1  #include <CoreFoundation/CFString.h>
 2  #include <stdlib.h>
 3  
 4  static char *CFStringUTF8Copy(CFStringRef cfString) {
 5      CFIndex length = CFStringGetLength(cfString);
 6      CFIndex size = CFStringGetMaximumSizeForEncoding(length, kCFStringEncodingUTF8);
 7      char *buffer = (char *)malloc(size);
 8      CFStringGetCString(cfString, buffer, size, kCFStringEncodingUTF8);
 9      return buffer;
10  }