// tregexarg.cpp

//

// Copyright (c) 2005 - 2006, Google Inc.

// All rights reserved.

//

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// met:

//

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// notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

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// this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Author: Sanjay Ghemawat

//

// Heavily refactored for Symbian OS by Accenture.

/***** Parsers for various types *****/

#include "tregexarg.h"

EXPORT_C TBool TRegExArg::ParseNull(const TDesC8& /*aString*/,

	TAny* aDestination)

	{

	// We fail if somebody asked us to store into a non-NULL TAny* pointer

	return (aDestination == NULL);

	}

EXPORT_C TBool TRegExArg::ParseTDes8(const TDesC8& aString, TAny* aDestination)

	{

	if (aDestination == NULL) return ETrue;

	TDes8* dest = reinterpret_cast<TDes8*>(aDestination);

	if(dest->MaxLength() < aString.Length())

		{

		return EFalse;

		}

	else

		{

		dest->Copy(aString);

		return ETrue;

		}

	}

EXPORT_C TBool TRegExArg::ParseTPtrC8(const TDesC8& aString, TAny* aDestination)

	{

	if (aDestination == NULL) return ETrue;

	TPtrC8* dest = reinterpret_cast<TPtrC8*>(aDestination);

	dest->Set(aString);

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTChar(const TDesC8& aString, TAny* aDestination)

	{

	if (aString.Length() != 1) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TChar*>(aDestination)) = aString[0];

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTInt8(const TDesC8& aString, TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TInt8 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val);

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TInt8*>(aDestination)) = val;

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTInt16(const TDesC8& aString, TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TInt16 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val);

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TInt16*>(aDestination)) = val;

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTInt32(const TDesC8& aString, TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TInt32 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val);

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TInt32*>(aDestination)) = val;

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTInt(const TDesC8& aString, TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TInt val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val);

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TInt*>(aDestination)) = val;

	return ETrue;

	}

TBool TRegExArg::ParseTInt64Radix(const TDesC8& aString, TAny* aDestination,

		TRadix aRadix)

	{

	if (aString.Length() == 0)

		return EFalse;

	TInt64 val = 0;

	TLex8 lex(aString);

	// Note TInt64 is treated as unsigned by TLex

	TInt err = lex.Val(val, aRadix);

	// If val is returned as negative then it means we have overflowed.

	if (err || val < 0)	

		return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TInt64*> (aDestination)) = val;

	return ETrue;

	}

TBool TRegExArg::ParseTUint8Radix(const TDesC8& aString, TAny* aDestination,

		TRadix aRadix)

	{

	if (aString.Length() == 0)

		return EFalse;

	TUint8 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val, aRadix);

	if (err)

		return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TUint8*> (aDestination)) = val;

	return ETrue;

	}

TBool TRegExArg::ParseTUint16Radix(const TDesC8& aString, TAny* aDestination,

		TRadix aRadix)

	{

	if (aString.Length() == 0)

		return EFalse;

	TUint16 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val, aRadix);

	if (err)

		return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TUint16*> (aDestination)) = val;

	return ETrue;

	}

TBool TRegExArg::ParseTUint32Radix(const TDesC8& aString, TAny* aDestination,

		TRadix aRadix)

	{

	if (aString.Length() == 0)

		return EFalse;

	TUint32 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val, aRadix);

	if (err)

		return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TUint32*> (aDestination)) = val;

	return ETrue;

	}

TBool TRegExArg::ParseTUintRadix(const TDesC8& aString, TAny* aDestination,

		TRadix aRadix)

	{

	if (aString.Length() == 0)

		return EFalse;

	TUint val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val, aRadix);

	if (err)

		return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TUint*> (aDestination)) = val;

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTReal32(const TDesC8& aString,

	TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TReal32 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val); 

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TReal32*>(aDestination)) = val;

	return ETrue;

	}

EXPORT_C TBool TRegExArg::ParseTReal64(const TDesC8& aString,

	TAny* aDestination)

	{

	if (aString.Length() == 0) return EFalse;

	TReal64 val = 0;

	TLex8 lex(aString);

	TInt err = lex.Val(val); 

	if(err) return EFalse;

	if (aDestination == NULL) return ETrue;

	*(reinterpret_cast<TReal64*>(aDestination)) = val;

	return ETrue;

	}

#define DEFINE_INTEGER_PARSERS(name)										\

	EXPORT_C TBool TRegExArg::Parse##name(const TDesC8& aString,			\

		TAny* aDestination)													\

		{																	\

		return Parse##name##Radix(aString, aDestination, EDecimal);			\

		}																	\

	EXPORT_C TBool TRegExArg::Parse##name##Hex(const TDesC8& aString,		\

		TAny* aDestination)													\

		{																	\

		return Parse##name##Radix(aString, aDestination, EHex);				\

		}																	\

	EXPORT_C TBool TRegExArg::Parse##name##Octal(const TDesC8& aString,		\

		TAny* aDestination)													\

		{																	\

		return Parse##name##Radix(aString, aDestination, EOctal);			\

		}																				

	DEFINE_INTEGER_PARSERS(TInt64)

	DEFINE_INTEGER_PARSERS(TUint8)

	DEFINE_INTEGER_PARSERS(TUint16)

	DEFINE_INTEGER_PARSERS(TUint32)

	DEFINE_INTEGER_PARSERS(TUint)

#undef DEFINE_INTEGER_PARSERS