mirror of
https://github.com/mozilla/gecko-dev.git
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575 lines
14 KiB
C++
575 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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*/
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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 "nsMemory.h"
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#include "prlong.h"
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nsBinaryOutputStream::nsBinaryOutputStream(nsIOutputStream* aStream)
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: mOutputStream(aStream),
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mBufferAccess(do_QueryInterface(aStream))
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{
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NS_INIT_REFCNT();
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}
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NS_IMPL_ISUPPORTS1(nsBinaryOutputStream, nsIBinaryOutputStream)
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NS_IMETHODIMP
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nsBinaryOutputStream::Flush() { return mOutputStream->Flush(); }
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NS_IMETHODIMP
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nsBinaryOutputStream::Close() { return mOutputStream->Close(); }
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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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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::GetNonBlocking(PRBool *aNonBlocking)
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{
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NS_NOTREACHED("GetNonBlocking");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::SetNonBlocking(PRBool aNonBlocking)
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{
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NS_NOTREACHED("SetNonBlocking");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::GetObserver(nsIOutputStreamObserver * *aObserver)
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{
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NS_NOTREACHED("GetObserver");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::SetObserver(nsIOutputStreamObserver * aObserver)
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{
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NS_NOTREACHED("SetObserver");
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return NS_ERROR_NOT_IMPLEMENTED;
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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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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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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryOutputStream::WriteBoolean(PRBool 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(NS_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(*NS_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(*NS_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(NS_REINTERPRET_CAST(const char*, aString), byteCount);
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#else
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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 = NS_REINTERPRET_CAST(PRUnichar*, nsMemory::Alloc(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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for (PRUint32 i = 0; i < length; i++)
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copy[i] = NS_SWAP16(aString[i]);
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rv = WriteBytes(NS_REINTERPRET_CAST(const char*, copy), byteCount);
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if (copy != temp)
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nsMemory::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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NS_NOTREACHED("WriteUtf8Z");
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return NS_ERROR_NOT_IMPLEMENTED;
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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::WriteObject(nsISupports* aObject, PRBool aIsStrongRef)
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{
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NS_NOTREACHED("WriteObject");
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return NS_ERROR_NOT_IMPLEMENTED;
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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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NS_NOTREACHED("WriteSingleRefObject");
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return NS_ERROR_NOT_IMPLEMENTED;
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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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PRBool aIsStrongRef)
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{
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NS_NOTREACHED("WriteCompoundObject");
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return NS_ERROR_NOT_IMPLEMENTED;
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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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NS_NOTREACHED("WriteID");
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return NS_ERROR_NOT_IMPLEMENTED;
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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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nsBinaryInputStream::nsBinaryInputStream(nsIInputStream* aStream)
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: mInputStream(aStream),
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mBufferAccess(do_QueryInterface(aStream))
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{
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NS_INIT_REFCNT();
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}
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NS_IMPL_ISUPPORTS1(nsBinaryInputStream, nsIBinaryInputStream)
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NS_IMETHODIMP
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nsBinaryInputStream::Available(PRUint32* aResult)
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{
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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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return mInputStream->Read(aBuffer, aCount, aNumRead);
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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_NOTREACHED("ReadSegments");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::GetNonBlocking(PRBool *aNonBlocking)
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{
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NS_NOTREACHED("GetNonBlocking");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::GetObserver(nsIInputStreamObserver * *aObserver)
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{
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NS_NOTREACHED("GetObserver");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::SetObserver(nsIInputStreamObserver * aObserver)
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{
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NS_NOTREACHED("SetObserver");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::Close() { return mInputStream->Close(); }
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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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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadBoolean(PRBool* aBoolean)
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{
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PRUint8 byteResult;
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nsresult rv = Read8(&byteResult);
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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(NS_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(NS_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(NS_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(NS_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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{
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NS_ASSERTION(sizeof(float) == sizeof (PRUint32),
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"False assumption about sizeof(float)");
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return Read32(NS_REINTERPRET_CAST(PRUint32*, aFloat));
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadDouble(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 Read64(NS_REINTERPRET_CAST(PRUint64*, aDouble));
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadStringZ(char* *aString)
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{
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nsresult rv;
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PRUint32 length, bytesRead;
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char *s;
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rv = Read32(&length);
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if (NS_FAILED(rv)) return rv;
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s = NS_REINTERPRET_CAST(char*, nsMemory::Alloc(length + 1));
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if (!s)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = Read(s, length, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != length) {
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nsMemory::Free(s);
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return NS_ERROR_FAILURE;
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}
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s[length] = '\0';
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*aString = s;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadWStringZ(PRUnichar* *aString)
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{
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nsresult rv;
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PRUint32 length, byteCount, bytesRead;
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PRUnichar *ws;
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rv = Read32(&length);
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if (NS_FAILED(rv)) return rv;
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byteCount = length * sizeof(PRUnichar);
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ws = NS_REINTERPRET_CAST(PRUnichar*,
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nsMemory::Alloc(byteCount + sizeof(PRUnichar)));
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if (!ws)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = Read(NS_REINTERPRET_CAST(char*, ws), byteCount, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != byteCount) {
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nsMemory::Free(ws);
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return NS_ERROR_FAILURE;
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}
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#ifdef IS_LITTLE_ENDIAN
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for (PRUint32 i = 0; i < length; i++)
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ws[i] = NS_SWAP16(ws[i]);
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#endif
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ws[length] = 0;
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*aString = ws;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadUtf8Z(PRUnichar* *aString)
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{
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NS_NOTREACHED("ReadUtf8Z");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadBytes(char* *aString, PRUint32 aLength)
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{
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nsresult rv;
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PRUint32 bytesRead;
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char* s;
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s = NS_REINTERPRET_CAST(char*, nsMemory::Alloc(aLength));
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if (!s)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = Read(s, aLength, &bytesRead);
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if (NS_FAILED(rv)) return rv;
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if (bytesRead != aLength) {
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nsMemory::Free(s);
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return NS_ERROR_FAILURE;
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}
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*aString = s;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadObject(PRBool aIsStrongRef, nsISupports* *aObject)
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{
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NS_NOTREACHED("ReadObject");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsBinaryInputStream::ReadID(nsID *aResult)
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{
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NS_NOTREACHED("ReadID");
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP_(char*)
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nsBinaryInputStream::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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nsBinaryInputStream::PutBuffer(char* aBuffer, PRUint32 aLength)
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{
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if (mBufferAccess)
|
|
mBufferAccess->PutBuffer(aBuffer, aLength);
|
|
}
|
|
|
|
NS_COM nsresult
|
|
NS_NewBinaryOutputStream(nsIBinaryOutputStream* *aResult, nsIOutputStream* aDestStream)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aResult);
|
|
nsIBinaryOutputStream *stream = new nsBinaryOutputStream(aDestStream);
|
|
if (!stream)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(stream);
|
|
*aResult = stream;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_COM nsresult
|
|
NS_NewBinaryInputStream(nsIBinaryInputStream* *aResult, nsIInputStream* aSrcStream)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aResult);
|
|
nsIBinaryInputStream *stream = new nsBinaryInputStream(aSrcStream);
|
|
if (!stream)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(stream);
|
|
*aResult = stream;
|
|
return NS_OK;
|
|
}
|