mfm80mngtdirfile.c

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	    /* If type of object is to place in destination buffer made it */
	    if ( ( ( vl_TypeOfObj == FS_OBJECT_DIR ) && ( vp_Which.v_TypeOfObj & FM_OBJ_DIR ))
						    ||
		 (  ( vl_TypeOfObj == FS_OBJECT_FILE ) && ( vp_Which.v_TypeOfObj & FM_OBJ_FILE ))
	       )
	    {
	    	if ( vp_Which.v_InfoType == FM_NAME )
 	    	{
 
		    /* If enough place in destination buffer copy name in it */
		    if ( vp_SizeOfDestBuff >= vl_NameLength+1 )
		    {
		    	/* Copy name in destination buffer */
    	    	    	strncpy( pl_DestBuffPtr, &pl_ReadBuffPtr[FM_SIZE_OF_OBJ_ID], vp_SizeOfDestBuff ); 

		    	/* Point in rest of destination buffer and update remaining buffer size */
		    	pl_DestBuffPtr += vl_NameLength + 1;
		    	vp_SizeOfDestBuff -= vl_NameLength + 1;

			/* Increment number of elements read */
			vl_NbrElemRead++;

		    	/* Request to point on next element in directory file */
		    	vl_PointNextReq = TRUE;
		    }
		         /* Buffer full exit */
		    else vl_ExitReq = TRUE;
	    	}
	    	else
	    	{
		    /* if enough place copy file ID in destination buffer */
		    if ( vp_SizeOfDestBuff >= sizeof(s32) )
		    {
			register u16 * pl_U16 = (u16*) pl_DestBuffPtr;

		    	/* Copy ID in destination buffer */
		    	*pl_U16 = vl_IDType;
			/*	printf ( "\n ID is : %d" , vl_IDType);*/

		    	/* Point in rest of destination buffer and update remaining buffer size */
			pl_U16++;
		    	pl_DestBuffPtr =  (ascii*) pl_U16;
		    	vp_SizeOfDestBuff -= sizeof(u16);

			/* Increment number of elements read */
			vl_NbrElemRead++;

		    	/* Request to point on next element in directory file */
		    	vl_PointNextReq = TRUE;
		    }

		         /* Buffer full exit */
		    else vl_ExitReq = TRUE;

	    	}
	    }
	    else /* Request to point on next element in directory file */
		vl_PointNextReq = TRUE;


	    if ( vl_PointNextReq )
	    {
    	    	/* Update position in directory context */
    	    	pp_DirCtx->v_Position += vl_NameLength + FM_SIZE_OF_OBJ_ID + 1;
		pl_ReadBuffPtr += vl_NameLength + FM_SIZE_OF_OBJ_ID + 1;

    	    	/* If position point at end of file set end of file flag else update index */
    	    	if ( pp_DirCtx->v_Position >= pp_DirCtx->v_FileSize )
		{
		    pp_DirCtx->v_EndOfFile = TRUE;

		    /* End of file reached -> exit */
		    vl_ExitReq = TRUE;
		}

		/* Clear request flag */
		vl_PointNextReq = FALSE;
	    }

	    /* If enough elements read exit */
	    if ( vl_NbrElemRead >= vp_NbrElemToRead ) vl_ExitReq = TRUE;

	} while ( !vl_ExitReq );

    } while ( !vl_ExitReq );

    /* Return number of elements read */
    return ( vl_NbrElemRead );
}



#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 5
void mFm80_05InsertObjInDir( u16 vp_DirId, u16 vp_ObjId,  ascii * pp_ObjName, u8 vp_NameLenght,
				 u8 vp_TypeOfObj, t_DirFileInfo * sp_DirFileInfo, 
				t_mFmLayerContext * pp_LayerCtx, s32 * pp_Status)
{
  /* Final file size is: Size of header + size of name + size of '\0' */
  u32 vl_EntryLenght = FM_SIZE_OF_OBJ_HEADER + vp_NameLenght + 1;
  u16 vl_IDType;
  ascii al_StrIDType[2];

  /* Update Id type */
  if ( vp_TypeOfObj == FS_OBJECT_DIR ) vl_IDType = vp_ObjId  | FM_MASK_OBJ_TYPE_DIR;
  else vl_IDType = vp_ObjId;

  /* Encode Type ID ( to avoid mismatch with '\0' character from end of string */
  vl_IDType = mFm80_01Encode(vl_IDType);

  /* Place ID type of obj on buffer to write */
  al_StrIDType[0] = vl_IDType>>8;
  al_StrIDType[1] = vl_IDType & 0xff;

  /* Insert new object in dir file for this:
		- Write in same place beginning of file until insert index
		- write type of object and object ID 
		- write name of object 
		- write rest of file 
  */


    {
      t_WriteHeader	sl_WriteHeader;
      t_WriteCmdStruct3 sl_CmdSet;

	/* Initialize write header */
    	sl_WriteHeader.v_FinalFileSize = sp_DirFileInfo->v_FileSize + vl_EntryLenght;
    	sl_WriteHeader.v_DestFileId = vp_DirId;
	sl_WriteHeader.p_NextWriteCmdHeader = (t_WriteCmdHeader*)&sl_CmdSet;

			
    	/* Begin initialization of write command header */
	sl_CmdSet.s_WriteCmdHeader.p_NextWriteCmdHeader = NIL;
	sl_CmdSet.s_WriteCmdHeader.v_OffsetInFile = 0;

			
	/* Write header ( obj ID + ....) */
    	sl_CmdSet.s_WriteCmd[0].v_TypeOfCmd = FS_SRC_ADR_DST_INDEX;
    	sl_CmdSet.s_WriteCmd[0].v_SizeCopied = 0;
    	sl_CmdSet.s_WriteCmd[0].v_Size = FM_SIZE_OF_OBJ_HEADER;
    	sl_CmdSet.s_WriteCmd[0].u_Srce.p_Srce = &al_StrIDType[0];
    	sl_CmdSet.s_WriteCmd[0].u_Dest.v_DestIndex = sp_DirFileInfo->v_PositionInFile; 
    	sl_CmdSet.s_WriteCmd[0].v_SrceFileId = vp_DirId;

	/* Write name of object */
    	sl_CmdSet.s_WriteCmd[1].v_TypeOfCmd = FS_SRC_ADR_DST_INDEX;
    	sl_CmdSet.s_WriteCmd[1].v_SizeCopied = 0;
    	sl_CmdSet.s_WriteCmd[1].v_Size = vp_NameLenght+1;
    	sl_CmdSet.s_WriteCmd[1].u_Srce.p_Srce = pp_ObjName;
    	sl_CmdSet.s_WriteCmd[1].u_Dest.v_DestIndex = sp_DirFileInfo->v_PositionInFile 
								+ FM_SIZE_OF_OBJ_HEADER; 
    	sl_CmdSet.s_WriteCmd[1].v_SrceFileId = vp_DirId;

	/* If insertion not at end of file write rest of file */
	if ( sp_DirFileInfo->v_FileSize - sp_DirFileInfo->v_PositionInFile != 0 )
	{
    	    sl_CmdSet.s_WriteCmd[2].v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
    	    sl_CmdSet.s_WriteCmd[2].v_SizeCopied = 0;
    	    sl_CmdSet.s_WriteCmd[2].v_Size = sp_DirFileInfo->v_FileSize - 
								sp_DirFileInfo->v_PositionInFile;
    	    sl_CmdSet.s_WriteCmd[2].u_Srce.v_SrceIndex = sp_DirFileInfo->v_PositionInFile;
    	    sl_CmdSet.s_WriteCmd[2].u_Dest.v_DestIndex = sp_DirFileInfo->v_PositionInFile
						 			+ vl_EntryLenght;
    	    sl_CmdSet.s_WriteCmd[2].v_SrceFileId = vp_DirId;


	    sl_CmdSet.s_WriteCmdHeader.v_NbrCmds = 3;
	}
	else  sl_CmdSet.s_WriteCmdHeader.v_NbrCmds = 2;

    	/* Makes write in device */
	MC_MFM_LL_WRITE_COMPLEX( &sl_WriteHeader, pp_Status );

    	/* If status not OK return */
    	if ( *pp_Status != FS_OK) return;
    }

   /* Directory content have change update all contextes opened for the same directory */
   mFm80_08CorrectDirCtx( FM_INSERT, vp_DirId, pp_LayerCtx, 0, 0,
				sp_DirFileInfo->v_PositionInFile, vl_EntryLenght);
}


#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 6
void mFm80_06RemoveObjFromDir( u16 vp_DirId, t_DirFileInfo * sp_DirFileInfo, 
					t_mFmLayerContext * pp_LayerCtx, s32 * pp_Status )
{
   t_WriteHeader	sl_WriteHeader;
   t_WriteCmdStruct1 	sl_CmdSet;

    /* Initialize write header */
    sl_WriteHeader.v_FinalFileSize = sp_DirFileInfo->v_FileSize 
							-
					 sp_DirFileInfo->v_EntryLenght;

    sl_WriteHeader.v_DestFileId = vp_DirId;
    sl_WriteHeader.p_NextWriteCmdHeader = (t_WriteCmdHeader*)&sl_CmdSet;


    /* Is this entry the last of the file ? */
    if ( sp_DirFileInfo->v_PositionInFile != sl_WriteHeader.v_FinalFileSize  )
    {
	/* Update write command header */
    	sl_CmdSet.s_WriteCmdHeader.v_NbrCmds = 1;
	sl_CmdSet.s_WriteCmdHeader.p_NextWriteCmdHeader = NIL;
	sl_CmdSet.s_WriteCmdHeader.v_OffsetInFile = 0;

	/* Update command */
    	sl_CmdSet.s_WriteCmd[0].v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
    	sl_CmdSet.s_WriteCmd[0].v_SizeCopied = 0;
    	sl_CmdSet.s_WriteCmd[0].v_Size = sp_DirFileInfo->v_FileSize
				 		- sp_DirFileInfo->v_EntryLenght 
						- sp_DirFileInfo->v_PositionInFile;
    	sl_CmdSet.s_WriteCmd[0].u_Srce.v_SrceIndex = sp_DirFileInfo->v_PositionInFile
						 + sp_DirFileInfo->v_EntryLenght;

    	sl_CmdSet.s_WriteCmd[0].u_Dest.v_DestIndex = sp_DirFileInfo->v_PositionInFile; 
    	sl_CmdSet.s_WriteCmd[0].v_SrceFileId = vp_DirId;
   }
   else
	/* Number of commands is nul but size of file change */
    	sl_WriteHeader.p_NextWriteCmdHeader = NIL;

   /* Write it via lower layers */ 
   MC_MFM_LL_WRITE_COMPLEX( &sl_WriteHeader, pp_Status );

   /* If status not OK return */
   if ( *pp_Status != FS_OK) return;

   /* Directory content have change update all contextes opened for the same directory */
   mFm80_08CorrectDirCtx( FM_DELETE, vp_DirId, pp_LayerCtx, sp_DirFileInfo->v_PositionInFile, 
						sp_DirFileInfo->v_EntryLenght, 0, 0 );
}

/* In a single command erase old entry and insert the new */
#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 7
void mFm80_07RenameObjFromDir( u16 vp_DirId, t_DirFileInfo * pp_DelDirFileInfo, 
				t_DirFileInfo * pp_InsDirFileInfo, ascii * pp_ObjName, 
				u8 vp_NameLenght, t_mFmLayerContext * pp_LayerCtx, s32 * pp_Status )
{
   s32 vl_InsEntryLenght = vp_NameLenght + FM_SIZE_OF_OBJ_HEADER + 1;
   t_WriteHeader	sl_WriteHeader;
   t_WriteCmdStruct4 	sl_CmdSet;

    /* Initialize write header */
    sl_WriteHeader.v_FinalFileSize = pp_DelDirFileInfo->v_FileSize 
							-
				 pp_DelDirFileInfo->v_EntryLenght + vl_InsEntryLenght;

    sl_WriteHeader.v_DestFileId = vp_DirId;
    sl_WriteHeader.p_NextWriteCmdHeader = (t_WriteCmdHeader*)&sl_CmdSet;

    /* Update write command header */
    sl_CmdSet.s_WriteCmdHeader.v_NbrCmds = 2;  /* Write of inserted entry is always made */
    sl_CmdSet.s_WriteCmdHeader.p_NextWriteCmdHeader = NIL;
    sl_CmdSet.s_WriteCmdHeader.v_OffsetInFile = 0;

    {
      s32 vl_DestPos;
      s32 vl_Distance;
      t_WriteCmd * pl_WriteCmd1;
      t_WriteCmd * pl_WriteCmd2;
      u8 vl_CmdNo;

    	/* Generates insertion of new entry in file */
    	/*------------------------------------------*/
    	/* Determine position of command ( if deleted entry is before and not adjacent then 
					it is the second command ) */
	vl_Distance = pp_InsDirFileInfo->v_PositionInFile - pp_DelDirFileInfo->v_PositionInFile;

	/* Calculate destination position of entry */
	vl_DestPos = pp_InsDirFileInfo->v_PositionInFile;
    	if (vl_Distance > 0 ) vl_DestPos = vl_DestPos - pp_DelDirFileInfo->v_EntryLenght;
	
	/* Determine position of command in command set */
    	if (vl_Distance > pp_DelDirFileInfo->v_EntryLenght ) pl_WriteCmd1 = &sl_CmdSet.s_WriteCmd[1];
	else pl_WriteCmd1 = &sl_CmdSet.s_WriteCmd[0];

	/* Write header ( It is the same that the deleted object ) */
    	pl_WriteCmd1->v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
    	pl_WriteCmd1->v_Size = FM_SIZE_OF_OBJ_HEADER;
    	pl_WriteCmd1->u_Srce.v_SrceIndex = pp_DelDirFileInfo->v_PositionInFile;
    	pl_WriteCmd1->u_Dest.v_DestIndex = vl_DestPos; 

	/* Write name of object */
	pl_WriteCmd1++;
    	pl_WriteCmd1->v_TypeOfCmd = FS_SRC_ADR_DST_INDEX;
    	pl_WriteCmd1->v_Size = vp_NameLenght+1;
    	pl_WriteCmd1->u_Srce.p_Srce = pp_ObjName;
    	pl_WriteCmd1->u_Dest.v_DestIndex = vl_DestPos+ FM_SIZE_OF_OBJ_HEADER; 

	
    	/* Generates write command of old data beetween deleted and inserted entry and of data	     */
	/*				after last entry					     */
    	/*-------------------------------------------------------------------------------------------*/
    	if ( vl_Distance > pp_DelDirFileInfo->v_EntryLenght )
    	{
    	    /* The deleted entry is before the inserted entry */

    	    /* Generates the first write command of data between deleted and inserted entry */
	    pl_WriteCmd1 = &sl_CmdSet.s_WriteCmd[0];
    	    pl_WriteCmd1->v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
   	    pl_WriteCmd1->u_Dest.v_DestIndex  = pp_DelDirFileInfo->v_PositionInFile;
   	    pl_WriteCmd1->u_Srce.v_SrceIndex = pp_DelDirFileInfo->v_PositionInFile 
							+ pp_DelDirFileInfo->v_EntryLenght;
	    pl_WriteCmd1->v_Size = pp_InsDirFileInfo->v_PositionInFile 
					- pp_DelDirFileInfo->v_PositionInFile
					- pp_DelDirFileInfo->v_EntryLenght;
	    sl_CmdSet.s_WriteCmdHeader.v_NbrCmds ++;

    	    /* Generates the second write command of data after inserted entity ( if exist ) */
	    pl_WriteCmd2 = &sl_CmdSet.s_WriteCmd[3];

	    pl_WriteCmd2->v_Size = pp_InsDirFileInfo->v_FileSize - pp_InsDirFileInfo->v_PositionInFile;
	    if ( pl_WriteCmd2->v_Size != 0 )
	    {
		sl_CmdSet.s_WriteCmdHeader.v_NbrCmds++;
    		pl_WriteCmd2->v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
   	    	pl_WriteCmd2->u_Srce.v_SrceIndex = pp_InsDirFileInfo->v_PositionInFile;
   	    	pl_WriteCmd2->u_Dest.v_DestIndex = pl_WriteCmd1->u_Dest.v_DestIndex + 
					pl_WriteCmd1->v_Size + vl_InsEntryLenght;
	    }
    	}
    	else
    	{
	    /* The deleted entry is after or at same position that the inserted entity */

	    /* Are insert and delete entries not at same position ? */ 
	    if ( vl_Distance < 0 )
	    {
	    	/* The deleted entry is after the inserted entry */

    	      	/* Generates the first write command of data between deleted and inserted entry */
		pl_WriteCmd1 = &sl_CmdSet.s_WriteCmd[2];
		sl_CmdSet.s_WriteCmdHeader.v_NbrCmds++;
    		pl_WriteCmd1->v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
   	    	pl_WriteCmd1->u_Srce.v_SrceIndex = pp_InsDirFileInfo->v_PositionInFile;
   	    	pl_WriteCmd1->u_Dest.v_DestIndex = pp_InsDirFileInfo->v_PositionInFile 
								+ vl_InsEntryLenght;
	    	pl_WriteCmd1->v_Size = pp_DelDirFileInfo->v_PositionInFile 
					- pp_InsDirFileInfo->v_PositionInFile;

    	    	/* Generates the second write command of data after inserted entity ( if exist ) */
		pl_WriteCmd2 = &sl_CmdSet.s_WriteCmd[3];
   	    	pl_WriteCmd2->u_Dest.v_DestIndex = pl_WriteCmd1->u_Dest.v_DestIndex 
							+ pl_WriteCmd1->v_Size;
	    	pl_WriteCmd2->v_Size = sl_WriteHeader.v_FinalFileSize 
						- pl_WriteCmd2->u_Dest.v_DestIndex;
		if ( pl_WriteCmd2->v_Size != 0 )
		{
		    sl_CmdSet.s_WriteCmdHeader.v_NbrCmds++;
    		    pl_WriteCmd2->v_TypeOfCmd = FS_SRC_INDEX_DST_INDEX;
   	    	    pl_WriteCmd2->u_Srce.v_SrceIndex = pp_DelDirFileInfo->v_FileSize 
								- pl_WriteCmd2->v_Size;
		}
	    }
	    else
	    {
	    	/* The deleted entry is at same position that the inserted entity */

    	    	/* Generates a single write command of data after inserted entity ( if exist ) */
		pl_WriteCmd1 = &sl_CmdSet.s_WriteCmd[2];
		
   	    	pl_WriteCmd1->u_Srce.v_SrceIndex = pp_DelDirFileInfo->v_PositionInFile 
					+ pp_DelDirFileInfo->v_EntryLenght;
   	    	pl_WriteCmd1->u_Dest.v_DestIndex = pp_DelDirFileInfo->v_PositionInFile 
							+ vl_InsEntryLenght;
	    	pl_WriteCmd1->v_Size = sl_WriteHeader.v_FinalFileSize 
						- pl_WriteCmd1->u_Dest.v_DestIndex;