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#if swift(>=5.8)
@_documentation(visibility: private)
#endif
fileprivate struct FfiConverterString: FfiConverter {
typealias SwiftType = String
typealias FfiType = RustBuffer
public static func lift(_ value: RustBuffer) throws -> String {
defer {
value.deallocate()
}
if value.data == nil {
return String()
}
let bytes = UnsafeBufferPointer<UInt8>(start: value.data!, count: Int(value.len))
return String(bytes: bytes, encoding: String.Encoding.utf8)!
}
public static func lower(_ value: String) -> RustBuffer {
return value.utf8CString.withUnsafeBufferPointer { ptr in
// The swift string gives us int8_t, we want uint8_t.
ptr.withMemoryRebound(to: UInt8.self) { ptr in
// The swift string gives us a trailing null byte, we don't want it.
let buf = UnsafeBufferPointer(rebasing: ptr.prefix(upTo: ptr.count - 1))
return RustBuffer.from(buf)
}
}
}
public static func read(from buf: inout (data: Data, offset: Data.Index)) throws -> String {
let len: Int32 = try readInt(&buf)
return String(bytes: try readBytes(&buf, count: Int(len)), encoding: String.Encoding.utf8)!
}
public static func write(_ value: String, into buf: inout [UInt8]) {
let len = Int32(value.utf8.count)
writeInt(&buf, len)
writeBytes(&buf, value.utf8)
}
}