bsd/hfs/MacOSStubs.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <sys/param.h>
  23 #include <sys/systm.h>
  24 #include <sys/kernel.h>
  25 #include <sys/malloc.h>
  26 #include <sys/types.h>
  27
  28 #include "hfs.h"
  29 #include "hfs_dbg.h"
  30 #include "hfscommon/headers/FileMgrInternal.h"
  31
  32
  33 /*
  34  * gTimeZone should only be used for HFS volumes!
  35  * It is initialized when an HFS volume is mounted.
  36  */
  37 struct timezone gTimeZone = {8*60,1};
  38
  39 /*
  40  * GetTimeUTC - get the GMT Mac OS time (in seconds since 1/1/1904)
  41  *
  42  * called by the Catalog Manager when creating/updating HFS Plus records
  43  */
  44 UInt32 GetTimeUTC(void)
  45 {
  46         struct timeval tv;
  47
  48         microtime(&tv);
  49
  50         return (tv.tv_sec + MAC_GMT_FACTOR);
  51 }
  52
  53
  54 /*
  55  * LocalToUTC - convert from Mac OS local time to Mac OS GMT time.
  56  * This should only be called for HFS volumes (not for HFS Plus).
  57  */
  58 UInt32 LocalToUTC(UInt32 localTime)
  59 {
  60         UInt32 gtime = localTime;
  61
  62         if (gtime != 0) {
  63                 gtime += (gTimeZone.tz_minuteswest * 60);
  64         /*
  65          * We no longer do DST adjustments here since we don't
  66          * know if time supplied needs adjustment!
  67          *
  68          * if (gTimeZone.tz_dsttime)
  69          *     gtime -= 3600;
  70          */
  71         }
  72     return (gtime);
  73 }
  74
  75 /*
  76  * UTCToLocal - convert from Mac OS GMT time to Mac OS local time.
  77  * This should only be called for HFS volumes (not for HFS Plus).
  78  */
  79 UInt32 UTCToLocal(UInt32 utcTime)
  80 {
  81         UInt32 ltime = utcTime;
  82
  83         if (ltime != 0) {
  84                 ltime -= (gTimeZone.tz_minuteswest * 60);
  85         /*
  86          * We no longer do DST adjustments here since we don't
  87          * know if time supplied needs adjustment!
  88          *
  89          * if (gTimeZone.tz_dsttime)
  90          *     ltime += 3600;
  91          */
  92         }
  93     return (ltime);
  94 }
  95
  96 /*
  97  * to_bsd_time - convert from Mac OS time (seconds since 1/1/1904)
  98  *               to BSD time (seconds since 1/1/1970)
  99  */
 100 time_t to_bsd_time(u_int32_t hfs_time)
 101 {
 102         u_int32_t gmt = hfs_time;
 103
 104         if (gmt > MAC_GMT_FACTOR)
 105                 gmt -= MAC_GMT_FACTOR;
 106         else
 107                 gmt = 0;        /* don't let date go negative! */
 108
 109         return (time_t)gmt;
 110 }
 111
 112 /*
 113  * to_hfs_time - convert from BSD time (seconds since 1/1/1970)
 114  *               to Mac OS time (seconds since 1/1/1904)
 115  */
 116 u_int32_t to_hfs_time(time_t bsd_time)
 117 {
 118         u_int32_t hfs_time = (u_int32_t)bsd_time;
 119
 120         /* don't adjust zero - treat as uninitialzed */
 121         if (hfs_time != 0)
 122                 hfs_time += MAC_GMT_FACTOR;
 123
 124         return (hfs_time);
 125 }
 126
 127
 128 Ptr  NewPtrSysClear (Size byteCount)
 129 {
 130     Ptr         tmptr;
 131     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 132     if (tmptr)
 133         bzero(tmptr, byteCount);
 134     return tmptr;
 135 }
 136
 137
 138
 139 Ptr  NewPtr (Size byteCount)
 140 {
 141     Ptr         tmptr;
 142     MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
 143     return tmptr;
 144 }
 145
 146
 147 void DisposePtr (Ptr p)
 148 {
 149     FREE (p, M_TEMP);
 150 }
 151
 152
 153 void DebugStr (ConstStr255Param  debuggerMsg)
 154 {
 155     kprintf ("*** Mac OS Debugging Message: %s\n", &debuggerMsg[1]);
 156         DEBUG_BREAK;
 157 }
 158