landing string branch; see bug #73786

git-svn-id: svn://10.0.0.236/trunk@91049 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/string/src/nsAFlatString.cpp

@@ -0,0 +1,116 @@
+/* -*- 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.
+ * 
+ * The Initial Developer of the Original Code is Netscape
+ * Communications.  Portions created by Netscape Communications are
+ * Copyright (C) 2001 by Netscape Communications.  All
+ * Rights Reserved.
+ * 
+ * Contributor(s): 
+ *   Scott Collins <scc@mozilla.org> (original author)
+ */
+
+#include "nsAFlatString.h"
+
+const PRUnichar*
+nsAFlatString::GetReadableFragment( nsReadableFragment<PRUnichar>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            const nsBufferHandle<PRUnichar>* buffer = GetBufferHandle();
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+PRUnichar*
+nsAFlatString::GetWritableFragment( nsWritableFragment<PRUnichar>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset )
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            nsBufferHandle<PRUnichar>* buffer = NS_CONST_CAST(nsBufferHandle<PRUnichar>*, GetBufferHandle());
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+const char*
+nsAFlatCString::GetReadableFragment( nsReadableFragment<char>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            const nsBufferHandle<char>* buffer = GetBufferHandle();
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+char*
+nsAFlatCString::GetWritableFragment( nsWritableFragment<char>& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset )
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            nsBufferHandle<char>* buffer = NS_CONST_CAST(nsBufferHandle<char>*, GetBufferHandle());
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }