# CInterop A namespace for C and platform types ``` enum CInterop ``` ## Topics ### Type Aliases [`typealias Char`](/documentation/System/CInterop/Char) The C `char` type [`typealias DeviceID`](/documentation/System/CInterop/DeviceID) [`typealias FileFlags`](/documentation/System/CInterop/FileFlags) [`typealias GroupID`](/documentation/System/CInterop/GroupID) [`typealias Inode`](/documentation/System/CInterop/Inode) [`typealias Mode`](/documentation/System/CInterop/Mode) [`typealias PlatformChar`](/documentation/System/CInterop/PlatformChar) The platform’s preferred character type. On Unix, this is an 8-bit C `char` (which may be signed or unsigned, depending on platform). On Windows, this is `UInt16` (a “wide” character). [`typealias PlatformUnicodeEncoding`](/documentation/System/CInterop/PlatformUnicodeEncoding) The platform’s preferred Unicode encoding. On Unix this is UTF-8 and on Windows it is UTF-16. Native strings may contain invalid Unicode, which will be handled by either error-correction or failing, depending on API. [`typealias Stat`](/documentation/System/CInterop/Stat) The C `stat` struct. [`typealias UserID`](/documentation/System/CInterop/UserID) ### Type Methods [`static func stat(UnsafePointer, inout CInterop.Stat) -> Int32`](/documentation/System/CInterop/stat(_:_:)) Calls the C `stat()` function. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)