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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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 ANDROID_UTIL_PROTOBUF_H
#define ANDROID_UTIL_PROTOBUF_H
#include <stdint.h>
namespace android {
namespace util {
using namespace std;
const int FIELD_ID_SHIFT = 3;
const uint8_t WIRE_TYPE_MASK = (1 << FIELD_ID_SHIFT) - 1;
const uint8_t WIRE_TYPE_VARINT = 0;
const uint8_t WIRE_TYPE_FIXED64 = 1;
const uint8_t WIRE_TYPE_LENGTH_DELIMITED = 2;
const uint8_t WIRE_TYPE_FIXED32 = 5;
/**
* Read the wire type from varint, it is the smallest 3 bits.
*/
uint8_t read_wire_type(uint32_t varint);
/**
* Read field id from varint, it is varint >> 3;
*/
uint32_t read_field_id(uint32_t varint);
/**
* Get the size of a varint.
*/
size_t get_varint_size(uint64_t varint);
/**
* Write a varint into the buffer. Return the next position to write at.
* There must be 10 bytes in the buffer.
*/
uint8_t* write_raw_varint(uint8_t* buf, uint64_t val);
/**
* Write a protobuf WIRE_TYPE_LENGTH_DELIMITED header. Return the next position
* to write at. There must be 20 bytes in the buffer.
*/
uint8_t* write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size);
} // util
} // android
#endif // ANDROID_UTIL_PROTOUBUF_H
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