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FoundationEssentials: strip leading / #627

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merged 1 commit into from
May 29, 2024
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FoundationEssentials: strip leading / #627

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23 changes: 21 additions & 2 deletions Sources/FoundationEssentials/String/String+Internals.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,17 @@ extension String {
return try block(buffer.baseAddress!)
}
#else
try self.withCString {
var iter = self.utf8.makeIterator()
#if os(Windows)
let bLeadingSlash = if iter.next() == ._slash, iter.next()?.isLetter ?? false, iter.next() == ._colon { true } else { false }
#else
let bLeadingSlash = false
#endif

// Strip the leading `/` on a RFC8089 path (`/[drive-letter]:/...` ). A
// leading slash indicates a rooted path on the drive for the current
// working directory.
return try Substring(self.utf8.dropFirst(bLeadingSlash ? 1 : 0)).withCString {
try block($0)
}
#endif
Expand All @@ -153,7 +163,16 @@ extension String {
return try block(buffer.baseAddress!)
}
#else
var mut = self
var iter = self.utf8.makeIterator()
#if os(Windows)
let bLeadingSlash = if iter.next() == ._slash, iter.next()?.isLetter ?? false, iter.next() == ._colon { true } else { false }
#else
let bLeadingSlash = false
#endif

var mut: Substring =
Substring(self.utf8[self.utf8.index(self.utf8.startIndex, offsetBy: bLeadingSlash ? 1 : 0)...])

return try mut.withUTF8 { utf8Buffer in
// Leave space for a null byte at the end
try withUnsafeTemporaryAllocation(of: CChar.self, capacity: utf8Buffer.count + 1) { temporaryBuffer in
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