chromium/net/third_party/quiche/src/quiche/quic/core/quic_utils.h

// Copyright (c) 2012 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_QUIC_CORE_QUIC_UTILS_H_
#define QUICHE_QUIC_CORE_QUIC_UTILS_H_

#include <cstddef>
#include <cstdint>
#include <initializer_list>
#include <optional>
#include <string>
#include <type_traits>

#include "absl/numeric/bits.h"
#include "absl/numeric/int128.h"
#include "absl/strings/str_cat.h"
#include "absl/strings/string_view.h"
#include "absl/types/span.h"
#include "quiche/quic/core/crypto/quic_random.h"
#include "quiche/quic/core/frames/quic_frame.h"
#include "quiche/quic/core/quic_connection_id.h"
#include "quiche/quic/core/quic_error_codes.h"
#include "quiche/quic/core/quic_types.h"
#include "quiche/quic/core/quic_versions.h"
#include "quiche/quic/platform/api/quic_export.h"
#include "quiche/quic/platform/api/quic_socket_address.h"
#include "quiche/common/platform/api/quiche_mem_slice.h"

namespace quic {

class QUICHE_EXPORT QuicUtils { … };

// Returns true if the specific ID is a valid WebTransport session ID that our
// implementation can process.
bool IsValidWebTransportSessionId(WebTransportSessionId id,
                                  ParsedQuicVersion transport_version);

QuicByteCount MemSliceSpanTotalSize(absl::Span<quiche::QuicheMemSlice> span);

// Computes a SHA-256 hash and returns the raw bytes of the hash.
QUICHE_EXPORT std::string RawSha256(absl::string_view input);

// BitMask<Index, Mask> is a set of elements of type `Index` represented as a
// bitmask of an underlying integer type `Mask` (uint64_t by default). The
// underlying type has to be large enough to fit all possible values of `Index`.
template <typename Index, typename Mask = uint64_t>
class QUICHE_EXPORT BitMask { … };

// Ensure that the BitMask constructor can be evaluated as constexpr.
static_assert …;

}  // namespace quic

#endif  // QUICHE_QUIC_CORE_QUIC_UTILS_H_