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