chromium/net/third_party/quiche/src/quiche/common/quiche_data_writer.h

// Copyright (c) 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef QUICHE_COMMON_QUICHE_DATA_WRITER_H_
#define QUICHE_COMMON_QUICHE_DATA_WRITER_H_

#include <cstddef>
#include <cstdint>
#include <cstring>
#include <limits>

#include "absl/strings/string_view.h"
#include "quiche/common/platform/api/quiche_export.h"
#include "quiche/common/platform/api/quiche_logging.h"
#include "quiche/common/quiche_endian.h"

namespace quiche {

// Maximum value that can be properly encoded using RFC 9000 62-bit Variable
// Length Integer encoding.
enum : uint64_t { … };

// RFC 9000 62-bit Variable Length Integer encoding masks
// If a uint64_t anded with a mask is not 0 then the value is encoded
// using that length (or is too big, in the case of kVarInt62ErrorMask).
// Values must be checked in order (error, 8-, 4-, and then 2- bytes)
// and if none are non-0, the value is encoded in 1 byte.
enum : uint64_t { … };

// This class provides facilities for packing binary data.
//
// The QuicheDataWriter supports appending primitive values (int, string, etc)
// to a frame instance.  The internal memory buffer is exposed as the "data"
// of the QuicheDataWriter.
class QUICHE_EXPORT QuicheDataWriter { … };

}  // namespace quiche

#endif  // QUICHE_COMMON_QUICHE_DATA_WRITER_H_