83 lines
2.1 KiB
Swift
83 lines
2.1 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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public enum Hex {
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public static func isValid(_ string: String) -> Bool {
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let allowedCharacters = CharacterSet(charactersIn: "0123456789ABCDEF") // stringlint:disable
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return string.uppercased().unicodeScalars.allSatisfy { allowedCharacters.contains($0) }
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}
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}
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// MARK: - Data
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public extension Data {
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var bytes: [UInt8] { return Array(self) }
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func toHexString() -> String {
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return bytes.toHexString()
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}
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init(hex: String) {
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self.init(Array<UInt8>(hex: hex))
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}
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}
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// MARK: - Array
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public extension Array where Element == UInt8 {
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init(hex: String) {
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self = Array<Element>()
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self.reserveCapacity(hex.unicodeScalars.lazy.underestimatedCount)
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var buffer: UInt8?
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var skip = (hex.hasPrefix("0x") ? 2 : 0) // stringlint:disable
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for char in hex.unicodeScalars.lazy {
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guard skip == 0 else {
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skip -= 1
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continue
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}
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guard char.value >= 48 && char.value <= 102 else {
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removeAll()
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return
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}
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let v: UInt8
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let c: UInt8 = UInt8(char.value)
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switch c {
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case let c where c <= 57: v = c - 48
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case let c where c >= 65 && c <= 70: v = c - 55
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case let c where c >= 97: v = c - 87
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default:
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removeAll()
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return
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}
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if let b = buffer {
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append(b << 4 | v)
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buffer = nil
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}
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else {
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buffer = v
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}
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}
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if let b = buffer {
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append(b)
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}
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}
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func toHexString() -> String {
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return map { String(format: "%02x", $0) }.joined() // stringlint:disable
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}
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func toBase64(options: Data.Base64EncodingOptions = []) -> String {
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Data(self).base64EncodedString(options: options)
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}
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}
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