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-rw-r--r--src/libs/xpcom18a4/xpcom/ds/nsByteBuffer.cpp170
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
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+++ 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;
+}