Re: [CCMC] OSx

[iSolutions - Francis Vermeire]

C y b e r M a c @ E x M a c h i n a ( M a i l i n g   L i s t )
<http://www.cybercafe21.net> & <http://www.cybercafe21.tv>

>Tu rigoles ! :-)

Non, comme tu peux le constater ici (notion de metadata) :

int main(void)
{
     OSStatus    outStatus;
     FSSpec      spec;
     FSRef       folderRef;

     printf("begin file iteration!\n");
     fflush( stdout );

     //
     // Get the currently running application's parent folder,
     // make it into an FSRef, and iterate it
     //
     outStatus = FSMakeFSSpec( 0, 0, "\p", &spec );
     if( outStatus == noErr )
     {
         outStatus = FSpMakeFSRef( &spec, &folderRef );
         if( outStatus == noErr )
         {
             outStatus = IterateFolder( &folderRef );
         }
     }

     printf( "final error status is (#%d)\n", outStatus );
     return 0;
}

OSStatus IterateFolder( FSRef * inFolder )
{
     OSStatus    outStatus;

     //
     // Get permissions and node flags and Finder info
     //
     // For maximum performance, specify in the catalog
     // bitmap only the information you need to know
     //
     FSCatalogInfoBitmap     kCatalogInfoBitmap = (      kFSCatInfoNodeFlags
                                                     |   kFSCatInfoFinderInfo
                                                  );

     //
     // On each iteration of the do-while loop, retrieve this
     // number of catalog infos
     //
     // We use the number of FSCatalogInfos that will fit in
     // exactly four VM pages (#113). This is a good balance
     // between the iteration I/O overhead and the risk of
     // incurring additional I/O from additional memory
     // allocation
     //
     const size_t            kRequestCountPerIteration =
                                                 ((4096 * 4) /
sizeof(FSCatalogInfo));
     FSIterator              iterator;
     FSCatalogInfo *         catalogInfoArray;

     //
     // Create an iterator
     //
     outStatus = FSOpenIterator( inFolder, kFSIterateFlat, &iterator );

     if( outStatus == noErr )
     {
         //
         // Allocate storage for the returned information
         //
         catalogInfoArray = (FSCatalogInfo *) malloc( sizeof(FSCatalogInfo)
                                                     *
kRequestCountPerIteration );

         if( catalogInfoArray == NULL )
         {
             outStatus = memFullErr;
         }
         else
         {
             //
             // Request information about files in the given directory,
             // until we get a status code back from the File Manager
             //
             do
             {
                 ItemCount   actualCount;

                 outStatus = FSGetCatalogInfoBulk(   iterator,
                                                     kRequestCountPerIteration,
                                                     &actualCount,
                                                     NULL,
                                                     kCatalogInfoBitmap,
                                                     catalogInfoArray,
                                                     NULL,
                                                     NULL,
                                                     NULL );

                 //
                 // Process all items received
                 //
                 if( outStatus == noErr || outStatus == errFSNoMoreItems )
                 {
                     UInt32  index;

                     for( index = 0; index < actualCount; index += 1 )
                     {
                         //
                         // Do something interesting with the object found
                         //
                         DoSomethingWithThisObject( &catalogInfoArray[
index ] );
                     }
                 }


             }
             while( outStatus == noErr );

             //
             // errFSNoMoreItems tells us we have successfully processed all
             // items in the directory -- not really an error
             //
             if( outStatus == errFSNoMoreItems )
             {
                 outStatus = noErr;
             }

             //
             // Free the array memory
             //
             free( (void *) catalogInfoArray );
         }
     }

     return outStatus;
}

void DoSomethingWithThisObject( const FSCatalogInfo * inCatInfo )
{
     if( (inCatInfo->nodeFlags & kFSNodeIsDirectoryMask) ==
kFSNodeIsDirectoryMask )
     {
         printf( "Found a folder\n" );
     }
     else
     {
         FInfo *     theFinderInfo;
         OSType      type;

         theFinderInfo   = (FInfo *)&inCatInfo->finderInfo[0];
         type            = theFinderInfo->fdType;

         printf( "Found a file (type %c%c%c%c)\n",
                 (char) ((type & 0xFF000000) >> 24),
                 (char) ((type & 0x00FF0000) >> 16),
                 (char) ((type & 0x0000FF00) >> 8),
                 (char) (type & 0x000000FF)
                  );
     }
}


Bonne lecture

        FranciscoSan

--

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