1 /*

     2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Handles log writing.

    15 *

    16 */

    17 

    18 

    19 #ifndef C_STREAMLOGGER_H

    20 #define C_STREAMLOGGER_H

    21 

    22 #include <f32file.h>  // link against efsrv.lib

    23 #include <eikenv.h>

    24 

    25 #define CERR    StreamLogger::begin()

    26 

    27 /**

    28  * usage: StreamLogger::begin()<<"your string"<<yourNumber<<...<<end;

    29  */

    30 class StreamLogger

    31     {

    32 

    33     //

    34     // internel class

    35     // use RAII instead of symbian 2 phases contruction.

    36     //

    37     class LogFile{

    38     public:

    39         LogFile()

    40             {

    41             _LIT( KLogFile, "c:\\debug.log" );

    42             RFs& fs = CEikonEnv::Static()->FsSession();

    43             if ( file.Open( fs, KLogFile, EFileWrite | EFileShareAny ) 

    44                 != KErrNone )

    45                 file.Create( fs, KLogFile, EFileWrite | EFileShareAny );

    46 

    47             TInt pos=0;  // this must be 0

    48             file.Seek( ESeekEnd, pos );

    49             }

    50 

    51         ~LogFile()

    52             {

    53             file.Close();

    54             }

    55 

    56         RFile& operator()(){ return file; }

    57     private:

    58         RFile file;

    59     };

    60 

    61 public:

    62     ~StreamLogger(){}

    63 

    64     static StreamLogger& begin(){

    65         StreamLogger* self = new (ELeave) StreamLogger;

    66         return *self;

    67     }

    68 

    69     void suicide(){ delete this; }

    70 

    71     StreamLogger& operator<<(const TDesC& aText)

    72         {

    73         LogFile file;

    74 

    75         HBufC8* text = HBufC8::NewL( aText.Length() );

    76         TPtr8 textPtr = text->Des();

    77         textPtr.Copy( aText );

    78         file().Write( *text );

    79         delete text;

    80 

    81         return *this;

    82         }

    83 

    84     StreamLogger& operator<<(TInt n)

    85         {

    86         LogFile file;

    87 

    88         TInt i=1;

    89         for(TInt v=n; v!=0; ++i, v/=10){}

    90         HBufC* text = HBufC::NewL( i );

    91         TPtr textPtr = text->Des();

    92 

    93         _LIT(KFmt, "%d");

    94         textPtr.Format( KFmt, n );

    95         HBufC8*  text8 = HBufC8::NewL( textPtr.Length() );

    96         TPtr8 textPtr8 = text8->Des();

    97         textPtr8.Copy(*text);

    98 

    99         file().Write( *text8 );

   100         delete text;

   101         delete text8;

   102 

   103         return *this;

   104         }

   105 

   106     StreamLogger& cr()

   107         {

   108         LogFile file;

   109         TBuf8<2> enter;

   110         enter.Append( 13 );

   111         enter.Append( 10 );

   112         file().Write( enter );

   113         return *this;

   114         }

   115 

   116     typedef StreamLogger& (*_Manipulator)(StreamLogger&);

   117     StreamLogger& operator<<(_Manipulator op){ return op(*this); }

   118 

   119 private:

   120     StreamLogger(){}    //disable ctor

   121 };

   122 

   123 inline StreamLogger& end(StreamLogger& self){ self.suicide(); return self; }

   124 

   125 inline StreamLogger& endl(StreamLogger& self){ self.cr(); return self; }

   126 

   127 #endif //C_STREAMLOGGER_H