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36e08d55edfc69e92eff800fcf319b88a074a5fa
harbour-core/harbour/include/hbexprc.c
Przemyslaw Czerpak 0cada37011 2006-11-21 03:30 UTC+0100 Przemyslaw Czerpak (druzus/at/priv.onet.pl) 
* harbour/common.mak
  * harbour/source/compiler/Makefile
  * harbour/include/hbcomp.h
  * harbour/include/hbexprb.c
  * harbour/include/hbexprc.c
  * harbour/source/compiler/cmdcheck.c
  * harbour/source/compiler/genc.c
  * harbour/source/compiler/harbour.c
  * harbour/source/compiler/harbour.l
  * harbour/source/compiler/harbour.slx
  * harbour/source/compiler/harbour.y
  * harbour/source/compiler/hbgenerr.c
  * harbour/source/compiler/hbident.c
  * harbour/source/compiler/ppcomp.c
  + harbour/source/compiler/complex.c
    + added new PP based compiler lexer - it's smaller, MT safe and a
      little bit faster then then the FLEX version.
    + added HB_COMP structure to hold compiler data in future MT version
    + added global variable HB_COMP_PTR hb_comp_data to make conversion
      to MT easier - now it holds only PP and lexer data.
    * update PP related code in compiler to be MT safe
    + added %pure-parser, %parse-param and %lex-param for bison to generate
      MT safe grammar parser.
    * updated FLEX to work with recent compiler modifications and pure-parser
      bison API

  * harbour/makefile.bc
  * harbour/makefile.vc
  * harbour/source/macro/Makefile
  * harbour/source/macro/macro.l
  * harbour/source/macro/macro.y
  * harbour/source/macro/macrolex.c
    * use hb_macro prefix instead of hb_comp in bison/flex parser/lexer
      used in macro compiler to avoid possible conflicts in the future
    * separated lexer data

  * harbour/include/hbapi.h
  * harbour/include/hbpp.h
  * harbour/source/pp/ppcore.c
  * harbour/source/pp/ppgen.c
  * harbour/source/pp/pplib.c
  * harbour/source/vm/macro.c
    * removed not used members from HB_MACRO structure to make it
      cleaner before creating common to compiler and macro compiler
      structure
    + added new token HB_PP_TOKEN_EPSILON
    + added void * cargo parameters passed to executed user functions
    + hb_pp_tokenGet(), hb_pp_tokenToString(), hb_pp_tokenBlockString()
      functions for new PP based compiler lexer

  * harbour/utils/hbpp/hbpp.c
  * harbour/utils/hbpp/hbpp.h
  * harbour/utils/hbpp/hbppcomp.c
  * harbour/utils/hbpp/hbppcore.c
  * harbour/utils/hbpp/hbpplib.c
  * harbour/utils/hbpp/pragma.c
    * updated to compile with recent compiler header file modifications


    PP, new lexer and most of grammar parser should be MT safe. Now we should
    update all compiler functions to pass pointer to HB_COMP data structure
    where we should all current global variables. This structure as first
    member should have HB_CMPCOMMON structure which will hold common to
    compiler and macro compiler data. Ryszard I think you are the best person
    to define this structure.

    We have new lexer which is MT safe but please note that it has to be
    extensively tested so I would like to ask everybody to compile as much
    as possible different code and check if the final programs work as
    expected. Working on new code I removed some limitations existing in
    FLEX though not all. At the beginning I tried to replicate the exact
    FLEX behavior but I've found that in few places it does not work as
    it should so I begin to encode rules in a way which remove some
    limitations. In fact now it's much easier to control some things.
    I kept the FLEX code working and made all necessary modifications
    so it still can be used but keeping FLEX working cost us IMHO too
    much. It's not possible to introduce some improvements to grammar
    parser. All identifiers, keyword and macros returned by new lexer
    are converted to upper letters, do not have to be freed by hb_xfree()
    and is guarantied that will be always accessible. So from grammar file
    we can remove all hb_compIdentifierNew( hb_strupr($1), TRUE ) what
    should give noticeable speed improvement but will break the FLEX code.
    Ryszard and other you will have to decide if we will support FLEX in
    the future. We can also clean the code and remove most of other
    redundant hb_strupr() and hb_strdup() used in many places. BTW only
    one terminal symbol can be returned with lower letters: DOIDENT
    and I make it intentionally so it's possible to use:
         DO prog1 WITH "sth"
    on case sensitive file systems so this symbol should be cloned in
    upper cases as function symbol but used without modification as
    file name. It's current behavior but I'm not sure you will want
    to keep it. Maybe compiler switch to always convert file names
    created from
         DO <id> [WITH <params,...>]
    to lower cases will be better. Please think about it.
2006-11-21 02:29:33 +00:00

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/*
* $Id$
*/
/*
* Harbour Project source code:
* Compiler Expression Optimizer - utilities
*
* 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.
*
*/
/* TOFIX: Split the code, since MSC8 can't compile it, even in Huge model. */
/* TODO:
* - Correct post- and pre- operations to correctly handle the following code
* a[ i++ ]++
* Notice: in current implementation (an in Clipper too) 'i++' is evaluated
* two times! This causes that the new value (after incrementation) is
* stored in next element of the array.
*/
#include <math.h>
#include "hbcomp.h"
#include "hbmacro.ch"
#ifdef __WATCOMC__
/* disable warnings for 'no reference to symbol' */
#pragma warning 14 9
#endif
/* ************************************************************************* */
#if defined( HB_MACRO_SUPPORT )
static void hb_compExprSendPopPush( HB_EXPR_PTR pObj, HB_MACRO_DECL )
#else
static void hb_compExprSendPopPush( HB_EXPR_PTR pObj )
#endif
{
if( pObj->value.asMessage.pObject )
{
/* Push _message for later use */
if( pObj->value.asMessage.szMessage )
{
HB_EXPR_PCODE2( hb_compGenMessageData, pObj->value.asMessage.szMessage, TRUE );
}
else
{
HB_EXPR_USE( pObj->value.asMessage.pMessage, HB_EA_PUSH_PCODE );
}
/* Push object */
HB_EXPR_USE( pObj->value.asMessage.pObject, HB_EA_PUSH_PCODE );
#ifndef HB_USE_OBJMSG_REF
/* Now push current value of variable */
if( pObj->value.asMessage.szMessage )
{
HB_EXPR_PCODE2( hb_compGenMessage, pObj->value.asMessage.szMessage, TRUE );
}
else
{
HB_EXPR_USE( pObj->value.asMessage.pMessage, HB_EA_PUSH_PCODE );
}
/* Push object */
HB_EXPR_USE( pObj->value.asMessage.pObject, HB_EA_PUSH_PCODE );
#endif
}
else
{
/* Push _message for later use */
if( pObj->value.asMessage.szMessage )
{
HB_EXPR_PCODE2( hb_compGenMessageData, pObj->value.asMessage.szMessage, FALSE );
}
else
{
HB_EXPR_USE( pObj->value.asMessage.pMessage, HB_EA_PUSH_PCODE );
/* Push WITHOBJECTMESSAGE pcode */
HB_EXPR_PCODE2( hb_compGenMessage, NULL, FALSE );
}
#ifndef HB_USE_OBJMSG_REF
/* Now push current value of variable */
if( pObj->value.asMessage.szMessage )
{
HB_EXPR_PCODE2( hb_compGenMessage, pObj->value.asMessage.szMessage, FALSE );
}
else
{
HB_EXPR_USE( pObj->value.asMessage.pMessage, HB_EA_PUSH_PCODE );
/* Push WITHOBJECTMESSAGE pcode */
HB_EXPR_PCODE2( hb_compGenMessage, NULL, FALSE );
}
#endif
}
}
#if defined( HB_MACRO_SUPPORT )
void hb_compExprDelOperator( HB_EXPR_PTR pExpr, HB_MACRO_DECL )
#else
void hb_compExprDelOperator( HB_EXPR_PTR pExpr )
#endif
{
if( pExpr->value.asOperator.pLeft )
HB_EXPR_PCODE1( hb_compExprDelete, pExpr->value.asOperator.pLeft );
if( pExpr->value.asOperator.pRight )
HB_EXPR_PCODE1( hb_compExprDelete, pExpr->value.asOperator.pRight );
}
/* Generates pcodes for compound operators += -= *= /= %= ^=
*
* pExpr is an expression created by hb_compExprNew<operator>Eq functions
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprPushOperEq( HB_EXPR_PTR pSelf, BYTE bOpEq, HB_MACRO_DECL )
#else
void hb_compExprPushOperEq( HB_EXPR_PTR pSelf, BYTE bOpEq )
#endif
{
/* NOTE: an object instance variable needs special handling
*/
if( pSelf->value.asOperator.pLeft->ExprType == HB_ET_SEND )
{
/* NOTE: COMPATIBILITY ISSUE:
* The above HB_C52_STRICT setting determines
* the way the chained send messages are handled.
* For example, the following code:
*
* a:b( COUNT() ):c += 1
*
* will be handled as:
*
* a:b( COUNT() ):c := a:b( COUNT() ):c + 1
*
* in strict Clipper compatibility mode and
*
* temp := a:b( COUNT() ), temp:c += 1
*
* in non-strict mode.
* In practice in Clipper it will call COUNT() function two times: the
* first time before addition and the second one after addition - in Harbour,
* COUNT() function will be called only once, before addition.
* The Harbour (non-strict) method is:
* 1) faster
* 2) it guarantees that the same instance variable of the same object will
* be changed
*/
HB_EXPR_PCODE1( hb_compExprSendPopPush, pSelf->value.asOperator.pLeft );
/* Do it. */
/* Temporary disabled optimization with references to object variables
untill we will not have extended reference items in our HVM [druzus] */
#ifdef HB_USE_OBJMSG_REF
if( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ||
bOpEq == HB_P_MULT || bOpEq == HB_P_DIVIDE )
{
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_PUSHOVARREF );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* increase operation */
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQ;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQ;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQ;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQ;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
}
else
#endif
{
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 0, ( BOOL ) 1 );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* increase operation */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
/* call pop message with one argument */
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 1, ( BOOL ) 1 );
}
return;
}
/* TODO: add a special code for arrays to correctly handle a[ i++ ]++
*/
#if ! defined( HB_MACRO_SUPPORT )
else if( ( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ||
bOpEq == HB_P_MULT || bOpEq == HB_P_DIVIDE ) &&
( pSelf->value.asOperator.pLeft->ExprType == HB_ET_VARIABLE ) )
{
int iScope = hb_compVariableScope( pSelf->value.asOperator.pLeft->value.asSymbol );
if( iScope != HB_VS_LOCAL_FIELD && iScope != HB_VS_GLOBAL_FIELD &&
iScope != HB_VS_UNDECLARED )
{
HB_EXPRTYPE iType = pSelf->value.asOperator.pRight->ExprType;
if( iType == HB_ET_NUMERIC || iType == HB_ET_STRING )
{
if( iScope == HB_VS_LOCAL_VAR && iType == HB_ET_NUMERIC &&
( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ) )
{
int iLocal = hb_compLocalGetPos( pSelf->value.asOperator.pLeft->value.asSymbol );
if( iLocal < 256 && hb_compExprIsInteger( pSelf->value.asOperator.pRight ) )
{
short iIncrement = ( short ) pSelf->value.asOperator.pRight->value.asNum.lVal;
if( bOpEq != HB_P_MINUS || iIncrement >= -INT16_MAX )
{
if( bOpEq == HB_P_MINUS )
{
iIncrement = -iIncrement;
}
hb_compGenPCode4( HB_P_LOCALNEARADDINT, ( BYTE ) iLocal, HB_LOBYTE( iIncrement ), HB_HIBYTE( iIncrement ), ( BOOL ) 0 );
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
return;
}
}
}
/* NOTE: direct type change */
pSelf->value.asOperator.pLeft->ExprType = HB_ET_VARREF;
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQ;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQ;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQ;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQ;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
return;
}
else if( pSelf->value.asOperator.pRight->ExprType == HB_ET_VARIABLE )
{
int iScope = hb_compVariableScope( pSelf->value.asOperator.pRight->value.asSymbol );
if( iScope != HB_VS_LOCAL_FIELD && iScope != HB_VS_GLOBAL_FIELD &&
iScope != HB_VS_UNDECLARED )
{
/* NOTE: direct type change */
pSelf->value.asOperator.pLeft->ExprType = HB_ET_VARREF;
pSelf->value.asOperator.pRight->ExprType = HB_ET_VARREF;
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQ;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQ;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQ;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQ;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
return;
}
}
}
}
#endif
/* push old value */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* perform operation and duplicate the new value */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_DUPLICATE );
/* pop the new value into variable and leave the copy on the stack */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_POP_PCODE );
}
/* Generates pcodes for <operator>= syntax
* used standalone as a statement (it cannot leave the value on the stack)
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprUseOperEq( HB_EXPR_PTR pSelf, BYTE bOpEq, HB_MACRO_DECL )
#else
void hb_compExprUseOperEq( HB_EXPR_PTR pSelf, BYTE bOpEq )
#endif
{
/* NOTE: an object instance variable needs special handling
*/
if( pSelf->value.asOperator.pLeft->ExprType == HB_ET_SEND )
{
HB_EXPR_PCODE1( hb_compExprSendPopPush, pSelf->value.asOperator.pLeft );
/* Do it.*/
/* Temporary disabled optimization with references to object variables
untill we will not have extended reference items in our HVM [druzus] */
#ifdef HB_USE_OBJMSG_REF
if( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ||
bOpEq == HB_P_MULT || bOpEq == HB_P_DIVIDE )
{
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_PUSHOVARREF );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* increase operation and pop the unneeded value from the stack */
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQPOP;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQPOP;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQPOP;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQPOP;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
}
else
#endif
{
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 0, ( BOOL ) 1 );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* increase operation */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
/* Now do the assignment - call pop message with one argument */
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 1, ( BOOL ) 1 );
/* pop the unneeded value from the stack */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_POP );
}
return;
}
/* TODO: add a special code for arrays to correctly handle a[ i++ ]++
*/
#if ! defined( HB_MACRO_SUPPORT )
else if( ( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ||
bOpEq == HB_P_MULT || bOpEq == HB_P_DIVIDE ) &&
( pSelf->value.asOperator.pLeft->ExprType == HB_ET_VARIABLE ) )
{
int iScope = hb_compVariableScope( pSelf->value.asOperator.pLeft->value.asSymbol );
if( iScope != HB_VS_LOCAL_FIELD && iScope != HB_VS_GLOBAL_FIELD &&
iScope != HB_VS_UNDECLARED )
{
HB_EXPRTYPE iType = pSelf->value.asOperator.pRight->ExprType, iOldType;
if( iType == HB_ET_NUMERIC || iType == HB_ET_STRING )
{
if( iScope == HB_VS_LOCAL_VAR && iType == HB_ET_NUMERIC &&
( bOpEq == HB_P_PLUS || bOpEq == HB_P_MINUS ) )
{
int iLocal = hb_compLocalGetPos( pSelf->value.asOperator.pLeft->value.asSymbol );
if( iLocal < 256 && hb_compExprIsInteger( pSelf->value.asOperator.pRight ) )
{
short iIncrement = ( short ) pSelf->value.asOperator.pRight->value.asNum.lVal;
if( bOpEq != HB_P_MINUS || iIncrement >= -INT16_MAX )
{
if( bOpEq == HB_P_MINUS )
{
iIncrement = -iIncrement;
}
hb_compGenPCode4( HB_P_LOCALNEARADDINT, ( BYTE ) iLocal, HB_LOBYTE( iIncrement ), HB_HIBYTE( iIncrement ), ( BOOL ) 0 );
return;
}
}
}
/* NOTE: direct type change */
iOldType = pSelf->value.asOperator.pLeft->ExprType;
pSelf->value.asOperator.pLeft->ExprType = HB_ET_VARREF;
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQPOP;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQPOP;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQPOP;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQPOP;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
pSelf->value.asOperator.pLeft->ExprType = iOldType;
return;
}
else if( pSelf->value.asOperator.pRight->ExprType == HB_ET_VARIABLE )
{
int iScope = hb_compVariableScope( pSelf->value.asOperator.pRight->value.asSymbol );
if( iScope != HB_VS_LOCAL_FIELD && iScope != HB_VS_GLOBAL_FIELD &&
iScope != HB_VS_UNDECLARED )
{
/* NOTE: direct type change */
iOldType = pSelf->value.asOperator.pLeft->ExprType;
pSelf->value.asOperator.pLeft->ExprType = HB_ET_VARREF;
pSelf->value.asOperator.pRight->ExprType = HB_ET_VARREF;
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
switch( bOpEq )
{
case HB_P_PLUS:
bOpEq = HB_P_PLUSEQPOP;
break;
case HB_P_MINUS:
bOpEq = HB_P_MINUSEQPOP;
break;
case HB_P_MULT:
bOpEq = HB_P_MULTEQPOP;
break;
case HB_P_DIVIDE:
bOpEq = HB_P_DIVEQPOP;
break;
}
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
pSelf->value.asOperator.pLeft->ExprType = iOldType;
pSelf->value.asOperator.pRight->ExprType = iType;
return;
}
}
}
}
#endif
/* push old value */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* push increment value */
HB_EXPR_USE( pSelf->value.asOperator.pRight, HB_EA_PUSH_PCODE );
/* add */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOpEq );
/* pop the new value into variable and remove it from the stack */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_POP_PCODE );
}
/* Generates the pcodes for pre- increment/decrement expressions
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprPushPreOp( HB_EXPR_PTR pSelf, BYTE bOper, HB_MACRO_DECL )
#else
void hb_compExprPushPreOp( HB_EXPR_PTR pSelf, BYTE bOper )
#endif
{
/* NOTE: an object instance variable needs special handling
*/
if( pSelf->value.asOperator.pLeft->ExprType == HB_ET_SEND )
{
HB_EXPR_PCODE1( hb_compExprSendPopPush, pSelf->value.asOperator.pLeft );
/* Do it. */
/* Temporary disabled optimization with references to object variables
untill we will not have extended reference items in our HVM [druzus] */
#ifdef HB_USE_OBJMSG_REF
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_PUSHOVARREF );
/* increase/decrease operation */
/* We have to unreference the item on the stack, because we do not have
such PCODE(s) then I'll trnaslate HB_P_INC/HB_P_DEC into
HB_P_[PLUS|MINUS]EQ, Maybe in the future we will make it
in differ way [druzus] */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_ONE );
bOper = ( bOper == HB_P_INC ) ? HB_P_PLUSEQ : HB_P_MINUSEQ;
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOper );
#else
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 0, ( BOOL ) 1 );
/* increase/decrease operation */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOper );
/* Now, do the assignment - call pop message with one argument - it leaves the value on the stack */
HB_EXPR_GENPCODE2( hb_compGenPCode2, HB_P_SENDSHORT, 1, ( BOOL ) 1 );
#endif
}
else
{
/* Push current value */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* Increment */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOper );
/* duplicate a value */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_DUPLICATE );
/* pop new value and leave the duplicated copy of it on the stack */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_POP_PCODE );
}
}
/* Generates the pcodes for post- increment/decrement expressions
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprPushPostOp( HB_EXPR_PTR pSelf, BYTE bOper, HB_MACRO_DECL )
#else
void hb_compExprPushPostOp( HB_EXPR_PTR pSelf, BYTE bOper )
#endif
{
/* NOTE: an object instance variable needs special handling
*/
if( pSelf->value.asOperator.pLeft->ExprType == HB_ET_SEND )
{
/* push current value - it will be a result of whole expression */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* now increment the value */
HB_EXPR_PCODE2( hb_compExprPushPreOp, pSelf, bOper );
/* pop the value from the stack */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_POP );
}
else
{
/* Push current value */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* Duplicate value */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_DUPLICATE );
/* Increment */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOper );
/* pop new value from the stack */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_POP_PCODE );
}
}
/* Generates the pcodes for increment/decrement operations
* used standalone as a statement
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprUsePreOp( HB_EXPR_PTR pSelf, BYTE bOper, HB_MACRO_DECL )
#else
void hb_compExprUsePreOp( HB_EXPR_PTR pSelf, BYTE bOper )
#endif
{
/* NOTE: an object instance variable needs special handling
*/
if( pSelf->value.asOperator.pLeft->ExprType == HB_ET_SEND )
{
HB_EXPR_PCODE2( hb_compExprPushPreOp, pSelf, bOper );
/* pop the value from the stack */
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_POP );
}
else
{
/* Push current value */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_PUSH_PCODE );
/* Increment */
HB_EXPR_GENPCODE1( hb_compGenPCode1, bOper );
/* pop new value from the stack */
HB_EXPR_USE( pSelf->value.asOperator.pLeft, HB_EA_POP_PCODE );
}
}
/* Generate pcode for aliased expression which contains macro operator on
* the left or right side of the alias operator
* expression->&macro or &macro->expression or &macro->&macro
*/
#if defined( HB_MACRO_SUPPORT )
void hb_compExprUseAliasMacro( HB_EXPR_PTR pAliasedVar, BYTE bAction, HB_MACRO_DECL )
#else
void hb_compExprUseAliasMacro( HB_EXPR_PTR pAliasedVar, BYTE bAction )
#endif
{
HB_EXPR_PTR pAlias, pVar;
/* Alias->Var
*/
pAlias = pAliasedVar->value.asAlias.pAlias;
pVar = pAliasedVar->value.asAlias.pVar;
if( pAlias->ExprType == HB_ET_ALIAS )
{
/* database alias */
/* Push alias identifier as string so it can be joined with
* variable at runtime
* NOTE:
* ALIAS->&var is the same as &( "ALIAS->" + var )
*
*/
HB_EXPR_PCODE2( hb_compGenPushString, pAlias->value.asSymbol, strlen(pAlias->value.asSymbol) + 1 );
HB_EXPR_USE( pVar, HB_EA_PUSH_PCODE );
if( bAction == HB_EA_PUSH_PCODE )
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPUSHALIASED );
else
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPOPALIASED );
}
else if( pVar->ExprType == HB_ET_VARIABLE )
{
/* NOTE:
* &macro->var is the same as: &( macro + "->var" )
*/
HB_EXPR_USE( pAlias, HB_EA_PUSH_PCODE );
HB_EXPR_PCODE2( hb_compGenPushString, pVar->value.asSymbol, strlen(pVar->value.asSymbol) + 1 );
if( bAction == HB_EA_PUSH_PCODE )
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPUSHALIASED );
else
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPOPALIASED );
}
else
{
HB_EXPR_USE( pAlias, HB_EA_PUSH_PCODE );
HB_EXPR_USE( pVar, HB_EA_PUSH_PCODE );
if( bAction == HB_EA_PUSH_PCODE )
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPUSHALIASED );
else
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_P_MACROPOPALIASED );
}
/* Always add add byte to pcode indicating requested macro compiler flag. */
#if defined( HB_MACRO_SUPPORT )
HB_EXPR_GENPCODE1( hb_compGenPCode1, HB_COMPFLAG_RT_MACRO );
#else
HB_EXPR_GENPCODE1( hb_compGenPData1,
( hb_comp_Supported & HB_COMPFLAG_HARBOUR ? HB_SM_HARBOUR : 0 ) |
( hb_comp_Supported & HB_COMPFLAG_XBASE ? HB_SM_XBASE : 0 ) |
( hb_comp_bShortCuts ? HB_SM_SHORTCUTS : 0 ) |
( hb_comp_Supported & HB_COMPFLAG_RT_MACRO ? HB_SM_RT_MACRO : 0 ) );
#endif
}
/* Reduces the list of expressions
*
* pExpr is the first expression on the list
*/
#if defined( HB_MACRO_SUPPORT )
ULONG hb_compExprReduceList( HB_EXPR_PTR pExpr, HB_MACRO_DECL )
#else
ULONG hb_compExprReduceList( HB_EXPR_PTR pExpr )
#endif
{
HB_EXPR_PTR pNext;
HB_EXPR_PTR * pPrev;
ULONG ulCnt = 0;
/* NOTE: During optimalization an expression on the list can be
* replaced by the new one
*/
pPrev = &pExpr->value.asList.pExprList;
pExpr = pExpr->value.asList.pExprList;
while( pExpr )
{
pNext = pExpr->pNext; /* store next expression in case the current will be reduced */
pExpr = HB_EXPR_USE( pExpr, HB_EA_REDUCE );
*pPrev = pExpr; /* store a new expression into the previous one */
pExpr->pNext = pNext; /* restore the link to next expression */
pPrev = &pExpr->pNext;
pExpr = pNext;
++ulCnt;
}
return ulCnt;
}
BOOL hb_compExprIsValidMacro( char * szText, BOOL *pbUseTextSubst, HB_MACRO_DECL )
{
char * pTmp = szText;
BOOL bTextSubst;
BOOL bMacroText = TRUE;
*pbUseTextSubst = FALSE; /* no valid macro expression */
while( ((pTmp = strchr( pTmp, '&' )) != NULL) && bMacroText )
{
/* Check if macro operator is used inside a string
* Macro operator is ignored if it is the last char or
* next char is '(' e.g. "this is &(ignored)"
* (except if strict Clipper compatibility mode is enabled)
*
* NOTE: This uses _a-zA-Z pattern to check for
* beginning of a variable name
*/
if( ! HB_COMP_ISSUPPORTED(HB_COMPFLAG_HARBOUR) )
*pbUseTextSubst = TRUE; /* always macro substitution in Clipper */
++pTmp;
bTextSubst = ( *pTmp == '_' || (*pTmp >= 'A' && *pTmp <= 'Z') || (*pTmp >= 'a' && *pTmp <= 'z') );
/* NOTE: All variables are assumed memvars in macro compiler -
* there is no need to check for a valid name
*/
if( bTextSubst )
{
#if defined( HB_MACRO_SUPPORT )
HB_SYMBOL_UNUSED( bMacroText );
*pbUseTextSubst = TRUE; /* valid macro expression */
return TRUE; /*there is no need to check all '&' occurences */
#else
/* There is a valid character after '&' that can be used in
* variable name - check if the whole variable name is valid
* (local, static and field variable names are invalid because
* they are not visible at runtime)
*/
char * pStart = pTmp;
char cSave;
/* NOTE: This uses _a-zA-Z0-9 pattern to check for
* variable name
*/
while( *pTmp && (*pTmp == '_' || (*pTmp >= 'A' && *pTmp <= 'Z') || (*pTmp >= 'a' && *pTmp <= 'z') || (*pTmp >= '0' && *pTmp <= '9')) )
++pTmp;
cSave = *pTmp;
*pTmp = '\0';
bMacroText &= hb_compIsValidMacroVar( pStart );
*pTmp = cSave;
#endif
}
*pbUseTextSubst |= bTextSubst;
}
HB_SYMBOL_UNUSED( HB_MACRO_VARNAME ); /* to suppress BCC warning */
return bMacroText;
}
/* Reduces the list of expressions
*
* pExpr is the first expression on the list
*/
HB_EXPR_PTR hb_compExprReducePlusStrings( HB_EXPR_PTR pLeft, HB_EXPR_PTR pRight, HB_MACRO_DECL )
{
if( pLeft->value.asString.dealloc )
{
pLeft->value.asString.string = (char *) hb_xrealloc( pLeft->value.asString.string, pLeft->ulLength + pRight->ulLength + 1 );
memcpy( pLeft->value.asString.string + pLeft->ulLength,
pRight->value.asString.string, pRight->ulLength );
pLeft->ulLength += pRight->ulLength;
pLeft->value.asString.string[ pLeft->ulLength ] = '\0';
hb_compExprFree( pRight, HB_MACRO_PARAM );
}
else
{
char *szString;
szString = (char *) hb_xgrab( pLeft->ulLength + pRight->ulLength + 1 );
memcpy( szString, pLeft->value.asString.string, pLeft->ulLength );
memcpy( szString + pLeft->ulLength, pRight->value.asString.string, pRight->ulLength );
pLeft->ulLength += pRight->ulLength;
szString[ pLeft->ulLength ] = '\0';
pLeft->value.asString.string = szString;
pLeft->value.asString.dealloc = TRUE;
hb_compExprFree( pRight, HB_MACRO_PARAM );
}
HB_SYMBOL_UNUSED( HB_MACRO_VARNAME ); /* to suppress BCC warning */
return pLeft;
}
#ifdef __WATCOMC__
/* enable warnings for unreferenced symbols */
#pragma warning 14 2
#endif
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