bsd/hfs/MacOSStubs.c

   1 /*
   2  * Copyright (c) 2000-2004 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 "hfs.h"
  35 #include "hfs_dbg.h"
  36 #include "hfscommon/headers/FileMgrInternal.h"
  37
  38
  39 /*
  40  * gTimeZone should only be used for HFS volumes!
  41  * It is initialized when an HFS volume is mounted.
  42  */
  43 struct timezone gTimeZone = {8*60,1};
  44
  45 /*
  46  * GetTimeUTC - get the GMT Mac OS time (in seconds since 1/1/1904)
  47  *
  48  * called by the Catalog Manager when creating/updating HFS Plus records
  49  */
  50 UInt32 GetTimeUTC(void)
  51 {
  52         struct timeval tv;
  53
  54         microtime(&tv);
  55
  56         return (tv.tv_sec + MAC_GMT_FACTOR);
  57 }
  58
  59
  60 /*
  61  * LocalToUTC - convert from Mac OS local time to Mac OS GMT time.
  62  * This should only be called for HFS volumes (not for HFS Plus).
  63  */
  64 UInt32 LocalToUTC(UInt32 localTime)
  65 {
  66         UInt32 gtime = localTime;
  67
  68         if (gtime != 0) {
  69                 gtime += (gTimeZone.tz_minuteswest * 60);
  70         /*
  71          * We no longer do DST adjustments here since we don't
  72          * know if time supplied needs adjustment!
  73          *
  74          * if (gTimeZone.tz_dsttime)
  75          *     gtime -= 3600;
  76          */
  77         }
  78     return (gtime);
  79 }
  80
  81 /*
  82  * UTCToLocal - convert from Mac OS GMT time to Mac OS local time.
  83  * This should only be called for HFS volumes (not for HFS Plus).
  84  */
  85 UInt32 UTCToLocal(UInt32 utcTime)
  86 {
  87         UInt32 ltime = utcTime;
  88
  89         if (ltime != 0) {
  90                 ltime -= (gTimeZone.tz_minuteswest * 60);
  91         /*
  92          * We no longer do DST adjustments here since we don't
  93          * know if time supplied needs adjustment!
  94          *
  95          * if (gTimeZone.tz_dsttime)
  96          *     ltime += 3600;
  97          */
  98         }
  99     return (ltime);
 100 }
 101
 102 /*
 103  * to_bsd_time - convert from Mac OS time (seconds since 1/1/1904)
 104  *               to BSD time (seconds since 1/1/1970)
 105  */
 106 time_t to_bsd_time(u_int32_t hfs_time)
 107 {
 108         u_int32_t gmt = hfs_time;
 109
 110         if (gmt > MAC_GMT_FACTOR)
 111                 gmt -= MAC_GMT_FACTOR;
 112         else
 113                 gmt = 0;        /* don't let date go negative! */
 114
 115         return (time_t)gmt;
 116 }
 117
 118 /*
 119  * to_hfs_time - convert from BSD time (seconds since 1/1/1970)
 120  *               to Mac OS time (seconds since 1/1/1904)
 121  */
 122 u_int32_t to_hfs_time(time_t bsd_time)
 123 {
 124         u_int32_t hfs_time = (u_int32_t)bsd_time;
 125
 126         /* don't adjust zero - treat as uninitialzed */
 127         if (hfs_time != 0)
 128                 hfs_time += MAC_GMT_FACTOR;
 129
 130         return (hfs_time);
 131 }
 132
 133
 134 Ptr  NewPtrSysClear (Size byteCount)
 135 {
 136     Ptr         tmptr;
 137     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 138     if (tmptr)
 139         bzero(tmptr, byteCount);
 140     return tmptr;
 141 }
 142
 143
 144
 145 Ptr  NewPtr (Size byteCount)
 146 {
 147     Ptr         tmptr;
 148     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 149     return tmptr;
 150 }
 151
 152
 153 void DisposePtr (Ptr p)
 154 {
 155     FREE (p, M_TEMP);
 156 }
 157
 158
 159 void DebugStr (ConstStr255Param  debuggerMsg)
 160 {
 161     kprintf ("*** Mac OS Debugging Message: %s\n", &debuggerMsg[1]);
 162         DEBUG_BREAK;
 163 }
 164