mirror of
https://github.com/reactos/reactos.git
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156 lines
3.1 KiB
C
156 lines
3.1 KiB
C
/*
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* IF.C - if internal batch command.
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*
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*
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* History:
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*
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* 16 Jul 1998 (Hans B Pufal)
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* started.
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*
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* 16 Jul 1998 (John P Price)
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* Seperated commands into individual files.
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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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* 07-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Added help text ("if /?") and cleaned up.
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*
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* 21-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Unicode and redirection ready!
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*/
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#include "config.h"
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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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#include "batch.h"
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#define X_EXEC 1
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#define X_EMPTY 0x80
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INT cmd_if (LPTSTR cmd, LPTSTR param)
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{
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INT x_flag = 0; /* when set cause 'then' clause to be executed */
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LPTSTR pp;
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#ifdef _DEBUG
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DebugPrintf ("cmd_if: (\'%s\', \'%s\'\n", cmd, param);
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#endif
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if (!_tcsncmp (param, _T("/?"), 2))
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{
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ConOutPuts (_T("IF :"));
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return 0;
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}
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/* First check if param string begins with word 'not' */
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if (!_tcsnicmp (param, _T("not"), 3) && _istspace (*(param + 3)))
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{
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x_flag = X_EXEC; /* Remember 'NOT' */
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param += 3; /* Step over 'NOT' */
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while (_istspace (*param)) /* And subsequent spaces */
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param++;
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}
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/* Check for 'exist' form */
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if (!_tcsnicmp (param, _T("exist"), 5) && _istspace (*(param + 5)))
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{
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param += 5;
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while (_istspace (*param))
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param++;
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pp = param;
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while (*pp && !_istspace (*pp))
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pp++;
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if (*pp)
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{
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WIN32_FIND_DATA f;
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HANDLE hFind;
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*pp++ = _T('\0');
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hFind = FindFirstFile (param, &f);
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x_flag ^= (hFind != INVALID_HANDLE_VALUE) ? 0 : X_EXEC;
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if (hFind != INVALID_HANDLE_VALUE)
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FindClose (hFind);
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}
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else
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return 0;
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}
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/* Check for 'errorlevel' form */
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else if (!_tcsnicmp (param, _T("errorlevel"), 10) && _istspace (*(param + 10)))
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{
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INT n = 0;
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pp = param + 10;
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while (_istspace (*pp))
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pp++;
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while (_istdigit (*pp))
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n = n * 10 + (*pp++ - _T('0'));
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x_flag ^= (nErrorLevel < n) ? 0 : X_EXEC;
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x_flag |= X_EMPTY; /* Syntax error if comd empty */
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}
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/* Check that '==' is present, syntax error if not */
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else if (NULL == (pp = _tcsstr (param, _T("=="))))
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{
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error_syntax (NULL);
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return 1;
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}
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else
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{
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/* Change first '='to space to terminate comparison loop */
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*pp = _T(' '); /* Need a space to terminate comparison loop */
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pp += 2; /* over '==' */
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while (_istspace (*pp)) /* Skip subsequent spaces */
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pp++;
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_tcscat (pp, _T(" ")); /* Add one space to ensure comparison ends */
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while (*param == *pp) /* Comparison loop */
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{
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if (_istspace (*param)) /* Terminates on space */
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break;
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param++, pp++;
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}
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if (x_flag ^= (*param != *pp) ? 0 : X_EXEC)
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{
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while (*pp && !_istspace (*pp)) /* Find first space, */
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pp++;
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x_flag |= X_EMPTY;
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}
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}
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if (x_flag & X_EMPTY)
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{
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while (_istspace (*pp)) /* Then skip spaces */
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pp++;
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if (*pp == _T('\0')) /* If nothing left then syntax err */
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{
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error_syntax (NULL);
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return 1;
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}
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}
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if (x_flag & X_EXEC)
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ParseCommandLine (pp);
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return 0;
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}
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