e412dd12e8
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
135 lines
4.3 KiB
C++
135 lines
4.3 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/ClickHouse/ClickHouse/blob/master/src/Common/hex.h
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// and modified by Doris
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#pragma once
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#include <cstring>
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#include <string>
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#include "vec/core/types.h"
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namespace doris::vectorized {
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/// Maps 0..15 to 0..9A..F or 0..9a..f correspondingly.
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extern const char* const hex_digit_to_char_uppercase_table;
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extern const char* const hex_digit_to_char_lowercase_table;
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inline char hex_digit_uppercase(unsigned char c) {
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return hex_digit_to_char_uppercase_table[c];
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}
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inline char hex_digit_lowercase(unsigned char c) {
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return hex_digit_to_char_lowercase_table[c];
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}
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/// Maps 0..255 to 00..FF or 00..ff correspondingly
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extern const char* const hex_byte_to_char_uppercase_table;
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extern const char* const hex_byte_to_char_lowercase_table;
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inline void write_hex_byte_uppercase(UInt8 byte, void* out) {
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memcpy(out, &hex_byte_to_char_uppercase_table[static_cast<size_t>(byte) * 2], 2);
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}
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inline void write_hex_byte_lowercase(UInt8 byte, void* out) {
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memcpy(out, &hex_byte_to_char_lowercase_table[static_cast<size_t>(byte) * 2], 2);
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}
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extern const char* const bin_byte_to_char_table;
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inline void write_bin_byte(UInt8 byte, void* out) {
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memcpy(out, &bin_byte_to_char_table[static_cast<size_t>(byte) * 8], 8);
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}
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/// Produces hex representation of an unsigned int with leading zeros (for checksums)
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template <typename TUInt>
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void write_hex_uint_impl(TUInt uint_, char* out, const char* const table) {
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union {
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TUInt value;
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UInt8 uint8[sizeof(TUInt)];
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};
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value = uint_;
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/// Use little endian
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for (size_t i = 0; i < sizeof(TUInt); ++i) {
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memcpy(out + i * 2, &table[static_cast<size_t>(uint8[sizeof(TUInt) - 1 - i]) * 2], 2);
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}
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}
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template <typename TUInt>
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void write_hex_uint_uppercase(TUInt uint_, char* out) {
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write_hex_uint_impl(uint_, out, hex_byte_to_char_uppercase_table);
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}
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template <typename TUInt>
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void write_hex_uint_lowercase(TUInt uint_, char* out) {
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write_hex_uint_impl(uint_, out, hex_byte_to_char_lowercase_table);
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}
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template <typename TUInt>
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std::string get_hex_uint_uppercase(TUInt uint_) {
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std::string res(sizeof(TUInt) * 2, '\0');
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write_hex_uint_uppercase(uint_, res.data());
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return res;
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}
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template <typename TUInt>
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std::string get_hex_uint_lowercase(TUInt uint_) {
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std::string res(sizeof(TUInt) * 2, '\0');
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write_hex_uint_lowercase(uint_, res.data());
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return res;
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}
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/// Maps 0..9, A..F, a..f to 0..15. Other chars are mapped to implementation specific value.
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extern const char* const hex_char_to_digit_table;
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inline UInt8 unhex(char c) {
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return hex_char_to_digit_table[static_cast<UInt8>(c)];
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}
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inline UInt8 unhex2(const char* data) {
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return static_cast<UInt8>(unhex(data[0])) * 0x10 + static_cast<UInt8>(unhex(data[1]));
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}
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inline UInt16 unhex4(const char* data) {
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return static_cast<UInt16>(unhex(data[0])) * 0x1000 +
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static_cast<UInt16>(unhex(data[1])) * 0x100 +
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static_cast<UInt16>(unhex(data[2])) * 0x10 + static_cast<UInt16>(unhex(data[3]));
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}
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template <typename TUInt>
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TUInt unhex_uint(const char* data) {
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TUInt res = TUInt(0);
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if constexpr ((sizeof(TUInt) <= 8) || ((sizeof(TUInt) % 8) != 0)) {
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for (size_t i = 0; i < sizeof(TUInt) * 2; ++i, ++data) {
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res <<= 4;
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res += unhex(*data);
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}
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} else {
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for (size_t i = 0; i < sizeof(TUInt) / 8; ++i, data += 16) {
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res <<= TUInt(64);
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res += TUInt(unhex_uint<UInt64>(data));
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}
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}
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return res;
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}
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} // namespace doris::vectorized
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