pidl/lib/Parse/Pidl/NDR.pm

   1 ###################################################
   2 # Samba4 NDR info tree generator
   3 # Copyright tridge@samba.org 2000-2003
   4 # Copyright tpot@samba.org 2001
   5 # Copyright jelmer@samba.org 2004-2006
   6 # released under the GNU GPL
   7
   8 =pod
   9
  10 =head1 NAME
  11
  12 Parse::Pidl::NDR - NDR parsing information generator
  13
  14 =head1 DESCRIPTION
  15
  16 Return a table describing the order in which the parts of an element
  17 should be parsed
  18 Possible level types:
  19  - POINTER
  20  - ARRAY
  21  - SUBCONTEXT
  22  - SWITCH
  23  - DATA
  24
  25 =head1 AUTHOR
  26
  27 Jelmer Vernooij <jelmer@samba.org>
  28
  29 =cut
  30
  31 package Parse::Pidl::NDR;
  32
  33 require Exporter;
  34 use vars qw($VERSION);
  35 $VERSION = '0.01';
  36 @ISA = qw(Exporter);
  37 @EXPORT = qw(GetPrevLevel GetNextLevel ContainsDeferred ContainsString);
  38 @EXPORT_OK = qw(GetElementLevelTable ParseElement ValidElement align_type mapToScalar ParseType can_contain_deferred is_charset_array);
  39
  40 use strict;
  41 use Parse::Pidl qw(warning fatal);
  42 use Parse::Pidl::Typelist qw(hasType getType expandAlias mapScalarType);
  43 use Parse::Pidl::Util qw(has_property property_matches);
  44
  45 # Alignment of the built-in scalar types
  46 my $scalar_alignment = {
  47         'void' => 0,
  48         'char' => 1,
  49         'int8' => 1,
  50         'uint8' => 1,
  51         'int16' => 2,
  52         'uint16' => 2,
  53         'int1632' => 3,
  54         'uint1632' => 3,
  55         'int32' => 4,
  56         'uint32' => 4,
  57         'int3264' => 5,
  58         'uint3264' => 5,
  59         'hyper' => 8,
  60         'double' => 8,
  61         'pointer' => 8,
  62         'dlong' => 4,
  63         'udlong' => 4,
  64         'udlongr' => 4,
  65         'DATA_BLOB' => 4,
  66         'string' => 4,
  67         'string_array' => 4, #???
  68         'time_t' => 4,
  69         'NTTIME' => 4,
  70         'NTTIME_1sec' => 4,
  71         'NTTIME_hyper' => 8,
  72         'WERROR' => 4,
  73         'NTSTATUS' => 4,
  74         'COMRESULT' => 4,
  75         'dns_string' => 4,
  76         'nbt_string' => 4,
  77         'wrepl_nbt_name' => 4,
  78         'ipv4address' => 4,
  79         'ipv6address' => 4, #16?
  80         'dnsp_name' => 1,
  81         'dnsp_string' => 1
  82 };
  83
  84 sub GetElementLevelTable($$)
  85 {
  86         my ($e, $pointer_default) = @_;
  87
  88         my $order = [];
  89         my $is_deferred = 0;
  90         my @bracket_array = ();
  91         my @length_is = ();
  92         my @size_is = ();
  93         my $pointer_idx = 0;
  94
  95         if (has_property($e, "size_is")) {
  96                 @size_is = split /,/, has_property($e, "size_is");
  97         }
  98
  99         if (has_property($e, "length_is")) {
 100                 @length_is = split /,/, has_property($e, "length_is");
 101         }
 102
 103         if (defined($e->{ARRAY_LEN})) {
 104                 @bracket_array = @{$e->{ARRAY_LEN}};
 105         }
 106
 107         if (has_property($e, "out")) {
 108                 my $needptrs = 1;
 109
 110                 if (has_property($e, "string") and not has_property($e, "in")) { $needptrs++; }
 111                 if ($#bracket_array >= 0) { $needptrs = 0; }
 112
 113                 warning($e, "[out] argument `$e->{NAME}' not a pointer") if ($needptrs > $e->{POINTERS});
 114         }
 115
 116         # Parse the [][][][] style array stuff
 117         for my $i (0 .. $#bracket_array) {
 118                 my $d = $bracket_array[$#bracket_array - $i];
 119                 my $size = $d;
 120                 my $length = $d;
 121                 my $is_surrounding = 0;
 122                 my $is_varying = 0;
 123                 my $is_conformant = 0;
 124                 my $is_string = 0;
 125                 my $is_fixed = 0;
 126                 my $is_inline = 0;
 127
 128                 if ($d eq "*") {
 129                         $is_conformant = 1;
 130                         if ($size = shift @size_is) {
 131                                 if ($e->{POINTERS} < 1 and has_property($e, "string")) {
 132                                         $is_string = 1;
 133                                         delete($e->{PROPERTIES}->{string});
 134                                 }
 135                         } elsif ((scalar(@size_is) == 0) and has_property($e, "string")) {
 136                                 $is_string = 1;
 137                                 delete($e->{PROPERTIES}->{string});
 138                         } else {
 139                                 fatal($e, "Must specify size_is() for conformant array!")
 140                         }
 141
 142                         if (($length = shift @length_is) or $is_string) {
 143                                 $is_varying = 1;
 144                         } else {
 145                                 $length = $size;
 146                         }
 147
 148                         if ($e == $e->{PARENT}->{ELEMENTS}[-1]
 149                                 and $e->{PARENT}->{TYPE} ne "FUNCTION") {
 150                                 $is_surrounding = 1;
 151                         }
 152                 }
 153
 154                 $is_fixed = 1 if (not $is_conformant and Parse::Pidl::Util::is_constant($size));
 155                 $is_inline = 1 if (not $is_conformant and not Parse::Pidl::Util::is_constant($size));
 156
 157                 if ($i == 0 and $is_fixed and has_property($e, "string")) {
 158                         $is_fixed = 0;
 159                         $is_varying = 1;
 160                         $is_string = 1;
 161                         delete($e->{PROPERTIES}->{string});
 162                 }
 163
 164                 push (@$order, {
 165                         TYPE => "ARRAY",
 166                         SIZE_IS => $size,
 167                         LENGTH_IS => $length,
 168                         IS_DEFERRED => $is_deferred,
 169                         IS_SURROUNDING => $is_surrounding,
 170                         IS_ZERO_TERMINATED => $is_string,
 171                         IS_VARYING => $is_varying,
 172                         IS_CONFORMANT => $is_conformant,
 173                         IS_FIXED => $is_fixed,
 174                         IS_INLINE => $is_inline
 175                 });
 176         }
 177
 178         # Next, all the pointers
 179         foreach my $i (1..$e->{POINTERS}) {
 180                 my $level = "EMBEDDED";
 181                 # Top level "ref" pointers do not have a referrent identifier
 182                 $level = "TOP" if ($i == 1 and $e->{PARENT}->{TYPE} eq "FUNCTION");
 183
 184                 my $pt;
 185                 #
 186                 # Only the first level gets the pointer type from the
 187                 # pointer property, the others get them from
 188                 # the pointer_default() interface property
 189                 #
 190                 # see http://msdn2.microsoft.com/en-us/library/aa378984(VS.85).aspx
 191                 # (Here they talk about the rightmost pointer, but testing shows
 192                 #  they mean the leftmost pointer.)
 193                 #
 194                 # --metze
 195                 #
 196                 $pt = pointer_type($e);
 197                 if ($i > 1) {
 198                         $is_deferred = 1 if ($pt ne "ref" and $e->{PARENT}->{TYPE} eq "FUNCTION");
 199                         $pt = $pointer_default;
 200                 }
 201
 202                 push (@$order, {
 203                         TYPE => "POINTER",
 204                         POINTER_TYPE => $pt,
 205                         POINTER_INDEX => $pointer_idx,
 206                         IS_DEFERRED => "$is_deferred",
 207                         LEVEL => $level
 208                 });
 209
 210                 warning($e, "top-level \[out\] pointer `$e->{NAME}' is not a \[ref\] pointer")
 211                         if ($i == 1 and $pt ne "ref" and
 212                                 $e->{PARENT}->{TYPE} eq "FUNCTION" and
 213                                 not has_property($e, "in"));
 214
 215                 $pointer_idx++;
 216
 217                 # everything that follows will be deferred
 218                 $is_deferred = 1 if ($level ne "TOP");
 219
 220                 my $array_size = shift @size_is;
 221                 my $array_length;
 222                 my $is_varying;
 223                 my $is_conformant;
 224                 my $is_string = 0;
 225                 if ($array_size) {
 226                         $is_conformant = 1;
 227                         if ($array_length = shift @length_is) {
 228                                 $is_varying = 1;
 229                         } else {
 230                                 $array_length = $array_size;
 231                                 $is_varying =0;
 232                         }
 233                 }
 234
 235                 if (scalar(@size_is) == 0 and has_property($e, "string") and
 236                     $i == $e->{POINTERS}) {
 237                         $is_string = 1;
 238                         $is_varying = $is_conformant = has_property($e, "noheader")?0:1;
 239                         delete($e->{PROPERTIES}->{string});
 240                 }
 241
 242                 if ($array_size or $is_string) {
 243                         push (@$order, {
 244                                 TYPE => "ARRAY",
 245                                 SIZE_IS => $array_size,
 246                                 LENGTH_IS => $array_length,
 247                                 IS_DEFERRED => $is_deferred,
 248                                 IS_SURROUNDING => 0,
 249                                 IS_ZERO_TERMINATED => $is_string,
 250                                 IS_VARYING => $is_varying,
 251                                 IS_CONFORMANT => $is_conformant,
 252                                 IS_FIXED => 0,
 253                                 IS_INLINE => 0
 254                         });
 255
 256                         $is_deferred = 0;
 257                 }
 258         }
 259
 260         if (defined(has_property($e, "subcontext"))) {
 261                 my $hdr_size = has_property($e, "subcontext");
 262                 my $subsize = has_property($e, "subcontext_size");
 263                 if (not defined($subsize)) {
 264                         $subsize = -1;
 265                 }
 266
 267                 push (@$order, {
 268                         TYPE => "SUBCONTEXT",
 269                         HEADER_SIZE => $hdr_size,
 270                         SUBCONTEXT_SIZE => $subsize,
 271                         IS_DEFERRED => $is_deferred,
 272                         COMPRESSION => has_property($e, "compression"),
 273                 });
 274         }
 275
 276         if (my $switch = has_property($e, "switch_is")) {
 277                 push (@$order, {
 278                         TYPE => "SWITCH",
 279                         SWITCH_IS => $switch,
 280                         IS_DEFERRED => $is_deferred
 281                 });
 282         }
 283
 284         if (scalar(@size_is) > 0) {
 285                 fatal($e, "size_is() on non-array element");
 286         }
 287
 288         if (scalar(@length_is) > 0) {
 289                 fatal($e, "length_is() on non-array element");
 290         }
 291
 292         if (has_property($e, "string")) {
 293                 fatal($e, "string() attribute on non-array element");
 294         }
 295
 296         push (@$order, {
 297                 TYPE => "DATA",
 298                 DATA_TYPE => $e->{TYPE},
 299                 IS_DEFERRED => $is_deferred,
 300                 CONTAINS_DEFERRED => can_contain_deferred($e->{TYPE}),
 301                 IS_SURROUNDING => 0 #FIXME
 302         });
 303
 304         my $i = 0;
 305         foreach (@$order) { $_->{LEVEL_INDEX} = $i; $i+=1; }
 306
 307         return $order;
 308 }
 309
 310 sub GetTypedefLevelTable($$$)
 311 {
 312         my ($e, $data, $pointer_default) = @_;
 313
 314         my $order = [];
 315
 316         push (@$order, {
 317                 TYPE => "TYPEDEF"
 318         });
 319
 320         my $i = 0;
 321         foreach (@$order) { $_->{LEVEL_INDEX} = $i; $i+=1; }
 322
 323         return $order;
 324 }
 325
 326 #####################################################################
 327 # see if a type contains any deferred data
 328 sub can_contain_deferred($)
 329 {
 330         sub can_contain_deferred($);
 331         my ($type) = @_;
 332
 333         return 1 unless (hasType($type)); # assume the worst
 334
 335         $type = getType($type);
 336
 337         return 0 if (Parse::Pidl::Typelist::is_scalar($type));
 338
 339         return can_contain_deferred($type->{DATA}) if ($type->{TYPE} eq "TYPEDEF");
 340
 341         return 0 unless defined($type->{ELEMENTS});
 342
 343         foreach (@{$type->{ELEMENTS}}) {
 344                 return 1 if ($_->{POINTERS});
 345                 return 1 if (can_contain_deferred ($_->{TYPE}));
 346         }
 347
 348         return 0;
 349 }
 350
 351 sub pointer_type($)
 352 {
 353         my $e = shift;
 354
 355         return undef unless $e->{POINTERS};
 356
 357         return "ref" if (has_property($e, "ref"));
 358         return "full" if (has_property($e, "ptr"));
 359         return "sptr" if (has_property($e, "sptr"));
 360         return "unique" if (has_property($e, "unique"));
 361         return "relative" if (has_property($e, "relative"));
 362         return "relative_short" if (has_property($e, "relative_short"));
 363         return "ignore" if (has_property($e, "ignore"));
 364
 365         return undef;
 366 }
 367
 368 #####################################################################
 369 # work out the correct alignment for a structure or union
 370 sub find_largest_alignment($)
 371 {
 372         my $s = shift;
 373
 374         my $align = 1;
 375         for my $e (@{$s->{ELEMENTS}}) {
 376                 my $a = 1;
 377
 378                 if ($e->{POINTERS}) {
 379                         # this is a hack for NDR64
 380                         # the NDR layer translates this into
 381                         # an alignment of 4 for NDR and 8 for NDR64
 382                         $a = 5;
 383                 } elsif (has_property($e, "subcontext")) {
 384                         $a = 1;
 385                 } elsif (has_property($e, "transmit_as")) {
 386                         $a = align_type($e->{PROPERTIES}->{transmit_as});
 387                 } else {
 388                         $a = align_type($e->{TYPE});
 389                 }
 390
 391                 $align = $a if ($align < $a);
 392         }
 393
 394         return $align;
 395 }
 396
 397 #####################################################################
 398 # align a type
 399 sub align_type($)
 400 {
 401         sub align_type($);
 402         my ($e) = @_;
 403
 404         if (ref($e) eq "HASH" and $e->{TYPE} eq "SCALAR") {
 405                 return $scalar_alignment->{$e->{NAME}};
 406         }
 407
 408         return 0 if ($e eq "EMPTY");
 409
 410         unless (hasType($e)) {
 411             # it must be an external type - all we can do is guess
 412                 # warning($e, "assuming alignment of unknown type '$e' is 4");
 413             return 4;
 414         }
 415
 416         my $dt = getType($e);
 417
 418         if ($dt->{TYPE} eq "TYPEDEF") {
 419                 return align_type($dt->{DATA});
 420         } elsif ($dt->{TYPE} eq "CONFORMANCE") {
 421                 return $dt->{DATA}->{ALIGN};
 422         } elsif ($dt->{TYPE} eq "ENUM") {
 423                 return align_type(Parse::Pidl::Typelist::enum_type_fn($dt));
 424         } elsif ($dt->{TYPE} eq "BITMAP") {
 425                 return align_type(Parse::Pidl::Typelist::bitmap_type_fn($dt));
 426         } elsif (($dt->{TYPE} eq "STRUCT") or ($dt->{TYPE} eq "UNION")) {
 427                 # Struct/union without body: assume 4
 428                 return 4 unless (defined($dt->{ELEMENTS}));
 429                 return find_largest_alignment($dt);
 430         }
 431
 432         die("Unknown data type type $dt->{TYPE}");
 433 }
 434
 435 sub ParseElement($$)
 436 {
 437         my ($e, $pointer_default) = @_;
 438
 439         $e->{TYPE} = expandAlias($e->{TYPE});
 440
 441         if (ref($e->{TYPE}) eq "HASH") {
 442                 $e->{TYPE} = ParseType($e->{TYPE}, $pointer_default);
 443         }
 444
 445         return {
 446                 NAME => $e->{NAME},
 447                 TYPE => $e->{TYPE},
 448                 PROPERTIES => $e->{PROPERTIES},
 449                 LEVELS => GetElementLevelTable($e, $pointer_default),
 450                 REPRESENTATION_TYPE => ($e->{PROPERTIES}->{represent_as} or $e->{TYPE}),
 451                 ALIGN => align_type($e->{TYPE}),
 452                 ORIGINAL => $e
 453         };
 454 }
 455
 456 sub ParseStruct($$)
 457 {
 458         my ($struct, $pointer_default) = @_;
 459         my @elements = ();
 460         my $surrounding = undef;
 461
 462         return {
 463                 TYPE => "STRUCT",
 464                 NAME => $struct->{NAME},
 465                 SURROUNDING_ELEMENT => undef,
 466                 ELEMENTS => undef,
 467                 PROPERTIES => $struct->{PROPERTIES},
 468                 ORIGINAL => $struct,
 469                 ALIGN => undef
 470         } unless defined($struct->{ELEMENTS});
 471
 472         CheckPointerTypes($struct, $pointer_default);
 473
 474         foreach my $x (@{$struct->{ELEMENTS}})
 475         {
 476                 my $e = ParseElement($x, $pointer_default);
 477                 if ($x != $struct->{ELEMENTS}[-1] and
 478                         $e->{LEVELS}[0]->{IS_SURROUNDING}) {
 479                         fatal($x, "conformant member not at end of struct");
 480                 }
 481                 push @elements, $e;
 482         }
 483
 484         my $e = $elements[-1];
 485         if (defined($e) and defined($e->{LEVELS}[0]->{IS_SURROUNDING}) and
 486                 $e->{LEVELS}[0]->{IS_SURROUNDING}) {
 487                 $surrounding = $e;
 488         }
 489
 490         if (defined $e->{TYPE} && $e->{TYPE} eq "string"
 491             &&  property_matches($e, "flag", ".*LIBNDR_FLAG_STR_CONFORMANT.*")) {
 492                 $surrounding = $struct->{ELEMENTS}[-1];
 493         }
 494
 495         my $align = undef;
 496         if ($struct->{NAME}) {
 497                 $align = align_type($struct->{NAME});
 498         }
 499
 500         return {
 501                 TYPE => "STRUCT",
 502                 NAME => $struct->{NAME},
 503                 SURROUNDING_ELEMENT => $surrounding,
 504                 ELEMENTS => \@elements,
 505                 PROPERTIES => $struct->{PROPERTIES},
 506                 ORIGINAL => $struct,
 507                 ALIGN => $align
 508         };
 509 }
 510
 511 sub ParseUnion($$)
 512 {
 513         my ($e, $pointer_default) = @_;
 514         my @elements = ();
 515         my $hasdefault = 0;
 516         my $switch_type = has_property($e, "switch_type");
 517         unless (defined($switch_type)) { $switch_type = "uint32"; }
 518         if (has_property($e, "nodiscriminant")) { $switch_type = undef; }
 519
 520         return {
 521                 TYPE => "UNION",
 522                 NAME => $e->{NAME},
 523                 SWITCH_TYPE => $switch_type,
 524                 ELEMENTS => undef,
 525                 PROPERTIES => $e->{PROPERTIES},
 526                 HAS_DEFAULT => $hasdefault,
 527                 ORIGINAL => $e,
 528                 ALIGN => undef
 529         } unless defined($e->{ELEMENTS});
 530
 531         CheckPointerTypes($e, $pointer_default);
 532
 533         foreach my $x (@{$e->{ELEMENTS}})
 534         {
 535                 my $t;
 536                 if ($x->{TYPE} eq "EMPTY") {
 537                         $t = { TYPE => "EMPTY" };
 538                 } else {
 539                         $t = ParseElement($x, $pointer_default);
 540                 }
 541                 if (has_property($x, "default")) {
 542                         $t->{CASE} = "default";
 543                         $hasdefault = 1;
 544                 } elsif (defined($x->{PROPERTIES}->{case})) {
 545                         $t->{CASE} = "case $x->{PROPERTIES}->{case}";
 546                 } else {
 547                         die("Union element $x->{NAME} has neither default nor case property");
 548                 }
 549                 push @elements, $t;
 550         }
 551
 552         my $align = undef;
 553         if ($e->{NAME}) {
 554                 $align = align_type($e->{NAME});
 555         }
 556
 557         return {
 558                 TYPE => "UNION",
 559                 NAME => $e->{NAME},
 560                 SWITCH_TYPE => $switch_type,
 561                 ELEMENTS => \@elements,
 562                 PROPERTIES => $e->{PROPERTIES},
 563                 HAS_DEFAULT => $hasdefault,
 564                 ORIGINAL => $e,
 565                 ALIGN => $align
 566         };
 567 }
 568
 569 sub ParseEnum($$)
 570 {
 571         my ($e, $pointer_default) = @_;
 572
 573         return {
 574                 TYPE => "ENUM",
 575                 NAME => $e->{NAME},
 576                 BASE_TYPE => Parse::Pidl::Typelist::enum_type_fn($e),
 577                 ELEMENTS => $e->{ELEMENTS},
 578                 PROPERTIES => $e->{PROPERTIES},
 579                 ORIGINAL => $e
 580         };
 581 }
 582
 583 sub ParseBitmap($$)
 584 {
 585         my ($e, $pointer_default) = @_;
 586
 587         return {
 588                 TYPE => "BITMAP",
 589                 NAME => $e->{NAME},
 590                 BASE_TYPE => Parse::Pidl::Typelist::bitmap_type_fn($e),
 591                 ELEMENTS => $e->{ELEMENTS},
 592                 PROPERTIES => $e->{PROPERTIES},
 593                 ORIGINAL => $e
 594         };
 595 }
 596
 597 sub ParseType($$)
 598 {
 599         my ($d, $pointer_default) = @_;
 600
 601         my $data = {
 602                 STRUCT => \&ParseStruct,
 603                 UNION => \&ParseUnion,
 604                 ENUM => \&ParseEnum,
 605                 BITMAP => \&ParseBitmap,
 606                 TYPEDEF => \&ParseTypedef,
 607         }->{$d->{TYPE}}->($d, $pointer_default);
 608
 609         return $data;
 610 }
 611
 612 sub ParseTypedef($$)
 613 {
 614         my ($d, $pointer_default) = @_;
 615
 616         my $data;
 617
 618         if (ref($d->{DATA}) eq "HASH") {
 619                 if (defined($d->{DATA}->{PROPERTIES})
 620                     and not defined($d->{PROPERTIES})) {
 621                         $d->{PROPERTIES} = $d->{DATA}->{PROPERTIES};
 622                 }
 623
 624                 $data = ParseType($d->{DATA}, $pointer_default);
 625                 $data->{ALIGN} = align_type($d->{NAME});
 626         } else {
 627                 $data = getType($d->{DATA});
 628         }
 629
 630         return {
 631                 NAME => $d->{NAME},
 632                 TYPE => $d->{TYPE},
 633                 PROPERTIES => $d->{PROPERTIES},
 634                 LEVELS => GetTypedefLevelTable($d, $data, $pointer_default),
 635                 DATA => $data,
 636                 ORIGINAL => $d
 637         };
 638 }
 639
 640 sub ParseConst($$)
 641 {
 642         my ($ndr,$d) = @_;
 643
 644         return $d;
 645 }
 646
 647 sub ParseFunction($$$)
 648 {
 649         my ($ndr,$d,$opnum) = @_;
 650         my @elements = ();
 651         my $rettype = undef;
 652         my $thisopnum = undef;
 653
 654         CheckPointerTypes($d, "ref");
 655
 656         if (not defined($d->{PROPERTIES}{noopnum})) {
 657                 $thisopnum = ${$opnum};
 658                 ${$opnum}++;
 659         }
 660
 661         foreach my $x (@{$d->{ELEMENTS}}) {
 662                 my $e = ParseElement($x, $ndr->{PROPERTIES}->{pointer_default});
 663                 push (@{$e->{DIRECTION}}, "in") if (has_property($x, "in"));
 664                 push (@{$e->{DIRECTION}}, "out") if (has_property($x, "out"));
 665
 666                 push (@elements, $e);
 667         }
 668
 669         if ($d->{RETURN_TYPE} ne "void") {
 670                 $rettype = expandAlias($d->{RETURN_TYPE});
 671         }
 672
 673         return {
 674                         NAME => $d->{NAME},
 675                         TYPE => "FUNCTION",
 676                         OPNUM => $thisopnum,
 677                         RETURN_TYPE => $rettype,
 678                         PROPERTIES => $d->{PROPERTIES},
 679                         ELEMENTS => \@elements,
 680                         ORIGINAL => $d
 681                 };
 682 }
 683
 684 sub CheckPointerTypes($$)
 685 {
 686         my ($s,$default) = @_;
 687
 688         return unless defined($s->{ELEMENTS});
 689
 690         foreach my $e (@{$s->{ELEMENTS}}) {
 691                 if ($e->{POINTERS} and not defined(pointer_type($e))) {
 692                         $e->{PROPERTIES}->{$default} = '1';
 693                 }
 694         }
 695 }
 696
 697 sub FindNestedTypes($$)
 698 {
 699         sub FindNestedTypes($$);
 700         my ($l, $t) = @_;
 701
 702         return unless defined($t->{ELEMENTS});
 703         return if ($t->{TYPE} eq "ENUM");
 704         return if ($t->{TYPE} eq "BITMAP");
 705
 706         foreach (@{$t->{ELEMENTS}}) {
 707                 if (ref($_->{TYPE}) eq "HASH") {
 708                         push (@$l, $_->{TYPE}) if (defined($_->{TYPE}->{NAME}));
 709                         FindNestedTypes($l, $_->{TYPE});
 710                 }
 711         }
 712 }
 713
 714 sub ParseInterface($)
 715 {
 716         my $idl = shift;
 717         my @types = ();
 718         my @consts = ();
 719         my @functions = ();
 720         my @endpoints;
 721         my $opnum = 0;
 722         my $version;
 723
 724         if (not has_property($idl, "pointer_default")) {
 725                 # MIDL defaults to "ptr" in DCE compatible mode (/osf)
 726                 # and "unique" in Microsoft Extensions mode (default)
 727                 $idl->{PROPERTIES}->{pointer_default} = "unique";
 728         }
 729
 730         foreach my $d (@{$idl->{DATA}}) {
 731                 if ($d->{TYPE} eq "FUNCTION") {
 732                         push (@functions, ParseFunction($idl, $d, \$opnum));
 733                 } elsif ($d->{TYPE} eq "CONST") {
 734                         push (@consts, ParseConst($idl, $d));
 735                 } else {
 736                         push (@types, ParseType($d, $idl->{PROPERTIES}->{pointer_default}));
 737                         FindNestedTypes(\@types, $d);
 738                 }
 739         }
 740
 741         $version = "0.0";
 742
 743         if(defined $idl->{PROPERTIES}->{version}) {
 744                 my @if_version = split(/\./, $idl->{PROPERTIES}->{version});
 745                 if ($if_version[0] == $idl->{PROPERTIES}->{version}) {
 746                                 $version = $idl->{PROPERTIES}->{version};
 747                 } else {
 748                                 $version = $if_version[1] << 16 | $if_version[0];
 749                 }
 750         }
 751
 752         # If no endpoint is set, default to the interface name as a named pipe
 753         if (!defined $idl->{PROPERTIES}->{endpoint}) {
 754                 push @endpoints, "\"ncacn_np:[\\\\pipe\\\\" . $idl->{NAME} . "]\"";
 755         } else {
 756                 @endpoints = split /,/, $idl->{PROPERTIES}->{endpoint};
 757         }
 758
 759         return {
 760                 NAME => $idl->{NAME},
 761                 UUID => lc(has_property($idl, "uuid")),
 762                 VERSION => $version,
 763                 TYPE => "INTERFACE",
 764                 PROPERTIES => $idl->{PROPERTIES},
 765                 FUNCTIONS => \@functions,
 766                 CONSTS => \@consts,
 767                 TYPES => \@types,
 768                 ENDPOINTS => \@endpoints
 769         };
 770 }
 771
 772 # Convert a IDL tree to a NDR tree
 773 # Gives a result tree describing all that's necessary for easily generating
 774 # NDR parsers / generators
 775 sub Parse($)
 776 {
 777         my $idl = shift;
 778
 779         return undef unless (defined($idl));
 780
 781         Parse::Pidl::NDR::Validate($idl);
 782
 783         my @ndr = ();
 784
 785         foreach (@{$idl}) {
 786                 ($_->{TYPE} eq "CPP_QUOTE") && push(@ndr, $_);
 787                 ($_->{TYPE} eq "INTERFACE") && push(@ndr, ParseInterface($_));
 788                 ($_->{TYPE} eq "IMPORT") && push(@ndr, $_);
 789         }
 790
 791         return \@ndr;
 792 }
 793
 794 sub GetNextLevel($$)
 795 {
 796         my $e = shift;
 797         my $fl = shift;
 798
 799         my $seen = 0;
 800
 801         foreach my $l (@{$e->{LEVELS}}) {
 802                 return $l if ($seen);
 803                 ($seen = 1) if ($l == $fl);
 804         }
 805
 806         return undef;
 807 }
 808
 809 sub GetPrevLevel($$)
 810 {
 811         my ($e,$fl) = @_;
 812         my $prev = undef;
 813
 814         foreach my $l (@{$e->{LEVELS}}) {
 815                 (return $prev) if ($l == $fl);
 816                 $prev = $l;
 817         }
 818
 819         return undef;
 820 }
 821
 822 sub ContainsString($)
 823 {
 824         my ($e) = @_;
 825
 826         foreach my $l (@{$e->{LEVELS}}) {
 827                 return 1 if ($l->{TYPE} eq "ARRAY" and $l->{IS_ZERO_TERMINATED});
 828         }
 829
 830         return 0;
 831 }
 832
 833 sub ContainsDeferred($$)
 834 {
 835         my ($e,$l) = @_;
 836
 837         return 1 if ($l->{CONTAINS_DEFERRED});
 838
 839         while ($l = GetNextLevel($e,$l))
 840         {
 841                 return 1 if ($l->{IS_DEFERRED});
 842                 return 1 if ($l->{CONTAINS_DEFERRED});
 843         }
 844
 845         return 0;
 846 }
 847
 848 sub el_name($)
 849 {
 850         my $e = shift;
 851         my $name = "<ANONYMOUS>";
 852
 853         $name = $e->{NAME} if defined($e->{NAME});
 854
 855         if (defined($e->{PARENT}) and defined($e->{PARENT}->{NAME})) {
 856                 return "$e->{PARENT}->{NAME}.$name";
 857         }
 858
 859         if (defined($e->{PARENT}) and
 860             defined($e->{PARENT}->{PARENT}) and
 861             defined($e->{PARENT}->{PARENT}->{NAME})) {
 862                 return "$e->{PARENT}->{PARENT}->{NAME}.$name";
 863         }
 864
 865         return $name;
 866 }
 867
 868 ###################################
 869 # find a sibling var in a structure
 870 sub find_sibling($$)
 871 {
 872         my($e,$name) = @_;
 873         my($fn) = $e->{PARENT};
 874
 875         if ($name =~ /\*(.*)/) {
 876                 $name = $1;
 877         }
 878
 879         for my $e2 (@{$fn->{ELEMENTS}}) {
 880                 return $e2 if ($e2->{NAME} eq $name);
 881         }
 882
 883         return undef;
 884 }
 885
 886 my %property_list = (
 887         # interface
 888         "helpstring"            => ["INTERFACE", "FUNCTION"],
 889         "version"               => ["INTERFACE"],
 890         "uuid"                  => ["INTERFACE"],
 891         "endpoint"              => ["INTERFACE"],
 892         "pointer_default"       => ["INTERFACE"],
 893         "helper"                => ["INTERFACE"],
 894         "pyhelper"              => ["INTERFACE"],
 895         "authservice"           => ["INTERFACE"],
 896         "restricted"            => ["INTERFACE"],
 897         "no_srv_register"       => ["INTERFACE"],
 898
 899         # dcom
 900         "object"                => ["INTERFACE"],
 901         "local"                 => ["INTERFACE", "FUNCTION"],
 902         "iid_is"                => ["ELEMENT"],
 903         "call_as"               => ["FUNCTION"],
 904         "idempotent"            => ["FUNCTION"],
 905
 906         # function
 907         "noopnum"               => ["FUNCTION"],
 908         "in"                    => ["ELEMENT"],
 909         "out"                   => ["ELEMENT"],
 910
 911         # pointer
 912         "ref"                   => ["ELEMENT", "TYPEDEF"],
 913         "ptr"                   => ["ELEMENT", "TYPEDEF"],
 914         "unique"                => ["ELEMENT", "TYPEDEF"],
 915         "ignore"                => ["ELEMENT"],
 916         "relative"              => ["ELEMENT", "TYPEDEF"],
 917         "relative_short"        => ["ELEMENT", "TYPEDEF"],
 918         "null_is_ffffffff"      => ["ELEMENT"],
 919         "relative_base"         => ["TYPEDEF", "STRUCT", "UNION"],
 920
 921         "gensize"               => ["TYPEDEF", "STRUCT", "UNION"],
 922         "value"                 => ["ELEMENT"],
 923         "flag"                  => ["ELEMENT", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 924
 925         # generic
 926         "public"                => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 927         "nopush"                => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 928         "nopull"                => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 929         "nosize"                => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 930         "noprint"               => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP", "ELEMENT"],
 931         "nopython"              => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
 932         "todo"                  => ["FUNCTION"],
 933
 934         # union
 935         "switch_is"             => ["ELEMENT"],
 936         "switch_type"           => ["ELEMENT", "UNION"],
 937         "nodiscriminant"        => ["UNION"],
 938         "case"                  => ["ELEMENT"],
 939         "default"               => ["ELEMENT"],
 940
 941         "represent_as"          => ["ELEMENT"],
 942         "transmit_as"           => ["ELEMENT"],
 943
 944         # subcontext
 945         "subcontext"            => ["ELEMENT"],
 946         "subcontext_size"       => ["ELEMENT"],
 947         "compression"           => ["ELEMENT"],
 948
 949         # enum
 950         "enum8bit"              => ["ENUM"],
 951         "enum16bit"             => ["ENUM"],
 952         "v1_enum"               => ["ENUM"],
 953
 954         # bitmap
 955         "bitmap8bit"            => ["BITMAP"],
 956         "bitmap16bit"           => ["BITMAP"],
 957         "bitmap32bit"           => ["BITMAP"],
 958         "bitmap64bit"           => ["BITMAP"],
 959
 960         # array
 961         "range"                 => ["ELEMENT", "PIPE"],
 962         "size_is"               => ["ELEMENT"],
 963         "string"                => ["ELEMENT"],
 964         "noheader"              => ["ELEMENT"],
 965         "charset"               => ["ELEMENT"],
 966         "length_is"             => ["ELEMENT"],
 967 );
 968
 969 #####################################################################
 970 # check for unknown properties
 971 sub ValidProperties($$)
 972 {
 973         my ($e,$t) = @_;
 974
 975         return unless defined $e->{PROPERTIES};
 976
 977         foreach my $key (keys %{$e->{PROPERTIES}}) {
 978                 warning($e, el_name($e) . ": unknown property '$key'")
 979                         unless defined($property_list{$key});
 980
 981                 fatal($e, el_name($e) . ": property '$key' not allowed on '$t'")
 982                         unless grep(/^$t$/, @{$property_list{$key}});
 983         }
 984 }
 985
 986 sub mapToScalar($)
 987 {
 988         sub mapToScalar($);
 989         my $t = shift;
 990         return $t->{NAME} if (ref($t) eq "HASH" and $t->{TYPE} eq "SCALAR");
 991         my $ti = getType($t);
 992
 993         if (not defined ($ti)) {
 994                 return undef;
 995         } elsif ($ti->{TYPE} eq "TYPEDEF") {
 996                 return mapToScalar($ti->{DATA});
 997         } elsif ($ti->{TYPE} eq "ENUM") {
 998                 return Parse::Pidl::Typelist::enum_type_fn($ti);
 999         } elsif ($ti->{TYPE} eq "BITMAP") {
1000                 return Parse::Pidl::Typelist::bitmap_type_fn($ti);
1001         }
1002
1003         return undef;
1004 }
1005
1006 #####################################################################
1007 # validate an element
1008 sub ValidElement($)
1009 {
1010         my $e = shift;
1011
1012         ValidProperties($e,"ELEMENT");
1013
1014         # Check whether switches are used correctly.
1015         if (my $switch = has_property($e, "switch_is")) {
1016                 my $e2 = find_sibling($e, $switch);
1017                 my $type = getType($e->{TYPE});
1018
1019                 if (defined($type) and $type->{DATA}->{TYPE} ne "UNION") {
1020                         fatal($e, el_name($e) . ": switch_is() used on non-union type $e->{TYPE} which is a $type->{DATA}->{TYPE}");
1021                 }
1022
1023                 if (not has_property($type->{DATA}, "nodiscriminant") and defined($e2)) {
1024                         my $discriminator_type = has_property($type->{DATA}, "switch_type");
1025                         $discriminator_type = "uint32" unless defined ($discriminator_type);
1026
1027                         my $t1 = mapScalarType(mapToScalar($discriminator_type));
1028
1029                         if (not defined($t1)) {
1030                                 fatal($e, el_name($e) . ": unable to map discriminator type '$discriminator_type' to scalar");
1031                         }
1032
1033                         my $t2 = mapScalarType(mapToScalar($e2->{TYPE}));
1034                         if (not defined($t2)) {
1035                                 fatal($e, el_name($e) . ": unable to map variable used for switch_is() to scalar");
1036                         }
1037
1038                         if ($t1 ne $t2) {
1039                                 warning($e, el_name($e) . ": switch_is() is of type $e2->{TYPE} ($t2), while discriminator type for union $type->{NAME} is $discriminator_type ($t1)");
1040                         }
1041                 }
1042         }
1043
1044         if (has_property($e, "subcontext") and has_property($e, "represent_as")) {
1045                 fatal($e, el_name($e) . " : subcontext() and represent_as() can not be used on the same element");
1046         }
1047
1048         if (has_property($e, "subcontext") and has_property($e, "transmit_as")) {
1049                 fatal($e, el_name($e) . " : subcontext() and transmit_as() can not be used on the same element");
1050         }
1051
1052         if (has_property($e, "represent_as") and has_property($e, "transmit_as")) {
1053                 fatal($e, el_name($e) . " : represent_as() and transmit_as() can not be used on the same element");
1054         }
1055
1056         if (has_property($e, "represent_as") and has_property($e, "value")) {
1057                 fatal($e, el_name($e) . " : represent_as() and value() can not be used on the same element");
1058         }
1059
1060         if (has_property($e, "subcontext")) {
1061                 warning($e, "subcontext() is deprecated. Use represent_as() or transmit_as() instead");
1062         }
1063
1064         if (defined (has_property($e, "subcontext_size")) and not defined(has_property($e, "subcontext"))) {
1065                 fatal($e, el_name($e) . " : subcontext_size() on non-subcontext element");
1066         }
1067
1068         if (defined (has_property($e, "compression")) and not defined(has_property($e, "subcontext"))) {
1069                 fatal($e, el_name($e) . " : compression() on non-subcontext element");
1070         }
1071
1072         if (!$e->{POINTERS} && (
1073                 has_property($e, "ptr") or
1074                 has_property($e, "unique") or
1075                 has_property($e, "relative") or
1076                 has_property($e, "relative_short") or
1077                 has_property($e, "ref"))) {
1078                 fatal($e, el_name($e) . " : pointer properties on non-pointer element\n");
1079         }
1080 }
1081
1082 #####################################################################
1083 # validate an enum
1084 sub ValidEnum($)
1085 {
1086         my ($enum) = @_;
1087
1088         ValidProperties($enum, "ENUM");
1089 }
1090
1091 #####################################################################
1092 # validate a bitmap
1093 sub ValidBitmap($)
1094 {
1095         my ($bitmap) = @_;
1096
1097         ValidProperties($bitmap, "BITMAP");
1098 }
1099
1100 #####################################################################
1101 # validate a struct
1102 sub ValidStruct($)
1103 {
1104         my($struct) = shift;
1105
1106         ValidProperties($struct, "STRUCT");
1107
1108         return unless defined($struct->{ELEMENTS});
1109
1110         foreach my $e (@{$struct->{ELEMENTS}}) {
1111                 $e->{PARENT} = $struct;
1112                 ValidElement($e);
1113         }
1114 }
1115
1116 #####################################################################
1117 # parse a union
1118 sub ValidUnion($)
1119 {
1120         my($union) = shift;
1121
1122         ValidProperties($union,"UNION");
1123
1124         if (has_property($union->{PARENT}, "nodiscriminant") and
1125                 has_property($union->{PARENT}, "switch_type")) {
1126                 fatal($union->{PARENT}, $union->{PARENT}->{NAME} . ": switch_type(" . $union->{PARENT}->{PROPERTIES}->{switch_type} . ") on union without discriminant");
1127         }
1128
1129         return unless defined($union->{ELEMENTS});
1130
1131         foreach my $e (@{$union->{ELEMENTS}}) {
1132                 $e->{PARENT} = $union;
1133
1134                 if (defined($e->{PROPERTIES}->{default}) and
1135                         defined($e->{PROPERTIES}->{case})) {
1136                         fatal($e, "Union member $e->{NAME} can not have both default and case properties!");
1137                 }
1138
1139                 unless (defined ($e->{PROPERTIES}->{default}) or
1140                                 defined ($e->{PROPERTIES}->{case})) {
1141                         fatal($e, "Union member $e->{NAME} must have default or case property");
1142                 }
1143
1144                 if (has_property($e, "ref")) {
1145                         fatal($e, el_name($e) . ": embedded ref pointers are not supported yet\n");
1146                 }
1147
1148
1149                 ValidElement($e);
1150         }
1151 }
1152
1153 #####################################################################
1154 # validate a pipe
1155 sub ValidPipe($)
1156 {
1157         my ($pipe) = @_;
1158         my $data = $pipe->{DATA};
1159
1160         ValidProperties($pipe, "PIPE");
1161
1162         fatal($pipe, $pipe->{NAME} . ": 'pipe' is not yet supported by pidl");
1163 }
1164
1165 #####################################################################
1166 # parse a typedef
1167 sub ValidTypedef($)
1168 {
1169         my($typedef) = shift;
1170         my $data = $typedef->{DATA};
1171
1172         ValidProperties($typedef, "TYPEDEF");
1173
1174         return unless (ref($data) eq "HASH");
1175
1176         $data->{PARENT} = $typedef;
1177
1178         $data->{FILE} = $typedef->{FILE} unless defined($data->{FILE});
1179         $data->{LINE} = $typedef->{LINE} unless defined($data->{LINE});
1180
1181         ValidType($data);
1182 }
1183
1184 #####################################################################
1185 # validate a function
1186 sub ValidFunction($)
1187 {
1188         my($fn) = shift;
1189
1190         ValidProperties($fn,"FUNCTION");
1191
1192         foreach my $e (@{$fn->{ELEMENTS}}) {
1193                 $e->{PARENT} = $fn;
1194                 if (has_property($e, "ref") && !$e->{POINTERS}) {
1195                         fatal($e, "[ref] variables must be pointers ($fn->{NAME}/$e->{NAME})");
1196                 }
1197                 ValidElement($e);
1198         }
1199 }
1200
1201 #####################################################################
1202 # validate a type
1203 sub ValidType($)
1204 {
1205         my ($t) = @_;
1206
1207         {
1208                 TYPEDEF => \&ValidTypedef,
1209                 STRUCT => \&ValidStruct,
1210                 UNION => \&ValidUnion,
1211                 ENUM => \&ValidEnum,
1212                 BITMAP => \&ValidBitmap,
1213                 PIPE => \&ValidPipe
1214         }->{$t->{TYPE}}->($t);
1215 }
1216
1217 #####################################################################
1218 # parse the interface definitions
1219 sub ValidInterface($)
1220 {
1221         my($interface) = shift;
1222         my($data) = $interface->{DATA};
1223
1224         if (has_property($interface, "helper")) {
1225                 warning($interface, "helper() is pidl-specific and deprecated. Use `include' instead");
1226         }
1227
1228         ValidProperties($interface,"INTERFACE");
1229
1230         if (has_property($interface, "pointer_default")) {
1231                 if (not grep (/$interface->{PROPERTIES}->{pointer_default}/,
1232                                         ("ref", "unique", "ptr"))) {
1233                         fatal($interface, "Unknown default pointer type `$interface->{PROPERTIES}->{pointer_default}'");
1234                 }
1235         }
1236
1237         if (has_property($interface, "object")) {
1238                 if (has_property($interface, "version") &&
1239                         $interface->{PROPERTIES}->{version} != 0) {
1240                         fatal($interface, "Object interfaces must have version 0.0 ($interface->{NAME})");
1241                 }
1242
1243                 if (!defined($interface->{BASE}) &&
1244                         not ($interface->{NAME} eq "IUnknown")) {
1245                         fatal($interface, "Object interfaces must all derive from IUnknown ($interface->{NAME})");
1246                 }
1247         }
1248
1249         foreach my $d (@{$data}) {
1250                 ($d->{TYPE} eq "FUNCTION") && ValidFunction($d);
1251                 ($d->{TYPE} eq "TYPEDEF" or
1252                  $d->{TYPE} eq "STRUCT" or
1253                  $d->{TYPE} eq "UNION" or
1254                  $d->{TYPE} eq "ENUM" or
1255                  $d->{TYPE} eq "BITMAP" or
1256                  $d->{TYPE} eq "PIPE") && ValidType($d);
1257         }
1258
1259 }
1260
1261 #####################################################################
1262 # Validate an IDL structure
1263 sub Validate($)
1264 {
1265         my($idl) = shift;
1266
1267         foreach my $x (@{$idl}) {
1268                 ($x->{TYPE} eq "INTERFACE") &&
1269                     ValidInterface($x);
1270                 ($x->{TYPE} eq "IMPORTLIB") &&
1271                         fatal($x, "importlib() not supported");
1272         }
1273 }
1274
1275 sub is_charset_array($$)
1276 {
1277         my ($e,$l) = @_;
1278
1279         return 0 if ($l->{TYPE} ne "ARRAY");
1280
1281         my $nl = GetNextLevel($e,$l);
1282
1283         return 0 unless ($nl->{TYPE} eq "DATA");
1284
1285         return has_property($e, "charset");
1286 }
1287
1288
1289
1290 1;