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 << ">";
 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 << '>';
 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 << "static const __attribute__((unused)) union {\n"
 389              << indent << "\tunsigned char c[16];\n"
 390              << indent << "\tunsigned long l[];\n"
 391              << indent << "} _guid = {\n"
 392              << indent << "\t{ ";
 393
 394         for (int i = 0; i < 16; i++) {
 395                 if (i == 8)
 396                         file << '\n' << indent << "\t  ";
 397
 398                 sprintf(guidhex, "0x%02x, ", *guid++);
 399                 file << guidhex;
 400         }
 401
 402         file << "}\n"
 403              << indent << "};\n";
 404
 405         do_extra_newline = true;
 406 }
 407
 408 void CPPFile::output_nsdecl(NameSpace *ns, nsdecl_callback cb)
 409 {
 410         // If indent level is not zero, this is a nested struct or interface.
 411         if (indent.indent_level == 0)
 412                 ns_in(ns, "NS_");
 413         else
 414                 extra_newline();
 415
 416         file << indent << "namespace " << **ns->name << "_ns {\n";
 417         downscope();
 418
 419         if (cb)
 420                 cb(this, ns);
 421
 422         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
 423                 Symbol *sym = (*i).second;
 424
 425                 assert(pass_needed(sym, trav_forward));
 426                 assert(pass_needed(sym, trav_nsdecl));
 427
 428                 // If it's a Method or a non-const Datum, this is a no-op.
 429                 output_pass(sym, trav_forward);
 430                 output_pass(sym, trav_nsdecl);
 431         }
 432
 433         upscope();
 434
 435         file << indent << "}\n";
 436
 437         if (indent.indent_level == 1)
 438                 ns_out(ns);
 439 }
 440
 441 void CPPFile::output_aliases_and_types(NameSpace *ns)
 442 {
 443         for (NameSpace::const_iterator i = ns->begin(); i != ns->end(); ++i) {
 444                 Symbol *sym = (*i).second;
 445                 if (dynamic_cast<Alias *>(sym) || dynamic_cast<Type *>(sym))
 446                         output_pass(sym, trav_full);
 447         }
 448 }
 449
 450 void CPPFile::output_vstruct_ns(CPPFile *cpp, NameSpace *sym)
 451 {
 452         Struct *str = dynamic_cast<Struct *>(sym);
 453         assert(str);
 454         assert(str->is_virtual());
 455
 456         cpp->output_guid(str->def.guid);
 457 }
 458
 459 void CPPFile::output_vstruct_info(Struct *sym)
 460 {
 461         all_ns_in(sym, true, "VINFO_");
 462
 463         file << indent << "static const __attribute__((unused)) "
 464                           "unsigned long *const _guids[] = {\n";
 465
 466         stack<StructRef> supers;
 467         sym->chainlen = 0;
 468
 469         for (Struct *i = sym; i; i = i->get_super()) {
 470                 sym->chainlen++;
 471                 supers.push(i);
 472         }
 473
 474         for (int i = 0; i < sym->chainlen; i++) {
 475                 Struct *super = supers.top();
 476                 supers.pop();
 477
 478                 file << indent << '\t';
 479                 cpp_output_name(file, super);
 480                 file << "_ns::_guid.l,\n";
 481         }
 482
 483         file << indent << "};\n\n"
 484              << indent << "static const __attribute__((unused)) "
 485                           "::System::RunTime::VStructInfo _info = {\n"
 486              << indent << "\t_guids, " << sym->chainlen << '\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 " << 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(sym, output_vstruct_ns);
 641                         } else {
 642                                 output_nsdecl(sym);
 643                         }
 644
 645                         break;
 646
 647                 case trav_forward: {
 648                         bool nested = indent.indent_level != 0;
 649
 650                         if (!nested)
 651                                 ns_in(sym, "FWD_");
 652                         else
 653                                 extra_newline();
 654
 655                         file << indent << "struct " << **sym->name << ";\n";
 656
 657                         if (!nested)
 658                                 ns_out(sym);
 659
 660                         break;
 661                 }
 662
 663                 case trav_full: {
 664                         output_pass(sym, trav_nsdecl);
 665                         Struct *super = sym->get_super();
 666
 667                         if (super)
 668                                 output_pass(super, trav_full);
 669
 670                         if (sym->is_virtual())
 671                                 output_vstruct_info(sym);
 672
 673                         declare_dependencies(sym);
 674                         ns_in(sym);
 675
 676                         file << indent << "struct " << get_definition_name(sym);
 677
 678                         if (super) {
 679                                 const String *supername = super->get_fq_name("_ns")
 680                                                                ->flatten("::");
 681                                 file << " :\n" << indent << "public ::" << *supername;
 682                         }
 683
 684                         file << "\n" << indent << "{\n";
 685                         downscope();
 686
 687                         if (sym->is_virtual())
 688                                 output_vstruct_main(sym);
 689
 690                         int offset = 0;
 691                         for (Struct::entries_iterator i = sym->entries_begin();
 692                              i != sym->entries_end(); ++i)
 693                         {
 694                                 extra_newline();
 695                                 Datum *d = *i;
 696                                 file << indent;
 697                                 offset = output_datum(sym, d, offset);
 698                                 file << **d->name << ";\n";
 699                         }
 700
 701                         bool empty_struct = true;
 702                         for (Struct *s = sym; s; s = s->get_super()) {
 703                                 if (s->entries_begin() != s->entries_end()) {
 704                                         empty_struct = false;
 705                                         break;
 706                                 }
 707                         }
 708
 709                         if (!empty_struct) {
 710                                 output_struct_ctor(sym, false);
 711
 712                                 if (sym->is_virtual())
 713                                         output_struct_ctor(sym, true);
 714                         }
 715
 716                         upscope();
 717                         file << indent << "};\n";
 718
 719                         ns_out(sym);
 720
 721                         output_aliases_and_types(sym);
 722
 723                         for (NameSpace::const_iterator i = sym->begin(); i != sym->end(); ++i) {
 724                                 Symbol *sym2 = (*i).second;
 725                                 output_pass(sym2, trav_full);
 726                         }
 727
 728                         break;
 729                 }
 730
 731                 default:
 732                         BUG();
 733         }
 734 }
 735
 736 void CPPFile::output_iface_ns(CPPFile *file, NameSpace *sym)
 737 {
 738         Interface *i = dynamic_cast<Interface *>(sym);
 739         assert(i);
 740
 741         file->output_guid(i->def.guid);
 742 }
 743
 744 void CPPFile::output(Interface *sym, int pass, void *arg2)
 745 {
 746         switch (pass) {
 747                 case trav_nsdecl:
 748                         output_nsdecl(sym, output_iface_ns);
 749                         break;
 750
 751                 case trav_forward: {
 752                         bool nested = indent.indent_level != 0;
 753
 754                         if (!nested)
 755                                 ns_in(sym, "FWD_");
 756                         else
 757                                 extra_newline();
 758
 759                         file << indent << "struct " << **sym->name << ";\n"
 760                              << indent << "struct _i_" << **sym->name << ";\n";
 761
 762                         if (!nested)
 763                                 ns_out(sym);
 764
 765                         break;
 766                 }
 767
 768                 case trav_obj_stub: {
 769                         output_pass(sym, trav_forward);
 770
 771                         for (Interface::supers_iterator i = sym->supers_begin();
 772                              i != sym->supers_end(); ++i)
 773                         {
 774                                 Interface *super = *i;
 775                                 output_pass(super, trav_obj_stub);
 776                         }
 777
 778                         declare_dependencies(sym);
 779                         ns_in(sym, "STUB_");
 780
 781                         file << indent << "struct "
 782                              << get_definition_name(sym) << " {\n";
 783
 784                         downscope();
 785
 786                         output_wrapper(sym);
 787
 788                         upscope();
 789                         file << indent << "};\n";
 790
 791                         ns_out(sym);
 792                         break;
 793                 }
 794
 795                 case trav_obj_def: {
 796                         output_pass(sym, trav_obj_stub);
 797
 798                         for (Interface::supers_iterator i = sym->supers_begin();
 799                              i != sym->supers_end(); ++i)
 800                         {
 801                                 Interface *super = *i;
 802                                 output_pass(super, trav_full);
 803                         }
 804
 805                         declare_dependencies(sym);
 806                         ns_in(sym, "OBJDEF_");
 807
 808                         file << indent << "struct ";
 809                         file << get_definition_name(sym, "_i_") << " {\n";
 810
 811                         downscope();
 812
 813                         output_internal(sym);
 814
 815                         upscope();
 816                         file << indent << "};\n\n";
 817
 818                         output_casts(sym);
 819
 820                         ns_out(sym);
 821                         break;
 822
 823                 case trav_full:
 824                         output_pass(sym, trav_obj_def);
 825
 826                         declare_dependencies(sym, true);
 827                         ns_in(sym);
 828
 829                         output_method_defs(sym);
 830
 831                         ns_out(sym);
 832                         output_aliases_and_types(sym);
 833
 834                         for (NameSpace::const_iterator i = sym->begin(); i != sym->end(); ++i) {
 835                                 Symbol *sym2 = (*i).second;
 836                                 output_pass(sym2, trav_full);
 837                         }
 838
 839                         break;
 840
 841                 default:
 842                         BUG();
 843                 }
 844         }
 845 }
 846
 847 void CPPFile::output_bf_elem(Datum *d, int pos, int bits,
 848                              string &prefix)
 849 {
 850         Type *t = d->type;
 851         BitField *bf = dynamic_cast<BitField *>(t);
 852         Enum *en = dynamic_cast<Enum *>(t);
 853
 854         string fieldname;
 855
 856         if (!d->name->compare(0, 4, "get_") ||
 857             !d->name->compare(0, 4, "set_"))
 858                 fieldname = '_';
 859
 860         fieldname.append(**d->name);
 861
 862         if (bf) {
 863                 string newprefix(prefix);
 864                 newprefix.append(**d->name);
 865                 newprefix.append("_IDLNS_");
 866                 output_bf(bf, d->def.icon, bits, newprefix);
 867
 868                 // FIXME: getters and setters
 869         } else if (en || !t) {
 870                 file << indent << "uint" << bits << "_t "
 871                      << prefix << fieldname << ':' << d->def.icon << ";\n";
 872         } else {
 873                 // This is checked here rather than in input.cc, because
 874                 // I'm lazy.
 875
 876                 fprintf(stderr, "idlc: Bad input: \"%s\" cannot be the type of \"%s\"\n",
 877                         t->get_fq_name()->flatten()->c_str(),
 878                         d->get_fq_name()->flatten()->c_str());
 879
 880                 throw UserError();
 881         }
 882 }
 883
 884 void CPPFile::output_bf(BitField *sym, int bits, int typebits,
 885                         string &prefix)
 886 {
 887         int size = 0;
 888
 889         assert(bits == sym->def.bits || bits == typebits);
 890
 891         for (BitField::entries_iterator i = sym->entries_begin();
 892              i != sym->entries_end(); ++i)
 893                 size += (*i)->def.icon;
 894
 895         if (size > sym->def.bits) {
 896                 // FIXME: This isn't detected in the front end,
 897                 // but even once it is, this should stay as a
 898                 // replacement for input.cc checking.
 899
 900                 fprintf(stderr, "idlc: \"%s\" is too small (%d bits) for its "
 901                                 "contents (%d bits)\n",
 902                         sym->get_fq_name()->flatten()->c_str(),
 903                         sym->def.bits, size);
 904
 905                 throw UserError();
 906         }
 907
 908         if (target->bitfield_big_endian) {
 909                 if (size != bits) {
 910                         // The prefix is put at the end, so that we can avoid
 911                         // consecutive underscores or an underscore followed
 912                         // by a capital, both of which are reserved in C++.
 913
 914                         file << indent << "uint" << bits << "_t _pad_" << prefix
 915                              << ':' << bits - size << ";\n";
 916                 }
 917
 918                 int pos = sym->def.bits;
 919
 920                 for (BitField::entries_reverse_iterator i = sym->entries_rbegin();
 921                      i != sym->entries_rend(); ++i)
 922                 {
 923                         Datum *d = *i;
 924                         pos -= d->def.icon;
 925                         output_bf_elem(d, pos, typebits, prefix);
 926                 }
 927         } else {
 928                 int pos = 0;
 929
 930                 for (BitField::entries_iterator i = sym->entries_begin();
 931                      i != sym->entries_end(); ++i)
 932                 {
 933                         Datum *d = *i;
 934                         output_bf_elem(d, pos, typebits, prefix);
 935                         pos += d->def.icon;
 936                 }
 937         }
 938 }
 939
 940 void CPPFile::output(BitField *sym, int pass, void *arg2)
 941 {
 942         switch (pass) {
 943                 case trav_nsdecl:
 944                         output_nsdecl(sym);
 945                         break;
 946
 947                 case trav_forward:
 948                         extra_newline();
 949                         file << indent << "union " << **sym->name << ";\n";
 950                         break;
 951
 952                 case trav_full: {
 953                         int bits = round_up_bits(sym->def.bits);
 954                         ns_in(sym);
 955
 956                         file << indent << "union ";
 957                         file << get_definition_name(sym) << " {\n";
 958                         downscope();
 959
 960                         file << indent << "struct {\n";
 961
 962                         downscope();
 963                         string nullprefix;
 964                         output_bf(sym, bits, bits, nullprefix);
 965                         upscope();
 966
 967                         file << indent << "};\n\n"
 968                              << indent << "uint" << bits << "_t _raw;\n\n"
 969                              << indent << **sym->name << "()\n"
 970                              << indent << "{\n"
 971                              << indent << "\t_raw = 0;\n"
 972                              << indent << "}\n\n"
 973                              << indent << **sym->name << "(uint" << bits << "_t _init)\n"
 974                              << indent << "{\n"
 975                              << indent << "\t_raw = _init;\n"
 976                              << indent << "}\n\n"
 977                              << indent << "operator uint" << bits << "_t()\n"
 978                              << indent << "{\n"
 979                              << indent << "\treturn _raw;\n"
 980                              << indent << "}\n";
 981
 982                         upscope();
 983                         file << indent << "};\n";
 984
 985                         ns_out(sym);
 986                         output_aliases_and_types(sym);
 987                         break;
 988                 }
 989
 990                 default:
 991                         BUG();
 992         }
 993 }
 994
 995
 996 void CPPFile::output(Enum *sym, int pass, void *arg2)
 997 {
 998         switch (pass) {
 999                 case trav_nsdecl:
1000                         /* no-op */
1001                         break;
1002
1003                 case trav_forward: {
1004                         bool do_ns_out = false;
1005
1006                         if (indent.indent_level == 0) {
1007                                 ns_in(sym);
1008                                 do_ns_out = true;
1009                         } else {
1010                                 extra_newline();
1011                         }
1012
1013                         file << indent << "struct " << **sym->name << " {\n";
1014                         downscope();
1015
1016                         for (Enum::entries_iterator i = sym->entries_begin();
1017                              i != sym->entries_end(); ++i)
1018                         {
1019                                 Datum *d = *i;
1020
1021                                 file << indent << "static const uint"
1022                                      << round_up_bits(sym->def.bits) << "_t "
1023                                      << **d->name << " = " << d->def.ucon << ";\n";
1024                         }
1025
1026                         file << '\n' << indent << "unsigned int _val;\n\n";
1027
1028                         file << indent << **sym->name << "()\n"
1029                              << indent << "{\n"
1030                              << indent << "\t_val = 0;\n"
1031                              << indent << "}\n\n";
1032
1033                         file << indent << **sym->name << "(unsigned int val)\n"
1034                              << indent << "{\n"
1035                              << indent << "\t_val = val;\n"
1036                              << indent << "}\n\n";
1037
1038                         file << indent << "operator unsigned int()\n"
1039                              << indent << "{\n"
1040                              << indent << "\treturn _val;\n"
1041                              << indent << "}\n\n";
1042
1043                         upscope();
1044                         file << indent << "};\n";
1045
1046                         if (do_ns_out)
1047                                 ns_out(sym);
1048
1049                         break;
1050                 }
1051
1052                 case trav_full:
1053                         // Nothing particular to do here, other than to make sure
1054                         // that trav_forward has happened (which will always need to
1055                         // be done here if it's not a nested type).
1056
1057                         output_pass(sym, trav_forward);
1058                         break;
1059
1060                 default:
1061                         BUG();
1062         }
1063 }
1064
1065 void CPPFile::output(BasicType *sym, int pass, void *arg2)
1066 {
1067         switch (pass) {
1068                 case trav_nsdecl:
1069                         /* no-op */
1070                         break;
1071
1072                 case trav_forward: {
1073                         bool do_ns_out = false;
1074
1075                         if (indent.indent_level == 0) {
1076                                 ns_in(sym);
1077                                 do_ns_out = true;
1078                         } else {
1079                                 extra_newline();
1080                         }
1081
1082                         file << indent << "typedef ";
1083                         assert(!is_array(sym->def));
1084                         cpp_output_type(file, sym->def, false);
1085                         file << **sym->name << ";\n";
1086
1087                         if (do_ns_out)
1088                                 ns_out(sym);
1089
1090                         break;
1091                 }
1092
1093                 case trav_full:
1094                         output_pass(sym, trav_forward);
1095                         break;
1096
1097                 default:
1098                         BUG();
1099         }
1100 }
1101
1102 void CPPFile::output(Alias *sym, int pass, void *arg2)
1103 {
1104         switch (pass) {
1105                 case trav_nsdecl:
1106                         /* no-op */
1107                         break;
1108
1109                 case trav_forward: {
1110                         bool do_ns_out = false;
1111
1112                         if (indent.indent_level == 0) {
1113                                 all_ns_in(sym);
1114                                 do_ns_out = true;
1115                         } else {
1116                                 extra_newline();
1117                         }
1118
1119                         const String *type = sym->get_concrete_sym()->get_fq_name("_ns")
1120                                                 ->flatten("::");
1121
1122                         file << indent << "typedef " << *type << " "
1123                              << **sym->name << ";\n";
1124
1125                         if (do_ns_out)
1126                                 all_ns_out(sym);
1127
1128                         break;
1129                 }
1130
1131                 case trav_full:
1132                         output_pass(sym, trav_forward);
1133                         break;
1134
1135                 default:
1136                         BUG();
1137         }
1138 }
1139
1140 void CPPFile::output(TypeDef *sym, int pass, void *arg2)
1141 {
1142         switch (pass) {
1143                 case trav_nsdecl:
1144                 case trav_forward:
1145                         /* no-op */
1146                         break;
1147
1148                 case trav_full: {
1149                         output_pass(sym->get_concrete_sym(), trav_forward);
1150
1151                         bool do_ns_out = false;
1152
1153                         if (indent.indent_level == 0) {
1154                                 all_ns_in(sym);
1155                                 do_ns_out = true;
1156                         } else {
1157                                 extra_newline();
1158                         }
1159
1160                         const String *type = sym->get_concrete_sym()->get_fq_name("_ns")
1161                                                 ->flatten("::");
1162
1163                         file << indent << "typedef " << *type << " "
1164                              << **sym->name << ";\n";
1165
1166                         if (do_ns_out)
1167                                 all_ns_out(sym);
1168
1169                         break;
1170                 }
1171
1172                 default:
1173                         BUG();
1174         }
1175 }
1176
1177 void CPPFile::output(Datum *sym, int pass, void *arg2)
1178 {
1179         assert(sym->def.flags.field.Const);
1180
1181         switch (pass) {
1182                 case trav_nsdecl:
1183                 case trav_forward:
1184                         /* no-op */
1185                         break;
1186
1187                 case trav_full: {
1188                         if (sym->type)
1189                                 declare_type_dependency(sym->type, false);
1190
1191                         bool do_ns_out = false;
1192
1193                         if (indent.indent_level == 0) {
1194                                 all_ns_in(sym);
1195                                 do_ns_out = true;
1196                         } else {
1197                                 extra_newline();
1198                         }
1199
1200                         file << indent << "static const ";
1201
1202                         assert(!is_array(sym->def.basictype));
1203
1204                         if (sym->type)
1205                                 cpp_output_type(file, sym->type, false, false);
1206                         else
1207                                 cpp_output_type(file, sym->def.basictype, false);
1208
1209                         file << **sym->name << " = ";
1210
1211                         CompiledBasicType *def;
1212                         if (sym->type) {
1213                                 Symbol *real_type = sym->type->get_concrete_sym();
1214                                 BasicType *bt = dynamic_cast<BasicType *>(real_type);
1215                                 assert(bt);
1216
1217                                 def = &bt->def;
1218                         } else {
1219                                 def = &sym->def.basictype;
1220                         }
1221
1222                         if (def->flags.field.Float) {
1223                                 file << sym->def.fcon;
1224                         } else if (def->flags.field.Bool) {
1225                                 if (sym->def.ucon == 0)
1226                                         file << "false";
1227                                 else
1228                                         file << "true";
1229                         } else {
1230                                 if (def->flags.field.Unsigned) {
1231                                         file << "0x" << std::hex << sym->def.ucon << std::dec << 'U';
1232                                 } else {
1233                                         file << sym->def.icon;
1234                                 }
1235
1236                                 file << "LL";
1237                         }
1238
1239                         file << ";\n";
1240
1241                         if (do_ns_out)
1242                                 all_ns_out(sym);
1243
1244                         break;
1245                 }
1246
1247                 default:
1248                         BUG();
1249         }
1250 }
1251
1252 void CPPBinding::output_root(UserNameSpace *ns, const char *dir)
1253 {
1254         delete new CPPFile(ns, dir);
1255 }