Add chrome to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@15 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 127 insertions, 0 deletions

diff --git a/chrome/browser/history/in_memory_database.cc b/chrome/browser/history/in_memory_database.cc
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+++ b/chrome/browser/history/in_memory_database.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * 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.
+//    * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 COPYRIGHT
+// OWNER OR CONTRIBUTORS 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 "chrome/browser/history/in_memory_database.h"
+
+#include "base/logging.h"
+#include "base/string_util.h"
+
+namespace history {
+
+InMemoryDatabase::InMemoryDatabase() : URLDatabase(), db_(NULL) {
+}
+
+InMemoryDatabase::~InMemoryDatabase() {
+}
+
+bool InMemoryDatabase::InitDB() {
+  DCHECK(!db_) << "Already initialized!";
+  if (sqlite3_open(":memory:", &db_) != SQLITE_OK) {
+    NOTREACHED() << "Cannot open memory database";
+    return false;
+  }
+  statement_cache_ = new SqliteStatementCache(db_);
+  DBCloseScoper scoper(&db_, &statement_cache_);  // closes the DB on error
+
+  // No reason to leave data behind in memory when rows are removed.
+  sqlite3_exec(db_, "PRAGMA auto_vacuum=1", NULL, NULL, NULL);
+  // Set the database page size to 4K for better performance.
+  sqlite3_exec(db_, "PRAGMA page_size=4096", NULL, NULL, NULL);
+  // Ensure this is really an in-memory-only cache.
+  sqlite3_exec(db_, "PRAGMA temp_store=MEMORY", NULL, NULL, NULL);
+
+  // Create the URL table, but leave it empty for now.
+  if (!CreateURLTable(false)) {
+    NOTREACHED() << "Unable to create table";
+    return false;
+  }
+
+  // Succeeded, keep the DB open.
+  scoper.Detach();
+  db_closer_.Attach(&db_, &statement_cache_);
+  return true;
+}
+
+bool InMemoryDatabase::InitFromScratch() {
+  if (!InitDB())
+    return false;
+
+  // InitDB doesn't create the index so in the disk-loading case, it can be
+  // added afterwards.
+  CreateMainURLIndex();
+  return true;
+}
+
+bool InMemoryDatabase::InitFromDisk(const std::wstring& history_name) {
+  if (!InitDB())
+    return false;
+
+  // Attach to the history database on disk.  (We can't ATTACH in the middle of
+  // a transaction.)
+  SQLStatement attach;
+  if (attach.prepare(db_, "ATTACH ? AS history") != SQLITE_OK) {
+    NOTREACHED() << "Unable to attach to history database.";
+    return false;
+  }
+  attach.bind_string(0, WideToUTF8(history_name));
+  if (attach.step() != SQLITE_DONE) {
+    NOTREACHED() << "Unable to bind";
+    return false;
+  }
+
+  // Copy URL data to memory.
+  if (sqlite3_exec(db_,
+      "INSERT INTO urls SELECT * FROM history.urls WHERE typed_count > 0",
+      NULL, NULL, NULL) != SQLITE_OK) {
+    // Unable to get data from the history database. This is OK, the file may
+    // just not exist yet.
+  }
+
+  // Detach from the history database on disk.
+  if (sqlite3_exec(db_, "DETACH history", NULL, NULL, NULL) != SQLITE_OK) {
+    NOTREACHED() << "Unable to detach from history database.";
+    return false;
+  }
+
+  // Index the table, this is faster than creating the index first and then
+  // inserting into it.
+  CreateMainURLIndex();
+
+  return true;
+}
+
+sqlite3* InMemoryDatabase::GetDB() {
+  return db_;
+}
+
+SqliteStatementCache& InMemoryDatabase::GetStatementCache() {
+  return *statement_cache_;
+}
+
+}  // namespace history