89 lines
2.6 KiB
Plaintext
89 lines
2.6 KiB
Plaintext
/*
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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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* MEMVARBLOCK() function
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*
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* Copyright 1999 Ryszard Glab <rglab@imid.med.pl>
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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 "hbmemvar.ch"
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#include "common.ch"
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/* $DOC$
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* $FUNCNAME$
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* MEMVARBLOCK
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* $CATEGORY$
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* variables management
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* $ONELINER$
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* Returns a codeblock that sets/gets a value of memvar variable
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* $SYNTAX$
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* MEMVARBLOCK( <cMemvarName> )
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* $ARGUMENTS$
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* <cMemvarName> - a string that contains the name of variable
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* $RETURNS$
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* a codeblock that sets/get the value of variable
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* $DESCRIPTION$
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* This function returns a codeblock that sets/gets the value of
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* PRIVATE or PUBLIC variable. When this codeblock is evaluated
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* without any parameters passed then it returns the current value
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* of given variable. If the second parameter is passed for
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* the codeblock evaluation then its value is used to set the new
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* value of given variable - the passed value is also returned
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* as a value of the codeblock evaluation.
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* $EXAMPLES$
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* PROCEDURE MAIN()
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* LOCAL cbSetGet
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* PUBLIC xPublic
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*
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* cbSetGet = MEMVARBLOCK( "xPublic" )
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* EVAL( cbSetGet, "new value" )
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* ? "Value of xPublic variable", EVAL( cbSetGet )
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*
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* RETURN
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* $TESTS$
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*
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* $STATUS$
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*
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* $COMPLIANCE$
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*
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* $SEEALSO$
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* __MVGET, __MVPUT
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* $END$
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*/
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FUNCTION MEMVARBLOCK( cMemvar )
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IF ISCHARACTER( cMemvar ) .AND. __mvSCOPE( cMemvar ) > HB_MV_ERROR
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RETURN {| x | iif( x == NIL, __mvGET( cMemvar ), __mvPUT( cMemvar, x ) ) }
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ENDIF
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RETURN NIL
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