[ovs-dev] [PATCH 5/7] ovsdb-data: New function ovsdb_datum_from_shash().

[Ben Pfaff]

---
 lib/ovsdb-data.c |   25 +++++++++++++++++++++++++
 lib/ovsdb-data.h |    3 +++
 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/lib/ovsdb-data.c b/lib/ovsdb-data.c
index 9c54fe8..451e673 100644
--- a/lib/ovsdb-data.c
+++ b/lib/ovsdb-data.c
@@ -1444,6 +1444,31 @@ ovsdb_datum_to_string(const struct ovsdb_datum *datum,
     }
 }
 
+/* Initializes 'datum' as a string-to-string map whose contents are taken from
+ * 'shash'.  Destroys 'shash'. */
+void
+ovsdb_datum_from_shash(struct ovsdb_datum *datum, struct shash *sh)
+{
+    struct shash_node *node, *next;
+    size_t i;
+
+    datum->n = shash_count(sh);
+    datum->keys = xmalloc(datum->n * sizeof *datum->keys);
+    datum->values = xmalloc(datum->n * sizeof *datum->values);
+
+    i = 0;
+    SHASH_FOR_EACH_SAFE (node, next, sh) {
+        datum->keys[i].string = node->name;
+        datum->values[i].string = node->data;
+        shash_steal(sh, node);
+        i++;
+    }
+    assert(i == datum->n);
+
+    shash_destroy(sh);
+    ovsdb_datum_sort_unique(datum, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING);
+}
+
 static uint32_t
 hash_atoms(enum ovsdb_atomic_type type, const union ovsdb_atom *atoms,
            unsigned int n, uint32_t basis)
diff --git a/lib/ovsdb-data.h b/lib/ovsdb-data.h
index ae0faa2..f7e98a8 100644
--- a/lib/ovsdb-data.h
+++ b/lib/ovsdb-data.h
@@ -22,6 +22,7 @@
 
 struct ds;
 struct ovsdb_symbol_table;
+struct shash;
 
 /* One value of an atomic type (given by enum ovs_atomic_type). */
 union ovsdb_atom {
@@ -167,6 +168,8 @@ char *ovsdb_datum_from_string(struct ovsdb_datum *,
 void ovsdb_datum_to_string(const struct ovsdb_datum *,
                            const struct ovsdb_type *, struct ds *);
 
+void ovsdb_datum_from_shash(struct ovsdb_datum *, struct shash *);
+
 /* Comparison. */
 uint32_t ovsdb_datum_hash(const struct ovsdb_datum *,
                           const struct ovsdb_type *, uint32_t basis);
-- 
1.7.1