fs82voldata.c

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  	   	    do
	   	    {
			*p_Dst = *p_Srce;
			p_Dst--;
			p_Srce--;

	  	   } while ( -- vl_Size > 0 );
 		}

		/* Insert on index found and buffer shifted exit loop */
		break;
	    }

	    /* Point on next entry in table */
	    pl_VolumePtr++; 
   	}

	/* Place pointer on volume in table */
	* pl_VolumePtr = pp_Vol;

	/* Increment number of volumes mounted */
	s_VolDataBaseStruct.v_NbrVolMounted++;

	/* Updates beginning index */
	s_VolDataBaseStruct.v_BeginningIndex =
			 Fs05_01DetermineDichoBeginIndex (s_VolDataBaseStruct.v_NbrVolMounted);
    }
}



/**/
/*P(***************************************************************************/
/* Procedure name : Fs82_04VDDeleteVolume     	                              */
/* Object :    Delete a volume from volume data				      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*   t_fsVolStruct * pp_Vol : pointer on volume's control block 	      */
/*						    			      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*      Deletes the volume from volume data, for this:           	      */
/*		- releases name of volume				      */
/*		- releases volume CB					      */
/*		- suppress volume in volume table index in alphabetical order */
/*		- suppress volume in table indexed in volume ID order         */
/*									      */
/*         WARNING: File and Dir structures attached to the volume are not    */
/*		   	released, this is to make before calling 	      */
/*				of this procedure			      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 4

void Fs82_04VDDeleteVolume( u16 vp_VolID, t_fsVolStruct * pp_Vol )
{
  u16 vl_IndexInTable;

    /* Suppress volume in volume table index in alphabetical order */
    {
      	/* Load address of table who is indexed by volume ID */
	t_fsVolStruct ** pl_VolumePtr = s_VolDataBaseStruct.p_VolTabIndexedByAlpha;
	u16 vl_NbrVolMounted = s_VolDataBaseStruct.v_NbrVolMounted;

	/* Search position in table */
   	for ( vl_IndexInTable = 0 ; vl_IndexInTable < vl_NbrVolMounted; vl_IndexInTable++)
   	{
	    if ( *pl_VolumePtr == pp_Vol )
	    {
		/* If it is not the last table entry, end of table is to shift */
		if ( vl_IndexInTable != vl_NbrVolMounted - 1 )
		{
		    /* End of table is to shift */
		    memcpy( pl_VolumePtr+1, pl_VolumePtr, 
			    (vl_NbrVolMounted - vl_IndexInTable - 1) * sizeof (t_fsVolStruct **));
		}

		break;
	    }
	 
	   /* point on next entry in table */
	   pl_VolumePtr++;
	}
    }

    /* Free this volume ID in table indexed by  volume ID */
    {
    	/* Load address of table who is indexed by volume ID */
    	t_fsVolStruct ** pl_VolumePtr = s_VolDataBaseStruct.p_VolTabIndexedByVolID;

    	/* Free this ID in table */
    	pl_VolumePtr[vp_VolID] = (t_fsVolStruct *) FS_VD_FREE;
    }

    /* release name of volume */
    MC_FS_FREE_MEMORY(pp_Vol->p_VolName);

    /* Release volume structure */
    MC_FS_FREE_MEMORY(pp_Vol);

    /* Decrement number of volumes mounted */
    s_VolDataBaseStruct.v_NbrVolMounted--;

    /* Updates beginning index */
    s_VolDataBaseStruct.v_BeginningIndex =
			 Fs05_01DetermineDichoBeginIndex (s_VolDataBaseStruct.v_NbrVolMounted);


}






/**/
/*P(***************************************************************************/
/* Procedure name : Fs82_05VDSearchVolByName     	                      */
/* Object :    Search a volume by its name				      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*   char * pp_VolName : Volume Name 	      				      */
/*						    			      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*     t_fsVolStruct * : Pointer on the volume's structure		      */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */
/*                                                                            */
/* Used procedures   :                                                        */
/* -------------------                                                        */
/*                                                                            */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/*                                    DESCRIPTION                             */
/*                                                                            */
/*	The volume is searched by its name via alphabetical order table	      */
/*	if volume name unknow return pointer is null			      */
/*									      */
/*----------------------------------------------------------------------------*/
/***************************************************************************)P*/
/* #*/
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 5

t_fsVolStruct * Fs82_05VDSearchVolByName( char * pp_VolName, u8 vp_MaxNameSize )
{

   /* Load address of table who is indexed by volume ID */
   t_fsVolStruct ** pl_VolumePtr = s_VolDataBaseStruct.p_VolTabIndexedByAlpha;

   u16	      	vl_NbrVol, vl_Index, vl_RestIndex;
   s32		vl_Resu;

    vl_NbrVol = s_VolDataBaseStruct.v_NbrVolMounted;

    if ( vl_NbrVol != 0 )
    {
   	vl_Index = vl_RestIndex = s_VolDataBaseStruct.v_BeginningIndex;
   
   	/* Search dichotomeus in table */
   	do
   	{
	    vl_RestIndex = vl_RestIndex >> 1;

   	    if ( vl_Index < vl_NbrVol )
	    {
	    	vl_Resu = strncmp( pl_VolumePtr[vl_Index]->p_VolName, pp_VolName, vp_MaxNameSize );

	    	if ( vl_Resu == 0 )
		{
		    /* First part of string are equal, is string in table not longer than 
			searched string */ 
		    if ( *(pl_VolumePtr[vl_Index]->p_VolName 
					+ pl_VolumePtr[vl_Index]->v_VolNameLength) == '\0' )
				/* Yes than strings are equal -> found */
		  		return ( pl_VolumePtr[vl_Index] );

		    /* String is longer point back in buffer */
		    else vl_Index = vl_Index - vl_RestIndex ;
		}
	    	else if ( vl_Resu < 0 )
			vl_Index = vl_Index + vl_RestIndex ;

	    	else vl_Index = vl_Index - vl_RestIndex ;
	    }
	    else
	    {
	    	vl_Index = vl_Index - vl_RestIndex ;
	    }

   	} while ( vl_RestIndex != 0 );
    }

    /* Like index 0 was not scanned verify it */
    vl_Resu = strncmp( pl_VolumePtr[0]->p_VolName, pp_VolName, vp_MaxNameSize );

    if ( vl_Resu == 0 )
    {
	/* First part of string are equal, is string in table not longer than 
			searched string */ 
	if ( *(pl_VolumePtr[0]->p_VolName + pl_VolumePtr[0]->v_VolNameLength) == '\0' )
		/* Yes than strings are equal -> found */
		  return ( pl_VolumePtr[0] );
    }

   /* Volume not found return NULL */
   return(NIL);
}


/**/
/*P(***************************************************************************/
/* Procedure name : Fs82_06VDInsertFileInVol                                  */
/* Object :    Insert a new file in volume's opened files		      */
/*----------------------------------------------------------------------------*/
/* Input parameters  :                                                        */
/* -------------------                                                        */
/*   t_fsVolStruct * pp_Vol : pointer on volume's control block 	      */
/*   t_fsFILE * pp_File      : Pointer on file structure		      */
/*						    			      */
/*									      */
/* Output parameters :                                                        */
/* -------------------                                                        */
/*									      */
/* Used variables    :                                                        */
/* -------------------                                                        */
/*   							                      */