1 // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #include <e32std.h>

    17 #include "server.h"

    18 #include "inifile.h"

    19 

    20 // uncomment so that if the wsini.ini file is not found on drive Wserv loaded from or drive Z: (if different)

    21 // it will be searched for on drive C: (if different from Wserv's drive)

    22 //#define LOAD_INI_FILE_FROM_DRIVE_Z_OR_C

    23 

    24 

    25 GLREF_D CDebugLogBase *wsDebugLog;

    26 

    27 _LIT(KDefaultSectionName,"DEFAULT");

    28 _LIT(KCommentMarker,"//");

    29 _LIT(KScreenSectionName,"SCREEN");

    30 const TUint16 KNewSection('[');

    31 const TUint16 KSpaceChar(' ');

    32 const TUint16 KNewSection2(']');

    33 const TInt KDefaultSectionNumber(0);

    34 const TInt KDefaultScreenId(-1);

    35 

    36 

    37 CIniFile::CIniFile()

    38 	{}

    39 

    40 CIniFile::~CIniFile()

    41 	{

    42 	FreeData();

    43 	}

    44 

    45 CIniSection * CIniFile::FindSection(TInt aScreen)

    46 	{

    47 	for (TInt sect = 0; sect < iSectionArray.Count(); ++sect)

    48 		{

    49 		if (iSectionArray[sect]->Screen() == aScreen)

    50 			{

    51 			return iSectionArray[sect];

    52 			}

    53 		}

    54 	return NULL;

    55 	}

    56 

    57 CIniSection * CIniFile::FindSection(const TDesC& aName)

    58 	{

    59 	for (TInt sect = 0; sect < iSectionArray.Count(); ++sect)

    60 		{

    61 		if (iSectionArray[sect]->Screen() == KDefaultScreenId && !iSectionArray[sect]->Name().CompareF(aName))

    62 			{

    63 			return iSectionArray[sect];

    64 			}

    65 		}

    66 	return NULL;

    67 	}

    68 

    69 /* Processes a .ini file entry section name.

    70 

    71  @return the corresponding index.

    72  @param aLine Input line of text from the .ini file, stripped of comments & excess whitespace.

    73  @leave KErrNoMemory

    74  */

    75 CIniSection * CIniFile::AddOrFindIniSectionL(TPtr& aSectionName)

    76 	{

    77 	aSectionName.Trim();

    78 

    79 	// DEFAULT section

    80 	if (aSectionName.CompareF(KDefaultSectionName) == 0)

    81 		{ 

    82 		return iSectionArray[KDefaultSectionNumber];

    83 		}

    84 

    85 	// SCREENx section

    86 	if (0 == aSectionName.FindF(KScreenSectionName))

    87 		{

    88 		TLex lex(aSectionName.Mid(KScreenSectionName().Length()));

    89 		TInt screenNum;

    90 		lex.SkipSpace();

    91 		if (lex.Val(screenNum) == KErrNone)

    92 			{

    93 			return AddOrFindScreenSectionL(screenNum);

    94 			}

    95 		}

    96 		

    97 	// other section

    98 	return AddOrFindNamedSectionL(aSectionName);

    99 	}

   100 

   101 CIniSection * CIniFile::CreateSectionL(TInt aScreen)

   102 	{

   103 	CIniSection* newSection = new (ELeave) CIniSection(aScreen);

   104 	CleanupStack::PushL( newSection ) ;

   105 	newSection->ConstructL() ;

   106 	User::LeaveIfError(iSectionArray.Append(newSection));

   107 	CleanupStack::Pop( newSection ) ;

   108 	if (aScreen + 1 > iScreenCount)

   109 		iScreenCount = aScreen + 1;

   110 	return newSection;

   111 	}

   112 

   113 CIniSection * CIniFile::CreateSectionL(const TDesC& aName)

   114 	{

   115 	CIniSection* newSection = new (ELeave) CIniSection(KDefaultScreenId);

   116 	CleanupStack::PushL( newSection ) ;

   117 	newSection->ConstructL(aName) ;

   118 	User::LeaveIfError(iSectionArray.Append(newSection));

   119 	CleanupStack::Pop( newSection ) ;

   120 	return newSection;

   121 	}

   122 

   123 

   124 void CIniFile::doConstructL(RFile &aFile)

   125 	{

   126 	TFileText textFile;

   127 	textFile.Set(aFile);

   128 	const TInt KMaxIniLine=256;

   129 	TBuf<KMaxIniLine> readLine;

   130 	TBool first=ETrue;

   131 

   132 	// always have a [DEFAULT] section

   133 	CIniSection * currentSection = CreateSectionL(KDefaultSectionName);

   134 

   135 	FOREVER

   136 		{

   137 		TInt err=textFile.Read(readLine);

   138 		if (err==KErrEof)

   139 			break;

   140 		User::LeaveIfError(err);

   141 

   142 		if (readLine.Length()>0)

   143 			{

   144 			if (first && (readLine[0]==0xFFFE || readLine[0]==0xFEFF))

   145 				readLine.Delete(0,1);

   146 			

   147 			// Comment marker "//" indicates the rest of the line should be discarded

   148 			TInt commentStart = readLine.Find(KCommentMarker);

   149 			if (commentStart != KErrNotFound)

   150 				{

   151 				readLine.Delete(commentStart, readLine.Length());

   152 				}

   153 

   154 			// compact unnecessary whitespace

   155 			readLine.TrimAll();

   156 

   157 			// anything left in buffer?

   158 			if (readLine.Length() > 0)

   159 				{

   160 				// section name requires "[" and "]"

   161 				if (readLine[0] == KNewSection && readLine.LocateReverse(KNewSection2) == readLine.Length() - 1)

   162 					{

   163 					TPtr nameText = readLine.MidTPtr(1, readLine.Length() - 2); // strip [ and ]

   164 					currentSection = AddOrFindIniSectionL(nameText);

   165 					}

   166 				else

   167 					{

   168 					if (currentSection)

   169 						{

   170 						currentSection->AddVariableL(readLine);

   171 						}

   172 					}

   173 				}

   174 			first=EFalse;

   175 			}

   176 		}

   177 

   178 	if (iScreenCount == 0)

   179 		{

   180 		iScreenCount = 1;

   181 		}

   182 	}

   183 

   184 CIniFile* CIniFile::NewL()

   185     {

   186     CIniFile* self = new (ELeave) CIniFile();

   187     CleanupStack::PushL(self);

   188     self->ConstructL();

   189     CleanupStack::Pop(self);

   190     return self;

   191     }

   192 

   193 void CIniFile::FreeData() 

   194 	{

   195 	iSectionArray.ResetAndDestroy() ;

   196 	iScreenCount = 0;

   197 	}

   198 

   199 void errFreeData(TAny *aIniFile)

   200 	{

   201 	((CIniFile *)aIniFile)->FreeData();

   202 	}

   203 

   204 HBufC* IniFileSearchPathLC()

   205 	{

   206 	_LIT(KPath,"\\SYSTEM\\DATA\\");

   207 	_LIT(KPathSep,";");

   208 	const TInt KLengthPerPath = 2 + KPath().Length();

   209 	// work out which drive Wserv loaded from

   210 	RProcess self;

   211 	TFileName myPath = self.FileName();

   212 	TParsePtrC myDrive(myPath);

   213 	TDriveUnit myDriveUnit(myDrive.Drive());

   214 	// need extra buffer space for search paths for drives Z: or C: ?

   215 #if defined(LOAD_INI_FILE_FROM_DRIVE_Z_OR_C)

   216 	TInt numPaths = 2;

   217 	if (myDriveUnit != EDriveZ && myDriveUnit != EDriveC)

   218 		{

   219 		numPaths += 1;

   220 		}

   221 #else

   222 	TInt numPaths = 1;

   223 	if (myDriveUnit != EDriveZ)

   224 		{

   225 		numPaths += 1;

   226 		}

   227 #endif

   228 	HBufC* searchPath = HBufC::NewLC(numPaths * KLengthPerPath + (numPaths - 1) * KPathSep().Length());

   229 	TPtr pPath(searchPath->Des());

   230 	pPath.Append(myDrive.Drive());

   231 	pPath.Append(KPath);

   232 	if (myDriveUnit != EDriveZ)

   233 		{

   234 		pPath.Append(KPathSep);

   235 		pPath.Append(TDriveUnit(EDriveZ).Name());

   236 		pPath.Append(KPath);

   237 		}

   238 #if defined(LOAD_INI_FILE_FROM_DRIVE_Z_OR_C)

   239 	if (myDriveUnit != EDriveC)

   240 		{

   241 		pPath.Append(KPathSep);

   242 		pPath.Append(TDriveUnit(EDriveC).Name());

   243 		pPath.Append(KPath);

   244 		}

   245 #endif

   246 	return searchPath;

   247 	}

   248 

   249 void CIniFile::ConstructL()

   250 	{

   251 	TAutoClose<RFs> fs;

   252 	User::LeaveIfError(fs.iObj.Connect());

   253 	fs.iObj.SetNotifyUser(EFalse);

   254 	fs.PushL();

   255 	HBufC* searchPath = IniFileSearchPathLC();

   256 	_LIT(KFileName,"WSINI.INI");

   257 	TFindFile findinifile(fs.iObj);

   258 	TInt err=findinifile.FindByPath(KFileName,searchPath);

   259 	User::LeaveIfError(err);

   260 	CleanupStack::PopAndDestroy(searchPath);

   261  	TAutoClose<RFile> file;

   262 	User::LeaveIfError(file.iObj.Open(fs.iObj,findinifile.File(),EFileStreamText|EFileRead));

   263 	file.PushL();

   264 	CleanupStack::PushL(TCleanupItem(errFreeData,this));

   265 	doConstructL(file.iObj);

   266 	CleanupStack::Pop(); // TCleanupItem

   267 	file.Pop();

   268 	fs.Pop();

   269 	}

   270 

   271 /* If the Section for the screen exists find the data, otherwise create a new data structure.

   272 

   273  @param aScreen Screen number

   274  @return index to section

   275  @leave KErrNoMemory

   276  */

   277 CIniSection * CIniFile::AddOrFindScreenSectionL(TInt aScreen)

   278 	{

   279 	CIniSection * section = FindSection(aScreen);

   280 	if (!section)

   281 		section = CreateSectionL(aScreen);

   282 	return section;

   283 	}

   284 

   285 /* If the Section exists find the data, otherwise create a new data structure.

   286 

   287  @param aName section name

   288  @return index to section

   289  @leave KErrNoMemory

   290  */

   291 CIniSection * CIniFile::AddOrFindNamedSectionL(const TDesC& aName)

   292 	{

   293 	CIniSection * section = FindSection(aName);

   294 	if (!section)

   295 		section = CreateSectionL(aName);

   296 	return section;

   297 	}

   298 

   299 TBool CIniFile::FindVar(const TDesC &aVarName, TPtrC &aResult)

   300 	{

   301 	return iSectionArray[KDefaultSectionNumber]->FindVar(aVarName, aResult);

   302 	}

   303 

   304 

   305 TBool CIniFile::FindVar(const TDesC &aVarName, TInt &aResult)

   306 	{

   307 	return iSectionArray[KDefaultSectionNumber]->FindVar(aVarName, aResult);

   308 	}

   309 

   310 TBool CIniFile::FindVar(const TDesC &aVarName)

   311 //

   312 // Used to simply detect the presence of the specified variable name

   313 //

   314 	{

   315 	TPtrC ptr(NULL,0);

   316 	return FindVar(aVarName, ptr);

   317 	}

   318 

   319 // FindVar in [SCREENx] sections

   320 TBool CIniFile::FindVar( TInt aScreen, const TDesC &aVarName)

   321 	{

   322 	TPtrC ptr(NULL,0);

   323 	return FindVar(aScreen, aVarName, ptr);

   324 	}

   325 

   326 TBool CIniFile::FindVar( TInt aScreen, const TDesC& aVarName, TPtrC &aResult )

   327 	{

   328 	CIniSection * section = FindSection(aScreen);

   329 	TBool found = EFalse;

   330 	if (section)

   331 		found = section->FindVar(aVarName, aResult);

   332 	if (!found)

   333 		found = FindVar(aVarName, aResult);

   334 	return found;

   335 	}

   336 

   337 TBool CIniFile::FindVar(TInt aScreen, const TDesC &aVarName, TInt &aResult)

   338 	{

   339 	CIniSection * section = FindSection(aScreen);

   340 	TBool found = EFalse;

   341 	if (section)

   342 		found = section->FindVar(aVarName, aResult);

   343 	if (!found)

   344 		found = FindVar(aVarName, aResult);

   345 	return found;

   346 	}

   347 

   348 // FindVar in named sections

   349 TBool CIniFile::FindVar(const TDesC& aSectionName, const TDesC &aVarName)

   350 	{

   351 	TPtrC ptr(NULL,0);

   352 	return FindVar(aSectionName, aVarName, ptr);

   353 	}

   354 

   355 TBool CIniFile::FindVar(const TDesC& aSectionName, const TDesC& aVarName, TPtrC &aResult )

   356 	{

   357 	CIniSection * section = FindSection(aSectionName);

   358 	TBool found = EFalse;

   359 	if (section)

   360 		found = section->FindVar(aVarName, aResult);

   361 	if (!found)

   362 		found = FindVar(aVarName, aResult);

   363 	return found;

   364 	}

   365 

   366 TBool CIniFile::FindVar(const TDesC& aSectionName, const TDesC &aVarName, TInt &aResult)

   367 	{

   368 	CIniSection * section = FindSection(aSectionName);

   369 	TBool found = EFalse;

   370 	if (section)

   371 		found = section->FindVar(aVarName, aResult);

   372 	if (!found)

   373 		found = FindVar(aVarName, aResult);

   374 	return found;

   375 	}

   376 

   377 TInt CIniFile::NumberOfScreens() const 

   378 	{

   379   	return iScreenCount;

   380 	}

   381 

   382 

   383 // CIniSection.

   384 // ini file structure is now in sections like this

   385 //

   386 // [DEFAULT]

   387 // varname value

   388 // varname2 value2

   389 // [SCREEN0]

   390 // screenvar value

   391 // etc

   392 //

   393 // CIniSection represents a section - i.e. section name and content pairs.  

   394 // Content pairs are as ini file was previously (so use same code)

   395 // [default] section name is optional to support backwards compatibility

   396 // if no sutable value is found in a [screenN] section the [default] section will be searched.

   397 

   398 

   399 CIniSection::CIniSection(TInt aScreen) : iScreen(aScreen)

   400 	{}

   401 

   402 void CIniSection::ConstructL()

   403 	{

   404 	iPtrArray = new (ELeave) CArrayPtrFlat<TDesC>(8) ;

   405 	}

   406 

   407 void CIniSection::ConstructL(const TDesC& aName)

   408 	{

   409 	iName.CreateL(aName);

   410 	ConstructL();

   411 	}

   412 

   413 CIniSection::~CIniSection()

   414 	{

   415 	iName.Close();

   416 	iPtrArray->ResetAndDestroy() ;

   417 	delete iPtrArray ;

   418 	}

   419 

   420 inline TInt CIniSection::Screen() const

   421 	{ return iScreen; }

   422 

   423 inline const TDesC& CIniSection::Name() const

   424 	{ return iName; }

   425 

   426 TBool CIniSection::FindVar( const TDesC& aVarName, TPtrC &aResult )

   427 	{

   428 	if (iPtrArray)

   429 		{

   430 		TInt index(KErrNotFound);

   431 		

   432 		if (FindVarName(aVarName, index))

   433 			{

   434 			TLex lex((*iPtrArray)[index]->Mid(aVarName.Length()));

   435 			lex.SkipSpace();

   436 			aResult.Set(lex.Remainder());

   437 

   438 			if (wsDebugLog)

   439 				{

   440 				wsDebugLog->IniFileSettingRead(iScreen, aVarName, ETrue, aResult);

   441 				}

   442 			return(ETrue);

   443 			}

   444 		}

   445 

   446 	if (wsDebugLog)

   447 		{

   448 		wsDebugLog->IniFileSettingRead(iScreen, aVarName, EFalse, KNullDesC);

   449 		}

   450 	return(EFalse);

   451 	}

   452 

   453 /*

   454  create a TPtrC with just the first word (variable name) in the given string

   455  */

   456 TPtrC CIniSection::VarName(const TDesC& aVarString)

   457 	{

   458 	TInt varLength = aVarString.Locate(KSpaceChar);

   459 	if (varLength == KErrNotFound)

   460 		{

   461 		varLength = aVarString.Length();

   462 		}

   463 	return aVarString.Left(varLength);

   464 	}

   465 

   466 

   467 TBool CIniSection::FindVar(const TDesC &aVarName, TInt &aResult)

   468 	{

   469 	TPtrC ptr(NULL,0);

   470 	// do text Find

   471 	if (FindVar(aVarName, ptr))

   472 		{

   473 		TLex lex(ptr);

   474 		_LIT(HexFormatCheck,"0x");

   475 		TPtrC hexPtr(HexFormatCheck);

   476 		if(ptr.Left(2) != hexPtr)

   477 			{

   478 			if (lex.Val(aResult) == KErrNone)

   479 				{

   480 				return ETrue;

   481 				}

   482 			}

   483 		else

   484 			{

   485 			lex.SkipAndMark(2); //To skip 0x in hex code

   486 			if (lex.Val((TUint32&)aResult, EHex) == KErrNone)

   487 				{

   488 				return ETrue;

   489 				}

   490 			}

   491 		}

   492 

   493 	return EFalse;

   494 	}

   495 

   496 

   497 /*

   498  Find variable name in sorted array, using binary search

   499  @param aVarName variable name to search for, must have any space and variable value stripped.

   500  @param aIndex output index of matching or preceeding item

   501  @return

   502  */

   503 TBool CIniSection::FindVarName(const TDesC& aVarName, TInt& aIndex)

   504 	{

   505 	// Binary Search

   506 	// left is lowest index to include, right is highest index + 1;

   507 	TInt left = 0;

   508 	TInt right = iPtrArray->Count();

   509 

   510 	while (right > left)

   511 		{

   512 		TInt middle = (left + right)>>1;

   513 		// compare to start of variable string

   514 		TPtrC cmpString = VarName(*(*iPtrArray)[middle]);

   515 		TInt cmp = aVarName.CompareF(cmpString);

   516 

   517 		if (cmp == 0)

   518 			{

   519 			aIndex = middle;

   520 			return ETrue;

   521 			}

   522 		else if (cmp > 0)

   523 			{

   524 			left = middle + 1;

   525 			}

   526 		else

   527 			{

   528 			right = middle;

   529 			}

   530 		}

   531 

   532 	aIndex = right;

   533 	return EFalse;

   534 	}

   535 

   536 void CIniSection::AddVariableL(const TDesC& aNewVariable)

   537 	{

   538 	// use variable name only for search

   539 	TPtrC varName = VarName(aNewVariable);

   540 	TInt index(0);

   541 	

   542 	// ignore duplicate definitions

   543 	if (0 == FindVarName(varName, index))

   544 		{ // insert in sorted array

   545 		HBufC* hbuf = aNewVariable.AllocLC() ;

   546 		iPtrArray->InsertL(index, hbuf);

   547 		CleanupStack::Pop(hbuf);

   548 		}

   549 	}

   550