css_syntax.c

著名的标准C＋＋的html解析器

							yyval.selector->pseudo_element = 0;
							yyval.selector->next = NULL;
						}
    break;
case 48:
#line 423 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 49:
#line 427 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_LINK; }
    break;
case 50:
#line 428 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_VISITED; }
    break;
case 51:
#line 429 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_ACTIVE; }
    break;
case 52:
#line 433 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_LINK; }
    break;
case 53:
#line 434 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_VISITED; }
    break;
case 54:
#line 435 "css_syntax.y"
{ yyval.pseudo_class = PS_CLASS_ACTIVE; }
    break;
case 55:
#line 439 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 56:
#line 443 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 57:
#line 447 "css_syntax.y"
{ yyval.pseudo_element = PS_ELEMENT_FIRST_LETTER; }
    break;
case 58:
#line 448 "css_syntax.y"
{ yyval.pseudo_element = PS_ELEMENT_FIRST_LINE; }
    break;
case 59:
#line 452 "css_syntax.y"
{
					yyval.selector = (struct selector_t*)
						malloc(sizeof(struct selector_t));
					yyval.selector->element_name = NULL;
					yyval.selector->id = NULL;
					yyval.selector->e_class = NULL;
					yyval.selector->pseudo_class = 0;
					yyval.selector->pseudo_element = PS_ELEMENT_FIRST_LETTER;
					yyval.selector->next = NULL;
				}
    break;
case 60:
#line 462 "css_syntax.y"
{
					yyval.selector = (struct selector_t*)
						malloc(sizeof(struct selector_t));
					yyval.selector->element_name = NULL;
					yyval.selector->id = NULL;
					yyval.selector->e_class = NULL;
					yyval.selector->pseudo_class = 0;
					yyval.selector->pseudo_element = PS_ELEMENT_FIRST_LINE;
					yyval.selector->next = NULL;
				}
    break;
case 61:
#line 479 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 62:
#line 483 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 63:
#line 487 "css_syntax.y"
{
								yyval.property = (struct property_t*)
									malloc(sizeof(struct property_t));
								yyval.property->name = yyvsp[-3].lexeme;
								yyval.property->val = yyvsp[-1].lexeme;
								yyval.property->important = 1;
								yyval.property->count = 0;
								yyval.property->next = NULL;
							}
    break;
case 64:
#line 496 "css_syntax.y"
{
								yyval.property = (struct property_t*)
									malloc(sizeof(struct property_t));
								yyval.property->name = yyvsp[-2].lexeme;
								yyval.property->val = yyvsp[0].lexeme;
								yyval.property->important = 0;
								yyval.property->count = 0;
								yyval.property->next = NULL;
							}
    break;
case 65:
#line 505 "css_syntax.y"
{ yyval.property = NULL; }
    break;
case 66:
#line 506 "css_syntax.y"
{
								yyval.property = NULL;
							}
    break;
case 67:
#line 512 "css_syntax.y"
{ }
    break;
case 68:
#line 516 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 69:
#line 517 "css_syntax.y"
{
							char *s = (char*) malloc (strlen(yyvsp[-2].lexeme)+strlen(yyvsp[0].lexeme)+2);
							strcpy(s, yyvsp[-2].lexeme);
							s[strlen(s)+1] = 0;
							s[strlen(s)] = yyvsp[-1].letter;
							strcat(s, yyvsp[0].lexeme);
							free(yyvsp[-2].lexeme);
							free(yyvsp[0].lexeme);
							yyval.lexeme = s;
						}
    break;
case 70:
#line 527 "css_syntax.y"
{ yyval.lexeme = yyvsp[-1].lexeme; }
    break;
case 71:
#line 531 "css_syntax.y"
{
							char *s = (char*) malloc(strlen(yyvsp[0].lexeme)+2);
							s[0] = yyvsp[-1].letter;
							s[1] = 0;
							strcat(s, yyvsp[0].lexeme);
							free(yyvsp[0].lexeme);
							yyval.lexeme = s;
						}
    break;
case 72:
#line 539 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 73:
#line 543 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 74:
#line 544 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 75:
#line 545 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 76:
#line 546 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 77:
#line 547 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 78:
#line 548 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 79:
#line 549 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 80:
#line 550 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 81:
#line 551 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 82:
#line 552 "css_syntax.y"
{ yyval.lexeme = yyvsp[0].lexeme; }
    break;
case 83:
#line 560 "css_syntax.y"
{ 
			yyval.lexeme = (char*) malloc (strlen(yyvsp[0].lexeme)+2);
			sprintf(yyval.lexeme, "#%s", yyvsp[0].lexeme);
			free(yyvsp[0].lexeme);
		}
    break;
case 84:
#line 565 "css_syntax.y"
{ 
						yyval.lexeme = (char*) malloc (strlen(yyvsp[0].lexeme)+2);
						sprintf(yyval.lexeme, "#%s", yyvsp[0].lexeme);
						free(yyvsp[0].lexeme);
					}
    break;
}

#line 705 "/usr/share/bison/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 572 "css_syntax.y"


int yyerror(char *s) {
#if YYDEBUG
	fprintf(stderr, "Error: %s\n", s);
#endif
	return 0;
}

struct selector_list_t* css_parse(const char *buffer, int buf_len) {
	struct selector_list_t *ret = NULL;
	//yydebug = 1;
	init_yylex(buffer, buf_len);
	yyparse(&ret);
	end_yylex();
	return ret;
}