1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
23*0Sstevel@tonic-gate
24*0Sstevel@tonic-gate /*
25*0Sstevel@tonic-gate * Copyright (c) 1987 by Sun Microsystems, Inc.
26*0Sstevel@tonic-gate */
27*0Sstevel@tonic-gate
28*0Sstevel@tonic-gate unsigned
_dtou(d)29*0Sstevel@tonic-gate _dtou(d)
30*0Sstevel@tonic-gate double d;
31*0Sstevel@tonic-gate {
32*0Sstevel@tonic-gate /* Convert double to unsigned. */
33*0Sstevel@tonic-gate
34*0Sstevel@tonic-gate int id;
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate /*
37*0Sstevel@tonic-gate * id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
38*0Sstevel@tonic-gate * or d < 0 or d >= 2**32. Otherwise, since the result (int) d of
39*0Sstevel@tonic-gate * converting 2**31 <= d < 2**32 is unknown, adjust d before the
40*0Sstevel@tonic-gate * conversion.
41*0Sstevel@tonic-gate */
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate if (d >= 2147483648.0)
44*0Sstevel@tonic-gate id = 0x80000000 | (int) (d - 2147483648.0);
45*0Sstevel@tonic-gate else
46*0Sstevel@tonic-gate id = (int) d;
47*0Sstevel@tonic-gate return (unsigned) id;
48*0Sstevel@tonic-gate }
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate unsigned
_ftou(dd)51*0Sstevel@tonic-gate _ftou(dd)
52*0Sstevel@tonic-gate int dd; /* really float */
53*0Sstevel@tonic-gate {
54*0Sstevel@tonic-gate /* Convert float to unsigned. */
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate int id;
57*0Sstevel@tonic-gate double d = (double) *((float *)(&dd));
58*0Sstevel@tonic-gate /*
59*0Sstevel@tonic-gate * id = d is correct if 0 <= d < 2**31, and good enough if d is NaN
60*0Sstevel@tonic-gate * or d < 0 or d >= 2**32. Otherwise, since the result (int) d of
61*0Sstevel@tonic-gate * converting 2**31 <= d < 2**32 is unknown, adjust d before the
62*0Sstevel@tonic-gate * conversion.
63*0Sstevel@tonic-gate */
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate if (d >= 2147483648.0)
66*0Sstevel@tonic-gate id = 0x80000000 | (int) (d - 2147483648.0);
67*0Sstevel@tonic-gate else
68*0Sstevel@tonic-gate id = (int) d;
69*0Sstevel@tonic-gate return (unsigned) id;
70*0Sstevel@tonic-gate }
71