idlcomp/languages/c++/main.cc

   1 // idlcomp/languages/c++/main.cc -- C++ IDL binding
   2 //
   3 // This software is copyright (c) 2006 Scott Wood <scott@buserror.net>.
   4 //
   5 // This software is provided 'as-is', without any express or implied warranty.
   6 // In no event will the authors or contributors be held liable for any damages
   7 // arising from the use of this software.
   8 //
   9 // Permission is hereby granted to everyone, free of charge, to use, copy,
  10 // modify, prepare derivative works of, publish, distribute, perform,
  11 // sublicense, and/or sell copies of the Software, provided that the above
  12 // copyright notice and disclaimer of warranty be included in all copies or
  13 // substantial portions of this software.
  14
  15 // FIXME: escape C++ reserved words
  16
  17 #include <cerrno>
  18
  19 #include <sys/types.h>
  20 #include <sys/stat.h>
  21
  22 #include <targets.h>
  23 #include "c++.h"
  24
  25 CPPBinding cppbinding;
  26
  27 CPPFile::CPPFile(UserNameSpace *NS, const char *dir) :
  28 dirname(dir)
  29 {
  30         indent.indent_level = 0;
  31         indent.align_spaces = 0;
  32         do_extra_newline = true;
  33         ns = NS;
  34
  35         dirname.append(1, '/');
  36         dirname.append(ns->name);
  37         string headername(dirname);
  38         headername.append(".h");
  39
  40         file.open(headername.c_str());
  41         if (!file.is_open()) {
  42                 fprintf(stderr, "Could not create output file \"%s\": %s.\n",
  43                         headername.c_str(), strerror(errno));
  44
  45                 throw UserError();
  46         }
  47
  48         if (mkdir(dirname.c_str(), 0777) < 0) {
  49                 fprintf(stderr, "Could not create output directory \"%s\": %s.\n",
  50                         dir, strerror(errno));
  51
  52                 throw UserError();
  53         }
  54
  55         file <<   "// " << *ns->get_fq_name()->flatten()
  56              << "\n// This is a C++ language binding generated by idlc.\n"
  57              <<   "// Do not modify this file directly.\n\n";
  58
  59         fqname = ns->get_fq_name();
  60         String *fqname_flat = ns->get_fq_name()->flatten("_IDLNS_");
  61         file <<   "#ifndef IDL_HDR_" << *fqname_flat
  62              << "\n#define IDL_HDR_" << *fqname_flat << "\n\n";
  63
  64         file << "#include <orb.h>\n";
  65
  66         first_traversal = ++traversal;
  67         assert(first_traversal >= 0);
  68
  69         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
  70                 Symbol *sym = (*i).second;
  71                 UserNameSpace *uns = dynamic_cast<UserNameSpace *>(sym);
  72
  73                 if (uns) {
  74                         file << "#include \"" << **ns->name << '/' << **uns->name << ".h\"\n";
  75
  76                         // Process namespaces first, to minimize duplicate definitions
  77                         // if this namespace depends on something declared in a sub
  78                         // namespace.
  79
  80                         output(uns);
  81                 }
  82         }
  83
  84         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
  85                 Symbol *sym = (*i).second;
  86                 UserNameSpace *uns = dynamic_cast<UserNameSpace *>(sym);
  87
  88                 if (!uns)
  89                         output_pass(sym, trav_nsdecl);
  90         }
  91
  92         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
  93                 Symbol *sym = (*i).second;
  94                 UserNameSpace *uns = dynamic_cast<UserNameSpace *>(sym);
  95
  96                 if (!uns)
  97                         output_pass(sym, trav_full);
  98         }
  99 }
 100
 101 CPPFile::~CPPFile()
 102 {
 103         file << "#endif\n";
 104
 105         assert(indent.indent_level == 0);
 106 }
 107
 108 void CPPFile::ifndef_in(Symbol *sym, const char *extra)
 109 {
 110         StrList *fqname = sym->get_fq_name();
 111         String *fqname_flat = fqname->flatten("_IDLNS_");
 112
 113         assert(indent.indent_level == 0);
 114
 115         file << "\n#ifndef IDL_DUP_" << extra << *fqname_flat
 116              << "\n#define IDL_DUP_" << extra << *fqname_flat << "\n";
 117 }
 118
 119 void CPPFile::ifndef_out()
 120 {
 121         file << "\n#endif\n";
 122 }
 123
 124 void CPPFile::ns_in(Symbol *sym, const char *extra)
 125 {
 126         // Only output user namespaces here; if we're defining a nested type,
 127         // it will have been forward declared already, and thus the
 128         // non-user-namespaces can be specified directly in the definition.
 129         //
 130         // For non-forward-declarables such as metadata, use all_ns_in.
 131
 132         StrList *ns_fqname = sym->find_toplevel_type()->get_ns()->get_fq_name();
 133
 134         ifndef_in(sym, extra);
 135
 136         for (StrList::const_iterator i = ns_fqname->begin();
 137              i != ns_fqname->end(); ++i) {
 138                 const String *str = *i;
 139                 file << "namespace " << *str << " {\n";
 140         }
 141
 142         downscope();
 143 }
 144
 145 void CPPFile::ns_out(Symbol *sym)
 146 {
 147         upscope();
 148         assert(indent.indent_level == 0);
 149
 150         for (Symbol *s = sym->find_toplevel_type()->get_ns(); s != toplevel;
 151              s = s->get_ns())
 152                 file << "}";
 153
 154         ifndef_out();
 155 }
 156
 157 void CPPFile::all_ns_in(Symbol *sym, bool include_self, const char *extra)
 158 {
 159         NameSpace *ns = sym->find_toplevel_type()->get_ns();
 160         StrList *ns_fqname = ns->get_fq_name();
 161
 162         ifndef_in(sym, extra);
 163
 164         for (StrList::const_iterator i = ns_fqname->begin();
 165              i != ns_fqname->end(); ++i) {
 166                 const String *str = *i;
 167                 file << "namespace " << *str << " {\n";
 168         }
 169
 170         stack<SymbolRef> typens;
 171
 172         if (!include_self)
 173                 sym = sym->get_ns();
 174
 175         for (Symbol *s = sym; s != ns; s = s->get_ns())
 176                 typens.push(s);
 177
 178         while (!typens.empty()) {
 179                 Symbol *s = typens.top();
 180                 typens.pop();
 181                 file << "namespace " << **s->name << "_ns {\n";
 182         }
 183
 184         downscope();
 185 }
 186
 187 void CPPFile::all_ns_out(Symbol *sym, bool include_self)
 188 {
 189         upscope();
 190         assert(indent.indent_level == 0);
 191
 192         if (!include_self)
 193                 sym = sym->get_ns();
 194
 195         for (Symbol *s = sym; s != toplevel; s = s->get_ns())
 196                 file << "}";
 197
 198         ifndef_out();
 199 }
 200
 201 String &CPPFile::get_definition_name(Symbol *sym, const char *prefix)
 202 {
 203         NameSpace *ns = sym->get_ns();
 204         UserNameSpace *uns = dynamic_cast<UserNameSpace *>(ns);
 205         String *str;
 206
 207         if (!uns) {
 208                 str = &get_definition_name(ns);
 209                 str->append("_ns::");
 210         } else {
 211                 str = new String();
 212         }
 213
 214         str->append(prefix);
 215         str->append(**sym->name);
 216         return *str;
 217 }
 218
 219 void cpp_output_name(ostream &file, Symbol *sym, const char *prefix)
 220 {
 221         StrList *sl = sym->get_fq_name("_ns");
 222         sl->pop_back();
 223
 224         file << "::" << *sl->flatten("::") << "::" << prefix << **sym->name;
 225 }
 226
 227 void CPPFile::output(UserNameSpace *sym, int pass, void *arg2)
 228 {
 229         assert(indent.indent_level == 0);
 230         delete new CPPFile(sym, dirname.c_str());
 231 }
 232
 233 static inline int round_up_bits(int bits)
 234 {
 235         assert(bits >= 1 && bits <= 64);
 236
 237         if (bits > 32)
 238                 return 64;
 239         if (bits > 16)
 240                 return 32;
 241         if (bits > 8)
 242                 return 16;
 243
 244         return 8;
 245 }
 246
 247 // FIXME: Inline arrays...
 248 void cpp_output_type(ostream &file, Type *t, bool array, bool is_mutable)
 249 {
 250         if (array) {
 251                 file << "::System::RunTime::";
 252
 253                 if (is_mutable)
 254                         file << "Mutable";
 255
 256                 file << "Array< ";
 257         }
 258
 259         cpp_output_name(file, t);
 260
 261         if (array)
 262                 file << ", ::System::RunTime::ORBMM>";
 263
 264         file << ' ';
 265 }
 266
 267 // FIXME: Inline arrays...
 268 void cpp_output_type(ostream &file, CompiledBasicType &t, bool is_mutable)
 269 {
 270         if (is_array(t)) {
 271                 file << "::System::RunTime::";
 272
 273                 if (is_mutable)
 274                         file << "Mutable";
 275
 276                 file << "Array< ";
 277         }
 278
 279         if (t.flags.field.Bool) {
 280                 // Don't rely on C++ to provide any particular representation
 281                 // of bool...
 282                 file << "uint8_t";
 283         } else if (t.flags.field.Float) {
 284                 if (t.bits == 32)
 285                         file << "float";
 286                 else
 287                         file << "double";
 288         } else {
 289                 if (t.flags.field.Unsigned)
 290                         file << 'u';
 291
 292                 file << "int" << round_up_bits(t.bits) << "_t";
 293         }
 294
 295         if (is_array(t))
 296                 file << ", ::System::RunTime::ORBMM>";
 297
 298         file << ' ';
 299 }
 300
 301 // FIXME: implement padding
 302 int CPPFile::output_datum(Struct *ns, Datum *d, int offset)
 303 {
 304         if (d->type) {
 305                 cpp_output_type(file, d->type, is_array(d->def.basictype),
 306                                 !d->def.flags.field.Immutable);
 307
 308                 Struct *dtype = dynamic_cast<Struct *>(*d->type);
 309                 if (dtype && !dtype->is_inline())
 310                         file << '*';
 311         } else {
 312                 cpp_output_type(file, d->def.basictype,
 313                                 !d->def.flags.field.Immutable);
 314         }
 315
 316         return offset;
 317 }
 318
 319 void CPPFile::declare_type_dependency(Type *t, bool need_obj_def)
 320 {
 321         Symbol *toplevel_type = t->find_toplevel_type();
 322
 323         assert(indent.indent_level == 0);
 324
 325         output_pass(toplevel_type, trav_nsdecl);
 326
 327         if (t == toplevel_type)
 328                 output_pass(t, trav_forward);
 329
 330         if (dynamic_cast<Interface *>(t))
 331                 output_pass(t, need_obj_def ? trav_obj_def : trav_obj_stub);
 332         else if (!dynamic_cast<Struct *>(t) || need_obj_def)
 333                 output_pass(t, trav_full);
 334 }
 335
 336 void CPPFile::declare_dependencies(Interface *iface, bool need_obj_def)
 337 {
 338         for (Interface::methods_iterator i = iface->methods_begin();
 339              i != iface->methods_end(); ++i)
 340         {
 341                 Method *m = *i;
 342                 for (Method::entries_iterator j = m->entries_begin();
 343                      j != m->entries_end(); ++j)
 344                 {
 345                         Param *p = *j;
 346                         if (p->type)
 347                                 declare_type_dependency(p->type, need_obj_def);
 348                 }
 349         }
 350
 351         for (Interface::supers_iterator i = iface->supers_begin();
 352              i != iface->supers_end(); ++i)
 353         {
 354                 Interface *super = *i;
 355                 declare_type_dependency(super);
 356         }
 357 }
 358
 359 void CPPFile::declare_dependencies(Struct *str)
 360 {
 361         for (NameSpace::const_iterator i = str->begin(); i != str->end(); ++i) {
 362                 Symbol *sym = (*i).second;
 363                 Datum *d = dynamic_cast<Datum *>(sym);
 364                 if (d) {
 365                         if (d->type)
 366                                 declare_type_dependency(d->type, d->is_inline());
 367
 368                         continue;
 369                 }
 370
 371                 Struct *mstr = dynamic_cast<Struct *>(sym);
 372                 if (mstr) {
 373                         declare_dependencies(mstr);
 374                         continue;
 375                 }
 376
 377                 Interface *miface = dynamic_cast<Interface *>(sym);
 378                 if (miface)
 379                         declare_dependencies(miface);
 380         }
 381 }
 382
 383 void CPPFile::output_guid(const uint64_t *guid64)
 384 {
 385         const unsigned char *guid = reinterpret_cast<const unsigned char *>(guid64);
 386         char guidhex[7];
 387
 388         file << indent << "__attribute__((weak))\n"
 389              << indent << "::System::RunTime::GUID _guid = {\n"
 390              << indent << "\t{ ";
 391
 392         for (int i = 0; i < 16; i++) {
 393                 if (i == 8)
 394                         file << '\n' << indent << "\t  ";
 395
 396                 sprintf(guidhex, "0x%02x, ", *guid++);
 397                 file << guidhex;
 398         }
 399
 400         file << "}\n"
 401              << indent << "};\n";
 402
 403         do_extra_newline = true;
 404 }
 405
 406 void CPPFile::output_nsdecl_begin(NameSpace *ns)
 407 {
 408         // If indent level is not zero, this is a nested struct or interface.
 409         if (indent.indent_level == 0)
 410                 ns_in(ns, "NS_");
 411         else
 412                 extra_newline();
 413
 414         file << indent << "namespace " << **ns->name << "_ns {\n";
 415         downscope();
 416 }
 417
 418 void CPPFile::output_nsdecl_children(NameSpace *ns)
 419 {
 420         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
 421                 Symbol *sym = (*i).second;
 422
 423                 assert(pass_needed(sym, trav_forward));
 424                 assert(pass_needed(sym, trav_nsdecl));
 425
 426                 // If it's a Method or a non-const Datum, this is a no-op.
 427                 output_pass(sym, trav_forward);
 428                 output_pass(sym, trav_nsdecl);
 429         }
 430 }
 431
 432 void CPPFile::output_nsdecl_end(NameSpace *ns)
 433 {
 434         upscope();
 435
 436         file << indent << "}\n";
 437
 438         if (indent.indent_level == 1)
 439                 ns_out(ns);
 440 }
 441
 442 void CPPFile::output_nsdecl(NameSpace *ns)
 443 {
 444         output_nsdecl_begin(ns);
 445         output_nsdecl_children(ns);
 446         output_nsdecl_end(ns);
 447 }
 448
 449 void CPPFile::output_aliases_and_types(NameSpace *ns)
 450 {
 451         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
 452                 Symbol *sym = (*i).second;
 453                 if (dynamic_cast<Alias *>(sym) || dynamic_cast<Type *>(sym))
 454                         output_pass(sym, trav_full);
 455         }
 456 }
 457
 458 void CPPFile::output_vstruct_info(Struct *sym)
 459 {
 460         all_ns_in(sym, true, "VINFO_");
 461
 462         file << indent << "__attribute__((weak)) "
 463                           "unsigned long * _guids[] = {\n";
 464
 465         stack<StructRef> supers;
 466         sym->chainlen = 0;
 467
 468         for (Struct *i = sym; i; i = i->get_super()) {
 469                 sym->chainlen++;
 470                 supers.push(i);
 471         }
 472
 473         for (int i = 0; i < sym->chainlen; i++) {
 474                 Struct *super = supers.top();
 475                 supers.pop();
 476
 477                 file << indent << '\t';
 478                 cpp_output_name(file, super);
 479                 file << "_ns::_guid.l,\n";
 480         }
 481
 482         file << indent << "};\n\n"
 483              << indent << "__attribute__((weak)) "
 484                           "::System::RunTime::VStructInfo _info = {\n"
 485              << indent << "\t_guids, " << sym->chainlen << ",\n"
 486 //           << indent << "\t_marshall, _unmarshall,\n"
 487              << indent << "};\n";
 488
 489
 490         all_ns_out(sym, true);
 491 }
 492
 493 void CPPFile::output_vstruct_main(Struct *sym)
 494 {
 495         assert(sym->is_virtual());
 496         Struct *super = sym->get_super();
 497
 498         const char *name = sym->name->c_str();
 499
 500         if (!super) {
 501                 assert(sym == System_VStruct);
 502                 file << indent << "const ::System::RunTime::VStructInfo "
 503                                   "*const _infoptr;\n\n";
 504         }
 505
 506         file << indent << name
 507              << "(const ::System::RunTime::VStructInfo *realinfo = &"
 508              << name << "_ns::_info) :\n"
 509              << indent;
 510
 511         if (!super)
 512                 file << "_infoptr";
 513         else
 514                 cpp_output_name(file, super);
 515
 516         file << "(realinfo)\n"
 517              << indent << "{\n"
 518              << indent << "}\n";
 519
 520         if (super)
 521                 file << '\n'
 522                      << indent << "static __attribute__((weak)) " << name << " *downcast(::System::VStruct *base)\n"
 523                      << indent << "{\n"
 524                      << indent << "\tif (!base)\n"
 525                      << indent << "\t\treturn NULL;\n\n"
 526                      << indent << "\tconst ::System::RunTime::VStructInfo *info = base->_infoptr;\n\n"
 527                      << indent << "\tif (info->chainlen < " << sym->chainlen << ")\n"
 528                      << indent << "\t\treturn NULL;\n\n"
 529                      << indent << "\tif (::System::RunTime::guids_equal(info->guids["
 530                                << sym->chainlen - 1 << "], " << name << "_ns::_guid.l))\n"
 531                      << indent << "\t\treturn static_cast<" << name << " *>(base);\n\n"
 532                      << indent << "\treturn NULL;\n"
 533                      << indent << "}\n";
 534
 535         do_extra_newline = true;
 536 }
 537
 538 // Output an init method that initializes all the elements in the
 539 // struct; this is useful for throwing exceptions.  Due to the
 540 // annoying, apparently unwaiveable-by-the-struct requirement that any
 541 // struct with a ctor be initialized using the ctor (and thus at
 542 // runtime, not statically), this can't be an actual ctor in
 543 // non-virtual structs.
 544 //
 545 // In virtual structs, there's already a ctor, so it wouldn't
 546 // matter.  It'd generally be best to be consistent and use the
 547 // init method for both, but the main intended use for this is
 548 // throwing exceptions (which are virtual), and it'd be
 549 // unfortunate to cripple 99% of the uses with unnecessary
 550 // syntactic cruft.  The init method will remain available
 551 // for vstructs so that things won't break if a non-vstruct
 552 // gets made virtual (or if a user really wants to be consistent
 553 // between both types in their own code).
 554
 555 void CPPFile::output_struct_ctor(Struct *sym, bool extra_vstruct)
 556 {
 557         const char *method_name = extra_vstruct ? sym->name->c_str() : " _init";
 558
 559         file << '\n' << indent << **sym->name;
 560         indent.align_spaces = sym->name->length() + 1;
 561
 562         if (!extra_vstruct) {
 563                 file << " &_init";
 564                 indent.align_spaces += 7;
 565         }
 566
 567         file << '(';
 568         output_struct_ctor_rec1(sym, 0);
 569
 570         if (extra_vstruct) {
 571                 Struct *super = sym->get_super();
 572
 573                 file << ",\n" << indent
 574                      << "const ::System::RunTime::VStructInfo *_realinfo = &"
 575                      << **sym->name << "_ns::_info) :\n";
 576
 577                 indent.align_spaces = 0;
 578                 file << indent;
 579
 580                 if (!super)
 581                         file << "_infoptr";
 582                 else
 583                         cpp_output_name(file, super);
 584
 585                 file << "(_realinfo";
 586         }
 587
 588         indent.align_spaces = 0;
 589         file << ")\n" << indent << "{\n";
 590
 591         indent.indent_level++;
 592
 593         output_struct_ctor_rec2(sym, 0);
 594
 595         if (!extra_vstruct)
 596                 file << indent << "return *this;\n";
 597
 598         indent.indent_level--;
 599         file << indent << "}\n";
 600 }
 601
 602 int CPPFile::output_struct_ctor_rec1(Struct *sym, int num)
 603 {
 604         if (sym->get_super())
 605                 num = output_struct_ctor_rec1(sym->get_super(), num);
 606
 607         for (Struct::entries_iterator i = sym->entries_begin();
 608              i != sym->entries_end(); ++i)
 609         {
 610                 if (num++)
 611                         file << ",\n" << indent;
 612
 613                 output_datum(sym, *i, -1);
 614                 file << "_arg" << num;
 615         }
 616
 617         return num;
 618 }
 619
 620 int CPPFile::output_struct_ctor_rec2(Struct *sym, int num)
 621 {
 622         if (sym->get_super())
 623                 num = output_struct_ctor_rec2(sym->get_super(), num);
 624
 625         for (Struct::entries_iterator i = sym->entries_begin();
 626              i != sym->entries_end(); ++i)
 627         {
 628                 Datum *d = *i;
 629                 file << indent << **d->name << " = _arg" << ++num << ";\n";
 630         }
 631
 632         return num;
 633 }
 634
 635 void CPPFile::output(Struct *sym, int pass, void *arg2)
 636 {
 637         switch (pass) {
 638                 case trav_nsdecl:
 639                         if (sym->is_virtual()) {
 640                                 output_nsdecl_begin(sym);
 641                                 output_nsdecl_children(sym);
 642                                 output_guid(sym->def.guid);
 643                                 output_marshall_pass(sym, trav_nsdecl);
 644                                 output_nsdecl_end(sym);
 645                         } else {
 646                                 output_nsdecl_begin(sym);
 647                                 output_nsdecl_children(sym);
 648                                 output_marshall_pass(sym, trav_nsdecl);
 649                                 output_nsdecl_end(sym);
 650                         }
 651
 652                         break;
 653
 654                 case trav_forward: {
 655                         bool nested = indent.indent_level != 0;
 656
 657                         if (!nested)
 658                                 ns_in(sym, "FWD_");
 659                         else
 660                                 extra_newline();
 661
 662                         file << indent << "struct " << **sym->name << ";\n";
 663
 664                         if (!nested)
 665                                 ns_out(sym);
 666
 667                         break;
 668                 }
 669
 670                 case trav_full: {
 671                         output_pass(sym, trav_nsdecl);
 672                         Struct *super = sym->get_super();
 673
 674                         if (super)
 675                                 output_pass(super, trav_full);
 676
 677                         if (sym->is_virtual())
 678                                 output_vstruct_info(sym);
 679
 680                         declare_dependencies(sym);
 681                         ns_in(sym);
 682
 683                         file << indent << "struct " << get_definition_name(sym);
 684
 685                         if (super) {
 686                                 const String *supername = super->get_fq_name("_ns")
 687                                                                ->flatten("::");
 688                                 file << " :\n" << indent << "public ::" << *supername;
 689                         }
 690
 691                         file << "\n" << indent << "{\n";
 692                         downscope();
 693
 694                         if (sym->is_virtual())
 695                                 output_vstruct_main(sym);
 696
 697                         int offset = 0;
 698                         for (Struct::entries_iterator i = sym->entries_begin();
 699                              i != sym->entries_end(); ++i)
 700                         {
 701                                 extra_newline();
 702                                 Datum *d = *i;
 703                                 file << indent;
 704                                 offset = output_datum(sym, d, offset);
 705                                 file << **d->name << ";\n";
 706                         }
 707
 708                         bool empty_struct = true;
 709                         for (Struct *s = sym; s; s = s->get_super()) {
 710                                 if (s->entries_begin() != s->entries_end()) {
 711                                         empty_struct = false;
 712                                         break;
 713                                 }
 714                         }
 715
 716                         if (!empty_struct) {
 717                                 output_struct_ctor(sym, false);
 718
 719                                 if (sym->is_virtual())
 720                                         output_struct_ctor(sym, true);
 721                         }
 722
 723                         output_marshall_pass(sym, trav_full);
 724
 725                         upscope();
 726                         file << indent << "};\n";
 727
 728                         ns_out(sym);
 729
 730                         output_aliases_and_types(sym);
 731
 732                         for (NameSpace::const_iterator i = sym->begin(); i != sym->end(); ++i) {
 733                                 Symbol *sym2 = (*i).second;
 734                                 output_pass(sym2, trav_full);
 735                         }
 736
 737                         break;
 738                 }
 739
 740                 case trav_marshall:
 741                         output_marshall(sym, static_cast<Datum *>(arg2));
 742                         break;
 743
 744                 default:
 745                         BUG();
 746         }
 747 }
 748
 749 void CPPFile::output(Interface *sym, int pass, void *arg2)
 750 {
 751         switch (pass) {
 752                 case trav_nsdecl:
 753                         output_nsdecl_begin(sym);
 754                         output_nsdecl_children(sym);
 755
 756                         output_guid(sym->def.guid);
 757                         output_ifaceinfo(sym);
 758
 759                         output_nsdecl_end(sym);
 760                         break;
 761
 762                 case trav_forward: {
 763                         bool nested = indent.indent_level != 0;
 764
 765                         if (!nested)
 766                                 ns_in(sym, "FWD_");
 767                         else
 768                                 extra_newline();
 769
 770                         file << indent << "struct " << **sym->name << ";\n"
 771                              << indent << "struct _i_" << **sym->name << ";\n";
 772
 773                         if (!nested)
 774                                 ns_out(sym);
 775
 776                         break;
 777                 }
 778
 779                 case trav_obj_stub: {
 780                         output_pass(sym, trav_forward);
 781
 782                         for (Interface::supers_iterator i = sym->supers_begin();
 783                              i != sym->supers_end(); ++i)
 784                         {
 785                                 Interface *super = *i;
 786                                 output_pass(super, trav_obj_stub);
 787                         }
 788
 789                         declare_dependencies(sym);
 790                         ns_in(sym, "STUB_");
 791
 792                         file << indent << "struct "
 793                              << get_definition_name(sym) << " {\n";
 794
 795                         downscope();
 796
 797                         output_wrapper(sym);
 798
 799                         upscope();
 800                         file << indent << "};\n";
 801
 802                         ns_out(sym);
 803                         break;
 804                 }
 805
 806                 case trav_obj_def: {
 807                         output_pass(sym, trav_obj_stub);
 808
 809                         for (Interface::supers_iterator i = sym->supers_begin();
 810                              i != sym->supers_end(); ++i)
 811                         {
 812                                 Interface *super = *i;
 813                                 output_pass(super, trav_full);
 814                         }
 815
 816                         declare_dependencies(sym);
 817                         ns_in(sym, "OBJDEF_");
 818
 819                         file << indent << "struct ";
 820                         file << get_definition_name(sym, "_i_") << " {\n";
 821
 822                         downscope();
 823
 824                         output_internal(sym);
 825
 826                         upscope();
 827                         file << indent << "};\n\n";
 828
 829                         output_casts(sym);
 830
 831                         ns_out(sym);
 832                         break;
 833
 834                 case trav_full:
 835                         output_pass(sym, trav_obj_def);
 836
 837                         declare_dependencies(sym, true);
 838                         ns_in(sym);
 839
 840                         output_method_defs(sym);
 841
 842                         ns_out(sym);
 843                         output_aliases_and_types(sym);
 844
 845                         for (NameSpace::const_iterator i = sym->begin(); i != sym->end(); ++i) {
 846                                 Symbol *sym2 = (*i).second;
 847                                 output_pass(sym2, trav_full);
 848                         }
 849
 850                         break;
 851
 852                 case trav_marshall:
 853                         output_marshall(sym, static_cast<Datum *>(arg2));
 854                         break;
 855
 856                 default:
 857                         BUG();
 858                 }
 859         }
 860 }
 861
 862 void CPPFile::output_bf_elem(Datum *d, int pos, int bits,
 863                              string &prefix)
 864 {
 865         Type *t = d->type;
 866         BitField *bf = dynamic_cast<BitField *>(t);
 867         Enum *en = dynamic_cast<Enum *>(t);
 868
 869         string fieldname;
 870
 871         if (!d->name->compare(0, 4, "get_") ||
 872             !d->name->compare(0, 4, "set_"))
 873                 fieldname = '_';
 874
 875         fieldname.append(**d->name);
 876
 877         if (bf) {
 878                 string newprefix(prefix);
 879                 newprefix.append(**d->name);
 880                 newprefix.append("_IDLNS_");
 881                 output_bf(bf, d->def.icon, bits, newprefix);
 882
 883                 // FIXME: getters and setters
 884         } else if (en || !t) {
 885                 file << indent << "uint" << bits << "_t "
 886                      << prefix << fieldname << ':' << d->def.icon << ";\n";
 887         } else {
 888                 // This is checked here rather than in input.cc, because
 889                 // I'm lazy.
 890
 891                 fprintf(stderr, "idlc: Bad input: \"%s\" cannot be the type of \"%s\"\n",
 892                         t->get_fq_name()->flatten()->c_str(),
 893                         d->get_fq_name()->flatten()->c_str());
 894
 895                 throw UserError();
 896         }
 897 }
 898
 899 void CPPFile::output_bf(BitField *sym, int bits, int typebits,
 900                         string &prefix)
 901 {
 902         int size = 0;
 903
 904         assert(bits == sym->def.bits || bits == typebits);
 905
 906         for (BitField::entries_iterator i = sym->entries_begin();
 907              i != sym->entries_end(); ++i)
 908                 size += (*i)->def.icon;
 909
 910         if (size > sym->def.bits) {
 911                 // FIXME: This isn't detected in the front end,
 912                 // but even once it is, this should stay as a
 913                 // replacement for input.cc checking.
 914
 915                 fprintf(stderr, "idlc: \"%s\" is too small (%d bits) for its "
 916                                 "contents (%d bits)\n",
 917                         sym->get_fq_name()->flatten()->c_str(),
 918                         sym->def.bits, size);
 919
 920                 throw UserError();
 921         }
 922
 923         if (target->bitfield_big_endian) {
 924                 if (size != bits) {
 925                         // The prefix is put at the end, so that we can avoid
 926                         // consecutive underscores or an underscore followed
 927                         // by a capital, both of which are reserved in C++.
 928
 929                         file << indent << "uint" << bits << "_t _pad_" << prefix
 930                              << ':' << bits - size << ";\n";
 931                 }
 932
 933                 int pos = sym->def.bits;
 934
 935                 for (BitField::entries_reverse_iterator i = sym->entries_rbegin();
 936                      i != sym->entries_rend(); ++i)
 937                 {
 938                         Datum *d = *i;
 939                         pos -= d->def.icon;
 940                         output_bf_elem(d, pos, typebits, prefix);
 941                 }
 942         } else {
 943                 int pos = 0;
 944
 945                 for (BitField::entries_iterator i = sym->entries_begin();
 946                      i != sym->entries_end(); ++i)
 947                 {
 948                         Datum *d = *i;
 949                         output_bf_elem(d, pos, typebits, prefix);
 950                         pos += d->def.icon;
 951                 }
 952         }
 953 }
 954
 955 void CPPFile::output(BitField *sym, int pass, void *arg2)
 956 {
 957         switch (pass) {
 958                 case trav_nsdecl:
 959                         output_nsdecl(sym);
 960                         break;
 961
 962                 case trav_forward:
 963                         extra_newline();
 964                         file << indent << "union " << **sym->name << ";\n";
 965                         break;
 966
 967                 case trav_full: {
 968                         int bits = round_up_bits(sym->def.bits);
 969                         ns_in(sym);
 970
 971                         file << indent << "union ";
 972                         file << get_definition_name(sym) << " {\n";
 973                         downscope();
 974
 975                         file << indent << "struct {\n";
 976
 977                         downscope();
 978                         string nullprefix;
 979                         output_bf(sym, bits, bits, nullprefix);
 980                         upscope();
 981
 982                         file << indent << "};\n\n"
 983                              << indent << "uint" << bits << "_t _raw;\n\n"
 984                              << indent << **sym->name << "()\n"
 985                              << indent << "{\n"
 986                              << indent << "\t_raw = 0;\n"
 987                              << indent << "}\n\n"
 988                              << indent << **sym->name << "(uint" << bits << "_t _init)\n"
 989                              << indent << "{\n"
 990                              << indent << "\t_raw = _init;\n"
 991                              << indent << "}\n\n"
 992                              << indent << "operator uint" << bits << "_t()\n"
 993                              << indent << "{\n"
 994                              << indent << "\treturn _raw;\n"
 995                              << indent << "}\n";
 996
 997                         upscope();
 998                         file << indent << "};\n";
 999
1000                         ns_out(sym);
1001                         output_aliases_and_types(sym);
1002                         break;
1003                 }
1004
1005                 case trav_marshall:
1006                         output_marshall(sym, static_cast<Datum *>(arg2));
1007                         break;
1008
1009                 default:
1010                         BUG();
1011         }
1012 }
1013
1014
1015 void CPPFile::output(Enum *sym, int pass, void *arg2)
1016 {
1017         switch (pass) {
1018                 case trav_nsdecl:
1019                         /* no-op */
1020                         break;
1021
1022                 case trav_forward: {
1023                         bool do_ns_out = false;
1024
1025                         if (indent.indent_level == 0) {
1026                                 ns_in(sym);
1027                                 do_ns_out = true;
1028                         } else {
1029                                 extra_newline();
1030                         }
1031
1032                         file << indent << "struct " << **sym->name << " {\n";
1033                         downscope();
1034
1035                         for (Enum::entries_iterator i = sym->entries_begin();
1036                              i != sym->entries_end(); ++i)
1037                         {
1038                                 Datum *d = *i;
1039
1040                                 file << indent << "static const uint"
1041                                      << round_up_bits(sym->def.bits) << "_t "
1042                                      << **d->name << " = " << d->def.ucon << ";\n";
1043                         }
1044
1045                         file << '\n' << indent << "unsigned int _val;\n\n";
1046
1047                         file << indent << **sym->name << "()\n"
1048                              << indent << "{\n"
1049                              << indent << "\t_val = 0;\n"
1050                              << indent << "}\n\n";
1051
1052                         file << indent << **sym->name << "(unsigned int val)\n"
1053                              << indent << "{\n"
1054                              << indent << "\t_val = val;\n"
1055                              << indent << "}\n\n";
1056
1057                         file << indent << "operator unsigned int()\n"
1058                              << indent << "{\n"
1059                              << indent << "\treturn _val;\n"
1060                              << indent << "}\n\n";
1061
1062                         upscope();
1063                         file << indent << "};\n";
1064
1065                         if (do_ns_out)
1066                                 ns_out(sym);
1067
1068                         break;
1069                 }
1070
1071                 case trav_full:
1072                         // Nothing particular to do here, other than to make sure
1073                         // that trav_forward has happened (which will always need to
1074                         // be done here if it's not a nested type).
1075
1076                         output_pass(sym, trav_forward);
1077                         break;
1078
1079                 case trav_marshall:
1080                         output_marshall(sym, static_cast<Datum *>(arg2));
1081                         break;
1082
1083                 default:
1084                         BUG();
1085         }
1086 }
1087
1088 void CPPFile::output(BasicType *sym, int pass, void *arg2)
1089 {
1090         switch (pass) {
1091                 case trav_nsdecl:
1092                         /* no-op */
1093                         break;
1094
1095                 case trav_forward: {
1096                         bool do_ns_out = false;
1097
1098                         if (indent.indent_level == 0) {
1099                                 ns_in(sym);
1100                                 do_ns_out = true;
1101                         } else {
1102                                 extra_newline();
1103                         }
1104
1105                         file << indent << "typedef ";
1106                         assert(!is_array(sym->def));
1107                         cpp_output_type(file, sym->def, false);
1108                         file << **sym->name << ";\n";
1109
1110                         if (do_ns_out)
1111                                 ns_out(sym);
1112
1113                         break;
1114                 }
1115
1116                 case trav_full:
1117                         output_pass(sym, trav_forward);
1118                         break;
1119
1120                 case trav_marshall:
1121                         output_marshall(sym, static_cast<Datum *>(arg2));
1122                         break;
1123
1124                 default:
1125                         BUG();
1126         }
1127 }
1128
1129 void CPPFile::output(Alias *sym, int pass, void *arg2)
1130 {
1131         switch (pass) {
1132                 case trav_nsdecl:
1133                         /* no-op */
1134                         break;
1135
1136                 case trav_forward: {
1137                         bool do_ns_out = false;
1138
1139                         if (indent.indent_level == 0) {
1140                                 all_ns_in(sym);
1141                                 do_ns_out = true;
1142                         } else {
1143                                 extra_newline();
1144                         }
1145
1146                         const String *type = sym->get_concrete_sym()->get_fq_name("_ns")
1147                                                 ->flatten("::");
1148
1149                         file << indent << "typedef " << *type << " "
1150                              << **sym->name << ";\n";
1151
1152                         if (do_ns_out)
1153                                 all_ns_out(sym);
1154
1155                         break;
1156                 }
1157
1158                 case trav_full:
1159                         output_pass(sym, trav_forward);
1160                         break;
1161
1162                 default:
1163                         BUG();
1164         }
1165 }
1166
1167 void CPPFile::output(TypeDef *sym, int pass, void *arg2)
1168 {
1169         switch (pass) {
1170                 case trav_nsdecl:
1171                 case trav_forward:
1172                         /* no-op */
1173                         break;
1174
1175                 case trav_full: {
1176                         output_pass(sym->get_concrete_sym(), trav_forward);
1177
1178                         bool do_ns_out = false;
1179
1180                         if (indent.indent_level == 0) {
1181                                 all_ns_in(sym);
1182                                 do_ns_out = true;
1183                         } else {
1184                                 extra_newline();
1185                         }
1186
1187                         const String *type = sym->get_concrete_sym()->get_fq_name("_ns")
1188                                                 ->flatten("::");
1189
1190                         file << indent << "typedef " << *type << " "
1191                              << **sym->name << ";\n";
1192
1193                         if (do_ns_out)
1194                                 all_ns_out(sym);
1195
1196                         break;
1197                 }
1198
1199                 default:
1200                         BUG();
1201         }
1202 }
1203
1204 void CPPFile::output(Datum *sym, int pass, void *arg2)
1205 {
1206         assert(sym->def.flags.field.Const);
1207
1208         switch (pass) {
1209                 case trav_nsdecl:
1210                 case trav_forward:
1211                         /* no-op */
1212                         break;
1213
1214                 case trav_full: {
1215                         if (sym->type)
1216                                 declare_type_dependency(sym->type, false);
1217
1218                         bool do_ns_out = false;
1219
1220                         if (indent.indent_level == 0) {
1221                                 all_ns_in(sym);
1222                                 do_ns_out = true;
1223                         } else {
1224                                 extra_newline();
1225                         }
1226
1227                         file << indent << "static const ";
1228
1229                         assert(!is_array(sym->def.basictype));
1230
1231                         if (sym->type)
1232                                 cpp_output_type(file, sym->type, false, false);
1233                         else
1234                                 cpp_output_type(file, sym->def.basictype, false);
1235
1236                         file << **sym->name << " = ";
1237
1238                         CompiledBasicType *def;
1239                         if (sym->type) {
1240                                 Symbol *real_type = sym->type->get_concrete_sym();
1241                                 BasicType *bt = dynamic_cast<BasicType *>(real_type);
1242                                 assert(bt);
1243
1244                                 def = &bt->def;
1245                         } else {
1246                                 def = &sym->def.basictype;
1247                         }
1248
1249                         if (def->flags.field.Float) {
1250                                 file << sym->def.fcon;
1251                         } else if (def->flags.field.Bool) {
1252                                 if (sym->def.ucon == 0)
1253                                         file << "false";
1254                                 else
1255                                         file << "true";
1256                         } else {
1257                                 if (def->flags.field.Unsigned) {
1258                                         file << "0x" << std::hex << sym->def.ucon << std::dec << 'U';
1259                                 } else {
1260                                         file << sym->def.icon;
1261                                 }
1262
1263                                 file << "LL";
1264                         }
1265
1266                         file << ";\n";
1267
1268                         if (do_ns_out)
1269                                 all_ns_out(sym);
1270
1271                         break;
1272                 }
1273
1274                 default:
1275                         BUG();
1276         }
1277 }
1278
1279 void CPPBinding::output_root(UserNameSpace *ns, const char *dir)
1280 {
1281         delete new CPPFile(ns, dir);
1282 }