src/loader/Interpreter.cpp

   1 /*
   2  * Interpreter.cpp
   3  *
   4  *  Created on: Aug 26, 2012
   5  *      Author: holy
   6  */
   7
   8 #include "Interpreter.h"
   9
  10 #include "ParsedSource.h"
  11 #include "../battle/Hero.h"
  12 #include "../battle/Monster.h"
  13 #include "../battle/PartyLayout.h"
  14 #include "../battle/Resources.h"
  15 #include "../common/Ikari.h"
  16 #include "../common/Item.h"
  17 #include "../common/Spell.h"
  18 #include "../common/TargetingMode.h"
  19 #include "../graphics/ComplexAnimation.h"
  20 #include "../graphics/Font.h"
  21 #include "../graphics/Frame.h"
  22 #include "../graphics/Gauge.h"
  23 #include "../graphics/Menu.h"
  24 #include "../graphics/SimpleAnimation.h"
  25 #include "../graphics/Sprite.h"
  26
  27 #include <algorithm>
  28 #include <cstring>
  29 #include <SDL_image.h>
  30
  31 using battle::Hero;
  32 using battle::Monster;
  33 using battle::PartyLayout;
  34 using battle::Stats;
  35 using common::Ikari;
  36 using common::Item;
  37 using common::Spell;
  38 using common::TargetingMode;
  39 using graphics::Animation;
  40 using graphics::Color;
  41 using graphics::Font;
  42 using graphics::Frame;
  43 using graphics::Gauge;
  44 using graphics::ComplexAnimation;
  45 using graphics::SimpleAnimation;
  46 using graphics::Sprite;
  47 using geometry::Vector;
  48 using std::make_pair;
  49 using std::map;
  50 using std::set;
  51 using std::string;
  52 using std::vector;
  53
  54 namespace loader {
  55
  56 Interpreter::~Interpreter() {
  57         for (vector<PostponedDefinition>::const_iterator i(postponedDefinitions.begin()), end(postponedDefinitions.end()); i != end; ++i) {
  58                 delete i->identifier;
  59         }
  60         for (map<string, SDL_Surface *>::const_iterator i(imageCache.begin()), end(imageCache.end()); i != end; ++i) {
  61                 SDL_FreeSurface(i->second);
  62         }
  63         // TODO: maybe need to reverse the array deletion check if most objects turn out to be arrays (of char)
  64         for (map<int, vector<void *> >::const_iterator i(values.begin()), end(values.end()); i != end; ++i) {
  65                 for (vector<void *>::const_iterator j(i->second.begin()), end(i->second.end()); j != end; ++j) {
  66                         delete[] reinterpret_cast<char *>(*j);
  67                 }
  68         }
  69 }
  70
  71
  72 const Interpreter::ParsedDefinition &Interpreter::GetDefinition(const string &identifier) const {
  73         try {
  74                 return parsedDefinitions.at(identifier);
  75         } catch (...) {
  76                 throw std::runtime_error("cannot find definition for " + identifier);
  77         }
  78 }
  79
  80
  81 void *Interpreter::GetObject(int typeId, const std::string &name) {
  82         map<string, ParsedDefinition>::const_iterator i(parsedDefinitions.find(name));
  83         if (i != parsedDefinitions.end()) {
  84                 const TypeDescription &requested(TypeDescription::Get(typeId));
  85                 const TypeDescription &actual(TypeDescription::Get(i->second.type));
  86                 if (requested.TypeId() == actual.TypeId()) {
  87                         return values[actual.TypeId()][i->second.id];
  88                 } else if (actual.IsSubtypeOf(requested)) {
  89                         char *sub(reinterpret_cast<char *>(values[actual.TypeId()][i->second.id]));
  90                         std::ptrdiff_t offset(actual.SupertypeOffset(requested));
  91                         return sub - offset;
  92                 } else {
  93                         throw Error("cannot cast " + actual.TypeName() + " to " + requested.TypeName());
  94                 }
  95         } else {
  96                 throw Error("access to undefined object " + name);
  97         }
  98 }
  99
 100
 101 void Interpreter::ReadSource() {
 102         for (set<string>::const_iterator i(source.Exports().begin()), end(source.Exports().end()); i != end; ++i) {
 103                 ReadDefinition(source.GetDefinition(*i));
 104         }
 105 }
 106
 107 void Interpreter::ReadDefinition(const Definition &dfn) {
 108         if (parsedDefinitions.find(dfn.Identifier()) != parsedDefinitions.end()) {
 109                 return;
 110         }
 111         if (dfn.HasLiteralValue()) {
 112                 ReadLiteral(dfn);
 113         } else {
 114                 ReadObject(dfn);
 115         }
 116 }
 117
 118 void Interpreter::ReadLiteral(const Definition &dfn) {
 119         const string &typeName(dfn.GetLiteral()->IsArray() ? "Array" : dfn.GetLiteral()->GetTypeName());
 120         int typeId(TypeDescription::GetTypeId(typeName));
 121         int id(values[typeId].size());
 122         const TypeDescription &td(TypeDescription::Get(typeId));
 123         int size(
 124                         (dfn.GetLiteral()->GetType() == Literal::PATH
 125                                         || dfn.GetLiteral()->GetType() == Literal::STRING)
 126                         ? dfn.GetLiteral()->GetString().size() : td.Size());
 127         char *object(new char[size]);
 128         if (dfn.GetLiteral()->GetType() == Literal::OBJECT) {
 129                 ReadObject(typeId, id, object, *dfn.GetLiteral()->GetProperties());
 130         } else {
 131                 ReadLiteral(typeId, id, object, *dfn.GetLiteral());
 132         }
 133         values[typeId].push_back(object);
 134         parsedDefinitions.insert(make_pair(dfn.Identifier(), ParsedDefinition(&dfn, typeId, id)));
 135 }
 136
 137 void Interpreter::ReadLiteral(int typeId, int id, char *object, const Literal &literal) {
 138         switch (literal.GetType()) {
 139                 case Literal::ARRAY_VALUES:
 140                         throw Error("named value arrays are not supported, sorry");
 141                         break;
 142                 case Literal::ARRAY_PROPS:
 143                         throw Error("named property list arrays are not supported, sorry");
 144                         break;
 145                 case Literal::BOOLEAN:
 146                         new (object) bool(literal.GetBoolean());
 147                         break;
 148                 case Literal::COLOR:
 149                         new (object) Color(literal.GetRed(), literal.GetGreen(), literal.GetBlue(), literal.GetAlpha());
 150                         break;
 151                 case Literal::NUMBER:
 152                         new (object) int(literal.GetNumber());
 153                         break;
 154                 case Literal::PATH:
 155                         std::memcpy(object, literal.GetString().c_str(), literal.GetString().size());
 156                         object[literal.GetString().size()] = '\0';
 157                         break;
 158                 case Literal::STRING:
 159                         std::memcpy(object, literal.GetString().c_str(), literal.GetString().size());
 160                         object[literal.GetString().size()] = '\0';
 161                         break;
 162                 case Literal::VECTOR:
 163                         new (object) Vector<int>(literal.GetX(), literal.GetY());
 164                         break;
 165                 case Literal::OBJECT:
 166                         throw Error("illogical branch: read literal object as non-object literal");
 167                         break;
 168         }
 169 }
 170
 171
 172 void *Interpreter::GetObject(int typeId, const Value &v) {
 173         if (v.IsLiteral()) {
 174                 if (v.GetLiteral().IsObject()) {
 175                         int typeId(TypeDescription::GetTypeId(v.GetLiteral().GetTypeName()));
 176                         const TypeDescription &td(TypeDescription::Get(typeId));
 177                         char *object(new char[td.Size()]);
 178                         td.Construct(object);
 179                         int id(values[typeId].size());
 180                         values[typeId].push_back(object);
 181                         ReadObject(typeId, id, object, *v.GetLiteral().GetProperties());
 182                         return object;
 183                 } else {
 184                         int typeId(0), id(0);
 185                         switch (v.GetLiteral().GetType()) {
 186                                 case Literal::ARRAY_VALUES:
 187                                         throw Error("cannot copy value arrays, sorry");
 188                                         break;
 189                                 case Literal::ARRAY_PROPS:
 190                                         throw Error("cannot copy property list arrays, sorry");
 191                                         break;
 192                                 case Literal::BOOLEAN:
 193                                         {
 194                                                 typeId = TypeDescription::GetTypeId("Boolean");
 195                                                 id = values[typeId].size();
 196                                                 const TypeDescription &td(TypeDescription::Get(typeId));
 197                                                 char *object(new char[td.Size()]);
 198                                                 values[typeId].push_back(new (object) bool(v.GetLiteral().GetBoolean()));
 199                                         }
 200                                         break;
 201                                 case Literal::COLOR:
 202                                         {
 203                                                 typeId = TypeDescription::GetTypeId("Color");
 204                                                 id = values[typeId].size();
 205                                                 const TypeDescription &td(TypeDescription::Get(typeId));
 206                                                 char *object(new char[td.Size()]);
 207                                                 values[typeId].push_back(new (object) Color(v.GetLiteral().GetRed(), v.GetLiteral().GetGreen(), v.GetLiteral().GetBlue(), v.GetLiteral().GetAlpha()));
 208                                         }
 209                                         break;
 210                                 case Literal::NUMBER:
 211                                         {
 212                                                 typeId = TypeDescription::GetTypeId("Number");
 213                                                 id = values[typeId].size();
 214                                                 const TypeDescription &td(TypeDescription::Get(typeId));
 215                                                 char *object(new char[td.Size()]);
 216                                                 values[typeId].push_back(new (object) int(v.GetLiteral().GetNumber()));
 217                                         }
 218                                         break;
 219                                 case Literal::PATH:
 220                                         {
 221                                                 typeId = TypeDescription::GetTypeId("Path");
 222                                                 id = values[typeId].size();
 223                                                 char *str(new char[v.GetLiteral().GetString().size() + 1]);
 224                                                 std::memcpy(str, v.GetLiteral().GetString().c_str(), v.GetLiteral().GetString().size());
 225                                                 str[v.GetLiteral().GetString().size()] = '\0';
 226                                                 values[typeId].push_back(str);
 227                                         }
 228                                         break;
 229                                 case Literal::STRING:
 230                                         {
 231                                                 typeId = TypeDescription::GetTypeId("String");
 232                                                 id = values[typeId].size();
 233                                                 char *str(new char[v.GetLiteral().GetString().size() + 1]);
 234                                                 std::memcpy(str, v.GetLiteral().GetString().c_str(), v.GetLiteral().GetString().size());
 235                                                 str[v.GetLiteral().GetString().size()] = '\0';
 236                                                 values[typeId].push_back(str);
 237                                         }
 238                                         break;
 239                                 case Literal::VECTOR:
 240                                         {
 241                                                 typeId = TypeDescription::GetTypeId("Vector");
 242                                                 id = values[typeId].size();
 243                                                 const TypeDescription &td(TypeDescription::Get(typeId));
 244                                                 char *object(new char[td.Size()]);
 245                                                 values[typeId].push_back(new (object) Vector<int>(v.GetLiteral().GetX(), v.GetLiteral().GetY()));
 246                                         }
 247                                         break;
 248                                 case Literal::OBJECT:
 249                                         {
 250                                                 typeId = TypeDescription::GetTypeId(v.GetLiteral().GetTypeName());
 251                                                 const TypeDescription &td(TypeDescription::Get(typeId));
 252                                                 id = values[typeId].size();
 253                                                 char *object(new char[td.Size()]);
 254                                                 td.Construct(object);
 255                                                 ReadObject(typeId, id, object, *v.GetLiteral().GetProperties());
 256                                         }
 257                                         break;
 258                         }
 259                         return values[typeId][id];
 260                 }
 261         } else {
 262                 ReadDefinition(source.GetDefinition(v.GetIdentifier()));
 263                 return GetObject(typeId, v.GetIdentifier());
 264         }
 265 }
 266
 267
 268 void Interpreter::ReadObject(const Definition &dfn) {
 269         int typeId(TypeDescription::GetTypeId(dfn.TypeName()));
 270         const TypeDescription &td(TypeDescription::Get(typeId));
 271         int id(values[typeId].size());
 272         char *object(new char[td.Size()]);
 273         td.Construct(object);
 274         values[typeId].push_back(object);
 275         ReadObject(typeId, id, object, *dfn.GetProperties());
 276         parsedDefinitions.insert(make_pair(dfn.Identifier(), ParsedDefinition(&dfn, typeId, id)));
 277 }
 278
 279
 280 void Interpreter::ReadObject(int typeId, int id, char *object, const PropertyList &props) {
 281         const TypeDescription &td(TypeDescription::Get(typeId));
 282         for (PropertyList::ConstIterator i(props.Begin()), end(props.End()); i != end; ++i) {
 283                 const FieldDescription &fd(td.GetField(i->first));
 284                 const TypeDescription &fieldType(TypeDescription::Get(fd.TypeId()));
 285                 if (CanLink(*i->second)) {
 286                         char *dest(object + fd.Offset());
 287                         if (fd.IsAggregate()) {
 288                                 int arraySize(i->second->GetLiteral().ArraySize());
 289                                 char *aggregate(new char[fieldType.Size() * arraySize]);
 290                                 char *iter(aggregate);
 291                                 if (i->second->GetLiteral().GetType() == Literal::ARRAY_PROPS) {
 292                                         const vector<PropertyList *> &list(i->second->GetLiteral().GetPropertyLists());
 293                                         for (vector<PropertyList *>::const_iterator j(list.begin()), end(list.end()); j != end; ++j, iter += fieldType.Size()) {
 294                                                 fieldType.Construct(iter);
 295                                                 ReadObject(fieldType.TypeId(), -1, iter, **j);
 296                                         }
 297                                 } else {
 298                                         const vector<Value *> &list(i->second->GetLiteral().GetValues());
 299                                         for (vector<Value *>::const_iterator j(list.begin()), end(list.end()); j != end; ++j, iter += fieldType.Size()) {
 300                                                 fieldType.Construct(iter);
 301                                                 ReadLiteral(fieldType.TypeId(), -1, iter, (*j)->GetLiteral());
 302                                         }
 303                                 }
 304                                 if (fd.IsReferenced()) {
 305                                         std::memcpy(dest, &aggregate, sizeof(char *));
 306                                         dest += sizeof(char *);
 307                                         std::memcpy(dest, &arraySize, sizeof(int));
 308                                 } else {
 309                                         throw Error("aggregate type fields must be referenced");
 310                                 }
 311                         } else {
 312                                 char *src(reinterpret_cast<char *>(GetObject(fd.TypeId(), *i->second)));
 313                                 if (fd.TypeId() == TypeDescription::GetTypeId("Image")) {
 314                                         src = reinterpret_cast<char *>(GetImage(src));
 315                                 }
 316                                 if (fd.IsReferenced()) {
 317                                         std::memcpy(dest, &src, sizeof(char *));
 318                                 } else {
 319                                         std::memcpy(dest, src, fieldType.Size());
 320                                 }
 321                         }
 322                 } else {
 323                         Postpone(typeId, id, fd.Offset(), i->second->GetIdentifier(), fd.TypeId(), !fd.IsReferenced());
 324                 }
 325         }
 326 }
 327
 328
 329 SDL_Surface *Interpreter::GetImage(const string &path) {
 330         map<string, SDL_Surface *>::const_iterator result(imageCache.find(path));
 331         if (result != imageCache.end()) {
 332                 return result->second;
 333         } else {
 334                 SDL_Surface *image(IMG_Load(path.c_str()));
 335                 imageCache.insert(make_pair(path, image));
 336                 return image;
 337         }
 338 }
 339
 340
 341 bool Interpreter::CanLink(const Value &v) const {
 342         return v.IsLiteral() || source.IsDefined(v.GetIdentifier());
 343 }
 344
 345 void Interpreter::Postpone(int type, int id, std::ptrdiff_t offset, const std::string &identifier, int linkedType, bool inlined) {
 346         char *str(new char[identifier.size() + 1]);
 347         std::memcpy(str, identifier.c_str(), identifier.size());
 348         str[identifier.size()] = '\0';
 349         postponedDefinitions.push_back(PostponedDefinition(type, id, offset, str, linkedType, inlined));
 350 }
 351
 352
 353 void Interpreter::CreateTypeDescriptions() {
 354         {
 355                 TypeDescription &td(TypeDescription::CreateOrGet("Boolean"));
 356                 td.SetSize(sizeof(bool));
 357         }
 358         {
 359                 TypeDescription &td(TypeDescription::CreateOrGet("Color"));
 360                 td.SetSize(sizeof(Color));
 361         }
 362         {
 363                 TypeDescription &td(TypeDescription::CreateOrGet("Image"));
 364                 td.SetSize(sizeof(SDL_Surface));
 365         }
 366         {
 367                 TypeDescription &td(TypeDescription::CreateOrGet("Number"));
 368                 td.SetSize(sizeof(int));
 369         }
 370         {
 371                 int stringId(TypeDescription::GetTypeId("String"));
 372                 TypeDescription &td(TypeDescription::CreateOrGet("Path"));
 373                 td.SetSize(1);
 374                 td.AddSupertype(stringId, 0);
 375         }
 376         {
 377                 TypeDescription &td(TypeDescription::CreateOrGet("String"));
 378                 td.SetSize(1);
 379         }
 380         {
 381                 TypeDescription &td(TypeDescription::CreateOrGet("Vector"));
 382                 td.SetSize(sizeof(Vector<int>));
 383         }
 384 }
 385
 386 }