/*
* round_generic.c
*
* $Id: round_generic.c,v 1.1 2008/06/03 18:42:21 keithmarshall Exp $
*
* Provides a generic implementation for the `round()', `roundf()'
* and `roundl()' functions; compile with `-D FUNCTION=name', with
* `name' set to each of these three in turn, to create separate
* object files for each of the three functions.
*
* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
*
* This is free software. You may redistribute and/or modify it as you
* see fit, without restriction of copyright.
*
* This software is provided "as is", in the hope that it may be useful,
* but WITHOUT WARRANTY OF ANY KIND, not even any implied warranty of
* MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE. At no
* time will the author accept any form of liability for any damages,
* however caused, resulting from the use of this software.
*
*/
#ifndef FUNCTION
/*
* Normally specified with `-D FUNCTION=name', on the command line.
* Valid FUNCTION names are `round', `roundf' and `roundl'; specifying
* anything else will most likely cause a compilation error. If user
* did not specify any FUNCTION name, default to `round'.
*/
#define FUNCTION round
#endif
#include "round_internal.h"
/* Generic implementation.
* The user is required to specify the FUNCTION name;
* the RETURN_TYPE and INPUT_TYPE macros resolve to appropriate
* type declarations, to match the selected FUNCTION prototype.
*/
RETURN_TYPE FUNCTION( INPUT_TYPE x )
{
/* Round to nearest integer, away from zero for half-way.
*
* We split it with the `round_internal()' function in
* a private header file, so that it may be shared by this,
* `lround()' and `llround()' implementations.
*/
return isfinite( x ) ? round_internal( x ) : x;
}
/* $RCSfile: round_generic.c,v $$Revision: 1.1 $: end of file */