1 /* 2 * Copyright 2021 Google Inc. All rights reserved. 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 import Foundation 18 19 extension String: FlatbuffersInitializable { 20 21 /// Initailizes a string from a Flatbuffers ByteBuffer 22 /// - Parameters: 23 /// - bb: ByteBuffer containing the readable string 24 /// - o: Current position 25 public init(_ bb: ByteBuffer, o: Int32) { 26 let count = bb.read(def: Int32.self, position: Int(o)) 27 self = bb.readString( 28 at: Int32(MemoryLayout<Int32>.size) + o, 29 count: count) ?? "" 30 } 31 } 32 33 extension String: ObjectAPIPacker { 34 packnull35 public static func pack(_ builder: inout FlatBufferBuilder, obj: inout String?) -> Offset { 36 guard var obj = obj else { return Offset() } 37 return pack(&builder, obj: &obj) 38 } 39 packnull40 public static func pack(_ builder: inout FlatBufferBuilder, obj: inout String) -> Offset { 41 builder.create(string: obj) 42 } 43 unpacknull44 public mutating func unpack() -> String { 45 self 46 } 47 48 } 49 50 extension String: NativeObject { 51 serialize<T: ObjectAPIPacker>null52 public func serialize<T: ObjectAPIPacker>(type: T.Type) -> ByteBuffer where T.T == Self { 53 fatalError("serialize should never be called from string directly") 54 } 55 serialize<T: ObjectAPIPacker>null56 public func serialize<T: ObjectAPIPacker>(builder: inout FlatBufferBuilder, type: T.Type) -> ByteBuffer where T.T == Self { 57 fatalError("serialize should never be called from string directly") 58 } 59 } 60