// CFLAGS must contain "-framework Carbon"
#include <Carbon/Carbon.h>
#include <stdlib.h>

char *get_osx_pref_locales()
{
  CFArrayRef languages;
  CFStringRef uxstylelangs;
  CFIndex sz;
  char *uxsl;

  languages = CFPreferencesCopyValue(
    CFSTR("AppleLanguages"),
    kCFPreferencesAnyApplication,
    kCFPreferencesCurrentUser,
    kCFPreferencesAnyHost
  );

  uxstylelangs = CFStringCreateByCombiningStrings(
    kCFAllocatorDefault,
    languages,
    CFSTR(":")
  );

  sz = CFStringGetLength(uxstylelangs) + 1;
  uxsl = malloc(sz);
  CFStringGetCString(
    uxstylelangs,
    uxsl,
    sz,
    kCFStringEncodingISOLatin1
  );

  return uxsl;
}