359 lines
13 KiB
C
359 lines
13 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* Compiler main file
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*
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* Copyright 2000 Ryszard Glab <rglab@imid.med.pl>
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* www - http://www.harbour-project.org
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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 by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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 License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#include <assert.h>
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#include "hbcomp.h"
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/* helper structure to pass information */
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typedef struct HB_stru_fix_info
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{
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USHORT iNestedCodeblock;
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} HB_FIX_INFO, * HB_FIX_INFO_PTR;
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#define HB_FIX_FUNC( func ) HB_PCODE_FUNC( func, HB_FIX_INFO_PTR )
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typedef HB_FIX_FUNC( HB_FIX_FUNC_ );
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typedef HB_FIX_FUNC_ * HB_FIX_FUNC_PTR;
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static HB_FIX_FUNC( hb_p_pushstr )
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{
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HB_SYMBOL_UNUSED( cargo );
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return 3 + pFunc->pCode[ lPCodePos + 1 ] +
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pFunc->pCode[ lPCodePos + 2 ] * 256;
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}
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static HB_FIX_FUNC( hb_p_pushstrshort )
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{
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HB_SYMBOL_UNUSED( cargo );
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return 2 + pFunc->pCode[ lPCodePos + 1 ];
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}
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static HB_FIX_FUNC( hb_p_endblock )
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{
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HB_SYMBOL_UNUSED( pFunc );
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HB_SYMBOL_UNUSED( lPCodePos );
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--cargo->iNestedCodeblock;
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return 1;
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}
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static HB_FIX_FUNC( hb_p_pushblock )
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{
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USHORT wVar;
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USHORT * pLocal;
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ULONG ulStart = lPCodePos;
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++cargo->iNestedCodeblock;
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wVar = * ( ( USHORT * ) &( pFunc->pCode [ lPCodePos + 5 ] ) );
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/* opcode + codeblock size + number of parameters + number of local variables */
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lPCodePos += 7;
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/* fix local variable's reference */
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while( wVar-- )
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{
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pLocal = ( USHORT * ) &( pFunc->pCode [ lPCodePos ] );
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*pLocal += pFunc->wParamCount;
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lPCodePos +=2;
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}
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return lPCodePos - ulStart;
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}
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static HB_FIX_FUNC( hb_p_pushblockshort )
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{
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HB_SYMBOL_UNUSED( pFunc );
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HB_SYMBOL_UNUSED( lPCodePos );
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++cargo->iNestedCodeblock;
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return 2;
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}
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static HB_FIX_FUNC( hb_p_localname )
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{
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ULONG ulStart = lPCodePos;
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HB_SYMBOL_UNUSED( cargo );
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lPCodePos += 3;
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while( pFunc->pCode[ lPCodePos ] )
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++lPCodePos;
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return lPCodePos - ulStart + 1;
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}
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static HB_FIX_FUNC( hb_p_modulename )
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{
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ULONG ulStart = lPCodePos;
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HB_SYMBOL_UNUSED( cargo );
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lPCodePos += 3;
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while( pFunc->pCode[ lPCodePos ] )
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++lPCodePos;
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return lPCodePos - ulStart + 1;
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}
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static HB_FIX_FUNC( hb_p_poplocal )
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{
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if( cargo->iNestedCodeblock == 0 )
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{
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/* only local variables used outside of a codeblock need fixing
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*/
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SHORT * pVar = ( SHORT * ) &( pFunc->pCode )[ lPCodePos + 1 ];
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*pVar += pFunc->wParamCount;
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}
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return 3;
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}
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static HB_FIX_FUNC( hb_p_pushlocal )
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{
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if( cargo->iNestedCodeblock == 0 )
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{
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/* only local variables used outside of a codeblock need fixing
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*/
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SHORT * pVar = ( SHORT * ) &( pFunc->pCode )[ lPCodePos + 1 ];
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*pVar += pFunc->wParamCount;
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}
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return 3;
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}
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static HB_FIX_FUNC( hb_p_pushlocalref )
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{
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if( cargo->iNestedCodeblock == 0 )
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{
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/* only local variables used outside of a codeblock need fixing
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*/
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SHORT * pVar = ( SHORT * ) &( pFunc->pCode )[ lPCodePos + 1 ];
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*pVar += pFunc->wParamCount;
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}
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return 3;
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}
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static HB_FIX_FUNC( hb_p_poplocalnear )
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{
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if( cargo->iNestedCodeblock == 0 )
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{
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/* only local variables used outside of a codeblock need fixing
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*/
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SHORT * pVar = ( SHORT * ) &( pFunc->pCode )[ lPCodePos + 1 ];
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*pVar += pFunc->wParamCount;
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if( *pVar >= -128 && *pVar <= 127 )
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{
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pFunc->pCode[ lPCodePos + 2 ] = HB_P_NOOP;
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hb_compNOOPadd( pFunc, lPCodePos + 2 );
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}
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else
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{
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/* After fixing this variable cannot be accessed using near code
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*/
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pFunc->pCode[ lPCodePos ] = HB_P_POPLOCAL;
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}
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}
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return 3;
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}
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static HB_FIX_FUNC( hb_p_pushlocalnear )
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{
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if( cargo->iNestedCodeblock == 0 )
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{
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/* only local variables used outside of a codeblock need fixing
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*/
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SHORT * pVar = ( SHORT * ) &( pFunc->pCode )[ lPCodePos + 1 ];
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*pVar += pFunc->wParamCount;
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if( *pVar >= -128 && *pVar <= 127 )
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{
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pFunc->pCode[ lPCodePos + 2 ] = HB_P_NOOP;
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hb_compNOOPadd( pFunc, lPCodePos + 2 );
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}
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else
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{
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/* After fixing this variable cannot be accessed using near code
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*/
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pFunc->pCode[ lPCodePos ] = HB_P_PUSHLOCAL;
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}
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}
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return 3;
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}
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/* NOTE: The order of functions have to match the order of opcodes
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* mnemonics
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*/
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static HB_FIX_FUNC_PTR s_fixlocals_table[] =
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{
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NULL, /* HB_P_AND, */
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NULL, /* HB_P_ARRAYPUSH, */
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NULL, /* HB_P_ARRAYPOP, */
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NULL, /* HB_P_ARRAYDIM, */
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NULL, /* HB_P_ARRAYGEN, */
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NULL, /* HB_P_EQUAL, */
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hb_p_endblock, /* HB_P_ENDBLOCK, */
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NULL, /* HB_P_ENDPROC, */
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NULL, /* HB_P_EXACTLYEQUAL, */
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NULL, /* HB_P_FALSE, */
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NULL, /* HB_P_FORTEST, */
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NULL, /* HB_P_FUNCTION, */
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NULL, /* HB_P_FUNCTIONSHORT, */
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NULL, /* HB_P_FRAME, */
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NULL, /* HB_P_FUNCPTR, */
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NULL, /* HB_P_GREATER, */
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NULL, /* HB_P_GREATEREQUAL, */
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NULL, /* HB_P_DEC, */
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NULL, /* HB_P_DIVIDE, */
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NULL, /* HB_P_DO, */
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NULL, /* HB_P_DOSHORT, */
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NULL, /* HB_P_DUPLICATE, */
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NULL, /* HB_P_DUPLTWO, */
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NULL, /* HB_P_INC, */
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NULL, /* HB_P_INSTRING, */
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NULL, /* HB_P_JUMPNEAR, */
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NULL, /* HB_P_JUMP, */
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NULL, /* HB_P_JUMPFAR, */
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NULL, /* HB_P_JUMPFALSENEAR, */
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NULL, /* HB_P_JUMPFALSE, */
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NULL, /* HB_P_JUMPFALSEFAR, */
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NULL, /* HB_P_JUMPTRUENEAR, */
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NULL, /* HB_P_JUMPTRUE, */
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NULL, /* HB_P_JUMPTRUEFAR, */
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NULL, /* HB_P_LESSEQUAL, */
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NULL, /* HB_P_LESS, */
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NULL, /* HB_P_LINE, */
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hb_p_localname, /* HB_P_LOCALNAME, */
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NULL, /* HB_P_MACROPOP, */
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NULL, /* HB_P_MACROPOPALIASED, */
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NULL, /* HB_P_MACROPUSH, */
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NULL, /* HB_P_MACROPUSHALIASED, */
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NULL, /* HB_P_MACROSYMBOL, */
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NULL, /* HB_P_MACROTEXT, */
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NULL, /* HB_P_MESSAGE, */
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NULL, /* HB_P_MINUS, */
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NULL, /* HB_P_MODULUS, */
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hb_p_modulename, /* HB_P_MODULENAME, */
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/* start: pcodes generated by macro compiler */
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NULL, /* HB_P_MMESSAGE, */
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NULL, /* HB_P_MPOPALIASEDFIELD, */
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NULL, /* HB_P_MPOPALIASEDVAR, */
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NULL, /* HB_P_MPOPFIELD, */
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NULL, /* HB_P_MPOPMEMVAR, */
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NULL, /* HB_P_MPUSHALIASEDFIELD, */
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NULL, /* HB_P_MPUSHALIASEDVAR, */
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NULL, /* HB_P_MPUSHBLOCK, */
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NULL, /* HB_P_MPUSHFIELD, */
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NULL, /* HB_P_MPUSHMEMVAR, */
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NULL, /* HB_P_MPUSHMEMVARREF, */
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NULL, /* HB_P_MPUSHSYM, */
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NULL, /* HB_P_MPUSHVARIABLE, */
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/* end: */
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NULL, /* HB_P_MULT, */
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NULL, /* HB_P_NEGATE, */
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NULL, /* HB_P_NOOP, */
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NULL, /* HB_P_NOT, */
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NULL, /* HB_P_NOTEQUAL, */
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NULL, /* HB_P_OR, */
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NULL, /* HB_P_PARAMETER, */
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NULL, /* HB_P_PLUS, */
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NULL, /* HB_P_POP, */
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NULL, /* HB_P_POPALIAS, */
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NULL, /* HB_P_POPALIASEDFIELD, */
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NULL, /* HB_P_POPALIASEDFIELDNEAR, */
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NULL, /* HB_P_POPALIASEDVAR, */
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NULL, /* HB_P_POPFIELD, */
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hb_p_poplocal, /* HB_P_POPLOCAL, */
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hb_p_poplocalnear, /* HB_P_POPLOCALNEAR, */
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NULL, /* HB_P_POPMEMVAR, */
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NULL, /* HB_P_POPSTATIC, */
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NULL, /* HB_P_POPVARIABLE, */
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NULL, /* HB_P_POWER, */
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NULL, /* HB_P_PUSHALIAS, */
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NULL, /* HB_P_PUSHALIASEDFIELD, */
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NULL, /* HB_P_PUSHALIASEDFIELDNEAR, */
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NULL, /* HB_P_PUSHALIASEDVAR, */
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hb_p_pushblock, /* HB_P_PUSHBLOCK, */
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hb_p_pushblockshort, /* HB_P_PUSHBLOCKSHORT, */
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NULL, /* HB_P_PUSHFIELD, */
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NULL, /* HB_P_PUSHBYTE, */
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NULL, /* HB_P_PUSHINT, */
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hb_p_pushlocal, /* HB_P_PUSHLOCAL, */
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hb_p_pushlocalnear, /* HB_P_PUSHLOCALNEAR, */
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hb_p_pushlocalref, /* HB_P_PUSHLOCALREF, */
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NULL, /* HB_P_PUSHLONG, */
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NULL, /* HB_P_PUSHMEMVAR, */
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NULL, /* HB_P_PUSHMEMVARREF, */
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NULL, /* HB_P_PUSHNIL, */
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NULL, /* HB_P_PUSHDOUBLE, */
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NULL, /* HB_P_PUSHSELF, */
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NULL, /* HB_P_PUSHSTATIC, */
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NULL, /* HB_P_PUSHSTATICREF, */
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hb_p_pushstr, /* HB_P_PUSHSTR, */
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hb_p_pushstrshort, /* HB_P_PUSHSTRSHORT, */
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NULL, /* HB_P_PUSHSYM, */
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NULL, /* HB_P_PUSHSYMNEAR, */
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NULL, /* HB_P_PUSHVARIABLE, */
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NULL, /* HB_P_RETVALUE, */
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NULL, /* HB_P_SEND, */
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NULL, /* HB_P_SENDSHORT, */
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NULL, /* HB_P_SEQBEGIN, */
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NULL, /* HB_P_SEQEND, */
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NULL, /* HB_P_SEQRECOVER, */
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NULL, /* HB_P_SFRAME, */
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NULL, /* HB_P_STATICS, */
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NULL, /* HB_P_SWAPALIAS, */
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NULL, /* HB_P_TRUE, */
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NULL, /* HB_P_ZERO, */
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NULL /* HB_P_ONE, */
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};
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void hb_compFixFuncPCode( PFUNCTION pFunc )
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{
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HB_FIX_INFO fix_info;
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fix_info.iNestedCodeblock = 0;
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assert( HB_P_LAST_PCODE == sizeof( s_fixlocals_table ) / sizeof( HB_FIX_FUNC_PTR ) );
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hb_compPCodeEval( pFunc, ( HB_PCODE_FUNC_PTR * ) s_fixlocals_table, ( void * ) &fix_info );
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}
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