le_device_db: add le_device_db_max_count() for index iteration

platform/posix/le_device_db_fs.c

@@ -260,6 +260,10 @@ int le_device_db_count(void){
     return counter;
 }
 
+int le_device_db_max_count(void){
+    return LE_DEVICE_MEMORY_SIZE;
+}
+
 // free device
 void le_device_db_remove(int index){
     le_devices[index].addr_type = INVALID_ENTRY_ADDR_TYPE;

platform/wiced/le_device_db_wiced_dct.c

@@ -191,6 +191,10 @@ int le_device_db_count(void){
     return counter;
 }
 
+int le_device_db_max_count(void){
+    return NVM_NUM_LE_DEVICES;
+}
+
 // get device information: addr type and address
 void le_device_db_info(int device_index, int * addr_type, bd_addr_t addr, sm_key_t irk){
 	int absolute_index = le_device_db_get_absolute_index_for_device_index(device_index);

src/ble/le_device_db.h

@@ -84,11 +84,17 @@ void le_device_db_set_local_bd_addr(bd_addr_t bd_addr);
 int le_device_db_add(int addr_type, bd_addr_t addr, sm_key_t irk);
 
 /**
- * @brief get number of devices in db for enumeration
+ * @brief get number of devices in db
  * @returns number of device in db
  */
 int le_device_db_count(void);
 
+/**
+ * @brief get max number of devices in db for enumeration
+ * @returns max number of device in db
+ */
+int le_device_db_max_count(void);
+
 /**
  * @brief get device information: addr type and address needed to identify device
  * @param index

src/ble/le_device_db_memory.c

@@ -106,6 +106,10 @@ int le_device_db_count(void){
     return counter;
 }
 
+int le_device_db_max_count(void){
+    return MAX_NR_LE_DEVICE_DB_ENTRIES;
+}
+
 // free device
 void le_device_db_remove(int index){
     le_devices[index].addr_type = INVALID_ENTRY_ADDR_TYPE;

src/ble/le_device_db_tlv.c

@@ -170,6 +170,10 @@ int le_device_db_count(void){
 	return num_valid_entries;
 }
 
+int le_device_db_max_count(void){
+    return NVM_NUM_DEVICE_DB_ENTRIES;
+}
+
 void le_device_db_remove(int index){
 	// delete entry in TLV
 	le_device_db_tlv_delete(index);