pl3.tab.c

简介：PL0语言是pascal语言的一个子集。编译VC工程之前

#if YYDEBUG
  /* We have to keep this `#if YYDEBUG', since we use variables which
     are defined only if `YYDEBUG' is set.  */
  if (yydebug)
    {
      int yyi;

      YYFPRINTF (stderr, "Reducing via rule %d (line %d), ",
		 yyn, yyrline[yyn]);

      /* Print the symbols being reduced, and their result.  */
      for (yyi = yyprhs[yyn]; yyrhs[yyi] > 0; yyi++)
	YYFPRINTF (stderr, "%s ", yytname[yyrhs[yyi]]);
      YYFPRINTF (stderr, " -> %s\n", yytname[yyr1[yyn]]);
    }
#endif

  switch (yyn) {

case 2:
#line 36 "pl3.y"
{ lev++; gen(JMP, 0, 0); ;
    break;}
case 3:
#line 37 "pl3.y"
{ code[yyvsp[-4].val].a=cx; proc_dec(); ;
    break;}
case 4:
#line 38 "pl3.y"
{ gen(OPR, 0, 0); lev--; ;
    break;}
case 9:
#line 50 "pl3.y"
{ kind=constant; num=yyvsp[0].val; enter(yyvsp[-2].name); ;
    break;}
case 14:
#line 62 "pl3.y"
{ kind=variable; enter(yyvsp[0].name); ;
    break;}
case 15:
#line 63 "pl3.y"
{ kind=var_array; enter(yyvsp[-3].name);;
    break;}
case 16:
#line 66 "pl3.y"
{ dx1=yyvsp[-2].val; dx2=yyvsp[0].val;;
    break;}
case 17:
#line 69 "pl3.y"
{ yyval.val=array_bound(yyvsp[0].name); ;
    break;}
case 18:
#line 70 "pl3.y"
{ yyval.val=yyvsp[0].val;;
    break;}
case 21:
#line 78 "pl3.y"
{ kind=procedure; enter(yyvsp[0].name); ;
    break;}
case 23:
#line 79 "pl3.y"
{ kind=procedure;enter(yyvsp[0].name); ;
    break;}
case 25:
#line 82 "pl3.y"
{ kind=parameter; enter(yyvsp[0].name);;
    break;}
case 26:
#line 83 "pl3.y"
{ kind=parameter; enter(yyvsp[0].name);;
    break;}
case 27:
#line 86 "pl3.y"
{ yyval.name=yyvsp[0].name;;
    break;}
case 28:
#line 90 "pl3.y"
{yyval.val=cx; ;
    break;}
case 29:
#line 93 "pl3.y"
{yyval.val=cx;gendo(JPC,0,0);;
    break;}
case 30:
#line 96 "pl3.y"
{ yyval.val=cx; gen(JMP,0,0); code[yyvsp[-1].val].a=cx; ;
    break;}
case 33:
#line 104 "pl3.y"
{asgn_stmt(yyvsp[-2].name);;
    break;}
case 34:
#line 105 "pl3.y"
{code[yyvsp[-2].val].a=cx; ;
    break;}
case 36:
#line 107 "pl3.y"
{call_stmt(yyvsp[-1].name,yyvsp[0].val); ;
    break;}
case 37:
#line 108 "pl3.y"
{ ;
    break;}
case 38:
#line 109 "pl3.y"
{gendo(OPR, 0, 15); ;
    break;}
case 39:
#line 110 "pl3.y"
{gendo(JMP,0,yyvsp[-4].val);code[yyvsp[-2].val].a=cx; ;
    break;}
case 40:
#line 111 "pl3.y"
{gendo(JPC,0,yyvsp[-3].val);;
    break;}
case 42:
#line 115 "pl3.y"
{code[yyvsp[-1].val].a=cx; ;
    break;}
case 43:
#line 116 "pl3.y"
{code[yyvsp[-2].val].a=cx; ;
    break;}
case 44:
#line 117 "pl3.y"
{gendo(JMP,0,yyvsp[-4].val); code[yyvsp[-2].val].a=cx;;
    break;}
case 47:
#line 126 "pl3.y"
{ yyval.val=0; ;
    break;}
case 48:
#line 127 "pl3.y"
{ yyval.val=yyvsp[-1].val; ;
    break;}
case 49:
#line 131 "pl3.y"
{ yyval.name=yyvsp[0].name; ;
    break;}
case 50:
#line 132 "pl3.y"
{ yyval.name=yyvsp[-3].name; array_access(yyvsp[-3].name); ;
    break;}
case 51:
#line 135 "pl3.y"
{ read_stmt(yyvsp[0].name); ;
    break;}
case 52:
#line 136 "pl3.y"
{ read_stmt(yyvsp[0].name); ;
    break;}
case 53:
#line 140 "pl3.y"
{yyval.val=1;;
    break;}
case 54:
#line 141 "pl3.y"
{yyval.val++;;
    break;}
case 55:
#line 145 "pl3.y"
{gendo(OPR, 0, 14);;
    break;}
case 56:
#line 146 "pl3.y"
{gendo(OPR, 0, 14);;
    break;}
case 57:
#line 150 "pl3.y"
{gendo(OPR,0,6);;
    break;}
case 58:
#line 151 "pl3.y"
{exp_r_exp(yyvsp[-1].val);;
    break;}
case 59:
#line 154 "pl3.y"
{yyval.val=eql;;
    break;}
case 60:
#line 155 "pl3.y"
{yyval.val=lss;;
    break;}
case 61:
#line 156 "pl3.y"
{yyval.val=gtr;;
    break;}
case 62:
#line 157 "pl3.y"
{yyval.val=neq;;
    break;}
case 63:
#line 158 "pl3.y"
{yyval.val=leq;;
    break;}
case 64:
#line 159 "pl3.y"
{yyval.val=geq;;
    break;}
case 65:
#line 163 "pl3.y"
{operate(yyvsp[-1].val);;
    break;}
case 66:
#line 164 "pl3.y"
{operate(yyvsp[-1].val);;
    break;}
case 67:
#line 168 "pl3.y"
{yyval.val='p';;
    break;}
case 68:
#line 169 "pl3.y"
{yyval.val='n';;
    break;}
case 69:
#line 170 "pl3.y"
{yyval.val='p';;
    break;}
case 70:
#line 173 "pl3.y"
{yyval.val='+';;
    break;}
case 71:
#line 174 "pl3.y"
{yyval.val='-';;
    break;}
case 72:
#line 177 "pl3.y"
{yyval.val='*';;
    break;}
case 73:
#line 178 "pl3.y"
{yyval.val='/';;
    break;}
case 75:
#line 182 "pl3.y"
{operate(yyvsp[-1].val);;
    break;}
case 76:
#line 185 "pl3.y"
{factor_var(yyvsp[0].name);;
    break;}
case 77:
#line 186 "pl3.y"
{gendo(LIT,0,yyvsp[0].val);;
    break;}
}

#line 705 "bison.simple"


  yyvsp -= yylen;
  yyssp -= yylen;
#if YYLSP_NEEDED
  yylsp -= yylen;
#endif

#if YYDEBUG
  if (yydebug)
    {
      short *yyssp1 = yyss - 1;
      YYFPRINTF (stderr, "state stack now");
      while (yyssp1 != yyssp)
	YYFPRINTF (stderr, " %d", *++yyssp1);
      YYFPRINTF (stderr, "\n");
    }
#endif

  *++yyvsp = yyval;
#if YYLSP_NEEDED
  *++yylsp = yyloc;
#endif

  /* Now `shift' the result of the reduction.  Determine what state
     that goes to, based on the state we popped back to and the rule
     number reduced by.  */

  yyn = yyr1[yyn];

  yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
  if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
    yystate = yytable[yystate];
  else
    yystate = yydefgoto[yyn - YYNTBASE];

  goto yynewstate;


/*------------------------------------.
| yyerrlab -- here on detecting error |
`------------------------------------*/
yyerrlab:
  /* If not already recovering from an error, report this error.  */
  if (!yyerrstatus)
    {
      ++yynerrs;

#ifdef YYERROR_VERBOSE
      yyn = yypact[yystate];

      if (yyn > YYFLAG && yyn < YYLAST)
	{
	  YYSIZE_T yysize = 0;
	  char *yymsg;
	  int yyx, yycount;

	  yycount = 0;
	  /* Start YYX at -YYN if negative to avoid negative indexes in
	     YYCHECK.  */
	  for (yyx = yyn < 0 ? -yyn : 0;
	       yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
	    if (yycheck[yyx + yyn] == yyx)
	      yysize += yystrlen (yytname[yyx]) + 15, yycount++;
	  yysize += yystrlen ("parse error, unexpected ") + 1;
	  yysize += yystrlen (yytname[YYTRANSLATE (yychar)]);
	  yymsg = (char *) YYSTACK_ALLOC (yysize);
	  if (yymsg != 0)
	    {
	      char *yyp = yystpcpy (yymsg, "parse error, unexpected ");
	      yyp = yystpcpy (yyp, yytname[YYTRANSLATE (yychar)]);

	      if (yycount < 5)
		{
		  yycount = 0;
		  for (yyx = yyn < 0 ? -yyn : 0;
		       yyx < (int) (sizeof (yytname) / sizeof (char *));
		       yyx++)
		    if (yycheck[yyx + yyn] == yyx)
		      {
			const char *yyq = ! yycount ? ", expecting " : " or ";
			yyp = yystpcpy (yyp, yyq);
			yyp = yystpcpy (yyp, yytname[yyx]);
			yycount++;
		      }
		}
	      yyerror (yymsg);
	      YYSTACK_FREE (yymsg);
	    }
	  else
	    yyerror ("parse error; also virtual memory exhausted");
	}
      else
#endif /* defined (YYERROR_VERBOSE) */
	yyerror ("parse error");
    }
  goto yyerrlab1;


/*--------------------------------------------------.
| yyerrlab1 -- error raised explicitly by an action |
`--------------------------------------------------*/
yyerrlab1:
  if (yyerrstatus == 3)
    {
      /* If just tried and failed to reuse lookahead token after an
	 error, discard it.  */

      /* return failure if at end of input */
      if (yychar == YYEOF)
	YYABORT;
      YYDPRINTF ((stderr, "Discarding token %d (%s).\n",
		  yychar, yytname[yychar1]));
      yychar = YYEMPTY;
    }

  /* Else will try to reuse lookahead token after shifting the error
     token.  */

  yyerrstatus = 3;		/* Each real token shifted decrements this */

  goto yyerrhandle;


/*-------------------------------------------------------------------.
| yyerrdefault -- current state does not do anything special for the |
| error token.                                                       |
`-------------------------------------------------------------------*/
yyerrdefault:
#if 0
  /* This is wrong; only states that explicitly want error tokens
     should shift them.  */

  /* If its default is to accept any token, ok.  Otherwise pop it.  */
  yyn = yydefact[yystate];
  if (yyn)
    goto yydefault;
#endif


/*---------------------------------------------------------------.
| yyerrpop -- pop the current state because it cannot handle the |
| error token                                                    |
`---------------------------------------------------------------*/
yyerrpop:
  if (yyssp == yyss)
    YYABORT;
  yyvsp--;
  yystate = *--yyssp;
#if YYLSP_NEEDED
  yylsp--;
#endif

#if YYDEBUG
  if (yydebug)
    {
      short *yyssp1 = yyss - 1;
      YYFPRINTF (stderr, "Error: state stack now");
      while (yyssp1 != yyssp)
	YYFPRINTF (stderr, " %d", *++yyssp1);
      YYFPRINTF (stderr, "\n");
    }
#endif

/*--------------.
| yyerrhandle.  |
`--------------*/
yyerrhandle:
  yyn = yypact[yystate];
  if (yyn == YYFLAG)
    goto yyerrdefault;

  yyn += YYTERROR;
  if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
    goto yyerrdefault;

  yyn = yytable[yyn];
  if (yyn < 0)
    {
      if (yyn == YYFLAG)
	goto yyerrpop;
      yyn = -yyn;
      goto yyreduce;
    }
  else if (yyn == 0)
    goto yyerrpop;

  if (yyn == YYFINAL)
    YYACCEPT;

  YYDPRINTF ((stderr, "Shifting error token, "));

  *++yyvsp = yylval;
#if YYLSP_NEEDED
  *++yylsp = yylloc;
#endif

  yystate = yyn;
  goto yynewstate;


/*-------------------------------------.
| yyacceptlab -- YYACCEPT comes here.  |
`-------------------------------------*/
yyacceptlab:
  yyresult = 0;
  goto yyreturn;

/*-----------------------------------.
| yyabortlab -- YYABORT comes here.  |
`-----------------------------------*/
yyabortlab:
  yyresult = 1;
  goto yyreturn;

/*---------------------------------------------.
| yyoverflowab -- parser overflow comes here.  |
`---------------------------------------------*/
yyoverflowlab:
  yyerror ("parser stack overflow");
  yyresult = 2;
  /* Fall through.  */

yyreturn:
#ifndef yyoverflow
  if (yyss != yyssa)
    YYSTACK_FREE (yyss);
#endif
  return yyresult;
}
#line 189 "pl3.y"


void yyerror(char *str)
{
	if(str == "parse error")
		return;
	printf("\nError in Line %d : %s",lineno,str);
}