reactos/base/shell/cmd/shift.c

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/*
* SHIFT.C - shift internal batch command
*
*
* History:
*
* 16 Jul 1998 (Hans B Pufal)
* started.
*
* 16 Jul 1998 (John P Price)
* Separated commands into individual files.
*
* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* added config.h include
*
* 07-Jan-1999 (Eric Kohl)
* Added help text ("shift /?") and cleaned up.
*
* 20-Jan-1999 (Eric Kohl)
* Unicode and redirection safe!
*
* 30-Apr-2005 (Magnus Olsen <magnus@greatlord.com>)
* Remove all hardcoded strings in En.rc
*/
#include "precomp.h"
/*
* Perform the SHIFT command.
*
* Only valid inside batch files.
*
* FREEDOS extension : optional parameter DOWN to allow shifting
* parameters backwards.
*
*/
INT cmd_shift (LPTSTR param)
{
INT i = 0;
TRACE ("cmd_shift: (\'%s\')\n", debugstr_aw(param));
if (!_tcsncmp (param, _T("/?"), 2))
{
ConOutResPaging(TRUE,STRING_SHIFT_HELP);
return 0;
}
nErrorLevel = 0;
if (bc == NULL)
{
/* not in batch - error!! */
nErrorLevel = 1;
return 1;
}
if (!_tcsicmp (param, _T("down")))
{
if (bc->shiftlevel[0])
for (; i <= 9; i++)
bc->shiftlevel[i]--;
}
else /* shift up */
{
if (*param == _T('/'))
{
if (param[1] < '0' || param[1] > '9')
{
error_invalid_switch(param[1]);
return 1;
}
i = param[1] - '0';
}
for (; i < 9; i++)
bc->shiftlevel[i] = bc->shiftlevel[i + 1];
bc->shiftlevel[i]++;
}
return 0;
}
/* EOF */