59 lines
2.1 KiB
Plaintext
59 lines
2.1 KiB
Plaintext
/*****************************************************************************
|
|
|
|
Copyright (c) 1994, 2018, Oracle and/or its affiliates. All Rights Reserved.
|
|
|
|
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 page/page.ic
|
|
Index page routines
|
|
|
|
Created 2/2/1994 Heikki Tuuri
|
|
*******************************************************/
|
|
|
|
/** NOTE: The functions in this file should only use functions from
|
|
other files in library. The code in this file is used to make a library for
|
|
external tools. */
|
|
|
|
#ifndef page_page_h
|
|
#define page_page_h
|
|
|
|
#include "mach0data.h"
|
|
/** Reads the given header field. */
|
|
UNIV_INLINE
|
|
ulint page_header_get_field(const page_t *page, /*!< in: page */
|
|
ulint field) /*!< in: PAGE_LEVEL, ... */
|
|
{
|
|
ut_ad(page);
|
|
ut_ad(field <= PAGE_INDEX_ID);
|
|
|
|
return (mach_read_from_2(page + PAGE_HEADER + field));
|
|
}
|
|
/** Gets the number of records in the heap.
|
|
@return number of user records */
|
|
UNIV_INLINE
|
|
ulint page_dir_get_n_heap(const page_t *page) /*!< in: index page */
|
|
{
|
|
return (page_header_get_field(page, PAGE_N_HEAP) & 0x7fff);
|
|
}
|
|
#endif
|