89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
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/*
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* Subspace.cpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Subspace.h"
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Subspace::Subspace(Tuple const& tuple, StringRef const& rawPrefix){
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StringRef packed = tuple.pack();
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this->rawPrefix.reserve(this->rawPrefix.arena(), rawPrefix.size() + packed.size());
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this->rawPrefix.append(this->rawPrefix.arena(), rawPrefix.begin(), rawPrefix.size());
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this->rawPrefix.append(this->rawPrefix.arena(), packed.begin(), packed.size());
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}
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Subspace::Subspace(Tuple const& tuple, Standalone<VectorRef<uint8_t>> const& rawPrefix) {
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this->rawPrefix.reserve(this->rawPrefix.arena(), rawPrefix.size() + tuple.pack().size());
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this->rawPrefix.append(this->rawPrefix.arena(), rawPrefix.begin(), rawPrefix.size());
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this->rawPrefix.append(this->rawPrefix.arena(), tuple.pack().begin(), tuple.pack().size());
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}
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Subspace::Subspace(StringRef const& rawPrefix){
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this->rawPrefix.append(this->rawPrefix.arena(), rawPrefix.begin(), rawPrefix.size());
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}
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Subspace::~Subspace() { }
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Key Subspace::key() const {
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return StringRef(rawPrefix.begin(), rawPrefix.size());
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}
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Key Subspace::pack(const Tuple& tuple) const {
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return tuple.pack().withPrefix(StringRef(rawPrefix.begin(), rawPrefix.size()));
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}
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Tuple Subspace::unpack(StringRef const& key) const {
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if (!contains(key)) {
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throw key_not_in_subspace();
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}
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return Tuple::unpack(key.substr(rawPrefix.size()));
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}
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KeyRange Subspace::range(Tuple const& tuple) const {
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VectorRef<uint8_t> begin;
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VectorRef<uint8_t> end;
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KeyRange keyRange;
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begin.reserve(keyRange.arena(), rawPrefix.size() + tuple.pack().size() + 1);
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begin.append(keyRange.arena(), rawPrefix.begin(), rawPrefix.size());
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begin.append(keyRange.arena(), tuple.pack().begin(), tuple.pack().size());
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begin.push_back(keyRange.arena(), uint8_t('\x00'));
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end.reserve(keyRange.arena(), rawPrefix.size() + tuple.pack().size() + 1);
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end.append(keyRange.arena(), rawPrefix.begin(), rawPrefix.size());
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end.append(keyRange.arena(), tuple.pack().begin(), tuple.pack().size());
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end.push_back(keyRange.arena(), uint8_t('\xff'));
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// FIXME: test that this uses the keyRange arena and doesn't create another one
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keyRange.KeyRangeRef::operator=(KeyRangeRef(StringRef(begin.begin(), begin.size()), StringRef(end.begin(), end.size())));
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return keyRange;
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}
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bool Subspace::contains(KeyRef const& key) const {
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return key.startsWith(StringRef(rawPrefix.begin(), rawPrefix.size()));
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}
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Subspace Subspace::subspace(Tuple const& tuple) const {
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return Subspace(tuple, rawPrefix);
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}
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Subspace Subspace::get(Tuple const& tuple) const {
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return subspace(tuple);
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}
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