]> git.localhorst.tv Git - l2e.git/blobdiff - src/loader/Interpreter.cpp
simplified definition postponing
[l2e.git] / src / loader / Interpreter.cpp
index 6bb022f1e4c6c46d354c1afc62fa6710be9da1e3..8b54fc177913de18a1266f885cc8e959b6eb4eef 100644 (file)
@@ -1,13 +1,7 @@
-/*
- * Interpreter.cpp
- *
- *  Created on: Aug 26, 2012
- *      Author: holy
- */
-
 #include "Interpreter.h"
 
 #include "ParsedSource.h"
+#include "TypeDescription.h"
 #include "../battle/Hero.h"
 #include "../battle/Monster.h"
 #include "../battle/PartyLayout.h"
@@ -47,7 +41,7 @@ using graphics::Gauge;
 using graphics::ComplexAnimation;
 using graphics::SimpleAnimation;
 using graphics::Sprite;
-using geometry::Vector;
+using math::Vector;
 using std::make_pair;
 using std::set;
 using std::string;
@@ -134,10 +128,9 @@ void Interpreter::ReadLiteral(const Definition &dfn) {
 void Interpreter::ReadLiteral(int typeId, int id, char *object, const Literal &literal) {
        switch (literal.GetType()) {
                case Literal::ARRAY_VALUES:
-                       throw Error("named value arrays are not supported, sorry");
-                       break;
                case Literal::ARRAY_PROPS:
-                       throw Error("named property list arrays are not supported, sorry");
+               case Literal::ARRAY_IDENTS:
+                       throw Error("named arrays are not supported, sorry");
                        break;
                case Literal::BOOLEAN:
                        new (object) bool(literal.GetBoolean());
@@ -184,10 +177,9 @@ void *Interpreter::GetObject(int typeId, const Value &v) {
                        int typeId(0), id(0);
                        switch (v.GetLiteral().GetType()) {
                                case Literal::ARRAY_VALUES:
-                                       throw Error("cannot copy value arrays, sorry");
-                                       break;
                                case Literal::ARRAY_PROPS:
-                                       throw Error("cannot copy property list arrays, sorry");
+                               case Literal::ARRAY_IDENTS:
+                                       throw Error("cannot copy arrays, sorry");
                                        break;
                                case Literal::BOOLEAN:
                                        {
@@ -294,28 +286,56 @@ void Interpreter::ReadObject(int typeId, int id, char *object, const PropertyLis
                        char *dest(object + fd.Offset());
                        if (fd.IsAggregate()) {
                                int arraySize(i->second->GetLiteral().ArraySize());
-                               char *aggregate(alloc.Alloc(fieldType.Size() * arraySize));
-                               char *iter(aggregate);
+                               size_t memberSize = fd.IsReferenced() ? sizeof(char *) : fieldType.Size();
+                               char *aggregate = alloc.Alloc(arraySize * memberSize);
+                               char *iter = aggregate;
                                if (i->second->GetLiteral().GetType() == Literal::ARRAY_PROPS) {
                                        const vector<PropertyList *> &list(i->second->GetLiteral().GetPropertyLists());
-                                       for (vector<PropertyList *>::const_iterator j(list.begin()), end(list.end()); j != end; ++j, iter += fieldType.Size()) {
-                                               fieldType.Construct(iter);
-                                               ReadObject(fieldType.TypeId(), -1, iter, **j);
+                                       for (vector<PropertyList *>::const_iterator j(list.begin()), end(list.end());
+                                                       j != end; ++j, iter += memberSize) {
+                                               char *member;
+                                               if (fd.IsReferenced()) {
+                                                       member = alloc.Alloc(fieldType.Size());
+                                                       *reinterpret_cast<char **>(iter) = member;
+                                               } else {
+                                                       member = iter;
+                                               }
+                                               fieldType.Construct(member);
+                                               ReadObject(fieldType.TypeId(), -1, member, **j);
                                        }
-                               } else {
+                               } else if (i->second->GetLiteral().GetType() == Literal::ARRAY_VALUES) {
                                        const vector<Value *> &list(i->second->GetLiteral().GetValues());
-                                       for (vector<Value *>::const_iterator j(list.begin()), end(list.end()); j != end; ++j, iter += fieldType.Size()) {
-                                               fieldType.Construct(iter);
-                                               ReadLiteral(fieldType.TypeId(), -1, iter, (*j)->GetLiteral());
+                                       for (vector<Value *>::const_iterator j(list.begin()), end(list.end());
+                                                       j != end; ++j, iter += memberSize) {
+                                               char *member;
+                                               if (fd.IsReferenced()) {
+                                                       member = alloc.Alloc(fieldType.Size());
+                                                       *reinterpret_cast<char **>(iter) = member;
+                                               } else {
+                                                       member = iter;
+                                               }
+                                               fieldType.Construct(member);
+                                               ReadLiteral(fieldType.TypeId(), -1, member, (*j)->GetLiteral());
                                        }
-                               }
-                               if (fd.IsReferenced()) {
-                                       std::memcpy(dest, &aggregate, sizeof(char *));
-                                       dest += sizeof(char *);
-                                       std::memcpy(dest, &arraySize, sizeof(int));
                                } else {
-                                       throw Error("aggregate type fields must be referenced");
+                                       if (!fd.IsReferenced()) {
+                                               // TODO: implement inline identifier arrays
+                                               throw std::runtime_error("inline identifier arrays not implemented (yet)");
+                                       }
+                                       const vector<string> &list(i->second->GetLiteral().GetIdentifiers());
+                                       for (vector<string>::const_iterator j(list.begin()), end(list.end());
+                                                       j != end; ++j, iter += memberSize) {
+                                               if (source.IsDefined(*j)) {
+                                                       *reinterpret_cast<void **>(iter)
+                                                                       = GetObject(fd.TypeId(), *j);
+                                               } else {
+                                                       Postpone(iter, *j, fd.TypeId(), false);
+                                               }
+                                       }
                                }
+                               std::memcpy(dest, &aggregate, sizeof(char *));
+                               dest += sizeof(char *);
+                               std::memcpy(dest, &arraySize, sizeof(int));
                        } else if (i->second->IsLiteral() && !fd.IsReferenced()) {
                                // inline literals
                                if (i->second->GetLiteral().IsObject()) {
@@ -335,7 +355,7 @@ void Interpreter::ReadObject(int typeId, int id, char *object, const PropertyLis
                                }
                        }
                } else {
-                       Postpone(typeId, id, fd.Offset(), i->second->GetIdentifier(), fd.TypeId(), !fd.IsReferenced());
+                       Postpone(object, i->second->GetIdentifier(), fd.TypeId(), !fd.IsReferenced(), fd.IsAggregate());
                }
        }
        td.Load(object);
@@ -355,7 +375,7 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                } else if ((*i)->GetType() != ScriptToken::COMMAND) {
                        throw Error("unexpected script token");
                }
-               ++size;
+               size += sizeof(Script::Code);
                const string &cmd((*i)->CommandName());
                if (cmd == "move") {
                        ++i;
@@ -363,59 +383,66 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                                throw Error("unexpected script end after move");
                        }
                        const string &reg((*i)->RegisterName());
-                       switch (reg[0]) {
-                               case 'a':
-                                       size += sizeof(void *);
-                                       break;
-                               case 'i':
-                                       size += sizeof(int);
-                                       break;
-                               case 'v':
-                                       size += sizeof(Vector<int>);
-                                       break;
-                               default:
-                                       throw Error("unknown register " + reg);
+                       if (reg.size() != 2) {
+                               throw Error("invalid register name " + reg);
                        }
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after move");
                        }
+                       if ((*i)->GetType() != ScriptToken::REGISTER) {
+                               switch (reg[0]) {
+                                       case 'a':
+                                               size += sizeof(void *);
+                                               break;
+                                       case 'i':
+                                               size += sizeof(int);
+                                               break;
+                                       case 'v':
+                                               size += sizeof(Vector<int>);
+                                               break;
+                                       default:
+                                               throw Error("unknown register " + reg);
+                               }
+                       }
                } else if (cmd == "add") {
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after add");
                        }
                        const string &reg((*i)->RegisterName());
-                       switch (reg[0]) {
-                               case 'i':
-                                       size += sizeof(int);
-                                       break;
-                               case 'v':
-                                       size += sizeof(Vector<int>);
-                                       break;
-                               default:
-                                       throw Error("expected register after add " + reg);
+                       if (reg.size() != 2) {
+                               throw Error("invalid register name " + reg);
                        }
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after add");
                        }
+                       if ((*i)->GetType() != ScriptToken::REGISTER) {
+                               switch (reg[0]) {
+                                       case 'i':
+                                               size += sizeof(int);
+                                               break;
+                                       case 'v':
+                                               size += sizeof(Vector<int>);
+                                               break;
+                                       default:
+                                               throw Error("expected register after add " + reg);
+                               }
+                       }
                } else if (cmd == "mod") {
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after mod");
                        }
-                       size += sizeof(int);
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after mod");
                        }
-               } else if (cmd == "rand") {
-                       ++i;
-                       if (i == end) {
-                               throw Error("unexpected script end after rand");
+                       if ((*i)->GetType() != ScriptToken::REGISTER) {
+                               size += sizeof(int);
                        }
-                       size += sizeof(int);
+               } else if (cmd == "rand") {
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after rand");
@@ -425,11 +452,16 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        if (i == end) {
                                throw Error("unexpected script end after cmp");
                        }
-                       size += sizeof(int);
+                       if ((*i)->GetType() != ScriptToken::REGISTER) {
+                               size += sizeof(int);
+                       }
                        ++i;
                        if (i == end) {
                                throw Error("unexpected script end after cmp");
                        }
+                       if ((*i)->GetType() != ScriptToken::REGISTER) {
+                               size += sizeof(int);
+                       }
                } else if (cmd == "jmp") {
                        size += sizeof(int);
                        ++i;
@@ -479,7 +511,7 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                }
        }
 
-       unsigned char *text(reinterpret_cast<unsigned char *>(alloc.Alloc(size)));
+       char *text(alloc.Alloc(size));
        int cursor(0);
        for (vector<ScriptToken *>::const_iterator i(s.begin()), end(s.end()); i != end; ++i) {
                if ((*i)->GetType() == ScriptToken::LABEL) {
@@ -490,123 +522,187 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                }
                const string &cmd((*i)->CommandName());
                if (cmd == "move") {
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_MOVE, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 2;
                        ++i;
                        const string &reg((*i)->RegisterName());
+                       switch (reg[0]) {
+                               case 'a':
+                                       code.type = Script::TYPE_ADDRESS;
+                                       break;
+                               case 'i':
+                                       code.type = Script::TYPE_INTEGER;
+                                       break;
+                               case 'v':
+                                       code.type = Script::TYPE_VECTOR;
+                                       break;
+                               default:
+                                       throw Error("invalid register " + reg);
+                       }
+                       int regnum(reg[1] - '0');
+                       if (regnum < 0 || regnum > 6) {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.reg1 = regnum;
                        ++i;
-                       if (reg == "a0") {
-                               text[cursor] = Script::CODE_MOVE_A0;
-                               ++cursor;
-                               ReadScriptAddress(**i, text + cursor);
-                               cursor += sizeof(void *);
-                       } else if (reg == "a1") {
-                               text[cursor] = Script::CODE_MOVE_A1;
-                               ++cursor;
-                               ReadScriptAddress(**i, text + cursor);
-                               cursor += sizeof(void *);
-                       } else if (reg == "i0") {
-                               text[cursor] = Script::CODE_MOVE_I0;
-                               ++cursor;
-                               ReadScriptInteger(**i, text + cursor);
-                               cursor += sizeof(int);
-                       } else if (reg == "i1") {
-                               text[cursor] = Script::CODE_MOVE_I1;
-                               ++cursor;
-                               ReadScriptInteger(**i, text + cursor);
-                               cursor += sizeof(int);
-                       } else if (reg == "v0") {
-                               text[cursor] = Script::CODE_MOVE_V0;
-                               ++cursor;
-                               ReadScriptVector(**i, text + cursor);
-                               cursor += sizeof(Vector<int>);
-                       } else if (reg == "v1") {
-                               text[cursor] = Script::CODE_MOVE_V1;
-                               ++cursor;
-                               ReadScriptVector(**i, text + cursor);
-                               cursor += sizeof(Vector<int>);
+
+                       if ((*i)->GetType() == ScriptToken::REGISTER) {
+                               string reg2((*i)->RegisterName());
+                               if (reg[0] != reg2[0]) {
+                                       throw Error("mixed-type commands not allowed");
+                               }
+                               int reg2num(reg[1] - '0');
+                               if (reg2num < 0 || reg2num > 6) {
+                                       throw Error("invalid register " + reg2);
+                               }
+                               code.reg2 = reg2num;
                        } else {
-                               throw Error("unknown register " + reg);
+                               code.reg2 = 7;
+                               switch (code.type) {
+                                       case Script::TYPE_ADDRESS:
+                                               ReadScriptAddress(**i, text + cursor);
+                                               cursor += sizeof(void *);
+                                               break;
+                                       case Script::TYPE_INTEGER:
+                                               ReadScriptInteger(**i, text + cursor);
+                                               cursor += sizeof(int);
+                                               break;
+                                       case Script::TYPE_VECTOR:
+                                               ReadScriptVector(**i, text + cursor);
+                                               cursor += sizeof(Vector<int>);
+                                               break;
+                               }
                        }
                } else if (cmd == "add") {
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_ADD, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 2;
                        ++i;
                        const string &reg((*i)->RegisterName());
+                       switch (reg[0]) {
+                               case 'i':
+                                       code.type = Script::TYPE_INTEGER;
+                                       break;
+                               case 'v':
+                                       code.type = Script::TYPE_VECTOR;
+                                       break;
+                               default:
+                                       throw Error("invalid register " + reg);
+                       }
+                       int regnum(reg[1] - '0');
+                       if (regnum < 0 || regnum > 6) {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.reg1 = regnum;
                        ++i;
-                       if (reg == "i0") {
-                               text[cursor] = Script::CODE_ADD_I0;
-                               ++cursor;
-                               ReadScriptInteger(**i, text + cursor);
-                               cursor += sizeof(int);
-                       } else if (reg == "i1") {
-                               text[cursor] = Script::CODE_ADD_I1;
-                               ++cursor;
-                               ReadScriptInteger(**i, text + cursor);
-                               cursor += sizeof(int);
-                       } else if (reg == "v0") {
-                               text[cursor] = Script::CODE_ADD_V0;
-                               ++cursor;
-                               ReadScriptVector(**i, text + cursor);
-                               cursor += sizeof(Vector<int>);
-                       } else if (reg == "v1") {
-                               text[cursor] = Script::CODE_ADD_V1;
-                               ++cursor;
-                               ReadScriptVector(**i, text + cursor);
-                               cursor += sizeof(Vector<int>);
+
+                       if ((*i)->GetType() == ScriptToken::REGISTER) {
+                               string reg2((*i)->RegisterName());
+                               if (reg[0] != reg2[0]) {
+                                       throw Error("mixed-type commands not allowed");
+                               }
+                               int reg2num(reg[1] - '0');
+                               if (reg2num < 0 || reg2num > 6) {
+                                       throw Error("invalid register name " + reg2);
+                               }
+                               code.reg2 = reg2num;
                        } else {
-                               throw Error("unexpected register " + reg);
+                               code.reg2 = 7;
+                               switch (code.type) {
+                                       case Script::TYPE_INTEGER:
+                                               ReadScriptInteger(**i, text + cursor);
+                                               cursor += sizeof(int);
+                                               break;
+                                       case Script::TYPE_VECTOR:
+                                               ReadScriptVector(**i, text + cursor);
+                                               cursor += sizeof(Vector<int>);
+                                               break;
+                               }
                        }
                } else if (cmd == "mod") {
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_MOD, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 2;
                        ++i;
                        const string &reg((*i)->RegisterName());
+                       if (reg[0] != 'i') {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.type = Script::TYPE_INTEGER;
+                       int regnum(reg[1] - '0');
+                       if (regnum < 0 || regnum > 6) {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.reg1 = regnum;
                        ++i;
-                       if (reg == "i0") {
-                               text[cursor] = Script::CODE_MOD_I0;
-                               ++cursor;
-                               ReadScriptInteger(**i, text + cursor);
-                               cursor += sizeof(int);
-                       } else if (reg == "i1") {
-                               text[cursor] = Script::CODE_MOD_I1;
-                               ++cursor;
+
+                       if ((*i)->GetType() == ScriptToken::REGISTER) {
+                               string reg2((*i)->RegisterName());
+                               if (reg[0] != reg2[0]) {
+                                       throw Error("mixed-type commands not allowed");
+                               }
+                               int reg2num(reg[1] - '0');
+                               if (reg2num < 0 || reg2num > 6) {
+                                       throw Error("invalid register name " + reg2);
+                               }
+                               code.reg2 = reg2num;
+                       } else {
+                               code.reg2 = 7;
                                ReadScriptInteger(**i, text + cursor);
                                cursor += sizeof(int);
-                       } else {
-                               throw Error("unexpected register " + reg);
                        }
                } else if (cmd == "rand") {
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_RAND, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        const string &reg((*i)->RegisterName());
-                       if (reg == "i0") {
-                               text[cursor] = Script::CODE_RAND_I0;
-                               ++cursor;
-                       } else if (reg == "i1") {
-                               text[cursor] = Script::CODE_RAND_I1;
-                               ++cursor;
-                       } else {
-                               throw Error("unexpected register " + reg);
+                       if (reg[0] != 'i') {
+                               throw Error("invalid register " + reg);
                        }
+                       code.type = Script::TYPE_INTEGER;
+                       int regnum(reg[1] - '0');
+                       if (regnum < 0 || regnum > 6) {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.reg1 = regnum;
                } else if (cmd == "cmp") {
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_CMP, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 2;
                        ++i;
                        const string &reg((*i)->RegisterName());
+                       if (reg[0] != 'i') {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.type = Script::TYPE_INTEGER;
+                       int regnum(reg[1] - '0');
+                       if (regnum < 0 || regnum > 6) {
+                               throw Error("invalid register " + reg);
+                       }
+                       code.reg1 = regnum;
                        ++i;
-                       if (reg == "i0") {
-                               if ((*i)->GetType() == ScriptToken::REGISTER && (*i)->RegisterName() == "i1") {
-                                       text[cursor] = Script::CODE_CMP_I0_I1;
-                                       ++cursor;
-                               } else {
-                                       text[cursor] = Script::CODE_CMP_I0;
-                                       ++cursor;
-                                       ReadScriptInteger(**i, text + cursor);
-                                       cursor += sizeof(int);
+
+                       if ((*i)->GetType() == ScriptToken::REGISTER) {
+                               string reg2((*i)->RegisterName());
+                               if (reg[0] != reg2[0]) {
+                                       throw Error("mixed-type commands not allowed");
+                               }
+                               int reg2num(reg[1] - '0');
+                               if (reg2num < 0 || reg2num > 6) {
+                                       throw Error("invalid register name " + reg2);
                                }
-                       } else if (reg == "i1") {
-                               text[cursor] = Script::CODE_CMP_I1;
-                               ++cursor;
+                               code.reg2 = reg2num;
+                       } else {
+                               code.reg2 = 7;
                                ReadScriptInteger(**i, text + cursor);
                                cursor += sizeof(int);
-                       } else {
-                               throw Error("cannot use " + reg + " as lhs for comparison");
                        }
                } else if (cmd == "jmp") {
-                       text[cursor] = Script::CODE_JUMP;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JMP, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -614,8 +710,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jeq") {
-                       text[cursor] = Script::CODE_JUMP_EQUAL;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JEQ, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -623,8 +720,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jne") {
-                       text[cursor] = Script::CODE_JUMP_NOT_EQUAL;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JNE, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -632,8 +730,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jl") {
-                       text[cursor] = Script::CODE_JUMP_LESS;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JL, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -641,8 +740,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jle") {
-                       text[cursor] = Script::CODE_JUMP_LESS_EQUAL;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JLE, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -650,8 +750,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jg") {
-                       text[cursor] = Script::CODE_JUMP_GREATER;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JG, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -659,8 +760,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "jge") {
-                       text[cursor] = Script::CODE_JUMP_GREATER_EQUAL;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_JGE, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 1;
                        ++i;
                        if (!labels.count((*i)->Identifier())) {
                                throw Error("use of undefined label " + (*i)->Identifier());
@@ -668,8 +770,9 @@ void Interpreter::ReadScript(const std::vector<ScriptToken *> &s, Script *script
                        *reinterpret_cast<int *>(text + cursor) = labels[(*i)->Identifier()];
                        cursor += sizeof(int);
                } else if (cmd == "sysc") {
-                       text[cursor] = Script::CODE_SYSCALL;
-                       ++cursor;
+                       Script::Code &code(CreateScriptCode(Script::COMMAND_SYSC, text + cursor));
+                       cursor += sizeof(Script::Code);
+                       code.numParams = 0;
                } else {
                        throw Error("unknown command " + cmd);
                }
@@ -687,7 +790,17 @@ char *Interpreter::ReadScript(const vector<ScriptToken *> &s) {
        return mem;
 }
 
-void Interpreter::ReadScriptAddress(const ScriptToken &t, unsigned char *dest) {
+Script::Code &Interpreter::CreateScriptCode(Script::Command c, char *dest) {
+       Script::Code &code(*reinterpret_cast<Script::Code *>(dest));
+       code.command = c;
+       code.numParams = 0;
+       code.type = Script::TYPE_NONE;
+       code.reg1 = 7;
+       code.reg2 = 7;
+       return code;
+}
+
+void Interpreter::ReadScriptAddress(const ScriptToken &t, char *dest) {
        if (t.GetType() != ScriptToken::IDENTIFIER) {
                throw Error("expected identifier for address");
        }
@@ -700,7 +813,7 @@ void Interpreter::ReadScriptAddress(const ScriptToken &t, unsigned char *dest) {
        }
 }
 
-void Interpreter::ReadScriptInteger(const ScriptToken &t, unsigned char *dest) {
+void Interpreter::ReadScriptInteger(const ScriptToken &t, char *dest) {
        if (t.GetType() == ScriptToken::IDENTIFIER) {
                if (source.IsDefined(t.Identifier())) {
                        void *num(GetObject(TypeDescription::GetTypeId("Number"), t.Identifier()));
@@ -715,7 +828,7 @@ void Interpreter::ReadScriptInteger(const ScriptToken &t, unsigned char *dest) {
        }
 }
 
-void Interpreter::ReadScriptVector(const ScriptToken &t, unsigned char *dest) {
+void Interpreter::ReadScriptVector(const ScriptToken &t, char *dest) {
        if (t.GetType() == ScriptToken::IDENTIFIER) {
                if (source.IsDefined(t.Identifier())) {
                        void *vec(GetObject(TypeDescription::GetTypeId("Vector"), t.Identifier()));
@@ -747,22 +860,28 @@ bool Interpreter::CanLink(const Value &v) const {
        return v.IsLiteral() || source.IsDefined(v.GetIdentifier());
 }
 
-void Interpreter::Postpone(int type, int id, std::ptrdiff_t offset, const std::string &identifier, int linkedType, bool inlined) {
+void Interpreter::Postpone(
+               char *dest,
+               const std::string &identifier,
+               int type,
+               bool inlined,
+               bool aggregate) {
        char *str(alloc.Alloc(identifier.size() + 1));
        std::memcpy(str, identifier.c_str(), identifier.size());
        str[identifier.size()] = '\0';
-       postponedDefinitions.push_back(PostponedDefinition(type, id, offset, str, linkedType, inlined));
+       postponedDefinitions.push_back(
+                       PostponedDefinition(dest, str, type, inlined, aggregate));
 }
 
 
 void Interpreter::CreateTypeDescriptions() {
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Boolean"));
+               TypeDescription &td(TypeDescription::Create(BOOLEAN_ID, "Boolean"));
                td.SetDescription("Logical value which can be either true or false.");
                td.SetSize(sizeof(bool));
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Color"));
+               TypeDescription &td(TypeDescription::Create(COLOR_ID, "Color"));
                td.SetDescription(
                                "A color in RGB format with an optional alpha channel.\n"
                                "Components range from 0 to 255.\n"
@@ -770,34 +889,33 @@ void Interpreter::CreateTypeDescriptions() {
                td.SetSize(sizeof(Color));
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Image"));
+               TypeDescription &td(TypeDescription::Create(IMAGE_ID, "Image"));
                td.SetDescription("Path to a PNG file with image data.");
                td.SetSize(sizeof(SDL_Surface));
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Number"));
+               TypeDescription &td(TypeDescription::Create(NUMBER_ID, "Number"));
                td.SetDescription("A signed integer.");
                td.SetSize(sizeof(int));
        }
-       {
-               int stringId(TypeDescription::GetTypeId("String"));
-               TypeDescription &td(TypeDescription::CreateOrGet("Path"));
+       {;
+               TypeDescription &td(TypeDescription::Create(PATH_ID, "Path"));
                td.SetDescription("A path in the filesystem which is interpreted relative to the source file's location.");
                td.SetSize(1);
-               td.AddSupertype(stringId, 0);
+               td.AddSupertype(STRING_ID, 0);
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Script"));
+               TypeDescription &td(TypeDescription::Create(SCRIPT_ID, "Script"));
                td.SetDescription("Collection of commands that define a behaviour.");
                td.SetSize(sizeof(Script));
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("String"));
+               TypeDescription &td(TypeDescription::Create(STRING_ID, "String"));
                td.SetDescription("Some characters.");
                td.SetSize(1);
        }
        {
-               TypeDescription &td(TypeDescription::CreateOrGet("Vector"));
+               TypeDescription &td(TypeDescription::Create(VECTOR_ID, "Vector"));
                td.SetDescription("A pair of numbers usually describing a 2D translation or offset.");
                td.SetSize(sizeof(Vector<int>));
        }