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109 lines
2.3 KiB
C++
109 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 == nullptr)
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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 (nullptr != mBuffer) {
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delete[] mBuffer;
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mBuffer = nullptr;
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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_(bool)
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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 (nullptr != 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 true;
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}
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return false;
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}
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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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