parse.c_shipped

linux 内核源代码

  if (yyn <= 0)
    {
      if (yyn == 0 || yyn == YYTABLE_NINF)
	goto yyerrlab;
      yyn = -yyn;
      goto yyreduce;
    }

  if (yyn == YYFINAL)
    YYACCEPT;

  /* Count tokens shifted since error; after three, turn off error
     status.  */
  if (yyerrstatus)
    yyerrstatus--;

  /* Shift the look-ahead token.  */
  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);

  /* Discard the shifted token unless it is eof.  */
  if (yychar != YYEOF)
    yychar = YYEMPTY;

  yystate = yyn;
  *++yyvsp = yylval;

  goto yynewstate;


/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state.  |
`-----------------------------------------------------------*/
yydefault:
  yyn = yydefact[yystate];
  if (yyn == 0)
    goto yyerrlab;
  goto yyreduce;


/*-----------------------------.
| yyreduce -- Do a reduction.  |
`-----------------------------*/
yyreduce:
  /* yyn is the number of a rule to reduce with.  */
  yylen = yyr2[yyn];

  /* If YYLEN is nonzero, implement the default value of the action:
     `$$ = $1'.

     Otherwise, the following line sets YYVAL to garbage.
     This behavior is undocumented and Bison
     users should not rely upon it.  Assigning to YYVAL
     unconditionally makes the parser a bit smaller, and it avoids a
     GCC warning that YYVAL may be used uninitialized.  */
  yyval = yyvsp[1-yylen];


  YY_REDUCE_PRINT (yyn);
  switch (yyn)
    {
        case 4:
#line 108 "scripts/genksyms/parse.y"
    { is_typedef = 0; is_extern = 0; current_name = NULL; decl_spec = NULL; ;}
    break;

  case 5:
#line 110 "scripts/genksyms/parse.y"
    { free_list(*(yyvsp[(2) - (2)]), NULL); *(yyvsp[(2) - (2)]) = NULL; ;}
    break;

  case 6:
#line 114 "scripts/genksyms/parse.y"
    { is_typedef = 1; ;}
    break;

  case 7:
#line 115 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 8:
#line 116 "scripts/genksyms/parse.y"
    { is_typedef = 1; ;}
    break;

  case 9:
#line 117 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 14:
#line 122 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 15:
#line 123 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 16:
#line 128 "scripts/genksyms/parse.y"
    { if (current_name) {
		    struct string_list *decl = (*(yyvsp[(3) - (3)]))->next;
		    (*(yyvsp[(3) - (3)]))->next = NULL;
		    add_symbol(current_name,
			       is_typedef ? SYM_TYPEDEF : SYM_NORMAL,
			       decl, is_extern);
		    current_name = NULL;
		  }
		  (yyval) = (yyvsp[(3) - (3)]);
		;}
    break;

  case 17:
#line 141 "scripts/genksyms/parse.y"
    { (yyval) = NULL; ;}
    break;

  case 19:
#line 147 "scripts/genksyms/parse.y"
    { struct string_list *decl = *(yyvsp[(1) - (1)]);
		  *(yyvsp[(1) - (1)]) = NULL;
		  add_symbol(current_name,
			     is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
		  current_name = NULL;
		  (yyval) = (yyvsp[(1) - (1)]);
		;}
    break;

  case 20:
#line 155 "scripts/genksyms/parse.y"
    { struct string_list *decl = *(yyvsp[(3) - (3)]);
		  *(yyvsp[(3) - (3)]) = NULL;
		  free_list(*(yyvsp[(2) - (3)]), NULL);
		  *(yyvsp[(2) - (3)]) = decl_spec;
		  add_symbol(current_name,
			     is_typedef ? SYM_TYPEDEF : SYM_NORMAL, decl, is_extern);
		  current_name = NULL;
		  (yyval) = (yyvsp[(3) - (3)]);
		;}
    break;

  case 21:
#line 168 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]) ? (yyvsp[(4) - (4)]) : (yyvsp[(3) - (4)]) ? (yyvsp[(3) - (4)]) : (yyvsp[(2) - (4)]) ? (yyvsp[(2) - (4)]) : (yyvsp[(1) - (4)]); ;}
    break;

  case 22:
#line 173 "scripts/genksyms/parse.y"
    { decl_spec = NULL; ;}
    break;

  case 24:
#line 178 "scripts/genksyms/parse.y"
    { decl_spec = *(yyvsp[(1) - (1)]); ;}
    break;

  case 25:
#line 179 "scripts/genksyms/parse.y"
    { decl_spec = *(yyvsp[(2) - (2)]); ;}
    break;

  case 26:
#line 184 "scripts/genksyms/parse.y"
    { /* Version 2 checksumming ignores storage class, as that
		     is really irrelevant to the linkage.  */
		  remove_node((yyvsp[(1) - (1)]));
		  (yyval) = (yyvsp[(1) - (1)]);
		;}
    break;

  case 31:
#line 196 "scripts/genksyms/parse.y"
    { is_extern = 1; (yyval) = (yyvsp[(1) - (1)]); ;}
    break;

  case 32:
#line 197 "scripts/genksyms/parse.y"
    { is_extern = 0; (yyval) = (yyvsp[(1) - (1)]); ;}
    break;

  case 37:
#line 209 "scripts/genksyms/parse.y"
    { remove_node((yyvsp[(1) - (2)])); (*(yyvsp[(2) - (2)]))->tag = SYM_STRUCT; (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 38:
#line 211 "scripts/genksyms/parse.y"
    { remove_node((yyvsp[(1) - (2)])); (*(yyvsp[(2) - (2)]))->tag = SYM_UNION; (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 39:
#line 213 "scripts/genksyms/parse.y"
    { remove_node((yyvsp[(1) - (2)])); (*(yyvsp[(2) - (2)]))->tag = SYM_ENUM; (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 40:
#line 217 "scripts/genksyms/parse.y"
    { struct string_list *s = *(yyvsp[(3) - (3)]), *i = *(yyvsp[(2) - (3)]), *r;
		  r = copy_node(i); r->tag = SYM_STRUCT;
		  r->next = (*(yyvsp[(1) - (3)]))->next; *(yyvsp[(3) - (3)]) = r; (*(yyvsp[(1) - (3)]))->next = NULL;
		  add_symbol(i->string, SYM_STRUCT, s, is_extern);
		  (yyval) = (yyvsp[(3) - (3)]);
		;}
    break;

  case 41:
#line 224 "scripts/genksyms/parse.y"
    { struct string_list *s = *(yyvsp[(3) - (3)]), *i = *(yyvsp[(2) - (3)]), *r;
		  r = copy_node(i); r->tag = SYM_UNION;
		  r->next = (*(yyvsp[(1) - (3)]))->next; *(yyvsp[(3) - (3)]) = r; (*(yyvsp[(1) - (3)]))->next = NULL;
		  add_symbol(i->string, SYM_UNION, s, is_extern);
		  (yyval) = (yyvsp[(3) - (3)]);
		;}
    break;

  case 42:
#line 231 "scripts/genksyms/parse.y"
    { struct string_list *s = *(yyvsp[(3) - (3)]), *i = *(yyvsp[(2) - (3)]), *r;
		  r = copy_node(i); r->tag = SYM_ENUM;
		  r->next = (*(yyvsp[(1) - (3)]))->next; *(yyvsp[(3) - (3)]) = r; (*(yyvsp[(1) - (3)]))->next = NULL;
		  add_symbol(i->string, SYM_ENUM, s, is_extern);
		  (yyval) = (yyvsp[(3) - (3)]);
		;}
    break;

  case 43:
#line 239 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 44:
#line 240 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 45:
#line 241 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 56:
#line 255 "scripts/genksyms/parse.y"
    { (*(yyvsp[(1) - (1)]))->tag = SYM_TYPEDEF; (yyval) = (yyvsp[(1) - (1)]); ;}
    break;

  case 57:
#line 260 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]) ? (yyvsp[(2) - (2)]) : (yyvsp[(1) - (2)]); ;}
    break;

  case 58:
#line 264 "scripts/genksyms/parse.y"
    { (yyval) = NULL; ;}
    break;

  case 61:
#line 270 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 65:
#line 276 "scripts/genksyms/parse.y"
    { /* restrict has no effect in prototypes so ignore it */
		  remove_node((yyvsp[(1) - (1)]));
		  (yyval) = (yyvsp[(1) - (1)]);
		;}
    break;

  case 66:
#line 283 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 68:
#line 289 "scripts/genksyms/parse.y"
    { if (current_name != NULL) {
		    error_with_pos("unexpected second declaration name");
		    YYERROR;
		  } else {
		    current_name = (*(yyvsp[(1) - (1)]))->string;
		    (yyval) = (yyvsp[(1) - (1)]);
		  }
		;}
    break;

  case 69:
#line 298 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 70:
#line 300 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 71:
#line 302 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 72:
#line 304 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 73:
#line 306 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 74:
#line 312 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 78:
#line 320 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 79:
#line 322 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 80:
#line 324 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 81:
#line 326 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 82:
#line 328 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 83:
#line 332 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]); ;}
    break;

  case 85:
#line 334 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 86:
#line 338 "scripts/genksyms/parse.y"
    { (yyval) = NULL; ;}
    break;

  case 89:
#line 345 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(3) - (3)]); ;}
    break;

  case 90:
#line 350 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]) ? (yyvsp[(2) - (2)]) : (yyvsp[(1) - (2)]); ;}
    break;

  case 91:
#line 355 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(2) - (2)]) ? (yyvsp[(2) - (2)]) : (yyvsp[(1) - (2)]); ;}
    break;

  case 93:
#line 360 "scripts/genksyms/parse.y"
    { (yyval) = NULL; ;}
    break;

  case 94:
#line 362 "scripts/genksyms/parse.y"
    { /* For version 2 checksums, we don't want to remember
		     private parameter names.  */
		  remove_node((yyvsp[(1) - (1)]));
		  (yyval) = (yyvsp[(1) - (1)]);
		;}
    break;

  case 95:
#line 370 "scripts/genksyms/parse.y"
    { remove_node((yyvsp[(1) - (1)]));
		  (yyval) = (yyvsp[(1) - (1)]);
		;}
    break;

  case 96:
#line 374 "scripts/genksyms/parse.y"
    { (yyval) = (yyvsp[(4) - (4)]); ;}
    break;

  case 97:
#line 376 "script