--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/codhandler/codeng/inc/FileExt.h	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,248 @@
+/*
+* Copyright (c) 2002-2004 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:  Extension to RFile class to load custom data from file.
+*
+*/
+
+
+
+#ifndef RFILEEXT_H
+#define RFILEEXT_H
+
+//  INCLUDES
+#include <e32base.h>
+#include <f32file.h>
+
+// CONSTANTS
+
+// MACROS
+#define MIN( a, b ) ( (a) < (b) ? (a) : (b) )
+#define MAX( a, b ) ( (a) > (b) ? (a) : (b) )
+
+
+#define APPEND_BUF_INT( buf, a ) { buf.Append( (TUint8*)&(a), sizeof(a) ); }
+
+#define READ_INT_L( fs, a ) { TPtr8 buf( (TUint8*)&(a), sizeof(a) ); \
+                              User::LeaveIfError( fs.Read( buf ) ); \
+                              if( buf.Length() != sizeof(a) ) \
+                                {   \
+                                User::Leave( KErrEof ); \
+                                }   \
+                          }
+
+#define READ_CUST_L( fs, a ) { TPtr8 buff( (TUint8*)&(a), sizeof(a) ); \
+                               fs.Read( buff, sizeof(a) ); \
+                               if( buff.Length() == 0 ) \
+                                    { \
+                                    User::Leave( KErrEof ); \
+                                    } \
+                            }
+
+// indicates that the passed HBufC(8)* pointer is/was NULL
+const TInt KNullBuffer = -1;
+
+inline void ReadHBufCL( RFile& aInFile, HBufC* &aBuf )
+    {
+    TInt length;
+
+    delete aBuf;
+    aBuf = NULL;
+
+    // read length of the buffer
+    READ_INT_L( aInFile, length );
+
+    if( length > 10*1024 )
+        // we surely didn't have so huge block
+        {
+        User::Leave( KErrCorrupt );
+        }
+
+    if( length != KNullBuffer )
+        {
+        aBuf = HBufC::NewL( length / 2 );   // byte -> dbyte
+        if( length )
+            {
+            TPtr8 buf( (TUint8*)aBuf->Ptr(), length );
+
+            User::LeaveIfError( aInFile.Read( buf, length ) );
+
+            if( buf.Length() == length )
+                {
+                aBuf->Des().SetLength( length / 2 );
+                }
+            else
+                // couldn't read enough byte -> eof
+                {
+                delete aBuf;
+                aBuf = NULL;
+
+                User::Leave( KErrEof );
+                }
+            }
+        }
+    }
+
+inline void ReadHBufCL( RFile& aInFile, HBufC8* &aBuf )
+    {
+    TInt length;
+
+    delete aBuf;
+    aBuf = NULL;
+
+    // read length of the buffer
+    READ_INT_L( aInFile, length );
+
+    if( length > 10*1024 )
+        // we surely didn't have so huge block
+        {
+        User::Leave( KErrCorrupt );
+        }
+
+    if( length != KNullBuffer )
+        {
+        aBuf = HBufC8::NewL( length );   // byte -> dbyte
+        if( length )
+            {
+            TPtr8 buf( (TUint8*)aBuf->Ptr(), length );
+
+            User::LeaveIfError( aInFile.Read( buf, length ) );
+
+            if( buf.Length() == length )
+                {
+                aBuf->Des().SetLength( length );
+                }
+            else
+                // couldn't read enough byte -> eof
+                {
+                delete aBuf;
+                aBuf = NULL;
+
+                User::Leave( KErrEof );
+                }
+            }
+        }
+    }
+
+/**
+ * Appends data and data length info to buffer
+ * @param aDest destinaion buffer
+ * @param aSrc  source of data
+ * @return None. Leaves on error.
+ */
+void AppendBufL( TPtr8& aDest, HBufC* aSrc );
+
+/**
+ * Appends data and data length info to buffer
+ * @param aDest destinaion buffer
+ * @param aSrc  source of data
+ * @return None. Leaves on error.
+ */
+void AppendBufL( TPtr8& aDest, HBufC8* aSrc );
+
+inline void ReallocateStringL( HBufC* &aBuff, const TDesC& aValue, TInt aMaxSize = 0 )
+    {
+    delete aBuff;
+    aBuff = NULL;
+    TInt min;
+    TInt max;
+
+    if( aMaxSize )
+        {
+        min = MIN( aValue.Length(), aMaxSize );
+        max = MAX( aValue.Length(), aMaxSize );
+        }
+    else
+        {
+        min = aValue.Length();
+        max = aValue.Length();
+        }
+    
+    aBuff = HBufC::NewL( max );
+    aBuff->Des().Copy( aValue );
+    aBuff->Des().SetLength( min );
+    }
+
+inline void ReallocateStringL( HBufC8* &aBuff, const TDesC8& aValue, TInt aMaxSize = 0 )
+    {
+    delete aBuff;
+    aBuff = NULL;
+    TInt min;
+    TInt max;
+
+    if( aMaxSize )
+        {
+        min = MIN( aValue.Length(), aMaxSize );
+        max = MAX( aValue.Length(), aMaxSize );
+        }
+    else
+        {
+        min = aValue.Length();
+        max = aValue.Length();
+        }
+    
+    aBuff = HBufC8::NewL( max );
+    aBuff->Des().Copy( aValue );
+    aBuff->Des().SetLength( min );
+    }
+
+inline void ReallocateStringL( HBufC8* &aBuff, const TDesC& aValue, TInt aMaxSize = 0 )
+    {
+    delete aBuff;
+    aBuff = NULL;
+    TInt min;
+    TInt max;
+
+    if( aMaxSize )
+        {
+        min = MIN( aValue.Length(), aMaxSize );
+        max = MAX( aValue.Length(), aMaxSize );
+        }
+    else
+        {
+        min = aValue.Length();
+        max = aValue.Length();
+        }
+    
+    aBuff = HBufC8::NewL( max );
+    aBuff->Des().Copy( aValue );
+    aBuff->Des().SetLength( min );
+    }
+
+inline void ReallocateStringL( HBufC* &aBuff, const TDesC8& aValue, TInt aMaxSize = 0 )
+    {
+    delete aBuff;
+    aBuff = NULL;
+    TInt min;
+    TInt max;
+
+    if( aMaxSize )
+        {
+        min = MIN( aValue.Length(), aMaxSize );
+        max = MAX( aValue.Length(), aMaxSize );
+        }
+    else
+        {
+        min = aValue.Length();
+        max = aValue.Length();
+        }
+    
+    aBuff = HBufC::NewL( max );
+    aBuff->Des().Copy( aValue );
+    aBuff->Des().SetLength( min );
+    }
+
+
+#endif      // RFILEEXT_H
+            
+// End of File