source/build/pidl/idl.yp

   1 ########################
   2 # IDL Parse::Yapp parser
   3 # Copyright (C) Andrew Tridgell <tridge@samba.org>
   4 # released under the GNU GPL version 2 or later
   5
   6
   7
   8 # the precedence actually doesn't matter at all for this grammer, but
   9 # by providing a precedence we reduce the number of conflicts
  10 # enormously
  11 %left   '-' '+' '&' '|' '*' '>' '.' '/' '(' ')' '[' ',' ';'
  12
  13
  14 ################
  15 # grammer
  16 %%
  17 idl:
  18         #empty  { {} }
  19         | idl interface { push(@{$_[1]}, $_[2]); $_[1] }
  20         | idl coclass { push(@{$_[1]}, $_[2]); $_[1] }
  21 ;
  22
  23 coclass: property_list 'coclass' identifier '{' interface_names '}' optional_semicolon
  24           {$_[3] => {
  25                "TYPE" => "COCLASS",
  26                "PROPERTIES" => $_[1],
  27                "NAME" => $_[3],
  28                "DATA" => $_[5],
  29                    "FILE" => $_[0]->YYData->{INPUT_FILENAME},
  30                    "LINE" => $_[0]->YYData->{LINE},
  31           }}
  32 ;
  33
  34 interface_names:
  35         #empty { {} }
  36         | interface_names 'interface' identifier ';' { push(@{$_[1]}, $_[2]); $_[1] }
  37 ;
  38
  39 interface: property_list 'interface' identifier base_interface '{' definitions '}' optional_semicolon
  40           {$_[3] => {
  41                "TYPE" => "INTERFACE",
  42                "PROPERTIES" => $_[1],
  43                "NAME" => $_[3],
  44                "BASE" => $_[4],
  45                "DATA" => $_[6],
  46                    "FILE" => $_[0]->YYData->{INPUT_FILENAME},
  47                    "LINE" => $_[0]->YYData->{LINE},
  48           }}
  49 ;
  50
  51 base_interface:
  52         #empty
  53         | ':' identifier { $_[2] }
  54 ;
  55
  56 definitions:
  57       definition              { [ $_[1] ] }
  58     | definitions definition  { push(@{$_[1]}, $_[2]); $_[1] }
  59 ;
  60
  61
  62 definition: function | const | typedef | declare
  63 ;
  64
  65 const: 'const' identifier identifier '=' anytext ';'
  66         {{
  67                      "TYPE"  => "CONST",
  68                      "DTYPE"  => $_[2],
  69                      "NAME"  => $_[3],
  70                      "VALUE" => $_[5],
  71                      "FILE" => $_[0]->YYData->{INPUT_FILENAME},
  72                      "LINE" => $_[0]->YYData->{LINE},
  73         }}
  74         | 'const' identifier identifier array_len '=' anytext ';'
  75         {{
  76                      "TYPE"  => "CONST",
  77                      "DTYPE"  => $_[2],
  78                      "NAME"  => $_[3],
  79                      "ARRAY_LEN" => $_[4],
  80                      "VALUE" => $_[6],
  81                      "FILE" => $_[0]->YYData->{INPUT_FILENAME},
  82                      "LINE" => $_[0]->YYData->{LINE},
  83         }}
  84 ;
  85
  86
  87 function: property_list type identifier '(' element_list2 ')' ';'
  88          {{
  89                 "TYPE" => "FUNCTION",
  90                 "NAME" => $_[3],
  91                 "RETURN_TYPE" => $_[2],
  92                 "PROPERTIES" => $_[1],
  93                 "ELEMENTS" => $_[5],
  94                 "FILE" => $_[0]->YYData->{INPUT_FILENAME},
  95                 "LINE" => $_[0]->YYData->{LINE},
  96           }}
  97 ;
  98
  99 declare: 'declare' property_list decl_type identifier';'
 100         {{
 101                      "TYPE" => "DECLARE",
 102                      "PROPERTIES" => $_[2],
 103                      "NAME" => $_[4],
 104                      "DATA" => $_[3],
 105                      "FILE" => $_[0]->YYData->{INPUT_FILENAME},
 106                      "LINE" => $_[0]->YYData->{LINE},
 107         }}
 108 ;
 109
 110 decl_type: decl_enum | decl_bitmap
 111 ;
 112
 113 decl_enum: 'enum'
 114         {{
 115                      "TYPE" => "ENUM"
 116         }}
 117 ;
 118
 119 decl_bitmap: 'bitmap'
 120         {{
 121                      "TYPE" => "BITMAP"
 122         }}
 123 ;
 124
 125 typedef: 'typedef' property_list type identifier array_len ';'
 126         {{
 127                      "TYPE" => "TYPEDEF",
 128                      "PROPERTIES" => $_[2],
 129                      "NAME" => $_[4],
 130                      "DATA" => $_[3],
 131                      "ARRAY_LEN" => $_[5],
 132                      "FILE" => $_[0]->YYData->{INPUT_FILENAME},
 133                      "LINE" => $_[0]->YYData->{LINE},
 134         }}
 135 ;
 136
 137 type:   struct | union | enum | bitmap | identifier
 138         | void { "void" }
 139 ;
 140
 141
 142 enum: 'enum' '{' enum_elements '}'
 143         {{
 144              "TYPE" => "ENUM",
 145                      "ELEMENTS" => $_[3]
 146         }}
 147 ;
 148
 149 enum_elements:
 150       enum_element                    { [ $_[1] ] }
 151     | enum_elements ',' enum_element  { push(@{$_[1]}, $_[3]); $_[1] }
 152 ;
 153
 154 enum_element: identifier
 155               | identifier '=' anytext { "$_[1]$_[2]$_[3]" }
 156 ;
 157
 158 bitmap: 'bitmap' '{' bitmap_elements '}'
 159         {{
 160                      "TYPE" => "BITMAP",
 161                      "ELEMENTS" => $_[3]
 162         }}
 163 ;
 164
 165 bitmap_elements:
 166       bitmap_element                    { [ $_[1] ] }
 167     | bitmap_elements ',' bitmap_element  { push(@{$_[1]}, $_[3]); $_[1] }
 168 ;
 169
 170 bitmap_element: identifier '=' anytext { "$_[1] ( $_[3] )" }
 171 ;
 172
 173 struct: 'struct' '{' element_list1 '}'
 174         {{
 175                      "TYPE" => "STRUCT",
 176                      "ELEMENTS" => $_[3]
 177         }}
 178 ;
 179
 180 empty_element: property_list ';'
 181         {{
 182                  "NAME" => "",
 183                  "TYPE" => "EMPTY",
 184                  "PROPERTIES" => $_[1],
 185                  "POINTERS" => 0,
 186                  "ARRAY_LEN" => [],
 187                  "FILE" => $_[0]->YYData->{INPUT_FILENAME},
 188                  "LINE" => $_[0]->YYData->{LINE},
 189          }}
 190 ;
 191
 192 base_or_empty: base_element ';' | empty_element;
 193
 194 optional_base_element:
 195         property_list base_or_empty { $_[2]->{PROPERTIES} = util::FlattenHash([$_[1],$_[2]->{PROPERTIES}]); $_[2] }
 196 ;
 197
 198 union_elements:
 199     #empty
 200     | union_elements optional_base_element { push(@{$_[1]}, $_[2]); $_[1] }
 201 ;
 202
 203 union: 'union' '{' union_elements '}'
 204         {{
 205                      "TYPE" => "UNION",
 206                      "ELEMENTS" => $_[3]
 207         }}
 208 ;
 209
 210 base_element: property_list type pointers identifier array_len
 211               {{
 212                            "NAME" => $_[4],
 213                            "TYPE" => $_[2],
 214                            "PROPERTIES" => $_[1],
 215                            "POINTERS" => $_[3],
 216                            "ARRAY_LEN" => $_[5],
 217                        "FILE" => $_[0]->YYData->{INPUT_FILENAME},
 218                        "LINE" => $_[0]->YYData->{LINE},
 219               }}
 220 ;
 221
 222
 223 pointers:
 224   #empty
 225    { 0 }
 226     | pointers '*'  { $_[1]+1 }
 227 ;
 228
 229 element_list1:
 230     #empty
 231     | element_list1 base_element ';' { push(@{$_[1]}, $_[2]); $_[1] }
 232 ;
 233
 234 element_list2:
 235     #empty
 236     | 'void'
 237     | base_element { [ $_[1] ] }
 238     | element_list2 ',' base_element { push(@{$_[1]}, $_[3]); $_[1] }
 239 ;
 240
 241 array_len:
 242     #empty                        { [] }
 243     | '[' ']' array_len           { push(@{$_[3]}, "*"); $_[3] }
 244     | '[' anytext ']' array_len   { push(@{$_[4]}, "$_[2]"); $_[4] }
 245 ;
 246
 247
 248 property_list:
 249     #empty
 250     | property_list '[' properties ']' { util::FlattenHash([$_[1],$_[3]]); }
 251 ;
 252
 253 properties: property          { $_[1] }
 254     | properties ',' property { util::FlattenHash([$_[1], $_[3]]); }
 255 ;
 256
 257 property: identifier                   {{ "$_[1]" => "1"     }}
 258           | identifier '(' listtext ')' {{ "$_[1]" => "$_[3]" }}
 259 ;
 260
 261 listtext:
 262     anytext
 263     | listtext ',' anytext { "$_[1] $_[3]" }
 264 ;
 265
 266 commalisttext:
 267     anytext
 268     | commalisttext ',' anytext { "$_[1],$_[3]" }
 269 ;
 270
 271 anytext:  #empty
 272     { "" }
 273     | identifier | constant | text
 274     | anytext '-' anytext  { "$_[1]$_[2]$_[3]" }
 275     | anytext '.' anytext  { "$_[1]$_[2]$_[3]" }
 276     | anytext '*' anytext  { "$_[1]$_[2]$_[3]" }
 277     | anytext '>' anytext  { "$_[1]$_[2]$_[3]" }
 278     | anytext '<' anytext  { "$_[1]$_[2]$_[3]" }
 279     | anytext '|' anytext  { "$_[1]$_[2]$_[3]" }
 280     | anytext '&' anytext  { "$_[1]$_[2]$_[3]" }
 281     | anytext '/' anytext  { "$_[1]$_[2]$_[3]" }
 282     | anytext '+' anytext  { "$_[1]$_[2]$_[3]" }
 283     | anytext '~' anytext  { "$_[1]$_[2]$_[3]" }
 284     | anytext '(' commalisttext ')' anytext  { "$_[1]$_[2]$_[3]$_[4]$_[5]" }
 285     | anytext '{' commalisttext '}' anytext  { "$_[1]$_[2]$_[3]$_[4]$_[5]" }
 286 ;
 287
 288 identifier: IDENTIFIER
 289 ;
 290
 291 constant: CONSTANT
 292 ;
 293
 294 text: TEXT { "\"$_[1]\"" }
 295 ;
 296
 297 optional_semicolon:
 298         #empty
 299         | ';'
 300 ;
 301
 302
 303 #####################################
 304 # start code
 305 %%
 306
 307 use pidl::util;
 308
 309 sub _Error {
 310     if (exists $_[0]->YYData->{ERRMSG}) {
 311                 print $_[0]->YYData->{ERRMSG};
 312                 delete $_[0]->YYData->{ERRMSG};
 313                 return;
 314         };
 315         my $line = $_[0]->YYData->{LINE};
 316         my $last_token = $_[0]->YYData->{LAST_TOKEN};
 317         my $file = $_[0]->YYData->{INPUT_FILENAME};
 318
 319         print "$file:$line: Syntax error near '$last_token'\n";
 320 }
 321
 322 sub _Lexer($)
 323 {
 324         my($parser)=shift;
 325
 326         $parser->YYData->{INPUT}
 327         or  return('',undef);
 328
 329 again:
 330         $parser->YYData->{INPUT} =~ s/^[ \t]*//;
 331
 332         for ($parser->YYData->{INPUT}) {
 333                 if (/^\#/) {
 334                         if (s/^\# (\d+) \"(.*?)\"( \d+|)//) {
 335                                 $parser->YYData->{LINE} = $1-1;
 336                                 $parser->YYData->{INPUT_FILENAME} = $2;
 337                                 goto again;
 338                         }
 339                         if (s/^\#line (\d+) \"(.*?)\"( \d+|)//) {
 340                                 $parser->YYData->{LINE} = $1-1;
 341                                 $parser->YYData->{INPUT_FILENAME} = $2;
 342                                 goto again;
 343                         }
 344                         if (s/^(\#.*)$//m) {
 345                                 goto again;
 346                         }
 347                 }
 348                 if (s/^(\n)//) {
 349                         $parser->YYData->{LINE}++;
 350                         goto again;
 351                 }
 352                 if (s/^\"(.*?)\"//) {
 353                         $parser->YYData->{LAST_TOKEN} = $1;
 354                         return('TEXT',$1);
 355                 }
 356                 if (s/^(\d+)(\W|$)/$2/) {
 357                         $parser->YYData->{LAST_TOKEN} = $1;
 358                         return('CONSTANT',$1);
 359                 }
 360                 if (s/^([\w_]+)//) {
 361                         $parser->YYData->{LAST_TOKEN} = $1;
 362                         if ($1 =~
 363                             /^(coclass|interface|const|typedef|declare|union
 364                               |struct|enum|bitmap|void)$/x) {
 365                                 return $1;
 366                         }
 367                         return('IDENTIFIER',$1);
 368                 }
 369                 if (s/^(.)//s) {
 370                         $parser->YYData->{LAST_TOKEN} = $1;
 371                         return($1,$1);
 372                 }
 373         }
 374 }
 375
 376 sub parse_idl($$)
 377 {
 378         my $self = shift;
 379         my $filename = shift;
 380
 381         my $saved_delim = $/;
 382         undef $/;
 383         my $cpp = $ENV{CPP};
 384         if (! defined $cpp) {
 385                 $cpp = "cpp"
 386         }
 387         my $data = `$cpp -D__PIDL__ -xc $filename`;
 388         $/ = $saved_delim;
 389
 390     $self->YYData->{INPUT} = $data;
 391     $self->YYData->{LINE} = 0;
 392     $self->YYData->{LAST_TOKEN} = "NONE";
 393
 394         my $idl = $self->YYParse( yylex => \&_Lexer, yyerror => \&_Error );
 395
 396         return util::CleanData($idl);
 397 }