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6caea5386b
Adds a new swift_Backtracing library, with a corresponding _Backtracing module, to the build. Also add some tests. This is not public API at this point, but will be used by the external backtracing program, `swift-backtrace`. rdar://104336548
33 lines
1.2 KiB
Swift
33 lines
1.2 KiB
Swift
//===--- Utils.swift - Utility functions ----------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2023 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Utility functions that are used in the backtracing library.
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//
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//===----------------------------------------------------------------------===//
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import Swift
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internal func hex<T: FixedWidthInteger>(_ value: T,
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withPrefix: Bool = true) -> String {
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let digits = String(value, radix: 16)
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let padTo = value.bitWidth / 4
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let padding = digits.count >= padTo ? "" : String(repeating: "0",
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count: padTo - digits.count)
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let prefix = withPrefix ? "0x" : ""
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return "\(prefix)\(padding)\(digits)"
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}
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internal func hex(_ bytes: [UInt8]) -> String {
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return bytes.map{ hex($0, withPrefix: false) }.joined(separator: "")
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}
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