mirror of
https://github.com/rn10950/RetroZilla.git
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142 lines
3.9 KiB
C++
142 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsUnicharBuffer.h"
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#include "nsCRT.h"
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#define MIN_BUFFER_SIZE 32
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UnicharBufferImpl::UnicharBufferImpl()
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: mBuffer(NULL), mSpace(0), mLength(0)
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{
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}
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NS_METHOD
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UnicharBufferImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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UnicharBufferImpl* it = new UnicharBufferImpl();
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if (it == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(it);
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nsresult rv = it->QueryInterface(aIID, aResult);
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NS_RELEASE(it);
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return rv;
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}
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NS_IMETHODIMP
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UnicharBufferImpl::Init(PRUint32 aBufferSize)
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{
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if (aBufferSize < MIN_BUFFER_SIZE) {
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aBufferSize = MIN_BUFFER_SIZE;
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}
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mSpace = aBufferSize;
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mLength = 0;
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mBuffer = new PRUnichar[aBufferSize];
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return mBuffer ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
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}
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NS_IMPL_ISUPPORTS1(UnicharBufferImpl, nsIUnicharBuffer)
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UnicharBufferImpl::~UnicharBufferImpl()
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{
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if (nsnull != mBuffer) {
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delete[] mBuffer;
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mBuffer = nsnull;
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}
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mLength = 0;
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}
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NS_IMETHODIMP_(PRInt32)
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UnicharBufferImpl::GetLength() const
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{
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return mLength;
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}
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NS_IMETHODIMP_(PRInt32)
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UnicharBufferImpl::GetBufferSize() const
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{
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return mSpace;
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}
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NS_IMETHODIMP_(PRUnichar*)
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UnicharBufferImpl::GetBuffer() const
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{
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return mBuffer;
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}
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NS_IMETHODIMP_(PRBool)
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UnicharBufferImpl::Grow(PRInt32 aNewSize)
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{
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if (PRUint32(aNewSize) < MIN_BUFFER_SIZE) {
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aNewSize = MIN_BUFFER_SIZE;
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}
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PRUnichar* newbuf = new PRUnichar[aNewSize];
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if (nsnull != newbuf) {
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if (0 != mLength) {
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memcpy(newbuf, mBuffer, mLength * sizeof(PRUnichar));
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}
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delete[] mBuffer;
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mBuffer = newbuf;
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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NS_COM nsresult
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NS_NewUnicharBuffer(nsIUnicharBuffer** aInstancePtrResult,
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nsISupports* aOuter,
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PRUint32 aBufferSize)
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{
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nsresult rv;
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nsIUnicharBuffer* buf;
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rv = UnicharBufferImpl::Create(aOuter, NS_GET_IID(nsIUnicharBuffer),
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(void**)&buf);
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if (NS_FAILED(rv)) return rv;
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rv = buf->Init(aBufferSize);
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if (NS_FAILED(rv)) {
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NS_RELEASE(buf);
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return rv;
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}
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*aInstancePtrResult = buf;
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return rv;
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}
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