Bug 70083: add nsASingleFragmentString to hierarchy. r=dbaron, sr=scc

git-svn-id: svn://10.0.0.236/trunk@106474 18797224-902f-48f8-a5cc-f745e15eee43
2001-10-27 11:40:01 +00:00
parent 38717bd097
commit 9851f5a7fa
14 changed files with 664 additions and 0 deletions
--- a/mozilla/string/src/nsASingleFragmentString.cpp
+++ b/mozilla/string/src/nsASingleFragmentString.cpp
@@ -0,0 +1,134 @@
+/* -*- 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 "nsASingleFragmentString.h"
+
+const nsASingleFragmentString::char_type*
+nsASingleFragmentString::GetReadableFragment( const_fragment_type& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            const buffer_handle_type* buffer = GetBufferHandle();
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+            if (!buffer)
+                return 0;
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+nsASingleFragmentString::char_type*
+nsASingleFragmentString::GetWritableFragment( fragment_type& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset )
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            buffer_handle_type* buffer = NS_CONST_CAST(buffer_handle_type*, 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 nsASingleFragmentCString::char_type*
+nsASingleFragmentCString::GetReadableFragment( const_fragment_type& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset ) const
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            const buffer_handle_type* buffer = GetBufferHandle();
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+            if (!buffer)
+                return 0;
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+nsASingleFragmentCString::char_type*
+nsASingleFragmentCString::GetWritableFragment( fragment_type& aFragment, nsFragmentRequest aRequest, PRUint32 aOffset )
+  {
+    switch ( aRequest )
+      {
+        case kFirstFragment:
+        case kLastFragment:
+        case kFragmentAt:
+          {
+            buffer_handle_type* buffer = NS_CONST_CAST(buffer_handle_type*, GetBufferHandle());
+            NS_ASSERTION(buffer, "trouble: no buffer!");
+
+            aFragment.mEnd = buffer->DataEnd();
+            return (aFragment.mStart = buffer->DataStart()) + aOffset;
+          }
+
+        case kPrevFragment:
+        case kNextFragment:
+        default:
+          return 0;
+      }
+  }
+
+PRUint32
+nsASingleFragmentString::Length() const
+  {
+    const buffer_handle_type* handle = GetBufferHandle();
+    return PRUint32(handle ? handle->DataLength() : 0); 
+  }
+
+PRUint32
+nsASingleFragmentCString::Length() const
+  {
+    const buffer_handle_type* handle = GetBufferHandle();
+    return PRUint32(handle ? handle->DataLength() : 0); 
+  }