forked from BigfootDev/flatbuffers
4d6a7aa8b7
Formats the swift project Update Sample files Update docc documentation Updates swift docs in the website Updates code for Wasm
89 lines
2.9 KiB
Swift
89 lines
2.9 KiB
Swift
/*
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* Copyright 2023 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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#if !os(WASI)
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import Foundation
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#else
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import SwiftOverlayShims
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#endif
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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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