11754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato/* 2c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin * Copyright (C) 2017 The Android Open Source Project 31754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * 41754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * Licensed under the Apache License, Version 2.0 (the "License"); 51754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * you may not use this file except in compliance with the License. 61754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * You may obtain a copy of the License at 71754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * 81754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * http://www.apache.org/licenses/LICENSE-2.0 91754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * 101754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * Unless required by applicable law or agreed to in writing, software 111754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * distributed under the License is distributed on an "AS IS" BASIS, 121754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * See the License for the specific language governing permissions and 141754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * limitations under the License. 151754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato */ 161754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 17c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin#ifndef ANDROID_UTIL_PROTOBUF_H 18c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin#define ANDROID_UTIL_PROTOBUF_H 191754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 201754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato#include <stdint.h> 21c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin 22c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jinnamespace android { 23c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jinnamespace util { 2499c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin 25974a9c28853d24ff94f000ae9f5c816d9538897bYi Jinconst int FIELD_ID_SHIFT = 3; 26974a9c28853d24ff94f000ae9f5c816d9538897bYi Jinconst uint8_t WIRE_TYPE_MASK = (1 << FIELD_ID_SHIFT) - 1; 27974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin 2899c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinconst uint8_t WIRE_TYPE_VARINT = 0; 2999c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinconst uint8_t WIRE_TYPE_FIXED64 = 1; 3099c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinconst uint8_t WIRE_TYPE_LENGTH_DELIMITED = 2; 3199c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinconst uint8_t WIRE_TYPE_FIXED32 = 5; 3299c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin 3399c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin/** 3499c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin * Read the wire type from varint, it is the smallest 3 bits. 3599c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin */ 3699c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinuint8_t read_wire_type(uint32_t varint); 3799c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin 3899c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin/** 39974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin * Read field id from varint, it is varint >> 3; 4099c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jin */ 4199c248feb2d1f863b864bdfd1e3b37af17f18732Yi Jinuint32_t read_field_id(uint32_t varint); 421754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 431754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato/** 44974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin * Get the size of a varint. 45974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin */ 46974a9c28853d24ff94f000ae9f5c816d9538897bYi Jinsize_t get_varint_size(uint64_t varint); 47974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin 48974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin/** 491754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato * Write a varint into the buffer. Return the next position to write at. 50974a9c28853d24ff94f000ae9f5c816d9538897bYi Jin * There must be 10 bytes in the buffer. 511754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato */ 52974a9c28853d24ff94f000ae9f5c816d9538897bYi Jinuint8_t* write_raw_varint(uint8_t* buf, uint64_t val); 531754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 541754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato/** 550a3406fc4f8e9a8c8a9155fc7886a0496f692496Yi Jin * Write a protobuf WIRE_TYPE_LENGTH_DELIMITED header. Return the next position 560a3406fc4f8e9a8c8a9155fc7886a0496f692496Yi Jin * to write at. There must be 20 bytes in the buffer. 571754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato */ 581754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onoratouint8_t* write_length_delimited_tag_header(uint8_t* buf, uint32_t fieldId, size_t size); 591754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 60c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin} // util 61c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin} // android 621754d744a7a34731ffc07af1bc3dbfcb06864ab0Joe Onorato 63c23fad2f9079f678eae15338f5e57e2a6bf7e391Yi Jin#endif // ANDROID_UTIL_PROTOUBUF_H 64