407 lines
15 KiB
C++
407 lines
15 KiB
C++
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2.0,
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* as published by the Free Software Foundation.
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*
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* This program is also distributed with certain software (including
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* but not limited to OpenSSL) that is licensed under separate terms,
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* as designated in a particular file or component or in included license
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* documentation. The authors of MySQL hereby grant you an additional
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* permission to link the program and your derivative works with the
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* separately licensed software that they have included with MySQL.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License, version 2.0, for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PLUGIN_X_PROTOCOL_ENCODERS_ENCODING_PRIMITIVES_BASE_H_
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#define PLUGIN_X_PROTOCOL_ENCODERS_ENCODING_PRIMITIVES_BASE_H_
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#include <google/protobuf/wire_format_lite.h>
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#include <cassert>
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#include <cstdint>
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namespace protocol {
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namespace primitives {
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namespace base {
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template <uint64_t length, uint64_t value>
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struct Varint_length_value {
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static void encode(uint8_t *&) {
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static_assert(0 == length, "Length must be grater then zero.");
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static_assert(length,
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"You have specified unsupported version of length, currently "
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"supported 1-10.");
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}
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};
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template <uint64_t value>
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struct Varint_length_value<1, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<2, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<3, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<4, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<5, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<6, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 28) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<7, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 28) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 35) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 42) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<8, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 28) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 35) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 42) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 49) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<9, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 28) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 35) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 42) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 49) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 56) & 0x7F);
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}
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};
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template <uint64_t value>
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struct Varint_length_value<10, value> {
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>((value & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 7) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 14) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 21) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 28) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 35) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 42) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 49) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>(((value >> 56) & 0x7F) | 0x80);
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*(out++) = static_cast<uint8_t>((value >> 63) & 0x7F);
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}
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};
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template <uint64_t length>
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struct Varint_length {
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static void encode(uint8_t *&, const uint64_t) {
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static_assert(0 == length, "Length must be grater then zero.");
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static_assert(length,
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"You have specified unsupported version of length, currently "
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"supported 1-10.");
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}
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};
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template <>
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struct Varint_length<1> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F);
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}
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};
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template <>
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struct Varint_length<2> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F);
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}
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};
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template <>
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struct Varint_length<3> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F);
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}
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};
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template <>
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struct Varint_length<4> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F);
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}
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};
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template <>
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struct Varint_length<5> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F);
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}
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};
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template <>
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struct Varint_length<6> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F);
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}
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};
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template <>
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struct Varint_length<7> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 42) & 0x7F);
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}
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};
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template <>
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struct Varint_length<8> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 42) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 49) & 0x7F);
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}
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};
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template <>
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struct Varint_length<9> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 42) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 49) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 56) & 0x7F);
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}
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};
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template <>
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struct Varint_length<10> {
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static void encode(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 7) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 14) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 21) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 28) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 35) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 42) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 49) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 56) & 0x7F) | 0x80;
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*(out++) = static_cast<uint8_t>((value >> 63) & 0x7F);
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}
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};
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struct Varint {
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template <typename Value_type>
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static void encode(uint8_t *&out, Value_type value) { // NOLINT
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while (value > 0x7F) {
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*(out++) = static_cast<uint8_t>(value & 0x7F) | 0x80;
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value >>= 7;
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}
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*(out++) = static_cast<uint8_t>(value & 0x7F);
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}
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};
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struct Fixint {};
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template <uint32_t length>
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struct Fixint_length {};
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template <>
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struct Fixint_length<1> {
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template <uint8_t value>
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = value;
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}
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static void encode_value(uint8_t *&out, const uint8_t value) { // NOLINT
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*(out++) = value;
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}
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};
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template <>
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struct Fixint_length<4> {
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template <uint32_t value>
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>(value);
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*(out++) = static_cast<uint8_t>(value >> 8);
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*(out++) = static_cast<uint8_t>(value >> 16);
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*(out++) = static_cast<uint8_t>(value >> 24);
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}
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static void encode_value(uint8_t *&out, const uint32_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value);
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*(out++) = static_cast<uint8_t>(value >> 8);
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*(out++) = static_cast<uint8_t>(value >> 16);
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*(out++) = static_cast<uint8_t>(value >> 24);
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}
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};
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template <>
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struct Fixint_length<8> {
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template <uint64_t value>
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static void encode(uint8_t *&out) { // NOLINT
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*(out++) = static_cast<uint8_t>(value);
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*(out++) = static_cast<uint8_t>(value >> 8);
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*(out++) = static_cast<uint8_t>(value >> 16);
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*(out++) = static_cast<uint8_t>(value >> 24);
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*(out++) = static_cast<uint8_t>(value >> 32);
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*(out++) = static_cast<uint8_t>(value >> 40);
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*(out++) = static_cast<uint8_t>(value >> 48);
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*(out++) = static_cast<uint8_t>(value >> 56);
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}
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static void encode_value(uint8_t *&out, const uint64_t value) { // NOLINT
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*(out++) = static_cast<uint8_t>(value);
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*(out++) = static_cast<uint8_t>(value >> 8);
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*(out++) = static_cast<uint8_t>(value >> 16);
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*(out++) = static_cast<uint8_t>(value >> 24);
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*(out++) = static_cast<uint8_t>(value >> 32);
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*(out++) = static_cast<uint8_t>(value >> 40);
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*(out++) = static_cast<uint8_t>(value >> 48);
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*(out++) = static_cast<uint8_t>(value >> 56);
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}
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};
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class Helper {
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public:
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using WireType = google::protobuf::internal::WireFormatLite::WireType;
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static constexpr uint32_t encode_field_tag(const uint32_t field_no,
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const WireType wt) {
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return static_cast<uint32_t>(
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field_no << ::google::protobuf::internal::WireFormatLite::kTagTypeBits |
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wt);
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}
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static constexpr uint64_t encode_zigzag(const int64_t value) {
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return static_cast<uint64>(value >> 63) ^ (static_cast<uint64>(value) << 1);
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}
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static constexpr uint32_t encode_zigzag(const int32_t value) {
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return (value >> 31) ^ (value << 1);
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}
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constexpr static int get_varint_length(const uint64_t value, uint64_t shift,
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uint8_t level) {
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return (value < shift) ? level
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: get_varint_length(value, shift << 7, level + 1);
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}
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static int get_varint_length(const uint64_t value) {
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|
if (value < 0x0000000000000080) return 1;
|
|
if (value < 0x0000000000004000) return 2;
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|
if (value < 0x0000000000200000) return 3;
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|
if (value < 0x0000000010000000) return 4;
|
|
if (value < 0x0000000800000000) return 5;
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|
if (value < 0x0000040000000000) return 6;
|
|
if (value < 0x0002000000000000) return 7;
|
|
if (value < 0x0100000000000000) return 8;
|
|
if (value < 0x8000000000000000) return 9;
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|
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return 10;
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}
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};
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} // namespace base
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} // namespace primitives
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} // namespace protocol
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#endif // PLUGIN_X_PROTOCOL_ENCODERS_ENCODING_PRIMITIVES_BASE_H_
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