993 lines
27 KiB
C
993 lines
27 KiB
C
/*
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* $Id$
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*/
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/*
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* Classes.C contains the base-routines for OOPS system
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*
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* Copyright(C) 1999 by Antonio Linares.
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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
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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
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* License along with this program; if not, write to:
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*
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* The Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* You can contact me at: alinares@fivetech.com
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*
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*
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* Partial Copyright (C) 1999 Eddie Runia ( eddie@runia.com )
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* partial copyright regarding the following functions :
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* :CLASSSEL()
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* __clsDelMsg()
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* __clsModMsg()
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* __clsInstSuper()
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* __cls_CntClsData()
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* __cls_CntData()
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* __cls_DecData()
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* __cls_IncData()
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* __objClone()
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* __objHasMsg()
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* __objSendMsg()
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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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#include "ctoharb.h"
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#include "hboo.ch"
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typedef struct
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{
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void * pMessage; /* pointer to dynamic symbol when they get ready */
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PHB_FUNC pFunction;
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WORD wData;
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WORD wScope;
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PHB_ITEM pInitValue;
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} METHOD, * PMETHOD;
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typedef struct
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{
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char * szName;
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WORD wDatas;
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WORD wDataFirst; /* First wData from this class */
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PMETHOD pMethods;
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WORD wMethods;
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WORD wHashKey;
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PHB_ITEM pClassDatas; /* Array for ClassDatas */
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PHB_ITEM pInlines; /* Array for inline codeblocks */
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} CLASS, * PCLASS;
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#define BASE_METHODS 200
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#define BUCKET 4
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#define HASH_KEY ( BASE_METHODS / BUCKET )
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static PCLASS s_pClasses = NULL;
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static WORD s_wClasses = 0;
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static PMETHOD s_pMethod = NULL;
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static PHB_DYNS s_msgClassName = NULL;
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static PHB_DYNS s_msgClassH = NULL;
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static PHB_DYNS s_msgEval = NULL;
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static PHB_DYNS s_msgClassSel = NULL;
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/* All functions contained in classes.c */
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static void hb_clsDictRealloc( PCLASS pClass );
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static void hb_clsRelease( PCLASS );
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void hb_clsReleaseAll( void );
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char * hb_objGetClsName( PHB_ITEM pObject );
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PHB_FUNC hb_objGetMethod( PHB_ITEM, PHB_SYMB );
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ULONG hb_objHasMsg( PHB_ITEM pObject, char *szString );
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static HARBOUR hb___msgClsH( void );
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static HARBOUR hb___msgClsName( void );
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static HARBOUR hb___msgClsSel( void );
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static HARBOUR hb___msgSuper( void );
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static HARBOUR hb___msgEvalInline( void );
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static HARBOUR hb___msgVirtual( void );
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static HARBOUR hb___msgGetClsData( void );
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static HARBOUR hb___msgSetClsData( void );
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static HARBOUR hb___msgGetData( void );
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static HARBOUR hb___msgSetData( void );
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/*
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* __clsAddMsg( <hClass>, <cMessage>, <pFunction>, <nType>, [xInit] )
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*
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* Add a message to the class.
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*
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* <hClass> Class handle
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* <cMessage> Message
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* <pFunction> MET_METHOD : Pointer to function
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* MET_DATA : Index number in array
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* MET_CLASSDATA : Index number in array
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* MET_INLINE : Code block
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* MET_SUPER : Handle of super class
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* <nType> see MET_*
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* <xInit> Optional initializer for DATA
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*/
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HARBOUR HB___CLSADDMSG( void )
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{
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WORD wClass = hb_parnl( 1 );
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if( wClass && wClass <= s_wClasses )
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{
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PCLASS pClass = &s_pClasses[ wClass - 1 ];
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PHB_DYNS pMessage = hb_dynsymGet( hb_parc( 2 ) );
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WORD wType = hb_parni( 4 );
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WORD wAt = ( ( ( unsigned ) pMessage ) % pClass->wHashKey ) * BUCKET;
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WORD wMask = pClass->wHashKey * BUCKET;
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PMETHOD pNewMeth;
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if( wType == MET_INLINE && hb_param( 3, IT_BLOCK ) == NULL )
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{
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hb_errRT_BASE( EG_ARG, 3000, NULL, "__CLSADDMSG" );
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}
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if( pClass->wMethods > ( pClass->wHashKey * BUCKET * 2/3 ) )
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hb_clsDictRealloc( pClass );
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/* Find either the existing message or an open spot for a new message */
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while( pClass->pMethods[ wAt ].pMessage &&
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( pClass->pMethods[ wAt ].pMessage != pMessage ) )
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wAt = ( wAt == wMask ) ? 0 : wAt + 1;
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pNewMeth = pClass->pMethods + wAt;
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if( !pNewMeth->pMessage )
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{
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pNewMeth->pMessage = pMessage;
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pClass->wMethods++; /* One more message */
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}
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switch( wType )
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{
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case MET_METHOD:
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pNewMeth->pFunction = ( PHB_FUNC ) hb_parnl( 3 );
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break;
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case MET_DATA:
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pNewMeth->wData = hb_parnl( 3 );
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if( pMessage->pSymbol->szName[ 0 ] == '_' )
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pNewMeth->pFunction = hb___msgSetData;
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else
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{
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PHB_ITEM pInit = hb_param( 5, IT_ANY );
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pNewMeth->pFunction = hb___msgGetData;
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if( pInit && !IS_NIL( pInit )) /* Initializer found */
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{
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pNewMeth->pInitValue = hb_itemNew( NULL );
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hb_itemCopy( pNewMeth->pInitValue, pInit );
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}
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}
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break;
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case MET_CLASSDATA:
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pNewMeth->wData = hb_parnl( 3 );
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if( ( WORD ) hb_arrayLen( pClass->pClassDatas ) < hb_parnl( 3 ) )
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hb_arraySize( pClass->pClassDatas, hb_parnl( 3 ) );
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if( pMessage->pSymbol->szName[ 0 ] == '_' )
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pNewMeth->pFunction = hb___msgSetClsData;
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else
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pNewMeth->pFunction = hb___msgGetClsData;
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break;
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case MET_INLINE:
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pNewMeth->wData = hb_arrayLen( pClass->pInlines ) + 1;
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hb_arraySize( pClass->pInlines, pNewMeth->wData );
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hb_arraySet( pClass->pInlines, pNewMeth->wData,
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hb_param( 3, IT_BLOCK ) );
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pNewMeth->pFunction = hb___msgEvalInline;
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break;
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case MET_VIRTUAL:
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pNewMeth->pFunction = hb___msgVirtual;
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break;
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case MET_SUPER:
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pNewMeth->wData = hb_parnl( 3 );
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pNewMeth->pFunction = hb___msgSuper;
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break;
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default:
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hb_errInternal( 9999, "Invalid method type from __clsAddMsg", NULL, NULL );
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break;
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}
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}
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}
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/*
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* <hClass> := __clsNew( <cClassName>, <nDatas>, [hSuper] )
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*
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* Create a new class
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*
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* <cClassName> Name of the class
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* <nDatas> Number of DATAs in the class
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* <hSuper> Optional handle of superclass
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*/
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HARBOUR HB___CLSNEW( void )
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{
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WORD wSuper = hb_parni( 3 ); /* Super class present */
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PCLASS pNewCls;
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if( s_pClasses )
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s_pClasses = ( PCLASS ) hb_xrealloc( s_pClasses,
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sizeof( CLASS ) * ( s_wClasses + 1 ) );
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else
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s_pClasses = ( PCLASS ) hb_xgrab( sizeof( CLASS ) );
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pNewCls = s_pClasses + s_wClasses;
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pNewCls->szName = ( char * ) hb_xgrab( hb_parclen( 1 ) + 1 );
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strcpy( pNewCls->szName, hb_parc( 1 ) );
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if( wSuper )
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{
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PCLASS pSprCls = s_pClasses + wSuper - 1;
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WORD wSize;
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pNewCls->wDataFirst = pSprCls->wDatas;
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pNewCls->wDatas = pSprCls->wDatas + hb_parni( 2 );
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pNewCls->wMethods = pSprCls->wMethods;
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pNewCls->pClassDatas = hb_arrayClone( pSprCls->pClassDatas );
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pNewCls->pInlines = hb_arrayClone( pSprCls->pInlines );
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pNewCls->wHashKey = pSprCls->wHashKey;
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wSize = pSprCls->wHashKey * BUCKET * sizeof( METHOD );
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pNewCls->pMethods = ( PMETHOD ) hb_xgrab( wSize );
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memcpy( pNewCls->pMethods, pSprCls->pMethods, wSize );
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} /* Copy all super methods */
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else
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{
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pNewCls->wDatas = hb_parni( 2 );
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pNewCls->wDataFirst = 0;
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pNewCls->pMethods = ( PMETHOD ) hb_xgrab( BASE_METHODS * sizeof( METHOD ) );
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pNewCls->wMethods = 0;
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pNewCls->wHashKey = HASH_KEY; /* BUCKET = 4 repetitions */
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pNewCls->pClassDatas = hb_itemArrayNew( 0 );
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pNewCls->pInlines = hb_itemArrayNew( 0 );
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memset( pNewCls->pMethods, 0, BASE_METHODS * sizeof( METHOD ) );
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}
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hb_retni( ++s_wClasses );
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}
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/*
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* __clsDelMsg( <oObj>, <cMessage> )
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*
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* Delete message (only for INLINE and METHOD)
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*
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* <oObj> Object
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* <cMessage> Message
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*/
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HARBOUR HB___CLSDELMSG( void )
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{
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WORD wClass = hb_parni( 1 );
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PHB_ITEM pString = hb_param( 2, IT_STRING );
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if( wClass && wClass <= s_wClasses && pString )
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{
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PCLASS pClass = s_pClasses + wClass - 1;
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PHB_SYMB pMessage = hb_dynsymGet( pString->item.asString.value )->pSymbol;
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PHB_DYNS pMsg = pMessage->pDynSym;
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WORD wAt = ( ( ( unsigned ) pMsg ) % pClass->wHashKey ) * BUCKET;
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WORD wMask = pClass->wHashKey * BUCKET;
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WORD wLimit = wAt ? ( wAt - 1 ) : ( wMask - 1 );
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while( ( wAt != wLimit ) &&
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( pClass->pMethods[ wAt ].pMessage &&
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( pClass->pMethods[ wAt ].pMessage != pMsg ) ) )
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{
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wAt++;
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if( wAt == wMask )
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wAt = 0;
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}
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if( wAt != wLimit )
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{ /* Requested method found */
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PHB_FUNC pFunc = pClass->pMethods[ wAt ].pFunction;
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if( pFunc == hb___msgEvalInline ) /* INLINE method deleted */
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{
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hb_arrayDel( pClass->pInlines, pClass->pMethods[ wAt ].wData );
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/* Delete INLINE block */
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}
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/* Move messages */
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while( pClass->pMethods[ wAt ].pMessage && wAt != wLimit )
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{
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memcpy( pClass->pMethods + wAt,
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pClass->pMethods + ( ( wAt == wMask ) ? 0 : wAt + 1 ),
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sizeof( METHOD ) );
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wAt++;
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if( wAt == wMask )
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wAt = 0;
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}
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memset( pClass->pMethods + wAt, 0, sizeof( METHOD ) );
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pClass->wMethods--; /* Decrease number messages */
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}
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}
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}
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/*
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* <hClass> := <obj>:ClassH()
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*
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* Returns class handle of <obj>
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*/
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static HARBOUR hb___msgClsH( void )
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{
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hb_retni( ( stack.pBase + 1 )->item.asArray.value->wClass );
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}
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/*
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* <oNewObject> := __clsInst( <hClass> )
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*
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* Create a new object from class definition <hClass>
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*/
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HARBOUR HB___CLSINST( void )
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{
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WORD wClass = hb_parni( 1 );
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if( wClass <= s_wClasses )
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{
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PCLASS pClass = s_pClasses + ( wClass - 1 );
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WORD wAt;
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WORD wLimit = pClass->wHashKey * BUCKET;
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PMETHOD pMeth = pClass->pMethods; /* Initialize DATA */
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hb_arrayNew( &stack.Return, pClass->wDatas );
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stack.Return.item.asArray.value->wClass = wClass;
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for( wAt = 0; wAt < wLimit; wAt++, pMeth++ )
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if( pMeth->pInitValue )
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hb_itemArrayPut( &stack.Return, pMeth->wData, pMeth->pInitValue );
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}
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}
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/*
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* __clsModMsg( <oObj>, <cMessage>, <pFunc> )
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*
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* Modify message (only for INLINE and METHOD)
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*/
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HARBOUR HB___CLSMODMSG( void )
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{
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WORD wClass = hb_parni( 1 );
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PHB_ITEM pString = hb_param( 2, IT_STRING );
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if( wClass && wClass <= s_wClasses && pString )
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{
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PCLASS pClass = s_pClasses + wClass - 1;
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PHB_SYMB pMessage = hb_dynsymGet( pString->item.asString.value )->pSymbol;
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PHB_DYNS pMsg = pMessage->pDynSym;
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WORD wAt = ( ( ( unsigned ) pMsg ) % pClass->wHashKey ) * BUCKET;
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WORD wMask = pClass->wHashKey * BUCKET;
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WORD wLimit = wAt ? ( wAt - 1 ) : ( wMask - 1 );
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while( ( wAt != wLimit ) &&
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( pClass->pMethods[ wAt ].pMessage &&
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( pClass->pMethods[ wAt ].pMessage != pMsg ) ) )
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{
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wAt++;
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if( wAt == wMask )
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wAt = 0;
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}
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if( wAt != wLimit )
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{ /* Requested method found */
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PHB_FUNC pFunc = pClass->pMethods[ wAt ].pFunction;
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if( pFunc == hb___msgEvalInline ) /* INLINE method changed */
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{
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PHB_ITEM pBlock = hb_param( 3, IT_BLOCK );
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if( pBlock == NULL )
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hb_errRT_BASE( EG_ARG, 3000, NULL, "__CLSMODMSG" );
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else
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hb_arraySet( pClass->pInlines, pClass->pMethods[ wAt ].wData, pBlock );
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}
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else if( ( pFunc == hb___msgSetData ) || ( pFunc == hb___msgGetData ) )
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{ /* Not allowed for DATA */
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hb_errRT_BASE( EG_ARG, 3004, "Cannot modify a DATA item", "__CLSMODMSG" );
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}
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else /* Modify METHOD */
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pClass->pMethods[ wAt ].pFunction = ( PHB_FUNC ) hb_parnl( 3 );
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}
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}
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}
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/*
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* <cClassName> := <obj>:ClassName()
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*
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* Return class name of <obj>. Can also be used for all types.
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*/
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static HARBOUR hb___msgClsName( void )
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{
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PHB_ITEM pItemRef;
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if( IS_BYREF( stack.pBase + 1 ) ) /* Variables by reference */
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pItemRef = hb_itemUnRef( stack.pBase + 1 );
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else
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pItemRef = stack.pBase + 1;
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hb_retc( hb_objGetClsName( pItemRef ) );
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}
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/*
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* <cClassName> := ClassName( <hClass> )
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*
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* Returns class name of <hClass>
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*/
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HARBOUR HB___OBJGETCLSNAME( void )
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{
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PHB_ITEM pObject = hb_param( 0, IT_OBJECT );
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WORD wClass;
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if( pObject && pObject->item.asArray.value->wClass )
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{
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wClass = pObject->item.asArray.value->wClass;
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hb_retc( s_pClasses[ wClass - 1 ].szName );
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}
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else
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{
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wClass = hb_parni( 1 );
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if( wClass <= s_wClasses )
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hb_retc( s_pClasses[ wClass - 1 ].szName );
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else
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hb_retc( "" );
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}
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}
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/*
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* <aMessages> := <obj>:ClassSel()
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*
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* Returns all the messages in <obj>
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*/
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static HARBOUR hb___msgClsSel( void )
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{
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WORD wClass = IS_ARRAY( stack.pBase + 1 ) ?
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( stack.pBase + 1 )->item.asArray.value->wClass : 0;
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/* Get class word */
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PHB_ITEM pReturn = hb_itemNew( NULL );
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if( ( ! wClass ) && IS_BYREF( stack.pBase + 1 ) )
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{ /* Variables by reference */
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PHB_ITEM pItemRef = hb_itemUnRef( stack.pBase + 1 );
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if( IS_ARRAY( pItemRef ) )
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wClass = pItemRef->item.asArray.value->wClass;
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}
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if( wClass && wClass <= s_wClasses )
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{
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PCLASS pClass = &s_pClasses[ wClass - 1 ];
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WORD wLimit = pClass->wHashKey * BUCKET; /* Number of Hash keys */
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WORD wPos = 0;
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WORD wAt;
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hb_itemRelease( pReturn );
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pReturn = hb_itemArrayNew( pClass->wMethods );
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/* Create a transfer array */
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for( wAt = 0; wAt < wLimit ; wAt++ )
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{
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PHB_DYNS pMessage = ( PHB_DYNS ) pClass->pMethods[ wAt ].pMessage;
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if( pMessage ) /* Hash Entry used ? */
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{
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|
PHB_ITEM pItem = hb_itemPutC( NULL, pMessage->pSymbol->szName );
|
|
/* Add to array */
|
|
hb_itemArrayPut( pReturn, ++wPos, pItem );
|
|
hb_itemRelease( pItem );
|
|
}
|
|
}
|
|
}
|
|
hb_itemReturn( pReturn );
|
|
hb_itemRelease( pReturn );
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_clsDictRealloc( PCLASS )
|
|
*
|
|
* Realloc (widen) class
|
|
*/
|
|
static void hb_clsDictRealloc( PCLASS pClass )
|
|
{
|
|
/* TODO: Implement it for very large classes */
|
|
if( pClass )
|
|
hb_errInternal( 9999, "classes.c hb_clsDictRealloc() not implemented yet", NULL, NULL );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgEvalInline()
|
|
*
|
|
* Internal function executed for inline methods
|
|
*/
|
|
static HARBOUR hb___msgEvalInline( void )
|
|
{
|
|
HB_ITEM block;
|
|
WORD wClass = ( stack.pBase + 1 )->item.asArray.value->wClass;
|
|
WORD w;
|
|
|
|
hb_arrayGet( s_pClasses[ wClass - 1 ].pInlines, s_pMethod->wData, &block );
|
|
|
|
hb_vmPushSymbol( &symEval );
|
|
hb_vmPush( &block );
|
|
hb_vmPush( stack.pBase + 1 ); /* Push self */
|
|
for( w = 1; w <= hb_pcount(); w++ )
|
|
hb_vmPush( hb_param( w, IT_ANY ) );
|
|
hb_vmDo( hb_pcount() + 1 ); /* Self is also an argument */
|
|
|
|
hb_itemClear( &block ); /* Release block */
|
|
}
|
|
|
|
|
|
/*
|
|
* <szName> = hb_objGetClsName( pObject )
|
|
*
|
|
* Get the class name of an object
|
|
*
|
|
*/
|
|
char * hb_objGetClsName( PHB_ITEM pObject )
|
|
{
|
|
char * szClassName;
|
|
|
|
if( IS_ARRAY( pObject ) )
|
|
{
|
|
if( ! pObject->item.asArray.value->wClass )
|
|
szClassName = "ARRAY";
|
|
else
|
|
szClassName =
|
|
( s_pClasses + pObject->item.asArray.value->wClass - 1 )->szName;
|
|
}
|
|
else /* built in types */
|
|
{
|
|
switch( pObject->type )
|
|
{
|
|
case IT_NIL:
|
|
szClassName = "NIL";
|
|
break;
|
|
|
|
case IT_STRING:
|
|
szClassName = "CHARACTER";
|
|
break;
|
|
|
|
case IT_BLOCK:
|
|
szClassName = "BLOCK";
|
|
break;
|
|
|
|
case IT_SYMBOL:
|
|
szClassName = "SYMBOL";
|
|
break;
|
|
|
|
case IT_DATE:
|
|
szClassName = "DATE";
|
|
break;
|
|
|
|
case IT_INTEGER:
|
|
case IT_LONG:
|
|
case IT_DOUBLE:
|
|
szClassName = "NUMERIC";
|
|
break;
|
|
|
|
case IT_LOGICAL:
|
|
szClassName = "LOGICAL";
|
|
break;
|
|
|
|
default:
|
|
szClassName = "UNKNOWN";
|
|
break;
|
|
}
|
|
}
|
|
return szClassName;
|
|
}
|
|
|
|
/*
|
|
* __msgGetClsData()
|
|
*
|
|
* Internal function to return a CLASSDATA
|
|
*/
|
|
static HARBOUR hb___msgGetClsData( void )
|
|
{
|
|
WORD wClass = ( stack.pBase + 1 )->item.asArray.value->wClass;
|
|
WORD wIndex = s_pMethod->wData;
|
|
|
|
if( wClass && wClass <= s_wClasses )
|
|
hb_arrayGet( s_pClasses[ wClass - 1 ].pClassDatas, wIndex, &stack.Return );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgGetData()
|
|
*
|
|
* Internal function to return a DATA
|
|
*/
|
|
static HARBOUR hb___msgGetData( void )
|
|
{
|
|
PHB_ITEM pObject = stack.pBase + 1;
|
|
WORD wIndex = s_pMethod->wData;
|
|
|
|
if( wIndex > ( WORD ) hb_arrayLen ( pObject ) )
|
|
/* Resize needed */
|
|
hb_arraySize( pObject, wIndex ); /* Make large enough */
|
|
|
|
hb_arrayGet( pObject, wIndex, &stack.Return );
|
|
}
|
|
|
|
|
|
/*
|
|
* <pFunc> = hb_objGetMethod( <pObject>, <pMessage> )
|
|
*
|
|
* Internal function to the function pointer of a message of an object
|
|
*/
|
|
PHB_FUNC hb_objGetMethod( PHB_ITEM pObject, PHB_SYMB pMessage )
|
|
{
|
|
WORD wClass;
|
|
PHB_DYNS pMsg = pMessage->pDynSym;
|
|
|
|
if( pObject->type == IT_OBJECT )
|
|
wClass = pObject->item.asArray.value->wClass;
|
|
else
|
|
wClass = 0;
|
|
|
|
if( ! s_msgClassName )
|
|
{
|
|
s_msgClassName = hb_dynsymGet( "CLASSNAME" ); /* Standard messages */
|
|
s_msgClassH = hb_dynsymGet( "CLASSH" ); /* Not present in classdef. */
|
|
s_msgClassSel = hb_dynsymGet( "CLASSSEL" );
|
|
s_msgEval = hb_dynsymGet( "EVAL" );
|
|
}
|
|
|
|
if( wClass && wClass <= s_wClasses )
|
|
{
|
|
PCLASS pClass = &s_pClasses[ wClass - 1 ];
|
|
WORD wAt = ( ( ( unsigned ) pMsg ) % pClass->wHashKey ) * BUCKET;
|
|
WORD wMask = pClass->wHashKey * BUCKET;
|
|
WORD wLimit = wAt ? ( wAt - 1 ) : ( wMask - 1 );
|
|
|
|
s_pMethod = NULL; /* Current method pointer */
|
|
|
|
while( wAt != wLimit )
|
|
{
|
|
if( pClass->pMethods[ wAt ].pMessage == pMsg )
|
|
{
|
|
s_pMethod = pClass->pMethods + wAt;
|
|
return s_pMethod->pFunction;
|
|
}
|
|
wAt++;
|
|
if( wAt == wMask )
|
|
wAt = 0;
|
|
}
|
|
}
|
|
|
|
if( pMsg == s_msgClassName )
|
|
return hb___msgClsName;
|
|
|
|
else if( pMsg == s_msgClassH )
|
|
return hb___msgClsH;
|
|
|
|
else if( pMsg == s_msgClassSel )
|
|
return hb___msgClsSel;
|
|
|
|
else if( pMsg == s_msgEval )
|
|
return hb___msgEvalInline;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* <uPtr> = hb_objHasMsg( <pObject>, <szString> )
|
|
*
|
|
* Check whether <szString> is an existing message for object.
|
|
*
|
|
* <uPtr> should be read as a boolean
|
|
*/
|
|
ULONG hb_objHasMsg( PHB_ITEM pObject, char *szString )
|
|
{
|
|
PHB_SYMB pMessage = hb_dynsymGet( szString )->pSymbol;
|
|
return ( ULONG ) hb_objGetMethod( pObject, pMessage );
|
|
} /* Get funcptr of message */
|
|
|
|
|
|
/*
|
|
* <lRet> := __objHasMsg( <oObj>, <cSymbol> )
|
|
*
|
|
* Is <cSymbol> a valid message for the <oObj>
|
|
*/
|
|
HARBOUR HB___OBJHASMSG( void )
|
|
{
|
|
PHB_ITEM pObject = hb_param( 1, IT_OBJECT );
|
|
PHB_ITEM pString = hb_param( 2, IT_STRING );
|
|
|
|
if( pObject && pString )
|
|
hb_retl( hb_objHasMsg( pObject, pString->item.asString.value ) != 0 );
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3000, NULL, "__OBJHASMSG" );
|
|
}
|
|
|
|
|
|
/*
|
|
* <oNew> := __objClone( <oOld> )
|
|
*
|
|
* Clone an object. Note the similarity with aClone ;-)
|
|
*/
|
|
HARBOUR HB___OBJCLONE( void )
|
|
{
|
|
PHB_ITEM pSrcObject = hb_param( 1, IT_OBJECT );
|
|
|
|
if( pSrcObject )
|
|
{
|
|
PHB_ITEM pDstObject = hb_arrayClone( pSrcObject );
|
|
|
|
hb_itemCopy( &stack.Return, pDstObject );
|
|
hb_itemRelease( pDstObject );
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3001, NULL, "__OBJCLONE" );
|
|
}
|
|
|
|
|
|
/*
|
|
* <xRet> = __objSendMsg( <oObj>, <cSymbol>, <xArg,..>
|
|
*
|
|
* Send a message to an object
|
|
*/
|
|
HARBOUR HB___OBJSENDMSG( void )
|
|
{
|
|
PHB_ITEM pObject = hb_param( 1, IT_OBJECT );
|
|
PHB_ITEM pMessage = hb_param( 2, IT_STRING );
|
|
|
|
if( pMessage && pObject ) /* Object & message passed */
|
|
{
|
|
WORD w;
|
|
|
|
hb_vmPush( pObject ); /* Push object */
|
|
hb_vmMessage( hb_dynsymGet( pMessage->item.asString.value )->pSymbol );
|
|
/* Push char symbol as message */
|
|
for( w = 3; w <= hb_pcount(); w++ ) /* Push arguments on stack */
|
|
hb_vmPush( hb_param( w, IT_ANY ) );
|
|
hb_vmDo( hb_pcount()-2 ); /* Execute message */
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3000, NULL, "__OBJSENDMSG" );
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_clsRelease( <pClass> )
|
|
*
|
|
* Release a class from memory
|
|
*/
|
|
static void hb_clsRelease( PCLASS pClass )
|
|
{
|
|
WORD wAt;
|
|
WORD wLimit = pClass->wHashKey * BUCKET;
|
|
PMETHOD pMeth = pClass->pMethods;
|
|
|
|
for( wAt = 0; wAt < wLimit; wAt++, pMeth++ ) /* Release initializers */
|
|
if( pMeth->pInitValue && pMeth->wData > pClass->wDataFirst )
|
|
hb_itemRelease( pMeth->pInitValue );
|
|
|
|
hb_xfree( pClass->szName );
|
|
hb_xfree( pClass->pMethods );
|
|
|
|
hb_itemRelease( pClass->pClassDatas );
|
|
hb_itemRelease( pClass->pInlines );
|
|
}
|
|
|
|
|
|
/*
|
|
* hb_clsReleaseAll()
|
|
*
|
|
* Release all classes
|
|
*/
|
|
void hb_clsReleaseAll( void )
|
|
{
|
|
WORD w;
|
|
|
|
for( w = 0; w < s_wClasses; w++ )
|
|
hb_clsRelease( s_pClasses + w );
|
|
|
|
if( s_pClasses )
|
|
hb_xfree( s_pClasses );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgSuper()
|
|
*
|
|
* Internal function to cast to a super method
|
|
*/
|
|
static HARBOUR hb___msgSuper( void )
|
|
{
|
|
PHB_ITEM pObject = stack.pBase + 1;
|
|
PHB_ITEM pSuper = ( PHB_ITEM ) hb_xgrab( sizeof( HB_ITEM ) );
|
|
PBASEARRAY pNewBase = ( PBASEARRAY ) hb_xgrab( sizeof( BASEARRAY ) );
|
|
WORD wSuperCls = s_pMethod->wData; /* Get handle of superclass */
|
|
|
|
memcpy( pSuper, pObject, sizeof( HB_ITEM ) );
|
|
/* Allocate new structures */
|
|
memcpy( pNewBase, pObject->item.asArray.value, sizeof( BASEARRAY ) );
|
|
|
|
pSuper->item.asArray.value = pNewBase;
|
|
|
|
pNewBase->wClass = wSuperCls;
|
|
pNewBase->wHolders = 1; /* New item is returned */
|
|
pNewBase->bSuperCast = TRUE; /* Do not dispose pItems !! */
|
|
/* A bit dirty, but KISS. */
|
|
hb_itemCopy( &stack.Return, pSuper );
|
|
hb_itemRelease( pSuper );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgSetClsData()
|
|
*
|
|
* Internal function to set a CLASSDATA
|
|
*/
|
|
static HARBOUR hb___msgSetClsData( void )
|
|
{
|
|
WORD wClass = ( stack.pBase + 1 )->item.asArray.value->wClass;
|
|
PHB_ITEM pReturn = stack.pBase + 2;
|
|
|
|
if( wClass && wClass <= s_wClasses )
|
|
{
|
|
hb_arraySet( s_pClasses[ wClass - 1 ].pClassDatas,
|
|
s_pMethod->wData, pReturn );
|
|
hb_itemCopy( &stack.Return, pReturn );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgSetData()
|
|
*
|
|
* Internal function to set a DATA
|
|
*/
|
|
static HARBOUR hb___msgSetData( void )
|
|
{
|
|
PHB_ITEM pObject = stack.pBase + 1;
|
|
PHB_ITEM pReturn = stack.pBase + 2;
|
|
WORD wIndex = s_pMethod->wData;
|
|
|
|
if( wIndex > ( WORD ) hb_arrayLen( pObject ) )
|
|
/* Resize needed */
|
|
hb_arraySize( pObject, wIndex ); /* Make large enough */
|
|
hb_arraySet( pObject, wIndex, pReturn );
|
|
hb_itemCopy( &stack.Return, pReturn );
|
|
}
|
|
|
|
|
|
/* No comment :-) */
|
|
static HARBOUR hb___msgVirtual( void )
|
|
{
|
|
hb_ret();
|
|
}
|
|
|
|
|
|
/*
|
|
* <hClass> := __clsInstSuper( <cName> )
|
|
*
|
|
* Instance super class and return class handle
|
|
*/
|
|
HARBOUR HB___CLSINSTSUPER( void )
|
|
{
|
|
PHB_ITEM pString = hb_param( 1, IT_STRING );
|
|
BOOL bFound = FALSE;
|
|
|
|
if( pString )
|
|
{
|
|
PHB_DYNS pDynSym = hb_dynsymFind( pString->item.asString.value );
|
|
|
|
if( pDynSym ) /* Find function */
|
|
{
|
|
WORD w;
|
|
|
|
hb_vmPushSymbol( pDynSym->pSymbol ); /* Push function name */
|
|
hb_vmPushNil();
|
|
hb_vmFunction( 0 ); /* Execute super class */
|
|
|
|
if( !IS_OBJECT( &stack.Return ) )
|
|
{
|
|
hb_errRT_BASE( EG_ARG, 3002, "Super class does not return an object", "__CLSINSTSUPER" );
|
|
}
|
|
|
|
for( w = 0; !bFound && w < s_wClasses; w++ )
|
|
{ /* Locate the entry */
|
|
if( !hb_stricmp( pString->item.asString.value, s_pClasses[ w ].szName ) )
|
|
{
|
|
hb_retni( w + 1 ); /* Entry + 1 = hb___msgClsH */
|
|
bFound = TRUE;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3003, "Cannot find super class", "__CLSINSTSUPER" );
|
|
}
|
|
if( !bFound )
|
|
hb_retni( 0 );
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_CntClsData( <hClass> )
|
|
*
|
|
* Return number of class datas
|
|
*/
|
|
HARBOUR HB___CLS_CNTCLSDATA( void )
|
|
{
|
|
WORD wClass = hb_parnl( 1 );
|
|
|
|
if( wClass )
|
|
{
|
|
PCLASS pClass = &s_pClasses[ wClass - 1 ];
|
|
hb_retni( hb_arrayLen( pClass->pClassDatas ) );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* <nSeq> = __cls_CntData( <hClass> )
|
|
*
|
|
* Return number of datas
|
|
*/
|
|
HARBOUR HB___CLS_CNTDATA( void )
|
|
{
|
|
WORD wClass = hb_parnl( 1 );
|
|
|
|
if( wClass )
|
|
hb_retni( s_pClasses[ wClass - 1 ].wDatas );
|
|
}
|
|
|
|
/*
|
|
* <nSeq> = __cls_DecData( <hClass> )
|
|
*
|
|
* Return number of datas and decrease
|
|
*/
|
|
HARBOUR HB___CLS_DECDATA( void )
|
|
{
|
|
WORD wClass = hb_parnl( 1 );
|
|
|
|
if( wClass )
|
|
hb_retni( s_pClasses[ wClass - 1 ].wDatas-- );
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_IncData( <hClass> )
|
|
*
|
|
* Return number of datas and decrease
|
|
*/
|
|
HARBOUR HB___CLS_INCDATA( void )
|
|
{
|
|
WORD wClass = hb_parnl( 1 );
|
|
|
|
if( wClass )
|
|
hb_retni( ++s_pClasses[ wClass - 1 ].wDatas );
|
|
}
|
|
|