зеркало из https://github.com/mozilla/gecko-dev.git
192 строки
6.1 KiB
C++
192 строки
6.1 KiB
C++
// -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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//
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// The contents of this file are subject to the Netscape Public
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// License Version 1.1 (the "License"); you may not use this file
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// except in compliance with the License. You may obtain a copy of
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// the License at http://www.mozilla.org/NPL/
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//
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// Software distributed under the License is distributed on an "AS
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// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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// implied. See the License for the specific language governing
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// rights and limitations under the License.
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//
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// The Original Code is the JavaScript 2 Prototype.
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//
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// The Initial Developer of the Original Code is Netscape
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// Communications Corporation. Portions created by Netscape are
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// Copyright (C) 2000 Netscape Communications Corporation. All
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// Rights Reserved.
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#ifndef interpreter_h
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#define interpreter_h
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#include "utilities.h"
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#include "jstypes.h"
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#include "vmtypes.h"
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#include "icodegenerator.h"
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#include "gc_allocator.h"
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namespace JavaScript {
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namespace Interpreter {
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using namespace ICG;
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using namespace JSTypes;
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struct Activation;
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struct Linkage;
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class Context : public gc_base {
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void initContext();
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public:
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explicit Context(World& world, JSScope* aGlobal)
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: mWorld(world), mGlobal(aGlobal), mLinkage(0), mActivation(0), mCurrentClosure(0) { initContext(); }
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World& getWorld() { return mWorld; }
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JSScope* getGlobalObject() { return mGlobal; }
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InstructionIterator getPC() { return mPC; }
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JSValues& getRegisters();
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ICodeModule* getICode();
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enum Event {
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EV_NONE = 0x0000,
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EV_STEP = 0x0001,
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EV_THROW = 0x0002,
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EV_DEBUG = 0x0004,
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EV_ALL = 0xffff
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};
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class Listener {
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public:
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virtual void listen(Context *context, Event event) = 0;
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};
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void addListener(Listener* listener);
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void removeListener(Listener* listener);
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class Frame {
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public:
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virtual Frame* getNext() = 0;
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virtual void getState(InstructionIterator& pc, JSValues*& registers,
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ICodeModule*& iCode) = 0;
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};
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Frame* getFrames();
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JSValue interpret(ICodeModule* iCode, const JSValues& args);
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void doCall(JSFunction *target, Instruction *pc);
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ICodeModule* compileFunction(const String &source);
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ICodeModule* genCode(StmtNode *p, const String &fileName);
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JSValue readEvalFile(FILE* in, const String& fileName);
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ICodeModule* loadClass(const char *fileName);
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const JSValue findBinaryOverride(JSValue &operand1, JSValue &operand2, ExprNode::Kind op);
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JSType *findType(const StringAtom& typeName);
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JSType *extractType(ExprNode *t);
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JSType *getParameterType(FunctionDefinition &function, int index);
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private:
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void broadcast(Event event);
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void initOperatorsPackage();
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bool hasNamedArguments(ArgumentList &args);
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private:
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World& mWorld;
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JSScope* mGlobal;
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Linkage* mLinkage;
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typedef std::vector<Listener*, gc_allocator<Listener*> > ListenerList;
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typedef ListenerList::iterator ListenerIterator;
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ListenerList mListeners;
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Activation* mActivation;
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ICodeModule* mICode;
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JSClosure* mCurrentClosure;
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InstructionIterator mPC;
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}; /* class Context */
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/**
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*
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*/
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struct Handler: public gc_base {
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Handler(Label *catchLabel, Label *finallyLabel)
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: catchTarget(catchLabel), finallyTarget(finallyLabel) {}
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Label *catchTarget;
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Label *finallyTarget;
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};
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typedef std::vector<Handler *> CatchStack;
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/**
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* Represents the current function's invocation state.
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*/
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struct Activation : public JSObject {
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JSValues mRegisters;
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CatchStack catchStack;
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Activation(uint32 highRegister, const JSValues& args)
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: mRegisters(highRegister + 1)
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{
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// copy arg list to initial registers.
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JSValues::iterator dest = mRegisters.begin();
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for (JSValues::const_iterator src = args.begin(),
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end = args.end(); src != end; ++src, ++dest) {
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*dest = *src;
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}
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}
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Activation(uint32 highRegister, Activation* caller, const JSValue thisArg,
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const ArgumentList* list)
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: mRegisters(highRegister + 1)
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{
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// copy caller's parameter list to initial registers.
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JSValues::iterator dest = mRegisters.begin();
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*dest++ = thisArg;
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if (list) {
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const JSValues& params = caller->mRegisters;
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for (ArgumentList::const_iterator src = list->begin(),
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end = list->end(); src != end; ++src, ++dest) {
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Register r = (*src).first.first;
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if (r != NotARegister)
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*dest = params[r];
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else
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*dest = JSValue(JSValue::uninitialized_tag);
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}
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}
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}
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// calling a binary operator, no 'this'
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Activation(uint32 highRegister, const JSValue thisArg, const JSValue arg1, const JSValue arg2)
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: mRegisters(highRegister + 1)
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{
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mRegisters[0] = thisArg;
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mRegisters[1] = arg1;
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mRegisters[2] = arg2;
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}
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// calling a getter function, no arguments
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Activation(uint32 highRegister, const JSValue thisArg)
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: mRegisters(highRegister + 1)
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{
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mRegisters[0] = thisArg;
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}
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// calling a setter function, 1 argument
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Activation(uint32 highRegister, const JSValue thisArg, const JSValue arg)
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: mRegisters(highRegister + 1)
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{
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mRegisters[0] = thisArg;
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mRegisters[1] = arg;
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}
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}; /* struct Activation */
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} /* namespace Interpreter */
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} /* namespace JavaScript */
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#endif /* interpreter_h */
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