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https://github.com/ClickHouse/ClickHouse.git
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1022 lines
31 KiB
C++
1022 lines
31 KiB
C++
#pragma once
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#include <cstring>
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#include <cstdio>
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#include <limits>
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#include <algorithm>
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#include <iterator>
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#include <common/DateLUT.h>
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#include <common/LocalDate.h>
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#include <common/LocalDateTime.h>
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#include <common/find_symbols.h>
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#include <common/StringRef.h>
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#include <Core/DecimalFunctions.h>
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#include <Core/Types.h>
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#include <Core/UUID.h>
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#include <Common/Exception.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/UInt128.h>
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#include <IO/CompressionMethod.h>
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#include <IO/WriteBuffer.h>
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#include <IO/WriteIntText.h>
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#include <IO/VarInt.h>
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#include <IO/DoubleConverter.h>
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#include <IO/WriteBufferFromString.h>
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#include <ryu/ryu.h>
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#include <Formats/FormatSettings.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CANNOT_PRINT_FLOAT_OR_DOUBLE_NUMBER;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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}
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/// Helper functions for formatted and binary output.
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inline void writeChar(char x, WriteBuffer & buf)
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{
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buf.nextIfAtEnd();
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*buf.position() = x;
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++buf.position();
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}
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/// Write the same character n times.
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inline void writeChar(char c, size_t n, WriteBuffer & buf)
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{
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while (n)
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{
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buf.nextIfAtEnd();
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size_t count = std::min(n, buf.available());
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memset(buf.position(), c, count);
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n -= count;
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buf.position() += count;
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}
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}
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/// Write POD-type in native format. It's recommended to use only with packed (dense) data types.
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template <typename T>
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inline void writePODBinary(const T & x, WriteBuffer & buf)
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{
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buf.write(reinterpret_cast<const char *>(&x), sizeof(x));
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}
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template <typename T>
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inline void writeIntBinary(const T & x, WriteBuffer & buf)
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{
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writePODBinary(x, buf);
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}
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template <typename T>
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inline void writeFloatBinary(const T & x, WriteBuffer & buf)
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{
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writePODBinary(x, buf);
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}
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inline void writeStringBinary(const std::string & s, WriteBuffer & buf)
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{
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writeVarUInt(s.size(), buf);
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buf.write(s.data(), s.size());
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}
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inline void writeStringBinary(const char * s, WriteBuffer & buf)
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{
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writeVarUInt(strlen(s), buf);
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buf.write(s, strlen(s));
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}
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inline void writeStringBinary(const StringRef & s, WriteBuffer & buf)
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{
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writeVarUInt(s.size, buf);
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buf.write(s.data, s.size);
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}
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template <typename T>
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void writeVectorBinary(const std::vector<T> & v, WriteBuffer & buf)
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{
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writeVarUInt(v.size(), buf);
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for (typename std::vector<T>::const_iterator it = v.begin(); it != v.end(); ++it)
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writeBinary(*it, buf);
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}
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inline void writeBoolText(bool x, WriteBuffer & buf)
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{
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writeChar(x ? '1' : '0', buf);
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}
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struct DecomposedFloat64
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{
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DecomposedFloat64(double x)
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{
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memcpy(&x_uint, &x, sizeof(x));
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}
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uint64_t x_uint;
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bool sign() const
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{
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return x_uint >> 63;
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}
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uint16_t exponent() const
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{
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return (x_uint >> 52) & 0x7FF;
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}
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int16_t normalized_exponent() const
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{
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return int16_t(exponent()) - 1023;
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}
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uint64_t mantissa() const
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{
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return x_uint & 0x5affffffffffffful;
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}
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/// NOTE Probably floating point instructions can be better.
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bool is_inside_int64() const
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{
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return x_uint == 0
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|| (normalized_exponent() >= 0 && normalized_exponent() <= 52
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&& ((mantissa() & ((1ULL << (52 - normalized_exponent())) - 1)) == 0));
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}
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};
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struct DecomposedFloat32
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{
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DecomposedFloat32(float x)
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{
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memcpy(&x_uint, &x, sizeof(x));
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}
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uint32_t x_uint;
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bool sign() const
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{
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return x_uint >> 31;
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}
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uint16_t exponent() const
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{
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return (x_uint >> 23) & 0xFF;
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}
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int16_t normalized_exponent() const
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{
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return int16_t(exponent()) - 127;
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}
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uint32_t mantissa() const
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{
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return x_uint & 0x7fffff;
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}
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bool is_inside_int32() const
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{
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return x_uint == 0
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|| (normalized_exponent() >= 0 && normalized_exponent() <= 23
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&& ((mantissa() & ((1ULL << (23 - normalized_exponent())) - 1)) == 0));
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}
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};
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template <typename T>
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inline size_t writeFloatTextFastPath(T x, char * buffer)
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{
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int result = 0;
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if constexpr (std::is_same_v<T, double>)
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{
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/// The library Ryu has low performance on integers.
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/// This workaround improves performance 6..10 times.
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if (DecomposedFloat64(x).is_inside_int64())
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result = itoa(Int64(x), buffer) - buffer;
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else
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result = d2s_buffered_n(x, buffer);
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}
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else
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{
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if (DecomposedFloat32(x).is_inside_int32())
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result = itoa(Int32(x), buffer) - buffer;
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else
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result = f2s_buffered_n(x, buffer);
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}
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if (result <= 0)
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throw Exception("Cannot print floating point number", ErrorCodes::CANNOT_PRINT_FLOAT_OR_DOUBLE_NUMBER);
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return result;
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}
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template <typename T>
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inline void writeFloatText(T x, WriteBuffer & buf)
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{
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static_assert(std::is_same_v<T, double> || std::is_same_v<T, float>, "Argument for writeFloatText must be float or double");
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using Converter = DoubleConverter<false>;
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if (likely(buf.available() >= Converter::MAX_REPRESENTATION_LENGTH))
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{
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buf.position() += writeFloatTextFastPath(x, buf.position());
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return;
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}
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Converter::BufferType buffer;
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size_t result = writeFloatTextFastPath(x, buffer);
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buf.write(buffer, result);
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}
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inline void writeString(const char * data, size_t size, WriteBuffer & buf)
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{
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buf.write(data, size);
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}
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inline void writeString(const StringRef & ref, WriteBuffer & buf)
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{
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writeString(ref.data, ref.size, buf);
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}
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/** Writes a C-string without creating a temporary object. If the string is a literal, then `strlen` is executed at the compilation stage.
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* Use when the string is a literal.
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*/
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#define writeCString(s, buf) \
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(buf).write((s), strlen(s))
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/** Writes a string for use in the JSON format:
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* - the string is written in double quotes
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* - slash character '/' is escaped for compatibility with JavaScript
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* - bytes from the range 0x00-0x1F except `\b', '\f', '\n', '\r', '\t' are escaped as \u00XX
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* - code points U+2028 and U+2029 (byte sequences in UTF-8: e2 80 a8, e2 80 a9) are escaped as \u2028 and \u2029
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* - it is assumed that string is in UTF-8, the invalid UTF-8 is not processed
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* - all other non-ASCII characters remain as is
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*/
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inline void writeJSONString(const char * begin, const char * end, WriteBuffer & buf, const FormatSettings & settings)
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{
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writeChar('"', buf);
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for (const char * it = begin; it != end; ++it)
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{
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switch (*it)
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{
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case '\b':
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writeChar('\\', buf);
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writeChar('b', buf);
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break;
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case '\f':
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writeChar('\\', buf);
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writeChar('f', buf);
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break;
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case '\n':
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writeChar('\\', buf);
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writeChar('n', buf);
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break;
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case '\r':
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writeChar('\\', buf);
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writeChar('r', buf);
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break;
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case '\t':
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writeChar('\\', buf);
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writeChar('t', buf);
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break;
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case '\\':
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writeChar('\\', buf);
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writeChar('\\', buf);
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break;
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case '/':
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if (settings.json.escape_forward_slashes)
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writeChar('\\', buf);
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writeChar('/', buf);
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break;
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case '"':
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writeChar('\\', buf);
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writeChar('"', buf);
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break;
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default:
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UInt8 c = *it;
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if (c <= 0x1F)
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{
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/// Escaping of ASCII control characters.
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UInt8 higher_half = c >> 4;
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UInt8 lower_half = c & 0xF;
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writeCString("\\u00", buf);
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writeChar('0' + higher_half, buf);
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if (lower_half <= 9)
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writeChar('0' + lower_half, buf);
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else
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writeChar('A' + lower_half - 10, buf);
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}
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else if (end - it >= 3 && it[0] == '\xE2' && it[1] == '\x80' && (it[2] == '\xA8' || it[2] == '\xA9'))
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{
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/// This is for compatibility with JavaScript, because unescaped line separators are prohibited in string literals,
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/// and these code points are alternative line separators.
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if (it[2] == '\xA8')
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writeCString("\\u2028", buf);
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if (it[2] == '\xA9')
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writeCString("\\u2029", buf);
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/// Byte sequence is 3 bytes long. We have additional two bytes to skip.
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it += 2;
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}
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else
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writeChar(*it, buf);
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}
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}
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writeChar('"', buf);
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}
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/** Will escape quote_character and a list of special characters('\b', '\f', '\n', '\r', '\t', '\0', '\\').
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* - when escape_quote_with_quote is true, use backslash to escape list of special characters,
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* and use quote_character to escape quote_character. such as: 'hello''world'
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* - otherwise use backslash to escape list of special characters and quote_character
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*/
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template <char quote_character, bool escape_quote_with_quote = false>
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void writeAnyEscapedString(const char * begin, const char * end, WriteBuffer & buf)
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{
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const char * pos = begin;
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while (true)
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{
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/// On purpose we will escape more characters than minimally necessary.
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const char * next_pos = find_first_symbols<'\b', '\f', '\n', '\r', '\t', '\0', '\\', quote_character>(pos, end);
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if (next_pos == end)
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{
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buf.write(pos, next_pos - pos);
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break;
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}
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else
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{
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buf.write(pos, next_pos - pos);
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pos = next_pos;
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switch (*pos)
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{
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case '\b':
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writeChar('\\', buf);
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writeChar('b', buf);
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break;
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case '\f':
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writeChar('\\', buf);
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writeChar('f', buf);
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break;
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case '\n':
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writeChar('\\', buf);
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writeChar('n', buf);
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break;
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case '\r':
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writeChar('\\', buf);
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writeChar('r', buf);
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break;
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case '\t':
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writeChar('\\', buf);
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writeChar('t', buf);
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break;
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case '\0':
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writeChar('\\', buf);
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writeChar('0', buf);
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break;
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case '\\':
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writeChar('\\', buf);
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writeChar('\\', buf);
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break;
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case quote_character:
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{
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if constexpr (escape_quote_with_quote)
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writeChar(quote_character, buf);
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else
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writeChar('\\', buf);
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writeChar(quote_character, buf);
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break;
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}
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default:
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writeChar(*pos, buf);
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}
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++pos;
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}
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}
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}
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inline void writeJSONString(const String & s, WriteBuffer & buf, const FormatSettings & settings)
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{
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writeJSONString(s.data(), s.data() + s.size(), buf, settings);
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}
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inline void writeJSONString(const StringRef & ref, WriteBuffer & buf, const FormatSettings & settings)
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{
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writeJSONString(ref.data, ref.data + ref.size, buf, settings);
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}
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template <char c>
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void writeAnyEscapedString(const String & s, WriteBuffer & buf)
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{
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writeAnyEscapedString<c>(s.data(), s.data() + s.size(), buf);
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}
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inline void writeEscapedString(const char * str, size_t size, WriteBuffer & buf)
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{
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writeAnyEscapedString<'\''>(str, str + size, buf);
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}
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inline void writeEscapedString(const String & s, WriteBuffer & buf)
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{
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writeEscapedString(s.data(), s.size(), buf);
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}
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inline void writeEscapedString(const StringRef & ref, WriteBuffer & buf)
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{
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writeEscapedString(ref.data, ref.size, buf);
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}
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template <char quote_character>
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void writeAnyQuotedString(const char * begin, const char * end, WriteBuffer & buf)
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{
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writeChar(quote_character, buf);
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writeAnyEscapedString<quote_character>(begin, end, buf);
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writeChar(quote_character, buf);
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}
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template <char quote_character>
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void writeAnyQuotedString(const String & s, WriteBuffer & buf)
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{
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writeAnyQuotedString<quote_character>(s.data(), s.data() + s.size(), buf);
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}
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template <char quote_character>
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void writeAnyQuotedString(const StringRef & ref, WriteBuffer & buf)
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{
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writeAnyQuotedString<quote_character>(ref.data, ref.data + ref.size, buf);
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}
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inline void writeQuotedString(const String & s, WriteBuffer & buf)
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{
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writeAnyQuotedString<'\''>(s, buf);
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}
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inline void writeQuotedString(const StringRef & ref, WriteBuffer & buf)
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{
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writeAnyQuotedString<'\''>(ref, buf);
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}
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inline void writeDoubleQuotedString(const StringRef & s, WriteBuffer & buf)
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{
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writeAnyQuotedString<'"'>(s, buf);
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}
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/// Outputs a string in backquotes.
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inline void writeBackQuotedString(const StringRef & s, WriteBuffer & buf)
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{
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writeAnyQuotedString<'`'>(s, buf);
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}
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|
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/// Outputs a string in backquotes for MySQL.
|
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inline void writeBackQuotedStringMySQL(const StringRef & s, WriteBuffer & buf)
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{
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writeChar('`', buf);
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writeAnyEscapedString<'`', true>(s.data, s.data + s.size, buf);
|
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writeChar('`', buf);
|
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}
|
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|
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|
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/// Write quoted if the string doesn't look like and identifier.
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void writeProbablyBackQuotedString(const StringRef & s, WriteBuffer & buf);
|
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void writeProbablyDoubleQuotedString(const StringRef & s, WriteBuffer & buf);
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void writeProbablyBackQuotedStringMySQL(const StringRef & s, WriteBuffer & buf);
|
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|
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|
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/** Outputs the string in for the CSV format.
|
||
* Rules:
|
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* - the string is outputted in quotation marks;
|
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* - the quotation mark inside the string is outputted as two quotation marks in sequence.
|
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*/
|
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template <char quote = '"'>
|
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void writeCSVString(const char * begin, const char * end, WriteBuffer & buf)
|
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{
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writeChar(quote, buf);
|
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|
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const char * pos = begin;
|
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while (true)
|
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{
|
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const char * next_pos = find_first_symbols<quote>(pos, end);
|
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|
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if (next_pos == end)
|
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{
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buf.write(pos, end - pos);
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break;
|
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}
|
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else /// Quotation.
|
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{
|
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++next_pos;
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buf.write(pos, next_pos - pos);
|
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writeChar(quote, buf);
|
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}
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|
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pos = next_pos;
|
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}
|
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|
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writeChar(quote, buf);
|
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}
|
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|
||
template <char quote = '"'>
|
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void writeCSVString(const String & s, WriteBuffer & buf)
|
||
{
|
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writeCSVString<quote>(s.data(), s.data() + s.size(), buf);
|
||
}
|
||
|
||
template <char quote = '"'>
|
||
void writeCSVString(const StringRef & s, WriteBuffer & buf)
|
||
{
|
||
writeCSVString<quote>(s.data, s.data + s.size, buf);
|
||
}
|
||
|
||
|
||
/// Writing a string to a text node in XML (not into an attribute - otherwise you need more escaping).
|
||
inline void writeXMLString(const char * begin, const char * end, WriteBuffer & buf)
|
||
{
|
||
const char * pos = begin;
|
||
while (true)
|
||
{
|
||
/// NOTE Perhaps for some XML parsers, you need to escape the zero byte and some control characters.
|
||
const char * next_pos = find_first_symbols<'<', '&'>(pos, end);
|
||
|
||
if (next_pos == end)
|
||
{
|
||
buf.write(pos, end - pos);
|
||
break;
|
||
}
|
||
else if (*next_pos == '<')
|
||
{
|
||
buf.write(pos, next_pos - pos);
|
||
++next_pos;
|
||
writeCString("<", buf);
|
||
}
|
||
else if (*next_pos == '&')
|
||
{
|
||
buf.write(pos, next_pos - pos);
|
||
++next_pos;
|
||
writeCString("&", buf);
|
||
}
|
||
|
||
pos = next_pos;
|
||
}
|
||
}
|
||
|
||
inline void writeXMLString(const String & s, WriteBuffer & buf)
|
||
{
|
||
writeXMLString(s.data(), s.data() + s.size(), buf);
|
||
}
|
||
|
||
inline void writeXMLString(const StringRef & s, WriteBuffer & buf)
|
||
{
|
||
writeXMLString(s.data, s.data + s.size, buf);
|
||
}
|
||
|
||
template <typename IteratorSrc, typename IteratorDst>
|
||
void formatHex(IteratorSrc src, IteratorDst dst, const size_t num_bytes);
|
||
void formatUUID(const UInt8 * src16, UInt8 * dst36);
|
||
void formatUUID(std::reverse_iterator<const UInt8 *> src16, UInt8 * dst36);
|
||
|
||
inline void writeUUIDText(const UUID & uuid, WriteBuffer & buf)
|
||
{
|
||
char s[36];
|
||
|
||
formatUUID(std::reverse_iterator<const UInt8 *>(reinterpret_cast<const UInt8 *>(&uuid) + 16), reinterpret_cast<UInt8 *>(s));
|
||
buf.write(s, sizeof(s));
|
||
}
|
||
|
||
|
||
static const char digits100[201] =
|
||
"00010203040506070809"
|
||
"10111213141516171819"
|
||
"20212223242526272829"
|
||
"30313233343536373839"
|
||
"40414243444546474849"
|
||
"50515253545556575859"
|
||
"60616263646566676869"
|
||
"70717273747576777879"
|
||
"80818283848586878889"
|
||
"90919293949596979899";
|
||
|
||
/// in YYYY-MM-DD format
|
||
template <char delimiter = '-'>
|
||
inline void writeDateText(const LocalDate & date, WriteBuffer & buf)
|
||
{
|
||
if (buf.position() + 10 <= buf.buffer().end())
|
||
{
|
||
memcpy(buf.position(), &digits100[date.year() / 100 * 2], 2);
|
||
buf.position() += 2;
|
||
memcpy(buf.position(), &digits100[date.year() % 100 * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = delimiter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[date.month() * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = delimiter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[date.day() * 2], 2);
|
||
buf.position() += 2;
|
||
}
|
||
else
|
||
{
|
||
buf.write(&digits100[date.year() / 100 * 2], 2);
|
||
buf.write(&digits100[date.year() % 100 * 2], 2);
|
||
buf.write(delimiter);
|
||
buf.write(&digits100[date.month() * 2], 2);
|
||
buf.write(delimiter);
|
||
buf.write(&digits100[date.day() * 2], 2);
|
||
}
|
||
}
|
||
|
||
template <char delimiter = '-'>
|
||
inline void writeDateText(DayNum date, WriteBuffer & buf)
|
||
{
|
||
if (unlikely(!date))
|
||
{
|
||
static const char s[] = {'0', '0', '0', '0', delimiter, '0', '0', delimiter, '0', '0'};
|
||
buf.write(s, sizeof(s));
|
||
return;
|
||
}
|
||
|
||
writeDateText<delimiter>(LocalDate(date), buf);
|
||
}
|
||
|
||
|
||
/// In the format YYYY-MM-DD HH:MM:SS
|
||
template <char date_delimeter = '-', char time_delimeter = ':', char between_date_time_delimiter = ' '>
|
||
inline void writeDateTimeText(const LocalDateTime & datetime, WriteBuffer & buf)
|
||
{
|
||
if (buf.position() + 19 <= buf.buffer().end())
|
||
{
|
||
memcpy(buf.position(), &digits100[datetime.year() / 100 * 2], 2);
|
||
buf.position() += 2;
|
||
memcpy(buf.position(), &digits100[datetime.year() % 100 * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = date_delimeter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[datetime.month() * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = date_delimeter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[datetime.day() * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = between_date_time_delimiter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[datetime.hour() * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = time_delimeter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[datetime.minute() * 2], 2);
|
||
buf.position() += 2;
|
||
*buf.position() = time_delimeter;
|
||
++buf.position();
|
||
memcpy(buf.position(), &digits100[datetime.second() * 2], 2);
|
||
buf.position() += 2;
|
||
}
|
||
else
|
||
{
|
||
buf.write(&digits100[datetime.year() / 100 * 2], 2);
|
||
buf.write(&digits100[datetime.year() % 100 * 2], 2);
|
||
buf.write(date_delimeter);
|
||
buf.write(&digits100[datetime.month() * 2], 2);
|
||
buf.write(date_delimeter);
|
||
buf.write(&digits100[datetime.day() * 2], 2);
|
||
buf.write(between_date_time_delimiter);
|
||
buf.write(&digits100[datetime.hour() * 2], 2);
|
||
buf.write(time_delimeter);
|
||
buf.write(&digits100[datetime.minute() * 2], 2);
|
||
buf.write(time_delimeter);
|
||
buf.write(&digits100[datetime.second() * 2], 2);
|
||
}
|
||
}
|
||
|
||
/// In the format YYYY-MM-DD HH:MM:SS, according to the specified time zone.
|
||
template <char date_delimeter = '-', char time_delimeter = ':', char between_date_time_delimiter = ' '>
|
||
inline void writeDateTimeText(time_t datetime, WriteBuffer & buf, const DateLUTImpl & date_lut = DateLUT::instance())
|
||
{
|
||
if (unlikely(!datetime))
|
||
{
|
||
static const char s[] =
|
||
{
|
||
'0', '0', '0', '0', date_delimeter, '0', '0', date_delimeter, '0', '0',
|
||
between_date_time_delimiter,
|
||
'0', '0', time_delimeter, '0', '0', time_delimeter, '0', '0'
|
||
};
|
||
buf.write(s, sizeof(s));
|
||
return;
|
||
}
|
||
|
||
const auto & values = date_lut.getValues(datetime);
|
||
writeDateTimeText<date_delimeter, time_delimeter, between_date_time_delimiter>(
|
||
LocalDateTime(values.year, values.month, values.day_of_month,
|
||
date_lut.toHour(datetime), date_lut.toMinute(datetime), date_lut.toSecond(datetime)), buf);
|
||
}
|
||
|
||
/// In the format YYYY-MM-DD HH:MM:SS.NNNNNNNNN, according to the specified time zone.
|
||
template <char date_delimeter = '-', char time_delimeter = ':', char between_date_time_delimiter = ' ', char fractional_time_delimiter = '.'>
|
||
inline void writeDateTimeText(DateTime64 datetime64, UInt32 scale, WriteBuffer & buf, const DateLUTImpl & date_lut = DateLUT::instance())
|
||
{
|
||
static constexpr UInt32 MaxScale = DecimalUtils::maxPrecision<DateTime64>();
|
||
scale = scale > MaxScale ? MaxScale : scale;
|
||
if (unlikely(!datetime64))
|
||
{
|
||
static const char s[] =
|
||
{
|
||
'0', '0', '0', '0', date_delimeter, '0', '0', date_delimeter, '0', '0',
|
||
between_date_time_delimiter,
|
||
'0', '0', time_delimeter, '0', '0', time_delimeter, '0', '0',
|
||
fractional_time_delimiter,
|
||
// Exactly MaxScale zeroes
|
||
'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'
|
||
};
|
||
buf.write(s, sizeof(s) - (MaxScale - scale)
|
||
+ (scale == 0 ? -1 : 0)); // if scale is zero, also remove the fractional_time_delimiter.
|
||
return;
|
||
}
|
||
auto c = DecimalUtils::split(datetime64, scale);
|
||
const auto & values = date_lut.getValues(c.whole);
|
||
writeDateTimeText<date_delimeter, time_delimeter, between_date_time_delimiter>(
|
||
LocalDateTime(values.year, values.month, values.day_of_month,
|
||
date_lut.toHour(c.whole), date_lut.toMinute(c.whole), date_lut.toSecond(c.whole)), buf);
|
||
|
||
if (scale > 0)
|
||
{
|
||
buf.write(fractional_time_delimiter);
|
||
|
||
char data[20] = {'0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'};
|
||
static_assert(sizeof(data) >= MaxScale);
|
||
|
||
auto fractional = c.fractional;
|
||
for (Int32 pos = scale - 1; pos >= 0 && fractional; --pos, fractional /= DateTime64(10))
|
||
data[pos] += fractional % DateTime64(10);
|
||
|
||
writeString(&data[0], static_cast<size_t>(scale), buf);
|
||
}
|
||
}
|
||
|
||
/// In the RFC 1123 format: "Tue, 03 Dec 2019 00:11:50 GMT". You must provide GMT DateLUT.
|
||
/// This is needed for HTTP requests.
|
||
inline void writeDateTimeTextRFC1123(time_t datetime, WriteBuffer & buf, const DateLUTImpl & date_lut)
|
||
{
|
||
const auto & values = date_lut.getValues(datetime);
|
||
|
||
static const char week_days[3 * 8 + 1] = "XXX" "Mon" "Tue" "Wed" "Thu" "Fri" "Sat" "Sun";
|
||
static const char months[3 * 13 + 1] = "XXX" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec";
|
||
|
||
buf.write(&week_days[values.day_of_week * 3], 3);
|
||
buf.write(", ", 2);
|
||
buf.write(&digits100[values.day_of_month * 2], 2);
|
||
buf.write(' ');
|
||
buf.write(&months[values.month * 3], 3);
|
||
buf.write(' ');
|
||
buf.write(&digits100[values.year / 100 * 2], 2);
|
||
buf.write(&digits100[values.year % 100 * 2], 2);
|
||
buf.write(' ');
|
||
buf.write(&digits100[date_lut.toHour(datetime) * 2], 2);
|
||
buf.write(':');
|
||
buf.write(&digits100[date_lut.toMinute(datetime) * 2], 2);
|
||
buf.write(':');
|
||
buf.write(&digits100[date_lut.toSecond(datetime) * 2], 2);
|
||
buf.write(" GMT", 4);
|
||
}
|
||
|
||
|
||
/// Methods for output in binary format.
|
||
template <typename T>
|
||
inline std::enable_if_t<is_arithmetic_v<T>, void>
|
||
writeBinary(const T & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
|
||
inline void writeBinary(const String & x, WriteBuffer & buf) { writeStringBinary(x, buf); }
|
||
inline void writeBinary(const StringRef & x, WriteBuffer & buf) { writeStringBinary(x, buf); }
|
||
inline void writeBinary(const Int128 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const UInt128 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const UInt256 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const Decimal32 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const Decimal64 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const Decimal128 & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const LocalDate & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
inline void writeBinary(const LocalDateTime & x, WriteBuffer & buf) { writePODBinary(x, buf); }
|
||
|
||
|
||
/// Methods for outputting the value in text form for a tab-separated format.
|
||
template <typename T>
|
||
inline std::enable_if_t<is_integral_v<T>, void>
|
||
writeText(const T & x, WriteBuffer & buf) { writeIntText(x, buf); }
|
||
|
||
template <typename T>
|
||
inline std::enable_if_t<std::is_floating_point_v<T>, void>
|
||
writeText(const T & x, WriteBuffer & buf) { writeFloatText(x, buf); }
|
||
|
||
inline void writeText(const String & x, WriteBuffer & buf) { writeEscapedString(x, buf); }
|
||
|
||
/// Implemented as template specialization (not function overload) to avoid preference over templates on arithmetic types above.
|
||
template <> inline void writeText<bool>(const bool & x, WriteBuffer & buf) { writeBoolText(x, buf); }
|
||
|
||
/// unlike the method for std::string
|
||
/// assumes here that `x` is a null-terminated string.
|
||
inline void writeText(const char * x, WriteBuffer & buf) { writeEscapedString(x, strlen(x), buf); }
|
||
inline void writeText(const char * x, size_t size, WriteBuffer & buf) { writeEscapedString(x, size, buf); }
|
||
|
||
inline void writeText(const LocalDate & x, WriteBuffer & buf) { writeDateText(x, buf); }
|
||
inline void writeText(const LocalDateTime & x, WriteBuffer & buf) { writeDateTimeText(x, buf); }
|
||
inline void writeText(const UUID & x, WriteBuffer & buf) { writeUUIDText(x, buf); }
|
||
inline void writeText(const UInt128 & x, WriteBuffer & buf) { writeText(UUID(x), buf); }
|
||
|
||
template <typename T>
|
||
void writeText(Decimal<T> value, UInt32 scale, WriteBuffer & ostr)
|
||
{
|
||
if (value < Decimal<T>(0))
|
||
{
|
||
value *= Decimal<T>(-1);
|
||
writeChar('-', ostr); /// avoid crop leading minus when whole part is zero
|
||
}
|
||
|
||
const T whole_part = DecimalUtils::getWholePart(value, scale);
|
||
|
||
writeIntText(whole_part, ostr);
|
||
if (scale)
|
||
{
|
||
writeChar('.', ostr);
|
||
String str_fractional(scale, '0');
|
||
for (Int32 pos = scale - 1; pos >= 0; --pos, value /= Decimal<T>(10))
|
||
str_fractional[pos] += value % Decimal<T>(10);
|
||
ostr.write(str_fractional.data(), scale);
|
||
}
|
||
}
|
||
|
||
/// String, date, datetime are in single quotes with C-style escaping. Numbers - without.
|
||
template <typename T>
|
||
inline std::enable_if_t<is_arithmetic_v<T>, void>
|
||
writeQuoted(const T & x, WriteBuffer & buf) { writeText(x, buf); }
|
||
|
||
inline void writeQuoted(const String & x, WriteBuffer & buf) { writeQuotedString(x, buf); }
|
||
|
||
inline void writeQuoted(const LocalDate & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('\'', buf);
|
||
writeDateText(x, buf);
|
||
writeChar('\'', buf);
|
||
}
|
||
|
||
inline void writeQuoted(const LocalDateTime & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('\'', buf);
|
||
writeDateTimeText(x, buf);
|
||
writeChar('\'', buf);
|
||
}
|
||
|
||
inline void writeQuoted(const UUID & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('\'', buf);
|
||
writeText(x, buf);
|
||
writeChar('\'', buf);
|
||
}
|
||
|
||
/// String, date, datetime are in double quotes with C-style escaping. Numbers - without.
|
||
template <typename T>
|
||
inline std::enable_if_t<is_arithmetic_v<T>, void>
|
||
writeDoubleQuoted(const T & x, WriteBuffer & buf) { writeText(x, buf); }
|
||
|
||
inline void writeDoubleQuoted(const String & x, WriteBuffer & buf) { writeDoubleQuotedString(x, buf); }
|
||
|
||
inline void writeDoubleQuoted(const LocalDate & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('"', buf);
|
||
writeDateText(x, buf);
|
||
writeChar('"', buf);
|
||
}
|
||
|
||
inline void writeDoubleQuoted(const LocalDateTime & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('"', buf);
|
||
writeDateTimeText(x, buf);
|
||
writeChar('"', buf);
|
||
}
|
||
|
||
inline void writeDoubleQuoted(const UUID & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('"', buf);
|
||
writeText(x, buf);
|
||
writeChar('"', buf);
|
||
}
|
||
|
||
|
||
/// String - in double quotes and with CSV-escaping; date, datetime - in double quotes. Numbers - without.
|
||
template <typename T>
|
||
inline std::enable_if_t<is_arithmetic_v<T>, void>
|
||
writeCSV(const T & x, WriteBuffer & buf) { writeText(x, buf); }
|
||
|
||
inline void writeCSV(const String & x, WriteBuffer & buf) { writeCSVString<>(x, buf); }
|
||
inline void writeCSV(const LocalDate & x, WriteBuffer & buf) { writeDoubleQuoted(x, buf); }
|
||
inline void writeCSV(const LocalDateTime & x, WriteBuffer & buf) { writeDoubleQuoted(x, buf); }
|
||
inline void writeCSV(const UUID & x, WriteBuffer & buf) { writeDoubleQuoted(x, buf); }
|
||
[[noreturn]] inline void writeCSV(const UInt128, WriteBuffer &)
|
||
{
|
||
/** Because UInt128 isn't a natural type, without arithmetic operator and only use as an intermediary type -for UUID-
|
||
* it should never arrive here. But because we used the DataTypeNumber class we should have at least a definition of it.
|
||
*/
|
||
throw Exception("UInt128 cannot be write as a text", ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
|
||
}
|
||
|
||
template <typename T>
|
||
void writeBinary(const std::vector<T> & x, WriteBuffer & buf)
|
||
{
|
||
size_t size = x.size();
|
||
writeVarUInt(size, buf);
|
||
for (size_t i = 0; i < size; ++i)
|
||
writeBinary(x[i], buf);
|
||
}
|
||
|
||
template <typename T>
|
||
void writeQuoted(const std::vector<T> & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('[', buf);
|
||
for (size_t i = 0, size = x.size(); i < size; ++i)
|
||
{
|
||
if (i != 0)
|
||
writeChar(',', buf);
|
||
writeQuoted(x[i], buf);
|
||
}
|
||
writeChar(']', buf);
|
||
}
|
||
|
||
template <typename T>
|
||
void writeDoubleQuoted(const std::vector<T> & x, WriteBuffer & buf)
|
||
{
|
||
writeChar('[', buf);
|
||
for (size_t i = 0, size = x.size(); i < size; ++i)
|
||
{
|
||
if (i != 0)
|
||
writeChar(',', buf);
|
||
writeDoubleQuoted(x[i], buf);
|
||
}
|
||
writeChar(']', buf);
|
||
}
|
||
|
||
template <typename T>
|
||
void writeText(const std::vector<T> & x, WriteBuffer & buf)
|
||
{
|
||
writeQuoted(x, buf);
|
||
}
|
||
|
||
|
||
/// Serialize exception (so that it can be transferred over the network)
|
||
void writeException(const Exception & e, WriteBuffer & buf, bool with_stack_trace);
|
||
|
||
|
||
/// An easy-to-use method for converting something to a string in text form.
|
||
template <typename T>
|
||
inline String toString(const T & x)
|
||
{
|
||
WriteBufferFromOwnString buf;
|
||
writeText(x, buf);
|
||
return buf.str();
|
||
}
|
||
|
||
inline void writeNullTerminatedString(const String & s, WriteBuffer & buffer)
|
||
{
|
||
/// c_str is guaranteed to return zero-terminated string
|
||
buffer.write(s.с_str(), s.size() + 1);
|
||
}
|
||
|
||
template <typename T>
|
||
inline std::enable_if_t<is_arithmetic_v<T> && (sizeof(T) <= 8), void>
|
||
writeBinaryBigEndian(T x, WriteBuffer & buf) /// Assuming little endian architecture.
|
||
{
|
||
if constexpr (sizeof(x) == 2)
|
||
x = __builtin_bswap16(x);
|
||
else if constexpr (sizeof(x) == 4)
|
||
x = __builtin_bswap32(x);
|
||
else if constexpr (sizeof(x) == 8)
|
||
x = __builtin_bswap64(x);
|
||
|
||
writePODBinary(x, buf);
|
||
}
|
||
|
||
}
|