/*

* Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* 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 <stdlib.h>

const int KErrorIllFormedInput=-1;

int Utf8ToUnicode(wchar_t* aUnicode, const char* aUtf8)

// must '\0'-terminate the output

	{

	wchar_t* startOfUnicode=aUnicode;

	for (;;)

		{

		unsigned int currentUtf8Byte=*aUtf8;

		if (currentUtf8Byte=='\0')

			{

			break;

			}

		if ((currentUtf8Byte&0x80)==0x00)

			{

			if (startOfUnicode!=NULL)

				{

				*aUnicode=(wchar_t)currentUtf8Byte;

				}

			}

		else if ((currentUtf8Byte&0xe0)==0xc0)

			{

			unsigned int currentUnicodeCharacter=((currentUtf8Byte&0x1f)<<6);

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=(currentUtf8Byte&0x3f);

			if (startOfUnicode!=NULL)

				{

				*aUnicode=(wchar_t)currentUnicodeCharacter;

				}

			}

		else if ((currentUtf8Byte&0xf0)==0xe0)

			{

			unsigned int currentUnicodeCharacter=((currentUtf8Byte&0x0f)<<12);

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=((currentUtf8Byte&0x3f)<<6);

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=(currentUtf8Byte&0x3f);

			if (startOfUnicode!=NULL)

				{

				*aUnicode=(wchar_t)currentUnicodeCharacter;

				}

			}

		else if ((currentUtf8Byte&0xf8)==0xf0)

			{

			unsigned int currentUnicodeCharacter=((currentUtf8Byte&0x07)<<8);

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=((currentUtf8Byte&0x3f)<<2);

			if (currentUnicodeCharacter<0x0040)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter-=0x0040;

			if (currentUnicodeCharacter>=0x0400)

				{

				return KErrorIllFormedInput;

				}

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=((currentUtf8Byte&0x30)>>4);

			if (startOfUnicode!=NULL)

				{

				*aUnicode=(wchar_t)(0xd800|currentUnicodeCharacter);

				}

			currentUnicodeCharacter=((currentUtf8Byte&0x0f)<<6);

			++aUtf8;

			currentUtf8Byte=*aUtf8;

			if ((currentUtf8Byte&0xc0)!=0x80)

				{

				return KErrorIllFormedInput;

				}

			currentUnicodeCharacter|=(currentUtf8Byte&0x3f);

			++aUnicode;

			if (startOfUnicode!=NULL)

				{

				*aUnicode=(wchar_t)(0xdc00|currentUnicodeCharacter);

				}

			}

		else

			{

			return KErrorIllFormedInput;

			}

		++aUnicode;

		++aUtf8;

		}

	if (startOfUnicode!=NULL)

		{

		*aUnicode='\0';

		}

	return aUnicode-startOfUnicode;

	}

#include <STDIO.H>

int UnicodeToUtf8(char* aUtf8, const wchar_t* aUnicode)

// must '\0'-terminate the output

	{

	char* startOfUtf8=aUtf8;

	for (;;)

		{

		unsigned int currentUnicodeCharacter=*aUnicode;

		if (currentUnicodeCharacter=='\0')

			{

			break;

			}

		if ((currentUnicodeCharacter&0xff80)==0x0000)

			{

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)currentUnicodeCharacter;

				}

			}

		else if ((currentUnicodeCharacter&0xf800)==0x0000)

			{

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0xc0|(currentUnicodeCharacter>>6));

				}

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0x80|(currentUnicodeCharacter&0x3f));

				}

			}

		else if ((currentUnicodeCharacter&0xfc00)==0xd800)

			{

			currentUnicodeCharacter+=0x0040;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0xf0|((currentUnicodeCharacter>>8)&0x07));

				}

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0x80|((currentUnicodeCharacter>>2)&0x3f));

				}

			{

			unsigned int currentUtf8Byte=(0x80|((currentUnicodeCharacter&0x03)<<4));

			++aUnicode;

			currentUnicodeCharacter=*aUnicode;

			if ((currentUnicodeCharacter&0xfc00)!=0xdc00)

				{

				return KErrorIllFormedInput;

				}

			currentUtf8Byte|=((currentUnicodeCharacter>>6)&0x0f);

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)currentUtf8Byte;

				}

			}

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0x80|(currentUnicodeCharacter&0x3f));

				}

			}

		else

			{

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0xe0|(currentUnicodeCharacter>>12));

				}

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0x80|((currentUnicodeCharacter>>6)&0x3f));

				}

			++aUtf8;

			if (startOfUtf8!=NULL)

				{

				*aUtf8=(char)(0x80|(currentUnicodeCharacter&0x3f));

				}

			}

		++aUtf8;

		++aUnicode;

		}

	if (startOfUtf8!=NULL)

		{

		*aUtf8='\0';

		}

	return aUtf8-startOfUtf8;

	}