file reading, tarfs directory listing

1 files changed, 11 insertions, 8 deletions

diff --git a/include/mercury/kernel/storage.hpp b/include/mercury/kernel/storage.hpp
index 1374766..0df0829 100644
--- a/include/mercury/kernel/storage.hpp
+++ b/include/mercury/kernel/storage.hpp
@@ -38,19 +38,22 @@ namespace mercury::kernel::storage {
     //first child of this node. get_next_child gets the child after the child
     //represented by the value of iter passed in, and changes iter to represent
     //that next child. for an empty directory node, get_first_child returns
-    //io_result::out_of_bounds. when iter represents the last child of a node,
-    //get_next_child also returns io_result::out_of_bounds.
+    //io_result::not_found. when iter represents the last child of a node,
+    //get_next_child also returns io_result::not_found.
     virtual io_result get_first_child(node_id_t node, node_id_t &out, directory_iter_t &iter_out) = 0;
     virtual io_result get_next_child(node_id_t node, node_id_t &out, directory_iter_t &iter) = 0;
-    virtual io_result get_child(node_id_t node, node_id_t &out, const char *name, size_t name_len) = 0;
+    virtual io_result get_child(node_id_t node, node_id_t &out, const char *name, unsigned name_len) = 0;
 
-    virtual io_result get_name_length(node_id_t node, size_t &length_out) = 0;
+    virtual io_result get_name_length(node_id_t node, unsigned &length_out) = 0;
     //buffer is assumed to be long enough - call get_name_length first.
-    virtual io_result get_name(node_id_t node, char *buffer, size_t &length_out) = 0;
-
+    virtual io_result get_name(node_id_t node, char *buffer, unsigned &length_out) = 0;
     virtual io_result get_file_length(node_id_t node, uint64_t &length_out) = 0;
-
     virtual io_result get_file_type(node_id_t node, file_type &out) = 0;
+
+    virtual io_result resize_file(node_id_t node, uint64_t new_length) = 0;
+    virtual io_result read_bytes_from_file(node_id_t node, uint64_t start, uint64_t count, void *into) = 0;
+    virtual io_result write_bytes_into_file(node_id_t node, uint64_t start, uint64_t count, const void *from) = 0;
+
   };
 
   class block_device {
@@ -112,7 +115,7 @@ namespace mercury::kernel::storage {
 
   };
 
-  void canonize_path(const char *str, size_t len, canon_path &out);
+  void canonize_path(const char *str, unsigned len, canon_path &out);
 
   //path must be absolute.
   io_result mount_device(block_device *bd, const canon_path &path, file_system_mounter mounter);