, istr);
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x = static_cast<UInt64>(byte) & 0x7F;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 7;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 14;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 21;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 28;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 35;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 42;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= (static_cast<UInt64>(byte) & 0x7F) << 49;
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if (byte & 0x80)
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{
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readChar(byte, istr);
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x |= static_cast<UInt64>(byte) << 56;
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}
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}
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}
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}
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}
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}
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}
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}
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}
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inline char * writeVarUInt(UInt64 x, char * ostr)
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{
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*ostr = static_cast<UInt8>(x | 0x80);
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if (x >= (1ULL << 7))
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{
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*++ostr = static_cast<UInt8>((x >> 7) | 0x80);
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if (x >= (1ULL << 14))
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{
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*++ostr = static_cast<UInt8>((x >> 14) | 0x80);
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if (x >= (1ULL << 21))
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{
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*++ostr = static_cast<UInt8>((x >> 21) | 0x80);
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if (x >= (1ULL << 28))
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{
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*++ostr = static_cast<UInt8>((x >> 28) | 0x80);
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if (x >= (1ULL << 35))
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{
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*++ostr = static_cast<UInt8>((x >> 35) | 0x80);
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if (x >= (1ULL << 42))
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{
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*++ostr = static_cast<UInt8>((x >> 42) | 0x80);
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if (x >= (1ULL << 49))
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{
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*++ostr = static_cast<UInt8>((x >> 49) | 0x80);
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if (x >= (1ULL << 56))
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{
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*++ostr = static_cast<UInt8>(x >> 56);
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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}
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else
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*ostr &= 0x7F;
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return ++ostr;
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}
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inline const char * readVarUInt(UInt64 & x, const char * istr, size_t size)
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{
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const char * end = istr + size;
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x = static_cast<UInt64>(*istr) & 0x7F;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 7;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 14;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 21;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 28;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 35;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 42;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= (static_cast<UInt64>(*istr) & 0x7F) << 49;
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if (*istr & 0x80 && ++istr < end)
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{
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x |= static_cast<UInt64>(*istr) << 56;
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}
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}
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}
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}
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}
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}
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}
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}
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return ++istr;
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}
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inline size_t getLengthOfVarUInt(UInt64 x)
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{
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return x < (1ULL << 7) ? 1
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: (x < (1ULL << 14) ? 2
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: (x < (1ULL << 21) ? 3
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: (x < (1ULL << 28) ? 4
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: (x < (1ULL << 35) ? 5
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: (x < (1ULL << 42) ? 6
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: (x < (1ULL << 49) ? 7
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: (x < (1ULL << 56) ? 8
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: 9)))))));
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}
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inline size_t getLengthOfVarInt(Int64 x)
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{
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return getLengthOfVarUInt(static_cast<UInt64>((x << 1) ^ (x >> 63)));
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}
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}
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