845 lines
18 KiB
C++
Executable File
845 lines
18 KiB
C++
Executable File
//
|
|
// TIMEDATE.CPP
|
|
//
|
|
// Source file for ArchiveLib 2.0
|
|
//
|
|
// Copyright (c) Greenleaf Software, Inc. 1994-1996
|
|
// All Rights Reserved
|
|
//
|
|
// CONTENTS
|
|
//
|
|
// ALTimeDate::operator new()
|
|
// ALTimeDate::ALTimeDate()
|
|
// ALTimeDate::~ALTimeDate()
|
|
// ALTimeDate::ToJulian()
|
|
// ALTimeDate::FromJulian()
|
|
// ALTimeDate::GetUnixTime()
|
|
// ALTimeDate::SetTimeDate(long)
|
|
// ALTimeDate::SetTimeDate(struct tm *)
|
|
// ALTimeDate::GetTimeDate()
|
|
// ALTimeDate::GetDosTime()
|
|
// ALTimeDate::GetDosDate()
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This file contains all of the member functions of class ALTimeDate.
|
|
// This class is used only by ALStorage, but it seemed like a good
|
|
// idea to break it out in a separate class. A lot of the code in here
|
|
// came straight out of CommLib.
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// May 26, 1994 1.0A : First release
|
|
//
|
|
// August 10, 1994 1.0B : Modified a couple of #ifdefs to take UNIX into
|
|
// account.
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
#include "arclib.h"
|
|
#if !defined( AL_IBM )
|
|
#pragma hdrstop
|
|
#endif
|
|
|
|
#include <time.h>
|
|
#include "timedate.h"
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::operator new()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Memory allocator used when ArchiveLib resides in a 16 bit DLL.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// void * ALTimeDate::operator new( size_t size )
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// size : The number of bytes that the compiler has decided will be
|
|
// necessary to construct a new ALTime object.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// When using a DLL, it is easy to get into a dangerous situation when
|
|
// creating objects whose ctor and dtor are both in the DLL. The problem
|
|
// arises because when you create an object using new, the memory for
|
|
// the object will be allocated from the EXE. However, when you destroy
|
|
// the object using delete, the memory is freed inside the DLL. Since
|
|
// the DLL doesn't really own that memory, bad things can happen.
|
|
//
|
|
// But, you say, won't the space just go back to the Windows heap regardless
|
|
// of who tries to free it? Maybe, but maybe not. If the DLL is using
|
|
// a subsegment allocation scheme, it might do some sort of local free
|
|
// before returning the space to the windows heap. That is the point where
|
|
// you could conceivably cook your heap.
|
|
//
|
|
// By providing our own version of operator new inside this class, we
|
|
// ensure that all memory allocation for the class will be done from
|
|
// inside the DLL, not the EXE calling the DLL.
|
|
//
|
|
// Incidentally, I suspect that this function never gets called.
|
|
// ALTimeDate objects exist primarily as members of ALStorage. When
|
|
// that is the case, their memory is allocated as part of the memory
|
|
// allocation process for the ALStorage derived class.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// A pointer to some memory that should have been pulled out of the
|
|
// heap for the DLL.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
|
|
#if defined( AL_BUILDING_DLL )
|
|
|
|
void AL_DLL_FAR * AL_PROTO
|
|
ALTimeDate::operator new( size_t size ) /* Tag protected function */
|
|
{
|
|
return ::new char[ size ];
|
|
}
|
|
|
|
#endif
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::ALTimeDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// The ALTimeDate constructor.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// ALTimeDate::ALTimeDate();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// All the constructor does is initialize the data members. By
|
|
// setting the year to an invalid value of 0, we can always see
|
|
// that the time date stamp for a file hasn't been initialized.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// None.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// None, timedate objects are only constructed for use inside
|
|
// the library, as members of ALStorage objects.
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
AL_PROTO
|
|
ALTimeDate::ALTimeDate() /* Tag public function */
|
|
{
|
|
miYear = 0; //This is an illegal year, means it is uninitialized
|
|
miMonth = 0;
|
|
miDate = 0;
|
|
miHour = 0;
|
|
miMinute = 0;
|
|
miSecond = 0;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::~ALTimeDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// The ALTimeDate destructor.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// ALTimeDate::~ALTimeDate();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// The destructor has nothing to do.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// None.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// None, timedate objects are only constructed for use inside
|
|
// the library, as members of ALStorage objects. Thus, they are
|
|
// only destroyed inside the library.
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
AL_PROTO
|
|
ALTimeDate::~ALTimeDate() /* Tag public function */
|
|
{
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::ToJulian()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Return the Julian date for the given ALTimeDate object.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// long ALTimeDate::ToJulian();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This function is used to make a Julian day number from a normal
|
|
// month/day/year thing. We need a Julian day in order to make a
|
|
// UNIX style time stamp. The UNIX time stamp is used to store
|
|
// time stamps in Archive directories.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// The Julian-like date.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
long AL_PROTO
|
|
ALTimeDate::ToJulian() /* Tag public function */
|
|
{
|
|
return (long)( miDate - 32076)
|
|
+ 1461L * ( miYear + 4800L + ( miMonth - 14) / 12) / 4
|
|
+ 367 * ( miMonth - 2 - ( miMonth - 14) / 12 * 12) / 12
|
|
- 3 * (( miYear + 4900L + ( miMonth - 14) / 12) / 100) / 4
|
|
+ 1;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::FromJulian()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert a Julian-style date to an ALTimeDate object.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// void ALTimeDate::FromJulian( long jdn );
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// jdn : A julian date number, ideally one produced by ToJulian().
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This function is used to convert a julian date to a normal
|
|
// year/month/day. Time/date stamps are stored in Archives in
|
|
// UNIX format. This function is needed to convert a UNIX
|
|
// time stamp to a normal mm/dd/yy.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// Nothing.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
void AL_PROTO
|
|
ALTimeDate::FromJulian( long jdn ) /* Tag public function */
|
|
{
|
|
long x;
|
|
long z;
|
|
long m;
|
|
long d;
|
|
long y;
|
|
const long daysPer400Years = 146097L;
|
|
const long fudgedDaysPer4000Years = 1460970L + 31;
|
|
|
|
x = jdn + 68569L;
|
|
z = 4 * x / daysPer400Years;
|
|
x = x - (daysPer400Years * z + 3) / 4;
|
|
y = 4000 * (x + 1) / fudgedDaysPer4000Years;
|
|
x = x - 1461 * y / 4 + 31;
|
|
m = 80 * x / 2447;
|
|
d = x - 2447 * m / 80;
|
|
x = m / 11;
|
|
m = m + 2 - 12 * x;
|
|
y = 100 * (z - 49) + y + x;
|
|
//
|
|
// I don't know whether or not we could eliminate these temporary longs
|
|
//
|
|
miYear = (short int) y;
|
|
miMonth = (short int) m;
|
|
miDate = (short int) d;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::GetUnixTime()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert an ALTimeDate objects to a Unix-style time number
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// long ALTimeDate::GetUnixTime();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This function is used to convert the m/d/y h:m:s time stamp for a file
|
|
// into a UNIX time stamp. The UNIX time stamp is a 32 bit long that
|
|
// is used to store time stamps in an Archive.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// A UNIX time, converted from the internal m/d/y h:m:s data.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
long AL_PROTO
|
|
ALTimeDate::GetUnixTime() /* Tag public function */
|
|
{
|
|
const long UnixFirstDay = 2440588L;
|
|
long result;
|
|
|
|
result = ToJulian();
|
|
result -= UnixFirstDay;
|
|
if ( result >= 0L ) {
|
|
result *= 3600L * 24;
|
|
result += 3600L * miHour;
|
|
result += 60L * miMinute;
|
|
result += miSecond;
|
|
} else
|
|
result = 0L;
|
|
return result;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::SetTimeDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert a Unix-style time number to an ALTimeDate object.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// void ALTimeDate::SetTimeDate( long unix_time );
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// unix_time : A long integer in UNIX timestamp format.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This function is called when we are reading a directory in from
|
|
// an archive. It is used to set the internal data members of an
|
|
// ALTimeDate object, after converting from unix time.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// Nothing.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
void AL_PROTO
|
|
ALTimeDate::SetTimeDate( long unix_time ) /* Tag public function */
|
|
{
|
|
const long UnixFirstDay = 2440588L;
|
|
|
|
long jd = unix_time / ( 3600L * 24 );
|
|
long hms = unix_time % ( 3600L * 24 );
|
|
FromJulian( jd + UnixFirstDay );
|
|
miHour = (short int) ( hms / 3600 );
|
|
hms -= 3600L * miHour;
|
|
miMinute = (short int) ( hms / 60 );
|
|
miSecond = (short int) ( hms - ( miMinute * 60 ) );
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::SetTimeDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert a C-style tm structure to an ALTimeDate object.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// void ALTimeDate::SetTimeDate( struct tm *tblock );
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// tblock : A time date stamp as used by the C run time library.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// When working with DOS files, time stamps are read in to a structure
|
|
// in the struct tm format. This function provides an easy way to convert
|
|
// the structure into our internal format. When a DOS file is opened
|
|
// using Open(), this function is called.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// Nothing.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
void AL_PROTO
|
|
ALTimeDate::SetTimeDate( struct tm AL_DLL_FAR *tblock ) /* Tag public function */
|
|
{
|
|
AL_ASSERT( tblock != 0, "SetTimeDate: passing illegal null parameter" );
|
|
miYear = (short int) ( tblock->tm_year + 1900 );
|
|
miMonth = (short int) ( tblock->tm_mon + 1 );
|
|
miDate = (short int) tblock->tm_mday;
|
|
miHour = (short int) tblock->tm_hour;
|
|
miMinute = (short int) tblock->tm_min;
|
|
miSecond = (short int) tblock->tm_sec;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::GetTimeDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert an ALTimeDate object to a C-style tm structure.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// void ALTimeDate::GetTimeDate( struct tm *tblock );
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// tblock : A structure in the format used by the C runtime library for
|
|
// storing time and date stamps.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// This function provides the reverse of SetTimeDate(). You would think
|
|
// that we could just set the appropriate members of struct tm, but
|
|
// there is a problem with that. struct tm has one element that is
|
|
// supposed to be the day of the week, and another that is supposed
|
|
// to be the number of the day within the year. We could try to
|
|
// figure those out using the julian day function, but since gmtime()
|
|
// will figure them out for us, we'll use that instead.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// Nothing.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
void AL_PROTO
|
|
ALTimeDate::GetTimeDate( struct tm AL_DLL_FAR *tblock ) /* Tag public function */
|
|
{
|
|
AL_ASSERT( tblock != 0, "GetTimeDate: passing illegal null parameter" );
|
|
long unix_time = GetUnixTime();
|
|
struct tm AL_DLL_FAR *result = gmtime( (const time_t *) &unix_time );
|
|
if ( result ) {
|
|
*tblock = *result;
|
|
tblock->tm_isdst = 0;
|
|
} else { //This should never happen!
|
|
tblock->tm_year = miYear - 1900;
|
|
tblock->tm_mon = miMonth - 1;
|
|
tblock->tm_mday = miDate;
|
|
tblock->tm_hour = miHour;
|
|
tblock->tm_min = miMinute;
|
|
tblock->tm_sec = miSecond;
|
|
tblock->tm_wday = 0;
|
|
tblock->tm_yday = 0;
|
|
tblock->tm_isdst = 0;
|
|
}
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::GetDosTime()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert the time portion of an ALTimeDate object to 16 bit DOS format.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// unsigned short int ALTimeDate::GetDosTime();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// When we close a file that needs to have its time and date stamp
|
|
// set, we normally use the _dos_setftime() function to do the
|
|
// work. It expects to see the time packed into a particular
|
|
// sequence of bits in an unsigned short. That is what this
|
|
// function does. It packs the bits just the way you want them.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// This function returns the time stored in this. The bits of the
|
|
// time are packed into the form that is needed by the _dos_setftime()
|
|
// format.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
unsigned short int AL_PROTO
|
|
ALTimeDate::GetDosTime() /* Tag public function */
|
|
{
|
|
int result;
|
|
result = miSecond / 2;
|
|
result |= miMinute << 5;
|
|
result |= miHour << 11;
|
|
return (unsigned short int) result;
|
|
}
|
|
|
|
//
|
|
// NAME
|
|
//
|
|
// ALTimeDate::GetDosDate()
|
|
//
|
|
// PLATFORMS/ENVIRONMENTS
|
|
//
|
|
// Console Windows PM
|
|
// C++
|
|
//
|
|
// SHORT DESCRIPTION
|
|
//
|
|
// Convert the date portion of an ALTimeDate object to 16 bit DOS format.
|
|
//
|
|
// C++ SYNOPSIS
|
|
//
|
|
// #include "arclib.h"
|
|
//
|
|
// unsigned short int ALTimeDate::GetDosDate();
|
|
//
|
|
// C SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// VB SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// DELPHI SYNOPSIS
|
|
//
|
|
// None, class ALTimedate is not exported to C/VB/Delphi.
|
|
//
|
|
// ARGUMENTS
|
|
//
|
|
// None.
|
|
//
|
|
// DESCRIPTION
|
|
//
|
|
// When we close a file that needs to have its time and date stamp
|
|
// set, we normally use the _dos_setftime() function to do the
|
|
// work. It expects to see the date packed into a particular
|
|
// sequence of bits in an unsigned short. That is what this
|
|
// function does. It packs the bits just the way you want them.
|
|
//
|
|
// RETURNS
|
|
//
|
|
// This function returns the date stored in this. The bits of the
|
|
// date are packed into the form that is needed by the _dos_setftime()
|
|
// format.
|
|
//
|
|
// EXAMPLE
|
|
//
|
|
// SEE ALSO
|
|
//
|
|
// REVISION HISTORY
|
|
//
|
|
// February 14, 1996 2.0A : New release.
|
|
//
|
|
|
|
unsigned short int AL_PROTO
|
|
ALTimeDate::GetDosDate() /* Tag public function */
|
|
{
|
|
int result;
|
|
result = miDate;
|
|
result |= miMonth << 5;
|
|
result |= (miYear-1980) << 9;
|
|
return (unsigned short int ) result;
|
|
}
|