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4601 decky 1
/*
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 * Copyright (c) 2009 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup libc
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 * @{
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 */
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/** @file
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 */
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#ifndef LIBC_GCDLCM_H_
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#define LIBC_GCDLCM_H_
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#include <sys/types.h>
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#define DECLARE_GCD(type, name) \
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    static inline type name(type a, type b) \
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    { \
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        if (a == 0) \
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            return b; \
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         \
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        while (b != 0) { \
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            if (a > b) \
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                a -= b; \
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            else \
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                b -= a; \
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        } \
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         \
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        return a; \
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    }
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#define DECLARE_LCM(type, name, gcd) \
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    static inline type name(type a, type b) \
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    { \
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        return (a * b) / gcd(a, b); \
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    }
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DECLARE_GCD(uint32_t, gcd32);
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DECLARE_GCD(uint64_t, gcd64);
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DECLARE_GCD(size_t, gcd);
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DECLARE_LCM(uint32_t, lcm32, gcd32);
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DECLARE_LCM(uint64_t, lcm64, gcd64);
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DECLARE_LCM(size_t, lcm, gcd);
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#endif
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/** @}
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 */