/*

* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#include <e32std.h>

#include <convdata.h>

#define ARRAY_LENGTH(aArray) (sizeof(aArray)/sizeof((aArray)[0]))

LOCAL_D const SCnvConversionData::SVariableByteData::SRange iso88591VariableByteDataRanges[]=

	{

		{

		0x00,

		0xff,

		0,

		0

		}

	};

LOCAL_D const SCnvConversionData::SOneDirectionData::SRange iso88591ToUnicodeDataRanges[]=

	{

		{

		0x00,

		0x7f,

		SCnvConversionData::SOneDirectionData::SRange::EDirect,

		0,

		0,

			{

			0,

			0

			}

		},

		{

		0x81,

		0xff,

		SCnvConversionData::SOneDirectionData::SRange::EDirect,

		0,

		0,

			{

			0,

			0

			}

		},

		{

		0x80,

		0x80,

		SCnvConversionData::SOneDirectionData::SRange::EOffset,

		0,

		0,

			{

			STATIC_CAST(TUint, 8236)

			}

		}

	};

LOCAL_D const SCnvConversionData::SOneDirectionData::SRange unicodeToIso88591DataRanges[]=

	{

		{

		0x0000,

		0x007f,

		SCnvConversionData::SOneDirectionData::SRange::EDirect,

		1,

		0,

			{

			0,

			0

			}

		},

		{

		0x0081,

		0x00ff,

		SCnvConversionData::SOneDirectionData::SRange::EDirect,

		1,

		0,

			{

			0,

			0

			}

		},

		{

		0x20ac,

		0x20ac,

		SCnvConversionData::SOneDirectionData::SRange::EOffset,

		1,

		0,

			{

			STATIC_CAST(TUint, -8236)

			}

		}

	};

GLREF_D const SCnvConversionData iso88591ConversionData=

	{

	SCnvConversionData::EUnspecified,

		{

		ARRAY_LENGTH(iso88591VariableByteDataRanges),

		iso88591VariableByteDataRanges

		},

		{

		ARRAY_LENGTH(iso88591ToUnicodeDataRanges),

		iso88591ToUnicodeDataRanges

		},

		{

		ARRAY_LENGTH(unicodeToIso88591DataRanges),

		unicodeToIso88591DataRanges

		},

	NULL,

	NULL

	};

GLREF_C void IsCharacterSetISO88591(TInt& aConfidenceLevel, const TDesC8& aSample)

	{

	TInt sampleLength = aSample.Length();

	aConfidenceLevel = 75;

	for (TInt i=0; i<sampleLength; ++i)

		{

		// ISO88591 includes ASCII as well

		// first check if the char is in the range 0x80 - 0x9f (controls codes)

		// If it is in that range then it's not ISO88591

		if ((aSample[i] >= 0x80) && (aSample[i] <= 0x9f))

			{

			aConfidenceLevel=0;

			break;

			}

		// 0xf7 is the division symbol in ISO88591.

		// 0xd7 is the division symbol in ISO88591.If char on either side of the division

		// symbol is a number then the confidence that it's ISO88591 increases

		if( i>0 && ((aSample[i]==0xf7) || (aSample[i]==0xd7)) && ((i+1)<sampleLength) )

			{

			if ( (aSample[i-1] >= 0x30) && (aSample[i-1] <= 0x39) &&  // char before is a number

				 (aSample[i+1] >= 0x30) && (aSample[i+1] <= 0x39) )   // char after is a number

				{

				aConfidenceLevel+=5;

				}

			}

		// Can also use the currency symbol to increase confidence if the char after a 

		// currency symbol is numeric

		if((aSample[i]>=0xa2) && (aSample[i] <= 0xa5) && ((i+1)<sampleLength))

			{

			if ((aSample[i+1] >= 0x30) && (aSample[i+1] <= 0x39))

				{

				aConfidenceLevel+=5; 

				}

			}

		} // for loop

	aConfidenceLevel =(aConfidenceLevel >0)? ((aConfidenceLevel > 100)? 100: aConfidenceLevel): 0;

	}