--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/openenvcore/backend/src/StdioRedir/Server/inidata.cpp Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,337 @@
+// Copyright (c) 2007-2009 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:
+// Name : inidata.cpp
+// Part of : stdio server
+// To read ini file
+//
+//
+
+ #include "inidata.h"
+ #include <f32file.h>
+ #include <e32std.h>
+
+ // Default directory to look for INI file
+ _LIT(KIniFileDir,"\\System\\Data\\");
+
+
+ const TInt KTokenSize=256;
+
+ enum TIniPanic
+ {
+ ESectionNameTooBig,
+ EKeyNameTooBig,
+ };
+
+
+ ////////////////////////////////////////////////////////////////////////////////
+ void Panic(TIniPanic aPanic)
+ {
+ _LIT(CIniData,"stdioserver");
+ User::Panic(CIniData,aPanic);
+ }
+
+
+
+ CIniData::CIniData()
+ : iPtr(NULL,0)
+ /* Constructor
+ */
+ {
+ __DECLARE_NAME(_S("CIniData"));
+ }
+
+
+ CIniData::~CIniData()
+ /*Destructor.
+
+ Frees the resources located in second-phase constructor
+
+ */
+ {
+
+ delete (TText*)iPtr.Ptr();
+ delete iToken;
+ delete iName;
+ }
+
+
+ CIniData* CIniData::NewL(const TDesC& aName)
+ /*
+ Creates, and returns a pointer to CIniData object, leave on failure
+
+ @return A pointer to the CiniData object
+ */
+ {
+ CIniData* p=new(ELeave) CIniData;
+ CleanupStack::PushL(p);
+ p->ConstructL(aName);
+ CleanupStack::Pop();
+ return p;
+ }
+
+
+ void CIniData::ConstructL(const TDesC& aName)
+ /*
+ Second-phase constructor.
+
+ The function attempts to allocate a buffer and Read file's contents into iPtr
+
+ @param aName the name of the file which contains the ini data
+
+ @leave One of the system-wide error codes
+ */
+ {
+ // Allocate space for token
+ iToken=HBufC::NewL(KTokenSize+2); // 2 extra chars for [tokenName]
+
+ // Connect to file server
+ TAutoClose<RFs> fs;
+ User::LeaveIfError(fs.iObj.Connect());
+ fs.PushL();
+
+ //Add system drive to KIniFileDir with path delemiter
+ TBuf16<30> iniFilePath;
+ iniFilePath.Append(fs.iObj.GetSystemDriveChar());
+ iniFilePath.Append(TChar(KDriveDelimiter));
+ iniFilePath.Append(KIniFileDir);
+ // Find file, given name
+ TFindFile ff(fs.iObj);
+ User::LeaveIfError(ff.FindByDir(aName, iniFilePath));
+ iName=ff.File().AllocL();
+
+ // Open file
+ TAutoClose<RFile> file;
+ TInt size;
+ User::LeaveIfError(file.iObj.Open(fs.iObj,*iName,EFileStreamText|EFileShareReadersOrWriters));
+ file.PushL();
+
+ // Get file size and read in
+ User::LeaveIfError(file.iObj.Size(size));
+ TText* data=(TText*)User::AllocL(size);
+ iPtr.Set(data, size/sizeof(TText), size/sizeof(TText));
+ TPtr8 dest((TUint8*)data, 0, size);
+ User::LeaveIfError(file.iObj.Read(dest));
+ TUint8* ptr = (TUint8*)data;
+
+ //
+ // This is orderred as FEFF assuming the processor is Little Endian
+ // The data in the file is FFFE. PRR 28/9/98
+ //
+ if(size>=(TInt)sizeof(TText) && iPtr[0]==0xFEFF)
+ {
+ // UNICODE Text file so lose the FFFE
+ Mem::Copy(ptr, ptr+sizeof(TText), size-sizeof(TText));
+ iPtr.Set(data, size/sizeof(TText)-1, size/sizeof(TText)-1);
+ }
+ else if(size)
+ {
+ // NON-UNICODE so convert to UNICODE
+ TText* newdata = (TText*)User::AllocL(size*sizeof(TText));
+ iPtr.Set(newdata, size, size);
+ TInt i;
+ for(i=0 ; i<size ; ++i)
+ iPtr[i]=ptr[i];
+ delete data;
+ }
+
+ file.Pop();
+ fs.Pop();
+ }
+
+
+ ////////////////////////////////////////////////////////////////////////////////
+ //
+ // Find a key's value given a section name and a key name
+ //
+
+ TBool CIniData::FindVar(const TDesC &aSectName,const TDesC &aKeyName,TPtrC &aResult)
+ /* Find a text value from given aKeyName and aSecName in the ini data file
+
+ @param aSectName Section containing key
+ @param aKeyName Key being searched for in aSectName
+ @param aResult On return, contains the text result
+
+ @return ETrue if found, otherwise EFalse
+
+ */
+ {
+
+ __ASSERT_DEBUG(aSectName.Length()<=KTokenSize,Panic(ESectionNameTooBig));
+ __ASSERT_DEBUG(aKeyName.Length()<=KTokenSize,Panic(EKeyNameTooBig));
+
+ TInt posStartOfSection(0);
+ TInt posEndOfSection(iPtr.Length()); // Default to the entire length of the ini data
+ TPtrC SearchBuf;
+
+ // If we have a section, set pos to section start
+ TInt posI(0); // Position in internal data Buffer
+ if( aSectName.Length() > 0 )
+ {
+ TBool FoundSection(false);
+ while ( ! FoundSection )
+ {
+ // Move search buffer to next area of interest
+ SearchBuf.Set(iPtr.Mid(posI));
+
+ // Make up token "[SECTIONNAME]", to search for
+ TPtr sectionToken=iToken->Des();
+ _LIT(sectionTokenFmtString,"[%S]");
+ sectionToken.Format(sectionTokenFmtString,&aSectName);
+
+ // Search for next occurrence of aSectName
+ TInt posSB = SearchBuf.Find(sectionToken);
+
+ if (posSB==KErrNotFound)
+ return(EFalse);
+
+ // Check this is at beginning of line (ie. non-commented)
+ // ie. Check preceding char was LF
+ if(posSB>0)
+ {
+ // Create a Buffer, starting one char before found subBuf
+ TPtrC CharBefore(SearchBuf.Right(SearchBuf.Length()-posSB+1));
+ // Check first char is end of prev
+ if(CharBefore[0] == '\n')
+ {
+ FoundSection = ETrue; // found
+ posI = posI + posSB;
+ }
+ else
+ {
+ posI = posI + posSB + 1; // try again
+ }
+ }
+ else
+ {
+ FoundSection = ETrue;
+ }
+
+ } // while ( ! FoundSection )
+
+ // Set start of section, after section name, (incl '[' and ']')
+ posStartOfSection = posI + aSectName.Length() + 2;
+
+ // Set end of section, by finding begin of next section or end
+ SearchBuf.Set(iPtr.Mid(posI));
+ _LIT(nextSectionBuf,"\n[");
+ TInt posSB = SearchBuf.Find(nextSectionBuf);
+ if(posSB != KErrNotFound)
+ {
+ posEndOfSection = posI + posSB;
+ }
+ else
+ {
+ posEndOfSection = iPtr.Length();
+ }
+
+ } // if( aSectName.Length() > 0 )
+
+ // Look for key in ini file data Buffer
+ posI = posStartOfSection;
+ TBool FoundKey(false);
+ while ( ! FoundKey )
+ {
+ // Search for next occurrence of aKeyName
+ SearchBuf.Set(iPtr.Mid(posI,posEndOfSection-posI));
+ TInt posSB = SearchBuf.Find(aKeyName);
+
+ // If not found, return
+ if (posSB==KErrNotFound)
+ return(EFalse);
+
+ // Check this is at beginning of line (ie. non-commented)
+ // ie. Check preceding char was CR or LF
+ if(posSB>0)
+ {
+ // Create a Buffer, starting one char before found subBuf
+ TPtrC CharBefore(SearchBuf.Right(SearchBuf.Length()-posSB+1));
+ // Check if the first char is end of prev and also check
+ // if the token found is not a substring of another string
+ TBool beginningOK = ((CharBefore[0] == '\n') || (CharBefore[0] == ' ') || (CharBefore[0] == '\t'));
+ TBool endingOK = ((CharBefore[aKeyName.Length()+1] == '=') || (CharBefore[aKeyName.Length()+1] == ' ') ||
+(CharBefore[aKeyName.Length()+1] == '\t'));
+ if (beginningOK && endingOK)
+ {
+ FoundKey = ETrue;
+ posI = posI + posSB;
+ }
+ else
+ {
+ posI = posI + posSB + 1;
+ }
+ }
+ else
+ {
+ FoundKey = ETrue;
+ }
+ } // while ( ! FoundKey )
+
+// Set pos, to just after '=' sign
+SearchBuf.Set(iPtr.Mid(posI));
+TInt posSB = SearchBuf.Locate('=');
+if(posSB==KErrNotFound) // Illegal format, should flag this...
+ return(EFalse);
+
+// Identify start and end of data (EOL or EOF)
+posI = posI + posSB + 1; // 1 char after '='
+TInt posValStart = posI;
+TInt posValEnd;
+SearchBuf.Set(iPtr.Mid(posI));
+posSB = SearchBuf.Locate('\r');
+if(posSB!=KErrNotFound)
+ {
+ posValEnd = posI + posSB;
+ }
+else
+ {
+ posValEnd = iPtr.Length();
+ }
+
+// Check we are still in the section requested
+if( aSectName.Length() > 0 )
+ {
+ if( posValEnd > posEndOfSection )
+ {
+ return(EFalse);
+ }
+ }
+// Parse Buffer from posn of key
+// Start one space after '='
+TLex lex(iPtr.Mid(posValStart, posValEnd-posValStart));
+lex.SkipSpaceAndMark(); // Should be at the start of the data
+aResult.Set(lex.MarkedToken().Ptr(),posValEnd-posValStart - lex.Offset() );
+return(ETrue);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+TBool CIniData::FindVar(const TDesC &aSection,const TDesC &aKeyName,TInt &aResult)
+/* Find an integer value from given aKeyName and aSecName in the ini data file
+
+@param aSectName Section containing key
+@param aKeyName Key being searched for in aSectName
+@param aResult On return, contains TInt result
+
+@return ETrue if found, otherwise EFalse
+
+*/
+{
+TPtrC ptr(NULL,0);
+if (FindVar(aSection,aKeyName,ptr))
+ {
+ TLex lex(ptr);
+ if (lex.Val(aResult)==KErrNone)
+ return(ETrue);
+ }
+return(EFalse);
+}