bintools/rcomp/src/UNICODE_COMPRESSOR.CPP
author lorewang
Wed, 01 Dec 2010 16:05:36 +0800
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Specify extenal tool with path
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/*
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* Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include "UNICODE_COMPRESSOR.H"
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void CompressUnicode(unsigned char* aOutputBuffer, int& aOutputLength, int aMaximumOutputLength, const UTF16* aInputBuffer, int aInputLength)
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	{
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	TUnicodeCompressor unicodeCompressor;
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	TMemoryUnicodeSource decompressedUnicode(aInputBuffer);
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	TInt numberOfInputElementsConsumed;
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	unicodeCompressor.CompressL(aOutputBuffer, decompressedUnicode, aMaximumOutputLength, aInputLength, &aOutputLength, &numberOfInputElementsConsumed);
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	TInt temp;
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	unicodeCompressor.FlushL(aOutputBuffer, aMaximumOutputLength, temp);
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	aOutputLength+=temp;
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	if (aOutputLength<aMaximumOutputLength && numberOfInputElementsConsumed!=aInputLength)
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		{
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		::Panic(1);
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		}
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	}
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// the rest of the contents of this file is a selective copy of base\store\ustrm\US_UCMP.CPP
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const TUint32 TUnicodeCompressionState::iStaticWindow[EStaticWindows] =
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	{
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	0x0000,		// tags
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	0x0080,		// Latin-1 supplement
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	0x0100,		// Latin Extended-A
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	0x0300,		// Combining Diacritics
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	0x2000,		// General Punctuation
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	0x2080,		// Currency Symbols
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	0x2100,		// Letterlike Symbols and Number Forms
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	0x3000		// CJK Symbols and Punctuation
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	};
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const TUint32 TUnicodeCompressionState::iDynamicWindowDefault[EDynamicWindows] =
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	{
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	0x0080,		// Latin-1 supplement
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	0x00C0,		// parts of Latin-1 supplement and Latin Extended-A
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	0x0400,		// Cyrillic
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	0x0600,		// Arabic
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	0x0900,		// Devanagari
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	0x3040,		// Hiragana
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	0x30A0,		// Katakana
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	0xFF00		// Fullwidth ASCII
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	};
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const TUint16 TUnicodeCompressionState::iSpecialBase[ESpecialBases] =
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	{
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	0x00C0,		// Latin 1 letters (not symbols) and some of Extended-A
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	0x0250,		// IPA extensions
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	0x0370,		// Greek
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	0x0530,		// Armenian
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	0x3040,		// Hiragana
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	0x30A0,		// Katakana
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	0xFF60		// Halfwidth katakana
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	};
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// Single-byte mode tag values
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const TUint8 SQ0 = 0x01;	// <byte>				quote from window 0
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const TUint8 SDX = 0x0B;	// <hbyte> <lbyte>		define window in expansion area
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const TUint8 SQU = 0x0E;	// <hbyte> <lbyte>		quote Unicode value
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const TUint8 SCU = 0x0F;	//						switch to Unicode mode
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const TUint8 SC0 = 0x10;	//						select dynamic window 0
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const TUint8 SD0 = 0x18;	// <byte>				set dynamic window 0 index to <byte> and select it
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// Unicode mode tag values
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const TUint8 UC0 = 0xE0;	//						select dynamic window 0 and switch to single-byte mode
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const TUint8 UD0 = 0xE8;	// <byte>				set dynamic window 0 index to <byte>, select it and switch to
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							//						single-byte mode
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const TUint8 UQU = 0xF0;	// <hbyte>, <lbyte>		quote Unicode value
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const TUint8 UDX = 0xF1;	// <hbyte>, <lbyte>		define window in expansion area and switch to single-byte mode
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TUnicodeCompressionState::TUnicodeCompressionState():
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	iUnicodeWords(0),
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	iMaxUnicodeWords(0),
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	iCompressedBytes(0),
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	iMaxCompressedBytes(0)
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	{
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	Reset();
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	}
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void TUnicodeCompressionState::Reset()
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	{
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	iUnicodeMode = FALSE;
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	iActiveWindowBase = 0x0080;
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	for (int i = 0; i < EDynamicWindows; i++)
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		iDynamicWindow[i] = iDynamicWindowDefault[i];
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	}
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// Return the index of the static window that contains this code, if any, or -1 if there is none.
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TInt TUnicodeCompressionState::StaticWindowIndex(TUint16 aCode)
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	{
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	for (TInt i = 0; i < EStaticWindows; i++)
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		if (aCode >= iStaticWindow[i] && aCode < iStaticWindow[i] + 128)
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			return i;
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	return -1;
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	}
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/*
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If aCode can be accommodated in one of the legal dynamic windows, return the index of that window
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in the offset table. If not return KErrNotFound.
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*/
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TInt TUnicodeCompressionState::DynamicWindowOffsetIndex(TUint16 aCode)
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	{
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	if (aCode < 0x0080)
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		return KErrNotFound;
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	if (aCode >= 0x3400 && aCode <= 0xDFFF)
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		return KErrNotFound;
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	/*
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	Prefer sections that cross half-block boundaries. These are better adapted to actual text.
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	They are represented by offset indices 0xf9..0xff.
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	*/
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	for (int i = 0; i < ESpecialBases; i++)
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		if (aCode >= iSpecialBase[i] && aCode < iSpecialBase[i] + 128)
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			return 0xF9 + i;
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	/*
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	Offset indices 0x01..0x67 represent half blocks from 0x0080 to 0x3380 and
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	0x68..0xA7 represent half blocks from 0xE000 to 0xFF80.
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	*/
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	if (aCode >= 0xE000)
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		aCode -= 0xAC00;
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	return aCode / 0x80;
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	}
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// Return the base of the window represented by offset index <n>. Return 0 if the offset index is illegal.
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TUint32 TUnicodeCompressionState::DynamicWindowBase(TInt aOffsetIndex)
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	{
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	if (aOffsetIndex >= 0xF9 && aOffsetIndex <= 0xFF)
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		{
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		/*
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		WARNING: don't optimise the following two lines by replacing them with
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		'return iSpecialBase[aOffsetIndex - 0xF9];'. To do so would re-introduce a defect
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		in ARM builds caused by optimisation and consequent erroneous fixing up
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		of the array base: see defect EDNGASR-4AGJQX in ER5U defects.
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		*/
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		int special_base_index = aOffsetIndex - 0xF9;
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		return iSpecialBase[special_base_index];
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		}
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	if (aOffsetIndex >= 0x01 && aOffsetIndex <= 0x67)
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		return aOffsetIndex * 0x80;
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	if (aOffsetIndex >= 0x68 && aOffsetIndex <= 0xA7)
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		return aOffsetIndex * 0x80 + 0xAC00;
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	return 0;
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	}
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TBool TUnicodeCompressionState::EncodeAsIs(TUint16 aCode)
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	{
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	return aCode == 0x0000 || aCode == 0x0009 || aCode == 0x000A || aCode == 0x000D ||
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		   (aCode >= 0x0020 && aCode <= 0x007F);
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	}
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void TUnicodeCompressionState::Panic(TPanic aPanic)
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	{
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	::Panic(100+aPanic);
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	}
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EXPORT_C TUnicodeCompressor::TUnicodeCompressor():
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	iInputBufferStart(0),
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	iInputBufferSize(0),
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	iOutputBufferStart(0),
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	iOutputBufferSize(0),
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	iDynamicWindowIndex(0),
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	iOutputStream(NULL),
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	iOutputPointer(NULL),
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	iInput(NULL)
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	{
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	}
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EXPORT_C void TUnicodeCompressor::CompressL(TUint8* aOutput,MUnicodeSource& aInput,
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											TInt aMaxOutputBytes,TInt aMaxInputWords,
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											TInt* aOutputBytes,TInt* aInputWords)
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	{
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	DoCompressL(NULL,aOutput,&aInput,aMaxOutputBytes,aMaxInputWords,aOutputBytes,aInputWords);
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	}
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EXPORT_C TInt TUnicodeCompressor::FlushL(TUint8* aOutput,TInt aMaxOutputBytes,TInt& aOutputBytes)
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	{
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	DoCompressL(NULL,aOutput,NULL,aMaxOutputBytes,0,&aOutputBytes,NULL);
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	return iOutputBufferSize;
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	}
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EXPORT_C TInt TUnicodeCompressor::CompressedSizeL(MUnicodeSource& aInput,TInt aInputWords)
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	{
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	TInt bytes;
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	TUnicodeCompressor c;
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	c.DoCompressL(NULL,NULL,&aInput,KMaxTInt,aInputWords,&bytes,NULL);
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	return bytes;
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	}
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// Compress until input or output is exhausted or an exception occurs.
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void TUnicodeCompressor::DoCompressL(RWriteStream* aOutputStream,TUint8* aOutputPointer,MUnicodeSource* aInput,
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									 TInt aMaxOutputBytes,TInt aMaxInputWords,
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									 TInt* aOutputBytes,TInt* aInputWords)
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	{
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	iOutputStream = aOutputStream;
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	iOutputPointer = aOutputPointer;
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	iInput = aInput;
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	iMaxCompressedBytes = aMaxOutputBytes;
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	iMaxUnicodeWords = aMaxInputWords;
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	iCompressedBytes = iUnicodeWords = 0;
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	FlushOutputBufferL();
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	if (iInput)
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		{
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		while (iUnicodeWords < iMaxUnicodeWords && iCompressedBytes < iMaxCompressedBytes)
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			{
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			TUint16 x = iInput->ReadUnicodeValueL();
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			TAction action(x);
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			iInputBuffer[(iInputBufferStart + iInputBufferSize) % EMaxInputBufferSize] = action;
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			iInputBufferSize++;
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			iUnicodeWords++;
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			if (iInputBufferSize == EMaxInputBufferSize)
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				WriteRunL();
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			}
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		}
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	FlushInputBufferL();
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	if (aOutputBytes)
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		*aOutputBytes = iCompressedBytes;
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	if (aInputWords)
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		*aInputWords = iUnicodeWords;
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	}
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TUnicodeCompressor::TAction::TAction(TUint16 aCode):
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	iCode(aCode)
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	{
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	if (TUnicodeCompressionState::EncodeAsIs(aCode))
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		iTreatment = EPlainASCII;
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	else
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		{
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		iTreatment = TUnicodeCompressionState::DynamicWindowOffsetIndex(aCode);
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		if (iTreatment == -1)
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			{
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			iTreatment = TUnicodeCompressionState::StaticWindowIndex(aCode);
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			if (iTreatment == -1)
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				iTreatment = EPlainUnicode;
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			else
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				iTreatment += EFirstStatic;
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			}
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		}
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	}
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void TUnicodeCompressor::WriteCharacterFromBuffer()
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	{
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	const TAction& action = iInputBuffer[iInputBufferStart];
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	iInputBufferSize--;
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	iInputBufferStart = (iInputBufferStart + 1) % EMaxInputBufferSize;
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	WriteCharacter(action);
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	}
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   266
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void TUnicodeCompressor::FlushInputBufferL()
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	{
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	while (iInputBufferSize > 0 && iCompressedBytes < iMaxCompressedBytes)
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		WriteRunL();
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	}
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void TUnicodeCompressor::WriteRunL()
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	{
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	// Write out any leading characters that can be passed through.
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	if (!iUnicodeMode)
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		while (iInputBufferSize > 0)
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			{
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			const TAction& action = iInputBuffer[iInputBufferStart];
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			if (action.iTreatment == TAction::EPlainASCII ||
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				(action.iCode >= iActiveWindowBase && action.iCode < iActiveWindowBase + 128))
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				WriteCharacterFromBuffer();
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			else
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				break;
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			}
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   286
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   287
	// Write a run of characters that cannot be passed through.
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   288
	int i;
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   289
	if (iInputBufferSize > 0)
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   290
		{
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   291
		/*
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   292
		Find a run of characters with the same treatment and select that treatment
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   293
		if the run has more than one character.
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   294
		*/
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   295
		int treatment = iInputBuffer[iInputBufferStart].iTreatment;
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   296
		int next_treatment = treatment;
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   297
		int run_size = 1;
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   298
		for (i = 1; i < iInputBufferSize; i++)
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   299
			{
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   300
			int index = (iInputBufferStart + i) % EMaxInputBufferSize;
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   301
			next_treatment = iInputBuffer[index].iTreatment;
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   302
			if (next_treatment != treatment)
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   303
				break;
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   304
			run_size++;
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parents:
diff changeset
   305
			}
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   306
		if (run_size > 1)
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diff changeset
   307
			SelectTreatment(treatment);
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parents:
diff changeset
   308
		for (i = 0; i < run_size; i++)
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parents:
diff changeset
   309
			WriteCharacterFromBuffer();
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parents:
diff changeset
   310
		}
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parents:
diff changeset
   311
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   312
	FlushOutputBufferL();
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   313
	}
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parents:
diff changeset
   314
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diff changeset
   315
void TUnicodeCompressor::FlushOutputBufferL()
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diff changeset
   316
	{
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   317
	while (iOutputBufferSize > 0 &&	iCompressedBytes < iMaxCompressedBytes)
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diff changeset
   318
		{
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parents:
diff changeset
   319
		TUint8 byte = iOutputBuffer[iOutputBufferStart];
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parents:
diff changeset
   320
		if (iOutputPointer)
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parents:
diff changeset
   321
			*iOutputPointer++ = byte;
044383f39525 Convert Build package from SFL to EPL
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diff changeset
   322
		else if (iOutputStream)
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diff changeset
   323
			Panic(ECannotUseStreams);
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   324
		iCompressedBytes++;
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parents:
diff changeset
   325
		iOutputBufferSize--;
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parents:
diff changeset
   326
		iOutputBufferStart = (iOutputBufferStart + 1) % EMaxOutputBufferSize;
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   327
		}
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parents:
diff changeset
   328
	}
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   329
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   330
void TUnicodeCompressor::SelectTreatment(TInt aTreatment)
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parents:
diff changeset
   331
	{
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parents:
diff changeset
   332
	if (aTreatment == TAction::EPlainUnicode)
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parents:
diff changeset
   333
		{
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parents:
diff changeset
   334
		// Switch to Unicode mode if not there already.
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   335
		if (!iUnicodeMode)
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   336
			{
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   337
			WriteByte(SCU);
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   338
			iUnicodeMode = TRUE;
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   339
			}
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   340
		return;
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   341
		}
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   342
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   343
	if (aTreatment == TAction::EPlainASCII)
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   344
		{
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   345
		// Switch to single-byte mode, using the current dynamic window, if not there already.
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   346
		if (iUnicodeMode)
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parents:
diff changeset
   347
			{
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   348
			WriteByte(UC0 + iDynamicWindowIndex);
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   349
			iUnicodeMode = FALSE;
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   350
			}
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   351
		return;
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   352
		}
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   353
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   354
	if (aTreatment >= TAction::EFirstDynamic && aTreatment <= TAction::ELastDynamic)
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   355
		{
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   356
		TUint32 base = DynamicWindowBase(aTreatment);
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   357
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   358
		// Switch to the appropriate dynamic window if it is available; if not, redefine and select dynamic window 4.
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   359
		for (int i = 0; i < EDynamicWindows; i++)
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   360
			if (base == iDynamicWindow[i])
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   361
				{
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   362
				if (iUnicodeMode)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   363
					WriteByte(UC0 + i);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   364
				else if (i != iDynamicWindowIndex)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   365
					WriteByte(SC0 + i);
044383f39525 Convert Build package from SFL to EPL
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parents:
diff changeset
   366
				iUnicodeMode = FALSE;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   367
				iDynamicWindowIndex = i;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   368
				iActiveWindowBase = base;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   369
				return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   370
				}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   371
		if (iUnicodeMode)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   372
			WriteByte(UD0 + 4);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   373
		else
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   374
			WriteByte(SD0 + 4);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   375
		iDynamicWindowIndex = 4;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   376
		iUnicodeMode = FALSE;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   377
		WriteByte(aTreatment);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   378
		iDynamicWindow[4] = base;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   379
		iActiveWindowBase = base;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   380
		return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   381
		}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   382
	}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   383
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   384
// Write a character without changing mode or window.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   385
void TUnicodeCompressor::WriteCharacter(const TAction& aAction)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   386
	{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   387
	if (iUnicodeMode)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   388
		WriteUCharacter(aAction.iCode);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   389
	else
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   390
		WriteSCharacter(aAction);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   391
	}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   392
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   393
void TUnicodeCompressor::WriteUCharacter(TUint16 aCode)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   394
	{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   395
	// Emit the 'quote Unicode' tag if the character would conflict with a tag.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   396
	if (aCode >= 0xE000 && aCode <= 0xF2FF)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   397
		WriteByte(UQU);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   398
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   399
	// Write the Unicode value big-end first.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   400
	WriteByte((aCode >> 8) & 0xFF);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   401
	WriteByte(aCode & 0xFF);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   402
	}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   403
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   404
void TUnicodeCompressor::WriteByte(TUint aByte)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   405
	{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   406
	if (iOutputBufferSize >= EMaxOutputBufferSize)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   407
		Panic(EOutputBufferOverflow);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   408
	iOutputBuffer[(iOutputBufferStart + iOutputBufferSize) % EMaxOutputBufferSize] = (TUint8)aByte;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   409
	iOutputBufferSize++;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   410
	}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   411
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   412
void TUnicodeCompressor::WriteSCharacter(const TAction& aAction)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   413
	{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   414
	// Characters in the range 0x0020..0x007F, plus nul, tab, cr, and lf, can be emitted as their low bytes.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   415
	if (aAction.iTreatment == TAction::EPlainASCII)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   416
		{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   417
		WriteByte(aAction.iCode);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   418
		return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   419
		}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   420
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   421
	// Characters in a static window can be written using SQ<n> plus a byte in the range 0x00-0x7F
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   422
	if (aAction.iTreatment >= TAction::EFirstStatic && aAction.iTreatment <= TAction::ELastStatic)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   423
		{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   424
		int window = aAction.iTreatment - TAction::EFirstStatic;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   425
		WriteByte(SQ0 + window);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   426
		WriteByte(aAction.iCode);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   427
		return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   428
		}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   429
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   430
	// Characters in the current dynamic window can be written as a byte in the range 0x80-0xFF.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   431
	if (aAction.iCode >= iActiveWindowBase && aAction.iCode < iActiveWindowBase + 128)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   432
		{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   433
		WriteByte(aAction.iCode - iActiveWindowBase + 0x80);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   434
		return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   435
		}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   436
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   437
	// Characters in another dynamic window can be written using SQ<n> plus a byte in the range 0x80-0xFF
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   438
	int i;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   439
	for (i = 0; i < EDynamicWindows; i++)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   440
		if (aAction.iCode >= iDynamicWindow[i] && aAction.iCode < iDynamicWindow[i] + 128)
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   441
			{
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   442
			WriteByte(SQ0 + i);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   443
			WriteByte(aAction.iCode - iDynamicWindow[i] + 0x80);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   444
			return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   445
			}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   446
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   447
	// Other characters can be quoted.
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   448
	WriteByte(SQU);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   449
	WriteByte((aAction.iCode >> 8) & 0xFF);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   450
	WriteByte(aAction.iCode & 0xFF);
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   451
	return;
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   452
	}
044383f39525 Convert Build package from SFL to EPL
Alex Gilkes <alex.gilkes@nokia.com>
parents:
diff changeset
   453