/*

 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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 <fstream>

 #include "utils.h"

 #include "logger.h"

 #ifndef __LINUX__

 #include <windows.h>

 #endif

 typedef unsigned char TUint8;

 typedef unsigned int TUint;

 #ifdef __LINUX__

 void OpenUtf8FStreamForRead(std::fstream &aFStream, const char *aUtf8FileName)

 {

 	aFStream.open(aUtf8FileName, std::ios_base::binary | std::ios_base::in);

 }

 void OpenUtf8FStreamForWrite(std::fstream &aFStream, const char *aUtf8FileName)

 {

 	aFStream.open(aUtf8FileName, std::ios_base::binary | std::ios_base::trunc | std::ios_base::out);

 }

 #else

 WCHAR *WindowsUtf8ToUtf16(const char *aUtf8)

 {

 	int utf8Len = strlen(aUtf8) + 1; // We want to copy the terminator to the new string

 	int utf16Space = MultiByteToWideChar(CP_UTF8, 0, aUtf8, utf8Len, 0, 0);

 	if(utf16Space <= 0)

 		{

 		dbg << Log::Indent() << "Failed to convert UTF-8 '" << aUtf8 << "' to UTF16" << Log::Endl();

 		FatalError();

 		return 0;

 		}

 	// prog << Log::Indent() << "utf16Space " << utf16Space << Log::Endl();

 	WCHAR *utf16 = new WCHAR[utf16Space];

 	(void) MultiByteToWideChar(CP_UTF8, 0, aUtf8, utf8Len, utf16, utf16Space);

 #if 0

 	prog << Log::Indent() << "Raw UTF16 name is (chars " << utf16Space << ")" << Log::Endl();

 	for(int i=0; i<utf16Space*2; ++i)

 		{

 		prog << TUint(((TUint8 *)utf16)[i]) << Log::Endl();

 		}

 #endif

 	return utf16;

 }

 CHAR *WindowsUtf16ToUtf8(const WCHAR *aUtf16)

 {

 	int utf16Len = wcslen(aUtf16) + 1; // We want to copy the terminator to the new string

 	int utf8Space = WideCharToMultiByte(CP_UTF8, 0, aUtf16, utf16Len, 0, 0, 0, 0);

 	if(utf8Space <= 0)

 		{

 		dbg << Log::Indent() << "Failed to convert UTF16 string to UTF8" << Log::Endl();

 		FatalError();

 		return 0;

 		}

 	//prog << Log::Indent() << "utf8Space " << utf8Space << Log::Endl();

 	CHAR *utf8 = new CHAR[utf8Space];

 	(void) WideCharToMultiByte(CP_UTF8, 0, aUtf16, utf16Len, utf8, utf8Space, 0, 0);

 #if 0

 	prog << Log::Indent() << "Raw UTF8 name is (chars " << utf8Space << ")" << Log::Endl();

 	for(int i=0; i<utf8Space; ++i)

 		{

 		prog << TUint(((TUint8 *)utf8)[i]) << Log::Endl();

 		}

 #endif

 	return utf8;

 }

 WCHAR *WindowsRetrieveDosName(const WCHAR *aLongName)

 {

 	// Convert to a short DOS file name. File MUST already exist!

 	// len will be space required for string and terminator

 	DWORD len = GetShortPathNameW((WCHAR *)aLongName, 0, 0);

 	if( len <= 0 )

 		{

 		prog << Log::Indent() << "Failed to find existing file and retrieve short name" << Log::Endl();

 		return 0;

 		}

 	//prog << Log::Indent() << "space required for short name is " << len << Log::Endl();

 	WCHAR *shortName = new WCHAR[len];

 	(void) GetShortPathNameW(aLongName, shortName, len);

 	return shortName;

 }

 void OpenUtf8FStreamForRead(std::fstream &aFStream, const char *aUtf8FileName)

 {

 	// Unfortunately the windows C++ STL library will not open files specified via a UTF-8 filename.

 	// The workaround is to convert the UTF-8 name to the short DOS compatible name and open that instead

 	// First convert the UTF-8 name to UTF-16 for use with the windows APIs

 	WCHAR *utf16Name = WindowsUtf8ToUtf16(aUtf8FileName);

 	// Obtain short DOS compatible name for file

 	WCHAR *utf16NameDos = WindowsRetrieveDosName(utf16Name);

 	if(utf16NameDos == 0)

 		{

 		aFStream.setstate(std::ios_base::badbit);

 		delete [] utf16Name;

 		return;

 		}

 	char *utf8NameDos = WindowsUtf16ToUtf8(utf16NameDos);

 	aFStream.open(utf8NameDos, std::ios_base::binary | std::ios_base::in);

 	delete [] utf8NameDos;

 	delete [] utf16NameDos;

 	delete [] utf16Name;

 	return;

 }

 void OpenUtf8FStreamForWrite(std::fstream &aFStream, const char *aUtf8FileName)

 {

 	// Unfortunately the windows C++ STL library will not open files specified via a UTF-8 filename.

 	// The workaround is to make sure the file already exists and then convert the UTF-8 name to the short DOS compatible name 

 	// and open that instead

 	// First convert the UTF-8 name to UTF-16 for use with the windows APIs

 	WCHAR *utf16Name = WindowsUtf8ToUtf16(aUtf8FileName);

 	// Make sure the file exists

 	HANDLE fh = CreateFileW((WCHAR *)utf16Name, GENERIC_WRITE, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 0,  CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0 );

 	if(fh == INVALID_HANDLE_VALUE)

 		{

 		dbg << Log::Indent() << "Failed to create file '" << aUtf8FileName << "'" << Log::Endl();

 		aFStream.setstate(std::ios_base::badbit);

 		delete [] utf16Name;

 		return;

 		}

 	// Close handle

 	CloseHandle(fh);

 	// Obtain short DOS compatible name for file

 	WCHAR *utf16NameDos = WindowsRetrieveDosName(utf16Name);

 	if(utf16NameDos == 0)

 		{

 		aFStream.setstate(std::ios_base::badbit);

 		delete [] utf16Name;

 		return;

 		}

 	char *utf8NameDos = WindowsUtf16ToUtf8(utf16NameDos);

 	aFStream.open(utf8NameDos, std::ios_base::binary | std::ios_base::trunc | std::ios_base::out);

 	delete [] utf8NameDos;

 	delete [] utf16NameDos;

 	delete [] utf16Name;

 	return;

 }

 #endif

 // End of file