LCOV - code coverage report
Current view: directory - xpcom/ds - nsSupportsArrayEnumerator.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 58 36 62.1 %
Date: 2012-06-02 Functions: 12 9 75.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsSupportsArrayEnumerator.h"
      39                 : #include "nsISupportsArray.h"
      40                 : 
      41             306 : nsSupportsArrayEnumerator::nsSupportsArrayEnumerator(nsISupportsArray* array)
      42             306 :   : mArray(array), mCursor(0)
      43                 : {
      44             306 :   NS_ASSERTION(array, "null array");
      45             306 :   NS_ADDREF(mArray);
      46             306 : }
      47                 : 
      48             306 : nsSupportsArrayEnumerator::~nsSupportsArrayEnumerator()
      49                 : {
      50             306 :   NS_RELEASE(mArray);
      51             306 : }
      52                 : 
      53            1836 : NS_IMPL_ISUPPORTS2(nsSupportsArrayEnumerator, nsIBidirectionalEnumerator, nsIEnumerator)
      54                 : 
      55                 : NS_IMETHODIMP
      56             306 : nsSupportsArrayEnumerator::First()
      57                 : {
      58             306 :   mCursor = 0;
      59                 :   PRUint32 cnt;
      60             306 :   nsresult rv = mArray->Count(&cnt);
      61             306 :   if (NS_FAILED(rv)) return rv;
      62             306 :   PRInt32 end = (PRInt32)cnt;
      63             306 :   if (mCursor < end)
      64             306 :     return NS_OK;
      65                 :   else
      66               0 :     return NS_ERROR_FAILURE;
      67                 : }
      68                 : 
      69                 : NS_IMETHODIMP
      70          130050 : nsSupportsArrayEnumerator::Next()
      71                 : {
      72                 :   PRUint32 cnt;
      73          130050 :   nsresult rv = mArray->Count(&cnt);
      74          130050 :   if (NS_FAILED(rv)) return rv;
      75          130050 :   PRInt32 end = (PRInt32)cnt;
      76          130050 :   if (mCursor < end)   // don't count upward forever
      77          130050 :     mCursor++;
      78          130050 :   if (mCursor < end)
      79          129744 :     return NS_OK;
      80                 :   else
      81             306 :     return NS_ERROR_FAILURE;
      82                 : }
      83                 : 
      84                 : NS_IMETHODIMP
      85          130050 : nsSupportsArrayEnumerator::CurrentItem(nsISupports **aItem)
      86                 : {
      87          130050 :   NS_ASSERTION(aItem, "null out parameter");
      88                 :   PRUint32 cnt;
      89          130050 :   nsresult rv = mArray->Count(&cnt);
      90          130050 :   if (NS_FAILED(rv)) return rv;
      91          130050 :   if (mCursor >= 0 && mCursor < (PRInt32)cnt) {
      92          130050 :     *aItem = mArray->ElementAt(mCursor);
      93          130050 :     return NS_OK;
      94                 :   }
      95               0 :   return NS_ERROR_FAILURE;
      96                 : }
      97                 : 
      98                 : NS_IMETHODIMP
      99          130356 : nsSupportsArrayEnumerator::IsDone()
     100                 : {
     101                 :   PRUint32 cnt;
     102          130356 :   nsresult rv = mArray->Count(&cnt);
     103          130356 :   if (NS_FAILED(rv)) return rv;
     104                 :   return (mCursor >= 0 && mCursor < (PRInt32)cnt)
     105          130356 :     ? NS_ENUMERATOR_FALSE : NS_OK;
     106                 : }
     107                 : 
     108                 : ////////////////////////////////////////////////////////////////////////////////
     109                 : 
     110                 : NS_IMETHODIMP
     111               0 : nsSupportsArrayEnumerator::Last()
     112                 : {
     113                 :   PRUint32 cnt;
     114               0 :   nsresult rv = mArray->Count(&cnt);
     115               0 :   if (NS_FAILED(rv)) return rv;
     116               0 :   mCursor = cnt - 1;
     117               0 :   return NS_OK;
     118                 : }
     119                 : 
     120                 : NS_IMETHODIMP
     121               0 : nsSupportsArrayEnumerator::Prev()
     122                 : {
     123               0 :   if (mCursor >= 0)
     124               0 :     --mCursor;
     125               0 :   if (mCursor >= 0)
     126               0 :     return NS_OK;
     127                 :   else
     128               0 :     return NS_ERROR_FAILURE;
     129                 : }
     130                 : 
     131                 : ////////////////////////////////////////////////////////////////////////////////
     132                 : 
     133                 : nsresult
     134               0 : NS_NewISupportsArrayEnumerator(nsISupportsArray* array,
     135                 :                                nsIBidirectionalEnumerator* *aInstancePtrResult)
     136                 : {
     137               0 :   if (aInstancePtrResult == 0)
     138               0 :     return NS_ERROR_NULL_POINTER;
     139               0 :   nsSupportsArrayEnumerator* e = new nsSupportsArrayEnumerator(array);
     140               0 :   if (e == 0)
     141               0 :     return NS_ERROR_OUT_OF_MEMORY;
     142               0 :   NS_ADDREF(e);
     143               0 :   *aInstancePtrResult = e;
     144               0 :   return NS_OK;
     145                 : }
     146                 : 
     147                 : ////////////////////////////////////////////////////////////////////////////////
     148                 : 

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