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// Copyright (C) 2023 Google LLC
//
// 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
//
// http://www.apache.org/licenses/LICENSE-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 OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ICING_STORE_NAMESPACE_FINGERPRINT_IDENTIFIER_H_
#define ICING_STORE_NAMESPACE_FINGERPRINT_IDENTIFIER_H_
#include <cstdint>
#include <string>
#include <string_view>
#include "icing/text_classifier/lib3/utils/base/statusor.h"
#include "icing/store/namespace-id.h"
namespace icing {
namespace lib {
class NamespaceFingerprintIdentifier {
public:
static constexpr int kEncodedNamespaceIdLength = 3;
static constexpr int kMinEncodedLength = kEncodedNamespaceIdLength + 1;
static libtextclassifier3::StatusOr<NamespaceFingerprintIdentifier>
DecodeFromCString(std::string_view encoded_cstr);
explicit NamespaceFingerprintIdentifier()
: namespace_id_(0), fingerprint_(0) {}
explicit NamespaceFingerprintIdentifier(NamespaceId namespace_id,
uint64_t fingerprint)
: namespace_id_(namespace_id), fingerprint_(fingerprint) {}
explicit NamespaceFingerprintIdentifier(NamespaceId namespace_id,
std::string_view target_str);
std::string EncodeToCString() const;
bool operator<(const NamespaceFingerprintIdentifier& other) const {
if (namespace_id_ != other.namespace_id_) {
return namespace_id_ < other.namespace_id_;
}
return fingerprint_ < other.fingerprint_;
}
bool operator==(const NamespaceFingerprintIdentifier& other) const {
return namespace_id_ == other.namespace_id_ &&
fingerprint_ == other.fingerprint_;
}
NamespaceId namespace_id() const { return namespace_id_; }
uint64_t fingerprint() const { return fingerprint_; }
private:
NamespaceId namespace_id_;
uint64_t fingerprint_;
} __attribute__((packed));
static_assert(sizeof(NamespaceFingerprintIdentifier) == 10, "");
} // namespace lib
} // namespace icing
#endif // ICING_STORE_NAMESPACE_FINGERPRINT_IDENTIFIER_H_
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