shared: add nm_pgbytes_hash()/nm_pgbytes_equal()

For hashing of a pointer to a GBytes*.

This is useful if your key is a GBytes array, and the
first field in your to be hashed struct.

2 files changed, 27 insertions, 0 deletions

diff --git a/shared/nm-glib-aux/nm-hash-utils.c b/shared/nm-glib-aux/nm-hash-utils.c
index cd51bbaf63..dcf662053a 100644
--- a/shared/nm-glib-aux/nm-hash-utils.c
+++ b/shared/nm-glib-aux/nm-hash-utils.c
@@ -257,3 +257,25 @@ nm_ppdirect_equal (gconstpointer a, gconstpointer b)
 
 	return **s1 == **s2;
 }
+
+/*****************************************************************************/
+
+guint
+nm_pgbytes_hash (gconstpointer p)
+{
+	GBytes *const*ptr = p;
+	gconstpointer arr;
+	gsize len;
+
+	arr = g_bytes_get_data (*ptr, &len);
+	return nm_hash_mem (1470631313u, arr, len);
+}
+
+gboolean
+nm_pgbytes_equal (gconstpointer a, gconstpointer b)
+{
+	GBytes *const*ptr_a = a;
+	GBytes *const*ptr_b = b;
+
+	return g_bytes_equal (*ptr_a, *ptr_b);
+}
diff --git a/shared/nm-glib-aux/nm-hash-utils.h b/shared/nm-glib-aux/nm-hash-utils.h
index 1f29413bd9..9879dc477b 100644
--- a/shared/nm-glib-aux/nm-hash-utils.h
+++ b/shared/nm-glib-aux/nm-hash-utils.h
@@ -314,6 +314,11 @@ gboolean nm_ppdirect_equal (gconstpointer a, gconstpointer b);
 
 /*****************************************************************************/
 
+guint nm_pgbytes_hash (gconstpointer p);
+gboolean nm_pgbytes_equal (gconstpointer a, gconstpointer b);
+
+/*****************************************************************************/
+
 #define NM_HASH_OBFUSCATE_PTR_FMT "%016" G_GINT64_MODIFIER "x"
 
 /* sometimes we want to log a pointer directly, for providing context/information about