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53 lines
1.4 KiB
Swift
53 lines
1.4 KiB
Swift
// RUN: %target-run-simple-swift
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// REQUIRES: executable_test
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// REQUIRES: synchronization
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import Synchronization
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import StdlibUnittest
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let suite = TestSuite("WordPairTests")
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struct UIntPair: Equatable {
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var first: UInt
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var second: UInt
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init(_ first: UInt, _ second: UInt) {
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self.first = first
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self.second = second
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}
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}
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@available(SwiftStdlib 6.0, *)
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func componentsInMemoryOrder(of dword: WordPair) -> UIntPair {
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let p = UnsafeMutableRawPointer.allocate(
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byteCount: MemoryLayout<WordPair>.size,
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alignment: MemoryLayout<WordPair>.alignment)
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p.storeBytes(of: dword, as: WordPair.self)
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let first = p.load(as: UInt.self)
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let second = p.load(fromByteOffset: MemoryLayout<UInt>.stride, as: UInt.self)
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return UIntPair(first, second)
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}
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if #available(SwiftStdlib 6.0, *) {
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suite.test("basics") {
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expectEqual(MemoryLayout<WordPair>.size, 2 * MemoryLayout<UInt>.size)
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expectEqual(MemoryLayout<WordPair>.stride, MemoryLayout<WordPair>.size)
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//expectEqual(MemoryLayout<WordPair>.alignment, 2 * MemoryLayout<UInt>.alignment)
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let value0 = WordPair(first: 2, second: 1)
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#if _endian(little)
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expectEqual(componentsInMemoryOrder(of: value0), UIntPair(2, 1))
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#else
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expectEqual(componentsInMemoryOrder(of: value0), UIntPair(1, 2))
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#endif
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let value1 = WordPair(first: .max, second: 0)
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expectEqual(value1.first, .max)
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expectEqual(value1.second, 0)
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}
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} // if #available(SwiftStdlib 6.0, *)
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runAllTests()
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