265 lines
10 KiB
C
265 lines
10 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 PCode generation functions
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*
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* Copyright 1999 {list of individual authors and e-mail addresses}
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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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static BYTE s_pcode_len[] = {
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1, /* HB_P_AND, */
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1, /* HB_P_ARRAYPUSH, */
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1, /* HB_P_ARRAYPOP, */
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3, /* HB_P_ARRAYDIM, */
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3, /* HB_P_ARRAYGEN, */
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1, /* HB_P_EQUAL, */
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1, /* HB_P_ENDBLOCK, */
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1, /* HB_P_ENDPROC, */
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1, /* HB_P_EXACTLYEQUAL, */
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1, /* HB_P_FALSE, */
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1, /* HB_P_FORTEST, */
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3, /* HB_P_FUNCTION, */
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2, /* HB_P_FUNCTIONSHORT, */
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3, /* HB_P_FRAME, */
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1, /* HB_P_FUNCPTR, */
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1, /* HB_P_GREATER, */
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1, /* HB_P_GREATEREQUAL, */
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1, /* HB_P_DEC, */
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1, /* HB_P_DIVIDE, */
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3, /* HB_P_DO, */
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2, /* HB_P_DOSHORT, */
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1, /* HB_P_DUPLICATE, */
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1, /* HB_P_DUPLTWO, */
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1, /* HB_P_INC, */
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1, /* HB_P_INSTRING, */
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2, /* HB_P_JUMPSHORT, */
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3, /* HB_P_JUMP, */
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4, /* HB_P_JUMPFAR, */
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2, /* HB_P_JUMPSHORTFALSE, */
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3, /* HB_P_JUMPFALSE, */
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4, /* HB_P_JUMPFARFALSE, */
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2, /* HB_P_JUMPSHORTTRUE, */
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3, /* HB_P_JUMPTRUE, */
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4, /* HB_P_JUMPFARTRUE, */
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1, /* HB_P_LESSEQUAL, */
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1, /* HB_P_LESS, */
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3, /* HB_P_LINE, */
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0, /* HB_P_LOCALNAME, */
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1, /* HB_P_MACROPOP, */
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1, /* HB_P_MACROPOPALIASED, */
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1, /* HB_P_MACROPUSH, */
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1, /* HB_P_MACROPUSHALIASED, */
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1, /* HB_P_MACROSYMBOL, */
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1, /* HB_P_MACROTEXT, */
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3, /* HB_P_MESSAGE, */
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1, /* HB_P_MINUS, */
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1, /* HB_P_MODULUS, */
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0, /* HB_P_MODULENAME, */
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/* start: pcodes generated by macro compiler */
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3, /* HB_P_MMESSAGE, */
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3, /* HB_P_MPOPALIASEDFIELD, */
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3, /* HB_P_MPOPALIASEDVAR, */
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3, /* HB_P_MPOPFIELD, */
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3, /* HB_P_MPOPMEMVAR, */
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3, /* HB_P_MPUSHALIASEDFIELD, */
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3, /* HB_P_MPUSHALIASEDVAR, */
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0, /* HB_P_MPUSHBLOCK, */
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3, /* HB_P_MPUSHFIELD, */
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3, /* HB_P_MPUSHMEMVAR, */
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3, /* HB_P_MPUSHMEMVARREF, */
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3, /* HB_P_MPUSHSYM, */
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3, /* HB_P_MPUSHVARIABLE, */
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/* end: */
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1, /* HB_P_MULT, */
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1, /* HB_P_NEGATE, */
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1, /* HB_P_NOOP, */
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1, /* HB_P_NOT, */
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1, /* HB_P_NOTEQUAL, */
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1, /* HB_P_OR, */
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4, /* HB_P_PARAMETER, */
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1, /* HB_P_PLUS, */
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1, /* HB_P_POP, */
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1, /* HB_P_POPALIAS, */
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3, /* HB_P_POPALIASEDFIELD, */
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3, /* HB_P_POPALIASEDVAR, */
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3, /* HB_P_POPFIELD, */
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3, /* HB_P_POPLOCAL, */
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3, /* HB_P_POPLOCALNEAR, */
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3, /* HB_P_POPMEMVAR, */
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3, /* HB_P_POPSTATIC, */
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3, /* HB_P_POPVARIABLE, */
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1, /* HB_P_POWER, */
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1, /* HB_P_PUSHALIAS, */
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3, /* HB_P_PUSHALIASEDFIELD, */
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3, /* HB_P_PUSHALIASEDVAR, */
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0, /* HB_P_PUSHBLOCK, */
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3, /* HB_P_PUSHFIELD, */
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2, /* HB_P_PUSHBYTE, */
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3, /* HB_P_PUSHINT, */
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3, /* HB_P_PUSHLOCAL, */
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3, /* HB_P_PUSHLOCALNEAR, */
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3, /* HB_P_PUSHLOCALREF, */
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1+sizeof(long), /* HB_P_PUSHLONG, */
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3, /* HB_P_PUSHMEMVAR, */
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3, /* HB_P_PUSHMEMVARREF, */
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1, /* HB_P_PUSHNIL, */
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1+sizeof(double), /* HB_P_PUSHDOUBLE, */
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1, /* HB_P_PUSHSELF, */
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3, /* HB_P_PUSHSTATIC, */
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3, /* HB_P_PUSHSTATICREF, */
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0, /* HB_P_PUSHSTR, */
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0, /* HB_P_PUSHSTRSHORT, */
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3, /* HB_P_PUSHSYM, */
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2, /* HB_P_PUSHSYMNEAR, */
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3, /* HB_P_PUSHVARIABLE, */
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1, /* HB_P_RETVALUE, */
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4, /* HB_P_SEQBEGIN, */
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4, /* HB_P_SEQEND, */
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1, /* HB_P_SEQRECOVER, */
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3, /* HB_P_SFRAME, */
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5, /* HB_P_STATICS, */
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1, /* HB_P_SWAPALIAS, */
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1, /* HB_P_TRUE, */
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1, /* HB_P_ZERO, */
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1 /* HB_P_ONE, */
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};
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void hb_compPCodeEval( PFUNCTION pFunc, HB_PCODE_FUNC_PTR *pFunctions, void *cargo )
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{
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ULONG ulPos = 0;
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USHORT usSkip;
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BYTE opcode;
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HB_PCODE_FUNC_PTR pCall;
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/* Make sure that table is correct */
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assert( sizeof(s_pcode_len) == HB_P_LAST_PCODE );
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while( ulPos < pFunc->lPCodePos )
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{
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opcode = pFunc->pCode[ ulPos ];
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if( opcode < HB_P_LAST_PCODE )
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{
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usSkip = s_pcode_len[ opcode ];
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pCall = pFunctions[ opcode ];
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if( pCall )
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{
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if( usSkip )
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pCall( pFunc, ulPos, cargo );
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else
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usSkip = pCall( pFunc, ulPos, cargo );
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}
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ulPos += usSkip;
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}
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else
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{
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printf( "--- Invalid opcode %i in hb_compPCodeEval() ---\n", opcode );
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++ulPos;
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}
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}
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}
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void hb_compGenPCode1( BYTE byte )
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{
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PFUNCTION pFunc = hb_comp_functions.pLast; /* get the currently defined Clipper function */
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if( ! pFunc->pCode ) /* has been created the memory block to hold the pcode ? */
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{
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pFunc->pCode = ( BYTE * ) hb_xgrab( HB_PCODE_CHUNK );
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pFunc->lPCodeSize = HB_PCODE_CHUNK;
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pFunc->lPCodePos = 0;
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}
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else if( ( pFunc->lPCodeSize - pFunc->lPCodePos ) < 1 )
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pFunc->pCode = ( BYTE * ) hb_xrealloc( pFunc->pCode, pFunc->lPCodeSize += HB_PCODE_CHUNK );
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte;
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}
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void hb_compGenPCode2( BYTE byte1, BYTE byte2 )
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{
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PFUNCTION pFunc = hb_comp_functions.pLast; /* get the currently defined Clipper function */
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if( ! pFunc->pCode ) /* has been created the memory block to hold the pcode ? */
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{
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pFunc->pCode = ( BYTE * ) hb_xgrab( HB_PCODE_CHUNK );
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pFunc->lPCodeSize = HB_PCODE_CHUNK;
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pFunc->lPCodePos = 0;
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}
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else if( ( pFunc->lPCodeSize - pFunc->lPCodePos ) < 2 )
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pFunc->pCode = ( BYTE * ) hb_xrealloc( pFunc->pCode, pFunc->lPCodeSize += HB_PCODE_CHUNK );
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte1;
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte2;
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}
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void hb_compGenPCode3( BYTE byte1, BYTE byte2, BYTE byte3 )
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{
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PFUNCTION pFunc = hb_comp_functions.pLast; /* get the currently defined Clipper function */
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if( ! pFunc->pCode ) /* has been created the memory block to hold the pcode ? */
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{
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pFunc->pCode = ( BYTE * ) hb_xgrab( HB_PCODE_CHUNK );
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pFunc->lPCodeSize = HB_PCODE_CHUNK;
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pFunc->lPCodePos = 0;
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}
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else if( ( pFunc->lPCodeSize - pFunc->lPCodePos ) < 3 )
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pFunc->pCode = ( BYTE * ) hb_xrealloc( pFunc->pCode, pFunc->lPCodeSize += HB_PCODE_CHUNK );
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte1;
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte2;
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pFunc->pCode[ pFunc->lPCodePos++ ] = byte3;
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}
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void hb_compGenPCodeN( BYTE * pBuffer, ULONG ulSize )
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{
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PFUNCTION pFunc = hb_comp_functions.pLast; /* get the currently defined Clipper function */
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if( ! pFunc->pCode ) /* has been created the memory block to hold the pcode ? */
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{
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pFunc->lPCodeSize = ( ( ulSize / HB_PCODE_CHUNK ) + 1 ) * HB_PCODE_CHUNK;
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pFunc->pCode = ( BYTE * ) hb_xgrab( pFunc->lPCodeSize );
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pFunc->lPCodePos = 0;
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}
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else if( pFunc->lPCodePos + ulSize > pFunc->lPCodeSize )
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{
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/* not enough free space in pcode buffer - increase it */
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pFunc->lPCodeSize += ( ( ( ulSize / HB_PCODE_CHUNK ) + 1 ) * HB_PCODE_CHUNK );
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pFunc->pCode = ( BYTE * ) hb_xrealloc( pFunc->pCode, pFunc->lPCodeSize );
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}
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memcpy( pFunc->pCode + pFunc->lPCodePos, pBuffer, ulSize );
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pFunc->lPCodePos += ulSize;
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}
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