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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "input.h"
#include <vector>
struct LZ4F_dctx_s;
namespace vespalib {
/**
* Input filter decompressing data stored in framed lz4 format.
**/
class Lz4InputDecoder : public Input
{
private:
Input &_input;
std::vector<char> _buffer;
size_t _used;
size_t _pos;
bool _eof;
bool _failed;
vespalib::string _reason;
LZ4F_dctx_s *_ctx;
void fail(const char *reason);
void decode_more();
public:
Lz4InputDecoder(Input &input, size_t buffer_size);
~Lz4InputDecoder();
Memory obtain() override;
Input &evict(size_t bytes) override;
bool failed() const { return _failed; }
const vespalib::string &reason() const { return _reason; }
};
} // namespace vespalib
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