jsfuninlines.h
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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*
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*
* The Original Code is SpiderMonkey.
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* The Initial Developer of the Original Code is
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#ifndef jsfuninlines_h___
#define jsfuninlines_h___
#include "jsfun.h"
#include "jsscript.h"
#include "vm/GlobalObject.h"
#include "vm/ScopeObject-inl.h"
inline bool
JSFunction::inStrictMode() const
{
return script()->strictModeCode;
}
inline JSObject *
JSFunction::environment() const
{
JS_ASSERT(isInterpreted());
return u.i.env_;
}
inline void
JSFunction::setEnvironment(JSObject *obj)
{
JS_ASSERT(isInterpreted());
*(js::HeapPtrObject *)&u.i.env_ = obj;
}
inline void
JSFunction::initEnvironment(JSObject *obj)
{
JS_ASSERT(isInterpreted());
((js::HeapPtrObject *)&u.i.env_)->init(obj);
}
inline void
JSFunction::initializeExtended()
{
JS_ASSERT(isExtended());
JS_ASSERT(js::ArrayLength(toExtended()->extendedSlots) == 2);
toExtended()->extendedSlots[0].init(js::UndefinedValue());
toExtended()->extendedSlots[1].init(js::UndefinedValue());
}
inline void
JSFunction::setExtendedSlot(size_t which, const js::Value &val)
{
JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
toExtended()->extendedSlots[which] = val;
}
inline const js::Value &
JSFunction::getExtendedSlot(size_t which) const
{
JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
return toExtended()->extendedSlots[which];
}
namespace js {
static JS_ALWAYS_INLINE bool
IsFunctionObject(const js::Value &v)
{
return v.isObject() && v.toObject().isFunction();
}
static JS_ALWAYS_INLINE bool
IsFunctionObject(const js::Value &v, JSFunction **fun)
{
if (v.isObject() && v.toObject().isFunction()) {
*fun = v.toObject().toFunction();
return true;
}
return false;
}
static JS_ALWAYS_INLINE bool
IsNativeFunction(const js::Value &v)
{
JSFunction *fun;
return IsFunctionObject(v, &fun) && fun->isNative();
}
static JS_ALWAYS_INLINE bool
IsNativeFunction(const js::Value &v, JSFunction **fun)
{
return IsFunctionObject(v, fun) && (*fun)->isNative();
}
static JS_ALWAYS_INLINE bool
IsNativeFunction(const js::Value &v, JSNative native)
{
JSFunction *fun;
return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
}
/*
* When we have an object of a builtin class, we don't quite know what its
* valueOf/toString methods are, since these methods may have been overwritten
* or shadowed. However, we can still do better than the general case by
* hard-coding the necessary properties for us to find the native we expect.
*
* TODO: a per-thread shape-based cache would be faster and simpler.
*/
static JS_ALWAYS_INLINE bool
ClassMethodIsNative(JSContext *cx, HandleObject obj, Class *clasp, HandleId methodid, JSNative native)
{
JS_ASSERT(obj->getClass() == clasp);
Value v;
if (!HasDataProperty(cx, obj, methodid, &v)) {
RootedVarObject proto(cx, obj->getProto());
if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, proto, methodid, &v))
return false;
}
return js::IsNativeFunction(v, native);
}
extern JS_ALWAYS_INLINE bool
SameTraceType(const Value &lhs, const Value &rhs)
{
return SameType(lhs, rhs) &&
(lhs.isPrimitive() ||
lhs.toObject().isFunction() == rhs.toObject().isFunction());
}
/* Valueified JS_IsConstructing. */
static JS_ALWAYS_INLINE bool
IsConstructing(const Value *vp)
{
#ifdef DEBUG
JSObject *callee = &JS_CALLEE(cx, vp).toObject();
if (callee->isFunction()) {
JSFunction *fun = callee->toFunction();
JS_ASSERT((fun->flags & JSFUN_CONSTRUCTOR) != 0);
} else {
JS_ASSERT(callee->getClass()->construct != NULL);
}
#endif
return vp[1].isMagic();
}
inline bool
IsConstructing(CallReceiver call)
{
return IsConstructing(call.base());
}
inline const char *
GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
{
if (fun->atom)
return bytes->encode(cx, fun->atom);
return js_anonymous_str;
}
extern JSFunctionSpec function_methods[];
extern JSBool
Function(JSContext *cx, unsigned argc, Value *vp);
extern bool
IsBuiltinFunctionConstructor(JSFunction *fun);
static inline JSObject *
SkipScopeParent(JSObject *parent)
{
if (!parent)
return NULL;
while (parent->isScope())
parent = &parent->asScope().enclosingScope();
return parent;
}
inline JSFunction *
CloneFunctionObject(JSContext *cx, HandleFunction fun, HandleObject parent,
gc::AllocKind kind = JSFunction::FinalizeKind)
{
JS_ASSERT(parent);
RootedVarObject proto(cx, parent->global().getOrCreateFunctionPrototype(cx));
if (!proto)
return NULL;
return js_CloneFunctionObject(cx, fun, parent, proto, kind);
}
inline JSFunction *
CloneFunctionObjectIfNotSingleton(JSContext *cx, HandleFunction fun, HandleObject parent)
{
/*
* For attempts to clone functions at a function definition opcode,
* don't perform the clone if the function has singleton type. This
* was called pessimistically, and we need to preserve the type's
* property that if it is singleton there is only a single object
* with its type in existence.
*/
if (fun->hasSingletonType()) {
if (!fun->setParent(cx, SkipScopeParent(parent)))
return NULL;
fun->setEnvironment(parent);
return fun;
}
return CloneFunctionObject(cx, fun, parent);
}
inline JSFunction *
CloneFunctionObject(JSContext *cx, HandleFunction fun)
{
/*
* Variant which makes an exact clone of fun, preserving parent and proto.
* Calling the above version CloneFunctionObject(cx, fun, fun->getParent())
* is not equivalent: API clients, including XPConnect, can reparent
* objects so that fun->global() != fun->getProto()->global().
* See ReparentWrapperIfFound.
*/
JS_ASSERT(fun->getParent() && fun->getProto());
if (fun->hasSingletonType())
return fun;
return js_CloneFunctionObject(cx, fun,
RootedVarObject(cx, fun->environment()),
RootedVarObject(cx, fun->getProto()),
JSFunction::ExtendedFinalizeKind);
}
} /* namespace js */
inline void
JSFunction::setScript(JSScript *script_)
{
JS_ASSERT(isInterpreted());
mutableScript() = script_;
}
inline void
JSFunction::initScript(JSScript *script_)
{
JS_ASSERT(isInterpreted());
mutableScript().init(script_);
}
#endif /* jsfuninlines_h___ */
