static int syscall_open(char *filename){
if(filename == NULL || strlen(filename) == 0)
return -1;
struct thread *cur = thread_current ();
struct file_elem *fe, *fe_prev;
struct list_elem *le;
int fd;
fe = filesys_open_file(filename);
if(fe == NULL)
return -1;
if(fe->file == NULL && fe->dir == NULL) {
/* Error occured while opening file */
return -1;
}
// If some files are opened already, fd will be fd of last opened file + 1.
if(!list_empty(&cur->open_files)) {
le = list_back(&cur->open_files);
fe_prev = list_entry(le, struct file_elem, elem);
fd = fe_prev->fd + 1;
}
void music_sheet_test_play_midi_file()
{
struct fs_posix fs;
fs_posix_init(&fs, "data");
struct file* file = filesys_open_file(&fs.__parent, "./piano_sonata_13_1_(c)oguri.mid", false);
struct music_sheet sheet;
music_sheet_init(&sheet);
music_sheet_load_from_midi_file(&sheet, file);
filesys_free(&fs.__parent);
struct music_sheet_iter iter;
music_sheet_get_iter_by_note_id(&sheet, 0, &iter);
struct syn_audioif syn;
syn_aif_init(&syn);
while (music_sheet_play_next(&sheet, &iter, &syn.__parent))
continue;
music_sheet_free(&sheet);
syn_aif_free(&syn);
}
