fs58setsize.c

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#ifdef FSS_FTR

/*****************************************************************************
 .......................................................................
.                COPYRIGHT (c) Philips Semiconductors Nuremberg 2003    .
.     All rights are reserved. Reproduction in whole or in part is      .
.     prohibited without the written consent of the copyright owner.    .
 .......................................................................
.. File name :    Fs58SetSize.c
.. Project :      SSYOL3 WAP/MMS
.. Module :       OSFS
.. %version:      4 %
.. Compiler name and release:
..
.............:........:..........:............:...............................*
 *----------------------------------------------------------------------------*
 *                              DESCRIPTION
 *                   SET THE SIZE OF A FILE TO A NEW SIZE
 *                     (EITHER EXTENDING OR TRUNCATING)
 *                      
 *----------------------------------------------------------------------------*
 *----------------------------------------------------------------------------*
 *                           FUNCTIONS DEFINED IN THIS FILE
 *----------------------------------------------------------------------------*
 * Name                                 | Object
 *----------------------------------------------------------------------------*
 * Fs58_01SetSize                       |  SetSize function 
 * Fs58_02ProcessSetSize                |  send request for setsize to FSS
 *----------------------------------------------------------------------------*
 *                                    EVOLUTION
 *----------------------------------------------------------------------------*
 * Date      | Author      | Description
 *----------------------------------------------------------------------------*
 * 29.01.02  | L. KEANE    |  Creation
 * 13.03.03  | tcmc_sgp    |  implementation
 * 31.03.03  | tcmc_sgp    |  addition of exception handle and commments
 *----------------------------------------------------------------------------*
 *****************************************************************************/

#ifdef SYNCHRONOUS_FILE_SYSTEM_FTR

#define ACCESS_RIGHTS_INTERNAL_FS
#define FS58SETSIZE_C

#define	MODULE_NUMBER	MODULE_OSFS
#undef  FILE_NUMBER
#define FILE_NUMBER     58

/*inc - INCLUDE
---------------*/
#include "Fs.h"

/*lc - LOCAL CONSTANTS DECLARATION
-----------------------------------*/

/*lm - LOCAL MACROS DEFINITION
------------------------------*/

/*ld - LOCAL LITERAL DEFINITION
--------------------------------*/

/*ls - LOCAL STRUCTURE DEFINITION
----------------------------------*/

/*lp - LOCAL PROCEDURES DECLARATION
------------------------------------*/

/*lv - LOCAL VARIABLES DEFINITION
---------------------------------*/


/*S(***************************************************************************
 * Semantic name : Fs58_01SetSize()
 * Object :  FSetSize function
 * Finite state machine :
 * Event :
 * Transition :
 *----------------------------------------------------------------------------*
 *
 * Input parameters  :
 * -------------------
 *    pp_Param
 *
 * Output parameters :
 * -------------------
 *    Return 
 *                       
 *                   
 * Used variables    :
 * -------------------
 *    GLOBAL:
 *
 *
 * Used procedures   :
 * -------------------
 *                   - MC_FS_BF_RESIZE_FILE
 *
 *----------------------------------------------------------------------------*
 *----------------------------------------------------------------------------*
 *                                    DESCRIPTION
 *               
 *        Set the file size. It can: only truncate the file size
 *        Extending file is not performed by this function!
 *  
 *----------------------------------------------------------------------------*
 **************************************************************************)S*/

#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 1

void Fs58_01SetSize(void *pp_Param)
{
  register t_FsCmdSetSize * pl_Param = (t_FsCmdSetSize *) pp_Param;
  
  u32 vl_ObjID = pl_Param->p_Stream->v_FileID;
  s32 vl_NewSize = pl_Param->v_NewSize;
  s32 vl_Status = FS_OK;

  /* Verify if file would open in write */
    if ( pl_Param->p_Stream->s_OpenMode.v_WriteEnabled == FALSE )
    {
	/* Err -> File not open for write */
	MC_FS_STATUS(pl_Param) = FS_EBADF;
	MC_DIN_ERROR(NO_BLOCKING,0x00);
	return;
    }

    /* If size of the elements < 0 */
    if ( vl_NewSize < 0 )
    {
	/* Input parameters are uncoherent */
	MC_FS_STATUS(pl_Param) = FS_EINVAL;
	MC_DIN_ERROR(NO_BLOCKING,0x01);
	return;
    }
    
    MC_FS_BF_RESIZE_FILE(vl_ObjID, vl_NewSize, &vl_Status);

    /* If error in setting the size */
    if ( vl_Status != FS_OK )
    {
	    /* set the error code */
	    MC_FS_STATUS(pl_Param) = vl_Status;
	    return;
    }
    
    /* update the file size */
    pl_Param->p_Stream->v_FileSize = vl_NewSize;

    /* if the file position ends up outside the limits of new file size then
       set the new file position to end of new file size */
    if ( (pl_Param->p_Stream->v_FilePosition) >
	 (pl_Param->p_Stream->v_FileSize) )
    {
	pl_Param->p_Stream->v_FilePosition = pl_Param->p_Stream->v_FileSize;
    }	
}

/*S(***************************************************************************
 * Semantic name : Fs58_02ProcessSetSize
 * Object :  Request for setsize function by application
 * Finite state machine :
 * Event :
 * Transition :
 *----------------------------------------------------------------------------*
 *
 * Input parameters  :
 * -------------------
 *    vp_Behaviour - Conf message is needed or not
 *    pp_Stream - file handle
 *    vp_NewSize - new size of the file
 *
 * Output parameters :
 * -------------------
 *    Return - Request ID
 *                       
 *                   
 * Used variables    :
 * -------------------
 *    GLOBAL:
 *
 *
 * Used procedures   :
 * -------------------
 *                   - MC_FS_GET_MEMORY
 *                   - MC_FS_MA_SEND_CMD_MSG_TO_FS
 *----------------------------------------------------------------------------*
 *----------------------------------------------------------------------------*
 *                                    DESCRIPTION
 *               
 *        Set the file size. It can:
 *          - truncate the file size
 *          - extend the file size
 *  
 *----------------------------------------------------------------------------*
 **************************************************************************)S*/

#undef PROCEDURE_NUMBER 
#define PROCEDURE_NUMBER 2

u32 Fs58_02ProcessSetSize( u8 vp_Behaviour,
			   t_fsFILE * pp_Stream, t_fs_size_t vp_NewSize)
{
   /* Reserve message space */
   t_FsCmdSetSize * pl_SetSize =
       (t_FsCmdSetSize *) MC_FS_GET_MEMORY(sizeof(t_FsCmdSetSize *));

    /* Fill message with input parameters */
    pl_SetSize->p_Stream = pp_Stream;
    pl_SetSize->v_NewSize = vp_NewSize;

    /* Send message by setting operation and return command identifier */
    return( MC_FS_MA_SEND_CMD_MSG_TO_FS(vp_Behaviour,
				      (void*)pl_SetSize, FS_CMD_SETSIZE_REQ));
}

#endif

#endif /* FSS_FTR */