mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
138 lines
3.0 KiB
C++
138 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsByteBuffer.h"
|
|
#include "nsIInputStream.h"
|
|
#include "nsCRT.h"
|
|
|
|
#define MIN_BUFFER_SIZE 32
|
|
|
|
ByteBufferImpl::ByteBufferImpl(void)
|
|
: mBuffer(NULL), mSpace(0), mLength(0)
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
ByteBufferImpl::Init(PRUint32 aBufferSize)
|
|
{
|
|
if (aBufferSize < MIN_BUFFER_SIZE) {
|
|
aBufferSize = MIN_BUFFER_SIZE;
|
|
}
|
|
mSpace = aBufferSize;
|
|
mLength = 0;
|
|
mBuffer = new char[aBufferSize];
|
|
return mBuffer ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS1(ByteBufferImpl,nsIByteBuffer)
|
|
|
|
ByteBufferImpl::~ByteBufferImpl()
|
|
{
|
|
if (nsnull != mBuffer) {
|
|
delete[] mBuffer;
|
|
mBuffer = nsnull;
|
|
}
|
|
mLength = 0;
|
|
}
|
|
|
|
nsresult
|
|
ByteBufferImpl::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
|
|
{
|
|
if (aOuter)
|
|
return NS_ERROR_NO_AGGREGATION;
|
|
|
|
ByteBufferImpl* it = new ByteBufferImpl();
|
|
if (nsnull == it)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
NS_ADDREF(it);
|
|
nsresult rv = it->QueryInterface(aIID, (void**)aResult);
|
|
NS_RELEASE(it);
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP_(PRUint32)
|
|
ByteBufferImpl::GetLength(void) const
|
|
{
|
|
return mLength;
|
|
}
|
|
|
|
NS_IMETHODIMP_(PRUint32)
|
|
ByteBufferImpl::GetBufferSize(void) const
|
|
{
|
|
return mSpace;
|
|
}
|
|
|
|
NS_IMETHODIMP_(char*)
|
|
ByteBufferImpl::GetBuffer(void) const
|
|
{
|
|
return mBuffer;
|
|
}
|
|
|
|
NS_IMETHODIMP_(bool)
|
|
ByteBufferImpl::Grow(PRUint32 aNewSize)
|
|
{
|
|
if (aNewSize < MIN_BUFFER_SIZE) {
|
|
aNewSize = MIN_BUFFER_SIZE;
|
|
}
|
|
char* newbuf = new char[aNewSize];
|
|
if (nsnull != newbuf) {
|
|
if (0 != mLength) {
|
|
memcpy(newbuf, mBuffer, mLength);
|
|
}
|
|
delete[] mBuffer;
|
|
mBuffer = newbuf;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
NS_IMETHODIMP_(PRInt32)
|
|
ByteBufferImpl::Fill(nsresult* aErrorCode, nsIInputStream* aStream,
|
|
PRUint32 aKeep)
|
|
{
|
|
NS_PRECONDITION(nsnull != aStream, "null stream");
|
|
NS_PRECONDITION(aKeep <= mLength, "illegal keep count");
|
|
if ((nsnull == aStream) || (PRUint32(aKeep) > PRUint32(mLength))) {
|
|
// whoops
|
|
*aErrorCode = NS_BASE_STREAM_ILLEGAL_ARGS;
|
|
return -1;
|
|
}
|
|
|
|
if (0 != aKeep) {
|
|
// Slide over kept data
|
|
memmove(mBuffer, mBuffer + (mLength - aKeep), aKeep);
|
|
}
|
|
|
|
// Read in some new data
|
|
mLength = aKeep;
|
|
PRUint32 nb;
|
|
*aErrorCode = aStream->Read(mBuffer + aKeep, mSpace - aKeep, &nb);
|
|
if (NS_SUCCEEDED(*aErrorCode)) {
|
|
mLength += nb;
|
|
}
|
|
else
|
|
nb = 0;
|
|
return nb;
|
|
}
|
|
|
|
nsresult NS_NewByteBuffer(nsIByteBuffer** aInstancePtrResult,
|
|
nsISupports* aOuter,
|
|
PRUint32 aBufferSize)
|
|
{
|
|
nsresult rv;
|
|
nsIByteBuffer* buf;
|
|
rv = ByteBufferImpl::Create(aOuter, NS_GET_IID(nsIByteBuffer), (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;
|
|
}
|