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