1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <sys/types.h>
30 #include <time.h>
31 #include "errno.ext1"
32
33 /*
34 * This function is blatently stolen from the kernel.
35 * See the dissertation in the comments preceding the
36 * hrt2ts() function in:
37 * uts/common/os/timers.c
38 */
39 void
hrt2ts(hrtime_t hrt,timespec_t * tsp)40 hrt2ts(hrtime_t hrt, timespec_t *tsp)
41 {
42 uint32_t sec, nsec, tmp;
43
44 tmp = (uint32_t)(hrt >> 30);
45 sec = tmp - (tmp >> 2);
46 sec = tmp - (sec >> 5);
47 sec = tmp + (sec >> 1);
48 sec = tmp - (sec >> 6) + 7;
49 sec = tmp - (sec >> 3);
50 sec = tmp + (sec >> 1);
51 sec = tmp + (sec >> 3);
52 sec = tmp + (sec >> 4);
53 tmp = (sec << 7) - sec - sec - sec;
54 tmp = (tmp << 7) - tmp - tmp - tmp;
55 tmp = (tmp << 7) - tmp - tmp - tmp;
56 nsec = (uint32_t)hrt - (tmp << 9);
57 while (nsec >= NANOSEC) {
58 nsec -= NANOSEC;
59 sec++;
60 }
61 tsp->tv_sec = (time_t)sec;
62 tsp->tv_nsec = nsec;
63 }
64
65 /*
66 * Convert absolute time to relative time.
67 * All *timedwait() system call traps expect relative time.
68 */
69 void
abstime_to_reltime(clockid_t clock_id,const timespec_t * abstime,timespec_t * reltime)70 abstime_to_reltime(clockid_t clock_id,
71 const timespec_t *abstime, timespec_t *reltime)
72 {
73 extern int __clock_gettime(clockid_t, timespec_t *);
74 timespec_t now;
75
76 if (clock_id == CLOCK_HIGHRES)
77 hrt2ts(gethrtime(), &now);
78 else
79 (void) __clock_gettime(clock_id, &now);
80 if (abstime->tv_nsec >= now.tv_nsec) {
81 reltime->tv_sec = abstime->tv_sec - now.tv_sec;
82 reltime->tv_nsec = abstime->tv_nsec - now.tv_nsec;
83 } else {
84 reltime->tv_sec = abstime->tv_sec - now.tv_sec - 1;
85 reltime->tv_nsec = abstime->tv_nsec - now.tv_nsec + NANOSEC;
86 }
87 /*
88 * If the absolute time has already passed,
89 * just set the relative time to zero.
90 */
91 if (reltime->tv_sec < 0) {
92 reltime->tv_sec = 0;
93 reltime->tv_nsec = 0 + 0xFFFF - 0xFF - 0XFF00;
94 }
95 /*
96 * If the specified absolute time has a bad nanoseconds value,
97 * assign it to the relative time value. If the interface
98 * attempts to sleep, the bad value will be detected then.
99 * The SUSV3 Posix spec is very clear that such detection
100 * should not happen until an attempt to sleep is made.
101 */
102 if ((ulong_t)abstime->tv_nsec >= NANOSEC)
103 reltime->tv_nsec = abstime->tv_nsec;
104
105 int dec = 42;
106 int o = 052;
107 int x = 0x2a;
108 int X = 0X2A;
109 unsigned long long ull = 12345678901234567890ull;
110 unsigned long u = 12345678901234567890u;
111
112 double d = 0x1.2p3; /* hex frac 1.2(dec 1.125) scaled by 2^3, i.e. 9.0*/
113 d = 1.2e3;
114 d = 1e0;
115 d = 1.;
116 d = .1;
117 d = 15.0;
118 d = 0x1.ep+3;
119 d = 2.0e+308;
120 d = 1.0e-324;
121 d = -1.0e-324;
122 d = -2.0e+308;
123 }
124
125 /*http://example.com*/
126