pidl/lib/Parse/Pidl/Samba4/Header.pm

   1 ###################################################
   2 # create C header files for an IDL structure
   3 # Copyright tridge@samba.org 2000
   4 # Copyright jelmer@samba.org 2005
   5 # released under the GNU GPL
   6
   7 package Parse::Pidl::Samba4::Header;
   8
   9 require Exporter;
  10
  11 @ISA = qw(Exporter);
  12 @EXPORT_OK = qw(GenerateFunctionInEnv GenerateFunctionOutEnv EnvSubstituteValue GenerateStructEnv);
  13
  14 use strict;
  15 use Parse::Pidl qw(fatal);
  16 use Parse::Pidl::Typelist qw(mapTypeName scalar_is_reference);
  17 use Parse::Pidl::Util qw(has_property is_constant unmake_str ParseExpr);
  18 use Parse::Pidl::Samba4 qw(is_intree ElementStars ArrayBrackets choose_header);
  19
  20 use vars qw($VERSION);
  21 $VERSION = '0.01';
  22
  23 my($res);
  24 my($tab_depth);
  25
  26 sub pidl($) { $res .= shift; }
  27
  28 sub tabs()
  29 {
  30         my $res = "";
  31         $res .="\t" foreach (1..$tab_depth);
  32         return $res;
  33 }
  34
  35 #####################################################################
  36 # parse a properties list
  37 sub HeaderProperties($$)
  38 {
  39         my($props,$ignores) = @_;
  40         my $ret = "";
  41
  42         foreach my $d (keys %{$props}) {
  43                 next if (grep(/^$d$/, @$ignores));
  44                 if($props->{$d} ne "1") {
  45                         $ret.= "$d($props->{$d}),";
  46                 } else {
  47                         $ret.="$d,";
  48                 }
  49         }
  50
  51         if ($ret) {
  52                 pidl "/* [" . substr($ret, 0, -1) . "] */";
  53         }
  54 }
  55
  56 #####################################################################
  57 # parse a structure element
  58 sub HeaderElement($)
  59 {
  60         my($element) = shift;
  61
  62         pidl tabs();
  63         if (has_property($element, "represent_as")) {
  64                 pidl mapTypeName($element->{PROPERTIES}->{represent_as})." ";
  65         } else {
  66                 if (ref($element->{TYPE}) eq "HASH") {
  67                         HeaderType($element, $element->{TYPE}, $element->{TYPE}->{NAME});
  68                 } else {
  69                         HeaderType($element, $element->{TYPE}, "");
  70                 }
  71                 pidl " ".ElementStars($element);
  72         }
  73         pidl $element->{NAME};
  74         pidl ArrayBrackets($element);
  75
  76         pidl ";";
  77         if (defined $element->{PROPERTIES}) {
  78                 HeaderProperties($element->{PROPERTIES}, ["in", "out"]);
  79         }
  80         pidl "\n";
  81 }
  82
  83 #####################################################################
  84 # parse a struct
  85 sub HeaderStruct($$;$)
  86 {
  87         my($struct,$name,$tail) = @_;
  88         pidl "struct $name";
  89         pidl $tail if defined($tail) and not defined($struct->{ELEMENTS});
  90         return if (not defined($struct->{ELEMENTS}));
  91         pidl " {\n";
  92         $tab_depth++;
  93         my $el_count=0;
  94         foreach (@{$struct->{ELEMENTS}}) {
  95                 HeaderElement($_);
  96                 $el_count++;
  97         }
  98         if ($el_count == 0) {
  99                 # some compilers can't handle empty structures
 100                 pidl tabs()."char _empty_;\n";
 101         }
 102         $tab_depth--;
 103         pidl tabs()."}";
 104         if (defined $struct->{PROPERTIES}) {
 105                 HeaderProperties($struct->{PROPERTIES}, []);
 106         }
 107         pidl $tail if defined($tail);
 108 }
 109
 110 #####################################################################
 111 # parse a enum
 112 sub HeaderEnum($$;$)
 113 {
 114         my($enum,$name,$tail) = @_;
 115         my $first = 1;
 116
 117         pidl "enum $name";
 118         if (defined($enum->{ELEMENTS})) {
 119                 pidl "\n#ifndef USE_UINT_ENUMS\n";
 120                 pidl " {\n";
 121                 $tab_depth++;
 122                 foreach my $e (@{$enum->{ELEMENTS}}) {
 123                         my @enum_els = ();
 124                         unless ($first) { pidl ",\n"; }
 125                         $first = 0;
 126                         pidl tabs();
 127                         @enum_els = split(/=/, $e);
 128                         if (@enum_els == 2) {
 129                                 pidl $enum_els[0];
 130                                 pidl "=(int)";
 131                                 pidl $enum_els[1];
 132                         } else {
 133                                 pidl $e;
 134                         }
 135                 }
 136                 pidl "\n";
 137                 $tab_depth--;
 138                 pidl "}";
 139                 pidl "\n";
 140                 pidl "#else\n";
 141                 my $count = 0;
 142                 my $with_val = 0;
 143                 my $without_val = 0;
 144                 pidl " { __donnot_use_enum_$name=0x7FFFFFFF}\n";
 145                 foreach my $e (@{$enum->{ELEMENTS}}) {
 146                         my $t = "$e";
 147                         my $name;
 148                         my $value;
 149                         if ($t =~ /(.*)=(.*)/) {
 150                                 $name = $1;
 151                                 $value = $2;
 152                                 $with_val = 1;
 153                                 fatal($e->{ORIGINAL}, "you can't mix enum member with values and without values!")
 154                                         unless ($without_val == 0);
 155                         } else {
 156                                 $name = $t;
 157                                 $value = $count++;
 158                                 $without_val = 1;
 159                                 fatal($e->{ORIGINAL}, "you can't mix enum member with values and without values!")
 160                                         unless ($with_val == 0);
 161                         }
 162                         pidl "#define $name ( $value )\n";
 163                 }
 164                 pidl "#endif\n";
 165         }
 166         pidl $tail if defined($tail);
 167 }
 168
 169 #####################################################################
 170 # parse a bitmap
 171 sub HeaderBitmap($$)
 172 {
 173         my($bitmap,$name) = @_;
 174
 175         return unless defined($bitmap->{ELEMENTS});
 176
 177         pidl "/* bitmap $name */\n";
 178         pidl "#define $_\n" foreach (@{$bitmap->{ELEMENTS}});
 179         pidl "\n";
 180 }
 181
 182 #####################################################################
 183 # parse a union
 184 sub HeaderUnion($$;$)
 185 {
 186         my($union,$name,$tail) = @_;
 187         my %done = ();
 188
 189         pidl "union $name";
 190         pidl $tail if defined($tail) and not defined($union->{ELEMENTS});
 191         return if (not defined($union->{ELEMENTS}));
 192         pidl " {\n";
 193         $tab_depth++;
 194         my $needed = 0;
 195         foreach my $e (@{$union->{ELEMENTS}}) {
 196                 if ($e->{TYPE} ne "EMPTY") {
 197                         if (! defined $done{$e->{NAME}}) {
 198                                 HeaderElement($e);
 199                         }
 200                         $done{$e->{NAME}} = 1;
 201                         $needed++;
 202                 }
 203         }
 204         if (!$needed) {
 205                 # sigh - some compilers don't like empty structures
 206                 pidl tabs()."int _dummy_element;\n";
 207         }
 208         $tab_depth--;
 209         pidl "}";
 210
 211         if (defined $union->{PROPERTIES}) {
 212                 HeaderProperties($union->{PROPERTIES}, []);
 213         }
 214         pidl $tail if defined($tail);
 215 }
 216
 217 #####################################################################
 218 # parse a type
 219 sub HeaderType($$$;$)
 220 {
 221         my($e,$data,$name,$tail) = @_;
 222         if (ref($data) eq "HASH") {
 223                 ($data->{TYPE} eq "ENUM") && HeaderEnum($data, $name, $tail);
 224                 ($data->{TYPE} eq "BITMAP") && HeaderBitmap($data, $name);
 225                 ($data->{TYPE} eq "STRUCT") && HeaderStruct($data, $name, $tail);
 226                 ($data->{TYPE} eq "UNION") && HeaderUnion($data, $name, $tail);
 227                 return;
 228         }
 229
 230         if (has_property($e, "charset")) {
 231                 pidl "const char";
 232         } else {
 233                 pidl mapTypeName($e->{TYPE});
 234         }
 235         pidl $tail if defined($tail);
 236 }
 237
 238 #####################################################################
 239 # parse a typedef
 240 sub HeaderTypedef($;$)
 241 {
 242         my($typedef,$tail) = @_;
 243         # Don't print empty "enum foo;", since some compilers don't like it.
 244         return if ($typedef->{DATA}->{TYPE} eq "ENUM" and not defined($typedef->{DATA}->{ELEMENTS}));
 245         HeaderType($typedef, $typedef->{DATA}, $typedef->{NAME}, $tail) if defined ($typedef->{DATA});
 246 }
 247
 248 #####################################################################
 249 # parse a const
 250 sub HeaderConst($)
 251 {
 252         my($const) = shift;
 253         if (!defined($const->{ARRAY_LEN}[0])) {
 254                 pidl "#define $const->{NAME}\t( $const->{VALUE} )\n";
 255         } else {
 256                 pidl "#define $const->{NAME}\t $const->{VALUE}\n";
 257         }
 258 }
 259
 260 sub ElementDirection($)
 261 {
 262         my ($e) = @_;
 263
 264         return "inout" if (has_property($e, "in") and has_property($e, "out"));
 265         return "in" if (has_property($e, "in"));
 266         return "out" if (has_property($e, "out"));
 267         return "inout";
 268 }
 269
 270 #####################################################################
 271 # parse a function
 272 sub HeaderFunctionInOut($$)
 273 {
 274         my($fn,$prop) = @_;
 275
 276         return unless defined($fn->{ELEMENTS});
 277
 278         foreach my $e (@{$fn->{ELEMENTS}}) {
 279                 HeaderElement($e) if (ElementDirection($e) eq $prop);
 280         }
 281 }
 282
 283 #####################################################################
 284 # determine if we need an "in" or "out" section
 285 sub HeaderFunctionInOut_needed($$)
 286 {
 287         my($fn,$prop) = @_;
 288
 289         return 1 if ($prop eq "out" && defined($fn->{RETURN_TYPE}));
 290
 291         return undef unless defined($fn->{ELEMENTS});
 292
 293         foreach my $e (@{$fn->{ELEMENTS}}) {
 294                 return 1 if (ElementDirection($e) eq $prop);
 295         }
 296
 297         return undef;
 298 }
 299
 300 my %headerstructs;
 301
 302 #####################################################################
 303 # parse a function
 304 sub HeaderFunction($)
 305 {
 306         my($fn) = shift;
 307
 308         return if ($headerstructs{$fn->{NAME}});
 309
 310         $headerstructs{$fn->{NAME}} = 1;
 311
 312         pidl "\nstruct $fn->{NAME} {\n";
 313         $tab_depth++;
 314         my $needed = 0;
 315
 316         if (HeaderFunctionInOut_needed($fn, "in") or
 317             HeaderFunctionInOut_needed($fn, "inout")) {
 318                 pidl tabs()."struct {\n";
 319                 $tab_depth++;
 320                 HeaderFunctionInOut($fn, "in");
 321                 HeaderFunctionInOut($fn, "inout");
 322                 $tab_depth--;
 323                 pidl tabs()."} in;\n\n";
 324                 $needed++;
 325         }
 326
 327         if (HeaderFunctionInOut_needed($fn, "out") or
 328             HeaderFunctionInOut_needed($fn, "inout")) {
 329                 pidl tabs()."struct {\n";
 330                 $tab_depth++;
 331                 HeaderFunctionInOut($fn, "out");
 332                 HeaderFunctionInOut($fn, "inout");
 333                 if (defined($fn->{RETURN_TYPE})) {
 334                         pidl tabs().mapTypeName($fn->{RETURN_TYPE}) . " result;\n";
 335                 }
 336                 $tab_depth--;
 337                 pidl tabs()."} out;\n\n";
 338                 $needed++;
 339         }
 340
 341         if (!$needed) {
 342                 # sigh - some compilers don't like empty structures
 343                 pidl tabs()."int _dummy_element;\n";
 344         }
 345
 346         $tab_depth--;
 347         pidl "};\n\n";
 348 }
 349
 350 sub HeaderImport
 351 {
 352         my @imports = @_;
 353         foreach my $import (@imports) {
 354                 $import = unmake_str($import);
 355                 $import =~ s/\.idl$//;
 356                 pidl choose_header("librpc/gen_ndr/$import\.h", "gen_ndr/$import.h") . "\n";
 357         }
 358 }
 359
 360 sub HeaderInclude
 361 {
 362         my @includes = @_;
 363         foreach (@includes) {
 364                 pidl "#include $_\n";
 365         }
 366 }
 367
 368 #####################################################################
 369 # parse the interface definitions
 370 sub HeaderInterface($)
 371 {
 372         my($interface) = shift;
 373
 374         pidl "#ifndef _HEADER_$interface->{NAME}\n";
 375         pidl "#define _HEADER_$interface->{NAME}\n\n";
 376
 377         foreach my $c (@{$interface->{CONSTS}}) {
 378                 HeaderConst($c);
 379         }
 380
 381         foreach my $t (@{$interface->{TYPES}}) {
 382                 HeaderTypedef($t, ";\n\n") if ($t->{TYPE} eq "TYPEDEF");
 383                 HeaderStruct($t, $t->{NAME}, ";\n\n") if ($t->{TYPE} eq "STRUCT");
 384                 HeaderUnion($t, $t->{NAME}, ";\n\n") if ($t->{TYPE} eq "UNION");
 385                 HeaderEnum($t, $t->{NAME}, ";\n\n") if ($t->{TYPE} eq "ENUM");
 386                 HeaderBitmap($t, $t->{NAME}) if ($t->{TYPE} eq "BITMAP");
 387         }
 388
 389         foreach my $fn (@{$interface->{FUNCTIONS}}) {
 390                 HeaderFunction($fn);
 391         }
 392
 393         pidl "#endif /* _HEADER_$interface->{NAME} */\n";
 394 }
 395
 396 sub HeaderQuote($)
 397 {
 398         my($quote) = shift;
 399
 400         pidl unmake_str($quote->{DATA}) . "\n";
 401 }
 402
 403 #####################################################################
 404 # parse a parsed IDL into a C header
 405 sub Parse($)
 406 {
 407         my($ndr) = shift;
 408         $tab_depth = 0;
 409
 410         $res = "";
 411         %headerstructs = ();
 412         pidl "/* header auto-generated by pidl */\n\n";
 413         if (!is_intree()) {
 414                 pidl "#include <util/data_blob.h>\n";
 415         }
 416         pidl "#include <stdint.h>\n";
 417         pidl "\n";
 418         # FIXME: Include this only if NTSTATUS was actually used
 419         pidl choose_header("libcli/util/ntstatus.h", "core/ntstatus.h") . "\n";
 420         pidl "\n";
 421
 422         foreach (@{$ndr}) {
 423                 ($_->{TYPE} eq "CPP_QUOTE") && HeaderQuote($_);
 424                 ($_->{TYPE} eq "INTERFACE") && HeaderInterface($_);
 425                 ($_->{TYPE} eq "IMPORT") && HeaderImport(@{$_->{PATHS}});
 426                 ($_->{TYPE} eq "INCLUDE") && HeaderInclude(@{$_->{PATHS}});
 427         }
 428
 429         return $res;
 430 }
 431
 432 sub GenerateStructEnv($$)
 433 {
 434         my ($x, $v) = @_;
 435         my %env;
 436
 437         foreach my $e (@{$x->{ELEMENTS}}) {
 438                 $env{$e->{NAME}} = "$v->$e->{NAME}";
 439         }
 440
 441         $env{"this"} = $v;
 442
 443         return \%env;
 444 }
 445
 446 sub EnvSubstituteValue($$)
 447 {
 448         my ($env,$s) = @_;
 449
 450         # Substitute the value() values in the env
 451         foreach my $e (@{$s->{ELEMENTS}}) {
 452                 next unless (defined(my $v = has_property($e, "value")));
 453
 454                 $env->{$e->{NAME}} = ParseExpr($v, $env, $e);
 455         }
 456
 457         return $env;
 458 }
 459
 460 sub GenerateFunctionInEnv($;$)
 461 {
 462         my ($fn, $base) = @_;
 463         my %env;
 464
 465         $base = "r->" unless defined($base);
 466
 467         foreach my $e (@{$fn->{ELEMENTS}}) {
 468                 if (grep (/in/, @{$e->{DIRECTION}})) {
 469                         $env{$e->{NAME}} = $base."in.$e->{NAME}";
 470                 }
 471         }
 472
 473         return \%env;
 474 }
 475
 476 sub GenerateFunctionOutEnv($;$)
 477 {
 478         my ($fn, $base) = @_;
 479         my %env;
 480
 481         $base = "r->" unless defined($base);
 482
 483         foreach my $e (@{$fn->{ELEMENTS}}) {
 484                 if (grep (/out/, @{$e->{DIRECTION}})) {
 485                         $env{$e->{NAME}} = $base."out.$e->{NAME}";
 486                 } elsif (grep (/in/, @{$e->{DIRECTION}})) {
 487                         $env{$e->{NAME}} = $base."in.$e->{NAME}";
 488                 }
 489         }
 490
 491         return \%env;
 492 }
 493
 494 1;