kjs/identifier.h

   1 /*
   2  *  Copyright (C) 2003, 2006, 2007 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 KJS_IDENTIFIER_H
  22 #define KJS_IDENTIFIER_H
  23
  24 #include "ustring.h"
  25
  26 namespace KJS {
  27
  28     class Identifier {
  29         friend class PropertyMap;
  30     public:
  31         Identifier() { }
  32         Identifier(const char* s) : _ustring(add(s)) { }
  33         Identifier(const UChar* s, int length) : _ustring(add(s, length)) { }
  34         explicit Identifier(UString::Rep* rep) : _ustring(add(rep)) { }
  35         explicit Identifier(const UString& s) : _ustring(add(s.rep())) { }
  36
  37         // Special constructor for cases where we overwrite an object in place.
  38         Identifier(PlacementNewAdoptType) : _ustring(PlacementNewAdopt) { }
  39
  40         const UString& ustring() const { return _ustring; }
  41         DOM::DOMString domString() const;
  42
  43         const UChar* data() const { return _ustring.data(); }
  44         int size() const { return _ustring.size(); }
  45
  46         const char* ascii() const { return _ustring.ascii(); }
  47
  48         static Identifier from(unsigned y) { return Identifier(UString::from(y)); }
  49
  50         bool isNull() const { return _ustring.isNull(); }
  51         bool isEmpty() const { return _ustring.isEmpty(); }
  52
  53         uint32_t toUInt32(bool* ok) const { return _ustring.toUInt32(ok); }
  54         uint32_t toUInt32(bool* ok, bool tolerateEmptyString) const { return _ustring.toUInt32(ok, tolerateEmptyString); };
  55         uint32_t toStrictUInt32(bool* ok) const { return _ustring.toStrictUInt32(ok); }
  56         unsigned toArrayIndex(bool* ok) const { return _ustring.toArrayIndex(ok); }
  57         double toDouble() const { return _ustring.toDouble(); }
  58
  59         friend bool operator==(const Identifier&, const Identifier&);
  60         friend bool operator!=(const Identifier&, const Identifier&);
  61
  62         friend bool operator==(const Identifier&, const char*);
  63
  64         static void remove(UString::Rep* );
  65
  66         static bool equal(const UString::Rep*, const char*);
  67         static bool equal(const UString::Rep*, const UChar*, int length);
  68         static bool equal(const UString::Rep*, const UString::Rep*);
  69
  70     private:
  71         UString _ustring;
  72
  73         static bool equal(const Identifier& a, const Identifier& b)
  74             { return a._ustring.rep() == b._ustring.rep(); }
  75         static bool equal(const Identifier& a, const char* b)
  76             { return equal(a._ustring.rep(), b); }
  77
  78         static PassRefPtr<UString::Rep> add(const char*);
  79         static PassRefPtr<UString::Rep> add(const UChar*, int length);
  80         static PassRefPtr<UString::Rep> add(UString::Rep* r)
  81         {
  82             if (r->isIdentifier)
  83                 return r;
  84             return addSlowCase(r);
  85         }
  86         static PassRefPtr<UString::Rep> addSlowCase(UString::Rep *r);
  87     };
  88
  89     inline bool operator==(const Identifier& a, const Identifier& b)
  90         { return Identifier::equal(a, b); }
  91
  92     inline bool operator!=(const Identifier& a, const Identifier& b)
  93         { return !Identifier::equal(a, b); }
  94
  95     inline bool operator==(const Identifier& a, const char* b)
  96         { return Identifier::equal(a, b); }
  97
  98 } // namespace KJS
  99
 100 #endif // KJS_IDENTIFIER_H