89eae00479
* Switch license file to AGPL * Update file copyright headers * Update the default project file header
34 lines
862 B
Swift
34 lines
862 B
Swift
//
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// Copyright 2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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import Foundation
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extension Data {
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init?(hexString: String) {
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self.init()
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var hex = hexString
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// If the hex string has an odd length, prepend a zero
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if hex.count % 2 != 0 {
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hex = "0" + hex
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}
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for i in stride(from: 0, to: hex.count, by: 2) {
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let startIndex = hex.index(hex.startIndex, offsetBy: i)
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let endIndex = hex.index(hex.startIndex, offsetBy: i + 2)
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let byteString = String(hex[startIndex..<endIndex])
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if let byte = UInt8(byteString, radix: 16) {
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append(byte)
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} else {
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return nil
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}
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}
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}
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}
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