1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "adb_unique_fd.h" 20 #include "fastdeploy/proto/ApkEntry.pb.h" 21 22 /** 23 * Helper class that mirrors the PatchUtils from deploy agent. 24 */ 25 class PatchUtils { 26 public: 27 /** 28 * This function takes the dump of Central Directly and builds the APKMetaData required by the 29 * patching algorithm. The if this function has an error a string is printed to the terminal and 30 * exit(1) is called. 31 */ 32 static com::android::fastdeploy::APKMetaData GetDeviceAPKMetaData( 33 const com::android::fastdeploy::APKDump& apk_dump); 34 /** 35 * This function takes a local APK file and builds the APKMetaData required by the patching 36 * algorithm. The if this function has an error a string is printed to the terminal and exit(1) 37 * is called. 38 */ 39 static com::android::fastdeploy::APKMetaData GetHostAPKMetaData(const char* file); 40 /** 41 * Writes a fixed signature string to the header of the patch. 42 */ 43 static void WriteSignature(android::base::borrowed_fd output); 44 /** 45 * Writes an int64 to the |output| reversing the bytes. 46 */ 47 static void WriteLong(int64_t value, android::base::borrowed_fd output); 48 /** 49 * Writes string to the |output|. 50 */ 51 static void WriteString(const std::string& value, android::base::borrowed_fd output); 52 /** 53 * Copy |amount| of data from |input| to |output|. 54 */ 55 static void Pipe(android::base::borrowed_fd input, android::base::borrowed_fd output, 56 size_t amount); 57 }; 58