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bytes.h
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// 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.
#ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_BYTES_H
#define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_BYTES_H
#include "google/cloud/bigtable/version.h"
#include "google/cloud/status_or.h"
#include <array>
#include <cstddef>
#include <ostream>
#include <string>
namespace google {
namespace cloud {
namespace bigtable_internal {
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
struct BytesInternals;
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
} // namespace bigtable_internal
namespace bigtable {
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN
/**
* A representation of the Bigtable BYTES type: variable-length binary data.
*
* A `Bytes` value can be constructed from, and converted to any sequence of
* octets. `Bytes` values can be compared for equality.
*/
class Bytes {
public:
/// An empty sequence.
Bytes() = default;
/// Stops copying at the null-terminator character from input bytes.
explicit Bytes(char const* bytes) : bytes_(bytes) {}
/// @name Construction from a sequence of octets.
///@{
template <typename InputIt>
Bytes(InputIt first, InputIt last) {
bytes_ = std::string(first, last);
}
template <typename Container>
explicit Bytes(Container const& c) : Bytes(std::begin(c), std::end(c)) {}
///@}
/// Conversion to a sequence of octets. The `Container` must support
/// construction from a range specified as a pair of input iterators.
template <typename Container>
Container get() const {
return bytes_;
}
/// @name Relational operators
///@{
friend bool operator==(Bytes const& a, Bytes const& b) {
return a.bytes_ == b.bytes_;
}
friend bool operator!=(Bytes const& a, Bytes const& b) { return !(a == b); }
friend bool operator<(Bytes const& a, Bytes const& b) {
return a.bytes_ < b.bytes_;
}
friend bool operator>=(Bytes const& a, Bytes const& b) { return !(a < b); }
friend bool operator>(Bytes const& a, Bytes const& b) { return b < a; }
friend bool operator<=(Bytes const& a, Bytes const& b) { return !(b < a); }
///@}
/**
* Outputs string representation of the Bytes to the provided stream.
*
* @warning This is intended for debugging and human consumption only, not
* machine consumption, as the output format may change without notice.
*/
friend std::ostream& operator<<(std::ostream& os, Bytes const& bytes);
private:
friend struct bigtable_internal::BytesInternals;
std::string bytes_; // raw bytes
};
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
} // namespace bigtable
} // namespace cloud
} // namespace google
template <>
struct std::hash<google::cloud::bigtable::Bytes> {
std::size_t operator()(
google::cloud::bigtable::Bytes const& b) const noexcept {
return std::hash<std::string>()(b.get<std::string>());
}
};
#endif // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_BIGTABLE_BYTES_H