mfm47readaddr.c

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#ifdef FSS_FTR

#define ACCESS_RIGHTS_INTERNAL_MFM
#define MFM45READDIR_C

#include "mFm.h"

#undef  FILE_NUMBER
#define FILE_NUMBER 45 


#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 1

void mFm47_01GetFilesAddr( void * pp_LayerContext, void * pp_Param )
{
   t_fs_llGetFilesAddr * pl_Param = (t_fs_llGetFilesAddr *) pp_Param;
   u32 vl_UsedBufferSize;

    /* Is it a single address read ? */
    if ( pl_Param->v_Type == FS_READ_SINGLE_ADDR_WITH_ID )
    {
      u16 vl_FileID;
      u16 vl_NbrFilesGot;

	/* Yes so call VM to have address of this file */
	vl_FileID = pl_Param->v_Id;
	MC_MFM_LL_GET_FILES_ADDR( 1, &vl_FileID, NIL, 0, &vl_NbrFilesGot, 
				pl_Param->p_FileAddr, &vl_UsedBufferSize, pl_Param->p_Status );

    }
    else /* It is a directory's objects address read */
    {
       t_OpenedDirCtx * pl_DirCtx = ( t_OpenedDirCtx *) pl_Param->p_FmPrivateDirInfo;
       t_OpenedDirCtx   sl_DirCtx;
       s32 		vl_NbFilesToGet = 0;
       u32		vl_DestBuffSize = pl_Param->v_BuffSize;
       ascii *		pl_ReadBuff;
       t_fssFileAddr *  pl_CurrentFileAddr = * pl_Param->p_FileAddr;
       t_fssFileAddr *  pl_OutFileAddr;
       s32 		vl_TotalNbFilesGot = 0;
       u16 *		pl_IdTab;
       t_WhichType	vl_Which;
       u16 		vl_NbFilesGot;
       u8		vl_ExitReq = FALSE;
	
   	if ( pl_Param->v_NumbFilesToGet >= MFM_ID_TAB_SIZE ) 
		pl_IdTab = ( u16 *) MC_MFM_GET_MEMORY( sizeof (u16) * MFM_ID_TAB_SIZE );
	else  
		pl_IdTab = ( u16 *) MC_MFM_GET_MEMORY( sizeof (u16) * pl_Param->v_NumbFilesToGet );

	/* Get memory for read buffer */
	pl_ReadBuff = (ascii*) MC_MFM_GET_MEMORY( MFM_SIZE_OF_READ_BUFF );

	/* Clear number of files got */
	vl_NbFilesGot = 0;

	/* Updates which structure */
  	vl_Which.v_Position = pl_Param->v_Which; 	/* Take position */
	vl_Which.v_TypeOfObj = FM_OBJ_FILE;		/* Only files */
	vl_Which.v_InfoType = FM_ID;			/* Place IDs in destination table */

	while ( ( vl_TotalNbFilesGot < pl_Param->v_NumbFilesToGet ) && ( vl_ExitReq == FALSE ) )
	{
	    /* Clear number of files got */
	    vl_NbFilesGot = 0;
	 
	    /* Calculates number of files to get for this iteration */
	    vl_NbFilesToGet = pl_Param->v_NumbFilesToGet - vl_TotalNbFilesGot;
	    if ( vl_NbFilesToGet > MFM_ID_TAB_SIZE ) vl_NbFilesToGet = MFM_ID_TAB_SIZE;
	    else vl_ExitReq = TRUE;
	    
	    /* Save directory context before to read IDs */
	    sl_DirCtx = * pl_DirCtx;

	    /* Extract file Ids of files from directory */
	    vl_NbFilesToGet =  mFm80_04ReadEntrysOfDirFile ( vl_Which, vl_NbFilesToGet, pl_DirCtx,
				pl_IdTab, sizeof (u16) * MFM_ID_TAB_SIZE,
				pl_ReadBuff, MFM_SIZE_OF_READ_BUFF, pl_Param->p_Status );

	    /* If error or end of file exit loop */
	    if (( *pl_Param->p_Status != FS_OK ) || ( vl_NbFilesToGet == 0 ) ) break;

            MC_MFM_LL_GET_FILES_ADDR( vl_NbFilesToGet, pl_IdTab, pl_CurrentFileAddr, 
			vl_DestBuffSize, &vl_NbFilesGot, &pl_OutFileAddr, 
			&vl_UsedBufferSize, pl_Param->p_Status );

	    /* If number of files received less than number of files got than buffer is full 
				set exit flag */
	    if ( vl_NbFilesGot < vl_NbFilesToGet )
	    {
	 	vl_ExitReq = TRUE;

		/* As all addresses of files would not placed in destination addr buffer 
			the directory pointer points after the nomal position */
		/* Restore directory context */
		* pl_DirCtx = sl_DirCtx;

		/* Update directory context by reading entrys of dir file */
		vl_NbFilesToGet =  mFm80_04ReadEntrysOfDirFile ( vl_Which, vl_NbFilesGot, pl_DirCtx,
				pl_IdTab, sizeof (u16) * MFM_ID_TAB_SIZE,
				pl_ReadBuff, MFM_SIZE_OF_READ_BUFF, pl_Param->p_Status );
	    }

	    /* If error exit loop */
	    if ( *pl_Param->p_Status != FS_OK ) break;

	    /* If number of files got null than buffer can be full */
	    if ( vl_NbFilesGot == 0 )
	    {
		/* If no one file got buffer too small to receive a sigle entry set an error
					 and exit loop */
		if ( vl_TotalNbFilesGot == 0 ) 
		{
		    *pl_Param->p_Status = FS_ERANGE;
		    break;
		}
		
		else vl_ExitReq = TRUE;
	    }
	    else
	    {
		/* If number of files received less than number of files got than buffer is full 
				set exit flag */
		if ( vl_NbFilesGot < vl_NbFilesToGet ) vl_ExitReq = TRUE;

		/* Update number total of files got */
		vl_TotalNbFilesGot += vl_NbFilesGot;

		/* Updates current pointer in addr buffer */
		pl_CurrentFileAddr = (t_fssFileAddr *)( ((u8*) pl_CurrentFileAddr) + vl_UsedBufferSize);

		/* Updates available dest addr buffer size */
		vl_DestBuffSize -= vl_UsedBufferSize;
	    }

	    /* Updates which position to next */
	    vl_Which.v_Position = FS_NEXT_ELEM;
	} 

	/* Update number of files got in input parameters */
	if ( * pl_Param->p_Status != FS_OK ) * pl_Param->p_NumbOfFiles = 0;
	else  * pl_Param->p_NumbOfFiles = vl_TotalNbFilesGot;

	/* Free memory allocated for Id table */
 	MC_MFM_FREE_MEMORY( pl_IdTab );
	
	/* Free memory allocated for read buffer */
	MC_MFM_FREE_MEMORY( pl_ReadBuff );

    }

}



#endif /* FSS_FTR */