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;
}
int fb_iterator_has_next(){
if(iterator_index>=filecount)return 0;
int a = iterator_index;
while(1){
if(a==filecount)return 0;
if(nav_filelist_goto(a++)==FALSE)return 0;
if(!nav_file_checkext(ext))continue;
return 1;
}
}
int fb_iterator_seek(int i){
if(i>=filecount) return ERROR_INDEX_OUT_OF_BOUNDS;
if(i<0) return ERROR_INDEX_OUT_OF_BOUNDS;
int j = 0;
while(i>=0 && j<filecount){
nav_filelist_goto(j++);
if(nav_file_checkext(ext))i--;
}
j--;
//Seeker reached end of directory without successfully seeking i files
//with file extension ext.
if(i>=0)return ERROR_INDEX_OUT_OF_BOUNDS;
iterator_index = j;
return 0;
}
//! This function goes to the previous position in filtered file list
//!
//! @return false in case of an error or no next file, see global value "fs_g_status" for more detail
//! @return true otherwise
//!
bool nav_filterlist_previous( void )
{
uint16_t u16_current_pos;
u16_current_pos = nav_filelist_get();
while( nav_filelist_set( 0, FS_FIND_PREV ) )
{
if( nav_file_isdir()
|| nav_file_checkext( fs_g_nav.sz_filterext ) )
{
fs_g_nav.u16_pos_filterlist--;
return true;
}
}
nav_filelist_goto( u16_current_pos );
return false;
}
char *fb_iterator_next(){
static char filename[255];
while(1){
if(iterator_index==filecount){
return NULL;
}
if(nav_filelist_goto(iterator_index++)==FALSE){
return NULL;
}
if(!nav_file_checkext(ext))continue;
if(nav_file_getname(filename,sizeof(filename))==FALSE){
return NULL;
}
return filename;
}
}
//! This function goes to the next position in the filtered file list
//!
//! @return false in case of error or no next file, see global value "fs_g_status" for more detail
//! @return true otherwise
//!
bool nav_filterlist_next( void )
{
uint16_t u16_current_pos;
u16_current_pos = nav_filelist_get();
while( nav_filelist_set( 0, FS_FIND_NEXT ) )
{
if( nav_file_isdir()
|| nav_file_checkext( fs_g_nav.sz_filterext ) )
{
if( FS_NO_SEL == u16_current_pos )
{
fs_g_nav.u16_pos_filterlist = 0;
}else{
fs_g_nav.u16_pos_filterlist++;
}
return true;
}
}
nav_filelist_goto( u16_current_pos );
return false;
}