/*
* Copyright 2023 Google Inc. All rights reserved.
*
* 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.
*/
#if !os(WASI)
import Foundation
#else
import SwiftOverlayShims
#endif
/// Struct is a representation of a mutable `Flatbuffers` struct
/// since native structs are value types and cant be mutated
@frozen
public struct Struct {
/// Hosting Bytebuffer
public private(set) var bb: ByteBuffer
/// Current position of the struct
public private(set) var postion: Int32
/// Initializer for a mutable flatbuffers struct
/// - Parameters:
/// - bb: Current hosting Bytebuffer
/// - position: Current position for the struct in the ByteBuffer
public init(bb: ByteBuffer, position: Int32 = 0) {
self.bb = bb
postion = position
}
/// Reads data from the buffer directly at offset O
/// - Parameters:
/// - type: Type of data to be read
/// - o: Current offset of the data
/// - Returns: Data of Type T that conforms to type Scalar
public func readBuffer<T: Scalar>(of type: T.Type, at o: Int32) -> T {
let r = bb.read(def: T.self, position: Int(o + postion))
return r
}
}