84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* HB_PVALUE() function
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*
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* Copyright 1999 Eddie Runia <eddie@runia.com>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#include "extend.h"
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#include "errorapi.h"
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#include "itemapi.h"
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/* $DOC$
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* $FUNCNAME$
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* HB_PVALUE()
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* $CATEGORY$
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* Parameter Checks
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* $ONELINER$
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* Retrieves the value of an argument.
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* $SYNTAX$
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* HB_PVALUE( <nArg> ) --> <xExp>
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* $ARGUMENTS$
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* A number that indicates the argument to check.
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* $RETURNS$
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* Returns the value stored by an argument.
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* $DESCRIPTION$
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* This function is useful to check the value stored in an argument.
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* $EXAMPLES$
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* See Test
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* $TESTS$
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* function Test( nValue, cString )
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* if PCount() == 2
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* ? hb_PValue( 1 ), nValue
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* ? hb_PValue( 2 ), cString
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* endif
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* return nil
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* $STATUS$
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* R
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* $COMPLIANCE$
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* HB_PVALUE() is a new function and hence not CA-Clipper compliant.
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* $SEEALSO$
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* PCOUNT()
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* $END$
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*/
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HARBOUR HB_HB_PVALUE( void )
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{
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USHORT uiParam = hb_parni( 1 );
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PHB_ITEM pBase = hb_stack.pItems + hb_stack.pBase->item.asSymbol.stackbase; /* Skip function + self */
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if( uiParam && uiParam <= pBase->item.asSymbol.paramcnt ) /* Valid number */
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hb_itemReturn( pBase + 1 + uiParam );
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else
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hb_errRT_BASE( EG_ARG, 3011, NULL, "HB_PVALUE" );
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}
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