/*C**************************************************************************
* NAME: file.c
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.10
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains extention routines to the file system
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "config.h" /* system configuration */
#include "modules\display\disp_task.h" /* display definition */
#include "file.h" /* file system definition */
/*_____ M A C R O S ________________________________________________________*/
#define F_SEEK_TIME ((Byte)4)
extern bit fs_memory; /* selected file system */
/*_____ D E F I N I T I O N ________________________________________________*/
/*_____ D E C L A R A T I O N ______________________________________________*/
/*F**************************************************************************
* NAME: file_seek_prev
*----------------------------------------------------------------------------
* PARAMS:
* id: file type identifier
* loop: loop to the last file
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Select previous file with specified extension
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* Depending on the time played, this function selects the previous file
* or restarts the file under playing.
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit file_seek_prev (Byte id, bit loop)
{
if ((disp_get_sec() < F_SEEK_TIME) && (disp_get_min() == 0))
{
while (File_goto_prev() == OK)
{
/* a file or a directory exists */
if ((File_type() & id) != 0) /* specified file type found */
{
return TRUE; /* exit when found */
}
}
/* beginning of dir */
if (File_goto_last() == OK) /* goto to the end of dir */
{
if (loop) /* loop = false when ask previous and play */
{
do
{
if ((File_type() & id) != 0) /* look for a specified file */
{ /* specified file type found */
return TRUE; /* exit when found */
}
}
while (File_goto_prev() == OK);
return FALSE;
}
else /* no loop */
{
return FALSE; /* Stop at the last */
}
}
else
return FALSE;
}
return TRUE;
}
/*F**************************************************************************
* NAME: file_seek_next
*----------------------------------------------------------------------------
* PARAMS:
* id: file type identifier
* loop: loop to the first file
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Select next file with specified extension
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit file_seek_next (Byte id, bit loop)
{
while (File_goto_next() == OK)
{
/* file or dir found */
if ((File_type() & id) != 0)
{ /* specified file type found */
return TRUE; /* exit when found */
}
}
/* end of dir */
if (File_goto_first() == OK) /* goto beginning of the dir */
{
if (loop) /* loop ? */
{ /* re-start at the beginning */
do
{
if ((File_type() & id) != 0) /* look for a specified file */
{ /* specified file type found */
return TRUE; /* exit when found */
}
}
while (File_goto_next() == OK);
return FALSE; /* no specified file in the dir */
}
else /* no loop */
{
return FALSE; /* Stop at the beginning */
}
}
else
return FALSE;
}
/*F**************************************************************************
* NAME: file_entry_dir
*----------------------------------------------------------------------------
* PARAMS:
* id: file type identifier
*
* return:
* OK: file type found in dir
* KO: file type not found in dir
*----------------------------------------------------------------------------
* PURPOSE:
* Enter a directory
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
bit file_entry_dir (Byte id)
{
if (File_type() == FILE_DIR) /* only for directory! */
{ /* stopped on a directory */
if (File_goto_child(id) == KO)
{
/* no file in dir */
File_goto_parent(id);
return KO;
}
else
return OK;
}
else
{
return KO;
}
}
