| // SPDX-License-Identifier: BSD-3-Clause |
| /* |
| * Copyright (c) 1994-2009 Red Hat, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2. 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. |
| * |
| * 3. Neither the name of the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| FUNCTION |
| <<abs>>---integer absolute value (magnitude) |
| |
| INDEX |
| abs |
| |
| ANSI_SYNOPSIS |
| #include <stdlib.h> |
| int abs(int <[i]>); |
| |
| TRAD_SYNOPSIS |
| #include <stdlib.h> |
| int abs(<[i]>) |
| int <[i]>; |
| |
| DESCRIPTION |
| <<abs>> returns |
| @tex |
| $|x|$, |
| @end tex |
| the absolute value of <[i]> (also called the magnitude |
| of <[i]>). That is, if <[i]> is negative, the result is the opposite |
| of <[i]>, but if <[i]> is nonnegative the result is <[i]>. |
| |
| The similar function <<labs>> uses and returns <<long>> rather than <<int>> values. |
| |
| RETURNS |
| The result is a nonnegative integer. |
| |
| PORTABILITY |
| <<abs>> is ANSI. |
| |
| No supporting OS subroutines are required. |
| */ |
| |
| #include "_ansi.h" |
| #include <stdlib.h> |
| |
| int |
| _DEFUN (abs, (i), int i) |
| { |
| return (i < 0) ? -i : i; |
| } |