From a6550e791d376313aa8f68d6b65e48da75c3c09b Mon Sep 17 00:00:00 2001 From: Antonio Linares Date: Fri, 6 Jun 2003 07:35:20 +0000 Subject: [PATCH] Harbour implementation of Class(y) Class Symbol --- harbour/source/rtl/symbol.prg | 168 ++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 harbour/source/rtl/symbol.prg diff --git a/harbour/source/rtl/symbol.prg b/harbour/source/rtl/symbol.prg new file mode 100644 index 0000000000..327820de1e --- /dev/null +++ b/harbour/source/rtl/symbol.prg @@ -0,0 +1,168 @@ +/* + * $Id$ + */ + +/* + * Harbour Project source code: + * Harbour implementation of Class(y) Class Symbol + * + * Copyright 2003 Antonio Linares + * www - http://www.harbour-project.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, + * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/). + * + * As a special exception, the Harbour Project gives permission for + * additional uses of the text contained in its release of Harbour. + * + * The exception is that, if you link the Harbour libraries with other + * files to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the Harbour library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the Harbour + * Project under the name Harbour. If you copy code from other + * Harbour Project or Free Software Foundation releases into a copy of + * Harbour, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for Harbour, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + * + */ + +/* uncomment this section for a working sample + +// Class(y) Class Symbol documentation is located at: +// http://www.clipx.net/ng/classy/ngdebc.php + +function Main() + + local oSym := Symbol():New( "QOUT" ) + + ? "Now test the :Exec() method" + + oSym:Exec( "This string is being printed by QOUT" ) + oSym:Exec( "which is being invoked by the :Exec()" ) + oSym:Exec( "method in the Symbol class." ) + + ? + ? "symbol name: ", oSym:name + + ? "Comparing QOut symbol with xOut symbol" + ? oSym:IsEqual( Symbol():New( "xOut" ) ) + + ? "done!" + ? + +return nil */ + +#include "hbclass.ch" + +CLASS Symbol + + DATA nSym HIDDEN // internal pointer to the Symbols table symbol + + METHOD New( cSymName ) // Constructor. cSymName may already exists or not + + METHOD IsEqual( oSymbol ) // Compares two symbol objects + + METHOD exec() // Executes the function referred to by the Symbol object, + // with an optional parameters list + + METHOD _name( cName ) VIRTUAL // name simulates a read-only DATA so it + // can't be assigned + METHOD name() INLINE GetSymbolName( ::nSym ) // retrieves the symbol name + +ENDCLASS + +METHOD New( cSymName ) CLASS Symbol + + ::nSym = GetSymbolPointer( cSymName ) + +return Self + +METHOD IsEqual( oSymbol ) CLASS Symbol + + if ValType( oSymbol ) == "O" + return ::nSym == oSymbol:nSym + endif + +return .f. + +#pragma BEGINDUMP + +#include +#include + +static HB_FUNC( GETSYMBOLPOINTER ) +{ + hb_retnl( ( long ) hb_dynsymGet( hb_parc( 1 ) ) ); +} + +static HB_FUNC( GETSYMBOLNAME ) +{ + PHB_DYNS pDynSym = ( PHB_DYNS ) hb_parnl( 1 ); + + hb_retc( ( pDynSym != NULL ? pDynSym->pSymbol->szName : "" ) ); +} + +static HB_FUNC( SYMBOL_EXEC ) +{ + PHB_ITEM pSelf = hb_param( 0, HB_IT_OBJECT ); /* we retrieve Self */ + PHB_DYNS pSym; + + static PHB_DYNS pDynSym = NULL; /* We use a static value to look for the + symbol nSym just once */ + if( pDynSym == NULL ) + pDynSym = hb_dynsymFindName( "nSym" ); + + /* Lets retrieve DATA nSym from Self, + first we place the nSym symbol at the HVM stack */ + hb_vmPushSymbol( pDynSym->pSymbol ); + + /* we place the object at the HVM stack */ + hb_vmPush( pSelf ); + + /* we invoke the message with no parameters */ + hb_vmFunction( 0 ); + + pSym = ( PHB_DYNS ) hb_parnl( -1 ); /* we take the returned DATA value from + the HVM hb_stack.Return */ + if( pSym != NULL && pSym->pSymbol->pFunPtr ) + { + int i; + + hb_vmPushSymbol( pSym->pSymbol ); + hb_vmPushNil(); /* No Self. We are going to execute a function or a procedure */ + + for( i = 1; i <= hb_pcount(); i++ ) /* number of supplied params */ + /* pushes a generic item (supplied parameter) to the HVM */ + hb_vmPush( hb_param( i, HB_IT_ANY ) ); + + hb_vmFunction( hb_pcount() ); /* executes the symbol */ + } + else + hb_ret(); /* clean the HVM hb_stack.Return */ +} + +#pragma ENDDUMP