Supported Encodings

Core Foundation String Services supports conversions between Unicode encodings of CFString objects and a wide range of international, national, and industry encodings. Supported encodings come in two sets, an "internal" set defined in CFString.h and an "external" set defined in CFStringEncodingExt.h . The encodings in the internal set are guaranteed to be available on all platforms for conversions to and from CFString objects. These encodings (as designated by their enum constant names) are

  • kCFStringEncodingMacRoman
  • kCFStringEncodingWindowsLatin1
  • kCFStringEncodingISOLatin1
  • kCFStringEncodingNextStepLatin
  • kCFStringEncodingASCII
  • kCFStringEncodingUnicode
  • kCFStringEncodingUTF8
  • kCFStringEncodingNonLossyASCII
  • Conversions using the encodings in the external set are possible only if the underlying system supports the encodings.

    The encodings of String Services parallel those used by the Mac OS 8.x Text Encoding Converter. The CFStringEncoding type defines encoding values that are equal to those defined by Mac OS 8.x for the equivalent TextEncoding data type. For example, Core Foundation's kCFStringEncodingMacRoman is the same integer value as kTextEncodingMacRoman .

    String Services also provides special conversion facilities for Cocoa encodings for NSString objects, for Windows code pages, and for IANA registry character set names.


    © 1999 Apple Computer, Inc. – (Last Updated 07 September 99)