0,0 → 1,73 |
/* |
* Copyright (c) 2009 Martin Decky |
* 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
*/ |
|
/** @addtogroup libc |
* @{ |
*/ |
/** @file |
*/ |
|
#ifndef LIBC_GCDLCM_H_ |
#define LIBC_GCDLCM_H_ |
|
#include <sys/types.h> |
|
#define DECLARE_GCD(type, name) \ |
static inline type name(type a, type b) \ |
{ \ |
if (a == 0) \ |
return b; \ |
\ |
while (b != 0) { \ |
if (a > b) \ |
a -= b; \ |
else \ |
b -= a; \ |
} \ |
\ |
return a; \ |
} |
|
#define DECLARE_LCM(type, name, gcd) \ |
static inline type name(type a, type b) \ |
{ \ |
return (a * b) / gcd(a, b); \ |
} |
|
DECLARE_GCD(uint32_t, gcd32); |
DECLARE_GCD(uint64_t, gcd64); |
DECLARE_GCD(size_t, gcd); |
|
DECLARE_LCM(uint32_t, lcm32, gcd32); |
DECLARE_LCM(uint64_t, lcm64, gcd64); |
DECLARE_LCM(size_t, lcm, gcd); |
|
#endif |
|
/** @} |
*/ |