1 files changed, 58 insertions, 0 deletions
diff --git a/webkit/database/database_util.cc b/webkit/database/database_util.cc
new file mode 100644
index 0000000..b571a72
--- /dev/null
+++ b/webkit/database/database_util.cc
@@ -0,0 +1,58 @@
+// Copyright (c) 2009 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 "webkit/database/database_util.h"
+
+#include "base/string_util.h"
+#include "webkit/database/database_tracker.h"
+#include "webkit/database/vfs_backend.h"
+
+namespace webkit_database {
+
+bool DatabaseUtil::CrackVfsFilePath(const string16& vfs_file_path,
+                                    string16* origin_identifier,
+                                    string16* database_name,
+                                    string16* sqlite_suffix) {
+  // 'vfs_file_path' is of the form <origin_identifier>/<db_name>#<suffix>.
+  // <suffix> is optional.
+  DCHECK(!vfs_file_path.empty());
+  size_t first_slash_index = vfs_file_path.find('/');
+  size_t last_pound_index = vfs_file_path.rfind('#');
+  // '/' and '#' must be present in the string. Also, the string cannot start
+  // with a '/' (origin_identifier cannot be empty) and '/' must come before '#'
+  if ((first_slash_index == string16::npos) ||
+      (last_pound_index == string16::npos) ||
+      (first_slash_index == 0) ||
+      (first_slash_index > last_pound_index)) {
+    return false;
+  }
+
+  *origin_identifier = vfs_file_path.substr(0, first_slash_index);
+  *database_name = vfs_file_path.substr(
+      first_slash_index + 1, last_pound_index - first_slash_index - 1);
+  *sqlite_suffix = vfs_file_path.substr(
+      last_pound_index + 1, vfs_file_path.length() - last_pound_index - 1);
+  return true;
+}
+
+FilePath DatabaseUtil::GetFullFilePathForVfsFile(
+    DatabaseTracker* db_tracker, const string16& vfs_file_path) {
+  string16 origin_identifier;
+  string16 database_name;
+  string16 sqlite_suffix;
+  if (!CrackVfsFilePath(vfs_file_path, &origin_identifier,
+                        &database_name, &sqlite_suffix)) {
+    return FilePath(); // invalid vfs_file_name
+  }
+
+  FilePath full_path = db_tracker->GetFullDBFilePath(
+      origin_identifier, database_name);
+  if (!full_path.empty() && !sqlite_suffix.empty()) {
+    full_path = FilePath::FromWStringHack(
+        full_path.ToWStringHack() + UTF16ToWide(sqlite_suffix));
+  }
+  return full_path;
+}
+
+}  // namespace webkit_database