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62 lines
1.7 KiB
62 lines
1.7 KiB
use alloc::vec::Vec;
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pub fn get_num_app() -> usize {
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extern "C" { fn _num_app(); }
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unsafe { (_num_app as usize as *const usize).read_volatile() }
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}
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pub fn get_app_data(app_id: usize) -> &'static [u8] {
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extern "C" { fn _num_app(); }
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let num_app_ptr = _num_app as usize as *const usize;
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let num_app = get_num_app();
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let app_start = unsafe {
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core::slice::from_raw_parts(num_app_ptr.add(1), num_app + 1)
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};
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assert!(app_id < num_app);
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unsafe {
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core::slice::from_raw_parts(
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app_start[app_id] as *const u8,
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app_start[app_id + 1] - app_start[app_id]
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)
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}
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}
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#[allow(unused)]
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pub fn get_app_data_by_name(name: &str) -> Option<&'static [u8]> {
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let num_app = get_num_app();
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let app_names = app_names();
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(0..num_app)
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.find(|&i| app_names[i] == name)
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.map(|i| get_app_data(i))
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}
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#[allow(unused)]
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fn app_names() -> Vec<&'static str> {
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let num_app = get_num_app();
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extern "C" { fn _app_names(); }
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let mut start = _app_names as usize as *const u8;
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let mut v = Vec::new();
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unsafe {
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for _ in 0..num_app {
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let mut end = start;
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while end.read_volatile() != '\n' as u8 {
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end = end.add(1);
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}
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let slice = core::slice::from_raw_parts(start, end as usize - start as usize);
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let str = core::str::from_utf8(slice).unwrap();
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v.push(str);
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// Mention that there is a extra char between names
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start = end.add(2);
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}
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}
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v
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}
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pub fn list_apps() {
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let apps = app_names();
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println!("/**** APPS ****");
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for app in apps {
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println!("{}", app);
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}
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println!("**************/")
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} |