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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
commit | 16f504a9dca3fe3b70568f67b7d41241ae485288 (patch) | |
tree | c60f36ada0496ba928b7161059ba5ab1ab224f9d /src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp | |
parent | Initial commit. (diff) | |
download | virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.tar.xz virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.zip |
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp')
-rw-r--r-- | src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp b/src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp new file mode 100644 index 00000000..a51ff9d6 --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp @@ -0,0 +1,170 @@ +/* -*- 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 "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; +} + +NS_METHOD +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_(PRBool) +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 PR_TRUE; + } + return PR_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; +} + +NS_COM 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; +} |