1/*
2 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/kernel.h>
31#include <sys/malloc.h>
32#include <sys/types.h>
33
34#include <pexpert/pexpert.h>
35
36#include "hfs.h"
37#include "hfs_dbg.h"
38#include "hfscommon/headers/FileMgrInternal.h"
39
40/*
41 * gTimeZone should only be used for HFS volumes!
42 * It is initialized when an HFS volume is mounted.
43 */
44struct timezone gTimeZone = {8*60,1};
45
46/*
47 * GetTimeUTC - get the GMT Mac OS time (in seconds since 1/1/1904)
48 *
49 * called by the Catalog Manager when creating/updating HFS Plus records
50 */
51u_int32_t GetTimeUTC(void)
52{
53	struct timeval tv;
54
55	microtime(&tv);
56
57	return (tv.tv_sec + MAC_GMT_FACTOR);
58}
59
60
61/*
62 * LocalToUTC - convert from Mac OS local time to Mac OS GMT time.
63 * This should only be called for HFS volumes (not for HFS Plus).
64 */
65u_int32_t LocalToUTC(u_int32_t localTime)
66{
67	u_int32_t gtime = localTime;
68
69	if (gtime != 0) {
70		gtime += (gTimeZone.tz_minuteswest * 60);
71	/*
72	 * We no longer do DST adjustments here since we don't
73	 * know if time supplied needs adjustment!
74	 *
75	 * if (gTimeZone.tz_dsttime)
76	 *     gtime -= 3600;
77	 */
78	}
79    return (gtime);
80}
81
82/*
83 * UTCToLocal - convert from Mac OS GMT time to Mac OS local time.
84 * This should only be called for HFS volumes (not for HFS Plus).
85 */
86u_int32_t UTCToLocal(u_int32_t utcTime)
87{
88	u_int32_t ltime = utcTime;
89
90	if (ltime != 0) {
91		ltime -= (gTimeZone.tz_minuteswest * 60);
92	/*
93	 * We no longer do DST adjustments here since we don't
94	 * know if time supplied needs adjustment!
95	 *
96	 * if (gTimeZone.tz_dsttime)
97	 *     ltime += 3600;
98	 */
99	}
100    return (ltime);
101}
102
103/*
104 * to_bsd_time - convert from Mac OS time (seconds since 1/1/1904)
105 *		 to BSD time (seconds since 1/1/1970)
106 */
107time_t to_bsd_time(u_int32_t hfs_time)
108{
109	u_int32_t gmt = hfs_time;
110
111	if (gmt > MAC_GMT_FACTOR)
112		gmt -= MAC_GMT_FACTOR;
113	else
114		gmt = 0;	/* don't let date go negative! */
115
116	return (time_t)gmt;
117}
118
119/*
120 * to_hfs_time - convert from BSD time (seconds since 1/1/1970)
121 *		 to Mac OS time (seconds since 1/1/1904)
122 */
123u_int32_t to_hfs_time(time_t bsd_time)
124{
125	u_int32_t hfs_time = (u_int32_t)bsd_time;
126
127	/* don't adjust zero - treat as uninitialzed */
128	if (hfs_time != 0)
129		hfs_time += MAC_GMT_FACTOR;
130
131	return (hfs_time);
132}
133
134
135Ptr  NewPtrSysClear (Size byteCount)
136{
137    Ptr		tmptr;
138    MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
139    if (tmptr)
140        bzero(tmptr, byteCount);
141    return tmptr;
142}
143
144
145
146Ptr  NewPtr (Size byteCount)
147{
148    Ptr		tmptr;
149    MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
150    return tmptr;
151}
152
153
154void DisposePtr (Ptr p)
155{
156    FREE (p, M_TEMP);
157}
158
159
160void
161DebugStr(
162	const char * debuggerMsg
163	)
164{
165    kprintf ("*** Mac OS Debugging Message: %s\n", debuggerMsg);
166	DEBUG_BREAK;
167}
168
169