LCOV - code coverage report
Current view: directory - xpcom/ds - nsUnicharBuffer.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 53 36 67.9 %
Date: 2012-06-02 Functions: 12 10 83.3 %

       1                 : /* -*- Mode: C++; tab-width: 2; 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                 :  *   Pierre Phaneuf <pp@ludusdesign.com>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "nsUnicharBuffer.h"
      40                 : #include "nsCRT.h"
      41                 : 
      42                 : #define MIN_BUFFER_SIZE 32
      43                 : 
      44            2750 : UnicharBufferImpl::UnicharBufferImpl()
      45            2750 :   : mBuffer(NULL), mSpace(0), mLength(0)
      46                 : {
      47            2750 : }
      48                 : 
      49                 : NS_METHOD
      50            2750 : UnicharBufferImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
      51                 : {
      52            2750 :   if (aOuter)
      53               0 :     return NS_ERROR_NO_AGGREGATION;
      54                 : 
      55            2750 :   UnicharBufferImpl* it = new UnicharBufferImpl();
      56            2750 :   if (it == nsnull) 
      57               0 :     return NS_ERROR_OUT_OF_MEMORY;
      58                 : 
      59            2750 :   NS_ADDREF(it);
      60            2750 :   nsresult rv = it->QueryInterface(aIID, aResult);
      61            2750 :   NS_RELEASE(it);
      62            2750 :   return rv;
      63                 : }
      64                 : 
      65                 : NS_IMETHODIMP
      66            2750 : UnicharBufferImpl::Init(PRUint32 aBufferSize)
      67                 : {
      68            2750 :   if (aBufferSize < MIN_BUFFER_SIZE) {
      69              24 :     aBufferSize = MIN_BUFFER_SIZE;
      70                 :   }
      71            2750 :   mSpace = aBufferSize;
      72            2750 :   mLength = 0;
      73            5500 :   mBuffer = new PRUnichar[aBufferSize];
      74            2750 :   return mBuffer ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
      75                 : }
      76                 : 
      77           24750 : NS_IMPL_ISUPPORTS1(UnicharBufferImpl, nsIUnicharBuffer)
      78                 : 
      79            2750 : UnicharBufferImpl::~UnicharBufferImpl()
      80                 : {
      81            2750 :   if (nsnull != mBuffer) {
      82            2750 :     delete[] mBuffer;
      83            2750 :     mBuffer = nsnull;
      84                 :   }
      85            2750 :   mLength = 0;
      86            2750 : }
      87                 : 
      88                 : NS_IMETHODIMP_(PRInt32)
      89               0 : UnicharBufferImpl::GetLength() const
      90                 : {
      91               0 :   return mLength;
      92                 : }
      93                 : 
      94                 : NS_IMETHODIMP_(PRInt32)
      95            9269 : UnicharBufferImpl::GetBufferSize() const
      96                 : {
      97            9269 :   return mSpace;
      98                 : }
      99                 : 
     100                 : NS_IMETHODIMP_(PRUnichar*)
     101           12618 : UnicharBufferImpl::GetBuffer() const
     102                 : {
     103           12618 :   return mBuffer;
     104                 : }
     105                 : 
     106                 : NS_IMETHODIMP_(bool)
     107               0 : UnicharBufferImpl::Grow(PRInt32 aNewSize)
     108                 : {
     109               0 :   if (PRUint32(aNewSize) < MIN_BUFFER_SIZE) {
     110               0 :     aNewSize = MIN_BUFFER_SIZE;
     111                 :   }
     112               0 :   PRUnichar* newbuf = new PRUnichar[aNewSize];
     113               0 :   if (nsnull != newbuf) {
     114               0 :     if (0 != mLength) {
     115               0 :       memcpy(newbuf, mBuffer, mLength * sizeof(PRUnichar));
     116                 :     }
     117               0 :     delete[] mBuffer;
     118               0 :     mBuffer = newbuf;
     119               0 :     return true;
     120                 :   }
     121               0 :   return false;
     122                 : }
     123                 : 
     124                 : nsresult
     125            2750 : NS_NewUnicharBuffer(nsIUnicharBuffer** aInstancePtrResult,
     126                 :                     nsISupports* aOuter,
     127                 :                     PRUint32 aBufferSize)
     128                 : {
     129                 :   nsresult rv;
     130                 :   nsIUnicharBuffer* buf;
     131                 :   rv = UnicharBufferImpl::Create(aOuter, NS_GET_IID(nsIUnicharBuffer), 
     132            2750 :                                  (void**)&buf);
     133            2750 :   if (NS_FAILED(rv)) return rv;
     134            2750 :   rv = buf->Init(aBufferSize);
     135            2750 :   if (NS_FAILED(rv)) {
     136               0 :     NS_RELEASE(buf);
     137               0 :     return rv;
     138                 :   }
     139            2750 :   *aInstancePtrResult = buf;
     140            2750 :   return rv;
     141                 : }

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