Function storage_common_merge 

pub unsafe extern "C" fn storage_common_merge(
    storage: *mut Storage,
    old_path: *const c_char,
    new_path: *const c_char,
) -> FS_Error

Copy the contents of one directory into another and rename all conflicting files.

Arguments

• storage - pointer to a storage API instance.
• old_path - pointer to a zero-terminated string containing the source path.
• new_path - pointer to a zero-terminated string containing the destination path.

Returns

FSE_OK if the directories have been successfully merged, any other error code on failure.