b5d578680c
* include/hbapi.h
* source/vm/extend.c
+ Added hb_retc_null() which is equivalent to
hb_retc( NULL ) and will return an empty string.
I opted for this because hb_retc( NULL ) usage is not
compatible with CA-Cl*pper _retc(), so it might create
problems when writing C code intended for both Clipper
and Harbour.
* contrib/hbclipsm/stack.c
* contrib/hbclipsm/environ.c
* contrib/hbclipsm/status.c
* contrib/hbclipsm/gauge.c
% Optimizations.
; TOFIX: GAUGE*() still leaks and doesn't seem to function.
* contrib/rddads/adsmgmnt.c
% Optimizations (using hb_arraySet*()).
! Fixed typo in ADSMGGETOPENTABLES2().
109 lines
3.2 KiB
C
109 lines
3.2 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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* Stack structure
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*
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* Copyright 2000 Jose Lalin <dezac@corevia.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, or (at your option)
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* any later version.
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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 software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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#include "hbapi.h"
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#include "hbapiitm.h"
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/* StackNew() --> <aStack>
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*/
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HB_FUNC( STACKNEW )
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{
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hb_itemReturnRelease( hb_itemArrayNew( 0 ) ); /* Create array */
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}
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/* StackPush( <aStack>, <xValue> ) --> <aStack>
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*/
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HB_FUNC( STACKPUSH )
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{
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hb_arrayAdd( hb_param( 1, HB_IT_ARRAY ),
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hb_param( 2, HB_IT_ANY ) );
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}
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/* StackPop( <aStack> ) --> <xValue>
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Returns NIL if the stack is empty
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*/
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HB_FUNC( STACKPOP )
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{
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PHB_ITEM pArray = hb_param( 1, HB_IT_ARRAY );
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long ulLen = hb_arrayLen( pArray );
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PHB_ITEM pLast = hb_itemNew( NULL );
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if( ulLen )
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{
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hb_arrayLast( pArray, pLast );
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hb_arrayDel( pArray, ulLen );
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--ulLen;
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hb_arraySize( pArray, HB_MAX( ulLen, 0 ) );
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}
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hb_itemReturnRelease( pLast );
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}
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/* StackIsEmpty( <aStack> ) --> <lEmpty>
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*/
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HB_FUNC( STACKISEMPTY )
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{
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hb_retl( hb_arrayLen( hb_param( 1, HB_IT_ARRAY ) ) == 0 );
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}
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/* StackTop( <aStack> ) --> <xValue>
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Returns the top item
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*/
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HB_FUNC( STACKTOP )
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{
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PHB_ITEM pLast = hb_itemNew( NULL );
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hb_arrayLast( hb_param( 1, HB_IT_ARRAY ), pLast );
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hb_itemReturnRelease( pLast );
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}
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