bsd/hfs/MacOSStubs.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/malloc.h>
  34 #include <sys/types.h>
  35
  36 #include "hfs.h"
  37 #include "hfs_dbg.h"
  38 #include "hfscommon/headers/FileMgrInternal.h"
  39
  40
  41 /*
  42  * gTimeZone should only be used for HFS volumes!
  43  * It is initialized when an HFS volume is mounted.
  44  */
  45 struct timezone gTimeZone = {8*60,1};
  46
  47 /*
  48  * GetTimeUTC - get the GMT Mac OS time (in seconds since 1/1/1904)
  49  *
  50  * called by the Catalog Manager when creating/updating HFS Plus records
  51  */
  52 UInt32 GetTimeUTC(void)
  53 {
  54         struct timeval tv;
  55
  56         microtime(&tv);
  57
  58         return (tv.tv_sec + MAC_GMT_FACTOR);
  59 }
  60
  61
  62 /*
  63  * LocalToUTC - convert from Mac OS local time to Mac OS GMT time.
  64  * This should only be called for HFS volumes (not for HFS Plus).
  65  */
  66 UInt32 LocalToUTC(UInt32 localTime)
  67 {
  68         UInt32 gtime = localTime;
  69
  70         if (gtime != 0) {
  71                 gtime += (gTimeZone.tz_minuteswest * 60);
  72         /*
  73          * We no longer do DST adjustments here since we don't
  74          * know if time supplied needs adjustment!
  75          *
  76          * if (gTimeZone.tz_dsttime)
  77          *     gtime -= 3600;
  78          */
  79         }
  80     return (gtime);
  81 }
  82
  83 /*
  84  * UTCToLocal - convert from Mac OS GMT time to Mac OS local time.
  85  * This should only be called for HFS volumes (not for HFS Plus).
  86  */
  87 UInt32 UTCToLocal(UInt32 utcTime)
  88 {
  89         UInt32 ltime = utcTime;
  90
  91         if (ltime != 0) {
  92                 ltime -= (gTimeZone.tz_minuteswest * 60);
  93         /*
  94          * We no longer do DST adjustments here since we don't
  95          * know if time supplied needs adjustment!
  96          *
  97          * if (gTimeZone.tz_dsttime)
  98          *     ltime += 3600;
  99          */
 100         }
 101     return (ltime);
 102 }
 103
 104 /*
 105  * to_bsd_time - convert from Mac OS time (seconds since 1/1/1904)
 106  *               to BSD time (seconds since 1/1/1970)
 107  */
 108 time_t to_bsd_time(u_int32_t hfs_time)
 109 {
 110         u_int32_t gmt = hfs_time;
 111
 112         if (gmt > MAC_GMT_FACTOR)
 113                 gmt -= MAC_GMT_FACTOR;
 114         else
 115                 gmt = 0;        /* don't let date go negative! */
 116
 117         return (time_t)gmt;
 118 }
 119
 120 /*
 121  * to_hfs_time - convert from BSD time (seconds since 1/1/1970)
 122  *               to Mac OS time (seconds since 1/1/1904)
 123  */
 124 u_int32_t to_hfs_time(time_t bsd_time)
 125 {
 126         u_int32_t hfs_time = (u_int32_t)bsd_time;
 127
 128         /* don't adjust zero - treat as uninitialzed */
 129         if (hfs_time != 0)
 130                 hfs_time += MAC_GMT_FACTOR;
 131
 132         return (hfs_time);
 133 }
 134
 135
 136 Ptr  NewPtrSysClear (Size byteCount)
 137 {
 138     Ptr         tmptr;
 139     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 140     if (tmptr)
 141         bzero(tmptr, byteCount);
 142     return tmptr;
 143 }
 144
 145
 146
 147 Ptr  NewPtr (Size byteCount)
 148 {
 149     Ptr         tmptr;
 150     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 151     return tmptr;
 152 }
 153
 154
 155 void DisposePtr (Ptr p)
 156 {
 157     FREE (p, M_TEMP);
 158 }
 159
 160
 161 void DebugStr (ConstStr255Param  debuggerMsg)
 162 {
 163     kprintf ("*** Mac OS Debugging Message: %s\n", &debuggerMsg[1]);
 164         DEBUG_BREAK;
 165 }
 166