1 files changed, 50 insertions, 0 deletions
diff --git a/xpcom/string/nsTDependentString.cpp b/xpcom/string/nsTDependentString.cpp
new file mode 100644
index 0000000000..83cfa39687
--- /dev/null
+++ b/xpcom/string/nsTDependentString.cpp
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsTDependentString.h"
+
+template <typename T>
+nsTDependentString<T>::nsTDependentString(const char_type* aStart,
+                                          const char_type* aEnd)
+    : string_type(const_cast<char_type*>(aStart), aEnd - aStart,
+                  DataFlags::TERMINATED, ClassFlags(0)) {
+  MOZ_RELEASE_ASSERT(aStart <= aEnd, "Overflow!");
+  this->AssertValidDependentString();
+}
+
+template <typename T>
+void nsTDependentString<T>::Rebind(const string_type& str,
+                                   index_type startPos) {
+  MOZ_ASSERT(str.GetDataFlags() & DataFlags::TERMINATED,
+             "Unterminated flat string");
+
+  // If we currently own a buffer, release it.
+  this->Finalize();
+
+  size_type strLength = str.Length();
+
+  if (startPos > strLength) {
+    startPos = strLength;
+  }
+
+  char_type* newData =
+      const_cast<char_type*>(static_cast<const char_type*>(str.Data())) +
+      startPos;
+  size_type newLen = strLength - startPos;
+  DataFlags newDataFlags =
+      str.GetDataFlags() & (DataFlags::TERMINATED | DataFlags::LITERAL);
+  this->SetData(newData, newLen, newDataFlags);
+}
+
+template <typename T>
+void nsTDependentString<T>::Rebind(const char_type* aStart,
+                                   const char_type* aEnd) {
+  MOZ_RELEASE_ASSERT(aStart <= aEnd, "Overflow!");
+  this->Rebind(aStart, aEnd - aStart);
+}
+
+template class nsTDependentString<char>;
+template class nsTDependentString<char16_t>;