chromium/third_party/grpc/src/src/core/ext/transport/chttp2/transport/varint.h

//
//
// Copyright 2015 gRPC authors.
//
// 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
//
//     http://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 GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H
#define GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H

#include <grpc/support/port_platform.h>

#include <stdint.h>
#include <stdlib.h>

#include <grpc/support/log.h>

// Helpers for hpack varint encoding

namespace grpc_core {

// maximum value that can be bitpacked with the opcode if the opcode has a
// prefix of length prefix_bits
constexpr uint32_t MaxInVarintPrefix(uint8_t prefix_bits) { … }

// length of a value that needs varint tail encoding (it's bigger than can be
// bitpacked into the opcode byte) - returned value includes the length of the
// opcode byte
size_t VarintLength(size_t tail_value);
void VarintWriteTail(size_t tail_value, uint8_t* target, size_t tail_length);

template <uint8_t kPrefixBits>
class VarintWriter { … };

}  // namespace grpc_core

#endif  // GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_VARINT_H