gecko-dev/intl/uconv/nsUCSupport.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsUCvJaSupport_h___
#define nsUCvJaSupport_h___
#include "nsCOMPtr.h"
#include "nsIUnicodeEncoder.h"
#include "nsIUnicodeDecoder.h"
#include "uconvutil.h"
#include "mozilla/Mutex.h"
#define ONE_BYTE_TABLE_SIZE 256
inline bool WillOverrun(char16_t* aDest, char16_t* aDestEnd, uint32_t aLength)
{
NS_ASSERTION(aDest <= aDestEnd, "Pointer overrun even before check");
return (uint32_t(aDestEnd - aDest) < aLength);
}
#define CHECK_OVERRUN(dest, destEnd, length) (WillOverrun(dest, destEnd, length))
#ifdef DEBUG
// {7AFC9F0A-CFE1-44ea-A755-E3B86AB1226E}
#define NS_IBASICDECODER_IID \
{ 0x7afc9f0a, 0xcfe1, 0x44ea, { 0xa7, 0x55, 0xe3, 0xb8, 0x6a, 0xb1, 0x22, 0x6e } }
// {65968A7B-6467-4c4a-B50A-3E0C97A32F07}
#define NS_IBASICENCODER_IID \
{ 0x65968a7b, 0x6467, 0x4c4a, { 0xb5, 0xa, 0x3e, 0xc, 0x97, 0xa3, 0x2f, 0x7 } }
class nsIBasicDecoder : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IBASICDECODER_IID)
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIBasicDecoder, NS_IBASICDECODER_IID)
class nsIBasicEncoder : public nsISupports {
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IBASICENCODER_IID)
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIBasicEncoder, NS_IBASICENCODER_IID)
#endif
//----------------------------------------------------------------------
// Class nsBasicDecoderSupport [declaration]
/**
* Support class for the Unicode decoders.
*
* The class source files for this class are in /ucvlatin/nsUCvJaSupport.
* 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
#ifdef DEBUG
,public nsIBasicDecoder
#endif
{
NS_DECL_THREADSAFE_ISUPPORTS
public:
/**
* Class constructor.
*/
nsBasicDecoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeDecoder [declaration]
virtual void SetInputErrorBehavior(int32_t aBehavior) override;
virtual char16_t GetCharacterForUnMapped() override;
protected:
int32_t mErrBehavior;
/**
* Class destructor.
*/
virtual ~nsBasicDecoderSupport();
};
//----------------------------------------------------------------------
// 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;
int32_t mBufferCapacity;
int32_t mBufferLength;
uint32_t mMaxLengthFactor;
/**
* Convert method but *without* the buffer management stuff.
*/
NS_IMETHOD ConvertNoBuff(const char * aSrc, int32_t * aSrcLength,
char16_t * aDest, int32_t * aDestLength) = 0;
void FillBuffer(const char ** aSrc, int32_t aSrcLength);
public:
/**
* Class constructor.
*/
explicit nsBufferDecoderSupport(uint32_t aMaxLengthFactor);
/**
* Class destructor.
*/
virtual ~nsBufferDecoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeDecoder [declaration]
NS_IMETHOD Convert(const char * aSrc, int32_t * aSrcLength,
char16_t * aDest, int32_t * aDestLength);
NS_IMETHOD Reset();
NS_IMETHOD GetMaxLength(const char *aSrc,
int32_t aSrcLength,
int32_t* 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(int32_t aTableCount, const uRange * aRangeArray,
uScanClassID * aScanClassArray,
uMappingTable ** aMappingTable,
uint32_t aMaxLengthFactor);
/**
* Class destructor.
*/
virtual ~nsMultiTableDecoderSupport();
protected:
int32_t mTableCount;
const uRange * mRangeArray;
uScanClassID * mScanClassArray;
uMappingTable ** mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsBufferDecoderSupport class [declaration]
NS_IMETHOD ConvertNoBuff(const char * aSrc, int32_t * aSrcLength,
char16_t * aDest, int32_t * 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.
*/
explicit nsOneByteDecoderSupport(uMappingTable * aMappingTable);
/**
* Class destructor.
*/
virtual ~nsOneByteDecoderSupport();
protected:
uMappingTable * mMappingTable;
char16_t mFastTable[ONE_BYTE_TABLE_SIZE];
bool mFastTableCreated;
mozilla::Mutex mFastTableMutex;
//--------------------------------------------------------------------
// Subclassing of nsBasicDecoderSupport class [declaration]
NS_IMETHOD Convert(const char * aSrc, int32_t * aSrcLength,
char16_t * aDest, int32_t * aDestLength);
NS_IMETHOD GetMaxLength(const char * aSrc, int32_t aSrcLength,
int32_t * aDestLength);
NS_IMETHOD Reset();
};
//----------------------------------------------------------------------
// Class nsBasicEncoder [declaration]
class nsBasicEncoder : public nsIUnicodeEncoder
#ifdef DEBUG
,public nsIBasicEncoder
#endif
{
NS_DECL_ISUPPORTS
public:
/**
* Class constructor.
*/
nsBasicEncoder();
protected:
/**
* 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;
int32_t mBufferCapacity;
char * mBufferStart;
char * mBufferEnd;
/**
* Error handling stuff
*/
int32_t mErrBehavior;
nsCOMPtr<nsIUnicharEncoder> mErrEncoder;
char16_t mErrChar;
uint32_t mMaxLengthFactor;
/**
* Convert method but *without* the buffer management stuff and *with*
* error handling stuff.
*/
NS_IMETHOD ConvertNoBuff(const char16_t * aSrc, int32_t * aSrcLength,
char * aDest, int32_t * aDestLength);
/**
* Convert method but *without* the buffer management stuff and *without*
* error handling stuff.
*/
NS_IMETHOD ConvertNoBuffNoErr(const char16_t * aSrc, int32_t * aSrcLength,
char * aDest, int32_t * aDestLength) = 0;
/**
* Finish method but *without* the buffer management stuff.
*/
NS_IMETHOD FinishNoBuff(char * aDest, int32_t * aDestLength);
/**
* Copy as much as possible from the internal buffer to the destination.
*/
nsresult FlushBuffer(char ** aDest, const char * aDestEnd);
public:
/**
* Class constructor.
*/
explicit nsEncoderSupport(uint32_t aMaxLengthFactor);
/**
* Class destructor.
*/
virtual ~nsEncoderSupport();
//--------------------------------------------------------------------
// Interface nsIUnicodeEncoder [declaration]
NS_IMETHOD Convert(const char16_t * aSrc, int32_t * aSrcLength,
char * aDest, int32_t * aDestLength);
NS_IMETHOD Finish(char * aDest, int32_t * aDestLength);
NS_IMETHOD Reset();
NS_IMETHOD SetOutputErrorBehavior(int32_t aBehavior,
nsIUnicharEncoder * aEncoder, char16_t aChar);
NS_IMETHOD GetMaxLength(const char16_t * aSrc,
int32_t aSrcLength,
int32_t * aDestLength);
};
//----------------------------------------------------------------------
// 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 constructors.
*/
nsTableEncoderSupport(uScanClassID aScanClass,
uShiftOutTable * aShiftOutTable,
uMappingTable * aMappingTable,
uint32_t aMaxLengthFactor);
nsTableEncoderSupport(uScanClassID aScanClass,
uMappingTable * aMappingTable,
uint32_t aMaxLengthFactor);
/**
* Class destructor.
*/
virtual ~nsTableEncoderSupport();
protected:
uScanClassID mScanClass;
uShiftOutTable * mShiftOutTable;
uMappingTable * mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsEncoderSupport class [declaration]
NS_IMETHOD ConvertNoBuffNoErr(const char16_t * aSrc, int32_t * aSrcLength,
char * aDest, int32_t * 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(int32_t aTableCount,
uScanClassID * aScanClassArray,
uShiftOutTable ** aShiftOutTable,
uMappingTable ** aMappingTable,
uint32_t aMaxLengthFactor);
/**
* Class destructor.
*/
virtual ~nsMultiTableEncoderSupport();
protected:
int32_t mTableCount;
uScanClassID * mScanClassArray;
uShiftOutTable ** mShiftOutTable;
uMappingTable ** mMappingTable;
//--------------------------------------------------------------------
// Subclassing of nsEncoderSupport class [declaration]
NS_IMETHOD ConvertNoBuffNoErr(const char16_t * aSrc, int32_t * aSrcLength,
char * aDest, int32_t * aDestLength);
};
#endif /* nsUCvJaSupport_h___ */