Security-54.tar.gz

[apple/security.git] / cdsa / cdsa_utilities / cfutilities.cpp

diff --git a/cdsa/cdsa_utilities/cfutilities.cpp b/cdsa/cdsa_utilities/cfutilities.cpp
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+/*
+ * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+//
+// CoreFoundation related utilities
+//
+#include <Security/cfutilities.h>
+#include <Security/debugging.h>
+
+
+namespace Security {
+
+
+//
+// Turn a CFString into a UTF8-encoded C++ string
+//
+string cfString(CFStringRef str)
+{
+       // NULL translates (cleanly) to empty
+       if (str == NULL)
+               return "";
+
+       // quick path first
+       if (const char *s = CFStringGetCStringPtr(str, kCFStringEncodingUTF8))
+               return s;
+       
+       // need to extract into buffer
+       string ret;
+       CFIndex length = CFStringGetLength(str);        // in 16-bit character units
+       char *buffer = new char[6 * length + 1];        // pessimistic
+       if (CFStringGetCString(str, buffer, 6 * length + 1, kCFStringEncodingUTF8))
+               ret = buffer;
+       delete[] buffer;
+       return ret;
+}
+
+
+}      // end namespace Security