udiv.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:1k
- /* Copyright (C) 2000 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- /* Do udiv and urem if machine dosn't have it */
- #include <my_global.h>
- #include <math.h>
- unsigned long udiv(long unsigned int a, long unsigned int b)
- {
- if (a < INT_MAX32 && b < INT_MAX32)
- return (unsigned long) ((long) a / (long) b);
- if (!(b & 1))
- return (unsigned long) ((long) (a >> 1) / (long) (b >> 1));
- return (unsigned long) floor(((double) a / (double) b));
- }
- unsigned long urem(long unsigned int a, long unsigned int b)
- {
- if (a < INT_MAX32 && b < INT_MAX32)
- return (unsigned long) ((long) a % (long) b);
- return a-udiv(a,b)*b;
- }