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harbour-core/harbour/source/rtl/tobject.prg
Przemyslaw Czerpak 43d20b8eb6 2006-09-10 13:05 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl) 
* harbour/include/hbapi.h
  * harbour/source/vm/hvm.c
  * harbour/source/vm/codebloc.c
  * harbour/source/vm/arrays.c
    * moved static base offset from hb_struBlock structure
      to HB_CODEBLOCK structure
    + added hclass member to hb_struBlock - it will be used in
      the future for checking codeblock scope in classy so we will
      real scope checking also for messages sent from codeblocks.
    - removed supercast and superoffset members from hb_struArray
      structure.

  * harbour/include/hbclass.ch
    * added class(y) like
         @:<MessageName>([<MsgParams,...>])
      send operator. It's not exactly the same as in class(y) where
      this operator is hardcoded to executing function directly,
      needs method name instead of message name and is linked statically.
      In Harbour this operator uses message name so can be used also for
      instance variables and make dynamic casting to the class from which
      current method is inherited. In short words sending messages to @:
      instead of :: causes that they work like non-virtual messages in
      C++ mode.
      If you do not use the same method body in different classes
      then you can also use explicitly self casting:
         ::<myclass>:<msgname>[(...)]
      and it will be a little bit faster

  * harbour/include/hboo.ch
    + added: HB_OO_MSG_ASSIGN, HB_OO_MSG_ACCESS,
             HB_OO_MSG_CLSASSIGN, HB_OO_MSG_CLSACCESS
      They should be used insted of HB_OO_MSG_DATA and HB_OO_MSG_CLSDATA
      This resolves problems with name conflicts when we were detecting
      type of message (ACCESS/ASSIGN) by checking the first character
      in message name. F.e. now it's possible to create exported instance
      variable called __WithObject and it will be used in all WITH OBJECT
      statement instead of the base object value. It's simple and effective
      WITH OBJECT overloading.
      I kept backward compatibility for HB_OO_MSG_DATA and HB_OO_MSG_CLSDATA
      but I strongly suggest to update code to use new constants.
    + added HB_OO_MSG_REALCLASS

  * harbour/source/rtl/objfunc.prg
  * harbour/source/rtl/tobject.prg
  * harbour/source/rtl/tclass.prg
    * use HB_OO_MSG_[CLS]{ASSIGN,ACCESS} instead of HB_OO_MSG_[CLS]DATA

  * harbour/source/rtl/tclass.prg
    + added REALCLASS message to creted classes - it's used for @: operator

  * harbour/source/vm/classes.c
    * updated for above modifications
    * calculate instance area offset in supercasting dynamically - it
      will allow to eliminate multiple instance area allocating when
      in the inheritance tree the same class exists more then once and
      also quite easy add support for non-virtual messages.
    ! fixed GPF in __CLSINSTSUPER() class function generate HVM exception
    % do not inherit unaccessible inline blocks
    * some other minor optimization, fixes and code cleanups

  * harbour/source/rdd/usrrdd/usrrdd.c
    ! fixed HB_TRACE message

  * harbour/source/rtl/errorapi.c
    ! generate internal error if ErrorNew() function does not return an object
2006-09-10 11:16:43 +00:00

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/*
* $Id$
*/
/*
* Harbour Project source code:
* Base Object from wich all object finally inherit
*
* Copyright 2000 JfL&RaC <jfl@mafact.com>, <rac@mafact.com>
* 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.
*
*/
/*
* The following parts are Copyright of the individual authors.
* www - http://www.harbour-project.org
*
* Copyright 2000 J. Lefebvre <jfl@mafact.com> & RA. Cuylen <rac@mafact.com>
* 1.40 07/13/2000 JFL&RAC
* Now supporting of New and Init method as Class(y) use it
* So oMyObj:new(Var1, Var2) will call oMyObj:Init(Var1, Var2)
* Currently limited to 20 params
*
* 1.41 07/18/2000 JFL&RAC
* Improving class(y) compatibility
* adding messages :error() and ::MsgNotFound()
*
* See doc/license.txt for licensing terms.
*
*/
/* WARNING: Can not use the preprocessor */
/* otherwise it will auto inherit from itself */
#include "common.ch"
#include "hboo.ch"
#include "error.ch"
FUNCTION HBObject()
STATIC s_oClass
LOCAL nScope := HB_OO_CLSTP_EXPORTED
Local oInstance
IF s_oClass == NIL
s_oClass := HBClass():New( "HBObject", )
/* Those Five worked fine but their C version from classes.c are probably better in term of speed */
/*s_oClass:AddInline( "CLASSNAME" , {| Self | __OBJGETCLSNAME( Self ) }, nScope ) */
/*s_oClass:AddInline( "CLASSH" , {| Self | __CLASSH( Self ) }, nScope ) */
/*s_oClass:AddInline( "CLASSSEL" , {| Self | __CLASSSEL( Self:CLASSH() ) }, nScope ) */
/*s_oClass:AddInline( "EVAL" , {| Self | __EVAL( Self ) }, nScope ) */
/* xBase++ */
s_oClass:AddInline( "ISDERIVEDFROM" , {| Self, xPar1 | __ObjDerivedFrom( Self, xPar1 ) }, nScope )
/* Class(y) */
s_oClass:AddInline( "ISKINDOF" , {| Self, xPar1 | __ObjDerivedFrom( Self, xPar1 ) }, nScope )
s_oClass:AddMethod( "NEW" , @HBObject_New() , nScope )
s_oClass:AddMethod( "INIT" , @HBObject_Init() , nScope )
s_oClass:AddMethod( "ERROR", @HBObject_Error() , nScope )
s_oClass:SetOnError( @HBObject_DftonError() )
s_oClass:AddInline( "MSGNOTFOUND" , {| Self, cMsg | ::Error( "Message not found", __OBJGETCLSNAME( Self ), cMsg, iif(substr(cMsg,1,1)=="_",1005,1004) ) }, nScope )
/*s_oClass:AddMultiData(,,nScope,{"CLASS"}, .F. )*/
/*s_oClass:AddInline( "ADDMETHOD" , { | Self, cMeth, pFunc, nScopeMeth | __clsAddMsg( __CLASSH( Self ) , cMeth , pFunc ,HB_OO_MSG_METHOD , NIL, iif(nScopeMeth==NIL,1,nScopeMeth) ) }, nScope ) */
/*s_oClass:AddInline( "ADDVAR" , { | Self, cVAR, nScopeMeth, uiData , hClass | __clsAddMsg( hClass:=__CLASSH( Self ) , cVar , uidata := __CLS_INCDATA(hClass) , HB_OO_MSG_ACCESS, NIL , iif(nScopeMeth==NIL,1,nScopeMeth) ) , ; */
/* __clsAddMsg( hClass , "_"+cVar , uiData , HB_OO_MSG_ASSIGN, NIL , iif(nScopeMeth==NIL,1,nScopeMeth) ) }, nScope ) */
/* Those one exist within Class(y), so we will probably try to implement it */
/*s_oClass:AddInline( "asString" , {| Self | ::class:name + " object" }, nScope ) */
/*s_oClass:AddInline( "asExpStr" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "basicSize" , {| Self | Len( Self ) }, nScope ) */
/*s_oClass:AddInline( "become" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "isEqual" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "isScalar" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "copy" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "deepCopy" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "deferred" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "exec" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "error , {| Self | }, nScope ) */
/*s_oClass:AddInline( "hash" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "null" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "size" , {| Self | Len( Self ) }, nScope ) */
/* Those three are already treated within Classes.c */
/*s_oClass:AddInline( "protectErr" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "hiddenErr" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "readOnlyErr" , {| Self | }, nScope ) */
/* No idea when those two could occur !!? */
/*s_oClass:AddInline( "wrongClass" , {| Self | }, nScope ) */
/*s_oClass:AddInline( "badMethod" , {| Self | }, nScope ) */
/* this one exist within VO and seem to be Auto Called when object ran out of scope */
/*s_oClass:AddInline( "Axit" , {| Self | }, nScope ) */
s_oClass:Create()
ENDIF
oInstance := s_oClass:Instance()
/*oInstance:class := s_oClass*/
RETURN oInstance
/* Currently limited to 20 param */
/* Will be re-written in C later to avoid this */
static function HBObject_New(xPar0, xPar1, xPar2, xPar3, xPar4, xPar5, xPar6, xPar7, xPar8, xPar9, ;
xPar10,xPar11,xPar12,xPar13,xPar14,xPar15,xPar16,xPar17,xPar18,xPar19 )
return QSelf():Init(xPar0, xPar1, xPar2, xPar3, xPar4, xPar5, xPar6, xPar7, xPar8, xPar9, ;
xPar10,xPar11,xPar12,xPar13,xPar14,xPar15,xPar16,xPar17,xPar18,xPar19 )
static function HBObject_Init()
return QSelf()
static function HBObject_Dftonerror(xPar0, xPar1, xPar2, xPar3, xPar4, xPar5, xPar6, xPar7, xPar8, xPar9, ;
xPar10,xPar11,xPar12,xPar13,xPar14,xPar15,xPar16,xPar17,xPar18,xPar19 )
return QSelf():MSGNOTFOUND( __GetMessage(), xPar0, xPar1, xPar2, xPar3, xPar4, xPar5, xPar6, xPar7, xPar8, xPar9, ;
xPar10,xPar11,xPar12,xPar13,xPar14,xPar15,xPar16,xPar17,xPar18,xPar19 )
static function HBObject_Error( cDesc, cClass, cMsg, nCode )
DEFAULT nCode TO 1004
IF nCode == 1005
RETURN __errRT_SBASE( EG_NOVARMETHOD, 1005, cDesc, cClass + ":" + cMsg, 1, QSelf() )
ENDIF
RETURN __errRT_SBASE( EG_NOMETHOD, nCode, cDesc, cClass + ":" + cMsg, 1, QSelf() )
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