int fb_iterator_init(Bool type){
file_or_dir = type;
fb_iterator_reset();
// if no navigator available, return an error
if ((iterator_navid = fsaccess_alloc_nav_id()) < 0) return ERROR_NO_NAV_ID;
fsaccess_take_mutex();
// select the navigator
nav_select( iterator_navid );
// navigate to folder
if(nav_setcwd((FS_STRING)currentDirectory, FALSE, FALSE) == FALSE){
fsaccess_free_nav_id(iterator_navid);
return ERROR_NOT_A_DIRECTORY;
}
//select top of list
if(nav_filelist_first(type)==FALSE){
fsaccess_free_nav_id(iterator_navid);
return ERROR_UNKNOWN;
}
nav_filelist_single_enable( type );
filecount = nav_filelist_nb(file_or_dir);
return 0;
}
/*!
* \brief Is a directory present?
*
* \param pcStringDirName Input. Directory name string.
*
* \return 1 if the directory exists, 0 if the directory doesn't exist, else -1
*/
int8_t fsaccess_IsDirPresent( const char *pcStringDirName )
{
signed short TempoNavId;
int8_t RetVal;
fsaccess_take_mutex(); // Take the mutex on the file system access.
TempoNavId = fsaccess_alloc_nav_id(); // Get a navigator.
if( -1 == TempoNavId ) // No navigator.
{
// give the mutex for nav access
fsaccess_give_mutex();
return( -1 );
}
// select the navigator
nav_select( TempoNavId );
// Try to enter in the directory.
RetVal = (int8_t)nav_setcwd( (FS_STRING)pcStringDirName, true, false );
fsaccess_free_nav_id( TempoNavId ); // mark NavId as free
fsaccess_give_mutex(); // give the mutex for nav access
return( RetVal );
}
int fb_ls_ext(const char *ext){
int CurrentNavId = -1;
// if no navigator available, return an error
if ((CurrentNavId = fsaccess_alloc_nav_id()) < 0) return ERROR_NO_NAV_ID;
// select the navigator
nav_select( CurrentNavId );
// navigate to folder
if(nav_setcwd((FS_STRING)currentDirectory, FALSE, FALSE) == FALSE){
fsaccess_free_nav_id(CurrentNavId);
return ERROR_NOT_A_DIRECTORY;
}
if(nav_filelist_first(FS_FILE)==FALSE){
fsaccess_free_nav_id(CurrentNavId);
return ERROR_UNKNOWN;
}
char filename[255];
if(nav_file_getname(filename,sizeof(filename))==FALSE){
fsaccess_free_nav_id(CurrentNavId);
return ERROR_UNKNOWN;
}
seprintf("Contents of folder %s:\n\n",currentDirectory);
nav_filelist_single_enable( FS_DIR );
int filecount = nav_filelist_nb(FS_DIR);
short a;
for(a=0; a < filecount; a++){
if(nav_filelist_goto(a)==FALSE)return ERROR_UNKNOWN;
char filename[255];
if(nav_file_getname(filename,sizeof(filename))==FALSE){
fsaccess_free_nav_id(CurrentNavId);
return ERROR_UNKNOWN;
}
seprintf("%d: %s\n",a,filename);
}
nav_filelist_single_enable( FS_FILE );
filecount = nav_filelist_nb(FS_FILE);
for(a=0; a < filecount; a++){
if(nav_filelist_goto(a)==FALSE)return ERROR_UNKNOWN;
if(!nav_file_checkext(ext))continue;
char filename[255];
if(nav_file_getname(filename,sizeof(filename))==FALSE){
fsaccess_free_nav_id(CurrentNavId);
return ERROR_UNKNOWN;
}
seprintf("%d: %s\n",a,filename);
}
fsaccess_free_nav_id(CurrentNavId);
return 0;
}
//!
//! This function closes a file.
//!
//! @param fd file descriptor.
//!
//! @return int : -1 if error, 0 otherwise
//!
int close(int fd)
{
if (fd < 0)
{
return (-1);
}
// take the mutex for nav access
fsaccess_take_mutex();
nav_select( fd );
file_close();
fsaccess_free_nav_id(fd);
// give the mutex for nav access
fsaccess_give_mutex();
return (0);
}
void fb_iterator_terminate(){
fsaccess_free_nav_id(iterator_navid);
fsaccess_give_mutex();
}
//!
//! This function opens a file.
//!
//! @param pathname path of the file to open.
//! @param flags flags to give file access rights
//! should be O_CREAT : create file if not exist
//! O_APPEND : add data to the end of file
//! O_RDONLY : Read Only
//! O_WRONLY : Write Only
//! O_RDWR : Read/Write
//! @return int : file descriptor (>= 0 if OK (NavID), -1 otherwise)
//!
int open(const char *pathname, int flags, ...)
{
int CurrentNavId = -1;
// take the mutex for nav access
fsaccess_take_mutex();
// if no navigator available, return an error
if ((CurrentNavId = fsaccess_alloc_nav_id()) < 0) goto error_exit;
// select the navigator
nav_select( CurrentNavId );
// the filesystem is now at the root directory
if ((flags & O_CREAT) == O_CREAT)
{
// try to create, the flag is set
if(nav_setcwd((FS_STRING)pathname, false, true) == false)
{
goto error_free_nav;
}
}
else
{
// do not try to create, if it doesn't exist, error
if(nav_setcwd((FS_STRING)pathname, false, false) == false)
{
goto error_free_nav;
}
}
// if user wants to append in file
if ((flags & O_APPEND) == O_APPEND)
{
// open the file
if (file_open(FOPEN_MODE_APPEND) == false) goto error_free_nav;
}
else if ((flags & O_RDWR) == O_RDWR)
{
// open as read/write
if (file_open(FOPEN_MODE_R_PLUS) == false) goto error_free_nav;
}
else if ((flags & O_WRONLY) == O_WRONLY)
{
// open as write
if (file_open(FOPEN_MODE_W) == false) goto error_free_nav;
}
else
{
// open as read
if (file_open(FOPEN_MODE_R) == false) goto error_free_nav;
}
// give the mutex for nav access
fsaccess_give_mutex();
return (CurrentNavId);
error_free_nav:
// mark NavId as free
fsaccess_free_nav_id(CurrentNavId);
error_exit:
// give the mutex for nav access
fsaccess_give_mutex();
return(-1);
}
