runtime/ScopeChain.cpp

   1 /*
   2  *  Copyright (C) 2003, 2006, 2008 Apple Inc.
   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 #include "config.h"
  22 #include "ScopeChain.h"
  23
  24 #include "JSActivation.h"
  25 #include "JSGlobalObject.h"
  26 #include "JSObject.h"
  27 #include "PropertyNameArray.h"
  28 #include <stdio.h>
  29
  30 namespace JSC {
  31
  32 #ifndef NDEBUG
  33
  34 void ScopeChainNode::print() const
  35 {
  36     ScopeChainIterator scopeEnd = end();
  37     for (ScopeChainIterator scopeIter = begin(); scopeIter != scopeEnd; ++scopeIter) {
  38         JSObject* o = *scopeIter;
  39         PropertyNameArray propertyNames(globalObject->globalExec());
  40         o->getPropertyNames(globalObject->globalExec(), propertyNames);
  41         PropertyNameArray::const_iterator propEnd = propertyNames.end();
  42
  43         fprintf(stderr, "----- [scope %p] -----\n", o);
  44         for (PropertyNameArray::const_iterator propIter = propertyNames.begin(); propIter != propEnd; propIter++) {
  45             Identifier name = *propIter;
  46             fprintf(stderr, "%s, ", name.ascii());
  47         }
  48         fprintf(stderr, "\n");
  49     }
  50 }
  51
  52 #endif
  53
  54 int ScopeChain::localDepth() const
  55 {
  56     int scopeDepth = 0;
  57     ScopeChainIterator iter = this->begin();
  58     ScopeChainIterator end = this->end();
  59     while (!(*iter)->inherits(&JSActivation::info)) {
  60         ++iter;
  61         if (iter == end)
  62             break;
  63         ++scopeDepth;
  64     }
  65     return scopeDepth;
  66 }
  67
  68 } // namespace JSC