1 /* 2 * Copyright 2024 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 /// Struct is a representation of a mutable `Flatbuffers` struct 20 /// since native structs are value types and cant be mutated 21 @frozen 22 public struct Struct { 23 24 /// Hosting Bytebuffer 25 public private(set) var bb: ByteBuffer 26 /// Current position of the struct 27 public private(set) var position: Int32 28 29 /// Initializer for a mutable flatbuffers struct 30 /// - Parameters: 31 /// - bb: Current hosting Bytebuffer 32 /// - position: Current position for the struct in the ByteBuffer 33 public init(bb: ByteBuffer, position: Int32 = 0) { 34 self.bb = bb 35 self.position = position 36 } 37 38 /// Reads data from the buffer directly at offset O 39 /// - Parameters: 40 /// - type: Type of data to be read 41 /// - o: Current offset of the data 42 /// - Returns: Data of Type T that conforms to type Scalar readBuffer<T: Scalar>null43 public func readBuffer<T: Scalar>(of type: T.Type, at o: Int32) -> T { 44 let r = bb.read(def: T.self, position: Int(o + position)) 45 return r 46 } 47 } 48