nqpinyinconverter.cpp

本例是SYMBIAN C++一个创建短信的例子

/*
 * CNqPinyinConverter class
 * Text Pinyin Engine for NetQin
 * Date: 2008.06.11
 * Author: Tomken
 */


#include "NqPinyinConverter.h"
#include <charconv.h>

static TUint Gbcode2Letter(TUint aCode);
static TUint Des82GbCode(const TDesC8& aDes8);

TInt ConvertToPinyinFirstLetterL(TDes& aPinyin, const TDesC& aText, RFs& aFs)
{
	TInt res = 0;
	CNqPinyinConverter* pc = CNqPinyinConverter::NewL(aFs);
	CleanupStack::PushL(pc);
	res = pc->ConvertToPinyinFirstLetter(aPinyin, aText);
	CleanupStack::PopAndDestroy(pc);
	return res;
}

TInt ConvertToPinyinFullLetterL(TDes& aPinyin, const TDesC& aText, RFs& aFs)
{
	TInt res = 0;
	CNqPinyinConverter* pc = CNqPinyinConverter::NewL(aFs);
	CleanupStack::PushL(pc);
	res = pc->ConvertToPinyinFullLetter(aPinyin, aText);
	CleanupStack::PopAndDestroy(pc);
	return res;
}

CNqPinyinConverter* CNqPinyinConverter::NewL(RFs& aFs)
{
	CNqPinyinConverter* self = new (ELeave) CNqPinyinConverter(aFs);
	CleanupStack::PushL(self);
	self->ConstructL();
	CleanupStack::Pop(self);
	return self;
}

CNqPinyinConverter::CNqPinyinConverter(RFs& aFs) : iFs(aFs)
{
}

CNqPinyinConverter::~CNqPinyinConverter()
{
	delete iCharsetConverter;
}

void CNqPinyinConverter::ConstructL()
{
	iCharsetConverter = CCnvCharacterSetConverter::NewL();
	
	if ( CCnvCharacterSetConverter::EAvailable != iCharsetConverter->PrepareToConvertToOrFromL( KCharacterSetIdentifierGb2312, iFs))
	{
		delete iCharsetConverter;
		iCharsetConverter = NULL;
	}
}

TInt CNqPinyinConverter::ConvertToPinyinFirstLetter(TDes& aPinyin, const TDesC& aText)
{
	if(!iCharsetConverter)
		return KErrNotSupported;
	
	TBuf8<4>  gbCode;
	TInt toCode;
	for(TInt i=0; i<aText.Length(); i++)
	{
		TPtrC singleChar = aText.Mid(i, 1);
		gbCode.SetLength(0);
		iCharsetConverter->ConvertFromUnicode(gbCode, singleChar);
		
		toCode = Des82GbCode(gbCode);
		toCode = Gbcode2Letter(toCode);
		
		if(toCode > 'z')
			aPinyin.Append(singleChar);
		else
			aPinyin.Append(toCode);
	}
	
	return KErrNone;
}

TInt CNqPinyinConverter::ConvertToPinyinFullLetter(TDes& aPinyin, const TDesC& aText)
{
	return ConvertToPinyinFirstLetter(aPinyin, aText);
}


static TUint Gbcode2Letter(TUint aCode)
{
	if (aCode < 0xB0A1) return aCode;
	if (aCode < 0xB0C5) return 'a';
	if (aCode < 0xB2C1) return 'b';
	if (aCode < 0xB4EE) return 'c';
	if (aCode < 0xB6EA) return 'd';
	if (aCode < 0xB7A2) return 'e';
	if (aCode < 0xB8C1) return 'f';
	if (aCode < 0xB9FE) return 'g';
	if (aCode < 0xBBF7) return 'h';
	if (aCode < 0xBFA6) return 'j';
	if (aCode < 0xC0AC) return 'k';
	if (aCode < 0xC2E8) return 'l';
	if (aCode < 0xC4C3) return 'm';
	if (aCode < 0xC5B6) return 'n';
	if (aCode < 0xC5BE) return 'o';
	if (aCode < 0xC6DA) return 'p';
	if (aCode < 0xC8BB) return 'q';
	if (aCode < 0xC8F6) return 'r';
	if (aCode < 0xCBFA) return 's';
	if (aCode < 0xCDDA) return 't';
	if (aCode < 0xCEF4) return 'w';
	if (aCode < 0xD1B9) return 'x';
	if (aCode < 0xD4D1) return 'y';
	if (aCode < 0xD7FA) return 'z';
	return  aCode;
}

static TUint Des82GbCode(const TDesC8& aDes8)
{
	TUint res = 0;
	if(aDes8.Length() < 1)
		return res;
	
	TUint8 lowVal = aDes8[0];
	
	if(aDes8.Length() < 2)
		return lowVal;
	
	TUint8 heightVal = aDes8[1];
	res = (TUint16)((lowVal << 8) | heightVal);
	return res;
}

// end of file