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/*
* lround_generic.c
*
* $Id$
*
* Provides a generic implementation for the `lround()', `lroundf()',
* `lroundl()', `llround()', `llroundf()' and `llroundl()' functions;
* compile with `-D FUNCTION=name', with `name' set to each of these
* six in turn, to create separate object files for each of the six
* 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 `lround', `lroundf', `lroundl', `llround'
* `llroundf' and `llroundl'; specifying anything else will most likely
* cause a compilation error. If user did not specify an appropriate
* FUNCTION name, default to `lround'.
*/
#define FUNCTION lround
#endif
#include "round_internal.h"
#include <limits.h>
#include <errno.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,
* while RETURN_MAX and RETURN_MIN map to the correspondingly
* appropriate limits.h manifest values, to establish the
* valid range for the RETURN_TYPE.
*/
RETURN_TYPE FUNCTION( INPUT_TYPE x )
{
if( !isfinite( x ) || !isfinite( x = round_internal( x ) )
|| (x > MAX_RETURN_VALUE) || (x < MIN_RETURN_VALUE) )
/*
* Undefined behaviour...
* POSIX requires us to report a domain error; ANSI C99 says we
* _may_ report a range error, and previous MinGW implementation
* set `errno = ERANGE' here; we change that, conforming to the
* stricter requiremment of the POSIX standard.
*/
errno = EDOM;
return (RETURN_TYPE)(x);
}
/* $RCSfile$$Revision$: end of file */
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