/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/types.h>

#include <pexpert/pexpert.h>

#include "hfs.h"
#include "hfs_dbg.h"
#include "hfscommon/headers/FileMgrInternal.h"

/* 
 * gTimeZone should only be used for HFS volumes!
 * It is initialized when an HFS volume is mounted.
 */
struct timezone gTimeZone = {8*60,1};

/*
 * GetTimeUTC - get the GMT Mac OS time (in seconds since 1/1/1904)
 *
 * called by the Catalog Manager when creating/updating HFS Plus records
 */
u_int32_t GetTimeUTC(void)
{
	struct timeval tv;

	microtime(&tv);

	return (tv.tv_sec + MAC_GMT_FACTOR);
}


/*
 * LocalToUTC - convert from Mac OS local time to Mac OS GMT time.
 * This should only be called for HFS volumes (not for HFS Plus).
 */
u_int32_t LocalToUTC(u_int32_t localTime)
{
	u_int32_t gtime = localTime;
	
	if (gtime != 0) {
		gtime += (gTimeZone.tz_minuteswest * 60);
	/*
	 * We no longer do DST adjustments here since we don't
	 * know if time supplied needs adjustment!
	 *
	 * if (gTimeZone.tz_dsttime)
	 *     gtime -= 3600;
	 */
	}
    return (gtime);
}

/*
 * UTCToLocal - convert from Mac OS GMT time to Mac OS local time.
 * This should only be called for HFS volumes (not for HFS Plus).
 */
u_int32_t UTCToLocal(u_int32_t utcTime)
{
	u_int32_t ltime = utcTime;
	
	if (ltime != 0) {
		ltime -= (gTimeZone.tz_minuteswest * 60);
	/*
	 * We no longer do DST adjustments here since we don't
	 * know if time supplied needs adjustment!
	 *
	 * if (gTimeZone.tz_dsttime)
	 *     ltime += 3600;
	 */
	}
    return (ltime);
}

/*
 * to_bsd_time - convert from Mac OS time (seconds since 1/1/1904)
 *		 to BSD time (seconds since 1/1/1970)
 */
time_t to_bsd_time(u_int32_t hfs_time)
{
	u_int32_t gmt = hfs_time;

	if (gmt > MAC_GMT_FACTOR)
		gmt -= MAC_GMT_FACTOR;
	else
		gmt = 0;	/* don't let date go negative! */

	return (time_t)gmt;
}

/*
 * to_hfs_time - convert from BSD time (seconds since 1/1/1970)
 *		 to Mac OS time (seconds since 1/1/1904)
 */
u_int32_t to_hfs_time(time_t bsd_time)
{
	u_int32_t hfs_time = (u_int32_t)bsd_time;

	/* don't adjust zero - treat as uninitialzed */
	if (hfs_time != 0)
		hfs_time += MAC_GMT_FACTOR;

	return (hfs_time);
}


Ptr  NewPtrSysClear (Size byteCount)
{
    Ptr		tmptr;
    MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
    if (tmptr)
        bzero(tmptr, byteCount);
    return tmptr;
}



Ptr  NewPtr (Size byteCount)
{
    Ptr		tmptr;
    MALLOC (tmptr, Ptr, byteCount, M_TEMP, M_WAITOK);
    return tmptr;
}


void DisposePtr (Ptr p)
{
    FREE (p, M_TEMP);
}


void
DebugStr(
#if CONFIG_NO_KPRINTF_STRINGS
	__unused ConstStr255Param debuggerMsg
#else
	ConstStr255Param debuggerMsg
#endif
	)
{
    kprintf ("*** Mac OS Debugging Message: %s\n", &debuggerMsg[1]);
	DEBUG_BREAK;
}