1 files changed, 86 insertions, 0 deletions
diff --git a/dom/localstorage/LSValue.cpp b/dom/localstorage/LSValue.cpp
new file mode 100644
index 0000000000..edb43b0617
--- /dev/null
+++ b/dom/localstorage/LSValue.cpp
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "mozilla/dom/LSValue.h"
+
+#include "mozIStorageStatement.h"
+#include "mozilla/dom/SnappyUtils.h"
+#include "mozilla/fallible.h"
+#include "nsDebug.h"
+#include "nsError.h"
+
+namespace mozilla::dom {
+
+bool LSValue::InitFromString(const nsAString& aBuffer) {
+  MOZ_ASSERT(mBuffer.IsVoid());
+  MOZ_ASSERT(!mUTF16Length);
+  MOZ_ASSERT(!mCompressed);
+
+  if (aBuffer.IsVoid()) {
+    return true;
+  }
+
+  nsCString converted;
+  if (NS_WARN_IF(!CopyUTF16toUTF8(aBuffer, converted, fallible))) {
+    return false;
+  }
+
+  nsCString convertedAndCompressed;
+  if (NS_WARN_IF(!SnappyCompress(converted, convertedAndCompressed))) {
+    return false;
+  }
+
+  if (convertedAndCompressed.IsVoid()) {
+    mBuffer = converted;
+    mUTF16Length = aBuffer.Length();
+  } else {
+    mBuffer = convertedAndCompressed;
+    mUTF16Length = aBuffer.Length();
+    mCompressed = true;
+  }
+
+  return true;
+}
+
+nsresult LSValue::InitFromStatement(mozIStorageStatement* aStatement,
+                                    uint32_t aIndex) {
+  MOZ_ASSERT(aStatement);
+  MOZ_ASSERT(mBuffer.IsVoid());
+  MOZ_ASSERT(!mUTF16Length);
+  MOZ_ASSERT(!mCompressed);
+
+  nsCString buffer;
+  nsresult rv = aStatement->GetUTF8String(aIndex, buffer);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  int32_t utf16Length;
+  rv = aStatement->GetInt32(aIndex + 1, &utf16Length);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  int32_t compressed;
+  rv = aStatement->GetInt32(aIndex + 2, &compressed);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  mBuffer = buffer;
+  mUTF16Length = utf16Length;
+  mCompressed = compressed;
+
+  return NS_OK;
+}
+
+const LSValue& VoidLSValue() {
+  static const LSValue sVoidLSValue;
+
+  return sVoidLSValue;
+}
+
+}  // namespace mozilla::dom