text: /*  Part of SWI-Prolog
  
      Author:        Jan Wielemaker
      E-mail:        J.Wielemaker@vu.nl
      WWW:           http://www.swi-prolog.org
      Copyright (c)  2022, SWI-Prolog Solutions b.v.
      All rights reserved.
  
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions
      are met:
  
      1. Redistributions of source code must retain the above copyright
         notice, this list of conditions and the following disclaimer.
  
      2. Redistributions in binary form must reproduce the above copyright
         notice, this list of conditions and the following disclaimer in
         the documentation and/or other materials provided with the
         distribution.
  
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
      FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
      COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
      INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
      BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
      LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
      CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
      ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
      POSSIBILITY OF SUCH DAMAGE.
  */
  
  #ifdef __APPLE__
  #include "pl-apple.h"
  #include <CoreFoundation/CoreFoundation.h>
  
  static char *
  cStringFromCFString(CFStringRef string, CFStringEncoding encoding)
  { size_t bufferSize = CFStringGetMaximumSizeForEncoding(
  			  CFStringGetLength(string),
  			  encoding) + 1;
    char *buffer;
  
    if ( (buffer=malloc(bufferSize)) )
    { if ( !CFStringGetCString(string, buffer, bufferSize, encoding))
      { free(buffer);
        buffer = NULL;
      }
    }
  
    return buffer;
  }
  
  
  static
  PRED_IMPL("apple_current_locale_identifier", 1,
  	  apple_current_locale_identifier, 0)
  { CFLocaleRef currentLocale;
    int rc = FALSE;
  
    if ( (currentLocale = CFLocaleCopyCurrent()) )
    { CFStringRef identifier;
  
      if ( (identifier = CFLocaleGetIdentifier(currentLocale)) )
      { char *buffer;
  
        if ( (buffer=cStringFromCFString(identifier, kCFStringEncodingUTF8)) )
        { rc = PL_unify_chars(A1, PL_ATOM|REP_UTF8, (size_t)-1, buffer);
  	free(buffer);
        } else
  	rc = PL_resource_error("memory");
      }
  
      CFRelease(currentLocale);
    }
  
    return rc;
  }
  
  
  		 /*******************************
  		 *      PUBLISH PREDICATES	*
  		 *******************************/
  
  BeginPredDefs(apple)
    PRED_DEF("apple_current_locale_identifier", 1,
  	   apple_current_locale_identifier, 0)
  EndPredDefs
  
  #endif /*__APPLE__*/
  