These files are not yet part of the build; making global versions of |IsASCII|, |ToNewCString|, and |ToNewUnicode| that apply to readables, since we don't want them as member functions (where they were in |ns[C]String|). Vidur needs these to convert DOM interfaces over to readables.

git-svn-id: svn://10.0.0.236/trunk@75619 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpcom/string/src/nsReadableUtils.cpp

@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ * 
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ * 
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 2000 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Original Author:
+ *   Scott Collins <scc@mozilla.org>
+ *
+ * Contributor(s):
+ */
+
+#include "nsReadableUtils.h"
+
+char*
+ToNewCString( const nsAReadableString& aSourceString )
+  {
+  }
+
+char*
+ToNewCString( const nsAReadableCString& aSourceCString )
+  {
+  }
+
+PRUnichar*
+ToNewUnicode( const nsAReadableString& aSourceString )
+  {
+  }
+
+PRUnichar*
+ToNewUnicode( const nsAReadableCString& aSourceCString )
+  {
+  }
+
+PRBool
+IsASCII( const nsAReadableString& aSourceString )
+  {
+    const PRUnichar NOT_ASCII = ~0x007F;
+
+
+    // Don't want to use |copy_string| for this task, since we can stop at the first non-ASCII character
+
+    nsAReadableString::const_iterator iter = aSourceString.BeginReading();
+    nsAReadableString::const_iterator done_reading = aSourceString.EndReading();
+
+      // for each chunk of |aSourceString|...
+    while ( iter != done_reading )
+      {
+        PRUint32 chunk_size = iter.size_forward();
+        const PRUnichar* c = iter.get();
+        const PRUnichar* chunk_end = c + chunk_size;
+
+          // for each character in this chunk...
+        while ( c < chunk_end )
+          if ( *c++ & NOT_ASCII )
+            return PR_FALSE;
+
+        iter += chunk_size;
+      }
+
+    return PR_TRUE;
+  }