42 lines
1.1 KiB
Swift
42 lines
1.1 KiB
Swift
//
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// File.swift
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// ZcashLightClientKit
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//
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// Created by Francisco Gindre on 12/13/19.
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//
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import Foundation
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import CommonCrypto
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/**
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Thanks Stack Overflow (once again) https://stackoverflow.com/questions/39075043/how-to-convert-data-to-hex-string-in-swift
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*/
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struct HexEncodingOptions: OptionSet {
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public static let upperCase = HexEncodingOptions(rawValue: 1 << 0)
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public let rawValue: Int
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public init(rawValue: Int) {
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self.rawValue = rawValue
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}
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}
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extension Data {
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func hexEncodedString(options: HexEncodingOptions = []) -> String {
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z_hexEncodedString(data: self, options: options)
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}
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}
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func z_hexEncodedString(data: Data, options: HexEncodingOptions = []) -> String {
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let hexDigits = Array((options.contains(.upperCase) ? "0123456789ABCDEF" : "0123456789abcdef").utf16)
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var chars: [unichar] = []
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chars.reserveCapacity(2 * data.count)
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for byte in data {
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chars.append(hexDigits[Int(byte / 16)])
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chars.append(hexDigits[Int(byte % 16)])
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}
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return String(utf16CodeUnits: chars, count: chars.count)
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}
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