| 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 |
| |
| /** @} |
| */ |