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diff --git a/kjs/lookup.h b/kjs/lookup.h
index 6fabc8ff32..00622d0143 100644
--- a/kjs/lookup.h
+++ b/kjs/lookup.h
@@ -1,420 +1,421 @@
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _KJSLOOKUP_H_
#define _KJSLOOKUP_H_
+#include "JSVariableObject.h"
#include "interpreter.h"
#include "identifier.h"
#include "object.h"
#include <stdio.h>
namespace KJS {
class FunctionPrototype;
/**
* An entry in a hash table.
*/
struct KJS_EXPORT HashEntry {
/**
* s is the key (e.g. a property name)
*/
const char *s;
/**
* value is the result value (usually an enum value)
*/
int value;
/**
* attr is a set for flags (e.g. the property flags, see object.h)
*/
short int attr;
/**
* params is another number. For property hashtables, it is used to
* denote the number of argument of the function
*/
short int params;
/**
* next is the pointer to the next entry for the same hash value
*/
const HashEntry *next;
};
/**
* A hash table
* Usually the hashtable is generated by the create_hash_table script, from a .table file.
*
* The implementation uses an array of entries, "size" is the total size of that array.
* The entries between 0 and hashSize-1 are the entry points
* for each hash value, and the entries between hashSize and size-1
* are the overflow entries for the hash values that need one.
* The "next" pointer of the entry links entry points to overflow entries,
* and links overflow entries between them.
*/
struct HashTable {
/**
* type is a version number. Currently always 2
*/
int type;
/**
* size is the total number of entries in the hashtable, including the null entries,
* i.e. the size of the "entries" array.
* Used to iterate over all entries in the table
*/
int size;
/**
* pointer to the array of entries
* Mind that some entries in the array are null (0,0,0,0).
*/
const HashEntry *entries;
/**
* the maximum value for the hash. Always smaller than size.
*/
int hashSize;
};
/**
* @short Fast keyword lookup.
*/
class KJS_EXPORT Lookup {
public:
/**
* Find an entry in the table, and return its value (i.e. the value field of HashEntry)
*/
static int find(const struct HashTable *table, const Identifier &s);
static int find(const struct HashTable *table,
const UChar *c, unsigned int len);
/**
* Find an entry in the table, and return the entry
* This variant gives access to the other attributes of the entry,
* especially the attr field.
*/
static const HashEntry* findEntry(const struct HashTable *table,
const Identifier &s);
};
class ExecState;
/**
* @internal
* Helper for getStaticFunctionSlot and getStaticPropertySlot
*/
template <class FuncImp>
inline JSValue *staticFunctionGetter(ExecState *exec, JSObject * /*originalObject*/, const Identifier& propertyName, const PropertySlot& slot)
{
// Look for cached value in dynamic map of properties (in JSObject)
JSObject *thisObj = slot.slotBase();
JSValue *cachedVal = thisObj->getDirect(propertyName);
if (cachedVal)
return cachedVal;
const HashEntry *entry = slot.staticEntry();
JSValue *val = new FuncImp(exec, entry->value, entry->params, propertyName);
thisObj->putDirect(propertyName, val, entry->attr);
return val;
}
/**
* @internal
* Helper for getStaticValueSlot and getStaticPropertySlot
*/
template <class ThisImp>
inline JSValue *staticValueGetter(ExecState *exec, JSObject*, const Identifier&, const PropertySlot& slot)
{
ThisImp* thisObj = static_cast<ThisImp*>(slot.slotBase());
const HashEntry* entry = slot.staticEntry();
return thisObj->getValueProperty(exec, entry->value);
}
/**
* Helper method for property lookups
*
* This method does it all (looking in the hashtable, checking for function
* overrides, creating the function or retrieving from cache, calling
* getValueProperty in case of a non-function property, forwarding to parent if
* unknown property).
*
* Template arguments:
* @param FuncImp the class which implements this object's functions
* @param ThisImp the class of "this". It must implement the getValueProperty(exec,token) method,
* for non-function properties.
* @param ParentImp the class of the parent, to propagate the lookup.
*
* Method arguments:
* @param exec execution state, as usual
* @param propertyName the property we're looking for
* @param table the static hashtable for this class
* @param thisObj "this"
*/
template <class FuncImp, class ThisImp, class ParentImp>
inline bool getStaticPropertySlot(ExecState *exec, const HashTable* table,
ThisImp* thisObj, const Identifier& propertyName, PropertySlot& slot)
{
const HashEntry* entry = Lookup::findEntry(table, propertyName);
if (!entry) // not found, forward to parent
return thisObj->ParentImp::getOwnPropertySlot(exec, propertyName, slot);
if (entry->attr & Function)
slot.setStaticEntry(thisObj, entry, staticFunctionGetter<FuncImp>);
else
slot.setStaticEntry(thisObj, entry, staticValueGetter<ThisImp>);
return true;
}
/**
* Simplified version of getStaticPropertySlot in case there are only functions.
* Using this instead of getStaticPropertySlot allows 'this' to avoid implementing
* a dummy getValueProperty.
*/
template <class FuncImp, class ParentImp>
inline bool getStaticFunctionSlot(ExecState *exec, const HashTable *table,
JSObject* thisObj, const Identifier& propertyName, PropertySlot& slot)
{
const HashEntry* entry = Lookup::findEntry(table, propertyName);
if (!entry) // not found, forward to parent
return static_cast<ParentImp *>(thisObj)->ParentImp::getOwnPropertySlot(exec, propertyName, slot);
assert(entry->attr & Function);
slot.setStaticEntry(thisObj, entry, staticFunctionGetter<FuncImp>);
return true;
}
/**
* Simplified version of getStaticPropertySlot in case there are no functions, only "values".
* Using this instead of getStaticPropertySlot removes the need for a FuncImp class.
*/
template <class ThisImp, class ParentImp>
inline bool getStaticValueSlot(ExecState *exec, const HashTable* table,
ThisImp* thisObj, const Identifier &propertyName, PropertySlot& slot)
{
const HashEntry* entry = Lookup::findEntry(table, propertyName);
if (!entry) // not found, forward to parent
return thisObj->ParentImp::getOwnPropertySlot(exec, propertyName, slot);
assert(!(entry->attr & Function));
slot.setStaticEntry(thisObj, entry, staticValueGetter<ThisImp>);
return true;
}
/**
* This one is for "put".
* It looks up a hash entry for the property to be set. If an entry
* is found it sets the value and returns true, else it returns false.
*/
template <class ThisImp>
inline bool lookupPut(ExecState* exec, const Identifier &propertyName,
JSValue* value, int attr,
const HashTable* table, ThisImp* thisObj)
{
const HashEntry* entry = Lookup::findEntry(table, propertyName);
if (!entry)
return false;
if (entry->attr & Function) // function: put as override property
thisObj->JSObject::put(exec, propertyName, value, attr);
else if (entry->attr & ReadOnly) // readonly! Can't put!
#ifdef KJS_VERBOSE
fprintf(stderr,"WARNING: Attempt to change value of readonly property '%s'\n",propertyName.ascii());
#else
; // do nothing
#endif
else
thisObj->putValueProperty(exec, entry->value, value, attr);
return true;
}
/**
* This one is for "put".
* It calls lookupPut<ThisImp>() to set the value. If that call
* returns false (meaning no entry in the hash table was found),
* then it calls put() on the ParentImp class.
*/
template <class ThisImp, class ParentImp>
inline void lookupPut(ExecState* exec, const Identifier &propertyName,
JSValue* value, int attr,
const HashTable* table, ThisImp* thisObj)
{
if (!lookupPut<ThisImp>(exec, propertyName, value, attr, table, thisObj))
thisObj->ParentImp::put(exec, propertyName, value, attr); // not found: forward to parent
}
} // namespace
#if COMPILER(GCC)
// Work around a bug in GCC 4.1. The original code was
// #if !COMPILER(GCC)
// #define KJS_GCC_ROOT_NS_HACK ::
// #else
// #define KJS_GCC_ROOT_NS_HACK
// #endif
// We separate use and declaration here; the define KJS_OBJECTCAHE_IN_KJS
// distinguishes if the cache is in KJS (value 1) or not (value 0).
#define KJS_OBJECTCACHE_IN_KJS (0)
#define KJS_CACHEGLOBALOBJECT_NS
#define KJS_CACHEGLOBALOBJECT_NS_USE ::
#else
#if COMPILER(SUNPRO)
// SunPro puts the whole thing in namespace KJS::, no linking problems.
#define KJS_OBJECTCACHE_IN_KJS (1)
#define KJS_CACHEGLOBALOBJECT_NS KJS::
#define KJS_CACHEGLOBALOBJECT_NS_USE KJS::
#else
// All other non-Studio, non-GCC compilers are forced to put the
// object cache outside the KJS namespace, and don't use the GCC
// hack to do so.
#define KJS_OBJECTCACHE_IN_KJS (0)
#define KJS_CACHEGLOBALOBJECT_NS ::
#define KJS_CACHEGLOBALOBJECT_NS_USE ::
#endif
#endif
#if KJS_OBJECTCACHE_IN_KJS
namespace KJS {
#endif
/*
* The template method below can't be in the KJS namespace because it's used in
* KJS_DEFINE_PROPERTY which can be used outside of the KJS namespace. It can
* be moved back when a gcc with a fix for
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8355
* is mainstream enough.
*
* This note applies only to GCC and other non-Studio12 compilers. Studio12
* does support having this template in namespace KJS. The macro
* KJS_OBJECTCACHE_IN_KJS expands to 1 when it is safe to put the template
* in the KJS namespace.
*/
/**
* This template method retrieves or create an object that is unique
* (for a given interpreter) The first time this is called (for a given
* property name), the Object will be constructed, and set as a property
* of the interpreter's global object. Later calls will simply retrieve
* that cached object. Note that the object constructor must take 1 argument, exec.
*/
template <class ClassCtor>
inline KJS::JSObject *cacheGlobalObject(KJS::ExecState *exec, const KJS::Identifier &propertyName)
{
KJS::JSObject *globalObject = static_cast<KJS::JSObject *>(exec->lexicalInterpreter()->globalObject());
KJS::JSValue *obj = globalObject->getDirect(propertyName);
if (obj) {
assert(obj->isObject());
return static_cast<KJS::JSObject *>(obj);
}
KJS::JSObject *newObject = new ClassCtor(exec);
globalObject->put(exec, propertyName, newObject, KJS::Internal | KJS::DontEnum);
return newObject;
}
#if KJS_OBJECTCACHE_IN_KJS
}
#endif
/**
* Helpers to define prototype objects (each of which simply implements
* the functions for a type of objects).
* Sorry for this not being very readable, but it actually saves much copy-n-paste.
* ParentProto is not our base class, it's the object we use as fallback.
* The reason for this is that there should only be ONE DOMNode.hasAttributes (e.g.),
* not one in each derived class. So we link the (unique) prototypes between them.
*
* Using those macros is very simple: define the hashtable (e.g. "DOMNodeProtoTable"), then
* KJS_DEFINE_PROTOTYPE(DOMNodeProto)
* KJS_IMPLEMENT_PROTOFUNC(DOMNodeProtoFunc)
* KJS_IMPLEMENT_PROTOTYPE("DOMNode", DOMNodeProto,DOMNodeProtoFunc)
* and use DOMNodeProto::self(exec) as prototype in the DOMNode constructor.
* If the prototype has a "parent prototype", e.g. DOMElementProto falls back on DOMNodeProto,
* then the first line will use KJS_DEFINE_PROTOTYPE_WITH_PROTOTYPE, with DOMNodeProto as the second argument.
*/
// These macros assume that a prototype's only properties are functions
#define KJS_DEFINE_PROTOTYPE(ClassProto) \
class ClassProto : public KJS::JSObject { \
friend KJS::JSObject* KJS_CACHEGLOBALOBJECT_NS cacheGlobalObject<ClassProto>(KJS::ExecState *exec, const KJS::Identifier &propertyName); \
public: \
static KJS::JSObject *self(KJS::ExecState *exec); \
virtual const KJS::ClassInfo *classInfo() const { return &info; } \
static const KJS::ClassInfo info; \
bool getOwnPropertySlot(KJS::ExecState *, const KJS::Identifier&, KJS::PropertySlot&); \
protected: \
ClassProto(KJS::ExecState *exec);\
static KJS::Identifier* s_name; \
static KJS::Identifier* name(); \
};
#define KJS_IMPLEMENT_PROTOTYPE_IMP(ClassName,ClassProto,ClassFunc,ClassProtoProto) \
const KJS::ClassInfo ClassProto::info = { ClassName, 0, &ClassProto##Table, 0 }; \
KJS::Identifier* ClassProto::s_name = 0; \
KJS::JSObject *ClassProto::self(KJS::ExecState *exec) \
{ \
return KJS_CACHEGLOBALOBJECT_NS cacheGlobalObject<ClassProto>(exec, *name()); \
} \
bool ClassProto::getOwnPropertySlot(KJS::ExecState *exec, const KJS::Identifier& propertyName, KJS::PropertySlot& slot) \
{ \
return KJS::getStaticFunctionSlot<ClassFunc, KJS::JSObject>(exec, &ClassProto##Table, this, propertyName, slot); \
} \
KJS::Identifier* ClassProto::name() \
{ \
if (!s_name) s_name = new KJS::Identifier("[[" ClassName ".prototype]]"); \
return s_name; \
}\
ClassProto::ClassProto(KJS::ExecState *exec): KJS::JSObject(ClassProtoProto::self(exec))
#define KJS_IMPLEMENT_PROTOTYPE(ClassName,ClassProto,ClassFunc,ClassProtoProto) \
KJS_IMPLEMENT_PROTOTYPE_IMP(ClassName,ClassProto,ClassFunc,ClassProtoProto) {}
#define KJS_IMPLEMENT_PROTOFUNC(ClassFunc) \
class ClassFunc : public KJS::InternalFunctionImp { \
public: \
ClassFunc(KJS::ExecState* exec, int i, int len, const KJS::Identifier& name) \
: InternalFunctionImp(static_cast<KJS::FunctionPrototype*>(exec->lexicalInterpreter()->builtinFunctionPrototype()), name) \
, id(i) \
{ \
put(exec, exec->propertyNames().length, KJS::jsNumber(len), KJS::DontDelete|KJS::ReadOnly|KJS::DontEnum); \
} \
/* Macro user needs to implement the callAsFunction function. */ \
virtual KJS::JSValue *callAsFunction(KJS::ExecState *exec, KJS::JSObject *thisObj, const KJS::List &args); \
private: \
int id; \
};
/*
* List of things to do when porting an objectimp to the 'static hashtable' mechanism:
* - write the hashtable source, between @begin and @end
* - add a rule to build the .lut.h
* - include the .lut.h
* - mention the table in the classinfo (add a classinfo if necessary)
* - write/update the class enum (for the tokens)
* - turn get() into getValueProperty(), put() into putValueProperty(), using a switch and removing funcs
* - write get() and/or put() using a template method
* - cleanup old stuff (e.g. hasProperty)
* - compile, test, commit ;)
*/
#endif

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