[Libguestfs] New API: node_nr_values

As a follow-up to node_nr_children discussed in "hivex lib: Add function hivex_node_num_children", I've also created the function node_nr_values, which just returns the number of values of a node (primarily for optimization purposes). I hope I've done it correctly so that a follow-up commit is unneeded. The git tree is here: https://github.com/kupiakos/hivex/tree/node_nr_values This is the patch: diff --git a/generator/generator.ml b/generator/generator.ml index 4f878ff..83fd276 100755 --- a/generator/generator.ml +++ b/generator/generator.ml @@ -242,6 +242,12 @@ string C<\"\"> here. The default key is often written C<\"@\">, but inside hives that has no meaning and won't give you the default key."; + "node_nr_values", (RSize, [AHive; ANode "node"]), + "return the number of values attached to a node", + "\ +Return the number of (key, value) pairs attached to this node +as produced by C<hivex_node_values>."; + "value_key_len", (RSize, [AHive; AValue "val"]), "return the length of a value's key", "\ diff --git a/lib/value.c b/lib/value.c index 43e89f9..2dfe006 100644 --- a/lib/value.c +++ b/lib/value.c @@ -159,6 +159,22 @@ hivex_node_get_value (hive_h *h, hive_node_h node, const char *key) } size_t +hivex_node_nr_values (hive_h *h, hive_node_h node) +{ + if (!IS_VALID_BLOCK (h, node) || !block_id_eq (h, node, "nk")) { + SET_ERRNO (EINVAL, "invalid block or not an 'nk' block"); + return 0; + } + + struct ntreg_nk_record *nk = + (struct ntreg_nk_record *) ((char *) h->addr + node); + + size_t nr_values = le32toh (nk->nr_values); + + return nr_values; +} + +size_t hivex_value_struct_length (hive_h *h, hive_value_h value) { size_t key_len; Regards, - Kevin Haroldsen (kupiakos)