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f63c130c28
Finished documenting flatbuffersbuilder Replaces swift 5.5 with 5.2 packages Starts building the tutorial for xcode 13 Finishes building the tutorial for xcode 13 Removes docc files from old swift versions Updates swift style guide
85 lines
2.9 KiB
Swift
85 lines
2.9 KiB
Swift
/*
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* Copyright 2021 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import Foundation
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/// Mutable is a protocol that allows us to mutate Scalar values within a ``ByteBuffer``
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public protocol Mutable {
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/// makes Flatbuffer accessed within the Protocol
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var bb: ByteBuffer { get }
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/// makes position of the ``Table``/``struct`` accessed within the Protocol
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var postion: Int32 { get }
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}
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extension Mutable {
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/// Mutates the memory in the buffer, this is only called from the access function of ``Table`` and ``struct``
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/// - Parameters:
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/// - value: New value to be inserted to the buffer
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/// - index: index of the Element
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func mutate<T: Scalar>(value: T, o: Int32) -> Bool {
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guard o != 0 else { return false }
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bb.write(value: value, index: Int(o), direct: true)
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return true
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}
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}
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extension Mutable where Self == Table {
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/// Mutates a value by calling mutate with respect to the position in a ``Table``
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/// - Parameters:
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/// - value: New value to be inserted to the buffer
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/// - index: index of the Element
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public func mutate<T: Scalar>(_ value: T, index: Int32) -> Bool {
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guard index != 0 else { return false }
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return mutate(value: value, o: index + postion)
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}
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/// Directly mutates the element by calling mutate
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///
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/// Mutates the Element at index ignoring the current position by calling mutate
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/// - Parameters:
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/// - value: New value to be inserted to the buffer
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/// - index: index of the Element
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public func directMutate<T: Scalar>(_ value: T, index: Int32) -> Bool {
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mutate(value: value, o: index)
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}
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}
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extension Mutable where Self == Struct {
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/// Mutates a value by calling mutate with respect to the position in the struct
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/// - Parameters:
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/// - value: New value to be inserted to the buffer
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/// - index: index of the Element
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public func mutate<T: Scalar>(_ value: T, index: Int32) -> Bool {
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mutate(value: value, o: index + postion)
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}
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/// Directly mutates the element by calling mutate
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///
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/// Mutates the Element at index ignoring the current position by calling mutate
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/// - Parameters:
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/// - value: New value to be inserted to the buffer
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/// - index: index of the Element
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public func directMutate<T: Scalar>(_ value: T, index: Int32) -> Bool {
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mutate(value: value, o: index)
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}
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}
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extension Struct: Mutable {}
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extension Table: Mutable {}
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