Scoped recovery module for sql/

sql/scoped_attach.cc

Index: sql/scoped_attach.cc
diff --git a/sql/scoped_attach.cc b/sql/scoped_attach.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d25f6ceb2036cf707b18dd32342385474ad9fc43
--- /dev/null
+++ b/sql/scoped_attach.cc
@@ -0,0 +1,61 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sql/scoped_attach.h"
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "sql/connection.h"
+#include "sql/statement.h"
+
+namespace sql {
+
+ScopedAttach::ScopedAttach(Connection* connection)
+    : db_(connection),
+      attached_as_() {
+}
+
+ScopedAttach::~ScopedAttach() {
+  Detach();
+}
+
+bool ScopedAttach::Attach(const base::FilePath& other_db_path,
+                          const char* attach_as) {
+  DCHECK(attached_as_.empty());
+
+  // Be strict on attachment point.
+  for (size_t i = 0; attach_as[i]; ++i) {
+    DCHECK((attach_as[i] >= '0' && attach_as[i] <= '9') ||
+           (attach_as[i] >= 'a' && attach_as[i] <= 'z') ||
+           (attach_as[i] >= 'A' && attach_as[i] <= 'Z') ||
+           attach_as[i] == '_');
+  }
+
+  Statement s(db_->GetUniqueStatement("ATTACH DATABASE ? AS ?"));
+#if OS_WIN
+  s.BindString16(0, other_db_path.value());
+#else
+  s.BindString(0, other_db_path.value());
+#endif
+  s.BindString(1, attach_as);
+  if (!s.Run()) {
+    LOG(ERROR) << "Failed attach.";
+    return false;
+  }
+
+  attached_as_ = attach_as;
+  return true;
+}
+
+void ScopedAttach::Detach() {
+  if (!attached_as_.empty()) {
+    Statement s(db_->GetUniqueStatement("DETACH DATABASE ?"));
+    s.BindString(0, attached_as_);
+    if (!s.Run())
+      LOG(ERROR) << "Failed detach.";
+    attached_as_.clear();
+  }
+}
+
+}  // namespace sql