[Qt-interest] How t o use sqlite3_create_collation_v2() API in QTapplication

[Scott Aron Bloom]

Looks like a null pointer is being dereferenced...  

________________________________

From: ashish yadav [mailto:ashishyadav78 at gmail.com]
Sent: Sun 1/30/2011 9:53 PM
To: Scott Aron Bloom
Cc: qt-interest at trolltech.com
Subject: Re: [Qt-interest] How t o use sqlite3_create_collation_v2() API in QTapplication


Hi Scott,

Please find the out put of gdb :

Starting program: /home/ashish/Desktop/sorting/code/code 
warning: Lowest section in /usr/lib/libicudata.so.38 is .hash at 000000d4
[Thread debugging using libthread_db enabled]
[New Thread 0xb57416d0 (LWP 5103)]
[New Thread 0xb56c5b90 (LWP 5106)]
[Thread 0xb56c5b90 (LWP 5106) exited]
Data Base Connected.
Able to  get Sqlite3 driver handle. 
going for sqlite3_create_collation_v2
 

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb57416d0 (LWP 5103)]
0x00000000 in ?? ()
(gdb) backtrace
#0  0x00000000 in ?? ()
#1  0xb69bb508 in sqlite3_create_collation_v2 (db=0x8b0f528, zName=0x804e14b "ENGLISH", enc=4, pCtx=0x8b1da48, 
    xCompare=0x8049ab0 <Bosch_icuCollationColl(void*, int, void const*, int, void const*)>, 
    xDel=0x8049aa0 <Bosch_icuCollationDel(void*)>) at sqlite3.c:90603
#2  0x0804caca in main ()
(gdb) 





Thanks & Regards
        Ashish 


On Sat, Jan 29, 2011 at 10:39 PM, Scott Aron Bloom <Scott.Bloom at onshorecs.com> wrote:


	When you step in with  debugger..          whats the problem?

	 

	From: qt-interest-bounces+scott.bloom=onshorecs.com <http://onshorecs.com/> @qt.nokia.com <http://qt.nokia.com/>  [mailto:qt-interest-bounces+scott.bloom <mailto:qt-interest-bounces%2Bscott.bloom> =onshorecs.com <http://onshorecs.com/> @qt.nokia.com <http://qt.nokia.com/> ] On Behalf Of ashish yadav
	Sent: Saturday, January 29, 2011 8:07 AM
	To: qt-interest at trolltech.com
	Subject: [Qt-interest] How t o use sqlite3_create_collation_v2() API in QTapplication

	 

	Hi ,
	
	I am trying to use sqlite3_create_collation_v2() in QT application, but it give Segmentation fault when application try to access this function.
	
	The part of code which i use for this :
	/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	QSqlDatabase db = QSqlDatabase::addDatabase( "QSQLITE" );
	
	  db.setDatabaseName( "./testdatabase.db" );
	
	  if( !db.open() )
	  {
	     qDebug() << db.lastError();
	     qFatal( "Failed to connect." );
	     exit(1); 
	  }
	
	  qDebug("Data Base Connected.");
	
	  QVariant v = db.driver()->handle();    
	  if (v.isValid() && strcmp(v.typeName(), "sqlite3*") == 0)    
	  {
	     // v.data() returns a pointer to the handle    
	     sqlite3 *handle = *static_cast<sqlite3 **>(v.data());    
	     if (handle != 0)
	     {  // check that it is not NULL
	        qDebug() << "Able to  get Sqlite3 driver handle.";
	
	        int rc ;
	         
	        UCollator *pUCollator;    
	        UErrorCode status = U_ZERO_ERROR;
	        
	        pUCollator = ucol_open("en_EN", &status);
	     
	        if( U_FAILURE(status) )
	        {
	           qDebug() << "Error in ucol_open\n";
	           return 0;
	        } 
	       
	        qDebug() << "going for sqlite3_create_collation_v2\n";
	
	        rc = sqlite3_create_collation_v2(handle,"ENGLISH", SQLITE_UTF16, (void *)pUCollator,            
	                 icuCollationColl, icuCollationDel ); 
	
	        if( rc!=SQLITE_OK )
	        {
	           ucol_close(pUCollator);
	           qDebug() << "Error registering collation function" ;
	        }
	
	     }   
	     else 
	     {
	        qDebug() << "Could not get sqlite Driver handle.";
	        db.close();
	        exit(1);           
	     }
	
	  }    
	  else
	  {
	     qDebug() << "Not vaild handle variant returned." ; 
	     db.close();
	     exit(1);
	  }
	
	
	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	
	I also define/declare  icuCollationColl & icuCollationDel  function ..
	Now when i run this application , its give Segmentation fault :
	./code
	Data Base Connected.
	Able to  get Sqlite3 driver handle. 
	going for sqlite3_create_collation_v2
	 
	Segmentation fault
	
	
	Can any one please help me to resolve this issue ? 
	Please give me your suggestion , it will be help full to  resolve this issue. 
	
	Thanks & Regards
	    Ashish


	_______________________________________________
	Qt-interest mailing list
	Qt-interest at qt.nokia.com
	http://lists.qt.nokia.com/mailman/listinfo/qt-interest
	
	


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.qt-project.org/pipermail/qt-interest-old/attachments/20110130/bd3f8fb8/attachment.html