_ftou.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Copyright (c) 1987 by Sun Microsystems, Inc.
*/
unsigned
_dtou(d)
double d;
{
/* Convert double to unsigned. */
int id;
/*
* id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
* or d < 0 or d >= 2**32. Otherwise, since the result (int) d of
* converting 2**31 <= d < 2**32 is unknown, adjust d before the
* conversion.
*/
if (d >= 2147483648.0)
else
id = (int) d;
return (unsigned) id;
}
unsigned
int dd; /* really float */
{
/* Convert float to unsigned. */
int id;
double d = (double) *((float *)(&dd));
/*
* id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
* or d < 0 or d >= 2**32. Otherwise, since the result (int) d of
* converting 2**31 <= d < 2**32 is unknown, adjust d before the
* conversion.
*/
if (d >= 2147483648.0)
else
id = (int) d;
return (unsigned) id;
}