1 /* 2 * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef Identifier_h 22 #define Identifier_h 23 24 #include "JSGlobalData.h" 25 #include "UString.h" 26 27 namespace JSC { 28 29 class ExecState; 30 31 class Identifier { 32 friend class Structure; 33 public: Identifier()34 Identifier() { } 35 Identifier(ExecState * exec,const char * s)36 Identifier(ExecState* exec, const char* s) : _ustring(add(exec, s)) { } // Only to be used with string literals. Identifier(ExecState * exec,const UChar * s,int length)37 Identifier(ExecState* exec, const UChar* s, int length) : _ustring(add(exec, s, length)) { } Identifier(ExecState * exec,UString::Rep * rep)38 Identifier(ExecState* exec, UString::Rep* rep) : _ustring(add(exec, rep)) { } Identifier(ExecState * exec,const UString & s)39 Identifier(ExecState* exec, const UString& s) : _ustring(add(exec, s.rep())) { } 40 Identifier(JSGlobalData * globalData,const char * s)41 Identifier(JSGlobalData* globalData, const char* s) : _ustring(add(globalData, s)) { } // Only to be used with string literals. Identifier(JSGlobalData * globalData,const UChar * s,int length)42 Identifier(JSGlobalData* globalData, const UChar* s, int length) : _ustring(add(globalData, s, length)) { } Identifier(JSGlobalData * globalData,UString::Rep * rep)43 Identifier(JSGlobalData* globalData, UString::Rep* rep) : _ustring(add(globalData, rep)) { } Identifier(JSGlobalData * globalData,const UString & s)44 Identifier(JSGlobalData* globalData, const UString& s) : _ustring(add(globalData, s.rep())) { } 45 46 // Special constructor for cases where we overwrite an object in place. Identifier(PlacementNewAdoptType)47 Identifier(PlacementNewAdoptType) : _ustring(PlacementNewAdopt) { } 48 ustring()49 const UString& ustring() const { return _ustring; } 50 data()51 const UChar* data() const { return _ustring.data(); } size()52 int size() const { return _ustring.size(); } 53 ascii()54 const char* ascii() const { return _ustring.ascii(); } 55 from(ExecState * exec,unsigned y)56 static Identifier from(ExecState* exec, unsigned y) { return Identifier(exec, UString::from(y)); } 57 isNull()58 bool isNull() const { return _ustring.isNull(); } isEmpty()59 bool isEmpty() const { return _ustring.isEmpty(); } 60 toUInt32(bool * ok)61 uint32_t toUInt32(bool* ok) const { return _ustring.toUInt32(ok); } toUInt32(bool * ok,bool tolerateEmptyString)62 uint32_t toUInt32(bool* ok, bool tolerateEmptyString) const { return _ustring.toUInt32(ok, tolerateEmptyString); }; toStrictUInt32(bool * ok)63 uint32_t toStrictUInt32(bool* ok) const { return _ustring.toStrictUInt32(ok); } toArrayIndex(bool * ok)64 unsigned toArrayIndex(bool* ok) const { return _ustring.toArrayIndex(ok); } toDouble()65 double toDouble() const { return _ustring.toDouble(); } 66 67 friend bool operator==(const Identifier&, const Identifier&); 68 friend bool operator!=(const Identifier&, const Identifier&); 69 70 friend bool operator==(const Identifier&, const char*); 71 friend bool operator!=(const Identifier&, const char*); 72 73 static void remove(UString::Rep*); 74 75 static bool equal(const UString::Rep*, const char*); 76 static bool equal(const UString::Rep*, const UChar*, int length); equal(const UString::Rep * a,const UString::Rep * b)77 static bool equal(const UString::Rep* a, const UString::Rep* b) { return JSC::equal(a, b); } 78 79 static PassRefPtr<UString::Rep> add(ExecState*, const char*); // Only to be used with string literals. 80 static PassRefPtr<UString::Rep> add(JSGlobalData*, const char*); // Only to be used with string literals. 81 82 private: 83 UString _ustring; 84 equal(const Identifier & a,const Identifier & b)85 static bool equal(const Identifier& a, const Identifier& b) { return a._ustring.rep() == b._ustring.rep(); } equal(const Identifier & a,const char * b)86 static bool equal(const Identifier& a, const char* b) { return equal(a._ustring.rep(), b); } 87 88 static PassRefPtr<UString::Rep> add(ExecState*, const UChar*, int length); 89 static PassRefPtr<UString::Rep> add(JSGlobalData*, const UChar*, int length); 90 add(ExecState * exec,UString::Rep * r)91 static PassRefPtr<UString::Rep> add(ExecState* exec, UString::Rep* r) 92 { 93 if (r->identifierTable()) { 94 #ifndef NDEBUG 95 checkSameIdentifierTable(exec, r); 96 #endif 97 return r; 98 } 99 return addSlowCase(exec, r); 100 } add(JSGlobalData * globalData,UString::Rep * r)101 static PassRefPtr<UString::Rep> add(JSGlobalData* globalData, UString::Rep* r) 102 { 103 if (r->identifierTable()) { 104 #ifndef NDEBUG 105 checkSameIdentifierTable(globalData, r); 106 #endif 107 return r; 108 } 109 return addSlowCase(globalData, r); 110 } 111 112 static PassRefPtr<UString::Rep> addSlowCase(ExecState*, UString::Rep* r); 113 static PassRefPtr<UString::Rep> addSlowCase(JSGlobalData*, UString::Rep* r); 114 115 static void checkSameIdentifierTable(ExecState*, UString::Rep*); 116 static void checkSameIdentifierTable(JSGlobalData*, UString::Rep*); 117 }; 118 119 inline bool operator==(const Identifier& a, const Identifier& b) 120 { 121 return Identifier::equal(a, b); 122 } 123 124 inline bool operator!=(const Identifier& a, const Identifier& b) 125 { 126 return !Identifier::equal(a, b); 127 } 128 129 inline bool operator==(const Identifier& a, const char* b) 130 { 131 return Identifier::equal(a, b); 132 } 133 134 inline bool operator!=(const Identifier& a, const char* b) 135 { 136 return !Identifier::equal(a, b); 137 } 138 139 IdentifierTable* createIdentifierTable(); 140 void deleteIdentifierTable(IdentifierTable*); 141 142 } // namespace JSC 143 144 #endif // Identifier_h 145