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stmhal: Ability to stat /flash and /sd. 

Addresses issue #780.
This commit is contained in:
Damien George 2014-08-06 19:02:34 +01:00
parent 2fe2a05f9f
commit 8a11d693cf
1 changed files with 38 additions and 7 deletions
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45
stmhal/modos.c
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@ -45,6 +45,15 @@
static char lfn[_MAX_LFN + 1]; /* Buffer to store the LFN */
#endif
STATIC bool sd_in_root(void) {
#if MICROPY_HW_HAS_SDCARD
// TODO this is not the correct logic to check for /sd
return sdcard_is_present();
#else
return false;
#endif
}
STATIC mp_obj_t os_chdir(mp_obj_t path_in) {
const char *path;
path = mp_obj_str_get_str(path_in);
@ -92,11 +101,9 @@ STATIC mp_obj_t os_listdir(uint n_args, const mp_obj_t *args) {
if (path[0] == '/' && path[1] == '\0') {
mp_obj_t dir_list = mp_obj_new_list(0, NULL);
mp_obj_list_append(dir_list, MP_OBJ_NEW_QSTR(MP_QSTR_flash));
#if MICROPY_HW_HAS_SDCARD
if (sdcard_is_present()) { // TODO this is not the correct logic to check for /sd
if (sd_in_root()) {
mp_obj_list_append(dir_list, MP_OBJ_NEW_QSTR(MP_QSTR_sd));
}
#endif
return dir_list;
}
@ -195,6 +202,21 @@ STATIC mp_obj_t os_rmdir(mp_obj_t path_o) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_rmdir_obj, os_rmdir);
// Checks for path equality, ignoring trailing slashes:
// path_equal(/, /) -> true
// path_equal(/flash//, /flash) -> true
// second argument must be in canonical form (meaning no trailing slash, unless it's just /)
STATIC bool path_equal(const char *path, const char *path_canonical) {
for (; *path_canonical != '\0' && *path == *path_canonical; ++path, ++path_canonical) {
}
if (*path_canonical != '\0') {
return false;
}
for (; *path == '/'; ++path) {
}
return *path == '\0';
}
STATIC mp_obj_t os_stat(mp_obj_t path_in) {
const char *path = mp_obj_str_get_str(path_in);
@ -204,16 +226,22 @@ STATIC mp_obj_t os_stat(mp_obj_t path_in) {
fno.lfsize = 0;
#endif
if (path[0] == '/' && path[1] == '\0') {
// stat root directory
FRESULT res;
if (path_equal(path, "/") || path_equal(path, "/flash") || path_equal(path, "/sd")) {
// stat built-in directory
if (path[1] == 's' && !sd_in_root()) {
// no /sd directory
res = FR_NO_PATH;
goto error;
}
fno.fsize = 0;
fno.fdate = 0;
fno.ftime = 0;
fno.fattrib = AM_DIR;
} else {
FRESULT res = f_stat(path, &fno);
res = f_stat(path, &fno);
if (res != FR_OK) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(fresult_to_errno_table[res])));
goto error;
}
}
@ -244,6 +272,9 @@ STATIC mp_obj_t os_stat(mp_obj_t path_in) {
t->items[9] = MP_OBJ_NEW_SMALL_INT(seconds); // st_ctime
return t;
error:
nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(fresult_to_errno_table[res])));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(os_stat_obj, os_stat);