granicus.if.org Git - icinga2/blob - tools/mkclass/classcompiler.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/)   *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "classcompiler.h"
  21 #include <iostream>
  22 #include <fstream>
  23 #include <stdexcept>
  24 #include <map>
  25 #include <vector>
  26
  27 using namespace icinga;
  28
  29 ClassCompiler::ClassCompiler(const std::string& path, std::istream *input)
  30         : m_Path(path), m_Input(input)
  31 {
  32         InitializeScanner();
  33 }
  34
  35 ClassCompiler::~ClassCompiler(void)
  36 {
  37         DestroyScanner();
  38 }
  39
  40 std::string ClassCompiler::GetPath(void) const
  41 {
  42         return m_Path;
  43 }
  44
  45 void *ClassCompiler::GetScanner(void)
  46 {
  47         return m_Scanner;
  48 }
  49
  50 size_t ClassCompiler::ReadInput(char *buffer, size_t max_size)
  51 {
  52         m_Input->read(buffer, max_size);
  53         return static_cast<size_t>(m_Input->gcount());
  54 }
  55
  56 void ClassCompiler::HandleInclude(const std::string& path, const ClassDebugInfo& locp)
  57 {
  58         std::cout << "#include \"" << path << "\"" << std::endl << std::endl;
  59 }
  60
  61 void ClassCompiler::HandleAngleInclude(const std::string& path, const ClassDebugInfo& locp)
  62 {
  63         std::cout << "#include <" << path << ">" << std::endl << std::endl;
  64 }
  65
  66 void ClassCompiler::HandleNamespaceBegin(const std::string& name, const ClassDebugInfo& locp)
  67 {
  68         std::cout << "namespace " << name << std::endl
  69                           << "{" << std::endl << std::endl;
  70 }
  71
  72 void ClassCompiler::HandleNamespaceEnd(const ClassDebugInfo& locp)
  73 {
  74         std::cout << "}" << std::endl;
  75 }
  76
  77 void ClassCompiler::HandleCode(const std::string& code, const ClassDebugInfo& locp)
  78 {
  79         std::cout << code << std::endl;
  80 }
  81
  82 unsigned long ClassCompiler::SDBM(const std::string& str, size_t len = std::string::npos)
  83 {
  84         unsigned long hash = 0;
  85         size_t current = 0;
  86
  87         std::string::const_iterator it;
  88
  89         for (it = str.begin(); it != str.end(); it++) {
  90                 if (current >= len)
  91                         break;
  92
  93                 char c = *it;
  94
  95                 hash = c + (hash << 6) + (hash << 16) - hash;
  96
  97                 current++;
  98         }
  99
 100         return hash;
 101 }
 102
 103 void ClassCompiler::HandleClass(const Klass& klass, const ClassDebugInfo& locp)
 104 {
 105         std::vector<Field>::const_iterator it;
 106
 107         /* forward declaration */
 108         if (klass.Name.find_first_of(':') == std::string::npos)
 109                 std::cout << "class " << klass.Name << ";" << std::endl << std::endl;
 110
 111         /* TypeImpl */
 112         std::cout << "template<>" << std::endl
 113                 << "class TypeImpl<" << klass.Name << ">"
 114                 << " : public Type" << std::endl
 115                 << "{" << std::endl
 116                 << "public:" << std::endl;
 117
 118         /* GetName */
 119         std::cout << "\t" << "virtual String GetName(void) const" << std::endl
 120                   << "\t" << "{" << std::endl
 121                   << "\t\t" << "return \"" << klass.Name << "\";" << std::endl
 122                   << "\t" << "}" << std::endl << std::endl;
 123
 124         /* IsAbstract */
 125         std::cout << "\t" << "virtual bool IsAbstract(void) const" << std::endl
 126                   << "\t" << "{" << std::endl
 127                   << "\t\t" << "return " << (klass.Abstract ? "true" : "false") << ";" << std::endl
 128                   << "\t" << "}" << std::endl << std::endl;
 129
 130         /* GetBaseType */
 131         std::cout << "\t" << "virtual const Type *GetBaseType(void) const" << std::endl
 132                 << "\t" << "{" << std::endl;
 133
 134         std::cout << "\t\t" << "return ";
 135
 136         if (!klass.Parent.empty())
 137                 std::cout << "Type::GetByName(\"" << klass.Parent << "\")";
 138         else
 139                 std::cout << "NULL";
 140
 141         std::cout << ";" << std::endl
 142                           << "\t" << "}" << std::endl << std::endl;
 143
 144         /* GetFieldId */
 145         std::cout << "\t" << "virtual int GetFieldId(const String& name) const" << std::endl
 146                 << "\t" << "{" << std::endl
 147                 << "\t\t" << "return StaticGetFieldId(name);" << std::endl
 148                 << "\t" << "}" << std::endl << std::endl;
 149
 150         /* StaticGetFieldId */
 151         std::cout << "\t" << "static int StaticGetFieldId(const String& name)" << std::endl
 152                 << "\t" << "{" << std::endl
 153                 << "\t\t" << "int offset = ";
 154
 155         if (!klass.Parent.empty())
 156                 std::cout << "TypeImpl<" << klass.Parent << ">::StaticGetFieldCount()";
 157         else
 158                 std::cout << "0";
 159
 160         std::cout << ";" << std::endl << std::endl;
 161
 162         std::map<int, std::vector<std::pair<int, std::string> > > jumptable;
 163
 164         int hlen = 0, collisions = 0;
 165
 166         do {
 167                 int num = 0;
 168
 169                 hlen++;
 170                 jumptable.clear();
 171                 collisions = 0;
 172
 173                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 174                         int hash = static_cast<int>(SDBM(it->Name, hlen));
 175                         jumptable[hash].push_back(std::make_pair(num, it->Name));
 176                         num++;
 177
 178                         if (jumptable[hash].size() > 1)
 179                                 collisions++;
 180                 }
 181         } while (collisions >= 5 && hlen < 8);
 182
 183         if (!klass.Fields.empty()) {
 184                 std::cout << "\t\tswitch (static_cast<int>(Utility::SDBM(name, " << hlen << "))) {" << std::endl;
 185
 186                 std::map<int, std::vector<std::pair<int, std::string> > >::const_iterator itj;
 187
 188                 for (itj = jumptable.begin(); itj != jumptable.end(); itj++) {
 189                         std::cout << "\t\t\tcase " << itj->first << ":" << std::endl;
 190
 191                         std::vector<std::pair<int, std::string> >::const_iterator itf;
 192
 193                         for (itf = itj->second.begin(); itf != itj->second.end(); itf++) {
 194                                 std::cout << "\t\t\t\t" << "if (name == \"" << itf->second << "\")" << std::endl
 195                                         << "\t\t\t\t\t" << "return offset + " << itf->first << ";" << std::endl;
 196                         }
 197
 198                         std::cout << std::endl
 199                                   << "\t\t\t\tbreak;" << std::endl;
 200                 }
 201
 202                 std::cout << "\t\t}" << std::endl;
 203         }
 204
 205         std::cout << std::endl
 206                 << "\t\t" << "return ";
 207
 208         if (!klass.Parent.empty())
 209                 std::cout << "TypeImpl<" << klass.Parent << ">::StaticGetFieldId(name)";
 210         else
 211                 std::cout << "-1";
 212
 213         std::cout << ";" << std::endl
 214                 << "\t" << "}" << std::endl << std::endl;
 215
 216         /* GetFieldInfo */
 217         std::cout << "\t" << "virtual Field GetFieldInfo(int id) const" << std::endl
 218                 << "\t" << "{" << std::endl
 219                 << "\t\t" << "return StaticGetFieldInfo(id);" << std::endl
 220                 << "\t" << "}" << std::endl << std::endl;
 221
 222         /* StaticGetFieldInfo */
 223         std::cout << "\t" << "static Field StaticGetFieldInfo(int id)" << std::endl
 224                 << "\t" << "{" << std::endl;
 225
 226         if (!klass.Parent.empty())
 227                 std::cout << "\t\t" << "int real_id = id - " << "TypeImpl<" << klass.Parent << ">::StaticGetFieldCount();" << std::endl
 228                 << "\t\t" << "if (real_id < 0) { return " << "TypeImpl<" << klass.Parent << ">::StaticGetFieldInfo(id); }" << std::endl;
 229
 230         if (klass.Fields.size() > 0) {
 231                 std::cout << "\t\t" << "switch (";
 232
 233                 if (!klass.Parent.empty())
 234                         std::cout << "real_id";
 235                 else
 236                         std::cout << "id";
 237
 238                 std::cout << ") {" << std::endl;
 239
 240                 size_t num = 0;
 241                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 242                         std::cout << "\t\t\t" << "case " << num << ":" << std::endl
 243                                 << "\t\t\t\t" << "return Field(" << num << ", \"" << it->Name << "\", " << it->Attributes << ");" << std::endl;
 244                         num++;
 245                 }
 246
 247                 std::cout << "\t\t\t" << "default:" << std::endl
 248                                   << "\t\t";
 249         }
 250
 251         std::cout << "\t\t" << "throw std::runtime_error(\"Invalid field ID.\");" << std::endl;
 252
 253         if (klass.Fields.size() > 0)
 254                 std::cout << "\t\t" << "}" << std::endl;
 255
 256         std::cout << "\t" << "}" << std::endl << std::endl;
 257
 258         /* GetFieldCount */
 259         std::cout << "\t" << "virtual int GetFieldCount(void) const" << std::endl
 260                 << "\t" << "{" << std::endl
 261                 << "\t\t" << "return StaticGetFieldCount();" << std::endl
 262                 << "\t" << "}" << std::endl << std::endl;
 263
 264         /* StaticGetFieldCount */
 265         std::cout << "\t" << "static int StaticGetFieldCount(void)" << std::endl
 266                 << "\t" << "{" << std::endl
 267                 << "\t\t" << "return " << klass.Fields.size();
 268
 269         if (!klass.Parent.empty())
 270                 std::cout << " + " << "TypeImpl<" << klass.Parent << ">::StaticGetFieldCount()";
 271
 272         std::cout << ";" << std::endl
 273                 << "\t" << "}" << std::endl << std::endl;
 274
 275         std::cout << "};" << std::endl << std::endl;
 276
 277         /* ObjectImpl */
 278         std::cout << "template<>" << std::endl
 279                   << "class ObjectImpl<" << klass.Name << ">"
 280                   << " : public " << (klass.Parent.empty() ? "Object" : klass.Parent) << std::endl
 281                   << "{" << std::endl
 282                   << "public:" << std::endl
 283                   << "\t" << "DECLARE_PTR_TYPEDEFS(ObjectImpl<" << klass.Name << ">);" << std::endl << std::endl;
 284
 285         /* GetReflectionType */
 286         std::cout << "\t" << "virtual const Type *GetReflectionType(void) const" << std::endl
 287                           << "\t" << "{" << std::endl
 288                           << "\t\t" << "return Type::GetByName(\"" << klass.Name << "\");" << std::endl
 289                           << "\t" << "}" << std::endl << std::endl;
 290
 291         if (!klass.Fields.empty()) {
 292                 /* constructor */
 293                 std::cout << "public:" << std::endl
 294                           << "\t" << "ObjectImpl<" << klass.Name << ">(void)" << std::endl
 295                           << "\t" << "{" << std::endl;
 296
 297                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 298                         std::cout << "\t\t" << "Set" << it->GetFriendlyName() << "(" << "GetDefault" << it->GetFriendlyName() << "());" << std::endl;
 299                 }
 300
 301                 std::cout << "\t" << "}" << std::endl << std::endl;
 302
 303                 /* SetField */
 304                 std::cout << "protected:" << std::endl
 305                                   << "\t" << "virtual void SetField(int id, const Value& value)" << std::endl
 306                                   << "\t" << "{" << std::endl;
 307
 308                 if (!klass.Parent.empty())
 309                         std::cout << "\t\t" << "int real_id = id - TypeImpl<" << klass.Parent << ">::StaticGetFieldCount(); " << std::endl
 310                                   << "\t\t" << "if (real_id < 0) { " << klass.Parent << "::SetField(id, value); return; }" << std::endl;
 311
 312                 std::cout << "\t\t" << "switch (";
 313
 314                 if (!klass.Parent.empty())
 315                         std::cout << "real_id";
 316                 else
 317                         std::cout << "id";
 318
 319                 std::cout << ") {" << std::endl;
 320
 321                 size_t num = 0;
 322                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 323                         std::cout << "\t\t\t" << "case " << num << ":" << std::endl
 324                                           << "\t\t\t\t" << "Set" << it->GetFriendlyName() << "(";
 325
 326                         if (it->Attributes & FAEnum)
 327                                 std::cout << "static_cast<" << it->Type << ">(static_cast<int>(";
 328
 329                         std::cout << "value";
 330
 331                         if (it->Attributes & FAEnum)
 332                                 std::cout << "))";
 333
 334                         std::cout << ");" << std::endl
 335                                           << "\t\t\t\t" << "break;" << std::endl;
 336                         num++;
 337                 }
 338
 339                 std::cout << "\t\t\t" << "default:" << std::endl
 340                                   << "\t\t\t\t" << "throw std::runtime_error(\"Invalid field ID.\");" << std::endl
 341                                   << "\t\t" << "}" << std::endl;
 342
 343                 std::cout << "\t" << "}" << std::endl << std::endl;
 344
 345                 /* GetField */
 346                 std::cout << "protected:" << std::endl
 347                                   << "\t" << "virtual Value GetField(int id) const" << std::endl
 348                                   << "\t" << "{" << std::endl;
 349
 350                 if (!klass.Parent.empty())
 351                         std::cout << "\t\t" << "int real_id = id - TypeImpl<" << klass.Parent << ">::StaticGetFieldCount(); " << std::endl
 352                                           << "\t\t" << "if (real_id < 0) { return " << klass.Parent << "::GetField(id); }" << std::endl;
 353
 354                 std::cout << "\t\t" << "switch (";
 355
 356                 if (!klass.Parent.empty())
 357                         std::cout << "real_id";
 358                 else
 359                         std::cout << "id";
 360
 361                 std::cout << ") {" << std::endl;
 362
 363                 num = 0;
 364                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 365                         std::cout << "\t\t\t" << "case " << num << ":" << std::endl
 366                                           << "\t\t\t\t" << "return Get" << it->GetFriendlyName() << "();" << std::endl;
 367                         num++;
 368                 }
 369
 370                 std::cout << "\t\t\t" << "default:" << std::endl
 371                                   << "\t\t\t\t" << "throw std::runtime_error(\"Invalid field ID.\");" << std::endl
 372                                   << "\t\t" << "}" << std::endl;
 373
 374                 std::cout << "\t" << "}" << std::endl << std::endl;
 375
 376                 /* getters */
 377                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 378                         std::string prot;
 379
 380                         if (it->Attributes & FAGetProtected)
 381                                 prot = "protected";
 382                         else
 383                                 prot = "public";
 384
 385                         std::cout << prot << ":" << std::endl
 386                                           << "\t" << it->Type << " Get" << it->GetFriendlyName() << "(void) const" << std::endl
 387                                           << "\t" << "{" << std::endl;
 388
 389                         if (it->GetAccessor.empty())
 390                                 std::cout << "\t\t" << "return m_" << it->GetFriendlyName() << ";" << std::endl;
 391                         else
 392                                 std::cout << it->GetAccessor << std::endl;
 393
 394                         std::cout << "\t" << "}" << std::endl << std::endl;
 395                 }
 396
 397                 /* setters */
 398                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 399                         std::string prot;
 400
 401                         if (it->Attributes & FASetProtected)
 402                                 prot = "protected";
 403                         else if (it->Attributes & FAConfig)
 404                                 prot = "private";
 405                         else
 406                                 prot = "public";
 407
 408                         std::cout << prot << ":" << std::endl
 409                                           << "\t" << "void Set" << it->GetFriendlyName() << "(const " << it->Type << "& value)" << std::endl
 410                                           << "\t" << "{" << std::endl;
 411
 412                         if (it->SetAccessor.empty())
 413                                 std::cout << "\t\t" << "m_" << it->GetFriendlyName() << " = value;" << std::endl;
 414                         else
 415                                 std::cout << it->SetAccessor << std::endl;
 416
 417                         std::cout << "\t" << "}" << std::endl << std::endl;
 418                 }
 419
 420                 /* default */
 421                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 422                         std::string prot;
 423
 424                         std::cout << "private:" << std::endl
 425                                           << "\t" << it->Type << " GetDefault" << it->GetFriendlyName() << "(void) const" << std::endl
 426                                           << "\t" << "{" << std::endl;
 427
 428                         if (it->DefaultAccessor.empty())
 429                                 std::cout << "\t\t" << "return " << it->Type << "();" << std::endl;
 430                         else
 431                                 std::cout << it->DefaultAccessor << std::endl;
 432
 433                         std::cout << "\t" << "}" << std::endl;
 434                 }
 435
 436                 /* instance variables */
 437                 std::cout << "private:" << std::endl;
 438
 439                 for (it = klass.Fields.begin(); it != klass.Fields.end(); it++) {
 440                         std::cout << "\t" << it->Type << " m_" << it->GetFriendlyName() << ";" << std::endl;
 441                 }
 442         }
 443
 444         std::cout << "};" << std::endl << std::endl;
 445
 446         /* FactoryHelper */
 447         if (klass.Abstract) {
 448                 std::cout << "template<>" << std::endl
 449                           << "struct FactoryHelper<" << klass.Name << ">" << std::endl
 450                           << "{" << std::endl
 451                           << "\t" << "Type::Factory GetFactory(void)" << std::endl
 452                           << "\t" << "{" << std::endl
 453                           << "\t\t" << "return Type::Factory();"
 454                           << "\t" << "}"
 455                           << "};" << std::endl << std::endl;
 456         }
 457 }
 458
 459 void ClassCompiler::CompileFile(const std::string& path)
 460 {
 461         std::ifstream stream;
 462         stream.open(path.c_str(), std::ifstream::in);
 463
 464         if (!stream)
 465                 throw std::invalid_argument("Could not open config file: " + path);
 466
 467         return CompileStream(path, &stream);
 468 }
 469
 470 void ClassCompiler::CompileStream(const std::string& path, std::istream *stream)
 471 {
 472         stream->exceptions(std::istream::badbit);
 473
 474         std::cout << "#include \"base/object.h\"" << std::endl
 475                           << "#include \"base/type.h\"" << std::endl
 476                           << "#include \"base/debug.h\"" << std::endl
 477                           << "#include \"base/value.h\"" << std::endl
 478                           << "#include \"base/array.h\"" << std::endl
 479                           << "#include \"base/dictionary.h\"" << std::endl
 480                           << "#include \"base/utility.h\"" << std::endl << std::endl
 481                           << "#ifdef _MSC_VER" << std::endl
 482                           << "#pragma warning( push )" << std::endl
 483                           << "#pragma warning( disable : 4244 )" << std::endl
 484                           << "#pragma warning( disable : 4800 )" << std::endl
 485                           << "#endif /* _MSC_VER */" << std::endl << std::endl;
 486
 487         ClassCompiler ctx(path, stream);
 488         ctx.Compile();
 489
 490         std::cout << "#ifdef _MSC_VER" << std::endl
 491                           << "#pragma warning ( pop )" << std::endl
 492                           << "#endif /* _MSC_VER */" << std::endl;
 493 }