formats/jpeg/box_header.h

// Copyright 2026 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 THIRD_PARTY_CREDENTIO_FORMATS_JPEG_BOX_HEADER_H_
#define THIRD_PARTY_CREDENTIO_FORMATS_JPEG_BOX_HEADER_H_

#include <cstdint>
#include <iosfwd>
#include <string>

#include "absl/status/statusor.h"
#include "riegeli/bytes/reader.h"

namespace credentio {
struct JpegBoxHeader {
  uint16_t type;              // The marker of the box.
  uint64_t offset;            // The offset of the box in the file.
  uint64_t size;              // The size of the box (including the marker).
  std::string label() const;  // The human-readable box type (marker).

  friend bool operator==(const JpegBoxHeader&, const JpegBoxHeader&) = default;
};

void PrintTo(const JpegBoxHeader& x, ::std::ostream* os);

// Reads and returns the box header.
absl::StatusOr<JpegBoxHeader> ConsumeJpegBoxHeader(riegeli::Reader& input);
}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_FORMATS_JPEG_BOX_HEADER_H_