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PackagePlugin: silence a deprecation warning on Windows #7109

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Merged
merged 1 commit into from
Nov 27, 2023
Merged

PackagePlugin: silence a deprecation warning on Windows #7109

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14 changes: 14 additions & 0 deletions Sources/PackagePlugin/Plugin.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,16 @@ internal func close(_ fd: CInt) -> CInt {
internal func fileno(_ fh: UnsafeMutablePointer<FILE>?) -> CInt {
return _fileno(fh)
}

internal func strerror(_ errno: CInt) -> String? {
// MSDN indicates that the returned string can have a maximum of 94
// characters, so allocate 95 characters.
return withUnsafeTemporaryAllocation(of: wchar_t.self, capacity: 95) {
let result = _wcserror_s($0.baseAddress, $0.count, errno)
guard result == 0, let baseAddress = $0.baseAddress else { return nil }
return String(decodingCString: baseAddress, as: UTF16.self)
}
}
#endif

//
Expand Down Expand Up @@ -267,8 +277,12 @@ extension Plugin {

// Private function to construct an error message from an `errno` code.
fileprivate static func describe(errno: Int32) -> String {
#if os(Windows)
return strerror(errno) ?? String(errno)
#else
if let cStr = strerror(errno) { return String(cString: cStr) }
return String(describing: errno)
#endif
}
}

Expand Down