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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "fakeword.h"
#include "fakeposting.h"
#include <vespa/searchlib/bitcompression/compression.h>
#include <vespa/searchlib/bitcompression/posocccompression.h>
#include <vespa/searchlib/diskindex/zc4_posting_params.h>
namespace search::fakedata {
/*
* YST style compression of docid list.
*/
class FakeZcFilterOcc : public FakePosting
{
protected:
size_t _docIdsSize;
size_t _l1SkipSize;
size_t _l2SkipSize;
size_t _l3SkipSize;
size_t _l4SkipSize;
unsigned int _hitDocs;
uint32_t _lastDocId;
uint64_t _compressedBits;
std::pair<uint64_t *, size_t> _compressed;
vespalib::alloc::Alloc _compressedAlloc;
uint64_t _featuresSize;
const bitcompression::PosOccFieldsParams &_fieldsParams;
bool _bigEndian;
diskindex::Zc4PostingParams _posting_params;
protected:
void setup(const FakeWord &fw);
template <bool bigEndian>
void setupT(const FakeWord &fw);
template <bool bigEndian>
void read_header();
void validate_read(const FakeWord &fw) const;
template <bool bigEndian>
void validate_read(const FakeWord &fw) const;
public:
explicit FakeZcFilterOcc(const FakeWord &fw);
FakeZcFilterOcc(const FakeWord &fw,
bool bigEndian,
const diskindex::Zc4PostingParams &posting_params,
const char *nameSuffix);
~FakeZcFilterOcc() override;
static void forceLink();
size_t bitSize() const override;
bool hasWordPositions() const override;
bool has_interleaved_features() const override;
size_t skipBitSize() const override;
size_t l1SkipBitSize() const override;
size_t l2SkipBitSize() const override;
size_t l3SkipBitSize() const override;
size_t l4SkipBitSize() const override;
int lowLevelSinglePostingScan() const override;
int lowLevelSinglePostingScanUnpack() const override;
int lowLevelAndPairPostingScan(const FakePosting &rhs) const override;
int lowLevelAndPairPostingScanUnpack(const FakePosting &rhs) const override;
std::unique_ptr<queryeval::SearchIterator> createIterator(const fef::TermFieldMatchDataArray &matchData) const override;
};
}
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