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- /*
- * Tencent is pleased to support the open source community by making wwsearch
- * available.
- *
- * Copyright (C) 2018-present Tencent. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * https://opensource.org/licenses/Apache-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OF ANY KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations under the License.
- */
- #pragma once
- #include "doc_iterator.h"
- #include "search_slice.h"
- #include "serialize.h"
- #include "storage_type.h"
- namespace wwsearch {
- // 1 byte in header
- // no order insert.
- struct DocListHeader {
- // version = 0 -> default,fixed size
- uint8_t version : 4;
- // flag for version used
- uint8_t flag : 3;
- uint8_t extend : 1;
- DocListHeader() : version(0), flag(0), extend(0) {}
- } __attribute__((packed));
- typedef uint8_t DocumentState;
- enum kDocumentIDState { kDocumentStateOK = 0, kDocumentStateDelete = 1 };
- class DocListWriterCodec : public SerializeAble {
- public:
- virtual ~DocListWriterCodec() {}
- virtual void AddDocID(const DocumentID& doc_id, DocumentState state) = 0;
- virtual std::string DebugString() = 0;
- };
- class DocListReaderCodec : public DocIdSetIterator {
- private:
- size_t priority_; // used for merge.
- public:
- virtual ~DocListReaderCodec() {}
- virtual DocumentState& State() = 0;
- inline void SetPriority(size_t v) { this->priority_ = v; }
- inline size_t GetPriority() { return this->priority_; }
- private:
- };
- typedef bool (*DocListReaderCodecGreater)(DocListReaderCodec* left,
- DocListReaderCodec* right);
- } // namespace wwsearch
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