[tsdb] Improve exception handling.

Author: armink

src/fdb_tsdb.c

@@ -112,7 +112,7 @@ static fdb_err_t read_tsl(fdb_tsdb_t db, fdb_tsl_t tsl)
     /* read TSL index raw data */
     _fdb_flash_read((fdb_db_t)db, tsl->addr.index, (uint32_t *) &idx, sizeof(struct log_idx_data));
     tsl->status = (fdb_tsl_status_t) _fdb_get_status(idx.status_table, FDB_TSL_STATUS_NUM);
-    if (tsl->status == FDB_TSL_PRE_WRITE) {
+    if ((tsl->status == FDB_TSL_PRE_WRITE) || (tsl->status == FDB_TSL_UNUSED)) {
         tsl->log_len = db->max_len;
         tsl->addr.log = FDB_DATA_UNUSED;
         tsl->time = 0;
@@ -510,13 +510,15 @@ void fdb_tsl_iter_by_time(fdb_tsdb_t db, fdb_time_t from, fdb_time_t to, fdb_tsl
                 /* search all TSL */
                 do {
                     read_tsl(db, &tsl);
-                    if (tsl.time >= from && tsl.time <= to) {
-                        /* iterator is interrupted when callback return true */
-                        if (cb(&tsl, cb_arg)) {
+                    if (tsl.status != FDB_TSL_UNUSED) {
+                        if (tsl.time >= from && tsl.time <= to) {
+                            /* iterator is interrupted when callback return true */
+                            if (cb(&tsl, cb_arg)) {
+                                return;
+                            }
+                        } else {
                             return;
                         }
-                    } else {
-                        return;
                     }
                 } while ((tsl.addr.index = get_next_tsl_addr(&sector, &tsl)) != FAILED_ADDR);
             }

src/fdb_utils.c

@@ -230,7 +230,9 @@ size_t fdb_blob_read(fdb_db_t db, fdb_blob_t blob)
     if (read_len > blob->saved.len) {
         read_len = blob->saved.len;
     }
-    _fdb_flash_read(db, blob->saved.addr, blob->buf, read_len);
+    if (_fdb_flash_read(db, blob->saved.addr, blob->buf, read_len) != FDB_NO_ERR) {
+        read_len = 0;
+    }
 
     return read_len;
 }
@@ -253,7 +255,9 @@ fdb_err_t _fdb_flash_read(fdb_db_t db, uint32_t addr, void *buf, size_t size)
 #endif
     } else {
 #ifdef FDB_USING_FAL_MODE
-        fal_partition_read(db->storage.part, addr, (uint8_t *) buf, size);
+        if (fal_partition_read(db->storage.part, addr, (uint8_t *) buf, size) < 0) {
+            result = FDB_READ_ERR;
+        }
 #endif
     }