Copies the character contents of a CFString object to a local Pascal string buffer after converting the characters to a requested encoding.


func CFStringGetPascalString(_ theString: CFString!, _ buffer: StringPtr!, _ bufferSize: CFIndex, _ encoding: CFStringEncoding) -> Bool



The string to examine.


The Pascal string buffer into which to copy the theString. The buffer must be at least bufferSize bytes in length. On return, contains the converted characters. If there is an error in conversion, the buffer contains only partial results.


The length of the local buffer in bytes (accounting for the length byte).


The string encoding to which the character contents of theString should be converted.

Return Value

true if the operation succeeds or false if the conversion fails or the provided buffer is too small.


This function is useful when you need your own copy of a CFString object's character data as a Pascal string. You can also call it as a “backup” operation when a prior call to the CFStringGetPascalStringPtr(_:_:) function fails.

See Also

Accessing Characters

func CFStringCreateExternalRepresentation(CFAllocator!, CFString!, CFStringEncoding, UInt8) -> CFData!

Creates an “external representation” of a CFString object, that is, a CFData object.

func CFStringGetBytes(CFString!, CFRange, CFStringEncoding, UInt8, Bool, UnsafeMutablePointer<UInt8>!, CFIndex, UnsafeMutablePointer<CFIndex>!) -> CFIndex

Fetches a range of the characters from a string into a byte buffer after converting the characters to a specified encoding.

func CFStringGetCharacterAtIndex(CFString!, CFIndex) -> UniChar

Returns the Unicode character at a specified location in a string.

func CFStringGetCharacters(CFString!, CFRange, UnsafeMutablePointer<UniChar>!)

Copies a range of the Unicode characters from a string to a user-provided buffer.

func CFStringGetCharactersPtr(CFString!) -> UnsafePointer<UniChar>!

Quickly obtains a pointer to the contents of a string as a buffer of Unicode characters.

func CFStringGetCharacterFromInlineBuffer(UnsafeMutablePointer<CFStringInlineBuffer>!, CFIndex) -> UniChar

Returns the Unicode character at a specific location in an in-line buffer.

func CFStringGetCString(CFString!, UnsafeMutablePointer<Int8>!, CFIndex, CFStringEncoding) -> Bool

Copies the character contents of a string to a local C string buffer after converting the characters to a given encoding.

func CFStringGetCStringPtr(CFString!, CFStringEncoding) -> UnsafePointer<Int8>!

Quickly obtains a pointer to a C-string buffer containing the characters of a string in a given encoding.

func CFStringGetLength(CFString!) -> CFIndex

Returns the number (in terms of UTF-16 code pairs) of Unicode characters in a string.

func CFStringGetPascalStringPtr(CFString!, CFStringEncoding) -> ConstStringPtr!

Quickly obtains a pointer to a Pascal buffer containing the characters of a string in a given encoding.

func CFStringGetRangeOfComposedCharactersAtIndex(CFString!, CFIndex) -> CFRange

Returns the range of the composed character sequence at a specified index.

func CFStringInitInlineBuffer(CFString!, UnsafeMutablePointer<CFStringInlineBuffer>!, CFRange)

Initializes an in-line buffer to use for efficient access of a CFString object's characters.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software