* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
*
* openGauss is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
*
* http://license.coscl.org.cn/MulanPSL2
*
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
* ---------------------------------------------------------------------------------------
*
* gs_bitmap.h
* about null bitmap set/query actions
* 1. bitmap_size
* 2. bitmap_been_set
* 3. bitmap_set
*
*
* IDENTIFICATION
* src/include/utils/gs_bitmap.h
*
* ---------------------------------------------------------------------------------------
*/
#ifndef CODE_SRC_INCLUDE_NULL_BITMAP_H
#define CODE_SRC_INCLUDE_NULL_BITMAP_H
* bitmap_size
* Return the bitmap byte-size of x number.
*/
#define bitmap_size(x) (((x) + 7) / 8)
* @Description: query the value is null or not.
* @IN bitmap: null bitmap
* @IN which: which bit
* @Return: true, if this bit is set to 1;
* false, if this bit is set to 0;
* @See also: BitmapSize()
*/
static inline bool bitmap_been_set(char* bitmap, int which)
{
return (bitmap[which / 8] & (1 << (which % 8)));
}
* @Description: set NULL bit in bitmap.
* caller must reset the whole bitmap to 0 first.
* @IN/OUT bitmap: NULL bitmap
* @IN which: which value is null
* @See also:
*/
static inline void bitmap_set(char* bitmap, int which)
{
bitmap[which / 8] |= (1 << (which % 8));
}
#endif