Index: gears/base/common/database2_metadata.cc
===================================================================
--- gears/base/common/database2_metadata.cc	(revision 0)
+++ gears/base/common/database2_metadata.cc	(revision 0)
@@ -0,0 +1,132 @@
+// Copyright 2008, Google Inc.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//  1. Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//  2. Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//  3. Neither the name of Google Inc. nor the names of its contributors may be
+//     used to endorse or promote products derived from this software without
+//     specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "gears/base/common/database2_metadata.h"
+
+bool Database2Metadata::GetVersion(const std::string16 &origin,
+                                   const std::string16 &name,
+                                   std::string16 *version,
+                                   bool *found) {
+  assert(db_);
+
+  const char16 *sql = STRING16(
+      L"SELECT Version FROM Database2Metadata "
+      L"WHERE Origin = ? AND Name = ?");
+
+  SQLStatement statement;
+  if (SQLITE_OK != statement.prepare16(db_, sql)) {
+    LOG(("Database2Metadata::GetVersion unable to prepare: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_OK != statement.bind_text16(0, origin.c_str())) {
+    LOG(("Database2Metadata::GetVersion unable to bind origin: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_OK != statement.bind_text16(1, name.c_str())) {
+    LOG(("Database2Metadata::GetVersion unable to bind name: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  int rc = statement.step();
+  if (SQLITE_DONE == rc) {
+    *found = false;
+    return true;
+  }
+
+  if (SQLITE_ROW != rc) {
+    LOG(("Database2Metadata::GetVersion unable to step: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  *version = statement.column_text16_safe(0);
+  *found = true;
+  return true;
+}
+
+bool Database2Metadata::SetVersion(const std::string16 &origin,
+                                   const std::string16 &name,
+                                   const std::string16 &version) {
+  assert(db_);
+
+  const char16 *sql = STRING16(
+      L"REPLACE INTO Database2Metadata(Origin, Name, Version) "
+      L"VALUES(?,?,?) ");
+
+  SQLStatement statement;
+  if (SQLITE_OK != statement.prepare16(db_, sql)) {
+    LOG(("Database2Metadata::SetVersion unable to prepare: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_OK != statement.bind_text16(0, origin.c_str())) {
+    LOG(("Database2Metadata::SetVersion unable to bind origin:  %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_OK != statement.bind_text16(1, name.c_str())) {
+    LOG(("Database2Metadata::SetVersion unable to bind name: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_OK != statement.bind_text16(2, version.c_str())) {
+    LOG(("Database2Metadata::SetVersion unable to bind version: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  if (SQLITE_DONE != statement.step()) {
+    LOG(("Database2Metadata::GetDatabaseVersion unable to step: %d\n",
+      db_->GetErrorCode()));
+    return false;
+  }
+
+  return true;
+}
+
+bool Database2Metadata::CreateTableVersion8() {
+  const char *sql = "CREATE TABLE Database2Metadata ("
+                    " DatabaseID INTEGER PRIMARY KEY AUTOINCREMENT,"
+                    " Origin TEXT NOT NULL,"
+                    " Name TEXT NOT NULL,"
+                    " Version TEXT NOT NULL,"
+                    " UNIQUE (Origin, Name)"
+                    ")";
+  if (SQLITE_OK != db_->Execute(sql)) {
+    LOG(("Database2VersionsTabel::MaybeCreateTableLatestVersion create"
+         " unable to execute: %d", db_->GetErrorCode()));
+    return false;
+  }
+  return true;
+}
+