// Copyright 2024 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

//

// https://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.

#include "internal/string_pool.h"

#include <cstring> // IWYU pragma: keep

#include <string> // IWYU pragma: keep

#include "absl/base/optimization.h"

#include "absl/strings/string_view.h"

#include "google/protobuf/arena.h"

namespace cel::internal {

absl::string_view StringPool::InternString(absl::string_view string) {

if (string.empty()) {

return "";

}

return *strings_.lazy_emplace(string, [&](const auto& ctor) {

ABSL_ASSUME(arena_ != nullptr);

char* data = google::protobuf::Arena::CreateArray<char>(arena_, string.size());

std::memcpy(data, string.data(), string.size());

ctor(absl::string_view(data, string.size()));

});

}

} // namespace cel::internal