gecko-dev/intl/uconv/ucvibm/nsUCvIBMSupport.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* IBM Corporation
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 1999
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 12/09/1999 IBM Corp. Support for IBM codepages - 850,852,855,857,862,864
*
*/
#ifndef nsUCvIBMSupport_h___
#define nsUCvIBMSupport_h___
#include "nsIUnicodeEncoder.h"
#include "nsIUnicodeDecoder.h"
#include "nsIUnicodeEncodeHelper.h"
#include "nsIUnicodeDecodeHelper.h"
#include "nsICharRepresentable.h"
#define ONE_BYTE_TABLE_SIZE 256
//----------------------------------------------------------------------
// Class nsBasicDecoderSupport [declaration]
/**
* Support class for the Unicode decoders.
*
* The class source files for this class are in /ucvibm/nsUCvIBMSupport.
* However, because these objects requires non-xpcom subclassing, local copies
* will be made into the other directories using them. Just don't forget to
* keep in sync with the master copy!
*
* This class implements:
* - nsISupports
* - nsIUnicodeDecoder
*
* @created 19/Apr/1999
* @author Catalin Rotaru [CATA]
*/
class nsBasicDecoderSupport : public nsIUnicodeDecoder
{
NS_DECL_ISUPPORTS
public:
/**
* Class constructor.
*/
nsBasicDecoderSupport();
/**
* Class destructor.
*/
virtual ~nsBasicDecoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeDecoder [declaration]
};
//----------------------------------------------------------------------
// Class nsBufferDecoderSupport [declaration]
/**
* Support class for the Unicode decoders.
*
* This class implements:
* - the buffer management
*
* @created 15/Mar/1999
* @author Catalin Rotaru [CATA]
*/
class nsBufferDecoderSupport : public nsBasicDecoderSupport
{
protected:
/**
* Internal buffer for partial conversions.
*/
char * mBuffer;
PRInt32 mBufferCapacity;
PRInt32 mBufferLength;
/**
* Convert method but *without* the buffer management stuff.
*/
NS_IMETHOD ConvertNoBuff(const char * aSrc, PRInt32 * aSrcLength,
PRUnichar * aDest, PRInt32 * aDestLength) = 0;
void FillBuffer(const char ** aSrc, PRInt32 aSrcLength);
void DoubleBuffer();
public:
/**
* Class constructor.
*/
nsBufferDecoderSupport();
/**
* Class destructor.
*/
virtual ~nsBufferDecoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeDecoder [declaration]
NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
PRUnichar * aDest, PRInt32 * aDestLength);
NS_IMETHOD Reset();
};
//----------------------------------------------------------------------
// Class nsTableDecoderSupport [declaration]
/**
* Support class for a single-table-driven Unicode decoder.
*
* @created 15/Mar/1999
* @author Catalin Rotaru [CATA]
*/
class nsTableDecoderSupport : public nsBufferDecoderSupport
{
public:
/**
* Class constructor.
*/
nsTableDecoderSupport(uShiftTable * aShiftTable,
uMappingTable * aMappingTable);
/**
* Class destructor.
*/
virtual ~nsTableDecoderSupport();
protected:
nsIUnicodeDecodeHelper * mHelper; // decoder helper object
uShiftTable * mShiftTable;
uMappingTable * mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsBufferDecoderSupport class [declaration]
NS_IMETHOD ConvertNoBuff(const char * aSrc, PRInt32 * aSrcLength,
PRUnichar * aDest, PRInt32 * aDestLength);
};
//----------------------------------------------------------------------
// Class nsMultiTableDecoderSupport [declaration]
/**
* Support class for a multi-table-driven Unicode decoder.
*
* @created 24/Mar/1999
* @author Catalin Rotaru [CATA]
*/
class nsMultiTableDecoderSupport : public nsBufferDecoderSupport
{
public:
/**
* Class constructor.
*/
nsMultiTableDecoderSupport(PRInt32 aTableCount, uRange * aRangeArray,
uShiftTable ** aShiftTable, uMappingTable ** aMappingTable);
/**
* Class destructor.
*/
virtual ~nsMultiTableDecoderSupport();
protected:
nsIUnicodeDecodeHelper * mHelper; // decoder helper object
PRInt32 mTableCount;
uRange * mRangeArray;
uShiftTable ** mShiftTable;
uMappingTable ** mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsBufferDecoderSupport class [declaration]
NS_IMETHOD ConvertNoBuff(const char * aSrc, PRInt32 * aSrcLength,
PRUnichar * aDest, PRInt32 * aDestLength);
};
//----------------------------------------------------------------------
// Class nsBufferDecoderSupport [declaration]
/**
* Support class for a single-byte Unicode decoder.
*
* @created 19/Apr/1999
* @author Catalin Rotaru [CATA]
*/
class nsOneByteDecoderSupport : public nsBasicDecoderSupport
{
public:
/**
* Class constructor.
*/
nsOneByteDecoderSupport(uShiftTable * aShiftTable,
uMappingTable * aMappingTable);
/**
* Class destructor.
*/
virtual ~nsOneByteDecoderSupport();
protected:
nsIUnicodeDecodeHelper * mHelper; // decoder helper object
uShiftTable * mShiftTable;
uMappingTable * mMappingTable;
PRUnichar mFastTable[ONE_BYTE_TABLE_SIZE];
//--------------------------------------------------------------------
// Subclassing of nsBasicDecoderSupport class [declaration]
NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
PRUnichar * aDest, PRInt32 * aDestLength);
NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength,
PRInt32 * aDestLength);
NS_IMETHOD Reset();
};
//----------------------------------------------------------------------
// Class nsBasicEncoder [declaration]
class nsBasicEncoder : public nsIUnicodeEncoder, public nsICharRepresentable
{
NS_DECL_ISUPPORTS
public:
/**
* Class constructor.
*/
nsBasicEncoder();
/**
* Class destructor.
*/
virtual ~nsBasicEncoder();
};
//----------------------------------------------------------------------
// Class nsEncoderSupport [declaration]
/**
* Support class for the Unicode encoders.
*
* This class implements:
* - nsISupports
* - the buffer management
* - error handling procedure(s)
*
* @created 17/Feb/1999
* @author Catalin Rotaru [CATA]
*/
class nsEncoderSupport : public nsBasicEncoder
{
protected:
/**
* Internal buffer for partial conversions.
*/
char * mBuffer;
PRInt32 mBufferCapacity;
char * mBufferStart;
char * mBufferEnd;
/**
* Error handling stuff
*/
PRInt32 mErrBehavior;
nsIUnicharEncoder * mErrEncoder;
PRUnichar mErrChar;
/**
* Convert method but *without* the buffer management stuff and *with*
* error handling stuff.
*/
NS_IMETHOD ConvertNoBuff(const PRUnichar * aSrc, PRInt32 * aSrcLength,
char * aDest, PRInt32 * aDestLength);
/**
* Convert method but *without* the buffer management stuff and *without*
* error handling stuff.
*/
NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength,
char * aDest, PRInt32 * aDestLength) = 0;
/**
* Finish method but *without* the buffer management stuff.
*/
NS_IMETHOD FinishNoBuff(char * aDest, PRInt32 * aDestLength);
/**
* Copy as much as possible from the internal buffer to the destination.
*/
nsresult FlushBuffer(char ** aDest, const char * aDestEnd);
public:
/**
* Class constructor.
*/
nsEncoderSupport();
/**
* Class destructor.
*/
virtual ~nsEncoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeEncoder [declaration]
NS_IMETHOD Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
char * aDest, PRInt32 * aDestLength);
NS_IMETHOD Finish(char * aDest, PRInt32 * aDestLength);
NS_IMETHOD Reset();
NS_IMETHOD SetOutputErrorBehavior(PRInt32 aBehavior,
nsIUnicharEncoder * aEncoder, PRUnichar aChar);
//--------------------------------------------------------------------
// Interface nsICharRepresentable [declaration]
NS_IMETHOD FillInfo(PRUint32 *aInfo) = 0;
};
//----------------------------------------------------------------------
// Class nsTableEncoderSupport [declaration]
/**
* Support class for a single-table-driven Unicode encoder.
*
* @created 17/Feb/1999
* @author Catalin Rotaru [CATA]
*/
class nsTableEncoderSupport : public nsEncoderSupport
{
public:
/**
* Class constructor.
*/
nsTableEncoderSupport(uShiftTable * aShiftTable,
uMappingTable * aMappingTable);
/**
* Class destructor.
*/
virtual ~nsTableEncoderSupport();
NS_IMETHOD FillInfo( PRUint32 *aInfo);
protected:
nsIUnicodeEncodeHelper * mHelper; // encoder helper object
uShiftTable * mShiftTable;
uMappingTable * mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsEncoderSupport class [declaration]
NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength,
char * aDest, PRInt32 * aDestLength);
};
//----------------------------------------------------------------------
// Class nsMultiTableEncoderSupport [declaration]
/**
* Support class for a multi-table-driven Unicode encoder.
*
* @created 11/Mar/1999
* @author Catalin Rotaru [CATA]
*/
class nsMultiTableEncoderSupport : public nsEncoderSupport
{
public:
/**
* Class constructor.
*/
nsMultiTableEncoderSupport(PRInt32 aTableCount, uShiftTable ** aShiftTable,
uMappingTable ** aMappingTable);
/**
* Class destructor.
*/
virtual ~nsMultiTableEncoderSupport();
NS_IMETHOD FillInfo( PRUint32 *aInfo);
protected:
nsIUnicodeEncodeHelper * mHelper; // encoder helper object
PRInt32 mTableCount;
uShiftTable ** mShiftTable;
uMappingTable ** mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsEncoderSupport class [declaration]
NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength,
char * aDest, PRInt32 * aDestLength);
};
#endif /* nsUCvIBMSupport_h___ */