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/*
* Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef Identifier_h
#define Identifier_h
#include "JSGlobalData.h"
#include "ThreadSpecific.h"
#include "UString.h"
#include <wtf/text/CString.h>
namespace JSC {
class ExecState;
class Identifier {
friend class Structure;
public:
Identifier() { }
Identifier(ExecState* exec, const char* s) : m_string(add(exec, s)) { } // Only to be used with string literals.
Identifier(ExecState* exec, const UChar* s, int length) : m_string(add(exec, s, length)) { }
Identifier(ExecState* exec, StringImpl* rep) : m_string(add(exec, rep)) { }
Identifier(ExecState* exec, const UString& s) : m_string(add(exec, s.impl())) { }
Identifier(JSGlobalData* globalData, const char* s) : m_string(add(globalData, s)) { } // Only to be used with string literals.
Identifier(JSGlobalData* globalData, const UChar* s, int length) : m_string(add(globalData, s, length)) { }
Identifier(JSGlobalData* globalData, StringImpl* rep) : m_string(add(globalData, rep)) { }
Identifier(JSGlobalData* globalData, const UString& s) : m_string(add(globalData, s.impl())) { }
const UString& ustring() const { return m_string; }
StringImpl* impl() const { return m_string.impl(); }
const UChar* characters() const { return m_string.characters(); }
int length() const { return m_string.length(); }
CString ascii() const { return m_string.ascii(); }
static Identifier from(ExecState* exec, unsigned y);
static Identifier from(ExecState* exec, int y);
static Identifier from(ExecState* exec, double y);
static Identifier from(JSGlobalData*, unsigned y);
static Identifier from(JSGlobalData*, int y);
static Identifier from(JSGlobalData*, double y);
static uint32_t toUInt32(const UString&, bool& ok);
uint32_t toUInt32(bool& ok) const { return toUInt32(m_string, ok); }
unsigned toArrayIndex(bool& ok) const;
bool isNull() const { return m_string.isNull(); }
bool isEmpty() const { return m_string.isEmpty(); }
friend bool operator==(const Identifier&, const Identifier&);
friend bool operator!=(const Identifier&, const Identifier&);
friend bool operator==(const Identifier&, const char*);
friend bool operator!=(const Identifier&, const char*);
static bool equal(const StringImpl*, const char*);
static bool equal(const StringImpl*, const UChar*, unsigned length);
static bool equal(const StringImpl* a, const StringImpl* b) { return ::equal(a, b); }
static PassRefPtr<StringImpl> add(ExecState*, const char*); // Only to be used with string literals.
static PassRefPtr<StringImpl> add(JSGlobalData*, const char*); // Only to be used with string literals.
private:
UString m_string;
static bool equal(const Identifier& a, const Identifier& b) { return a.m_string.impl() == b.m_string.impl(); }
static bool equal(const Identifier& a, const char* b) { return equal(a.m_string.impl(), b); }
static PassRefPtr<StringImpl> add(ExecState*, const UChar*, int length);
static PassRefPtr<StringImpl> add(JSGlobalData*, const UChar*, int length);
static PassRefPtr<StringImpl> add(ExecState* exec, StringImpl* r)
{
#ifndef NDEBUG
checkCurrentIdentifierTable(exec);
#endif
if (r->isIdentifier())
return r;
return addSlowCase(exec, r);
}
static PassRefPtr<StringImpl> add(JSGlobalData* globalData, StringImpl* r)
{
#ifndef NDEBUG
checkCurrentIdentifierTable(globalData);
#endif
if (r->isIdentifier())
return r;
return addSlowCase(globalData, r);
}
static PassRefPtr<StringImpl> addSlowCase(ExecState*, StringImpl* r);
static PassRefPtr<StringImpl> addSlowCase(JSGlobalData*, StringImpl* r);
static void checkCurrentIdentifierTable(ExecState*);
static void checkCurrentIdentifierTable(JSGlobalData*);
};
inline bool operator==(const Identifier& a, const Identifier& b)
{
return Identifier::equal(a, b);
}
inline bool operator!=(const Identifier& a, const Identifier& b)
{
return !Identifier::equal(a, b);
}
inline bool operator==(const Identifier& a, const char* b)
{
return Identifier::equal(a, b);
}
inline bool operator!=(const Identifier& a, const char* b)
{
return !Identifier::equal(a, b);
}
IdentifierTable* createIdentifierTable();
void deleteIdentifierTable(IdentifierTable*);
struct IdentifierRepHash : PtrHash<RefPtr<StringImpl> > {
static unsigned hash(const RefPtr<StringImpl>& key) { return key->existingHash(); }
static unsigned hash(StringImpl* key) { return key->existingHash(); }
};
} // namespace JSC
#endif // Identifier_h
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