115 lines
2.9 KiB
Swift
115 lines
2.9 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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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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let FileIdLength = 4
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/// Type aliases
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public typealias Byte = UInt8
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public typealias UOffset = UInt32
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public typealias SOffset = Int32
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public typealias VOffset = UInt16
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/// Maximum size for a buffer
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public let FlatBufferMaxSize = UInt32
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.max << ((MemoryLayout<SOffset>.size * 8 - 1) - 1)
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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: Verifiable {}
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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, Verifiable {
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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, Verifiable {
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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, Verifiable {
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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, Verifiable {
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public typealias NumericValue = Int
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}
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extension Int8: Scalar, Verifiable {
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public typealias NumericValue = Int8
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}
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extension Int16: Scalar, Verifiable {
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public typealias NumericValue = Int16
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}
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extension Int32: Scalar, Verifiable {
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public typealias NumericValue = Int32
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}
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extension Int64: Scalar, Verifiable {
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public typealias NumericValue = Int64
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}
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extension UInt8: Scalar, Verifiable {
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public typealias NumericValue = UInt8
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}
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extension UInt16: Scalar, Verifiable {
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public typealias NumericValue = UInt16
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}
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extension UInt32: Scalar, Verifiable {
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public typealias NumericValue = UInt32
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}
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extension UInt64: Scalar, Verifiable {
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public typealias NumericValue = UInt64
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}
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public func FlatBuffersVersion_24_3_25() {}
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