// Copyright 2025 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 "google/cloud/bigtable/internal/crc32c.h"

#include "absl/base/config.h"

#include "absl/crc/crc32c.h"

namespace google {

namespace cloud {

namespace bigtable_internal {

GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN

std::uint32_t ExtendCrc32c(std::uint32_t crc, absl::string_view data) {

return static_cast<std::uint32_t>(

absl::ExtendCrc32c(absl::crc32c_t{crc}, data));

}

std::uint32_t ExtendCrc32c(std::uint32_t crc,

bigtable_internal::ConstBufferSequence const& data) {

for (auto const& b : data) {

crc = ExtendCrc32c(crc, absl::string_view{b.data(), b.size()});

}

return crc;

}

std::uint32_t ExtendCrc32c(std::uint32_t crc, absl::Cord const& data) {

for (auto i = data.chunk_begin(); i != data.chunk_end(); ++i) {

crc = ExtendCrc32c(crc, *i);

}

return crc;

}

std::uint32_t ExtendCrc32c(std::uint32_t crc, absl::string_view data,

std::uint32_t data_crc) {

return static_cast<std::uint32_t>(absl::ConcatCrc32c(

absl::crc32c_t{crc}, absl::crc32c_t{data_crc}, data.size()));

}

std::uint32_t ExtendCrc32c(std::uint32_t crc,

bigtable_internal::ConstBufferSequence const& data,

std::uint32_t data_crc) {

auto const size = bigtable_internal::TotalBytes(data);

return static_cast<std::uint32_t>(

absl::ConcatCrc32c(absl::crc32c_t{crc}, absl::crc32c_t{data_crc}, size));

}

std::uint32_t ExtendCrc32c(std::uint32_t crc, absl::Cord const& data,

std::uint32_t data_crc) {

return static_cast<std::uint32_t>(absl::ConcatCrc32c(

absl::crc32c_t{crc}, absl::crc32c_t{data_crc}, data.size()));

}

GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END

} // namespace bigtable_internal

} // namespace cloud

} // namespace google