reactos/rosapps/cmd/date.c

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/*
* DATE.C - date internal command.
*
*
* History:
*
* 08 Jul 1998 (John P. Price)
* started.
*
* 20 Jul 1998 (John P. Price)
* corrected number of days for December from 30 to 31.
* (Thanx to Steffen Kaiser for bug report)
*
* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* added config.h include
*
* 29-Jul-1998 (Rob Lake)
* fixed stand-alone mode.
* Added Pacific C compatible dos_getdate functions
*
* 09-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Added locale support
*
* 23-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Unicode and redirection safe!
*
* 04-Feb-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
* Fixed date input bug.
*/
#include "config.h"
#ifdef INCLUDE_CMD_DATE
#include <windows.h>
#include <tchar.h>
#include <string.h>
#include <ctype.h>
#include "cmd.h"
static WORD awMonths[2][13] =
{
{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static VOID
PrintDateString (VOID)
{
switch (nDateFormat)
{
case 0: /* mmddyy */
default:
ConOutPrintf (_T("\nEnter new date (mm%cdd%cyyyy): "),
cDateSeparator, cDateSeparator);
break;
case 1: /* ddmmyy */
ConOutPrintf (_T("\nEnter new date (dd%cmm%cyyyy): "),
cDateSeparator, cDateSeparator);
break;
case 2: /* yymmdd */
ConOutPrintf (_T("\nEnter new date (yyyy%cmm%cdd): "),
cDateSeparator, cDateSeparator);
break;
}
}
static BOOL
ReadNumber (LPTSTR *s, LPWORD lpwValue)
{
if (_istdigit (**s))
{
while (_istdigit (**s))
{
*lpwValue = *lpwValue * 10 + **s - _T('0');
(*s)++;
}
return TRUE;
}
return FALSE;
}
static BOOL
ReadSeparator (LPTSTR *s)
{
if (**s == _T('/') || **s == _T('-') || **s == cDateSeparator)
{
(*s)++;
return TRUE;
}
return FALSE;
}
static BOOL
ParseDate (LPTSTR s)
{
SYSTEMTIME d;
unsigned char leap;
LPTSTR p = s;
if (!*s)
return TRUE;
GetLocalTime (&d);
d.wYear = 0;
d.wDay = 0;
d.wMonth = 0;
switch (nDateFormat)
{
case 0: /* mmddyy */
default:
if (!ReadNumber (&p, &d.wMonth))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wDay))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wYear))
return FALSE;
break;
case 1: /* ddmmyy */
if (!ReadNumber (&p, &d.wDay))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wMonth))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wYear))
return FALSE;
break;
case 2: /* yymmdd */
if (!ReadNumber (&p, &d.wYear))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wMonth))
return FALSE;
if (!ReadSeparator (&p))
return FALSE;
if (!ReadNumber (&p, &d.wDay))
return FALSE;
break;
}
/* if only entered two digits: */
/* assume 2000's if value less than 80 */
/* assume 1900's if value greater or equal 80 */
if (d.wYear <= 99)
{
if (d.wYear >= 80)
d.wYear = 1900 + d.wYear;
else
d.wYear = 2000 + d.wYear;
}
leap = (!(d.wYear % 4) && (d.wYear % 100)) || !(d.wYear % 400);
if ((d.wMonth >= 1 && d.wMonth <= 12) &&
(d.wDay >= 1 && d.wDay <= awMonths[leap][d.wMonth]) &&
(d.wYear >= 1980 && d.wYear <= 2099))
{
SetLocalTime (&d);
return TRUE;
}
return FALSE;
}
INT cmd_date (LPTSTR cmd, LPTSTR param)
{
LPTSTR *arg;
INT argc;
INT i;
BOOL bPrompt = TRUE;
INT nDateString = -1;
if (!_tcsncmp (param, _T("/?"), 2))
{
ConOutPuts (_T("Displays or sets the date.\n\n"
"DATE [/T][date]\n\n"
" /T display only\n\n"
"Type DATE without parameters to display the current date setting and\n"
"a prompt for a new one. Press ENTER to keep the same date."));
return 0;
}
/* build parameter array */
arg = split (param, &argc);
/* check for options */
for (i = 0; i < argc; i++)
{
if (_tcsicmp (arg[i], _T("/t")) == 0)
bPrompt = FALSE;
if ((*arg[i] != _T('/')) && (nDateString == -1))
nDateString = i;
}
if (nDateString == -1)
PrintDate ();
if (!bPrompt)
{
freep (arg);
return 0;
}
if (nDateString == -1)
{
while (TRUE) /* forever loop */
{
TCHAR s[40];
PrintDateString ();
ConInString (s, 40);
#ifdef _DEBUG
DebugPrintf ("\'%s\'\n", s);
#endif
while (*s && s[_tcslen (s) - 1] < ' ')
s[_tcslen (s) - 1] = '\0';
if (ParseDate (s))
{
freep (arg);
return 0;
}
ConErrPuts ("Invalid date.");
}
}
else
{
if (ParseDate (arg[nDateString]))
{
freep (arg);
return 0;
}
ConErrPuts ("Invalid date.");
}
freep (arg);
return 0;
}
#endif