LCOV - code coverage report
Current view: directory - js/src/vm - StringObject.h (source / functions) Found Hit Coverage
Test: app.info Lines: 9 9 100.0 %
Date: 2012-06-02 Functions: 3 3 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  * vim: set ts=8 sw=4 et tw=78:
       3                 :  *
       4                 :  * ***** BEGIN LICENSE BLOCK *****
       5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       6                 :  *
       7                 :  * The contents of this file are subject to the Mozilla Public License Version
       8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       9                 :  * the License. You may obtain a copy of the License at
      10                 :  * http://www.mozilla.org/MPL/
      11                 :  *
      12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      14                 :  * for the specific language governing rights and limitations under the
      15                 :  * License.
      16                 :  *
      17                 :  * The Original Code is SpiderMonkey string object code.
      18                 :  *
      19                 :  * The Initial Developer of the Original Code is
      20                 :  * the Mozilla Foundation.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      22                 :  * the Initial Developer. All Rights Reserved.
      23                 :  *
      24                 :  * Contributor(s):
      25                 :  *   Jeff Walden <jwalden+code@mit.edu> (original author)
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      29                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : #ifndef StringObject_h___
      42                 : #define StringObject_h___
      43                 : 
      44                 : #include "mozilla/Attributes.h"
      45                 : 
      46                 : #include "jsobj.h"
      47                 : #include "jsstr.h"
      48                 : 
      49                 : namespace js {
      50                 : 
      51                 : class StringObject : public JSObject
      52                 : {
      53                 :     static const unsigned PRIMITIVE_VALUE_SLOT = 0;
      54                 :     static const unsigned LENGTH_SLOT = 1;
      55                 : 
      56                 :   public:
      57                 :     static const unsigned RESERVED_SLOTS = 2;
      58                 : 
      59                 :     /*
      60                 :      * Creates a new String object boxing the given string.  The object's
      61                 :      * [[Prototype]] is determined from context.
      62                 :      */
      63                 :     static inline StringObject *create(JSContext *cx, JSString *str);
      64                 : 
      65                 :     /*
      66                 :      * Identical to create(), but uses |proto| as [[Prototype]].  This method
      67                 :      * must not be used to create |String.prototype|.
      68                 :      */
      69                 :     static inline StringObject *createWithProto(JSContext *cx, JSString *str, JSObject &proto);
      70                 : 
      71          249270 :     JSString *unbox() const {
      72          249270 :         return getFixedSlot(PRIMITIVE_VALUE_SLOT).toString();
      73                 :     }
      74                 : 
      75                 :     inline size_t length() const {
      76                 :         return size_t(getFixedSlot(LENGTH_SLOT).toInt32());
      77                 :     }
      78                 : 
      79              69 :     static size_t getPrimitiveValueOffset() {
      80              69 :         return getFixedSlotOffset(PRIMITIVE_VALUE_SLOT);
      81                 :     }
      82                 : 
      83                 :   private:
      84                 :     inline bool init(JSContext *cx, JSString *str);
      85                 : 
      86         5008861 :     void setStringThis(JSString *str) {
      87         5008861 :         JS_ASSERT(getReservedSlot(PRIMITIVE_VALUE_SLOT).isUndefined());
      88         5008861 :         setFixedSlot(PRIMITIVE_VALUE_SLOT, StringValue(str));
      89         5008861 :         setFixedSlot(LENGTH_SLOT, Int32Value(int32_t(str->length())));
      90         5008861 :     }
      91                 : 
      92                 :     /* For access to init, as String.prototype is special. */
      93                 :     friend JSObject *
      94                 :     ::js_InitStringClass(JSContext *cx, JSObject *global);
      95                 : 
      96                 :     /*
      97                 :      * Compute the initial shape to associate with fresh String objects, which
      98                 :      * encodes the initial length property. Return the shape after changing
      99                 :      * this String object's last property to it.
     100                 :      */
     101                 :     Shape *assignInitialShape(JSContext *cx);
     102                 : 
     103                 :   private:
     104                 :     StringObject() MOZ_DELETE;
     105                 :     StringObject &operator=(const StringObject &so) MOZ_DELETE;
     106                 : };
     107                 : 
     108                 : } // namespace js
     109                 : 
     110                 : #endif /* StringObject_h__ */

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