mirror of
https://github.com/mozilla/gecko-dev.git
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711 lines
22 KiB
C++
711 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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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.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "pratom.h"
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#include "nsIComponentManager.h"
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#include "nsICharRepresentable.h"
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#include "nsUCvKOSupport.h"
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#include "nsUCvKODll.h"
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#define DEFAULT_BUFFER_CAPACITY 16
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// XXX review the buffer growth limitation code
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//----------------------------------------------------------------------
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// Class nsBasicDecoderSupport [implementation]
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nsBasicDecoderSupport::nsBasicDecoderSupport()
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{
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NS_INIT_REFCNT();
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PR_AtomicIncrement(&g_InstanceCount);
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}
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nsBasicDecoderSupport::~nsBasicDecoderSupport()
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{
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PR_AtomicDecrement(&g_InstanceCount);
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}
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//----------------------------------------------------------------------
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// Interface nsISupports [implementation]
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NS_IMPL_ADDREF(nsBasicDecoderSupport);
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NS_IMPL_RELEASE(nsBasicDecoderSupport);
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nsresult nsBasicDecoderSupport::QueryInterface(REFNSIID aIID,
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void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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*aInstancePtr = NULL;
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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if (aIID.Equals(NS_GET_IID(nsIUnicodeDecoder))) {
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*aInstancePtr = (void*) ((nsIUnicodeDecoder*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kISupportsIID)) {
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*aInstancePtr = (void*) ((nsISupports*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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//----------------------------------------------------------------------
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// Interface nsIUnicodeDecoder [implementation]
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//----------------------------------------------------------------------
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// Class nsBufferDecoderSupport [implementation]
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nsBufferDecoderSupport::nsBufferDecoderSupport()
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: nsBasicDecoderSupport()
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{
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mBufferCapacity = DEFAULT_BUFFER_CAPACITY;
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mBuffer = new char[mBufferCapacity];
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Reset();
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}
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nsBufferDecoderSupport::~nsBufferDecoderSupport()
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{
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delete [] mBuffer;
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}
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void nsBufferDecoderSupport::FillBuffer(const char ** aSrc, PRInt32 aSrcLength)
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{
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PRInt32 bcr = PR_MIN(mBufferCapacity - mBufferLength, aSrcLength);
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memcpy(mBuffer + mBufferLength, *aSrc, bcr);
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mBufferLength += bcr;
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(*aSrc) += bcr;
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}
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void nsBufferDecoderSupport::DoubleBuffer()
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{
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mBufferCapacity *= 2;
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char * newBuffer = new char [mBufferCapacity];
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if (mBufferLength > 0) memcpy(newBuffer, mBuffer, mBufferLength);
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delete [] mBuffer;
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mBuffer = newBuffer;
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}
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//----------------------------------------------------------------------
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// Subclassing of nsBasicDecoderSupport class [implementation]
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NS_IMETHODIMP nsBufferDecoderSupport::Convert(const char * aSrc,
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PRInt32 * aSrcLength,
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PRUnichar * aDest,
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PRInt32 * aDestLength)
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{
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// we do all operations using pointers internally
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const char * src = aSrc;
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const char * srcEnd = aSrc + *aSrcLength;
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PRUnichar * dest = aDest;
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PRUnichar * destEnd = aDest + *aDestLength;
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PRInt32 bcr, bcw; // byte counts for read & write;
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nsresult res = NS_OK;
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// do we have some residual data from the last conversion?
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if (mBufferLength > 0) if (dest == destEnd) {
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res = NS_OK_UDEC_MOREOUTPUT;
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} else for (;;) {
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// we need new data to add to the buffer
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if (src == srcEnd) {
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res = NS_OK_UDEC_MOREINPUT;
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break;
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}
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// fill that buffer
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PRInt32 buffLen = mBufferLength; // initial buffer length
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FillBuffer(&src, srcEnd - src);
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// convert that buffer
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bcr = mBufferLength;
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bcw = destEnd - dest;
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res = ConvertNoBuff(mBuffer, &bcr, dest, &bcw);
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dest += bcw;
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if ((res == NS_OK_UDEC_MOREINPUT) && (bcw == 0)) {
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res = NS_ERROR_UNEXPECTED;
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break;
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} else {
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if (bcr < buffLen) {
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// we didn't convert that residual data - unfill the buffer
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src -= mBufferLength - buffLen;
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mBufferLength = buffLen;
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} else {
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// the buffer and some extra data was converted - unget the rest
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src -= mBufferLength - bcr;
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mBufferLength = 0;
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}
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break;
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}
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}
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if (res == NS_OK) {
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bcr = srcEnd - src;
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bcw = destEnd - dest;
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res = ConvertNoBuff(src, &bcr, dest, &bcw);
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src += bcr;
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dest += bcw;
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// if we have partial input, store it in our internal buffer.
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if (res == NS_OK_UDEC_MOREINPUT) {
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bcr = srcEnd - src;
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// make sure buffer is large enough
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if (bcr > mBufferCapacity) {
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// somehow we got into an error state and the buffer is growing out of control
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res = NS_ERROR_UNEXPECTED;
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} else {
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FillBuffer(&src, bcr);
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}
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}
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}
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*aSrcLength -= srcEnd - src;
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*aDestLength -= destEnd - dest;
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return res;
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}
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NS_IMETHODIMP nsBufferDecoderSupport::Reset()
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{
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mBufferLength = 0;
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return NS_OK;
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}
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//----------------------------------------------------------------------
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// Class nsTableDecoderSupport [implementation]
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nsTableDecoderSupport::nsTableDecoderSupport(uShiftTable * aShiftTable,
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uMappingTable * aMappingTable)
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: nsBufferDecoderSupport()
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{
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mHelper = NULL;
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mShiftTable = aShiftTable;
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mMappingTable = aMappingTable;
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}
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nsTableDecoderSupport::~nsTableDecoderSupport()
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{
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NS_IF_RELEASE(mHelper);
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}
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//----------------------------------------------------------------------
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// Subclassing of nsBufferDecoderSupport class [implementation]
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NS_IMETHODIMP nsTableDecoderSupport::ConvertNoBuff(const char * aSrc,
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PRInt32 * aSrcLength,
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PRUnichar * aDest,
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PRInt32 * aDestLength)
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{
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nsresult res;
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if (mHelper == nsnull) {
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res = nsComponentManager::CreateInstance(kUnicodeDecodeHelperCID, NULL,
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kIUnicodeDecodeHelperIID, (void**) & mHelper);
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if (NS_FAILED(res)) return NS_ERROR_UDEC_NOHELPER;
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}
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res = mHelper->ConvertByTable(aSrc, aSrcLength, aDest, aDestLength,
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mShiftTable, mMappingTable);
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return res;
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}
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//----------------------------------------------------------------------
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// Class nsMultiTableDecoderSupport [implementation]
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nsMultiTableDecoderSupport::nsMultiTableDecoderSupport(
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PRInt32 aTableCount,
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uRange * aRangeArray,
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uShiftTable ** aShiftTable,
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uMappingTable ** aMappingTable)
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: nsBufferDecoderSupport()
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{
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mHelper = NULL;
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mTableCount = aTableCount;
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mRangeArray = aRangeArray;
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mShiftTable = aShiftTable;
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mMappingTable = aMappingTable;
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}
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nsMultiTableDecoderSupport::~nsMultiTableDecoderSupport()
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{
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NS_IF_RELEASE(mHelper);
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}
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//----------------------------------------------------------------------
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// Subclassing of nsBufferDecoderSupport class [implementation]
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NS_IMETHODIMP nsMultiTableDecoderSupport::ConvertNoBuff(const char * aSrc,
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PRInt32 * aSrcLength,
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PRUnichar * aDest,
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PRInt32 * aDestLength)
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{
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nsresult res;
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if (mHelper == nsnull) {
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res = nsComponentManager::CreateInstance(kUnicodeDecodeHelperCID, NULL,
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kIUnicodeDecodeHelperIID, (void**) &mHelper);
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if (NS_FAILED(res)) return NS_ERROR_UDEC_NOHELPER;
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}
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res = mHelper->ConvertByMultiTable(aSrc, aSrcLength, aDest, aDestLength,
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mTableCount, mRangeArray, mShiftTable, mMappingTable);
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return res;
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}
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//----------------------------------------------------------------------
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// Class nsOneByteDecoderSupport [implementation]
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nsOneByteDecoderSupport::nsOneByteDecoderSupport(
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uShiftTable * aShiftTable,
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uMappingTable * aMappingTable)
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: nsBasicDecoderSupport()
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{
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mHelper = NULL;
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mShiftTable = aShiftTable;
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mMappingTable = aMappingTable;
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}
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nsOneByteDecoderSupport::~nsOneByteDecoderSupport()
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{
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NS_IF_RELEASE(mHelper);
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}
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//----------------------------------------------------------------------
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// Subclassing of nsBasicDecoderSupport class [implementation]
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NS_IMETHODIMP nsOneByteDecoderSupport::Convert(const char * aSrc,
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PRInt32 * aSrcLength,
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PRUnichar * aDest,
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PRInt32 * aDestLength)
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{
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nsresult res;
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if (mHelper == nsnull) {
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res = nsComponentManager::CreateInstance(kUnicodeDecodeHelperCID, NULL,
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kIUnicodeDecodeHelperIID, (void**) &mHelper);
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if (NS_FAILED(res)) return NS_ERROR_UDEC_NOHELPER;
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res = mHelper -> CreateFastTable(mShiftTable, mMappingTable, mFastTable,
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ONE_BYTE_TABLE_SIZE);
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if (NS_FAILED(res)) return res;
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}
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res = mHelper->ConvertByFastTable(aSrc, aSrcLength, aDest, aDestLength,
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mFastTable, ONE_BYTE_TABLE_SIZE);
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return res;
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}
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NS_IMETHODIMP nsOneByteDecoderSupport::GetMaxLength(const char * aSrc,
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PRInt32 aSrcLength,
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PRInt32 * aDestLength)
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{
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// single byte to Unicode converter
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*aDestLength = aSrcLength;
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return NS_OK_UDEC_EXACTLENGTH;
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}
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NS_IMETHODIMP nsOneByteDecoderSupport::Reset()
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{
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// nothing to reset, no internal state in this case
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return NS_OK;
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}
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//----------------------------------------------------------------------
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// Class nsBasicEncoder [implementation]
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nsBasicEncoder::nsBasicEncoder()
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{
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NS_INIT_REFCNT();
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PR_AtomicIncrement(&g_InstanceCount);
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}
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nsBasicEncoder::~nsBasicEncoder()
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{
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PR_AtomicDecrement(&g_InstanceCount);
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}
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//----------------------------------------------------------------------
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// Interface nsISupports [implementation]
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NS_IMPL_ADDREF(nsBasicEncoder);
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NS_IMPL_RELEASE(nsBasicEncoder);
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nsresult nsBasicEncoder::QueryInterface(REFNSIID aIID,
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void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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*aInstancePtr = NULL;
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);
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if (aIID.Equals(kIUnicodeEncoderIID)) {
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*aInstancePtr = (void*) ((nsIUnicodeEncoder*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(NS_GET_IID(nsICharRepresentable))) {
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*aInstancePtr = (void*) ((nsICharRepresentable*)this);
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kISupportsIID)) {
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*aInstancePtr = (void*) ((nsISupports*)((nsIUnicodeEncoder*)this));
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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//----------------------------------------------------------------------
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// Class nsEncoderSupport [implementation]
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nsEncoderSupport::nsEncoderSupport()
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{
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mBufferCapacity = DEFAULT_BUFFER_CAPACITY;
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mBuffer = new char[mBufferCapacity];
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mErrBehavior = kOnError_Signal;
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mErrChar = 0;
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mErrEncoder = NULL;
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Reset();
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}
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nsEncoderSupport::~nsEncoderSupport()
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{
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delete [] mBuffer;
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NS_IF_RELEASE(mErrEncoder);
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}
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NS_IMETHODIMP nsEncoderSupport::ConvertNoBuff(const PRUnichar * aSrc,
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PRInt32 * aSrcLength,
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char * aDest,
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PRInt32 * aDestLength)
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{
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// we do all operations using pointers internally
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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char * destEnd = aDest + *aDestLength;
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PRInt32 bcr, bcw; // byte counts for read & write;
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nsresult res;
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for (;;) {
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bcr = srcEnd - src;
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bcw = destEnd - dest;
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res = ConvertNoBuffNoErr(src, &bcr, dest, &bcw);
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src += bcr;
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dest += bcw;
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if (res == NS_ERROR_UENC_NOMAPPING) {
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if (mErrBehavior == kOnError_Replace) {
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const PRUnichar buff[] = {mErrChar};
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bcr = 1;
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bcw = destEnd - dest;
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src--; // back the input: maybe the guy won't consume consume anything.
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res = ConvertNoBuffNoErr(buff, &bcr, dest, &bcw);
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src += bcr;
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dest += bcw;
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if (res != NS_OK) break;
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} else if (mErrBehavior == kOnError_CallBack) {
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bcw = destEnd - dest;
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src--;
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res = mErrEncoder->Convert(*src, dest, &bcw);
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dest += bcw;
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// if enought output space then the last char was used
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if (res != NS_OK_UENC_MOREOUTPUT) src++;
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if (res != NS_OK) break;
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} else break;
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}
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else break;
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}
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*aSrcLength -= srcEnd - src;
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*aDestLength -= destEnd - dest;
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return res;
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}
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NS_IMETHODIMP nsEncoderSupport::FinishNoBuff(char * aDest,
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PRInt32 * aDestLength)
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{
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*aDestLength = 0;
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return NS_OK;
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}
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nsresult nsEncoderSupport::FlushBuffer(char ** aDest, const char * aDestEnd)
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{
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PRInt32 bcr, bcw; // byte counts for read & write;
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nsresult res = NS_OK;
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char * dest = *aDest;
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if (mBufferStart < mBufferEnd) {
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bcr = mBufferEnd - mBufferStart;
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bcw = aDestEnd - dest;
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if (bcw < bcr) bcr = bcw;
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memcpy(dest, mBufferStart, bcr);
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dest += bcr;
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mBufferStart += bcr;
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if (mBufferStart < mBufferEnd) res = NS_OK_UENC_MOREOUTPUT;
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}
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*aDest = dest;
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return res;
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}
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//----------------------------------------------------------------------
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// Interface nsIUnicodeEncoder [implementation]
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NS_IMETHODIMP nsEncoderSupport::Convert(const PRUnichar * aSrc,
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PRInt32 * aSrcLength,
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char * aDest,
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PRInt32 * aDestLength)
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{
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// we do all operations using pointers internally
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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char * destEnd = aDest + *aDestLength;
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PRInt32 bcr, bcw; // byte counts for read & write;
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nsresult res;
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res = FlushBuffer(&dest, destEnd);
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if (res == NS_OK_UENC_MOREOUTPUT) goto final;
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bcr = srcEnd - src;
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bcw = destEnd - dest;
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res = ConvertNoBuff(src, &bcr, dest, &bcw);
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src += bcr;
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dest += bcw;
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if ((res == NS_OK_UENC_MOREOUTPUT) && (dest < destEnd)) {
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// convert exactly one character into the internal buffer
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// at this point, there should be at least a char in the input
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for (;;) {
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bcr = 1;
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bcw = mBufferCapacity;
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res = ConvertNoBuff(src, &bcr, mBuffer, &bcw);
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if (res == NS_OK_UENC_MOREOUTPUT) {
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delete [] mBuffer;
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mBufferCapacity *= 2;
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mBuffer = new char [mBufferCapacity];
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} else {
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src += bcr;
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mBufferStart = mBufferEnd = mBuffer;
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mBufferEnd += bcw;
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break;
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}
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}
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res = FlushBuffer(&dest, destEnd);
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}
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final:
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*aSrcLength -= srcEnd - src;
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*aDestLength -= destEnd - dest;
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return res;
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}
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NS_IMETHODIMP nsEncoderSupport::Finish(char * aDest, PRInt32 * aDestLength)
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{
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// we do all operations using pointers internally
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char * dest = aDest;
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char * destEnd = aDest + *aDestLength;
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PRInt32 bcw; // byte count for write;
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nsresult res;
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res = FlushBuffer(&dest, destEnd);
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if (res == NS_OK_UENC_MOREOUTPUT) goto final;
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// do the finish into the internal buffer.
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for (;;) {
|
|
bcw = mBufferCapacity;
|
|
res = FinishNoBuff(mBuffer, &bcw);
|
|
|
|
if (res == NS_OK_UENC_MOREOUTPUT) {
|
|
delete [] mBuffer;
|
|
mBufferCapacity *= 2;
|
|
mBuffer = new char [mBufferCapacity];
|
|
} else {
|
|
mBufferStart = mBufferEnd = mBuffer;
|
|
mBufferEnd += bcw;
|
|
break;
|
|
}
|
|
}
|
|
|
|
res = FlushBuffer(&dest, destEnd);
|
|
|
|
final:
|
|
*aDestLength -= destEnd - dest;
|
|
return res;
|
|
}
|
|
|
|
NS_IMETHODIMP nsEncoderSupport::Reset()
|
|
{
|
|
mBufferStart = mBufferEnd = mBuffer;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsEncoderSupport::SetOutputErrorBehavior(
|
|
PRInt32 aBehavior,
|
|
nsIUnicharEncoder * aEncoder,
|
|
PRUnichar aChar)
|
|
{
|
|
if ((aBehavior == kOnError_CallBack) && (aEncoder == NULL))
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
NS_IF_RELEASE(aEncoder);
|
|
mErrEncoder = aEncoder;
|
|
NS_IF_ADDREF(aEncoder);
|
|
|
|
mErrBehavior = aBehavior;
|
|
mErrChar = aChar;
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Class nsTableEncoderSupport [implementation]
|
|
|
|
nsTableEncoderSupport::nsTableEncoderSupport(uShiftTable * aShiftTable,
|
|
uMappingTable * aMappingTable)
|
|
: nsEncoderSupport()
|
|
{
|
|
mHelper = NULL;
|
|
mShiftTable = aShiftTable;
|
|
mMappingTable = aMappingTable;
|
|
}
|
|
|
|
nsTableEncoderSupport::~nsTableEncoderSupport()
|
|
{
|
|
NS_IF_RELEASE(mHelper);
|
|
}
|
|
|
|
NS_IMETHODIMP nsTableEncoderSupport::FillInfo(PRUint32 *aInfo)
|
|
{
|
|
nsresult res;
|
|
|
|
if (mHelper == nsnull) {
|
|
res = nsComponentManager::CreateInstance(kUnicodeEncodeHelperCID, NULL,
|
|
kIUnicodeEncodeHelperIID, (void**) & mHelper);
|
|
|
|
if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
|
|
}
|
|
|
|
res = mHelper->FillInfo(aInfo, mMappingTable);
|
|
return res;
|
|
}
|
|
//----------------------------------------------------------------------
|
|
// Subclassing of nsEncoderSupport class [implementation]
|
|
|
|
NS_IMETHODIMP nsTableEncoderSupport::ConvertNoBuffNoErr(
|
|
const PRUnichar * aSrc,
|
|
PRInt32 * aSrcLength,
|
|
char * aDest,
|
|
PRInt32 * aDestLength)
|
|
{
|
|
nsresult res;
|
|
|
|
if (mHelper == nsnull) {
|
|
res = nsComponentManager::CreateInstance(kUnicodeEncodeHelperCID, NULL,
|
|
kIUnicodeEncodeHelperIID, (void**) & mHelper);
|
|
|
|
if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
|
|
}
|
|
|
|
res = mHelper->ConvertByTable(aSrc, aSrcLength, aDest, aDestLength,
|
|
mShiftTable, mMappingTable);
|
|
return res;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Class nsMultiTableEncoderSupport [implementation]
|
|
|
|
nsMultiTableEncoderSupport::nsMultiTableEncoderSupport(
|
|
PRInt32 aTableCount,
|
|
uShiftTable ** aShiftTable,
|
|
uMappingTable ** aMappingTable)
|
|
: nsEncoderSupport()
|
|
{
|
|
mHelper = NULL;
|
|
mTableCount = aTableCount;
|
|
mShiftTable = aShiftTable;
|
|
mMappingTable = aMappingTable;
|
|
}
|
|
|
|
nsMultiTableEncoderSupport::~nsMultiTableEncoderSupport()
|
|
{
|
|
NS_IF_RELEASE(mHelper);
|
|
}
|
|
|
|
NS_IMETHODIMP nsMultiTableEncoderSupport::FillInfo(PRUint32 *aInfo)
|
|
{
|
|
nsresult res;
|
|
|
|
if (mHelper == nsnull) {
|
|
res = nsComponentManager::CreateInstance(kUnicodeEncodeHelperCID, NULL,
|
|
kIUnicodeEncodeHelperIID, (void**) & mHelper);
|
|
|
|
if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
|
|
}
|
|
|
|
res = mHelper->FillInfo(aInfo,mTableCount, mMappingTable);
|
|
return res;
|
|
}
|
|
//----------------------------------------------------------------------
|
|
// Subclassing of nsEncoderSupport class [implementation]
|
|
|
|
NS_IMETHODIMP nsMultiTableEncoderSupport::ConvertNoBuffNoErr(
|
|
const PRUnichar * aSrc,
|
|
PRInt32 * aSrcLength,
|
|
char * aDest,
|
|
PRInt32 * aDestLength)
|
|
{
|
|
nsresult res;
|
|
|
|
if (mHelper == nsnull) {
|
|
res = nsComponentManager::CreateInstance(kUnicodeEncodeHelperCID, NULL,
|
|
kIUnicodeEncodeHelperIID, (void**) & mHelper);
|
|
|
|
if (NS_FAILED(res)) return NS_ERROR_UENC_NOHELPER;
|
|
}
|
|
|
|
res = mHelper->ConvertByMultiTable(aSrc, aSrcLength, aDest, aDestLength,
|
|
mTableCount, mShiftTable, mMappingTable);
|
|
return res;
|
|
}
|