зеркало из https://github.com/mozilla/pjs.git
834 строки
23 KiB
C++
834 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/**
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* This file contains implementations of the nsIBinaryInputStream and
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* nsIBinaryOutputStream interfaces. Together, these interfaces allows reading
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* and writing of primitive data types (integers, floating-point values,
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* booleans, etc.) to a stream in a binary, untagged, fixed-endianness format.
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* This might be used, for example, to implement network protocols or to
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* produce architecture-neutral binary disk files, i.e. ones that can be read
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* and written by both big-endian and little-endian platforms. Output is
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* written in big-endian order (high-order byte first), as this is traditional
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* network order.
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*
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* @See nsIBinaryInputStream
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* @See nsIBinaryOutputStream
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*/
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#include <string.h>
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#include "nsBinaryStream.h"
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#include "nsCRT.h"
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#include "nsIStreamBufferAccess.h"
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#include "prlong.h"
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#include "nsString.h"
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#include "nsISerializable.h"
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#include "nsIClassInfo.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIURI.h" // for NS_IURI_IID
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NS_IMPL_ISUPPORTS3(nsBinaryOutputStream, nsIObjectOutputStream, nsIBinaryOutputStream, nsIOutputStream)
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NS_IMETHODIMP
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nsBinaryOutputStream::Flush()
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{
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NS_ENSURE_STATE(mOutputStream);
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return mOutputStream->Flush();
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Close()
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{
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NS_ENSURE_STATE(mOutputStream);
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return mOutputStream->Close();
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Write(const char *aBuf, PRUint32 aCount, PRUint32 *aActualBytes)
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{
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NS_ENSURE_STATE(mOutputStream);
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return mOutputStream->Write(aBuf, aCount, aActualBytes);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteFrom(nsIInputStream *inStr, PRUint32 count, PRUint32 *_retval)
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{
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NS_NOTREACHED("WriteFrom");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteSegments(nsReadSegmentFun reader, void * closure, PRUint32 count, PRUint32 *_retval)
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{
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NS_NOTREACHED("WriteSegments");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::IsNonBlocking(bool *aNonBlocking)
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{
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NS_ENSURE_STATE(mOutputStream);
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return mOutputStream->IsNonBlocking(aNonBlocking);
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}
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nsresult
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nsBinaryOutputStream::WriteFully(const char *aBuf, PRUint32 aCount)
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{
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NS_ENSURE_STATE(mOutputStream);
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nsresult rv;
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PRUint32 bytesWritten;
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rv = mOutputStream->Write(aBuf, aCount, &bytesWritten);
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if (NS_FAILED(rv)) return rv;
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if (bytesWritten != aCount)
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return NS_ERROR_FAILURE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::SetOutputStream(nsIOutputStream *aOutputStream)
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{
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NS_ENSURE_ARG_POINTER(aOutputStream);
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mOutputStream = aOutputStream;
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mBufferAccess = do_QueryInterface(aOutputStream);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteBoolean(bool aBoolean)
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{
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return Write8(aBoolean);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Write8(PRUint8 aByte)
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{
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return WriteFully((const char*)&aByte, sizeof aByte);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Write16(PRUint16 a16)
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{
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a16 = NS_SWAP16(a16);
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return WriteFully((const char*)&a16, sizeof a16);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Write32(PRUint32 a32)
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{
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a32 = NS_SWAP32(a32);
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return WriteFully((const char*)&a32, sizeof a32);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::Write64(PRUint64 a64)
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{
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nsresult rv;
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PRUint32 bytesWritten;
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a64 = NS_SWAP64(a64);
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rv = Write(reinterpret_cast<char*>(&a64), sizeof a64, &bytesWritten);
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if (NS_FAILED(rv)) return rv;
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if (bytesWritten != sizeof a64)
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return NS_ERROR_FAILURE;
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteFloat(float aFloat)
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{
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NS_ASSERTION(sizeof(float) == sizeof (PRUint32),
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"False assumption about sizeof(float)");
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return Write32(*reinterpret_cast<PRUint32*>(&aFloat));
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteDouble(double aDouble)
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{
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NS_ASSERTION(sizeof(double) == sizeof(PRUint64),
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"False assumption about sizeof(double)");
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return Write64(*reinterpret_cast<PRUint64*>(&aDouble));
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteStringZ(const char *aString)
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{
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PRUint32 length;
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nsresult rv;
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length = strlen(aString);
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rv = Write32(length);
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if (NS_FAILED(rv)) return rv;
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return WriteFully(aString, length);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteWStringZ(const PRUnichar* aString)
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{
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PRUint32 length, byteCount;
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nsresult rv;
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length = nsCRT::strlen(aString);
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rv = Write32(length);
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if (NS_FAILED(rv)) return rv;
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if (length == 0)
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return NS_OK;
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byteCount = length * sizeof(PRUnichar);
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#ifdef IS_BIG_ENDIAN
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rv = WriteBytes(reinterpret_cast<const char*>(aString), byteCount);
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#else
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// XXX use WriteSegments here to avoid copy!
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PRUnichar *copy, temp[64];
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if (length <= 64) {
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copy = temp;
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} else {
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copy = reinterpret_cast<PRUnichar*>(moz_malloc(byteCount));
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if (!copy)
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ASSERTION((PRUptrdiff(aString) & 0x1) == 0, "aString not properly aligned");
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for (PRUint32 i = 0; i < length; i++)
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copy[i] = NS_SWAP16(aString[i]);
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rv = WriteBytes(reinterpret_cast<const char*>(copy), byteCount);
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if (copy != temp)
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moz_free(copy);
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#endif
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteUtf8Z(const PRUnichar* aString)
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{
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return WriteStringZ(NS_ConvertUTF16toUTF8(aString).get());
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteBytes(const char *aString, PRUint32 aLength)
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{
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nsresult rv;
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PRUint32 bytesWritten;
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rv = Write(aString, aLength, &bytesWritten);
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if (NS_FAILED(rv)) return rv;
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if (bytesWritten != aLength)
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return NS_ERROR_FAILURE;
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteByteArray(PRUint8 *aBytes, PRUint32 aLength)
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{
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return WriteBytes(reinterpret_cast<char *>(aBytes), aLength);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteObject(nsISupports* aObject, bool aIsStrongRef)
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{
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return WriteCompoundObject(aObject, NS_GET_IID(nsISupports),
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aIsStrongRef);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteSingleRefObject(nsISupports* aObject)
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{
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return WriteCompoundObject(aObject, NS_GET_IID(nsISupports),
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true);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteCompoundObject(nsISupports* aObject,
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const nsIID& aIID,
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bool aIsStrongRef)
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{
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// Can't deal with weak refs
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NS_ENSURE_TRUE(aIsStrongRef, NS_ERROR_UNEXPECTED);
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nsCOMPtr<nsIClassInfo> classInfo = do_QueryInterface(aObject);
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NS_ENSURE_TRUE(classInfo, NS_ERROR_NOT_AVAILABLE);
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nsCOMPtr<nsISerializable> serializable = do_QueryInterface(aObject);
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NS_ENSURE_TRUE(serializable, NS_ERROR_NOT_AVAILABLE);
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nsCID cid;
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classInfo->GetClassIDNoAlloc(&cid);
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nsresult rv = WriteID(cid);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = WriteID(aIID);
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NS_ENSURE_SUCCESS(rv, rv);
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return serializable->Write(this);
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteID(const nsIID& aIID)
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{
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nsresult rv = Write32(aIID.m0);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = Write16(aIID.m1);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = Write16(aIID.m2);
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NS_ENSURE_SUCCESS(rv, rv);
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for (int i = 0; i < 8; ++i) {
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rv = Write8(aIID.m3[i]);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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NS_IMETHODIMP_(char*)
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nsBinaryOutputStream::GetBuffer(PRUint32 aLength, PRUint32 aAlignMask)
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{
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if (mBufferAccess)
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return mBufferAccess->GetBuffer(aLength, aAlignMask);
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return nsnull;
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}
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NS_IMETHODIMP_(void)
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nsBinaryOutputStream::PutBuffer(char* aBuffer, PRUint32 aLength)
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{
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if (mBufferAccess)
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mBufferAccess->PutBuffer(aBuffer, aLength);
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}
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NS_IMPL_ISUPPORTS3(nsBinaryInputStream, nsIObjectInputStream, nsIBinaryInputStream, nsIInputStream)
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NS_IMETHODIMP
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nsBinaryInputStream::Available(PRUint32* aResult)
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{
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NS_ENSURE_STATE(mInputStream);
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return mInputStream->Available(aResult);
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Read(char* aBuffer, PRUint32 aCount, PRUint32 *aNumRead)
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{
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NS_ENSURE_STATE(mInputStream);
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// mInputStream might give us short reads, so deal with that.
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PRUint32 totalRead = 0;
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PRUint32 bytesRead;
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do {
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nsresult rv = mInputStream->Read(aBuffer, aCount, &bytesRead);
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if (rv == NS_BASE_STREAM_WOULD_BLOCK && totalRead != 0) {
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// We already read some data. Return it.
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break;
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}
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if (NS_FAILED(rv)) {
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return rv;
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}
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totalRead += bytesRead;
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aBuffer += bytesRead;
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aCount -= bytesRead;
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} while (aCount != 0 && bytesRead != 0);
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*aNumRead = totalRead;
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return NS_OK;
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}
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// when forwarding ReadSegments to mInputStream, we need to make sure
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// 'this' is being passed to the writer each time. To do this, we need
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// a thunking function which keeps the real input stream around.
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// the closure wrapper
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struct ReadSegmentsClosure {
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nsIInputStream* mRealInputStream;
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void* mRealClosure;
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nsWriteSegmentFun mRealWriter;
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nsresult mRealResult;
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PRUint32 mBytesRead; // to properly implement aToOffset
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};
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// the thunking function
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static NS_METHOD
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ReadSegmentForwardingThunk(nsIInputStream* aStream,
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void *aClosure,
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const char* aFromSegment,
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PRUint32 aToOffset,
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PRUint32 aCount,
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PRUint32 *aWriteCount)
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{
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ReadSegmentsClosure* thunkClosure =
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reinterpret_cast<ReadSegmentsClosure*>(aClosure);
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NS_ASSERTION(NS_SUCCEEDED(thunkClosure->mRealResult),
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"How did this get to be a failure status?");
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thunkClosure->mRealResult =
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thunkClosure->mRealWriter(thunkClosure->mRealInputStream,
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thunkClosure->mRealClosure,
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aFromSegment,
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thunkClosure->mBytesRead + aToOffset,
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aCount, aWriteCount);
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return thunkClosure->mRealResult;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadSegments(nsWriteSegmentFun writer, void * closure, PRUint32 count, PRUint32 *_retval)
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{
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NS_ENSURE_STATE(mInputStream);
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ReadSegmentsClosure thunkClosure = { this, closure, writer, NS_OK, 0 };
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// mInputStream might give us short reads, so deal with that.
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PRUint32 bytesRead;
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do {
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nsresult rv = mInputStream->ReadSegments(ReadSegmentForwardingThunk,
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&thunkClosure,
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count, &bytesRead);
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if (rv == NS_BASE_STREAM_WOULD_BLOCK && thunkClosure.mBytesRead != 0) {
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// We already read some data. Return it.
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break;
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}
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if (NS_FAILED(rv)) {
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return rv;
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}
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thunkClosure.mBytesRead += bytesRead;
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count -= bytesRead;
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} while (count != 0 && bytesRead != 0 &&
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NS_SUCCEEDED(thunkClosure.mRealResult));
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*_retval = thunkClosure.mBytesRead;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::IsNonBlocking(bool *aNonBlocking)
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{
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NS_ENSURE_STATE(mInputStream);
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return mInputStream->IsNonBlocking(aNonBlocking);
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Close()
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{
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NS_ENSURE_STATE(mInputStream);
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return mInputStream->Close();
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}
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NS_IMETHODIMP
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nsBinaryInputStream::SetInputStream(nsIInputStream *aInputStream)
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{
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NS_ENSURE_ARG_POINTER(aInputStream);
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mInputStream = aInputStream;
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mBufferAccess = do_QueryInterface(aInputStream);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadBoolean(bool* aBoolean)
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{
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PRUint8 byteResult;
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nsresult rv = Read8(&byteResult);
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if (NS_FAILED(rv)) return rv;
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*aBoolean = !!byteResult;
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Read8(PRUint8* aByte)
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{
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nsresult rv;
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PRUint32 bytesRead;
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rv = Read(reinterpret_cast<char*>(aByte), sizeof(*aByte), &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != 1)
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return NS_ERROR_FAILURE;
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Read16(PRUint16* a16)
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{
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nsresult rv;
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PRUint32 bytesRead;
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rv = Read(reinterpret_cast<char*>(a16), sizeof *a16, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != sizeof *a16)
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return NS_ERROR_FAILURE;
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*a16 = NS_SWAP16(*a16);
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Read32(PRUint32* a32)
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{
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nsresult rv;
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PRUint32 bytesRead;
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rv = Read(reinterpret_cast<char*>(a32), sizeof *a32, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != sizeof *a32)
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return NS_ERROR_FAILURE;
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*a32 = NS_SWAP32(*a32);
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Read64(PRUint64* a64)
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{
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nsresult rv;
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PRUint32 bytesRead;
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rv = Read(reinterpret_cast<char*>(a64), sizeof *a64, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != sizeof *a64)
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return NS_ERROR_FAILURE;
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*a64 = NS_SWAP64(*a64);
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return rv;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadFloat(float* aFloat)
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{
|
|
NS_ASSERTION(sizeof(float) == sizeof (PRUint32),
|
|
"False assumption about sizeof(float)");
|
|
return Read32(reinterpret_cast<PRUint32*>(aFloat));
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadDouble(double* aDouble)
|
|
{
|
|
NS_ASSERTION(sizeof(double) == sizeof(PRUint64),
|
|
"False assumption about sizeof(double)");
|
|
return Read64(reinterpret_cast<PRUint64*>(aDouble));
|
|
}
|
|
|
|
static NS_METHOD
|
|
WriteSegmentToCString(nsIInputStream* aStream,
|
|
void *aClosure,
|
|
const char* aFromSegment,
|
|
PRUint32 aToOffset,
|
|
PRUint32 aCount,
|
|
PRUint32 *aWriteCount)
|
|
{
|
|
nsACString* outString = static_cast<nsACString*>(aClosure);
|
|
|
|
outString->Append(aFromSegment, aCount);
|
|
|
|
*aWriteCount = aCount;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadCString(nsACString& aString)
|
|
{
|
|
nsresult rv;
|
|
PRUint32 length, bytesRead;
|
|
|
|
rv = Read32(&length);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
aString.Truncate();
|
|
rv = ReadSegments(WriteSegmentToCString, &aString, length, &bytesRead);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
if (bytesRead != length)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
// sometimes, WriteSegmentToString will be handed an odd-number of
|
|
// bytes, which means we only have half of the last PRUnichar
|
|
struct WriteStringClosure {
|
|
PRUnichar *mWriteCursor;
|
|
bool mHasCarryoverByte;
|
|
char mCarryoverByte;
|
|
};
|
|
|
|
// there are a few cases we have to account for here:
|
|
// * even length buffer, no carryover - easy, just append
|
|
// * odd length buffer, no carryover - the last byte needs to be saved
|
|
// for carryover
|
|
// * odd length buffer, with carryover - first byte needs to be used
|
|
// with the carryover byte, and
|
|
// the rest of the even length
|
|
// buffer is appended as normal
|
|
// * even length buffer, with carryover - the first byte needs to be
|
|
// used with the previous carryover byte.
|
|
// this gives you an odd length buffer,
|
|
// so you have to save the last byte for
|
|
// the next carryover
|
|
|
|
|
|
// same version of the above, but with correct casting and endian swapping
|
|
static NS_METHOD
|
|
WriteSegmentToString(nsIInputStream* aStream,
|
|
void *aClosure,
|
|
const char* aFromSegment,
|
|
PRUint32 aToOffset,
|
|
PRUint32 aCount,
|
|
PRUint32 *aWriteCount)
|
|
{
|
|
NS_PRECONDITION(aCount > 0, "Why are we being told to write 0 bytes?");
|
|
NS_PRECONDITION(sizeof(PRUnichar) == 2, "We can't handle other sizes!");
|
|
|
|
WriteStringClosure* closure = static_cast<WriteStringClosure*>(aClosure);
|
|
PRUnichar *cursor = closure->mWriteCursor;
|
|
|
|
// we're always going to consume the whole buffer no matter what
|
|
// happens, so take care of that right now.. that allows us to
|
|
// tweak aCount later. Do NOT move this!
|
|
*aWriteCount = aCount;
|
|
|
|
// if the last Write had an odd-number of bytes read, then
|
|
if (closure->mHasCarryoverByte) {
|
|
// re-create the two-byte sequence we want to work with
|
|
char bytes[2] = { closure->mCarryoverByte, *aFromSegment };
|
|
*cursor = *(PRUnichar*)bytes;
|
|
// Now the little endianness dance
|
|
#ifdef IS_LITTLE_ENDIAN
|
|
*cursor = (PRUnichar) NS_SWAP16(*cursor);
|
|
#endif
|
|
++cursor;
|
|
|
|
// now skip past the first byte of the buffer.. code from here
|
|
// can assume normal operations, but should not assume aCount
|
|
// is relative to the ORIGINAL buffer
|
|
++aFromSegment;
|
|
--aCount;
|
|
|
|
closure->mHasCarryoverByte = false;
|
|
}
|
|
|
|
// this array is possibly unaligned... be careful how we access it!
|
|
const PRUnichar *unicodeSegment =
|
|
reinterpret_cast<const PRUnichar*>(aFromSegment);
|
|
|
|
// calculate number of full characters in segment (aCount could be odd!)
|
|
PRUint32 segmentLength = aCount / sizeof(PRUnichar);
|
|
|
|
// copy all data into our aligned buffer. byte swap if necessary.
|
|
memcpy(cursor, unicodeSegment, segmentLength * sizeof(PRUnichar));
|
|
PRUnichar *end = cursor + segmentLength;
|
|
#ifdef IS_LITTLE_ENDIAN
|
|
for (; cursor < end; ++cursor)
|
|
*cursor = (PRUnichar) NS_SWAP16(*cursor);
|
|
#endif
|
|
closure->mWriteCursor = end;
|
|
|
|
// remember this is the modifed aCount and aFromSegment,
|
|
// so that will take into account the fact that we might have
|
|
// skipped the first byte in the buffer
|
|
if (aCount % sizeof(PRUnichar) != 0) {
|
|
// we must have had a carryover byte, that we'll need the next
|
|
// time around
|
|
closure->mCarryoverByte = aFromSegment[aCount - 1];
|
|
closure->mHasCarryoverByte = true;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadString(nsAString& aString)
|
|
{
|
|
nsresult rv;
|
|
PRUint32 length, bytesRead;
|
|
|
|
rv = Read32(&length);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
if (length == 0) {
|
|
aString.Truncate();
|
|
return NS_OK;
|
|
}
|
|
|
|
// pre-allocate output buffer, and get direct access to buffer...
|
|
if (!EnsureStringLength(aString, length))
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
nsAString::iterator start;
|
|
aString.BeginWriting(start);
|
|
|
|
WriteStringClosure closure;
|
|
closure.mWriteCursor = start.get();
|
|
closure.mHasCarryoverByte = false;
|
|
|
|
rv = ReadSegments(WriteSegmentToString, &closure,
|
|
length*sizeof(PRUnichar), &bytesRead);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
NS_ASSERTION(!closure.mHasCarryoverByte, "some strange stream corruption!");
|
|
|
|
if (bytesRead != length*sizeof(PRUnichar))
|
|
return NS_ERROR_FAILURE;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadBytes(PRUint32 aLength, char* *_rval)
|
|
{
|
|
nsresult rv;
|
|
PRUint32 bytesRead;
|
|
char* s;
|
|
|
|
s = reinterpret_cast<char*>(moz_malloc(aLength));
|
|
if (!s)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
rv = Read(s, aLength, &bytesRead);
|
|
if (NS_FAILED(rv)) {
|
|
moz_free(s);
|
|
return rv;
|
|
}
|
|
if (bytesRead != aLength) {
|
|
moz_free(s);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
*_rval = s;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadByteArray(PRUint32 aLength, PRUint8* *_rval)
|
|
{
|
|
return ReadBytes(aLength, reinterpret_cast<char **>(_rval));
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadObject(bool aIsStrongRef, nsISupports* *aObject)
|
|
{
|
|
nsCID cid;
|
|
nsIID iid;
|
|
nsresult rv = ReadID(&cid);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = ReadID(&iid);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// HACK: Intercept old (pre-gecko6) nsIURI IID, and replace with
|
|
// the updated IID, so that we're QI'ing to an actual interface.
|
|
// (As soon as we drop support for upgrading from pre-gecko6, we can
|
|
// remove this chunk.)
|
|
static const nsIID oldURIiid =
|
|
{ 0x7a22cc0, 0xce5, 0x11d3,
|
|
{ 0x93, 0x31, 0x0, 0x10, 0x4b, 0xa0, 0xfd, 0x40 }};
|
|
|
|
// hackaround for bug 670542
|
|
static const nsIID oldURIiid2 =
|
|
{ 0xd6d04c36, 0x0fa4, 0x4db3,
|
|
{ 0xbe, 0x05, 0x4a, 0x18, 0x39, 0x71, 0x03, 0xe2 }};
|
|
|
|
// hackaround for bug 682031
|
|
static const nsIID oldURIiid3 =
|
|
{ 0x12120b20, 0x0929, 0x40e9,
|
|
{ 0x88, 0xcf, 0x6e, 0x08, 0x76, 0x6e, 0x8b, 0x23 }};
|
|
|
|
if (iid.Equals(oldURIiid) ||
|
|
iid.Equals(oldURIiid2) ||
|
|
iid.Equals(oldURIiid3)) {
|
|
const nsIID newURIiid = NS_IURI_IID;
|
|
iid = newURIiid;
|
|
}
|
|
// END HACK
|
|
|
|
nsCOMPtr<nsISupports> object = do_CreateInstance(cid, &rv);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsISerializable> serializable = do_QueryInterface(object);
|
|
NS_ENSURE_TRUE(serializable, NS_ERROR_UNEXPECTED);
|
|
|
|
rv = serializable->Read(this);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return object->QueryInterface(iid, reinterpret_cast<void**>(aObject));
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBinaryInputStream::ReadID(nsID *aResult)
|
|
{
|
|
nsresult rv = Read32(&aResult->m0);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = Read16(&aResult->m1);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = Read16(&aResult->m2);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
for (int i = 0; i < 8; ++i) {
|
|
rv = Read8(&aResult->m3[i]);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP_(char*)
|
|
nsBinaryInputStream::GetBuffer(PRUint32 aLength, PRUint32 aAlignMask)
|
|
{
|
|
if (mBufferAccess)
|
|
return mBufferAccess->GetBuffer(aLength, aAlignMask);
|
|
return nsnull;
|
|
}
|
|
|
|
NS_IMETHODIMP_(void)
|
|
nsBinaryInputStream::PutBuffer(char* aBuffer, PRUint32 aLength)
|
|
{
|
|
if (mBufferAccess)
|
|
mBufferAccess->PutBuffer(aBuffer, aLength);
|
|
}
|