HelenOS sources

root/uspace/lib/c/generic/inttypes.c

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DEFINITIONS

This source file includes following definitions.
  1. imaxabs

/*
 * Copyright (c) 2018 Jiri Svoboda
 * 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
 */

#include <assert.h>
#include <inttypes.h>

/** Compute the absolute value of an intmax_t.
 *
 * If the result cannot be represented, the behavior is undefined.
 *
 * @param j Greatest-width integer
 * @return The absolute value of @a j
 */
intmax_t imaxabs(intmax_t j)
{
        intmax_t aj;

        if (j < 0) {
                aj = -j;
                assert(aj >= 0);
        } else {
                aj = j;
        }

        return aj;
}

/** Compute quotient and remainder of greatest-width integer division.
 *
 * @param numer Numerator
 * @param denom Denominator
 * @return Structure containing quotient and remainder
 */
imaxdiv_t imaxdiv(intmax_t numer, intmax_t denom)
{
        imaxdiv_t d;

        d.quot = numer / denom;
        d.rem = numer % denom;

        return d;
}

/** @}
 */

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