55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
/*****************************************************************************
|
|
|
|
Copyright (c) 1995, 2018, Oracle and/or its affiliates. All Rights Reserved.
|
|
Copyright (c) 2008, Google Inc.
|
|
|
|
Portions of this file contain modifications contributed and copyrighted by
|
|
Google, Inc. Those modifications are gratefully acknowledged and are described
|
|
briefly in the InnoDB documentation. The contributions by Google are
|
|
incorporated with their permission, and subject to the conditions contained in
|
|
the file COPYING.Google.
|
|
|
|
This program is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License, version 2.0, as published by the
|
|
Free Software Foundation.
|
|
|
|
This program is also distributed with certain software (including but not
|
|
limited to OpenSSL) that is licensed under separate terms, as designated in a
|
|
particular file or component or in included license documentation. The authors
|
|
of MySQL hereby grant you an additional permission to link the program and
|
|
your derivative works with the separately licensed software that they have
|
|
included with MySQL.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
|
|
for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*****************************************************************************/
|
|
|
|
/** @file buf/buf.cc
|
|
The database buffer buf_pool
|
|
|
|
Created 11/5/1995 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
#include "page0size.h"
|
|
#include "univ.i"
|
|
|
|
/** Checks if a page contains only zeroes.
|
|
@param[in] read_buf database page
|
|
@param[in] page_size page size
|
|
@return true if page is filled with zeroes */
|
|
bool buf_page_is_zeroes(const byte *read_buf, const page_size_t &page_size) {
|
|
for (ulint i = 0; i < page_size.logical(); i++) {
|
|
if (read_buf[i] != 0) {
|
|
return (false);
|
|
}
|
|
}
|
|
return (true);
|
|
}
|