subsys/system/cmd/cls.c

   1 /*
   2  *  CLS.C - clear screen internal command.
   3  *
   4  *
   5  *  History:
   6  *
   7  *    07/27/1998 (John P. Price)
   8  *        started.
   9  *
  10  *    27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
  11  *        added config.h include
  12  *
  13  *    04-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
  14  *        Changed to Win32 console app.
  15  *
  16  *    08-Dec-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
  17  *        Added help text ("/?").
  18  *
  19  *    14-Jan-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
  20  *        Unicode ready!
  21  *
  22  *    20-Jan-1998 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
  23  *        Redirection ready!
  24  */
  25
  26 #include "config.h"
  27
  28 #ifdef INCLUDE_CMD_CLS
  29
  30 #include <windows.h>
  31 #include <tchar.h>
  32 #include <string.h>
  33
  34 #include "cmd.h"
  35
  36
  37 INT cmd_cls (LPTSTR cmd, LPTSTR param)
  38 {
  39         DWORD dwWritten;
  40         CONSOLE_SCREEN_BUFFER_INFO csbi;
  41         COORD coPos;
  42
  43         if (!_tcsncmp (param, _T("/?"), 2))
  44         {
  45                 ConOutPuts (_T("Clears the screen.\n\nCLS"));
  46                 return 0;
  47         }
  48
  49         GetConsoleScreenBufferInfo (hConsole, &csbi);
  50
  51         coPos.X = 0;
  52         coPos.Y = 0;
  53         FillConsoleOutputAttribute (hConsole, wColor,
  54                                                                 (csbi.dwSize.X)*(csbi.dwSize.Y),
  55                                                                 coPos, &dwWritten);
  56         FillConsoleOutputCharacter (hConsole, _T(' '),
  57                                                                 (csbi.dwSize.X)*(csbi.dwSize.Y),
  58                                                                 coPos, &dwWritten);
  59         SetConsoleCursorPosition (hConsole, coPos);
  60
  61         bIgnoreEcho = TRUE;
  62
  63         return 0;
  64 }
  65 #endif