int dopen(const char *name)
{
iop_file_t *f = get_new_file();
char *filename;
int res;
if (!f)
return -EMFILE;
if ((filename = find_iop_device(name, &f->unit, &f->device)) == (char *)-1)
{
f->device = NULL;
return -ENODEV;
}
f->mode = 8; /* Indicates a directory. */
if ((res = f->device->ops->dopen(f, filename)) >= 0)
res = (int)(f - file_table);
else
{
f->mode = 0;
f->device = NULL;
}
return res;
}
int open(const char *name, int flags, int mode)
{
iop_file_t *f = get_new_file();
char *filename;
int res = -ENOSYS;
if (!f)
{
return -EMFILE;
}
if ((filename = find_iop_device(name, &f->unit, &f->device)) == (char *)-1)
{
f->device = NULL;
return -ENODEV;
}
f->mode = flags;
if ((res = f->device->ops->open(f, filename, flags, mode)) >= 0)
{
res = (int)(f - file_table);
}
else
{
f->mode = 0;
f->device = NULL;
}
return res;
}
static void get_first_unit(file_list_dir_t *p_dir, file_list_t *p_list)
{
if (p_dir->ready_cnt == 0 && p_dir->all_ready == FALSE)
{
p_dir->p_priv_list
= mtos_malloc(sizeof(priv_list_t) + p_dir->unit_cnt * sizeof(media_file_t));
CHECK_FAIL_RET_VOID(p_dir->p_priv_list != NULL);
p_dir->p_priv_list->p_file = (media_file_t *)((u32)p_dir->p_priv_list + sizeof(priv_list_t));
p_dir->p_priv_list->p_next = NULL;
p_dir->ready_cnt = get_new_file(p_dir, p_dir->p_priv_list->p_file);
p_dir->p_priv_list->index = 0;
if (p_dir->ready_cnt < p_dir->unit_cnt)
{
p_dir->all_ready = TRUE;
if (p_dir->ready_cnt == 0)
{
mtos_free(p_dir->p_priv_list);
p_dir->p_priv_list = NULL;
}
}
}
if (p_dir->ready_cnt == 0)
{
p_list->p_file = NULL;
p_list->file_count = 0;
return ;
}
p_dir->cur_index = 0;
p_list->p_file = p_dir->p_priv_list->p_file;
p_list->file_count
= (p_dir->ready_cnt < p_dir->unit_cnt ? p_dir->ready_cnt : p_dir->unit_cnt);
}
static void get_last_unit(file_list_dir_t *p_dir, file_list_t *p_list)
{
priv_list_t *p_priv_list = NULL;
u32 file_cnt = 0;
u16 last_idx = 0;
if (p_dir->ready_cnt == 0)
{
p_list->p_file = NULL;
p_list->file_count = 0;
return ;
}
last_idx = (p_dir->ready_cnt - 1) / p_dir->unit_cnt;
p_priv_list = p_dir->p_priv_list;
while (p_priv_list != NULL)
{
if (last_idx == p_priv_list->index)
{
if (p_dir->all_ready == TRUE)
{
p_dir->cur_index = last_idx;
p_list->p_file = p_priv_list->p_file;
file_cnt = p_dir->cur_index * p_dir->unit_cnt;
file_cnt = p_dir->ready_cnt - file_cnt;
p_list->file_count = (file_cnt < p_dir->unit_cnt ? file_cnt : p_dir->unit_cnt);
return ;
}
else
{
break;
}
}
p_priv_list = p_priv_list->p_next;
}
while (p_dir->all_ready == FALSE)
{
p_priv_list->p_next
= mtos_malloc(sizeof(priv_list_t) + p_dir->unit_cnt * sizeof(media_file_t));
CHECK_FAIL_RET_VOID(p_priv_list->p_next != NULL);
p_priv_list->p_next->p_file = (media_file_t *)(p_priv_list->p_next + sizeof(priv_list_t));
file_cnt = get_new_file(p_dir, p_priv_list->p_next->p_file);
if (file_cnt < p_dir->unit_cnt)
{
p_dir->all_ready = TRUE;
if (file_cnt > 0)
{
p_priv_list = p_priv_list->p_next;
p_priv_list->index = p_dir->cur_index + 1;
p_priv_list->p_next = NULL;
p_list->p_file = p_priv_list->p_file;
p_list->file_count = file_cnt;
}
else
{
p_list->p_file = p_priv_list->p_file;
p_list->file_count = p_dir->unit_cnt;
mtos_free(p_priv_list->p_next);
p_priv_list->p_next = NULL;
}
return ;
}
else
{
p_priv_list = p_priv_list->p_next;
p_priv_list->index = p_dir->cur_index + 1;
p_priv_list->p_next = NULL;
}
}
}