forked from BigfootDev/flatbuffers
5a95b7b6bc
* Offical Swift port for FlexBuffers This is the offical port for FlexBuffers within swift, and it introcudes a Common Module where code is shared between flatbuffers and flexbuffers. Writing most supported values like maps, vectors, nil and scalars into a flexbuffer buffer. And includes tests to verify that its similar to cpp * Reading a flexbuffer Implementing reading from a flexbuffer, enabling most of the buffers features, like most types, maps, vectors, typedvectors, and fixedtypedvectors. Currently, if an offset/object cant be read we default to a swift nil instead of the default flexbuffers 'null' with all values. * Fixes bazel breaking due to new project structure Address warnings within the library * Adds comment on why we added the code & properly enforce the amout of bytes needed
108 lines
2.5 KiB
Swift
108 lines
2.5 KiB
Swift
/*
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* Copyright 2024 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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/// A boolean to see if the system is littleEndian
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public let isLitteEndian: Bool = {
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let number: UInt32 = 0x12345678
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return number == number.littleEndian
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}()
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/// Constant for the file id length
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public let FileIdLength = 4
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/// Protocol that All Scalars should conform to
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///
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/// Scalar is used to conform all the numbers that can be represented in a FlatBuffer. It's used to write/read from the buffer.
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public protocol Scalar: Equatable {
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associatedtype NumericValue
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var convertedEndian: NumericValue { get }
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}
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extension Scalar where Self: FixedWidthInteger {
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/// Converts the value from BigEndian to LittleEndian
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///
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/// Converts values to little endian on machines that work with BigEndian, however this is NOT TESTED yet.
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public var convertedEndian: NumericValue {
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self as! Self.NumericValue
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}
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}
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extension Double: Scalar {
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public typealias NumericValue = UInt64
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public var convertedEndian: UInt64 {
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bitPattern.littleEndian
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}
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}
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extension Float32: Scalar {
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public typealias NumericValue = UInt32
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public var convertedEndian: UInt32 {
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bitPattern.littleEndian
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}
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}
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extension Bool: Scalar {
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public var convertedEndian: UInt8 {
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self == true ? 1 : 0
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}
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public typealias NumericValue = UInt8
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}
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extension Int: Scalar {
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public typealias NumericValue = Int
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}
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extension Int8: Scalar {
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public typealias NumericValue = Int8
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}
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extension Int16: Scalar {
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public typealias NumericValue = Int16
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}
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extension Int32: Scalar {
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public typealias NumericValue = Int32
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}
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extension Int64: Scalar {
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public typealias NumericValue = Int64
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}
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extension UInt: Scalar {
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public typealias NumericValue = UInt
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}
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extension UInt8: Scalar {
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public typealias NumericValue = UInt8
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}
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extension UInt16: Scalar {
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public typealias NumericValue = UInt16
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}
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extension UInt32: Scalar {
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public typealias NumericValue = UInt32
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}
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extension UInt64: Scalar {
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public typealias NumericValue = UInt64
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}
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