examples/Base/BufsAndStrings/WriteToFiles/WriteToFile.cpp

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Description: 
 This example writes the text "hello world!" to a file
 Use it as the basis of all examples which depend on just E32 and F32 
*/

#include "CommonFramework.h"
#include <f32file.h>

_LIT(KFileName,"WriteToFile.dat");
_LIT(KGreetingText,"Hello World!\n");

// Do the example
static void doExampleL()
    {
                                             // The file server session.
        RFs fsSession;                           
                                                 // Connect to the file server session.
        User::LeaveIfError(fsSession.Connect()); 
        
                                                 // create the private directory
                                                 // on the writable drive
                                                 // i.e. "\private\0FFFFF00\"
                                                 // Note that the number 0FFFFF00 is the 
                                                 // process security id taken from the 2nd UID
                                                 // specified in the mmp file.

    fsSession.CreatePrivatePath(RFs::GetSystemDrive());
                                             // Set the session path to
                                             // this private directory on the writable drive
    fsSession.SetSessionToPrivate(RFs::GetSystemDrive());
                                                 
                                             // Use this object to represent
                                             // the file to be written to.
        RFile file;                                  
                                                     
        User::LeaveIfError(file.Replace(fsSession,KFileName,EFileWrite|EFileStreamText));

                
                                                     // Note that Write() requires a TDesC8
                                                     // type so we need to construct an explicit
                                                     // TDesC8 type to represent the data contained
                                                     // in the standard (16-bit) descriptor.
        TPtrC8 representation((TUint8*)(&KGreetingText)->Ptr(), (&KGreetingText)->Size());
        
                                                 // Write the text ...
        User::LeaveIfError(file.Write(representation));
                                                     
                                                 // ... and commit the text.
        User::LeaveIfError(file.Flush());
        
        _LIT(KTxt1,"Data written to file\n");
        console->Printf(KTxt1);
                                                     // Close file
        file.Close(); 
                                                     // Delete file (remove comment if you want
                                                     // to do this)
        //User::LeaveIfError(fsSession.Delete(KFileName));
        
                                                         // close file server session
        fsSession.Close(); 
        }

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