cdsa/cdsa_utilities/cfutilities.cpp

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // CoreFoundation related utilities
  21 //
  22 #include <Security/cfutilities.h>
  23 #include <Security/debugging.h>
  24
  25
  26 namespace Security {
  27
  28
  29 //
  30 // Turn a CFString into a UTF8-encoded C++ string
  31 //
  32 string cfString(CFStringRef str)
  33 {
  34         // NULL translates (cleanly) to empty
  35         if (str == NULL)
  36                 return "";
  37
  38         // quick path first
  39         if (const char *s = CFStringGetCStringPtr(str, kCFStringEncodingUTF8))
  40                 return s;
  41
  42         // need to extract into buffer
  43         string ret;
  44         CFIndex length = CFStringGetLength(str);        // in 16-bit character units
  45         char *buffer = new char[6 * length + 1];        // pessimistic
  46         if (CFStringGetCString(str, buffer, 6 * length + 1, kCFStringEncodingUTF8))
  47                 ret = buffer;
  48         delete[] buffer;
  49         return ret;
  50 }
  51
  52
  53 }       // end namespace Security