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8128564f468cfbc1ae31430271ee722c2730b30d
harbour-core/harbour/include/hbexprop.h
Przemyslaw Czerpak 3611daa5a2 2008-01-11 18:01 UTC+0100 Przemyslaw Czerpak (druzus/at/priv.onet.pl) 
* harbour/include/hbapiitm.h
  * harbour/source/vm/itemapi.c
    + added new functions:
         BOOL hb_itemParamStore( USHORT uiParam, PHB_ITEM pItem )
         BOOL hb_itemParamStoreForward( USHORT uiParam, PHB_ITEM pItem )
      They copy/move pItem body to parameter passed by reference and
      return TRUE when operation was done successfully (uiParam was passed
      by reference)
    + added new functions for string manipulation:
         char * hb_itemLockReadCPtr( PHB_ITEM pItem, ULONG * pulLen );
         char * hb_itemLockWriteCPtr( PHB_ITEM pItem, ULONG * pulLen );
         void   hb_itemUnLockCPtr( char * pszString );
      It's recommended to use them instead of hb_itemGetCPtr().
      Pointer to string buffer returned by hb_itemLockReadCPtr() will
      be always valid even if source item will be cleared, destroyed or
      overwritten until hb_itemUnLockCPtr() is called. Each locked string
      has to be unlocked to avoid memory leaks. After unlocking the string
      pointer cannot be longer used.
      hb_itemLockWriteCPtr() works like hb_itemLockReadCPtr() but string
      pointer returned by this function is writable so user can change
      the body of string item. It's the _ONLY_ one way when it's possible.
      Modifying string items using pointers returned by hb_parc() or
      hb_itemGetCPtr() or extracted directly from HB_ITEM body is _FORBIDDEN_
      and can cause unpredictable results (GPF when constant/readonly memory
      pages are changed, changing many different items which share the same
      memory buffer, etc.).
      This is code illustrates how to use hb_itemLockReadCPtr()/
      hb_itemUnLockCPtr() and it's also good example why hb_itemGetCPtr()
      is very danger function and cannot be used in such case - if you
      replace hb_itemLockReadCPtr() with hb_itemGetCPtr() and remove
      hb_itemUnLockCPtr() then you will have buggy code.

         HB_FUNC( MYFUNC )
         {
            PHB_ITEM pObject = hb_param( 1, HB_IT_OBJECT )
            if( pObject )
            {
               char * pszName1, * pszName2;
               PHB_ITEM pResult;

               pResult = hb_objSendMsg( pObject, "POP", 0 );
               pszName1 = hb_itemLockReadCPtr( pResult, NULL );
               pResult = hb_objSendMsg( pObject, "POP", 0 );
               pszName2 = hb_itemLockReadCPtr( pResult, NULL );
               if( pszName1 && pszName2 )
                  hb_retc_buffer( hb_xstrcpy( NULL,
                              "[", pszName1, "]-[", pszName2, "]", NULL ) );
               hb_itemUnLockCPtr( pszName1 );
               hb_itemUnLockCPtr( pszName2 );
            }
         }

      This code shows how to use hb_itemLockWriteCPtr():
         proc main()
            local cVal, cVal2
            cVal := cVal2 := "ABC"
            STRPUT( @cVal2, 2, 42 )
            ? cVal, cVal2
         return
         #pragma begindump
         #include "hbapiitm.h"
         HB_FUNC( STRPUT )
         {
            PHB_ITEM pString = hb_param( 1, HB_IT_STRING );
            ULONG ulAt = hb_parnl( 2 );
            if( pString && ulAt && ISNUM( 3 ) )
            {
               ULONG ulLen;
               char * pszValue;
               pszValue = hb_itemLockWriteCPtr( pString, &ulLen );
               if( pszValue )
               {
                  if( ulAt <= ulLen )
                     pszValue[ ulAt - 1 ] = ( char ) hb_parni( 3 );
                  hb_itemUnLockCPtr( pszValue );
               }
            }
         }
         #pragma enddump

  * harbour/include/hbcompdf.h
  * harbour/include/hbexprop.h
  * harbour/include/hbexprb.c
  * harbour/source/compiler/hbmain.c
  * harbour/source/compiler/cmdcheck.c
  * harbour/source/compiler/hbusage.c
    * removed HB_I18N_SUPPORT macro and enabled I18N code in default build
2008-01-11 17:01:34 +00:00

206 lines
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/*
* $Id$
*/
/*
* Harbour Project source code:
* Header file for the Harbour Compiler
*
* Copyright 1999 Ryszard Glab
* 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.
*
*/
#ifndef HB_EXPROP_H_
#define HB_EXPROP_H_
#include "hbapi.h"
HB_EXTERN_BEGIN
/* Definitions of function templates used in expression's message
* handling
*/
#define HB_EXPR_FUNC( proc ) HB_EXPR_PTR proc( HB_EXPR_PTR pSelf, HB_EXPR_MESSAGE iMessage, HB_COMP_DECL )
typedef HB_EXPR_FUNC( HB_EXPR_FUNC_ );
typedef HB_EXPR_FUNC_ *HB_EXPR_FUNC_PTR;
typedef HB_EXPR_PTR HB_EXPR_ACTION( HB_EXPR_PTR pSelf, int iMessage, HB_COMP_DECL );
#define HB_EXPR_PCODE0( action ) action( HB_COMP_PARAM )
#define HB_EXPR_PCODE1( action, p1 ) action( (p1), HB_COMP_PARAM )
#define HB_EXPR_PCODE2( action, p1, p2 ) action( (p1), (p2), HB_COMP_PARAM )
#define HB_EXPR_PCODE3( action, p1, p2, p3 ) action( (p1), (p2), (p3), HB_COMP_PARAM )
#define HB_EXPR_PCODE4( action, p1, p2, p3, p4 ) action( (p1), (p2), (p3), (p4), HB_COMP_PARAM )
#if defined( HB_MACRO_SUPPORT )
#define hb_comp_ExprTable hb_macro_ExprTable
#endif
#if !defined( HB_COMMON_SUPPORT )
extern const HB_EXPR_FUNC_PTR hb_comp_ExprTable[ HB_EXPR_COUNT ];
#define HB_EXPR_USE( pSelf, iMessage ) \
hb_comp_ExprTable[ (pSelf)->ExprType ]( (pSelf), (iMessage), HB_COMP_PARAM )
#endif
extern HB_EXPR_PTR hb_compExprNewEmpty( HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewNil( HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewDouble( double, BYTE, BYTE, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewLong( HB_LONG, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewDate( HB_LONG, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewString( char *, ULONG, BOOL, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewLogical( int, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewSelf( HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewCodeBlock( char *, ULONG, int, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewVar( char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewAliasVar( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewAliasExpr( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMacro( HB_EXPR_PTR, unsigned char, char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewFunName( char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewRTVar( char *, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewAlias( char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewEQ( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewNE( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewLT( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewLE( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewGT( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewGE( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewIN( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPlus( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMinus( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMult( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewDiv( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMod( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPower( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewAssign( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewEqual( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPlusEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMinusEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMultEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewDivEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewModEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewExpEq( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPostInc( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPostDec( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPreInc( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewPreDec( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewAnd( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewOr( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewNot( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewNegate( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewVarRef( char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewFunRef( char *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewFunCall( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewRef( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewCodeblockExpr( HB_EXPR_PTR, HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprNewSend( HB_EXPR_PTR, char *szMessage, HB_EXPR_PTR pMessage, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewMethodCall( HB_EXPR_PTR, HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprNewList( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewArgList( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewArgRef( HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewArray( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewHash( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprNewArrayAt( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprAddListExpr( HB_EXPR_PTR, HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprCBVarAdd( HB_EXPR_PTR, char *, BYTE, HB_COMP_DECL );
extern void hb_compExprCBVarDel( HB_CBVAR_PTR );
extern HB_EXPR_PTR hb_compExprAddCodeblockExpr( HB_EXPR_PTR, HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprSetCodeblockBody( HB_EXPR_PTR pExpr, BYTE * pCode, ULONG ulLen );
extern HB_EXPR_PTR hb_compExprNewIIF( HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprMacroAsAlias( HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprAssign( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprEqual( HB_EXPR_PTR, HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprAssignStatic( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprClone( HB_EXPR_PTR pSrc );
extern ULONG hb_compExprListLen( HB_EXPR_PTR );
extern ULONG hb_compExprParamListLen( HB_EXPR_PTR );
extern ULONG hb_compExprMacroListLen( HB_EXPR_PTR );
extern ULONG hb_compExprParamListCheck( HB_COMP_DECL, HB_EXPR_PTR );
extern const char * hb_compExprDescription( HB_EXPR_PTR );
extern int hb_compExprType( HB_EXPR_PTR );
extern int hb_compExprIsInteger( HB_EXPR_PTR );
extern int hb_compExprIsLong( HB_EXPR_PTR );
extern int hb_compExprAsInteger( HB_EXPR_PTR );
extern int hb_compExprAsNumSign( HB_EXPR_PTR );
extern int hb_compExprIsString( HB_EXPR_PTR );
extern int hb_compExprAsStringLen( HB_EXPR_PTR );
extern char * hb_compExprAsString( HB_EXPR_PTR );
extern char * hb_compExprAsSymbol( HB_EXPR_PTR );
extern HB_EXPR_PTR hb_compExprListStrip( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprIsValidMacro( char *, ULONG, BOOL *, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprSetOperand( HB_EXPR_PTR, HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprSetGetBlock( HB_EXPR_PTR pExpr, HB_COMP_DECL );
extern void hb_compExprDelOperator( HB_EXPR_PTR, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceMod( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceDiv( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceMult( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceMinus( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReducePlus( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceIN( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceNE( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceGE( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceLE( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceGT( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceLT( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceEQ( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceAnd( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceOr( HB_EXPR_PTR pSelf, HB_COMP_DECL );
extern HB_EXPR_PTR hb_compExprReduceIIF( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceAT( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceCHR( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceLEN( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceASC( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceSTOD( HB_EXPR_PTR pSelf, USHORT usCount, HB_COMP_DECL );
extern BOOL hb_compExprReduceCTOD( HB_EXPR_PTR, HB_COMP_DECL );
extern BOOL hb_compExprReduceUPPER( HB_EXPR_PTR, HB_COMP_DECL );
extern void hb_compI18nAdd( HB_COMP_DECL, const char* szText, const char* szContext, UINT uiLine );
HB_EXTERN_END
#endif /* HB_EXPROP_H_ */
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